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Railway track substructure: Recent research and future directions Transp. Geotech. (IF 5.3) Pub Date : 2024-03-15 William Powrie
Rail has a vital role to play in the decarbonisation of transportation, both now and in the future. It has the potential to mitigate, but also suffers from the effects of climate change, with the ageing infrastructure on historic networks increasingly vulnerable to more frequent extremes of temperature, rainfall and storminess. If rail is to remain affordable, it is essential that we target resources
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Evolving support vector regression based on improved grey wolf optimization for predicting settlement during construction of high-filled roadbed Transp. Geotech. (IF 5.3) Pub Date : 2024-03-14 Dunwen Liu, Wanmao Zhang, Yu Tang, Bo Xie, Qi Shi, Kunpeng Cao
The reconstruction and expansion of highways have become the dominant focus of current infrastructure development. However, this process often results in significant differential settlement between the new and old roadbed, leading to various pavement issues. Machine learning methods undoubtedly provide a new approach for predicting roadbed settlement. However, most of the current research on predicting
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Enhancing clay content estimation through hybrid CatBoost-GP with model class selection Transp. Geotech. (IF 5.3) Pub Date : 2024-03-13 Weihang Chen, Xing Wan, Jianwen Ding, Tengfei Wang
Excessive soil swelling, triggered by variations in moisture content, is recognized as one of the most severe geo-hazards. Swelling Potential () is closely correlated with Clay Content (), Plasticity Index (), and Activity ( = /), which are crucial input features for prediction models. Traditional methods for determining , such as the hydrometer and pipette methods, are labor-intensive and time-consuming
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Developing two robust hybrid models for predicting tunnel deformation in squeezing prone grounds Transp. Geotech. (IF 5.3) Pub Date : 2024-03-13 Mohammad Hossein Kadkhodaei, Vahid Amirkiyaei, Ebrahim Ghasemi
The ground deformation under squeezing conditions has a considerable impact on the tunnel excavation process. In this study, we utilize a combination of particle swarm optimization (PSO) and the Entropy Weight Method (EWM) optimization algorithms to optimize the hyperparameters of Extreme Gradient Boosting (XGBoost) and Random Forest (RF) algorithms. This optimization process aims to accurately predict
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Basal stability analysis of braced excavations with flexible embedded walls in undrained clay Transp. Geotech. (IF 5.3) Pub Date : 2024-03-13 Tingzhen Tan, Maosong Huang, Zhenhao Shi
An upper bound mechanism for the basal stability analysis in non-homogeneous undrained clay is presented. The current streamline-based velocity field formulas are extended into broader forms, allowing for the deformation compatibility between the wall and the soil. The proposed mechanism, comprising three shear zones, integrates consideration of the plastic bending moment of the embedded wall. The
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Prediction and optimization of adverse responses for a highway tunnel after blasting excavation using a novel hybrid multi-objective intelligent model Transp. Geotech. (IF 5.3) Pub Date : 2024-03-11 Chuanqi Li, Jian Zhou
It is one of the main challenges of modern traffic engineering to monitor and control the adverse response of highway tunnels after blasting excavation. To that end, this paper proposes a novel hybrid multi-objective intelligent model to predict and optimize four adverse responses including tunnel roof settlement (TRS), linear overbreak (LO), underbreak area (UA), and the maximum block size (MBS) based
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Supervised intelligent prediction of shear strength of rockfill materials based on data driven and a case study Transp. Geotech. (IF 5.3) Pub Date : 2024-03-08 Chuanqi Li, Jiamin Zhang, Xiancheng Mei, Jian Zhou
The rockfill materials (RFM) are emerging and regarded waste reuse product in construction and mining engineering. In this paper, six distinctive supervised machine learning (SML) models, namely artificial neural network (ANN), extreme learning machine (ELM), random forest (RF), relevance vector regression (RVR), support vector regression (SVR), and extreme gradient boosting (XGBoost), are adopted
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Deformation characteristics of existing tunnels induced by above-crossing quasi-rectangular shield tunnel Transp. Geotech. (IF 5.3) Pub Date : 2024-03-08 Zhuofeng Li, Zhiquan Chen, Yijun Yang, Yexiang Jiang, Xiaobing Xu, Qi Hu
Quasi-rectangular shield (QRS) tunneling, a recent development in tunneling technology, offers the advantage of creating double tunnels with a single excavation. This technology causes significantly less secondary damage to the environment than traditional double shield tunneling. However, the deformation characteristics of existing tunnels caused by the QRS tunnel crossing above them are unknown.
