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The effect of clay content on the relation between uniaxial compressive strength and needle penetration index for clay-bearing rocks Int. J. Geo-Eng. Pub Date : 2021-02-27 Sair Kahraman, A. Sercan Aloglu, Egemen Saygin, Bilal Aydin
The needle penetration index (NPI) test is a non-destructive test that is applicable both in the field and laboratory, and does not require any special sample preparation. This test has been used for the estimation of physico-mechanical properties of soft rocks. In this study, the influence of the clay content on the relation between uniaxial compressive strength (UCS) and the NPI has been investigated
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A parametric study on cyclic strength of coastal sand of Digha in West Bengal, India Int. J. Geo-Eng. Pub Date : 2021-02-12 Pinak Ray, Ramendu Bikas Sahu
Stress controlled cyclic triaxial tests have been carried out on coastal sand of Digha, West Bengal, India at different frequencies, confining pressures, relative densities and number of loading cycles for determination of influence of these parameters on cyclic strength (expressed in terms of cyclic stress ratio) and initial liquefaction of Digha sand. The test results provide evidence that increasing
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Analytical technique for stability analyses of the rock slope subjected to slide head toppling failure mechanisms considering groundwater and stabilization effects Int. J. Geo-Eng. Pub Date : 2021-02-03 Victor Mwango Bowa, Wenping Gong
The contributions of the current analytical models on the prediction of the stability of the slope subjected to slide head toppling failure mechanisms, have always focused on the idealized geometry comprising regular blocks dipping into the slope face. Besides, the influence of groundwater and stabilizations from the lowermost block of the slope have been overlooked in the available literature. In
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Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South Korea Int. J. Geo-Eng. Pub Date : 2021-01-26 Yumin Ji, Byungmin Kim, Kiseog Kim
This study evaluates the potentials of liquefaction caused by the 2017 moment magnitude 5.4 earthquake in Pohang City, South Korea. We obtain shear wave velocity profiles measured by suspension PS logging tests at the five sites near the epicenter. We also perform downhole tests at three of the five sites. Among the five sites, the surface manifestations (i.e., sand boils) were observed at the three
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Neutralization effect of slag on the acid rock drainage Int. J. Geo-Eng. Pub Date : 2021-01-09 Inwoo Baek, Jaegon Kim, Youngsuk Song, Taehyung Kim
Aims/hypothesis Pohang Tertiary mudstone presents the issue of acid rock drainage. This study analyzed the capacity of a mixed slag (70% steel slag + 30% blast furnace slag) to neutralize Pohang Tertiary mudstone’s acid rock drainage. Methods Element analysis, acid neutralization capacity (ANC) test, and net acid generation (NAG) test were conducted on Pohang Tertiary mudstone samples and the mixed
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Numerical analysis of static behavior of caisson-type quay wall deepened by grouting rubble-mound Int. J. Geo-Eng. Pub Date : 2021-01-09 Anh-Dan Nguyen, Young-Sang Kim, Gyeong-O Kang, Hui-Jin Kim
Caisson type gravity quay wall is a common structure used in the coastal regions. However, many of the existing quay walls constructed in the past are becoming obsolete. Therefore, the main goal of this study is to enhance the performance of these quay walls by increasing the front water depth. To deepen the water depth, a special grout type is ejected to solidify the rubble mound under the caisson
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A numerical geotechnical model for computing soil slides at banks of water reservoirs Int. J. Geo-Eng. Pub Date : 2020-12-13 Nils Reidar B. Olsen, Stefan Haun
Soil slides can occur when the water level in a lake or a reservoir is lowered. This may take place in situations when a reservoir is flushed to remove sediments. The current study describes a three-dimensional numerical model used for the simulation of reservoir flushing that includes the slide movements. The geotechnical failure algorithms start with modelling the groundwater levels at the banks
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Hydro-mechanical response of excavating tunnel in deep saturated ground Int. J. Geo-Eng. Pub Date : 2020-12-08 Simon Heru Prassetyo, Marte Gutierrez
