Bulletin of Engineering Geology and the Environment最新文献_第3页

Apparent dip sliding mechanism of obliquely inclined bedding rockslides: A case study of the Shanyang landslide, China

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-07 DOI: 10.1007/s10064-025-04228-9

Zhaoyue Yu, Jiewei Zhan, Da Huang, Jiale Kang, Jianbing Peng

{"title":"Apparent dip sliding mechanism of obliquely inclined bedding rockslides: A case study of the Shanyang landslide, China","authors":"Zhaoyue Yu, Jiewei Zhan, Da Huang, Jiale Kang, Jianbing Peng","doi":"10.1007/s10064-025-04228-9","DOIUrl":"10.1007/s10064-025-04228-9","url":null,"abstract":"<div><p>In this study, the deadly August 12, 2015, Shanyang landslide is selected as a case study to explore the mechanical model and failure mechanism of the “apparent dip sliding” instability mode in this slope. Field engineering geological survey analysis revealed that the Shanyang landslide body comprises a driving block and a blocking block. The concepts of apparent dip sliding force and retaining-wall-like locking segments are introduced to establish a three-dimensional limit equilibrium analysis model of apparent dip sliding in the Shanyang landslide. The stability is then analyzed under conditions of long-term creep, argillization of the weak interlayer, and locking segment long-term damage. Using FLAC3D software, further analysis was conducted to determine the deformation characteristics and instability mechanisms of the apparent dip sliding in the Shanyang landslide. The results show the following: (1) During the apparent dip sliding process of the landslide, in addition to the argillization of the slip surface, the anti-sliding force of the true dip sidewall and the shear strength of the frontal locking segment are the key factors controlling the landslide. (2) The driving block first undergoes creep deformation towards the true dip direction, but the creep direction is deflected by a small angle in the NE direction affected by resistance from the frontal blocking block. (3) The cumulative damage to the locking segment of the Shanyang landslide leads to overall instability, forming a typical instability pattern of apparent dip sliding‒locking segment shear failure.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143793130","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

Exploring the impact of introducing the TRIGRS physical model into machine learning model on the rainfall-induced shallow landslide-susceptibility assessment

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-07 DOI: 10.1007/s10064-025-04229-8

Li Li, Siyu Liang, Yue Qiang, Xinlong Xu, Wenjun Yang, Tao Chen, Nanxi Chen, Xi Wang

{"title":"Exploring the impact of introducing the TRIGRS physical model into machine learning model on the rainfall-induced shallow landslide-susceptibility assessment","authors":"Li Li, Siyu Liang, Yue Qiang, Xinlong Xu, Wenjun Yang, Tao Chen, Nanxi Chen, Xi Wang","doi":"10.1007/s10064-025-04229-8","DOIUrl":"10.1007/s10064-025-04229-8","url":null,"abstract":"<div><p>Yunyang County is located in the Three Gorges Reservoir area, with high annual rainfall, and fragile geological conditions, leading to frequent geological disasters. Previous studies on rainfall-induced shallow landslide susceptibility often relied on machine learning models that depend on available data, overlooking landslide mechanisms and key topographical features, making it hard to link them to underlying processes. To resolve this challenge, this study incorporates a physical model (TRIGRS: Transient Rainfall Infiltration and Grid-Based Regional Slope-Stability Model) based on the infinite slope theory into the machine learning framework. First, we introduce a BP model and three BP coupling models combined with the AO (Aquila Optimizer), AVOA (African Vultures Optimization Algorithm), and IHAOAVOA (Improved Hybrid Aquila Optimizer and African Vultures Optimization Algorithm) to assess landslide susceptibility in Yunyang County, Chongqing. Model performance is assessed using the ROC (Receiver Operating Characteristic) curve, and the results indicate that the IHAOAVOABP exhibited the best performance. Subsequently, the safety factor (Fs), a measure of slope stability, for the study area is calculated using the TRIGRS. Finally, the TRIGRS is integrated with the BP, AOBP, AVOABP, and IHAOAVOABP models in proportions, resulting in four integrated models. The results indicate that the integrated model combining the machine learning model with TRIGRS has significantly better predictive performance than the single machine learning model. Among these, IHAOAVOABP-TR demonstrated the best performance, with its %LRclass index of 90.98%, an improvement of 10.05% over IHAOAVOABP. This research combines machine learning models with physical models to more effectively assess rainfall-induced shallow landslide susceptibility.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786364","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

