Acta Geotechnica最新文献

Residual-state mechanical behavior of soil–rock interface within landslide shear zones 滑坡剪切带内土石界面残余状态力学行为

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-04-01 DOI: 10.1007/s11440-025-02563-5

Xuan Kang, Shun Wang, Wei Wu, Alejandro Martinez

{"title":"Residual-state mechanical behavior of soil–rock interface within landslide shear zones","authors":"Xuan Kang, Shun Wang, Wei Wu, Alejandro Martinez","doi":"10.1007/s11440-025-02563-5","DOIUrl":"10.1007/s11440-025-02563-5","url":null,"abstract":"<div><p>Landslides developing in bedding-plane sediments are predominantly controlled by basal shear zones, where clay-rich materials localize deformation along bedrock surfaces. The mechanical behavior of shear-zone soil is further influenced by the characteristics of soil–rock interface. This paper investigates the residual strength of the soil–rock interface samples through ring shear and large-scale direct shear tests under varying stress and rate conditions. Shear zone materials from two landslides sites are paired with manufactured base and natural rock to compose the interface samples. Experimental results find that the residual strengths of shear zone materials are altered by different interfaces. At a low normal stress level, the mechanical behaviors of soils show strong dependence on surface asperities. As driven by increasing shear stress, the smooth interface sample exhibits accelerated failure progression with significant loss of resistance. The surface morphology and rheological behavior explain that the basal shearing easily occur along a relatively smooth interface, resulting weakening at high velocity and stress states.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2221 - 2236"},"PeriodicalIF":5.6,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Effects of soil saturation and suction on root reinforcement performance: pull-out experiments on six native Australian plants 土壤饱和度和吸力对根系加固性能的影响：6种澳大利亚本土植物拔除试验

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-03-27 DOI: 10.1007/s11440-025-02603-0

Jiale Zhu, Abbas El-Zein, Thomas C. T. Hubble, Guien Miao

{"title":"Effects of soil saturation and suction on root reinforcement performance: pull-out experiments on six native Australian plants","authors":"Jiale Zhu, Abbas El-Zein, Thomas C. T. Hubble, Guien Miao","doi":"10.1007/s11440-025-02603-0","DOIUrl":"10.1007/s11440-025-02603-0","url":null,"abstract":"<div><p>Improving shallow slope stability with vegetation requires an understanding of root reinforcement performance, in addition to consideration of local ecological impacts. Existing root reinforcement models have not accounted for the influence of soil water content, due to insufficient experimental evidence and theoretical understanding. In this study, the root reinforcement behaviour of six Australian native plants (<i>A. costata</i>, <i>B. integrifolia</i>, <i>E. reticulatus</i>, <i>P. incisa</i>, <i>C. citrinus</i> and <i>M. thymifolia</i>) are examined through vertical pull-out tests under various levels of volumetric water content (VWC) and suction. Additionally, this study employed two root reinforcement models to illustrate the impact of VWC on comparing the performance of these models with experimental results. The study also employs an innovative approach by making an analogy to soil nails or piles and normalising pull-out force against the peripheral surface area of root-soil bundles, defining this as pull-out stress. The results show that VWC and suction have a strong influence on reinforcement, with a roughly linear inverse relationship observed between VWC and pull-out force of root bundles recorded for all species. The pull-out stress followed a nonlinear inverse relationship with VWC and suction as the pull-out force. Furthermore, discrepancies between established-model predictions and experimental data widen with increasing VWCs. It is also found that inadequate sampling can also lead to substantial errors in estimating the actual water content of the soil. The study demonstrates that VWC and suction significantly impact root reinforcement performance, with pull-out strength decreasing as VWC increases. The study also highlights the importance of accurately recording soil water content in root reinforcement experiments and modelling.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2075 - 2092"},"PeriodicalIF":5.6,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-025-02603-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

A breakage-based discrete element study of stress relaxation in quartz sands 基于破碎的石英砂应力松弛离散元研究

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-03-21 DOI: 10.1007/s11440-025-02592-0