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On the use of dispersion curves to determine the critical speed of railway tracks. Application to case studies Transp. Geotech. (IF 5.3) Pub Date : 2024-03-07 José Estaire, Inés Crespo-Chacón
Trains may reach a so-called critical speed at which, in the absence of damping, the dynamic response of the entire railway infrastructure would grow without any bound. A train will have less impact on the track the more its speed is lower than the critical speed. Therefore, in terms of track maintenance, it is of vital importance to know the critical speed along the track before its construction.
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Design of railway transition zones: a novel energy-based criterion Transp. Geotech. (IF 5.3) Pub Date : 2024-03-05 A. Jain, A.V. Metrikine, M.J.M.M. Steenbergen, K.N. Dalen van
Railway transition zones (RTZs) experience higher rates of degradation compared to open tracks, which leads to increased maintenance costs and reduced availability. Despite existing literature on railway track assessment and maintenance, effective design solutions for RTZs are still limited. Therefore, a robust design criterion is required to develop effective solutions. This paper presents a two-step
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Dynamic impact of unsupported sleepers on railway infrastructure with a coupled MBD-DEM-FDM model Transp. Geotech. (IF 5.3) Pub Date : 2024-03-05 Can Shi, Chunfa Zhao, Lifeng Xin, Junfang Wang
This paper introduced a numerical simulation model of vehicle-track-substructure system, which combines the multi-body dynamics method (MBD), the discrete element method (DEM) and the finite difference method (FDM). In this model, rail, fastener, sleeper and ballast particles were built based on the DEM by using Particle Flow Code (PFC) software, substructure (including subgrade and foundation) was
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Cyclic performance of geosynthetic-encased granular pile with tire chips and aggregates mixture in soft soil – A model study Transp. Geotech. (IF 5.3) Pub Date : 2024-03-05 N. Muni Pradeep, Suresh Kumar
The performance of encased granular piles subjected to heavy cyclic loading presents a significant concern in the current context. Meanwhile, global waste tire management poses a major challenge because it has a detrimental effect on the environment. To address both difficulties, this research utilizes recycled tire chips derived from end-of-life tires (ELTs) and substituting traditional aggregates
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Experiment on the performance of high-speed railway subgrade with tire debris mixed filling Transp. Geotech. (IF 5.3) Pub Date : 2024-03-02 Lihua Li, Shusen Zhu, Yilin Gui, Junchao Yang, Xuanyu Shen, Miao Yu
As an important component of railway track, railway subgrade bears a huge dynamic load from trains. To explore the feasibility and dynamic characteristics of mixed filling of railway subgrade soil with tire debris, a series of large-scale indoor model tests were conducted to compare and analyse the magnitude and distribution of earth pressure, and the cumulative settlement displacement of sleepers
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Preface to the Special Issue on Geotechnical asset deterioration and climate change Transp. Geotech. (IF 5.3) Pub Date : 2024-02-28 Tom Dijkstra, Stephanie Glendinning, Kevin Briggs, William Powrie
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Study on the effect of tunneling and secondary grouting on the deformation of existing pipelines in bedrock raised strata Transp. Geotech. (IF 5.3) Pub Date : 2024-02-27 Yongjie Qi, Xunjian Hu, Sijian Zhou, Jian Zhou, Gang Wei, Di Zhang
Shield crossing the bedrock raised strata easily leads to large deformation of the soil, resulting in deformation and damage of the upper pipelines. To investigate the law of pipeline deformation caused by shield underpassing in bedrock raised strata, the changes in the action range of the additional thrust of the cutter head (), the friction resistance of the shield shell (), and the additional grouting