Crack evolution and strength deterioration of fine-grained tailings under dry and wet cycle

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-07 DOI: 10.1007/s10064-025-04231-0

Qinglin Chen, Lilin Bao, Chao Zhang, Zugui Li, Xiaojun Wang, Guangjin Wang

{"title":"Crack evolution and strength deterioration of fine-grained tailings under dry and wet cycle","authors":"Qinglin Chen, Lilin Bao, Chao Zhang, Zugui Li, Xiaojun Wang, Guangjin Wang","doi":"10.1007/s10064-025-04231-0","DOIUrl":"10.1007/s10064-025-04231-0","url":null,"abstract":"<div><p>Affected by repeated tailings discharge and rainfall, tailings materials are constantly in a state of moisture absorption and desorption, which degrades mechanical properties of tailings. To investigate the evolution of cracks and the deterioration of strength in fine-grained tailings under dry-wet cycling conditions, direct shear tests and nuclear magnetic resonance (NMR) tests were conducted. The strength deterioration and pore structure characteristics of fine-grained tailings were analyzed. Using image processing technology, surface crack parameters of fine-grained tailings were extracted, and the crack evolution characteristics under dry-wet cycles were explored. The evolution of surface cracks can be divided into two stages: rapid crack development and steady crack development. In the rapid crack development stage, both the area and average width of the cracks decrease significantly, while the total length decreases slowly. In the steady crack development stage, the crack area and average crack width gradually decline, and the total crack length undergoes a pronounced reduction. The porosity of the tailings consistently increases due to the cycles. Cohesion and the internal friction angle of the tailings decrease exponentially with increasing porosity, and both also decrease as the number of dry-wet cycles increases. Consequently, the safety factor of the tailings dam gradually declines with increased cycling, leading to reduced dam stability and increased risk for safe operation. The research results provide certain guiding significance for the stability and long-term safe operation of tailings dams.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786634","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

Impact of oxidizing hydraulic fracturing fluids on kerogen degradation and byproduct release from organic rich marcellus shale

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-07 DOI: 10.1007/s10064-025-04236-9

Vikas Agrawal, Shikha Sharma, Shaun Donmoyer, J. Alexandra Hakala, Lauren Burrows

{"title":"Impact of oxidizing hydraulic fracturing fluids on kerogen degradation and byproduct release from organic rich marcellus shale","authors":"Vikas Agrawal, Shikha Sharma, Shaun Donmoyer, J. Alexandra Hakala, Lauren Burrows","doi":"10.1007/s10064-025-04236-9","DOIUrl":"10.1007/s10064-025-04236-9","url":null,"abstract":"<div><p>The technological advancements have led to improved utilization of organic-rich shales for energy extraction; however, low hydrocarbon (HC) recovery and declining oil and gas prices have pushed industry operators to apply new chemical additives to hydraulic fracturing fluid to increase HC production. Strong oxidizers known as breakers are added to fracturing fluids to increase HC productivity. These oxidizers can potentially degrade shale organic matter, i.e., kerogen, and improve shale permeability. However, there have been very few studies done on the byproducts released from these kerogen degradation reactions. In this study, three synthetic solutions containing oxidative breakers, sodium hypochlorite, sodium bromate, and ammonium persulfate, were reacted with kerogen extracted from Marcellus Shale for 14 days to mimic the shut-in period of a well. The type and amount of volatile organic compounds (VOCs) generated from these reactions were characterized. In addition, molecular structural parameters of kerogen extracts were characterized using <sup>13</sup>C solid-state NMR analysis before and after the reaction to understand the molecular mechanisms of these degradation reactions. Our results indicate sodium hypochlorite and sodium bromate-based hydraulic fracturing fluid can significantly degrade kerogen by 46% and 60%, respectively; however, they also lead to the release of large amounts of trihalomethanes. This study indicates that oxidative breakers could play a key role in improving the recovery of HCs; however, they also release low molecular weight hydrocarbons into the produced water that may require specialized treatment depending on the produced water end use. Strategies to remove trihalomethanes from produced water may be required when managing fluids produced from reservoirs treated with halogen-containing oxidative breakers.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786365","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

