
显示样式: 排序: IF: - GO 导出
-
Dependence of Freezing Soil Heaving Properties on the Degree and Composition of Salinization Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 A.G. Alekseev
This research presents the experimental data on physical modeling of cryogenic heaving of saline soils under laboratory conditions in the external mass transfer and isothermal temperature mode. This paper also reports the regularities of frost heaving of sandy and clayey soils salinized with sodium chloride and sodium sulfate. The mechanism of the development of cryogenic heaving of saline soils is
-
Geodetic Deformation Monitoring of a Residential Building Constructed on a Sloping Site Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 Y. S. Grigor’ev, V. V. Fateev
This article presents an analysis of long-term deformation surveys of a seven-story residential building located on a site over a filled-in ravine tributary. The results of geodetic monitoring and computer simulation of the joint load of the building, its foundation slab, and the ground were used in the justification of measures necessary for ensuring accident-free operation of the building.
-
Sensitivity of High Fill Slope Stability Factors under Seismic Conditions Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 Huang Anping, Ye Shuaihua
An evaluation method based on vector similarity is introduced to determine the sensitivity of stability factors of high fill slope under seismic action in this paper. The Euclidean similarity and cosine similarity of slope stability factors are calculated. In addition, grey relational analysis method is used to calculate the case, and the three calculation results are compared. The results show that
-
Experimental Study on the Permeability of Compacted Loess Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 Y. Guo, W. Ni, Z. Kou, Y. Zhao, Y. Nie
In the western regions of China, loess soils are widely used as fill materials in the construction of highways and building foundations. The hydraulic conductivity of this fill material is a significant parameter for initial engineering designs, but currently there are a very limited number of investigations into this aspect. In this study, a series of tests on compacted loess soils was conducted to
-
Estimation of the Corrosion Activity of Cryopegs on the Example of Soil Conditions of the Yamal Peninsula Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 A. A. Shimanov, I. A. Komarov
On the basis of experimental data on the chemical composition and concentration of highly mineralized soil solutions of the Yamal Peninsula, as well as theoretical developments, including simulation of the process of cryogenic metamorphism of solutions when the temperature and pressure conditions change, a method for estimating the corrosion activity of cryopegs to materials of foundations and underground
-
Determination of Rheological Properties of Frozen Soils by Relaxation Method Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 F. S. Karpenko, R. G. Kalbergenov, V. N. Kutergin, V. P. Merzlyakov
This article discusses the possibility of using the stress relaxation method to determine rheological characteristics of frozen soils based on a multistage test scheme under triaxial compression conditions (using a stabilometer). The analysis of the test results shows that the proposed method has good application potential.
-
Use of the Lognormal Distribution for Processing the Results of Mechanical Testing of Soils Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 V. I. Sheinin
The possibility of using the methods developed in modern applied statistics for determining the lower confidence limit for the mathematical expectation of lognormal experimental values of a mechanical characteristic of soil, i.e. its ‘calculated value’, is studied. Practical considerations are given regarding the relative benefit of using the lognormal distribution in data processing as opposed to
-
Analysis of Deformation and Temperature Characteristics of High-Speed Railway Roadbed in Seasonal Frozen Regions Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 Y. Zhang, B. Sun, Pei Li, X. Liang, J. Yang
We have systematically studied the spatial and temporal variation characteristics of deformation and ground temperature based on measuring the values of corresponding data in the Harbin-Dalian high-speed railway roadbed. The regularity and non-uniformity of roadbed deformation distribution were analyzed based on the relationships between its values and structure type, development of freezing depth
-
Modeling Hydromechanical Reinforcement of Vegetation to Improve the Stability of a Shallow Slope Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 Yang Yang, Chao Su, Mingjiao Yan, Qingsong Duan