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Field measurement and CPT-based settlement prediction of existing railway subgrade reinforced by battered helical piles with grouted shafts Transp. Geotech. (IF 5.3) Pub Date : 2024-02-24 Kang Shao, Qian Su, Kaiwen Liu, Shuisheng Yang, Ruizhe Qiu, Tengfei Wang
In order to ensure the normal operation of the existing freight railway, it is difficult to adopt the common reinforcement measures (e.g., jet grouting or deep mixing) to meet the requirements. Reinforcement of existing railway subgrade by battered helical piles can meet the normal operation requirements of existing railways. However, there is no report on the research on the reinforcement of existing
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Investigation of three-dimensional dynamic response and work area depth in heavy-haul railway subgrade based on a theoretical model Transp. Geotech. (IF 5.3) Pub Date : 2024-02-24 Yefeng Du, Xinzhuang Cui, Jianwen Hao, Xiangyang Li, Zhenhao Bao, Shengqi Zhang, Xiaoning Zhang
Extending the Biot porosity theory, a three-dimensional (3D) dynamic theoretical model coupled with a track-sleeper-ballast-unsaturated subgrade was developed. A double Fourier transform was used to derive a semi-analytic solution for the 3D dynamic response of the unsaturated subgrade of the heavy-haul railway in the frequency domain. The spatial distribution law of the dynamic stress in the unsaturated
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An index based on fracture length and aperture to predict groundwater inflow rates in tunnels excavated in fractured-rock Transp. Geotech. (IF 5.3) Pub Date : 2024-02-20 Alireza Shahbazi, Ali Saeidi, Romain Chesnaux, Alain Rouleau
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A track-independent vehicle indicator for ground-borne noise and vibration emission classification Transp. Geotech. (IF 5.3) Pub Date : 2024-02-19 E. Ntotsios, D.J. Thompson, P. Reumers, G. Degrande, P. Bouvet, B. Nélain
Ground vibration from railways is increasingly recognised as a source of annoyance to lineside residents. However, in contrast to airborne noise, there are no standard test procedures to quantify the vibration emission of trains. This is compounded by the fact that measurements of vibration are highly sensitive to the properties of the test site. Here, to help overcome this, a ‘track-independent vehicle
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A case study of resilient modulus prediction leveraging an explainable metaheuristic-based XGBoost Transp. Geotech. (IF 5.3) Pub Date : 2024-02-18 Biao He, Danial Jahed Armaghani, Markos Z. Tsoukalas, Chongchong Qi, Ramesh Murlidhar Bhatawdekar, Panagiotis G. Asteris
The resilient modulus () of pavement subgrade soils is an index describing the structural response of flexible pavement foundations. Commonly, under different conditions of confining pressures and deviatoric stresses are tested by cyclic triaxial compressive experiments. However, such experiments are elaborate, expensive, and time-consuming, so developing more flexible and efficient approaches is imperative
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Predictive models for assessment of buried pipeline response under seismic landslides in Iran Transp. Geotech. (IF 5.3) Pub Date : 2024-02-17 Reza Darvishi, Ali Lashgari, Yaser Jafarian
In seismic regions both in Iran and around the world, subterranean gas pipelines inevitably extend through high-risk areas prone to seismic landslides. The seismic landslide-pipe failure mechanism constitutes a continuum geomechanical challenge influenced by factors such as sliding mass configuration, pipe positioning relative to potential slope failure surfaces, and seismic input characteristics.