Excavating a tunnel in a deep and saturated ground affects the short- and long-term hydro-mechanical (H-M) response in the ground surrounding the opening. However, the interactions between transient pore pressure behavior and the corresponding deformation and stresses in the ground ahead of and behind the tunnel face are still not well understood. This paper investigates the transient H-M response
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Empirical and finite element based stability analysis of highway cut slopes in Uttarakhand Himalayan terrain, India Int. J. Geo-Eng. Pub Date : 2020-12-02 Hari Om Singh, Tariq Anwar Ansari, T. N. Singh, K. H. Singh
The present paper deals with different empirical methods and finite element method of slope stability analysis along National Highway (NH)-7, in Uttarakhand, India. The highway is only path in the hilly terrain of Lesser Himalayan for the public transport and have strategic importance due to militaries possession routes. This route is also significant due to having many holistic places, connecting
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Numerical analysis of reinforced embankment slopes made up of pozzolanic waste materials Int. J. Geo-Eng. Pub Date : 2020-11-22 Vidya N. Patil, Hemant S. Chore, Vishwas A. Sawant
The paper presents the numerical study of the bearing capacity behavior of the model footing placed on the top of reinforced embankment slopes made up of Pozzolanic waste materials such as fly ash and ground granulated blast furnace slag (GGBFS). The present investigation is aimed at studying the efficacy of the different types of reinforcement (geogrid and rubbergrid) in improving the load bearing
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Size effect characteristics of structural surfaces by improved projective covering method Int. J. Geo-Eng. Pub Date : 2020-11-19 S. J. Chen, J. P. Chang, X. G. Liu, Z. H. Li
Accurate characteristic of structural surfaces roughness at the relevant scale is very important to understand mechanical properties of rock mass discontinuities. So, a systematic investigation has been carried out to understand the effect of scale on the structural surface roughness by fractal dimension method. Firstly, considering the shortcoming of the projective covering method (PCM), we improved
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Characterization of expansive soils treated with lignosulfonate Int. J. Geo-Eng. Pub Date : 2020-11-02 Rama Vara Prasad Chavali, B. Reshmarani
The current study examines the potential of lignosulfonate to enhance the engineering behavior of two locally available expansive soils. The expansive soils were collected from Vijayawada and Amaravathi, located in the Capital Region of Andhra Pradesh, India. The soils were treated with four different percentages (0.5, 1, 2, and 4) of lignosulfonate and were allowed to interact for 7 and 28 days. A
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Creep of calcareous sand in Tunisia: effect of particle breakage at low stress level Int. J. Geo-Eng. Pub Date : 2020-10-16 Hyunwook Choo, Minhyuk Kwon, Lamia Touiti, Young-Hoon Jung
Aims/hypothesis One of the critical mechanisms determining creep in granular materials is the breakage of soil particles. This study aims at evaluating the time-dependent creep deformation of calcareous sand at low effective stress conditions. Methods K0 creep tests were performed for both calcareous and silica sands at low stresses of 65 and 120 kPa, and the results of creep tests were compared with
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Analysis of calcareous sand particle shape using fourier descriptor analysis Int. J. Geo-Eng. Pub Date : 2020-10-08 Lamia Touiti, Taesik Kim, Young-Hoon Jung
Soil particle shape analysis was conducted on two calcareous sands from Dissa and Matmata in Tunisia and one silica sand from Jumunjin in Korea using an image analysis method. This technique uses complex Fourier shape descriptors and image analysis of sand grains SEM photographs to provide accurate quantification of particle morphology and texture. The Fourier descriptors, denoted “Signature Descriptors”
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Estimation of liquefaction potential in Eco-Delta City (Busan) using different approaches with effect of fines content Int. J. Geo-Eng. Pub Date : 2020-09-03 Bahareh Bahari; Woongki Hwang; Tae-Hyung Kim; Young-Suk Song
Soil liquefaction which is a disastrous phenomenon induced by the earthquake, is widely investigated in many researches in geotechnical engineering. In this study, a SPT-N based investigation is carried out to assess the susceptibility of liquefaction in Eco-Delta city, located in the southwestern part of Busan city in South Korea. Data from 229 sites are analyzed for the earthquake of 7.5 magnitude