This study investigated hydromechanical reinforcement on the stability of a vegetated slope. A test of root tensile strength was conducted to assess the root cohesion. Using the 2D finite element method, we quantified the hydromechanical effects of plants on the slope stability in terms of the factor of safety (FOS) and matric suction. Our results show that plants could increase the soil suction to
-
Model of Probabilistic Analysis of Pile Capacity Based on the Extrapolation of Load-Settlement Curves Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 M. Ćosić, N. Šušić, R. Folić, B. Folić
This paper formulates a mathematical model using the extrapolation of load-settlement curves with a rational function for analyzing the capacity of piles obtained from the static load test (SLT). In preliminary analyses, the extrapolation was based on the application of a number of mathematical functions that were gradually eliminated by iterative selection and filtering. The solution was obtained
-
Local Site Effects in Definition of Seismic Design Parameters for Historical Monuments Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-21 J. Bojadjieva, V. Sheshov, K. Edip, D. Dojchinovski
Presented in this paper are investigations related to local site conditions carried out for seismic assessment of two historical structures in Macedonia: the Church of the Holy Mother of God Peribleptos dating back to the 13th Century and located in the old town of Ohrid, and the Mustafa Pasha Mosque in Skopje dating back to the 15th Century. The objective of the described procedure has been to take
-
Polymer and Composite Piles. International and Russian Experience Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-11-20 A. V. Boyarintsev
This article reviews international and Russian experience in using polymer and composite pile structures. The historical development of various pile types, their advantages and disadvantages, as well as the author’s classification of polymer and composite piles, are presented.
-
A Simple Method to Predict Tensile Strength of Gravelly Soil Using Shear Strength Indexes Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-02 Enyue Ji, Shengshui Chen, Zhongzhi Fu
The tensile strength of gravelly soil plays a decisive role in the formation or initiation of longitudinal cracks or hydraulic fracturing in the core of earth and rockfill dams. For this study, a series of uniaxial tensile tests and consolidated drained triaxial shear tests was carried out to study the relationships between the tensile strength and shear strength indexes of gravelly soils with gravel
-
Analytical Solution for a Loess Tunnel Based on a Bilinear Strength Criterion Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-02 Mingnian Wang, Yucang Dong, Li Yu
The design load of a loessal tunnel is usually calculated using the conventional Mohr-Coulomb strength criterion, which ignores the structural strength of loess and provides inaccurate calculation results. The present paper therefore proposes a bilinear strength criterion considering the structural strength characteristics of loess determined in a triaxial shear experiment. Then, using the new strength
-
Monitoring of Permafrost Foundation-Bed Soils of Low-Rise Buildings Having Unvented Underfloor Spaces Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-02 T. A. Kornilov, A. Ya. Nikiforov, M. V. Rabinovich
The present article considers the possibility of using an unvented underfloor space enclosed with heat-insulated panels for pile-supported, low-rise buildings in permafrost areas. A long-term, in-situ experiment revealed a pattern of changes occurring over time in the ambient air temperature, the temperature in the underfloor space, as well as the depthwise temperature changes of the foundation-bed
-
Calculation of Bearing Capacity of Augercast Tapered Piles in Clayey Soils Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-02 A. I. Polischuk, D. A. Chernyavskii
The article presents a new method for determining the bearing capacity of augercast tapered piles in clayey soils by considering the various factors such as the level of external load, the sequence of operations in the installation of piles, and variations in the physical and mechanical characteristics of soils in the pile space that are responsible for effective performance of piles. This method is
-
Field Test Study on Treatment of Dredged Soil with Cotton Straw Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-01 Xiaojuan Yu, Chao Liu, Fenglin Lu
A new method for treatment of dredger fill was proposed to address its low bearing capacity, high consolidation cost, and long treatment duration. In this method, cotton straw is used as both the draining and reinforcement material. Specifically, cotton straw bundles are driven into the dredged soil and vacuum preloading is then performed. Subsequently, environmentally friendly grout is poured into
-