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3D-printed geocells in footing systems: A comprehensive physical and numerical studies on scaling and performance under centric and eccentric loading scenarios Transp. Geotech. (IF 5.3) Pub Date : 2024-02-15 Sarper Demirdöğen, Ayhan Gürbüz, Kaan Yünkül
The complexities of scaling have long presented challenges in applying small-scale test results of geocell-reinforced footings to field conditions in geosynthetic engineering. There has been no research that thoroughly examines the scaling of both geometry and material stiffness in geocell-reinforced footing systems although limited studies have attempted to scale geocells using alternative materials
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Investigations on wagon–track interaction and running safety with unsupported sleepers Transp. Geotech. (IF 5.3) Pub Date : 2024-02-15 Yifan Yang, Yichang Zhou, Markus Hecht
Unsupported sleeper defects are not rare for the ballasted track. Based on the status quo of the railway in Kosovo, this paper presents a study on the wagon–track interaction and running safety risk with unsupported sleepers. A three-dimensional wagon–track dynamic model is first developed and validated through a full-scale field experiment. The dynamic response features of wagon and track components
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On site fouling index assessment of ballasted layers using cone dynamic penetrometer and miniature borescope image analysis Transp. Geotech. (IF 5.3) Pub Date : 2024-02-15 Jorge Rojas Vivanco, Pierre Breul, Aurélie TALON, Miguel Angel Benz-Navarrete, Sébastien Barbier, Fabien Ranvier
Ballast characterization is a fundamental task to optimize decision-making in maintenance or renewal programs of railway tracks. For that purpose, be able to evaluate the fouling and the deterioration of the ballast are the major problem. This study aims to characterize the fouled ballast using a Lightweight dynamic cone penetrometer (LDCP) and géoendoscope test. The methodology presented consists
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Quantifying the impact of stiffness distributions on the dynamic behaviour of railway transition zones Transp. Geotech. (IF 5.3) Pub Date : 2024-02-15 Avni Jain, Yuriy Marykovskiy, Andrei V. Metrikine, Karel N. van Dalen
Railway transition zones (RTZs) are regions where abrupt track stiffness changes occur that may lead to dynamic amplifications and subsequent track deterioration. The design challenges for these zones arise due to variations in material properties in both the depth (trackbed layers composed of different materials) and longitudinal directions of the track, as well as temporal variations in mechanical
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Lower-bound shakedown solutions for transportation infrastructures subjected to moving harmonic loads: A focus on saturated subgrade support Transp. Geotech. (IF 5.3) Pub Date : 2024-02-12 Yuanxiang Lin, Jun-Jie Zheng, Hao Fang, Ru-Yi Hou, Yifan Guo
As a valuable tool, the shakedown analysis technique can be used to evaluate the long-term resilience of transportation infrastructures subjected to dynamic vehicular loads. In this paper, we introduce a 3-D analytical model that faithfully replicates the geometric complexities inherent in real-world transportation systems. Rather than utilizing the total stress field, modifications to the existing
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An improved analytical model for rainfall infiltration in embankment slope constructed with red-bed solid waste Transp. Geotech. (IF 5.3) Pub Date : 2024-02-10 Jianqing Jiang, Shilin Luo, Jin Chang, Rui Zhang
Rainfall infiltration is one of the key triggering factors of landslide in embankment slope constructed with red-bed solid waste, so rainfall infiltration analytical model plays a critical role in the landslide prediction. However, the complexity of the red-bed solid waste slope’s components has not be considered by the conventional Green-Ampt infiltration model, which has also ignored the influence
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Backcalculation of in-situ nonlinear viscoelastic properties of subgrade using a finite element-based machine learning approach Transp. Geotech. (IF 5.3) Pub Date : 2024-02-10 Haishan Fan, Fan Gu, Junhui Zhang, Junhui Peng, Jianlong Zheng
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Reliability analysis of deep pressurized tunnels excavated in the rock mass with rheological behavior Transp. Geotech. (IF 5.3) Pub Date : 2024-02-10 Milad Zaheri, Masoud Ranjbarnia, Pierpaolo Oreste.