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Analysis of the passive earth pressure on a gravity-type anchorage for a suspension bridge Int. J. Geo-Eng. Pub Date : 2020-09-01 Hyunsung Lim; Seunghwan Seo; Sungjune Lee; Moonkyung Chung
In this study, numerical analyses have been performed for a reasonable gravity-type anchorage design. The emphasis is on evaluating the effect of the passive earth pressure for gravity-type anchorages under pullout loading. Three-dimensional FE analyses were performed for different types of bedrock and embedded depths. Based on this study, it is found that the displacement of the gravity-type anchorage
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Seismic analysis of slope considering log-spiral failure surface with numerical validation Int. J. Geo-Eng. Pub Date : 2020-08-08 Suman Hazari; Sima Ghosh; Richi Prasad Sharma
This paper presents the solution of c-φ soil slope stability problem using the pseudo-dynamic method assuming the log-spiral failure mechanism. The vertical slice analysis methodology is introduced to analyze the stability of the slope under vertical and horizontal seismic loads. The adopted pseudo-dynamic method in the present analysis considers the effect of phase difference and primary and shear
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Effect of using different approximation models to the exact Mohr–Coulomb material model in the FE simulation of Anchor Foundations in sand Int. J. Geo-Eng. Pub Date : 2020-08-04 A. S. M. Riyad; Md. Rokonuzzaman; Toshinori Sakai
Singularities in the Mohr–Coulomb (MC) yield criterion create numerical difficulties when implemented in the finite element model (FEM). In this research, a two-dimensional (2D) and a three-dimensional (3D) elasto-plastic FEM coupled with isotropic strain hardening–softening or simple strain-softening law incorporating non-associated flow rule including shear band, is used to investigate the effect
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Influence of the condition of pullout holes on the surrounding ground Int. J. Geo-Eng. Pub Date : 2020-07-09 Shuichi Kuwahara; Shinya Inazumi; Apiniti Jotisankasa; Susit Chaiprakaikeow
In recent years, removal work of existing piles has been increasing, and many pulling-out methods for existing piles are being applied. As for the present situation, there is concern that the physical characteristics of the ground will deteriorate due to the holes that remain after pulling out the existing piles (pullout holes). In addition, the filler to be injected into these pullout holes has not
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Monotonic and dynamic properties of riverbed sand and hill-slope soils of seismically active North-east India for ground engineering applications Int. J. Geo-Eng. Pub Date : 2020-07-05 Shiv Shankar Kumar; Arindam Dey; A. Murali Krishna
The stress–strain characteristics of soil under monotonic loading conditions and the dynamic properties of soils under cyclic loading are necessary for foundation engineering, ground response analysis and soil structure interaction studies. In the absence of site/region-specific properties, it is a common practice to use representative parameters based on the index properties of soil and available
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Lime treatment of a diesel-contaminated coarse-grained soil for reuse in geotechnical applications Int. J. Geo-Eng. Pub Date : 2020-06-30 Natalia de Souza Correia; Fernando Henrique Martins Portelinha; Igor Santos Mendes; Jose Wilson Batista da Silva
Potential reuse of oil-contaminated soils guidance policies are demonstrating ways to reuse these materials in engineering applications. However, the engineering properties of these materials are highly altered after contamination. Alternatively, chemical stabilization treatments can improve oil-contaminated soil properties for its reuse in geotechnical applications. This study investigates the effect
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Simplified approach to characterize anisotropic strength of granular soils Int. J. Geo-Eng. Pub Date : 2020-06-08 Quan Sun; Junxing Zheng
Experimental evidence shows that the strength of granular soils is significantly influenced by inherent cross anisotropy which cannot be properly described by isotropic failure criteria. This paper reviewed laboratory test results of various sands at different fabric directions. Based on the observations, this paper formulates the hypothesis that deposit plane creates a plane of weakness and the anisotropic
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Physical modeling and arbitrary Lagrangian–Eulerian finite element analysis of indentation of a sensitive clay by a flat-ended axisymmetrical indenter Int. J. Geo-Eng. Pub Date : 2020-05-25 Ghassan Abou-Samra; Mireille Sandrine Ewane; Vincenzo Silvestri