The macro and micro mechanical responses of the surrounding rock influenced by roadway contour excavation

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-04 DOI: 10.1007/s10064-025-04240-z

Hao Shi, Xing-liang Xu, Su-chuan Tian, Wei-chao Hu, Zeng-hui Li

{"title":"The macro and micro mechanical responses of the surrounding rock influenced by roadway contour excavation","authors":"Hao Shi, Xing-liang Xu, Su-chuan Tian, Wei-chao Hu, Zeng-hui Li","doi":"10.1007/s10064-025-04240-z","DOIUrl":"10.1007/s10064-025-04240-z","url":null,"abstract":"<div><p>The challenge faced by roadway excavation methods lies in minimizing disturbance to the surrounding rock while maintaining driving speed. To minimize damage to the surrounding rock during roadway excavation, this study proposes a method of unloading the roadway contour to sever the connection between the excavated target rock mass and the retained surrounding rock mass. This approach initiates the propagation of cracks within the targeted rock mass, thereby releasing internal energy to facilitate rapid excavation. Through laboratory testing of contour excavation and coupled numerical testing of PFC3D-FLAC3D, the fracture mechanism of surrounding rock in roadway contour excavation is elucidated, and the impact of geometric parameters of contour excavation on surrounding rock disturbance is examined. The findings indicate that contour excavation does not result in structural impairment to the entire coal body, but instead leads to the formation of internal macroscopic fractures. The AE parameters (RA-AF total statistics, cumulative ringing count, cumulative energy), the range of high strain field, and the degree of internal fracture of the sample all exhibit a significant decrease as the length of cyclic excavation (LCE). This is evidenced by a decrease in development depth of roof cracks from 0.43 m to 0.20 m and a 33% reduction in the number of cracks. Selecting a lower LCE has the potential to substantially mitigate the adverse effects of contour excavation on the surrounding rock mass. The inner rock mass of the excavation target exhibits a reduced contact field, leading to a noticeable deterioration in the strength of the rock mass, thereby creating favorable conditions for subsequent cutting operations. The contour excavation method has the potential to mitigate the severe damage caused by traditional roadway excavation, transforming it into a more controlled and shallow cracking process. This allows for the implementation of precise local support design.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769718","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

Entrainment-driven morphological changes in debris flow deposits by varying water content at laboratory scale 实验室尺度下不同含水量对泥石流沉积物形态变化的诱导作用

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-03 DOI: 10.1007/s10064-025-04241-y

Nikhil Kumar Pandey, Neelima Satyam

{"title":"Entrainment-driven morphological changes in debris flow deposits by varying water content at laboratory scale","authors":"Nikhil Kumar Pandey, Neelima Satyam","doi":"10.1007/s10064-025-04241-y","DOIUrl":"10.1007/s10064-025-04241-y","url":null,"abstract":"<div><p>Entrainment is crucial in shaping debris flow deposits, influencing their morphology and dynamics. Understanding deposition driven by entrainment is vital for improving hazard mitigation and sediment management strategies. This study employs a small-scale flume setup to examine the interplay between water content (w/c), sediment composition, and bed morphology on granular flow behavior. Sixteen experiments were conducted, varying w/c (20–50%) and erodible bed configurations, with deposit morphology analyzed for width, thickness, and runout length. The findings revealed distinct patterns in deposit morphology across w/c levels. At lower w/c (20–24%), deposits exhibited broad, shorter lobes with minimal scouring, forming cone-shaped structures. Moderate w/c (~ 28%) enhanced flow mobility, producing thicker deposits near the flume bed due to reduced entrainment. At higher w/c (30–50%), deposits shifted further downstream, driven by greater entrainment volumes and longer runout distances. While higher w/c levels decreased deposit thickness, they significantly widened the runout deposits, demonstrating the dual influence of w/c and entrainment. A clear relationship emerged between entrainment and flow mobility, as increased entrainment volumes widened and flattened deposits. Additionally, water content dominated entrainment in controlling deposit thickness, underscoring its critical role in sediment transport dynamics. The deposits were poorly sorted, with a distinct bedding structure akin to natural debris flows, validating the experimental setup. This study provides an efficient and scalable methodology for analyzing granular flow behavior in erodible beds. The results offer insights into sediment transport processes, bridging the gap between mesoscale experiments and real-world applications in natural hazard mitigation and geotechnical engineering.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761650","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

