Acta Geotechnica最新文献

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Experimental investigation and image-based analysis of clay slurry consolidation with prefabricated horizontal drain 预制水平排水管粘土浆固结试验研究及图像分析
IF 5.7 1区 工程技术
Acta Geotechnica Pub Date : 2025-04-11 DOI: 10.1007/s11440-025-02608-9
Peng-Lin Li, Zhen-Yu Yin, Ding-Bao Song, Jian-Hua Yin
{"title":"Experimental investigation and image-based analysis of clay slurry consolidation with prefabricated horizontal drain","authors":"Peng-Lin Li,&nbsp;Zhen-Yu Yin,&nbsp;Ding-Bao Song,&nbsp;Jian-Hua Yin","doi":"10.1007/s11440-025-02608-9","DOIUrl":"10.1007/s11440-025-02608-9","url":null,"abstract":"<div><p>The characteristics of the consolidation facilitated by prefabricated horizontal drains (PHDs) combined with vacuum loading, and the evolution of the soil column surrounding the PHDs, which significantly affects the acceleration efficiency, remain insufficiently understood. This study conducts experimental investigations into PHD-assisted consolidation, employing an enhanced digital image correlation (DIC) technique. A novel texture seeding method for slurry, essential for DIC measurements, was developed and applied to consolidation model tests with varying PHD pave rates. Data on vacuum-discharged water reveal that the consolidation rate increases with the pave rate, albeit non-linearly. The DIC-observed plane strain fields exhibit distinct non-uniform features, with zones closer to the PHD consolidating significantly faster than other regions. The shape of the soil column observed through the DIC method is approximately elliptical, and its dimensions are characterized using empirical equations, highlighting the feasibility of optimizing PHD spacing in engineering design. The void ratio distribution was derived from strain information, validating the findings related to the soil column. Additionally, excess pore pressure distributions suggest that the effective range of vacuum transfer lies between 20 and 30 cm. Water content and undrained shear strength distributions provide key insights into the non-uniformity of PHD-improved consolidation. Further studies are recommended to quantify the optimal pave rate and the effective transfer distances of vacuum pressure and incorporate the observed soil column information into PHD-assisted consolidation analysis.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"3905 - 3927"},"PeriodicalIF":5.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-025-02608-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164525","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
Microbial interactions during carbonate biomineralization via urea hydrolysis metabolic pathway 尿素水解代谢途径中碳酸盐生物矿化过程中的微生物相互作用
IF 5.7 1区 工程技术
Acta Geotechnica Pub Date : 2025-04-11 DOI: 10.1007/s11440-025-02609-8
Shaivan H. Shivaprakash, Susan E. Burns
{"title":"Microbial interactions during carbonate biomineralization via urea hydrolysis metabolic pathway","authors":"Shaivan H. Shivaprakash,&nbsp;Susan E. Burns","doi":"10.1007/s11440-025-02609-8","DOIUrl":"10.1007/s11440-025-02609-8","url":null,"abstract":"<div><p>Due to its versatile applications, microbially induced carbonate precipitation (MICP) via urea hydrolysis has gained considerable interest in diverse fields, ranging from soil sciences, applied microbiology, geomicrobiology to civil and environmental engineering. The present study aims to elucidate the interactions by which microbial cells are mediating the MICP process. To this end, MICP soil column experiments were performed and bio-cemented samples were preserved for field emission scanning electron microscopy imaging. Our results and observations show that microbial cells act as nucleation sites for calcite crystal precipitation, often undergoing cell entombment during calcite crystal growth. However, the surviving bacterial cells present on the surface of precipitated calcite crystals interact to form a network of bacterial chains resulting in interconnectivity between different calcite crystals which directs the growth of these crystals. This growth occurs on the surface of soil particles as well as in the formation of cementation bonds at inter-particle contacts, controlling the morphology of precipitated calcite crystals, coated soil particle roughness, and stiffness of bio-cemented soil. These microbial interactions have significant influence on biologically induced mineralization processes in geomicrobiology.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"3929 - 3950"},"PeriodicalIF":5.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-025-02609-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164817","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