Shear Rate Effect on Strength Characteristics of Sandy Soils Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-01 M. Beren, I. Çobanoglu, S.B. Çelik, Ö. Ündül
In this study, the effects of different shear rates during direct shear tests on variations in the strength characteristics were investigated for the sand samples of various particle size distribution. Direct shear tests were carried out at nine different shear rates ranging from 0.05 to 5 mm/min under normal stresses of 54.5, 109, and 218 kPa. Both sample groups were tested under a condition of defined
-
Stabilizing the Temperature Regime of a Frozen Foundation Bed using Thermal Insulation and Cooling Mechanisms Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-01 A. A. Plotnikov
The present article investigates the possibility of maintaining the condition of foundation-bed soils of buildings constructed in permafrost zones using vertical seasonal cooling mechanisms and effective horizontal thermal insulation to obviate the need to construct a separate cold underfloor space. The research was carried out using existing buildings in the city of Mirny in the Sakha Republic as
-
Model Test Study on Seepage of Jointed Loess Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-01 Xiaojun Liu, Chuang Lin, Xiong Zhang, Qing Kong
This paper focuses on the influence of joints on seepage capacity of a soil mass, the water infiltration range, the area of the wet zone, and water content distributions. Tests were performed using a self-designed seepage device to determine the hydraulic conductivity of loess samples with natural joints. The test results indicate that joints greatly improve the seepage capacity of a soil mass; the
-
New Approach for Active Earth Pressure Calculation on Rigid Retaining Walls with Cohesive Backfill Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-01 Yi Tang, Jiangong Chen
The variational limit equilibrium method is adopted to calculate the active earth pressure with and without tension cracks appearing. According to static equilibrium equations of sliding soil, a functional extreme-value isoperimetric model of cohesive soil is deduced in the general case of an inclined wall, sloping backfill, and uniform surcharge on the backfill surface. The active earth pressure is
-
Investigation of the Dynamics of Gas Emission from Frozen Soils with Change in Temperature and Pressure Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-01 F. S. Karpenko, V. N. Kutergin, P. I. Kotov, R. V. Sobin
The presence of a gas component is an important feature of the frozen soils structure, which is currently practically not studied by laboratory methods during engineering surveys. To assess the gas content and dynamics of gas emission from frozen soils, the authors have developed equipment and a technique for triaxial and shear testing of samples at different temperatures and stress states. As a result
-
Consolidating Waste Slurry by Vacuum Preloading with Flocculation Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-10-01 Yitian Lu, Yajun Wu, Gangqiang Kong, Kun Niu, Jinchun Chai
Anionic polyacrylamide (APAM) and quicklime are used to improve vacuum preloading of waste slurry in Shanghai, China. To investigate the influence of these reagents on waste slurry sediment consolidation, tests on laboratory-scale models with and without the reagents were conducted and the results analyzed. Sediment settling was recorded and used to calculate the water content changes during vacuum
-
Numerical Study of Skin Friction Behavior of Piles in Limestone Rock Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 A. M. Alnuaim, W. M. Hamid, A. O. Alshenawy
An effective tool for studying the behavior of the skin friction of piles in a rock formation is through a numerical analysis. Four pile load experiments were conducted on hard limestone rock samples to describe the behavior of the load transfer solely through the skin friction on reinforced concrete piles with different diameters and lengths. Finite element analysis was performed using PLAXIS 3D software
-
Problems of Engineering Investigations on Territories with Gas-Generating Soil Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 M. Yu. Abelev, I. V. Averin, D. L. Karally
The article discusses problems of engineering investigations and the structure of gas-protection objects in territories with gas-generating soil.
-
Stability Analysis and Size Optimization of Retaining Walls on Unsaturated Soil Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 N.-H. Ri, Y.-S. Ri, Y.-Ae Kim, Z. Ma, Y. Liu
This study proposes a general methodology for an elasto-plastic model for unsaturated soil and proves its feasibility through a set of experimental calculations. The method can be used to estimate the stability and optimize the size of retaining walls on unsaturated soil.
