Transportation Geotechnics最新文献_第10页

A unimodal soil-water characteristic curve model for gap-graded soil based on bimodal grain-size distribution and fractal theory

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2024.101465

Yuefeng Wu , Junsheng Chen , Weidong Pan , Lingfeng Guo , Yi Shan

{"title":"A unimodal soil-water characteristic curve model for gap-graded soil based on bimodal grain-size distribution and fractal theory","authors":"Yuefeng Wu , Junsheng Chen , Weidong Pan , Lingfeng Guo , Yi Shan","doi":"10.1016/j.trgeo.2024.101465","DOIUrl":"10.1016/j.trgeo.2024.101465","url":null,"abstract":"<div><div>Soil-water characteristic curve (SWCC) is an important hydraulic property that describes the relationship between matric suction and water content in unsaturated soils. However, existing SWCC models for gap-graded soil are highly empirical and fail to account for the influence of soil physical properties on SWCC. SWCC models for continuous-graded soil don’t consider the packing between particles, which results in predictions that are inconsistent with measured data. To solve the above limitation, this study proposed a new pore capillary model considering the packing of coarse and fine-grained soils and established a unimodal SWCC model called GU (Gap-graded soil and Unimodal SWCC) for gap-graded soil based on bimodal grain-size distribution (GSD) and fractal theory. There were only two physical fitting parameters in the GU model, pore fractal dimension and maximum adsorbed water content. The new proposed GU model was verified by published measured data and compared with SAP model, a representative SWCC theoretical model for continuous-graded soil. The verification and comparison prove that SWCCs predicted by the GU model have fewer error and a more reasonable variation trend than SWCCs predicted by the SAP model for different types of gap-graded soils. Thus, this study provides a novel approach to establish the relationship between soil properties and SWCC for gap-graded soil based on soil water retention mechanisms, which is important for subsequent studies of hydraulic properties.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"50 ","pages":"Article 101465"},"PeriodicalIF":4.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on the effect of unloading rate on monotonic and cyclic behavior of fissured clay

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2024.101477

Zhiao Gao , Lingwei Kong , Xinming Li , Shuangjiao Wang , Jiacheng Deng

{"title":"Experimental study on the effect of unloading rate on monotonic and cyclic behavior of fissured clay","authors":"Zhiao Gao , Lingwei Kong , Xinming Li , Shuangjiao Wang , Jiacheng Deng","doi":"10.1016/j.trgeo.2024.101477","DOIUrl":"10.1016/j.trgeo.2024.101477","url":null,"abstract":"<div><div>Variations in excavation construction periods for fissured soil transportation engineering lead to differing unloading rates, which affect the soil’s mechanical properties. This study utilizes a triaxial testing system to conduct monotonic and cyclic loading undrained shear tests on undisturbed fissured samples as well as remolded samples subjected to three distinct unloading rates. The K0 consolidated samples are regarded as soil mass that undergoes no unloading during testing. The findings indicated that the initial unloading rate influences the reloading shear mechanical properties of undisturbed and remolded specimens. The effects of unloading rates differ between undisturbed and remolded soil, a discrepancy attributed to inherent fissures. Specifically, undisturbed soil exhibits significant damage at low unloading rates due to fissures, while remolded soil experiences strength augmentation due to compaction with decreased unloading rates. Similarly, unloading will cause a loss of strength. Structural disparities result in the monotonic loading strength of undisturbed specimens being higher than that of remolded ones. In contrast, remolded specimens demonstrate greater dynamic strength under cyclic loading, likely because fissures deform, diminishing overall dynamic strength. Subsequent microscopic analysis, utilizing SEM images, along with a discussion of macroscopic inherent fissures, elucidated the impact of unloading rate on soil damage mechanisms, advancing the understanding of fissured soil behavior post-unloading. The study of mechanical properties of fissured soil following varying unloading rates is crucial for comprehending its damage mechanism and determining post-unloading soil strength parameters, providing valuable insights for practical applications in soil engineering.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"50 ","pages":"Article 101477"},"PeriodicalIF":4.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geosynthetic stabilization of road pavements, railroads, and airfields 路面、铁路和机场的土工合成材料加固工程