Because indentation tests which are used in several engineering fields allow obtaining material strength parameters in a fast, reliable and reproducible manner, the present study was initiated with the aim of finding out whether such tests could also be used in geotechnical engineering. Experimental results are obtained from undrained indentation tests performed with a rigid flat-tipped, cylindrical
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Influences of variations in the sledgehammer trajectory and collinearity of the geophone array in an MASW survey on the shear-wave velocity profile Int. J. Geo-Eng. Pub Date : 2020-04-22 Edgar Giovanny Diaz-Segura
In professional activities aimed at seismic site classification, geophysical methods based on measurements of surface waves are often used to measure the shear-wave velocity (Vs), with the MASW survey being one of the most common techniques employed for this purpose. An MASW survey is characterized by an in-field configuration that requires a relatively simple setup; however, several uncertainties
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Experimental and numerical study on the bearing capacity of encased stone columns Int. J. Geo-Eng. Pub Date : 2020-04-18 N. Hataf; N. Nabipour; A. Sadr
Stone columns have attracted considerable attention as a ground improvement techniques recently. Performance of stone columns, however, depends on confining pressure offered by the surrounding soils. In the case of very soft soils, the lateral confining pressure may be insufficient and this may lead to column bulging failure. Encapsulating the individual stone column enhances the lateral resistance
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Ant colony optimization for slope stability analysis applied to an embankment failure in eastern India Int. J. Geo-Eng. Pub Date : 2020-03-27 Mayank Mishra; Mandeep Singh Basson; Gunturi Venkata Ramana; Roberto Vassallo
The safety of road embankments is mainly assessed in the engineering practice by limit equilibrium analyses. Locating the critical slip surface of embankments and calculating the corresponding factor of safety is a crucial task. In this paper, the continuous ant colony optimisation algorithm is used to analyse the stability of slopes with non-circular slip surfaces. To illustrate the proposed procedure
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Model studies of plus and double box shaped skirted footings resting on sand Int. J. Geo-Eng. Pub Date : 2020-02-12 Tammineni Gnananandarao; Rakesh Kumar Dutta; Vishwas Nandkishor Khatri
The paper presents the investigation on the model unskirted/skirted footings (plus and the double box) on sand. Skirt depth, sand relative density, footing interface condition and skirted footing type were varied parameters. Skirt depth (Ds) varied in this investigation was from 0.25 B to 1.5 B (B, footing width). The results show that the footing geometry and the skirt increased the bearing capacity
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The influence of particle shape and mineralogy on the particle strength, breakage and compressibility Int. J. Geo-Eng. Pub Date : 2020-02-05 Xiaoyan Zhang; Beatrice A. Baudet; Ting Yao
It is widely accepted that both particle shape and mineralogy could have a great effect on the particle strength. However, due to the complexity of nature grains, it is difficult to distinguish the influence of particle shape from mineralogy. This paper shows measurements of the particle shape and mineralogy of carbonate sand, completely decomposed granite, Leighton Buzzard sand and pumice sand. The
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Seepage investigations of heterogeneous soils beneath some buildings using geophysical approaches: example from southwestern Nigeria Int. J. Geo-Eng. Pub Date : 2019-11-21 Adebayo Olayinka Salako; Abayomi Gaius Osotuyi; Adekunle Abraham Adepelumi
Buildings along the flood plain of River Osun, southwest Nigeria, are usually thought of as been a safe haven for residence over the years. But in recent times with vast (increasing) population and growing urbanization, some of the buildings currently experience structural damages not related to constructional designs but rather ground conditions around building foundations. The ground conditions (seepages
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Laboratory and numerical based analysis of floating sand columns in clayey soil Int. J. Geo-Eng. Pub Date : 2019-10-18 S. Naseer; M. Sarfraz Faiz; S. Iqbal; S. M. Jamil