Effect of root volume density on the mechanical behaviour of saturated sand under drained and undrained conditions 根体积密度对排水和不排水条件下饱和砂力学特性的影响
IF 5.7 1区 工程技术
Acta Geotechnica Pub Date : 2025-04-10 DOI: 10.1007/s11440-025-02605-y
Yuanjun Jiang, Xin Xia, Xiaobo Hu, Yuanjia Zhu
{"title":"Effect of root volume density on the mechanical behaviour of saturated sand under drained and undrained conditions","authors":"Yuanjun Jiang,&nbsp;Xin Xia,&nbsp;Xiaobo Hu,&nbsp;Yuanjia Zhu","doi":"10.1007/s11440-025-02605-y","DOIUrl":"10.1007/s11440-025-02605-y","url":null,"abstract":"<div><p>To determine the effects of root volume density on the mechanical behaviour of sand, drained and undrained triaxial compression tests were conducted on sand with root volume densities of 0.8%, 1.2%, 1.6%, 2.0%, and 2.4% under different confining pressures. Higher root content formed a denser and more uniform root network in the soil, enabling more roots to mobilize tensile stress, share external loads, and limit volumetric deformation. This enhanced the root-soil composite strength, reduced volumetric strain under drained conditions, and decreased excess pore water pressure under undrained conditions. The roots made a more pronounced contribution to the soil shear strength under lower confining pressures and undrained conditions. Specifically, with increasing confining pressure, the increment in the inherent soil strength far exceeded that in the additional strength provided by the roots. Under undrained conditions, the roots enhanced the soil strength by bearing part of the external loads and preventing the development of excess pore water pressure. Furthermore, the critical state line of a root-soil composite depended on the stress path. Since roots are non-granular materials and their mechanical reinforcement effect varies under different stress paths. Additionally, the roots enhanced liquefaction resistance of the sand by raising the initial effective stress required for triggering static liquefaction and the critical state effective stress. The greater the root volume density was, the stronger the liquefaction resistance of the sand.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"3845 - 3869"},"PeriodicalIF":5.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142905","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
Analyses for failure patterns of blanket defects on initiation of backward erosion piping 反冲管道起裂时包层缺陷失效模式分析
IF 5.7 1区 工程技术
Acta Geotechnica Pub Date : 2025-04-10 DOI: 10.1007/s11440-025-02610-1
Sige Peng, Chufei Li, John D. Rice, Wu Zhang, Guanyong Luo, Hong Cao, Hong Pan
{"title":"Analyses for failure patterns of blanket defects on initiation of backward erosion piping","authors":"Sige Peng,&nbsp;Chufei Li,&nbsp;John D. Rice,&nbsp;Wu Zhang,&nbsp;Guanyong Luo,&nbsp;Hong Cao,&nbsp;Hong Pan","doi":"10.1007/s11440-025-02610-1","DOIUrl":"10.1007/s11440-025-02610-1","url":null,"abstract":"<div><p>Backward erosion piping (BEP), a critical mechanism of internal erosion in levees and dams, initiates at downstream blanket defects where hydraulic pressures exceed the resistance of cohesive soil layers. While prior studies focused on BEP with preset exits, this research investigates failure patterns under varying defect geometries and soil properties through laboratory experiments and a simplified analytical model. The model integrates defect dimensions (length, width, thickness), soil cohesion, and internal friction angle to predict three failure modes: shear, bending, and bending-shear. The model was verified by laboratory results and revealed the following: (1) the increase in soil cohesion and internal friction angle enhanced seepage resistance, but this effect diminished for defects with high length-to-thickness ratios (<i>a</i>/<i>t</i>) or width-to-thickness ratios (<i>b</i>/<i>t</i>); (2) Larger <i>a</i>/<i>t</i> or <i>b</i>/<i>t</i> ratios reduced the shear strength coefficient (<i>η</i>) exponentially, shifting failure dominance from shear to bending; and (3) the combinations of the ratio of the pressure head at the near-upstream edge and far-upstream edge to the head of the reference point (<i>ξ</i><sub>1</sub> and <i>ξ</i><sub>2</sub>) had minimal influence on failure thresholds, but transient flow conditions (e.g., sudden head surges) could bypass gradual bending deformation, triggering abrupt shear failure.