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2024.101321

Erol Tutumluer , Mingu Kang , Issam I.A. Qamhia

{"title":"Geosynthetic stabilization of road pavements, railroads, and airfields","authors":"Erol Tutumluer , Mingu Kang , Issam I.A. Qamhia","doi":"10.1016/j.trgeo.2024.101321","DOIUrl":"10.1016/j.trgeo.2024.101321","url":null,"abstract":"<div><div>Geosynthetics provide sustainable alternatives for enhanced performance, durability and cost-effectiveness of road pavements, railways, and airfields. Even when the same geosynthetic products are used for constructing these different transportation facilities, an optimal approach is needed to match the properties of soils or unbound aggregate geomaterials and the geosynthetic products to establish an effective mechanical stabilization. This Proctor lecture keynote paper presents the state-of-the-practice on the transportation applications of geosynthetics, design methods, and the recent research findings on geosynthetics used in road and airfield pavements and ballasted railway tracks. The paper introduces first the transportation applications of commonly used geosynthetic products, i.e., geogrids, geotextiles, and geocells, with special emphases to subgrade restraint and unbound aggregate stabilization applications and discusses in detail the related unpaved and paved design procedures. Next, the focus is directed towards establishing a better understanding of geosynthetic mechanisms governing stabilization applications. To summarize, this keynote paper reports on two decades of developments and research findings at the University of Illinois and elsewhere on the topic of geosynthetic stabilization using the latest technologies to quantify the stiffness enhancement in the vicinity of a geosynthetic material via the bearing capacity improvement and lateral restraint mechanisms. Recent research at the University of Illinois focused on the successful use of bender element shear wave transducer technology is discussed in detail with several examples given related to the laboratory and field efforts of unbound aggregate base and railroad ballast geosynthetic stabilization including full-scale instrumentation of stabilization geosynthetics used in actual road and airfield pavements constructed in the United States.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"50 ","pages":"Article 101321"},"PeriodicalIF":4.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterising geomaterial shakedown and related deformation accumulation from cyclic triaxial tests

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2024.101455

Andrew Lees , Erol Tutumluer

{"title":"Characterising geomaterial shakedown and related deformation accumulation from cyclic triaxial tests","authors":"Andrew Lees , Erol Tutumluer","doi":"10.1016/j.trgeo.2024.101455","DOIUrl":"10.1016/j.trgeo.2024.101455","url":null,"abstract":"<div><div>Permanent deformation accumulation in soils and unbound granular materials under repetitive loading leads to surface rutting in roads and deterioration of track geometry in railways, eventually requiring costly and disruptive maintenance. Cyclic or repeated load triaxial tests are a convenient test method to characterise the permanent deformation behaviour of different soils under high numbers of load repetitions and a large volume of data is available. Existing empirical functions either take no account of shakedown, leading to an over-prediction of deformations at a high number of load cycles, or those that do take account of shakedown contain a high number of regression parameters that make them difficult to use. A simple empirical function with only one input parameter is proposed to characterise the accumulation of permanent axial strain in cyclic triaxial tests on a wide range of geomaterials undergoing shakedown deformations. It is shown to give predictions of a similar accuracy to existing functions at low numbers of load cycles and increased accuracy at high numbers of load cycles. It is shown to be applicable to soils ranging from a high plasticity clay to a rail ballast, across a range of stress states, stress history and strain levels provided that ratcheting deformations do not occur. The single input parameter has a physical meaning and is related to the permanent deformation required to reach the shakedown condition. Since the proposed function predicts the slowing rate of deformation accumulation towards shakedown not covered by the commonly-used existing functions, it could lead to more economical designs of applications involving high numbers of load repetitions. Its broad application to both coarse granular materials and fine-grained soils should streamline the design of applications involving layers of both these material types without the need to change empirical function.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"50 ","pages":"Article 101455"},"PeriodicalIF":4.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Empirical and soft computing approaches for estimation of residual friction angle of clays using toughness limit

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2024.101467

Satoru Shimobe , Eyyüb Karakan , Alper Sezer

引用次数: 0

Effect of MICP treatment on the mechanical properties of clay soils

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2025.101483

Olivier Maston , Tariq Ouahbi , Said Taibi , Ahmad El Hajjar , Leslie Sapin , Annette Esnault-Filet , Benoit Duchemin , Jean-Marie Fleureau