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Study on small strain characteristics and microscopic mechanism of rice husk ash modified lime soil Transp. Geotech. (IF 5.3) Pub Date : 2024-02-10 Na Li, Shimeng Yu, Erlu Wu, Xinjiang Song, Ping Jiang, Haibo Xu, Wei Wang
As a solid waste residue from rice husk combustion, rice husk ash (RHA) has volcanic ash activity. The application of RHA in lime soil can both realize the resource utilization of solid waste and improve the performance of lime soil. In this experiment, lime soil was modified by using rice husk ash (RHA). Following this, the dynamic characteristics of rice husk ash modified lime soil (RLS) were examined
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Magnified resilient behavior of recycled aggregates due to lateral restraint of geosynthetic under cyclic loading Transp. Geotech. (IF 5.3) Pub Date : 2024-02-09 Xiaohui Sun, Xin Tang, Wuyu Zhang
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Stability assessment of slope in front of piles in tunnel-landslide systems using displacement-based methods Transp. Geotech. (IF 5.3) Pub Date : 2024-02-07 Tao Li, Gang Chen
Investigating the interaction between tunnel landslide systems and stabilizing piles is crucial for mitigating landslide motion and ensuring the protection of tunnels in tunnel engineering. This study introduces a novel approach to evaluate the stability of the pre-pile region in tunnel-landslide systems with stabilizing piles. The method relies on the Bishop method and integrates displacement method
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Performance of flooded flexible pavements: A data-driven sensitivity analysis considering soil moisture fluctuations Transp. Geotech. (IF 5.3) Pub Date : 2024-02-07 Elham Ajorlou, Sayedmasoud Mousavi, Majid Ghayoomi, Eshan V. Dave
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Mechanical performance of CRTS II slab tracks in reinforced-unreinforced transition zone in extreme heat events Transp. Geotech. (IF 5.3) Pub Date : 2024-02-06 Yang Li, Haiyan Li, Rui Zhou, Jinjie Chen, Ying Song, Kailin Cao
Anchors have been widely utilized to reinforce the CRTS II slab tracks. The mechanical performance of the tracks in the reinforced-unreinforced transition zone exposed to extreme heat waves can be very complex due to the difference in mechanical properties between the two kinds of track segments. This paper investigates the damage behavior of the tracks in the reinforced-unreinforced transition zone
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The effect of ballast moisture content and fouling index on railway track settlement Transp. Geotech. (IF 5.3) Pub Date : 2024-01-29 C. Charoenwong, D.P. Connolly, P. Alves Costa, P. Galvín, A. Romero
A primary function of railway ballast is to maintain vertical track geometry, however over time it becomes contaminated with fines which reduce its ability to free-drain. Then, in the presence of moisture, the individual particles have greater scope for rearrangement thus leading to increased track settlement. This behaviour has received limited studied from a differential settlement viewpoint despite
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Subgrade vibrations and long-term stability of an embankment-bridge transition zone in non-ballasted high-speed railway Transp. Geotech. (IF 5.3) Pub Date : 2024-02-02 Changzi Qu, Xinyu Tan, Yuanjie Xiao, Zheng Wang, Limin Wei
The current major issue of the large-scale high-speed railway networks worldwide is to maintain their long-term safe and stable operations. The sudden changes in track supporting condition in transition zones inevitably lead to deterioration under long-term high-speed train loads. Aiming at studying the long-term performance of subgrade vibrations and dynamic stability, two vibration response tests
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Investigating influencing mechanisms of under-sleeper pads on lateral resistance of ballasted railway trackbed via hybrid DEM-FDM simulations Transp. Geotech. (IF 5.3) Pub Date : 2024-02-02 Pan Tan, Yuanjie Xiao, Yu Jiang, Meng Wang, Xiaoming Wang, Chongchong Zhang, Erol Tutumluer
The under-sleeper pad (USP) is extensively used in railway track structures due to its desired damping performance. The impact of USP on the stiffness and dynamic responses of track structures was well documented in the majority of the existing studies; however, few studies focus on its influence on the lateral resistance of the ballast bed. To address this deficiency and further disclose its governing
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Characterizing the regional variation of ballast particles’ movement during the increase of local void in ballast bed Transp. Geotech. (IF 5.3) Pub Date : 2024-02-02 Haonan Xi, Longlong Fu, Shuchen Wang, Yongjia Qiu, Shunhua Zhou, Binglong Wang