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"3951 - 3972"},"PeriodicalIF":5.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163845","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
Offshore pile penetration response in soft clays: a semi-analytical solution using the combined expansion-shearing method (CESM) 软粘土中海上桩侵彻响应:膨胀-剪切联合法半解析解
IF 5.7 1区 工程技术
Acta Geotechnica Pub Date : 2025-04-09 DOI: 10.1007/s11440-025-02602-1
Liang Li, Pan Zhou, Shanghui Yang, Yi Liu, Ben He, Mingdong Wei
{"title":"Offshore pile penetration response in soft clays: a semi-analytical solution using the combined expansion-shearing method (CESM)","authors":"Liang Li,&nbsp;Pan Zhou,&nbsp;Shanghui Yang,&nbsp;Yi Liu,&nbsp;Ben He,&nbsp;Mingdong Wei","doi":"10.1007/s11440-025-02602-1","DOIUrl":"10.1007/s11440-025-02602-1","url":null,"abstract":"<div><p>Accurately predicting pile penetration in marine soft clays is crucial for effective construction, load-bearing design, and maintenance of offshore pile foundations. A semi-analytical solution employing the combined expansion-shearing method (CESM) is introduced to model pile penetration in soft clays. This method innovatively simplifies the Pile penetration into undrained cavity expansion and vertical shearing. Using the S-CLAY1S model, which incorporates the anisotropy and structure of natural soft clays, an exact semi-analytical solution was developed to describe soil behavior around the pile under undrained vertical shearing, expanding upon existing undrained cavity expansion solutions. The accuracy and innovation of the CESM were validated through the results of field tests and finite element simulations. Additionally, a comprehensive parametric study highlighted the significant impact of soil’s initial structure and stress state on pile penetration response. The study findings strongly align with theoretical calculations, field Measurements, and numerical simulations. Compared to the conventional cavity expansion method, CESM excels in resolving soil stresses at the pile shaft, albeit with a slight limitation in evaluating excess pore water pressure of soils at the pile shaft. The proposed solution considers the fundamental properties of soft clays, including their anisotropy and structural behavior, while incorporating the vertical shearing experienced by the soil during pile installation, thereby providing a simplified yet precise theoretical framework for addressing pile penetration challenges.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 7","pages":"3177 - 3200"},"PeriodicalIF":5.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-025-02602-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163546","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
Centrifuge tests on horizontal bearing characteristics of pile groups in coral sand 珊瑚砂中群桩水平承载特性的离心试验
IF 5.7 1区 工程技术
Acta Geotechnica Pub Date : 2025-04-09 DOI: 10.1007/s11440-025-02611-0
Chunyan Wang, Xiao Li, Hanlong Liu, Xuanming Ding, Guangwei Cao, Chunyong Jiang, Yuting Zhang
{"title":"Centrifuge tests on horizontal bearing characteristics of pile groups in coral sand","authors":"Chunyan Wang,&nbsp;Xiao Li,&nbsp;Hanlong Liu,&nbsp;Xuanming Ding,&nbsp;Guangwei Cao,&nbsp;Chunyong Jiang,&nbsp;Yuting Zhang","doi":"10.1007/s11440-025-02611-0","DOIUrl":"10.1007/s11440-025-02611-0","url":null,"abstract":"<div><p>Coral sand is characterized by the unique properties different from conventional sediments. To investigate the horizontal bearing characteristics of 2 × 2 pile groups in coral sand foundation, a series of centrifuge model tests were conducted, focusing on the effects of pile spacing and vertical dead loads. In this study, the load–displacement responses, bending moments, lateral deflections, and axial force variations were measured. Additionally, soil resistance, <i>p−y</i> curves, and <i>p</i>-multipliers were calculated and analyzed. Results show that increasing pile spacing from 3 to 5D and 7D enhanced the bearing capacity of the pile group by 24.7% and 77.0%, respectively. Compared to the leading pile, the rear pile exhibited reduced bending moments, increased lateral displacements, and lower soil resistance and <i>p</i>-multipliers due to pile–soil–pile interaction and the shadowing effect. Furthermore, the applied vertical dead load amplified the lateral displacement and bending moments of pile due to the <i>P−</i>Δ effect while enhancing soil resistance and increasing <i>p</i>-multipliers through vertical compression. These findings provide valuable insights for future experimental and theoretical research on pile groups in coral sand foundations.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"3973 - 3986"},"PeriodicalIF":5.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163735","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
Identification of the optimal ground motion intensity measure and input parameters for assessing liquefaction-induced lateral spreading based on the generalized additive method 基于广义加性方法的液化横向扩展评价中最佳地震动强度测度和输入参数的确定
IF 5.7 1区 工程技术
Acta Geotechnica Pub Date : 2025-04-04 DOI: 10.1007/s11440-025-02607-w
Jilei Hu, Bin Xiong, Nima Pirhadi
{"title":"Identification of the optimal ground motion intensity measure and input parameters for assessing liquefaction-induced lateral spreading based on the generalized additive method","authors":"Jilei Hu,&nbsp;Bin Xiong,&nbsp;Nima Pirhadi","doi":"10.1007/s11440-025-02607-w","DOIUrl":"10.1007/s11440-025-02607-w","url":null,"abstract":"<div><p>Seismic intensity measures (IMs) play an important role in predicting liquefaction-induced lateral spreading. Many studies identified the optimal IMs for estimating lateral spreading without considering soil and topography parameters, and their findings are based on numerical simulation. These inadequate considerations may lead to impractical and incomplete results. In this paper, therefore, a large amount of real historical data containing multiple factors is collected, in which abnormal or inappropriate data are removed. Thirty-one IMs are calculated using the bidirectional ground motion records from historical earthquake records. Based on historical field data and the corresponding 31 IMs, the optimal IM is identified according to some criteria considering soil and topography parameters including correlation, efficiency, proficiency, and sufficiency analysis. The results show that the composite acceleration intensity<i> I</i><sub><i>a</i></sub> satisfies the four criteria. Additionally, the key input parameters (including <i>I</i><sub><i>a</i></sub>) affecting lateral spreading were analyzed using the generalized additive model (GAM). The average fine content and mean grain size are proposed to be removed in the construction of models, which could significantly reduce testing costs and be more conducive to engineering applications. The proposed GAM with four input parameters, <i>I</i><sub><i>a</i></sub>, <i>T</i><sub>15</sub> (cumulative layers thickness with (<i>N</i><sub>1</sub>)<sub>60</sub> &lt; 15), <i>S</i> (Slope), and <i>W</i> (free face radio), performs the best after comparing with other machine learning methods and existing empirical models. A flowchart of GAM usage was provided to the engineers.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"3887 - 3903"},"PeriodicalIF":5.7,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142597","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
Temperature- and stress-dependent electrical responses of frozen soils 冻土的温度和应力相关电响应
IF 5.7 1区 工程技术
Acta Geotechnica Pub Date : 2025-04-03 DOI: 10.1007/s11440-025-02604-z
W. Cai, C. Zhu, W. Lein