The inclusion of sand columns results in enhancing the bearing capacity of clayey soil, increase the rate of consolidation, presentation of liquefaction in loose sandy soils and provide lateral resistance against the horizontal movement. This research aims at investigating the effects of floating columns in clayey soil with silty deposits by developing small scale laboratory models. The effects of
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Improvement of bearing capacity of soil by using natural geotextile Int. J. Geo-Eng. Pub Date : 2019-09-11 B. Panigrahi; P. K. Pradhan
An experimental study has been carried out to improve the bearing capacity of soils by using geotextile. In the present study geojute (gunny bags) is used as geotextile, whereas sand is used as soil media. This research presents the results of laboratory load tests on model square footings supported on reinforced sand beds. A total of 32 load tests are conducted to evaluate the effects of single layer
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Role of unsaturated soil mechanics in geotechnical engineering Int. J. Geo-Eng. Pub Date : 2019-06-13 Harianto Rahardjo; Yongmin Kim; Alfrendo Satyanaga
The understanding of unsaturated soil mechanics principles is of interest to a wide spectrum of geotechnical problems associated with soils above water table and compacted soils. This paper describes the stress state variables and constitutive equations based on the unsaturated soil mechanics principles. In addition, the basic concepts for characterization of unsaturated soils and measurements of matric
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Strong correlation between the laboratory dynamic CBR and the compaction characteristics of sandy soil Int. J. Geo-Eng. Pub Date : 2019-06-04 Dina Kuttah
Construction of earth structures involves the use of compacted soils. In roads construction quality controls like the bearing capacity of the subgrade, base and subbase layers, CBR values and compaction characteristics are primarily important. In Sweden, it has become interesting to correlate new testing parameters collected by simple tests to the conventional compaction parameters collected from modified
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On the role of geofoam density on the interface shear behavior of composite geosystems Int. J. Geo-Eng. Pub Date : 2019-05-30 Mohamed A. Meguid; Muhammad Imran Khan
Expanded polystyrene (EPS) geofoam has been increasingly used in geotechnical engineering applications to replace conventional backfill material or to reduce earth pressure on retaining and buried structures. In most of these applications, geofoam blocks are installed in direct contact with different construction material (soil, concrete, steel, wood, etc.). This results in a composite system that
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Finite element investigation and ANN-based prediction of the bearing capacity of strip footings resting on sloping ground Int. J. Geo-Eng. Pub Date : 2019-03-17 R. Acharyya
Footings placed on or near a slope, the slope face act as a finite boundary that leads to an inappropriate and inadequate development of the plastic region of failure as the foundation approaches the limit state under the applied loading. Depending upon the position of the footing and steepness of the slope, the above-mentioned phenomena might lead to considerable decrease in the bearing capacity of
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Influence of fines on the compression behaviour of decomposed volcanic rocks Int. J. Geo-Eng. Pub Date : 2019-03-16 Ismail Adeniyi Okewale
The compression behaviour of mixtures of sand with fines derived from decomposed volcanic rocks has been investigated in details. Oedometer tests were carried out on the samples of different degrees of weathering. The data show that no unique normal compression lines can be identified. The soils have medium degree of convergence and the degree of convergence is reducing with increasing fines. An attempt
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Influence of randomly mixed coir fibres and fly ash on stabilization of clayey subgrade Int. J. Geo-Eng. Pub Date : 2019-02-05 Shiva Prashanth Kumar Kodicherla; Darga Kumar Nandyala
This paper discusses the stabilization of clayey subgrade when mixed with coir fibres (CF) randomly and fly ash (FA). The tests were carried out on the locally available clay soil with different proportions of randomly mixed CF and FA. The CF and FA proportions used in the study are expressed in percentage by dry weight of soil. The CF and FA proportions used in the present study are 1%, 1.5% and 2%
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Effect of enzymes on plasticity and strength characteristics of an earthen construction material Int. J. Geo-Eng. Pub Date : 2019-02-05 Sravan Muguda; H. B. Nagaraj