Local void is usually recognized until consequent track diseases, like mud pumping, track irregularity, etc. The progressive development of local void is always together with adaptive adjustment of ballast and ballast bed, indicating a potential avenue to early recognition of local void. In this paper, the movement characteristics and contact stress distribution of ballast particles at different locations
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Attitude deviation prediction of shield tunneling machine using Time-Aware LSTM networks Transp. Geotech. (IF 5.3) Pub Date : 2024-01-28 Long Chen, Zhiyao Tian, Shunhua Zhou, Quanmei Gong, Honggui Di
In shield tunneling projects, the precise prediction and control of the shield machine's attitude is critical for quality assurance. Existing prediction methods utilize historical data to construct machine learning frameworks for forecasting future attitude deviations. However, these methods typically require data collected at uniform time intervals. In engineering practice, data collection intervals
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Development of a scaled model test method for a dynamic and continuous survey to detect variations in the lateral stability of ballasted tracks Transp. Geotech. (IF 5.3) Pub Date : 2024-02-01 Chong Xu, Takahisa Nakamura, Taishi Murakami, Kimitoshi Hayano
The buckling potential of continuously welded rails poses a significant risk for traffic accidents. This risk has become more pronounced owing to global warming. In ballasted tracks, lateral ballast resistance plays a pivotal role in counteracting rail buckling forces. Traditionally, this resistance has been assessed through single-sleeper pullout or push tests (SSPTs). However, the efficacy of SSPTs
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Centrifuge modeling of heavy masses, placed on the ground, as a vibration attenuation countermeasure for surface trains Transp. Geotech. (IF 5.3) Pub Date : 2024-02-01 Mohammad Hassan Baziar, Parisa Shahbazan
Recent studies have shown that heavy masses, sited on the ground surface, can reduce vibrations induced by surface sources. In this study, six centrifuge model tests with seven different frequencies (42 centrifuge tests in total) were conducted, for the first time, to investigate the mitigation performance of heavy masses for train-induced ground vibrations. Significant vibration reductions were observed
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Impact of rainfall on the thermal performance of geothermal permeable pavement systems Transp. Geotech. (IF 5.3) Pub Date : 2024-01-29 Xiaoying Gu, Nikolas Makasis, Guillermo A. Narsilio, Arul Arulrajah, Suksun Horpibulsuk, Guillermo A. Narsilio
Geothermal permeable pavement (GPP) systems are a nascent type of energy geo-structures. GPP combine ground-source heat pump (GSHP) systems with permeable pavements to enable the additional functionality of heating and cooling, through energy harvesting using roads alongside existing drainage controls. GPP thermal performance is relatively unknown, hence, this research focuses on the development of
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Alkali-activation of agro-industrial waste for stabilization of lateritic soils Transp. Geotech. (IF 5.3) Pub Date : 2024-01-17 Durval Párraga Morales, Rodrigo Beck Saldanha, Junior Molina Aguada, Nilo Cesar Consoli
This paper focuses on enhancing the geotechnical properties of lateritic gravelly soil (LGS) through chemical stabilization using an alkali-activated binder produced with sugarcane bagasse ash (SBA) and a sodium hydroxide (NaOH) solution. For this, mechanical strength tests, specifically unconfined compressive strength (qu), and durability tests, including accumulated loss mass (ALM) and volumetric
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Particle motion and stress response interacted with machine activity: Railroad tamping strategy Transp. Geotech. (IF 5.3) Pub Date : 2024-01-17 Yuliang Zhou, Bryan Schlake, Fabian Hansmann, Hai Huang, Bernhard Antony, Kun Zeng, Cheng Zhang
Tamping is a vital maintenance activity to correct railroad track geometry by lifting, aligning, and levelling the track. Traditional tamping practices are often rather empirical and rely heavily on operator’s experience. Railroads have learned that improper tamping parameters impact ballast stability and cause quick track geometry deterioration. The purpose of this study is to investigate the effect
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An innovative approach to continuously monitor rail track surface displacement during freezing-thawing seasons Transp. Geotech. (IF 5.3) Pub Date : 2024-01-17 Alireza Roghani, Christiane Levesque
Large differential displacement as a result of freeze–thaw cycles (FTC) is a major issue affecting the safety and performance of railway tracks constructed in cold regions. Current track monitoring methods in winter are mainly based on visual inspection and manual measurements. The frequency of FTC is expected to increase under future climate and thus it is essential for railway operators to employ