Mechanical response of broken surrounding rock by in-situ expansion of highway tunnel 公路隧道原位膨胀对破碎围岩的力学响应

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-03 DOI: 10.1007/s10064-025-04232-z

Hongyun Yang, Jiang Gao, Yongchao Ding, Xiang Chen, Zhi Lin, Han Wu, Yongke Wei, Longwang Xu, Zhanfeng Yang

{"title":"Mechanical response of broken surrounding rock by in-situ expansion of highway tunnel","authors":"Hongyun Yang, Jiang Gao, Yongchao Ding, Xiang Chen, Zhi Lin, Han Wu, Yongke Wei, Longwang Xu, Zhanfeng Yang","doi":"10.1007/s10064-025-04232-z","DOIUrl":"10.1007/s10064-025-04232-z","url":null,"abstract":"<div><p>Many early highway tunnels are no longer adequate for current traffic demands and require renovation. For short tunnels, in-situ expansion is a proposed solution. However, most research on tunnel construction mechanics and load calculations has focused on new tunnels, with limited studies on in-situ expansion, particularly in tunnels with fractured surrounding rock. This paper presents research using similar material models, field pressure and deformation monitoring, and surrounding rock pressure theory. Key findings indicate that removing the upper bench lining and excavating the surrounding rock on the expansion side reduces surrounding rock stress, with a more significant pressure decrease on the expansion side. The shallow surrounding rock experiences greater stress reduction than deeper strata. Field monitoring shows similar three-stage patterns (rapid change, slow change, and stability) in anchor shaft force, steel arch stress, and contact stress between the initial support and surrounding rock, stabilizing after 15 h. Stress concentrations occurred at the left and right arch shoulders, with higher stress at the left. The removal of upper bench lining and surrounding rock expansion had a significant impact on stress changes, while lower bench excavation had minimal effect on arch shoulder stress. Physical and field data showed severe damage and stress reduction at the right arch shoulder on the expansion side, causing asymmetric stress and damage distribution. The rates of perimeter rock pressure change during tunnel expansion were significantly higher than during sub-conductor excavation, indicating the substantial influence of construction steps and expansion width.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761651","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

Exploring karst caves in an urban area using surface and borehole geophysical methods

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-02 DOI: 10.1007/s10064-025-04226-x

Xiangtai Liu, Hai Liu, Xu Meng, Caide Lin, Yao Wang, Hesong Hu, Yanliang Du

{"title":"Exploring karst caves in an urban area using surface and borehole geophysical methods","authors":"Xiangtai Liu, Hai Liu, Xu Meng, Caide Lin, Yao Wang, Hesong Hu, Yanliang Du","doi":"10.1007/s10064-025-04226-x","DOIUrl":"10.1007/s10064-025-04226-x","url":null,"abstract":"<div><p>Karst-related geological disasters pose great threats to public safety. Geophysical methods for detecting geological hazards, such as electrical resistivity tomography (ERT), seismic tomography, ground penetrating radar (GPR), and borehole radar methods, have flourished in the past decades. However, the application of a single method among them has limitations in terms of probing depth, imaging resolution, and data interpretability. Therefore, to enhance detection accuracy and improve imaging resolution, selecting and combining multiple geophysical methods is indispensable before conducting a survey in a karst-affected area. In this paper, the location, boundary, and infill of a karst cave in an urban area are explored using surface and borehole geophysical methods. The experimental results demonstrate that ERT is appropriate for roughly detecting the location of the karst. The results indicate the presence of a U-shaped low-resistivity anomaly corresponds to a karst cave filled with water-bearing sand. Accordingly, locations of boreholes are determined. To further characterize the boundary and infill of a karst cave, cross-hole computer tomography (CT) of radar and seismic method is employed. The results show that the cross-hole radar CT yields superior results over the cross-hole seismic CT in characterizing a shallow soil layer and delineating the karst cave boundary. The geology of the test area is characterized by combining these geophysical findings and the drilling results. These findings provide useful information for planning underground engineering projects in urban areas.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 4","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749133","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