In this study, a commercially available enzyme which is used popularly to improve sub-grade material for pavements was used as a potential stabilizer to improve soil properties used for earthen construction. As a preliminary study, the interaction of this enzyme with the soil was assessed by evaluating the plasticity and strength characteristics of enzyme treated soil with ageing. From the research
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Analysis of rockfall hazards along NH-15: a case study of Al-Hada road Int. J. Geo-Eng. Pub Date : 2019-01-26 Mohammed Sazid
The rock instability of granodiorite mountain rock located within a key route for the Mecca city (Al Haram) and Al-Taif (tourist place) was investigated. In this study eight, highly susceptible sites from 22 km road selected for kinematic and rockfall analysis to avoid rockfall consequences. Based on the field investigation, this mountain road is characterized by nearly vertical cut slopes with highly
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Premature failure of a major highway in southwestern Nigeria: the case of Ipele–Isua highway Int. J. Geo-Eng. Pub Date : 2018-12-16 S. O. Daramola; S. Malomo; Y. A. Asiwaju-Bello
Mineralogical, geochemical and geotechnical analyses were carried out to evaluate the contributions of geological and geotechnical properties of subgrade soils to the incidence of failure of the Ipele–Isua road, south-western Nigeria. Field observations showed that the road is in a very poor state of disrepair as major portions of the road alignment have failed. The road alignment is underlain in places
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Physical, chemical and geotechnical characterization of fly ash, bottom ash and municipal solid waste from Telangana State in India Int. J. Geo-Eng. Pub Date : 2018-12-15 Chamala Surendra Reddy; Supriya Mohanty; Rehana Shaik
Utilization of fly ash, bottom ash and municipal solid waste in the field of geotechnical engineering necessitates determination of its physical, chemical, morphological and engineering properties. This paper presents detailed physical, chemical and geotechnical characterization of fly ash, bottom ash and municipal solid waste from Telangana State in India. Fly ash and bottom ash samples were collected
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Liquid and plastic limits of clays by cone method Int. J. Geo-Eng. Pub Date : 2018-12-14 Binu Sharma; A. Sridharan
Undrained shear strength of a soil at the liquid limit water content can be considered to be around 1.7 kPa according to several researchers. Plasticity index of soils has been defined by one school of thought as a range of water content producing a 100-fold variation in their undrained shear strength. This has led to the redefinition of the plastic limit as the water content at which undrained shear
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3D numerical prediction of failure behaviour for the straight and curved parts of retaining wall according to various heights Int. J. Geo-Eng. Pub Date : 2018-12-13 Suk-Min Kong; Jong-Hyun Lee; Hyuk-Sang Jung; Yong-Joo Lee
Reinforced soil retaining walls are widely used for road and railway construction, various types of embankment, housing and industrial development, etc. with good safety and economic efficiency, and the number of studies on reinforced soil retaining walls has steadily increased. However, most research on reinforced soil retaining walls focus on two-dimensional linear parts. The behaviour of curved
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On yield stress of compacted clays Int. J. Geo-Eng. Pub Date : 2018-12-12 Zia ur Rehman; Usama Khalid; Khalid Farooq; Hassan Mujtaba
Artificial compaction is a commonly practiced ground improvement technique around the world. Yield stress is an important parameter to quantify and analyze the strength and compressibility behavior of the artificially compacted clays; such materials are indeed of practical significance in various projects, e.g., engineered landfills, clay liners, etc. The present study aims to investigate the influence
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A study on contamination of ground and surface water bodies by leachate leakage from a landfill in Bangalore, India Int. J. Geo-Eng. Pub Date : 2018-12-12 B. P. Naveen; J. Sumalatha; R. K. Malik
This paper discusses the effects of a potential leachate leakage from a municipal solid waste landfill, situated at Mavallipura, Bangalore, India, on the surrounding water bodies. The landfill area is spread over an area of about 100 acres that began accepting waste from 2005. MSW was deposited in non-engineered manner that has resulting in steep and unstable slopes, leachate accumulation within the