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Empirical transfer functions for foam glass aggregates insulation used in flexible pavement layered systems Transp. Geotech. (IF 5.3) Pub Date : 2024-01-17 Jean-Pascal Bilodeau, Pauline Segui, Erdrick Perez, Guy Doré
Pavement design in cold regions is challenging due to the difficult conditions of soils, humidity, and temperatures. Insulation layers have been identified as a suitable solution for these conditions. Due to their unique engineering properties, foam glass aggregates (FGAs) are a promising material for use as an insulating granular layer in pavement design. However, understanding their mechanical performance
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Seismic behavior of highway embankment reinforced with remedial countermeasures on saturated loose sandy layer Transp. Geotech. (IF 5.3) Pub Date : 2024-01-17 Chengjiong Qin, Hemanta Hazarika, Guojun Liu, Yoshifumi Kochi, Hideo Furuichi, Daisuke Matsumoto
A hybrid pile system is proposed to suppress excessive settlement and lateral spreading, which are regarded as main causes of highway embankment failure due to earthquakes. This system, combining two groups of vertical and inclined piles arranged on both sides of highway embankment slope, can be applied to existing highway embankments. In this research, a series of 1 g shaking table tests were performed
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Effect of complex climatic and wheel load conditions on resilient modulus of unsaturated subgrade soil Transp. Geotech. (IF 5.3) Pub Date : 2024-01-19 Daoju Ren, Tatsuya Ishikawa, Junling Si, Tetsuya Tokoro
Resilient modulus (Mr) is a fundamental mechanical property vital for assessing the resistance of pavement structures to cyclic vertical loads. It has played a pivotal role in pavement design and has been instrumental in predicting pavement responses and fatigue life. The Mr of subgrade soil is affected by a multitude of factors, including stress, moisture, and temperature conditions, all of which
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Economics of geotechnical asset deterioration, maintenance and renewal Transp. Geotech. (IF 5.3) Pub Date : 2024-01-19 John Armstrong, Peter Helm, John Preston, Fleur Loveridge
Transport and other infrastructure systems are supported on, adjacent to and retained by extensive systems of earthworks of varying (and increasing) age, and of variable original construction quality. These earthworks are subject to natural deterioration, which can be accelerated and complicated by the effects of climate change. The ACHILLES research program is providing improved understanding of earthworks
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Chemical stabilization of demolition wastes in pavement bases using one–part fly ash and slag based geopolymers Transp. Geotech. (IF 5.3) Pub Date : 2024-01-18 Tung Doan, Arul Arulrajah, Youli Lin, Suksun Horpibulsuk, Jian Chu, Stephen Darmawan
The stabilization of road bases is a critical part of geotechnical research for developing new methods of sustainable road construction for the future. This study evaluated the feasibility of using one-part fly ash (FA) and slag (S) based geopolymers for stabilizing construction and demolition (C&D) aggregates with major significances including reduction in landfill wastes and lower carbon output to
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Sinkhole stability chart for geotechnical investigation Transp. Geotech. (IF 5.3) Pub Date : 2024-01-17 Kyungwon Park, Moataz Soliman, Yong Je Kim, Boo Hyun Nam
Sinkholes are a common geohazard in karst areas where soluble carbonate bedrock is present. Active groundwater flow causes internal soil erosion that creates cavities in the overburden soil layer. The subsurface cavity propagates upward due to the continuous erosion process, and ultimately, they reach to the ground surface, resulting in a sudden collapse. This cover-collapse type is generally a sudden
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Humidity field for unsaturated subgrade accounting for the hydro-mechanical coupling and the difference of compactness: A simulation method Transp. Geotech. (IF 5.3) Pub Date : 2024-01-12 Junhui Zhang, Huiren Hu, Junhui Peng, Shaoping Liu
The safety and stability of road structures heavily rely on the precise assessment of subgrade humidity. However, existing methods often fall short in fully considering the coupling effect between humidity and stress states, as well as variations in compactness across different subgrade areas. In this study, a new model is proposed for simulating water migration in soil subgrade, incorporating hydro-mechanical
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Damaging effects of earth fissures on high-speed railway bridges: Insights from physical experiments and numerical simulations Transp. Geotech. (IF 5.3) Pub Date : 2024-01-09 Cong Liu, Zhaoyue Yu, Jiewei Zhan, Ming Wu, Yuemin Sun, Jianbing Peng