{"title":"Temperature- and stress-dependent electrical responses of frozen soils","authors":"W. Cai,&nbsp;C. Zhu,&nbsp;W. Lein","doi":"10.1007/s11440-025-02604-z","DOIUrl":"10.1007/s11440-025-02604-z","url":null,"abstract":"<div><p>Characterisation of freezing conditions (i.e. temperature and unfrozen water content) and stress states (e.g. stress level and specific volume) is critical to evaluate the thermo-hydro-mechanical properties of frozen soils. This study aims to utilise frozen soils’ electrical responses to characterise mechanical properties and interpret the associated frost heave phenomenon and compression characteristics. Frozen soils were prepared by freezing sand and bentonite at various temperatures (i.e. −5, −10, −20 °C), in which the electrical conductivity and frost heave were monitored. A modified oedometer was thereafter utilised to conduct compression tests on frozen soils. Results showed that electrical responses were highly sensitive to soil temperature variations during freezing: electrical conductivity decreasing by 2–5 orders of magnitude in response to the temperature drop of 15–40 °C. Soil freezing characteristic curves were associated with freezing point depression phenomena, as reflected in correlations between electrical conductivity and unfrozen water content. Frozen soils exhibited sensitive electrical responses to stress changes along the loading path (e.g. electrical conductivity increased by 2–4 orders of magnitude due to stress increase from 1 to 2500 kPa); while no significant stress-dependent electrical responses were observed during unloading, likely due to the loss of electric contacts. Moreover, the preconsolidation pressure of the frozen bentonite increased by 10–60 times compared to the unfrozen bentonite because of the ice invasion mechanism. This study investigates thermomechanical couplings in frozen soils and highlights the potential applicability of electrical conductivity for monitoring thermal and stress states of frozen soils in cold regions.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"3835 - 3843"},"PeriodicalIF":5.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-025-02604-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142001","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
Hydraulic conductivity and particle size of soils: modeling and experiment 土壤的水力导电性和粒径:模型和实验
IF 5.7 1区 工程技术
Acta Geotechnica Pub Date : 2025-04-01 DOI: 10.1007/s11440-025-02581-3
Jinyang Liu, Xin Wang, Xingwei Ren
{"title":"Hydraulic conductivity and particle size of soils: modeling and experiment","authors":"Jinyang Liu,&nbsp;Xin Wang,&nbsp;Xingwei Ren","doi":"10.1007/s11440-025-02581-3","DOIUrl":"10.1007/s11440-025-02581-3","url":null,"abstract":"<div><p>The prediction of the hydraulic conductivity of fine-grained soils has garnered significant attention. Although the Kozeny–Carman (KC) equation is currently the most widely used model, it struggles to account for the effects of adsorption, electrostatic interactions, and other factors related to chemical oxidants. This study aims to enhance the applicability of the KC equation for predicting hydraulic conductivity in terms of particle size of fine-grained soils. A modified version of the KC model is proposed by introducing the concept of equivalent particle size, which incorporates the effect of water adsorbed effect. This model is evaluated by 1286 experimental data spanning over 12 orders of magnitude from this study and existing literature. Building on numerical simulations and experimental data, this study introduces two characteristic equivalent particle sizes: the critical particle size and the threshold particle size, and explicitly defines their values. The critical particle size (1.0 × 10<sup>–3</sup> mm) serves as a criterion for identifying the influence of adsorption on seepage and as a boundary for the applicability of the classical KC model. It is particularly relevant for soils with particle sizes larger than the critical value. The threshold particle size (1.0 × 10<sup>–5</sup> mm), on the other hand, represents a limiting particle size, above which water can effectively flow through the soil and the hydraulic conductivity can be tested. However, both of these two equivalent characteristic particle sizes are influenced by the thickness of the adsorbed water film, and further research is needed to determine more accurate and rational values for them.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 7","pages":"3395 - 3409"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160606","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
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,&nbsp;Shun Wang,&nbsp;Wei Wu,&nbsp;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
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