-
Modern Technologies and Problems of Ground Stabilization by Injection Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 E. S. Argal
The article discusses modern methods of the injection stabilization of rocky and dispersed soils used in industrial, civil, and hydraulic engineering construction, as well as in repair and restoration works.
-
Meso-Structure Deformation Mechanism of EPS Silt Mixed Lightweight Soil Material under Cyclic Loading Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 Y. Feng, Y. Chao, P. Zhang
This study aimed to systematically explore the meso-structure multi-phase volume deformation mechanism and the deformation characteristics relationships of EPS (expanded polystyrene sheet) silt lightweight soil between macro- and meso-structure of the complex composition silt lightweight soil under cyclic loading. A series of modified consolidation tests and numerical simulation of the typical mix
-
Multi-Particle Model of the Critical Hydraulic Gradient for Dike Piping Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 P. Ming, J. Lu, X. Cai, M. Liu, X. Chen
The failure of dikes is mostly caused by the development of piping. Whether or not piping erosion develops is mainly determined by the critical hydraulic gradient. In this paper, a multi-particle model for the critical hydraulic gradient of dike piping is derived. The model is based on the Terzaghi formula, and considers particle size distribution characteristics and the interaction between the sand
-
Relationship Between Geological Characteristics and Key Parameters of Large-Diameter EPB Shields Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 Z. Y. Wang, Y. S. Jiang, J. Wang, L. W. Dong, B. Zhang, Y. C. Xiong
On the basis of the first proposed soil layer composite ratio, a single comprehensive index calculation model of geological characteristics in the Caoqiao Tunnel, China, is established using AHP (Analytic Hierarchy Process) and WAM (weighted average method). A model of geological characteristics is then used to discriminate a number of geologically characteristic groups. The results show that the curve
-
Pile Foundations as an Efficiently Developing Direction of Foundation Engineering Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 A. L. Gotman
A brief overview on the development of theory and practice in pile foundation engineering is presented, including the main construction solutions for piles and pile foundations, methods for their vertical and horizontal loading calculation, as well as trends in the development of principles informing their design.
-
Barrier Effect of Modified Cushion on Salinity Deterioration in the Basal Sapping Zone of Earthen Sites Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 Kai Cui, Donghua Wang, Xinyue An, Li Yu, Guopeng Wu
Based on the discovery of the "natural orange soil layer" in the wall foundation of the Ming Great Wall in Huangzhong County, Xining City, northwest China, this paper reveals the mechanism behind the barrier effect of this layer on the salinity deterioration through the combination of qualitative judgment and quantitative testing. Based on this mechanism, the conventional lime soil was improved by
-
Centrifuge Model Test on the Performance of Geogrid-Reinforced and Pile-Supported Embankment Over Soft Soil Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 Suyang Feng, Riqing Xu, Kang Cheng, Jianlin Yu, Qijun Jia
We conducted a centrifugal model test to investigate the deformation and failure mode of a geogrid-reinforced and pile-supported (GRPS) embankment. The embankment filling was simulated using the incremental acceleration method, and the surcharge was subsequently applied using an inflatable airbag on the embankment. By installing different types of instruments, the displacement of the soil, the axial
-
Dynamic Response Analysis of Inhomogeneous Saturated Soil under Moving Loads Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-08-12 L. A. Wang, J. Zhao, G. Wang
The porosity, shear modulus, and dynamic permeability coefficient of saturated inhomogeneous soil changes continuously with soil depth and is described according to the power function. The governing equation of two-dimensional dynamic was established based on the theory of Biot saturated porous media to solve the governing equation by Fourier series and obtain the displacement of each point steady-state
-