Jiangtao Lei, Marcos Arroyo, Matteo Oryem Ciantia, Ningning Zhang

{"title":"A breakage-based discrete element study of stress relaxation in quartz sands","authors":"Jiangtao Lei, Marcos Arroyo, Matteo Oryem Ciantia, Ningning Zhang","doi":"10.1007/s11440-025-02592-0","DOIUrl":"10.1007/s11440-025-02592-0","url":null,"abstract":"<div><p>Stress relaxation of quartz sands is simulated using a recently proposed physically based time-to-fracture discrete element method framework. The framework incorporates time-dependency through stress-corrosion-induced grain fracture. This feature is embedded into a pre-existing particle-splitting-based rough-contact crushable model. The model is calibrated to represent Fontainebleau sand, a quartz sand. A controlled on–off computational strategy is adopted to advance the simulation efficiently. Model predictions are shown to compare favourably with laboratory results in oedometric and triaxial conditions in terms of stress relaxation and relaxation rate. Grain size distribution evolution is also tracked and shown to compare well with available laboratory results. The influence of initial mobilized strength <i>q</i>/<i>q</i><sub>max</sub> on stress relaxation is recovered by the model, and explained through increased grain breakage. The simulated relaxation results are examined at the microscale and compared with those from creep experiments. The model displays the nonisochronous behaviour characteristic of sands. The relaxation tests display a state shift towards higher dilatancy conditions that may offer a possible explanation for some observations of pile set-up.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2031 - 2048"},"PeriodicalIF":5.6,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-025-02592-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Seismic behaviors of moraine-soil slope under inadequate freezing and earthquakes 不充分冻结和地震作用下冰碛土边坡的地震行为

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-03-17 DOI: 10.1007/s11440-024-02516-4

Yukai Wang, Xiaoli Liu, Quanming Li, Bo Pang, Yong Zhang, Dahai Bai, Haigang Yang

{"title":"Seismic behaviors of moraine-soil slope under inadequate freezing and earthquakes","authors":"Yukai Wang, Xiaoli Liu, Quanming Li, Bo Pang, Yong Zhang, Dahai Bai, Haigang Yang","doi":"10.1007/s11440-024-02516-4","DOIUrl":"10.1007/s11440-024-02516-4","url":null,"abstract":"<div><p>Inadequate freezing is an inevitable intermediate state in freeze–thaw cycles and an important factor affecting the seismic behavior of moraine-soil slopes along Sichuan–Tibet railway. A self-made incubator was employed to complete the inadequate freezing process of the moraine-soil slope, and serial shaking table tests on moraine-soil slopes were conducted using existing shaking table devices. A speckle analysis system and accelerometers were adopted to track the slope displacement and acceleration response, and the slope seismic behavior was revealed through the evolution characteristics of acceleration, displacement and frequency spectrum. These results show that: (1) Under inadequate freezing and earthquakes, the main change of slope dynamic characteristics is a decrease in natural frequency and an increase in damping ratio. (2) Dynamic failure process of the moraine-soil slope after inadequate freezing could be summarized into four stages: elastic deformation stage with peak acceleration less than 0.4g, brittle failure stage with peak acceleration from 0.4g to 0.8g, plastic failure stage with peak acceleration from 0.8g to 1.1g, and failure slip stage with peak acceleration greater than 1.1g. (3) Seismic behaviors of the moraine-soil slope after inadequate freezing exhibit significant frequency effects, amplitude effects, slope-surface effects and elevation effects. (4) Low temperature freezing amplifies the slope dynamic response, and the larger the freezing coefficient, the stronger the dynamic response. (5) Under inadequate freezing and earthquakes, the failure pattern of a moraine-soil slope is an overall landslide along the slip surface formed by connecting cracks, which is similar to that of a rock slope with weak slip surfaces. These results have important reference value for further researches of slope seismic behaviors along Sichuan–Tibet railway.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2497 - 2517"},"PeriodicalIF":5.6,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Three-dimensional peridynamics modeling of rock cutting considering disc cutter rolling motion 考虑盘式切割器滚动运动的岩石切割三维动力学建模

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-03-13 DOI: 10.1007/s11440-025-02595-x

Xiaonan Shang, Jian Zhou, Fushen Liu, Yicheng Jiang, Xingchuan Liao

引用次数: 0

Mechanical characteristics of assembled cable-anchored platform foundations for transmission towers under combined loads using in situ experiments and theoretical analyses 组合荷载作用下输电塔组合索锚平台基础力学特性试验与理论分析