{"title":"Effect of MICP treatment on the mechanical properties of clay soils","authors":"Olivier Maston , Tariq Ouahbi , Said Taibi , Ahmad El Hajjar , Leslie Sapin , Annette Esnault-Filet , Benoit Duchemin , Jean-Marie Fleureau","doi":"10.1016/j.trgeo.2025.101483","DOIUrl":"10.1016/j.trgeo.2025.101483","url":null,"abstract":"<div><div>The presence of drying cracks can significantly affect soil hydromechanical behavior, which has effects on soil performance in civil engineering. One innovative approach that has received much interest in the last decade is using microbially induced calcium carbonate precipitation (MICP) for soil reinforcement and stabilization. A series of clay specimens with varying moisture levels and concentrations of cementation solution were carefully prepared. All these samples were subjected to a series of mechanical tests to assess the improvement in the clay’s mechanical characteristics. These tests covered various conditions, ranging from unsaturated to saturated states of the clays. The results showed that the strength of clays was significantly improved, and the most significant increase in mechanical strength was observed with the 1.4 M MICP solution. The precipitation of CaCO<sub>3</sub> was quantified using a calcimeter. In addition, composition analysis by X-ray diffraction and attenuated total reflectance infrared spectroscopy confirmed the presence of calcium carbonate crystals and indicated residual urea and calcium acetate.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"50 ","pages":"Article 101483"},"PeriodicalIF":4.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predicting the stress-strain behavior of gravels with a hybrid deep learning approach

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2025.101492

Duo Li , Jingmao Liu , Degao Zou , Kaiyuan Xu , Fanwei Ning , Gengyao Cui

{"title":"Predicting the stress-strain behavior of gravels with a hybrid deep learning approach","authors":"Duo Li , Jingmao Liu , Degao Zou , Kaiyuan Xu , Fanwei Ning , Gengyao Cui","doi":"10.1016/j.trgeo.2025.101492","DOIUrl":"10.1016/j.trgeo.2025.101492","url":null,"abstract":"<div><div>Large-scale datasets and efficient model algorithms are crucial foundations in Machine Learning. The prediction ability of previous approaches in determining the stress–strain characteristics of gravels is hindered by small datasets and shallow Machine Learning methods with significant limitations in model generalization and feature extraction. With this consideration, a large-scale dataset for the stress–strain–volume change curves from triaxial compression test was established. This extensive collection includes 1039 records for 312 gravel types, along with stress–strain–volume change curves and 13 influence factors related to particle properties, soil mass properties, and test conditions. Subsequently, drawing inspiration from the success of hybrid Deep Learning models in sequence prediction tasks, such as air quality prediction, a novel Deep Learning model named Res-LSTM-PiNet was proposed through ablation studies. This model integrates the capabilities of the Residual Neural Network (ResNet) for deep feature extraction and Long Short-Term Memory (LSTM) for sequence feature learning, while also incorporating prior information constraints into the loss function. The results demonstrate that the proposed model effectively captures and predicts the mechanical behaviors of softening/hardening and shrinkage/dilatancy of gravels. Compared with the traditional LSTM model, the Mean Absolute Percentage Error of Res-LSTM-PiNet in predicting the stress–strain curve is significantly reduced from 28.2% to 14.3%. This study offers effective support for predicting the stress–strain–volume change curves of gravels in the absence of experimental data.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"50 ","pages":"Article 101492"},"PeriodicalIF":4.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical modelling of the washboard phenomenon on unpaved roads

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2025.101484

Laura Ibagón , Bernardo Caicedo , Juan P. Villacreses , Álvaro Achury-Florian

{"title":"Theoretical modelling of the washboard phenomenon on unpaved roads","authors":"Laura Ibagón , Bernardo Caicedo , Juan P. Villacreses , Álvaro Achury-Florian","doi":"10.1016/j.trgeo.2025.101484","DOIUrl":"10.1016/j.trgeo.2025.101484","url":null,"abstract":"<div><div>Washboard, or corrugation, is a common phenomenon of soil deformation on unpaved roads. Undulations appear on granular material roads due to the velocity and mass of the vehicles. This work proposes a theoretical model for analysing the washboard phenomenon on unpaved roads that allows computing the soil’s permanent displacements and the forces produced by the passage of a wheel. The model uses the dynamic equilibrium, soil-bearing capacity, and macro element models based on the theory proposed by Wolf. This model was validated by comparing experimentally measured deformations and forces on a circular sandy path with an instrumented rotating wheel. A parametrical analysis was also conducted to understand the variables strongly related to the washboard phenomenon. This analysis focuses on the effect of the mechanical soil properties and the wheel velocity on the soil’s permanent displacement and contact forces. The results suggest that undulations start to form at a certain critical speed. The analysis also shows that cohesion, more than friction angle, could be important in reducing road corrugation.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"50 ","pages":"Article 101484"},"PeriodicalIF":4.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predicting ground vibrations induced by high-speed trains on the inhomogeneous soil