Prediction of Temperature-Controlled Regimes of Foundation-Bed Soils in the Cryolithic Zone Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-23 Yu. A. Khokholov, M. V. Kaimonov
The present article proposes a mathematical model for calculating the temperature regime of foundation-bed soils for an industrial building, considering the operation of horizontal seasonal cooling mechanisms under challenging geocryological conditions. The model takes the following points into account: air temperature in the building, atmospheric air temperature, depth of placement, number of seasonal
-
The Behavior of Gravel-Soil Interface During Triaxial Testing of the Mixed Soil Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-23 B. Zheng, D. Zhang, G. Wang, Z. Chen, H. Sang, Y. Gao, Y. Liu
Through CT scanning, digital image processing, reverse engineering reconstruction, and 3D meshing, the numerical model of the mixed soil was established. On this basis, a numerical simulation of the triaxial testing was carried out. The movement of the 70 gravels was monitored and analyzed based on the proposed geometric feature point method (GFPM). The interaction between the gravels and soil during
-
Soil Shear Strength at the Structure Interface Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-23 O. N. Isaev, R. F. Sharafutdinov
The article presents the results of studies on soil shear strength at the interface of structures made of various materials. The authors propose procedures for performing direct shear tests at the soil-structure interface and determining the interface shear parameters according to cone penetration data. Recommendations for considering the type of construction material in soil-structure interaction
-
Finite Element Simulation of Rock Mechanical Properties in Rock Surrounding a Deep Tunnel with Water Leakage Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-22 F. Wang, Y. Fan, C. Guo, L. Qin, D. Hu
A finite element model is presented which simulates the tunnel construction process, and deformation and stress characteristics, in the surrounding rock during its operation stage. The pore water pressure and distribution law of leakage in the surrounding rock are calculated by considering the effect of groundwater. The results show that during the process of excavation, the surrounding rock undergoes
-
Prediction of Bearing Capacity of Driven Piles in Semi-Rocky Soils Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-22 A. B. Ponomarev, E. N. Akbulyakova, Y. V. Ofrichter
The article discusses the prediction of the bearing capacity of driven piles on argillite-like clays and sandstones of the Permian age. The methodology was developed and field tests of piles were performed; the aspects of the formation of the bearing capacity of piles are revealed; and recommendations are formulated for the design of foundations on bases composed of of argillite-like clays and sandstones
-
Acoustic Emission of Frozen Soils under Quasi-Static Mechanical and Cyclic Thermal Loading Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-22 E. A. Novikov, V. L. Shkuratnik, M. G. Zaitsev, E. A. Klementyev, D. I. Blokhin
The effects of acoustic emission (AE) in soils during freezing and thawing under cyclic thermal and quasi-static mechanical loading have been studied. The composition and characteristics of the developed instrumentation set are presented. The informative AE parameters and primary data processing approaches were justified. The acoustic emission patterns of soil material behavior under the variable thermobaric
-
Seismic Performance of Structure with Isolated Foundation Using U-Shape Steel Damper as an Isolator Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-22 A. Manchalwar, S. V. Bakre
Hysteretic devices are essential for base-isolated buildings to control the deformation in the isolation system and to dissipate the earthquake-induced energy. U-shaped steel dampers dissipate energy through plastic deformation of specially designed steel elements. This paper investigates the performance of U-shaped steel dampers for the seismic isolation system as well as comparison with lead rubber
-
Effects of Clay Minerals on Small-Strain Shear Modulus and Damping Ratio of Saturated Clay Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-22 Peng Lin, Jun-Jun Ni, Ankit Garg, Shu-Man Yu