Research on rock mass strength using optimized discrete fracture network and bonded block numerical model

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-02 DOI: 10.1007/s10064-025-04235-w

Yabing Zhang, Jing Zhang, Jian Cui, Lijie Liu, Pengjiao Zhang, Tianhong Yang, Xinrui Liu

{"title":"Research on rock mass strength using optimized discrete fracture network and bonded block numerical model","authors":"Yabing Zhang, Jing Zhang, Jian Cui, Lijie Liu, Pengjiao Zhang, Tianhong Yang, Xinrui Liu","doi":"10.1007/s10064-025-04235-w","DOIUrl":"10.1007/s10064-025-04235-w","url":null,"abstract":"<div><p>Rock mass strength is one of the key factors related to rock mechanics research and rock engineering design. In this paper, rock mass failure is simulated using a discrete Bonded Block Model, BBM, and the rock mass strength is characterized accordingly. A set of optimization algorithms is initially developed to relocate key fractures in the Discrete Fracture Network, DFN, where the distance or intersection angle between two fractures are inappropriate to accommodate regularly sized block elements. The rock mass failure and strength are then simulated using BBM models with varied fracture orientations. Higher strength is generally captured when fractures in the rock mass are less favorable to shear sliding. Since the strength of intact rocks is mechanically stronger than the strength of the initial fractures, the higher rock mass strength results from additional failures of intact rocks. Inherent numerical uncertainties are also characterized when the BBM model is selected for characterizations of the rock mass failure and strength. The strength uncertainty is captured through calibration BBM models, and are attributed to the variations of the block distributions related to fracture accommodations. This strength uncertainty is further increased considering the weakening effects of the fractures. The research addresses several key aspects of using the BBM models for simulations of the rock mass failure, and is expected to characterize the rock mass strength in a more reliable manner.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 4","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749159","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

Implications of the degree of saturation on the mechanical behaviour of a slow-moving landslide in the Three Gorges region, China

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-02 DOI: 10.1007/s10064-025-04237-8

Miguel Cueva, Enrico Soranzo, Ahsan Saif, Shun Wang, Wei Wu

{"title":"Implications of the degree of saturation on the mechanical behaviour of a slow-moving landslide in the Three Gorges region, China","authors":"Miguel Cueva, Enrico Soranzo, Ahsan Saif, Shun Wang, Wei Wu","doi":"10.1007/s10064-025-04237-8","DOIUrl":"10.1007/s10064-025-04237-8","url":null,"abstract":"<div><p>Slow-moving landslides are typically characterised by pre-existing shear zones composed of thick, clay-rich, and mechanically weak soil layers that exhibit heightened sensitivity to changes in moisture content and hydrological conditions. These zones, often governed by variations in suction and degree of saturation, play a critical role in the stability and long-term behaviour of slow-moving landslides. In this study, we investigate the influence of the degree of saturation on the mechanical properties of shear-zone soils from a reactivated slow-moving landslide in the Three Gorges Reservoir area, China. A series of laboratory experiments, including consolidation, reversal direct shear, and ring-shear tests, were conducted on reconstituted shear-zone soil samples at varying degrees of saturation. The test results indicate that increasing the degree of saturation has a marked impact on the compressibility of the soils, with saturated samples exhibiting greater compressibility and unsaturated samples demonstrating reduced compressibility. Both shear tests indicate that higher saturation leads to a reduction in peak and residual shear strength, likely due to elevated pore water pressures and a decrease in inter-particle bonding forces. These insights emphasise the need to account for varying degrees of saturation when analysing the mechanical behaviour of slow-moving landslides, contributing to an improved understanding of their deformation patterns and failure mechanisms.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 4","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10064-025-04237-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749131","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