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-03-01 DOI: 10.1007/s11440-025-02558-2

Zhi-hao Sun, Jian Ma, Qing Lü, Jia-fei Hu, Gang Xu, Xiao-zhen Fan

{"title":"Mechanical characteristics of assembled cable-anchored platform foundations for transmission towers under combined loads using in situ experiments and theoretical analyses","authors":"Zhi-hao Sun, Jian Ma, Qing Lü, Jia-fei Hu, Gang Xu, Xiao-zhen Fan","doi":"10.1007/s11440-025-02558-2","DOIUrl":"10.1007/s11440-025-02558-2","url":null,"abstract":"<div><p>More than 60% of transmission lines in China are located in mountainous regions. Therefore, transmission tower foundations experience substantial combined uplift and lateral loads. Challenges faced by existing foundations for transmission towers in mountainous areas include inadequate cost-effectiveness, lengthy construction periods, and significant impacts on the surrounding environment. This study proposes a new type of assembled cable-anchored platform foundation that offers technical advantages in terms of economic viability and environmental preservation. In situ experimental and theoretical investigations were performed to assess the feasibility of this new foundation and determine its mechanical characteristics. Two in situ experiments were conducted to evaluate the bearing capacity of the foundation at a typical mountainous site. Experimental curves showing load–displacement characteristics, anchor cable axial-force variations and subgrade earth-pressure variations were obtained. Subsequently, a theoretical force-balance model was established to evaluate the mechanical performance of the foundation under different load conditions. The in situ experimental results imply that this new type of foundation provides sufficient uplift and lateral bearing capacity. The ultimate failure of the foundation was attributed to the inadequate bearing capacity of precast reinforced concrete components. Theoretical investigations revealed that the composition of the lateral resistance in the foundation depends on the uplift load. These findings provide a reference for the design and application of assembled cable-anchored platform foundations in transmission towers.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2519 - 2539"},"PeriodicalIF":5.6,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

DEM investigation of the mechanical response of cementation-type methane hydrate-bearing sand using an improved linear parallel bond contact model 基于改进线性平行胶结接触模型的胶结型含甲烷水合物砂力学响应的DEM研究

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-02-27 DOI: 10.1007/s11440-025-02583-1

Yu Zhang, Zizhuo Tao, Jinyu Hou, Shengjie Di, Jianwei Li

{"title":"DEM investigation of the mechanical response of cementation-type methane hydrate-bearing sand using an improved linear parallel bond contact model","authors":"Yu Zhang, Zizhuo Tao, Jinyu Hou, Shengjie Di, Jianwei Li","doi":"10.1007/s11440-025-02583-1","DOIUrl":"10.1007/s11440-025-02583-1","url":null,"abstract":"<div><p>This study presents a DEM investigation of the deformation behaviors and mechanical responses of cementation-type methane hydrate-bearing sand (MHBS). An improved linear parallel bond (I-PB) contact model was proposed considering the tensile-compressive-shear bond failure mode of methane hydrate (MH) and implemented in a 2D DEM code. A specific parameter calibration procedure was established to calibrate the microparameters of the I-PB contact model. Subsequently, flexible membrane particle boundaries were employed to capture the deformation characteristics of MHBS samples, and biaxial shearing tests were conducted under varying MH saturation and confining pressure conditions. Various parameters, including stress, strain, particle displacement, bond breakage distribution, contact-force chain, etc., were analyzed to investigate the macro- and micromechanical properties of MHBS samples. The numerical simulation results indicate the following: (1) Increasing MH saturation improves the bearing capacity of the samples, while the contractancy during the initial stage of shearing and strain-softening becomes more distinct; (2) The elevated confining pressure significantly increases compressive bond breakages, thereby weakening the contribution of MH bonds to the bearing capacity of the MHBS samples. The deformation characteristics and stress–strain relationships under higher confining pressure conditions resemble those of MH-free sand (MHFS) samples. (3) The cohesion exhibited a linear increase with MH saturation, whereas no clear relationship existed between MH saturation and the internal friction angle.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2009 - 2030"},"PeriodicalIF":5.6,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

THM-modelling benchmark initiative on the effects of temperature on the disposal of heat-generating radioactive waste in clay formations 温度对粘土地层中产生热量的放射性废物处置影响的thm模拟基准倡议