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Measurement of static and dynamic properties of municipal solid waste at Mavallipura landfill site, India Int. J. Geo-Eng. Pub Date : 2018-12-11 B. P. Naveen
Municipal solid waste (MSW) landfills have been widely constructed around the world for proper dispose of MSW. Geotechnical properties of MSW are difficult to determine because the heterogeneity, wide variation in particle size distribution and time dependent degradation. Knowledge of geotechnical properties of MSW is essential for the design and operation of landfills. Geotechnical properties of the
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Physical modelling of cohesive soil inherent variability: consolidation problem Int. J. Geo-Eng. Pub Date : 2018-12-10 Reza Jamshidi Chenari; Ali Taleb; Malahat Ghoreishi; Meghdad Payan
The main goal of this study is to substantiate the heterogeneous soil modelling in the laboratory and to examine the effect of spatial variability on the soil consolidation properties. For this purpose, several heterogeneous soil physical models are constructed using nine homogeneous soil clusters, which are prepared by mixing variable proportions of kaolin and bentonite at a specific water content
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Comparison of Point Estimate and Monte Carlo probabilistic methods in stability analysis of a deep excavation Int. J. Geo-Eng. Pub Date : 2018-12-05 Arash Sekhavatian; Asskar Janalizadeh Choobbasti
Geotechnical engineers have long used the lumped factor of safety approach in design of retaining walls. In recent years, uncertainty inherent in soil properties has caught more attentions from researchers, thus reliability analyses are used widely. In short, combining the probabilistic and deterministic analysis is common practice nowadays and failure probability calculated by risk analysis is a kind
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Effect of clay content on the shear strength of clay–sand mixture Int. J. Geo-Eng. Pub Date : 2018-11-28 Donghwi Kim; Boo Hyun Nam; Heejung Youn
This paper investigates the effect of clay content on the shear strength of clay–sand mixtures. Bentonite and Jumunjin sand were mixed to prepare clay–sand mixtures with varying clay contents of 5, 10, 15, 20, 25 and 30%. The shear strength of clay–sand mixture was measured using direct shear tests and angle of repose tests in dry condition. The angle of repose of the clay–sand mixture was measured
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Reinforcement of renovated slope against additional steeper cutting at the lower part Int. J. Geo-Eng. Pub Date : 2018-11-16 Chan-Kee Jung; Sang-Duk Lee
The behavior of a slope reinforced by passive piles 15 years ago was studied during removal of some passive piles, additional steeper slope cutting, and reinforcement by soil nails and anchors. Through a comparison of the measured value and numerical analysis results, it was found that the maximum lateral displacement developed at bench No. 4, which was the nearest bench to the additional steep slope
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Loading rate conditions and specimen size effect on strength and deformability of rock materials under uniaxial compression Int. J. Geo-Eng. Pub Date : 2018-11-09 Eren Komurlu
In this study, various rock and cementitious rock-like material specimens with same ratio of length to diameter and different sizes were tested under various deformation controlled loading rate (mm/min) and load controlled rate (kN/s) conditions. According to the results obtained from 93 specimens of 5 different types of rock material and 2 different rock-like materials (cement paste and a concrete
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Evaluation of compaction parameters of fine-grained soils using standard and modified efforts Int. J. Geo-Eng. Pub Date : 2018-10-12 Usama Khalid; Zia ur Rehman
Compaction characteristics of the soil have the great importance for practically achieving the desired strength, permeability and compressibility of soil during the construction. Standard compaction test (SCT) and modified compaction test (MCT) are two very famous laboratory test methods to determine the compaction characteristics of soils worldwide. Modest efforts have been made in the past to correlate
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Stability analysis and design charts for a sandy soil slope supporting an embedded strip footing Int. J. Geo-Eng. Pub Date : 2018-09-11 Emmanuel Baah-Frempong; Sanjay Kumar Shukla