This paper explored the impacts of montmorillonite and kaolinite (M-K) ratio as well as consolidation time on small-strain shear modulus and damping ratio of clay soils. A resonant column device was applied to the free vibration column tests. At small shear strain of 0.001%, the shear modulus and damping ratio increased by 57% and 105% respectively when the M-K ratio rose from 0.25 to 4. At higher
-
Investigation of the Influence of Foundation Deformability on Reinforced Soil Retaining Walls Using Centrifuge Model Tests Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-22 Peng Xu, Guanlu Jiang
Two reinforced soil retaining walls with full-height rigid facing were modeled in a centrifuge. One model wall was constructed on a sand foundation with a relative density of 90%, and the other was constructed on a clay foundation with a smaller compression modulus. The model walls were both constructed in three stages, and the reinforcement strain, vertical earth pressure at the base of the facing
-
Soil-Structure Dynamic Interaction under Field-Simulated Ground Motion Tests Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-20 Minzhao Chuai
To study the soil-structure dynamic interaction, field-simulated ground motion tests of a 15-storey reinforced concrete frame structure are designed and performed. The response records of the structure and ground motion near the foundation are processed and analyzed. The fixed-base natural frequencies and modal damping ratios of the superstructure are determined and compared with the results obtained
-
Water Immersion Deformation of Unsaturated and Compacted Loess Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-06-20 Chun-Jing Lai, Yan-Peng Zhu, Nan Guo
We studied the relationship of humidifying deformation and water immersion content from the unsaturated to the saturated states and analyzed the factors influencing humidifying deformation in water immersion of compacted loess. Humidification axial strain was mainly affected by deviatoric stress, and the influence was significant. We studied the deformation characteristics of compacted loess under
-
In-Situ Customization of the Helical Pile Design Procedure Using Plaxis 2D Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-20 A. G. Alekseev, S. G. Bezvolev
The present paper substantiates the relevance of the scientific and technical task of designing effective helical pile constructions under conditions of insufficient development of existing standards. An adapted computer design technique was developed on the basis of comparison and analysis of the calculation results and field tests for multi-helix helical piles in cohesive and cohesionless soils using
-
Investigation on the Working Mechanism and Structural Parameters Optimization of Multiple Ball Shaped Nodular Anchors Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-20 Chen Chen, Yuanyou Xia, Qing Ni
We performed a series of small-scale physical modeling tests on two types of multiple ball-shaped nodular underreamed anchors under vertical uplift loading conditions using transparent soil and particle image velocimetry. Three sets of numerical investigations were also carried out to study the effect of anchor structure parameters on uplift bearing capacity. The results show that a larger ball diameter
-
Geotechnical Support of Design and Construction of “Rostov-Arena” Football (Soccer) Stadium Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-20 F. F. Zekhniev, D. A. Vnukov, D. E. Razvodovskii, A. N. Nikolaev
The paper discusses specifics of R&D support of designing and constructing the foundations of the football (soccer) stadium in Rostov-on-the Don, as well as results of geotechnical monitoring during construction and operation.
-
Improving Efficiency of Arranging Offshore Cofferdams Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 V. V. Verstov, A. F. Yudina, A. N. Gaido
The paper discusses the authors-developed technology for constructing offshore waterproof steel sheet pile cofferdams for creating artificial islands. The proposed technology enables increased efficiency and reduced work completion times.
-
Use of Granulated Foam Glass Ceramics to Protect Heaving Soil from Seasonal Freezing Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 K. S. Ivanov
The effectiveness of applying granular foam glass ceramics to protect a roadbase from seasonal freezing is demonstrated. Observational results of the base temperature regime are presented along with a comparative assessment of risk zones characterizing the depth of freezing and possibility of intense frost heaving.