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-02-25 DOI: 10.1007/s11440-024-02502-w

Eric Simo, Christophe de Lesquen, Rocio Paola Leon-Vargas, Minh-ngoc Vu, Simon Raude, Ginger El Tabbal, Arnaud Dizier, Suresh Seetharam, Asta Narkuniene, Frédéric Collin, Hangbiao Song, Antonio Gens, Fei Song, Alexandru-Bogdan Tatomir, Thomas Nagel, Jörg Buchwald

{"title":"THM-modelling benchmark initiative on the effects of temperature on the disposal of heat-generating radioactive waste in clay formations","authors":"Eric Simo, Christophe de Lesquen, Rocio Paola Leon-Vargas, Minh-ngoc Vu, Simon Raude, Ginger El Tabbal, Arnaud Dizier, Suresh Seetharam, Asta Narkuniene, Frédéric Collin, Hangbiao Song, Antonio Gens, Fei Song, Alexandru-Bogdan Tatomir, Thomas Nagel, Jörg Buchwald","doi":"10.1007/s11440-024-02502-w","DOIUrl":"10.1007/s11440-024-02502-w","url":null,"abstract":"<div><p>Understanding the thermo-hydro-mechanical (THM) behaviour of clay formations, which are being considered as potential hosts for the disposal of radioactive waste in Europe, is important for the feasibility and the safe disposal of heat-generating radioactive waste in deep geological clayey formations. To ensure the reliability of numerical models and tools used to predict the THM evolution of such systems over long periods of time, it is necessary to verify and validate these tools through benchmarking initiatives. As part of the joint European Programme on Radioactive Waste Management (EURAD), the Influence of Temperature on Clay-based Material Behaviour (HITEC) work package invited seven teams from across Europe to participate in a benchmark initiative to assess the expertise and capabilities of these teams and their numerical tools to predict THM evolution in different clay materials. The results of this benchmark showed that all teams involved were able to adequately model the THM behaviour of heat-generating repository systems in clay formations, and the tools they used can be considered verified for the solution of coupled THM equations under variable boundary conditions relevant for nuclear waste disposal.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 4","pages":"1621 - 1642"},"PeriodicalIF":5.6,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-024-02502-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Modelling the evolutionary stiffness of granular bentonite mixtures 颗粒状膨润土混合料的演化刚度模拟

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-02-25 DOI: 10.1007/s11440-025-02561-7

Vicente Navarro, Erik Tengblad, Rubén López-Vizcaíno, Joel Torres-Serra, Laura Asensio

{"title":"Modelling the evolutionary stiffness of granular bentonite mixtures","authors":"Vicente Navarro, Erik Tengblad, Rubén López-Vizcaíno, Joel Torres-Serra, Laura Asensio","doi":"10.1007/s11440-025-02561-7","DOIUrl":"10.1007/s11440-025-02561-7","url":null,"abstract":"<div><p>The multimodal and evolutive pore size distribution of granular bentonite mixtures makes it advisable to adopt a triple porosity approach for the macroscopic modelling of their hydromechanical behaviour under different water content conditions. These models must integrate the evolutive effect of compressibility of the megapores between the bentonite grains on the overall stiffness of the mixture. This work proposes a strategy for this integration which, while assuming a constant compressibility of the megaporosity, allows an evolutionary expression for the overall stiffness of the mixture to be obtained. To evaluate the scope of this proposal, the hydration of two mixtures with very different initial packing is analysed. Both analyses start from dry conditions (89 MPa suction) and end in full saturation. Therefore, their analysis requires modelling the behaviour of the granular bentonite mixture for the whole range of structural organisation it can have. It is therefore a very demanding qualification exercise in which, despite the simplicity of the proposed formulation, very satisfactory results have been obtained.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 4","pages":"1959 - 1968"},"PeriodicalIF":5.6,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-025-02561-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Backfill-geogrid interaction: insights from pullout tests and numerical simulation 回填-土工格栅相互作用：来自拉拔试验和数值模拟的见解

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-02-22 DOI: 10.1007/s11440-025-02566-2

Harshal Verma, Partha Narayan Mishra, Bappaditya Manna, David Williams

引用次数: 0