In several field situations, especially in the hilly terrains, the construction of footings on slopes becomes essential. The factor of safety of a slope supporting a loaded footing on the crest is dependent on the position of the footing from the crest edge. Most studies in the past have focused on analysing the bearing capacity and settlement behaviour of a footing resting on a slope crest, but foundations
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Interface shear characteristics of dredger fill and concrete using large size direct shear test Int. J. Geo-Eng. Pub Date : 2018-09-10 Ping Yang; Shou-Bao Xue; Li Song; Ming-shi Duan
A large-size direct shear test was conducted to test the interface of dredger fill and concrete. The effect that concrete strength and the density of dredger fill have on the properties of interface is then analyzed. Digital photography was used to record soil particles of dredger fill moving near the interface, and the particle images were analyzed by particle image velocimetry technique. The results
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Numerical modeling of saturation type and lateral pressure influences on thermo-mechanical stresses caused by laser drilling in granite and limestone Int. J. Geo-Eng. Pub Date : 2018-09-06 Abdollah Dini; Morteza Ahmadi
Numerical methods for study effect of parameters on rock behaviour have increased in recent decades. Simulation is an important tool for analysis which the possibility of doing it is not feasible under experimental conditions and the possibility of analysis of thermo-mechanical stress and strain caused by the laser. In this study, the finite element method has been used to study thermal and mechanical
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Effect of number of layers on coir geotextile reinforced sand under cyclic loading Int. J. Geo-Eng. Pub Date : 2018-06-11 R. Sridhar; M. T. Prathap Kumar
The present investigation is on the behavior of coir geotextile-reinforced sandy soil foundations and to study the effect of different parameters contributing to their performance using laboratory model tests. The parameters investigated in this study included top layer spacing, number of reinforcement layers and vertical spacing between layers. The effect of coir geotextile reinforcement on the vertical
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Investigation of random inclusion of bamboo fiber on ordinary soil and its effect CBR value Int. J. Geo-Eng. Pub Date : 2018-06-07 Tonmoy Kumar Brahmachary; Md. Rokonuzzaman
Stability of any structure depends on strength properties of underground soil on which it is constructed. Structures basically transfer all the loads comes on itself directly to the ground. If the underlying soil is not stable enough to support transferred loads then various types of failure occur such as settlement of the structure, cracks and so on. To solve this issue, soil improvement is necessary
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Numerical study on bearing capacity of single stone column Int. J. Geo-Eng. Pub Date : 2018-06-04 K. S. Ng
Stone columns are an efficient ground improvement technique for treating problematic soils. The confidence in the prediction accuracy of bearing capacity remains unsatisfactory. This paper aims to investigate the bearing capacity of single stone column using three-dimensional numerical analysis. Failure modes were observed and the effect of key parameters such as column’s friction angle, undrained
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Application of geophysical approach to highway pavement failure: a case study from basement complex terrain southwestern Nigeria Int. J. Geo-Eng. Pub Date : 2018-05-23 Charles I. Adenika; Emmanuel A. Ariyibi; Musa O. Awoyemi; Adebiyi S. Adebayo; Oluwaseyi A. Dasho; Emmanuel O. Olagunju
Geophysical survey involving Schlumberger Vertical Electrical Sounding, 2-D imaging dipole–dipole technique and ground magnetic method were carried out along Ibadan-Ife Highway located in the Precambrian Basement Complex of Southwestern, Nigeria to examine the geological factors responsible for Highway pavement failure. This was with the view to detailing the subsurface geoelectric sequence, mapping
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Evaluation of the mechanical properties and critical slope parameters of mine tailings at Enyigba, South eastern, Nigeria Int. J. Geo-Eng. Pub Date : 2018-05-18 Ogbonnaya Igwe; Chidinma Chukwu
This study examines the effects of slope geometry and Geo-mechanical parameters of tailing dumps at Enyigba mine, Nigeria. Fifty-two slopes were studied, with seven sampled for laboratory analysis. Correlation matrix and principal component analysis were employed in the data interpretations. The mechanical properties of the slope materials were investigated using geotechnical tests such as sieve analysis
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