Earth fissure is a typical geological phenomenon related to surface rupture. With the rapid development of high-speed railways (HSRs) in recent years, earth fissure disasters pose a serious challenge to the construction and subsequent safe operation of HSRs. Here, we aimed to investigate the damaging effect of earth fissure activities on HSR bridges spanning the earth fissure zone. Taking the Shuixiu
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A multivariate model of deep slurry infiltration in slurry shield tunneling Transp. Geotech. (IF 5.3) Pub Date : 2024-01-06 Keqi Liu, Hezheng Pei, Shuhong Wang, Ze Zhang, Runsheng Yang
There are multiple factors that influence slurry infiltration processes, making it necessary to consider these factors when comprehensively analyze the process of deep slurry infiltration. Firstly, this paper proposes a theoretical model for multivariate deep slurry infiltration and introduces a control equation governing the variation of the slurry infiltration domain. This equation accurately reflects
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Study on the lateral thermal disturbances of three parallel embankments on permafrost along the Gonghe-Yushu Engineering Corridor in China Transp. Geotech. (IF 5.3) Pub Date : 2024-01-03 Binhua Hu, Long Jin, Yanhui Niu, Zhipeng Fu, Xu Li, Yuanhong Dong, Kun Yuan, Ziqiao Zhao
The mutual thermal disturbance of built structures along narrow permafrost engineering corridors has become an evident influencing factor on the thermal stability of frozen soil engineering. To analyse the mutual thermal disturbance of the built structures along a permafrost engineering corridor in the Qinghai-Tibet Plateau, three parallel permafrost embankments (along the G214 Highway and the first-
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Efficient Bayesian model updating for settlement prediction of the immersed tunnel of HZMB Transp. Geotech. (IF 5.3) Pub Date : 2023-12-30 Shu-Yu He, Sin-Chi Kuok, Cong Tang, Wan-Huan Zhou
To predict the settlement of the Hong Kong-Zhuhai-Macau Bridge (HZMB) tunnel, a physics-informed machine learning (PIML) algorithm was proposed. This method is effective in predicting total settlement with limited training data. However, its performance is poor when applied to the prediction of joint differential settlement, indicating that the commonly used physical model in the algorithm needs further
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Soil drainage clogging mechanism under vacuum preloading: A review Transp. Geotech. (IF 5.3) Pub Date : 2023-12-29 Xudong Zhang, Tianwen Huang, Yajun Wu
As a kind of weak foundation treatment method, vacuum preloading (VP) combined with prefabricated vertical drain (PVD) has been used in practical engineering successfully. The method is not only economical but also efficient. However, drainage clogging problem easily occurs in the later stage of VP and seriously impacts the efficiency of soil consolidation. Therefore, it is necessary to research how
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A mobilised bearing capacity approach to the performance-based design of unpaved roads Transp. Geotech. (IF 5.3) Pub Date : 2023-12-23 A.S. Lees, J. Han
Unpaved roads are used on low traffic or temporary roads such as for materials transport across construction sites or mines. Performance is usually expressed as a rut depth and if it becomes too large, the passage of vehicles may be hindered and repairs needed. A new design method to calculate the required aggregate thickness to avoid excessive rutting both at the surface and at subgrade level is proposed
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Evolution of rattlers under different confining pressures and its influence on shear strength Transp. Geotech. (IF 5.3) Pub Date : 2023-12-19 Tiantian Hu, Daosheng Ling, Yao Tang, Xiukai Wang, Jing Wang
In this study, Discrete Element Method simulations for consolidated drained triaxial compression tests were conducted to investigate the influence of rattlers on the shear strength of granular materials under different confining pressures ranging from 1 to 1000 kPa. The study examines the differences in shear strength between granular materials with and without rattlers and explores the external loading
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Investigation on the microstructural characteristics of lime-stabilized soil after freeze–thaw cycles Transp. Geotech. (IF 5.3) Pub Date : 2023-12-09 Jiyun Nan, Dan Chang, Jiankun Liu, Haohua Chen, Jong-Sub Lee, Sang Yeob Kim
Saline soil in Northwest China is susceptible to frequent and severe freeze–thaw cycles (FTC), resulting in railway and pavement disasters, emphasizing the need for stabilizing inadequately constructed soils. The engineering characteristics of soils can be changed after FTCs, which results from the variation of microstructure. Physisorption experiments (BET), mercury intrusion porosimetry (MIP), and