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2024.101461

Xiaoxin Li , Chao He , Shunhua Zhou , Jianfei Lu , Yuhao Peng

{"title":"Predicting ground vibrations induced by high-speed trains on the inhomogeneous soil","authors":"Xiaoxin Li , Chao He , Shunhua Zhou , Jianfei Lu , Yuhao Peng","doi":"10.1016/j.trgeo.2024.101461","DOIUrl":"10.1016/j.trgeo.2024.101461","url":null,"abstract":"<div><div>Ground vibrations generated by high-speed train operations have raised significant environmental concerns. Conventional methods for predicting train-induced ground vibrations typically assume that soil layers are homogeneous. However, soil layers undergo various geological processes that result in significant variability in soil properties over short spatial extents. This paper therefore proposes an efficient method for predicting ground vibrations from high-speed trains while accounting for spatial variability in soil properties. A semi-analytical deterministic model is introduced to simulate the coupled train-track-ground system. Dynamic responses of stratified soils are calculated using the thin layer method (TLM) – perfectly matched layer (PML). The TLM is employed to simulate finite-depth soil layers, while the PML is applied to account for wave attenuation in the underlying half-space. Train-induced ground vibrations in the frequency-spatial domain are calculated by analytically solving the inverse Fourier transforms with respect to the wavenumbers, leading to a high computational efficiency. The model’s accuracy is validated through comparison with existing methods. Vertical variability in soil properties is simulated using the TLM in conjunction with Karhunen-Loève (K-L) expansion. Numerical results indicate that local soil inhomogeneity can significantly impact the prediction of train-induced ground vibrations, resulting in changes in vibration levels of approximately 30 dB. As soil depth and degree of variation increase, the uncertainty in vibration predictions also increases. Therefore, it is crucial to consider soil inhomogeneity when predicting ground vibrations induced by high-speed trains.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"50 ","pages":"Article 101461"},"PeriodicalIF":4.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Embankment construction with limestone powder waste: From laboratory to full-scale implementation

IF 4.9 2区工程技术

Transportation Geotechnics Pub Date : 2025-01-01 DOI: 10.1016/j.trgeo.2024.101476

José Luis Pastor , Erick Gutierrez , Miguel Cano , Roberto Tomás , Adrián Riquelme , Takenori Hino

{"title":"Embankment construction with limestone powder waste: From laboratory to full-scale implementation","authors":"José Luis Pastor , Erick Gutierrez , Miguel Cano , Roberto Tomás , Adrián Riquelme , Takenori Hino","doi":"10.1016/j.trgeo.2024.101476","DOIUrl":"10.1016/j.trgeo.2024.101476","url":null,"abstract":"<div><div>Limestone powder waste is a by-product generated in the polishing and cutting activities of the natural stone industry. In this research, the effect of limestone powder waste as an additive, either alone or in combination with hydrated lime, on the geotechnical properties of three clayey soils has been studied. Moreover, the suitability of limestone powder waste as a standalone material for embankment construction has been assessed. The geotechnical properties were measured in the laboratory by the Proctor, free swell, CBR, unconfined compressive strength and oedometer tests. A full-scale embankment was also constructed with four different sections combining natural soil, limestone powder waste, and lime. A final section with only limestone powder was also constructed. The strength and deformability of these sections were assessed by the plate load test, the dynamic probe test and the footprint test. The laboratory test results indicate a general improvement in the strength and deformability of the soil when mixed with limestone powder waste. The strength increased by up to 88%, while the deformation was reduced by 32% when the by-product was added to the natural soil. When added to the soil and lime samples the strength increased by up to 59% and the deformation was reduced by 15%. The <em>in-situ</em> tests confirmed a reduction in deformability of up to 83% and an increase in soil strength when the by-product was added. Finally, the section with only limestone powder showed less deformability than the others, indicating that this by-product can be used for road embankment construction.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"50 ","pages":"Article 101476"},"PeriodicalIF":4.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0