-
Two-Dimensional Consolidation Theory of Vacuum Preloading Combined with Electroosmosis Considering the Distribution of Soil Voltage Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 Shen Yang, Feng Jianting, Qiu Chenchen, Wu Jiawei
It is necessary to consider the influence of the actual soil voltage distribution when establishing the consolidation equation to more realistically reflect the soil consolidation conditions during the vacuum preloading and electroosmosis process. The distribution of the soil voltage is analyzed by integrating previous results with independent experimental findings. The equation for the dissipation
-
Sensitivity Analysis of Factors Affecting Stability of Cut and Fill Multistage Slope Based on Improved Grey Incidence Model Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 Shuai-hua Ye, An-ping Huang
There are many factors affecting the stability of cut and fill multistage slopes, and these factors exert different degrees of influence on slope stability. The grey incidence analysis method can be used to evaluate the sensitivity of these factors. To overcome the shortcomings of the grey incidence analysis model used in previous sensitivity analysis studies on the factors influencing slope stability
-
Experimental Study on the Influence of Granulometric and Material Compositions on Soil Rheological Properties Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 Jie Yuan, Liaoyu Ye, Guixian Hu, Fang Ying-Guang
In order to investigate the influence of granulometric and material composition on rheology, in this study an improved direct shear creep apparatus is used to conduct shear rheological tests on sandy soil samples of different granulometric compositions and water contents. Creep curves for different shear load levels, as are the average viscosity coefficients of soils based on the experimental data
-
Experimental Study on Factors Influencing the Expansive Properties of Disturbed Swelling Rock Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 Jin-Shu Wang, Guang Wu, Zhi-Ming Zhao, Lin Li, Qi Lian, Liu He
In this study the vertical swelling pressure in disturbed expansive soil was evaluated under constant-volume hydration swelling tests. The volume change during inundation was observed under two conditions: constant vertical stress at inundation and constant volume. A swelling stress-strain relationship model of compacted expansive soil is established under a one-dimensional axial load, which is related
-
Triaxial Mechanical Testing of Undisturbed Unsaturated Loess Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 Bingli Gao, Lulu Su
We investigated the strength and deformation characteristics of undisturbed unsaturated loess under different moisture content conditions. The results showed that the deviatoric stress intensity increases with the increase of confining pressure at the same moisture content and decreases with increasing moisture content at the same confining pressure. Moreover, the matric suction and the shear strength
-
Calculation of the Ultimate Resistance of the Pile Basis in Pile Groups Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 N. Z. Gotman, V. S. Alekhin
Calculation of the bearing capability of piles in a pile field, based on the calculations and tests of single piles, taking into account their interaction with each other through the soil ground, is proposed. Differences in the operation of a single pile from a pile in a group are shown. The main attention is paid to determining the dependence of the ultimate resistance of piles on the parameters of
-
Determination of the Unloading Modulus of Deformation in Dispersive Soils and Its Accounting in Designing Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 A. V. Bershov, A. Y. Mirny, A. N. Usov
The aspects of determining the moduli of unloading and reloading of dispersed soils were considered. Sample tests involving triaxial compression devices showed that these parameters depend on the stress-strain state. The ratios between the primary loading and reloading moduli accepted in design practice were significantly underestimated, which led to errors in determining the settlement of structures
-
Characteristics of Shear Strength and Deformation of Compacted Q3 Loess Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-04-19 Liu Jia-Wei, Fan Heng-Hui, Song Xin-Ye, Yang Xiu-Juan
To explore the factors affecting the shear strength of compacted loess, direct shear tests and compression tests under different moisture contents and compaction were conducted. The results show that the angle of internal friction and the cohesion of the soil depend on the moisture content and compaction. The influence of the moisture content is more significant than that of the compaction. The relationship
-
Numerical Investigation of the Three-Dimensional Performances of a Shield-Machine-Bored Tunnel in Loose Sands Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-02-24 Bin-Chen Benson Hsiung
This study first explores the impact on adjacent structures caused by a shield-machinebored tunnel in loose sand; observed displacements of structures have been reported that have rarely been examined in the past. Further, considering the difficulty of the reasonable prediction in advance of the ground convergence during tunnelling, a new method for the numerical investigation of the three-dimensional
-
Calculation of Active Earth Pressure in the Non-Limit State Based on Wedge Unit Method Soil Mech. Found. Eng. (IF 0.5) Pub Date : 2020-02-24 Yi Tang,Jiangong Chen
Based on the wedge unit method, the active earth pressure against a retaining wall in the non-limit state is studied. According to the relationship between the displacement of the retaining wall and the mobilized internal frictional angle of filling in the non-limit state obtained by earlier researchers, the influences of the internal frictional angle and the displacement ratio of the wall on the unit