Bulletin of Engineering Geology and the Environment最新文献_第6页

Energy evolution characteristic and fracturing mechanism of roadway soft rock under multilevel static-dynamic coupling disturbance loading 多级动静耦合扰动加载下巷道软岩能量演化特征及破裂机理

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-29 DOI: 10.1007/s10064-025-04423-8

Ruyi Cheng, Hu He, Liyu Yu, Lihua Hu, Minghe Ju, Dongyang Wu

{"title":"Energy evolution characteristic and fracturing mechanism of roadway soft rock under multilevel static-dynamic coupling disturbance loading","authors":"Ruyi Cheng, Hu He, Liyu Yu, Lihua Hu, Minghe Ju, Dongyang Wu","doi":"10.1007/s10064-025-04423-8","DOIUrl":"10.1007/s10064-025-04423-8","url":null,"abstract":"<div><p>Roadway excavation and coal seam mining-induced strata pressure disturbances will impose a complex stress characteristic of “dip direction single face unloading - strike direction strain invariant - and tangential multilevel static-dynamic coupling loading” to the roadway surrounding rock, substantially modifying the instability mode and fracture mechanism of soft rock. In this study, true triaxial single-face unloading multilevel disturbance loading tests, equipped with acoustic emission monitoring, are conducted to simulate and replicate this stress path and explore the energy evolution and fracturing mechanism of soft rock under coal seam mining-induced stress. Under multilevel constant amplitude disturbance loading (MCADL), energy density remains stable, with the dominant fracture mechanism transitioning from micro-shear cracking to significant tensile cracking. Both the peak cracking energy and elastic energy density decrease, while dynamic fracture duration extends, resulting in a gentler failure process. In contrast, multilevel variable amplitude disturbance loading (MVADL) induces a stepwise increase in elastic energy density, amplifying the effects of tensile stress. The peak values for cracking energy and elastic energy density are elevated, leading to transient and violent instability characteristics akin to rockbursts. Under MVADL, soft rock exhibits enhanced ultimate energy storage capacity and higher energy release rates, resulting in abrupt and violent failure processes. On the other hand, MCADL conditions yield lower energy release rates, fragmentation levels, and destabilization intensity, resembling rock spalling failures. These findings elucidate the instability modes and disaster mechanisms of soft rocks influenced by mining-induced stress, contributing valuable insights to the field.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144914787","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

Moisture sensing technology as preventive measures against Rainfall-induced slope Failures – A review 水分传感技术对降雨引起的边坡破坏的预防措施综述

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-29 DOI: 10.1007/s10064-025-04463-0

Alfrendo Satyanaga, Alena Fournier-Carrrie, Harianto Rahardjo, Saranya Rangarajan, Gerarldo Davin Aventian, Sung-Woo Moon, Jong Kim

{"title":"Moisture sensing technology as preventive measures against Rainfall-induced slope Failures – A review","authors":"Alfrendo Satyanaga, Alena Fournier-Carrrie, Harianto Rahardjo, Saranya Rangarajan, Gerarldo Davin Aventian, Sung-Woo Moon, Jong Kim","doi":"10.1007/s10064-025-04463-0","DOIUrl":"10.1007/s10064-025-04463-0","url":null,"abstract":"<div><p>Global warming contributes to the changes in climatic conditions such as the frequency and duration of rainfall around the world. Previous research has shown that slope failures are more likely to occur after a long period of drought followed by heavy rainfall or after long periods of low rainfall followed by heavy rainfall. This demands effective slope prevention measures to maintain the stability of high-risk slopes prior to collapse. This study focused on analysing various moisture measurement techniques and real-time assessment of rainfall-induced slope failures, with a case study serving as a validation. The methods to obtain water content were examined, including thermal, satellite-based sensing, radiological approach, resistivity, and dielectric. The result stated that capacitance sensor has the most potential due to its cost-effectiveness and efficiency for tropical region. The proposed case study investigates the utilization of the best outcome of a sensor system established to mitigate rainfall-induced landslides in Bukit Teresa, Singapore. Ultimately, a suitable sensing system should be utilized in alongside numerical modelling to mitigate slope failures to ensure the Early Warning Slope Stability Monitoring (EWSSM) system can function effectively.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144914788","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

Seepage-Induced internal instability processes in glacial deposit under Multi-staged hydraulic loading paths: insights from an undisturbed upward seepage experiment 多级水力加载路径下冰川沉积物渗流诱发的内部不稳定过程：来自无扰动向上渗流实验的启示

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-28 DOI: 10.1007/s10064-025-04428-3

Shixin Zhang, Yufeng Wei, Zhanglei Wu, Chunyu Chen, Hao Yang, Xin Zhang, Peng Liang

{"title":"Seepage-Induced internal instability processes in glacial deposit under Multi-staged hydraulic loading paths: insights from an undisturbed upward seepage experiment","authors":"Shixin Zhang, Yufeng Wei, Zhanglei Wu, Chunyu Chen, Hao Yang, Xin Zhang, Peng Liang","doi":"10.1007/s10064-025-04428-3","DOIUrl":"10.1007/s10064-025-04428-3","url":null,"abstract":"<div><p>Glacial deposits are Quaternary sediments with broad particle-size gradation, resulting from glacial erosion, transport, and deposition. Their permeability characteristics differ notably from those of other Quaternary sediment layers. Accordingly, this study collected glacial deposit samples from the upper reaches of the Yi’Ong Zangbo River in Tibet and analyzed the permeability characteristics and seepage-induced internal instability of glacial deposits under various hydraulic loading paths, using 5 sets of undisturbed upward seepage experiments. Hydraulic conductivity strongly correlates with loading path, while eroded fines accumulation is governed by <i>d</i><sub>15<i>c</i></sub>/<i>d</i><sub>85<i>f</i></sub>. The seepage-induced internal instability process can be divided into 3 distinct stages: initial seepage, suffusion, and internally instability. The hydraulic gradient equation at the onset of suffusion was derived from erosion rate and <i>d</i><sub>15<i>c</i></sub>/<i>d</i><sub>85<i>f</i></sub> indicators. Additionally, the erosion resistance index, calculated from the dry mass of eroded fine particles and dissipated energy, indicates that glacial deposits are generally highly erodible, with erosion resistance improving as <i>d</i><sub>15<i>c</i></sub>/<i>d</i><sub>85<i>f</i></sub> decreases.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909732","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

Calculation model of tunnel surrounding rock load considering moisture content and compactness in sandy pebble soil ground 砂卵石土地基中考虑含水率和密实度的隧道围岩荷载计算模型

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-27 DOI: 10.1007/s10064-025-04450-5

Chunwei Zhang, Xiaojun Zhou, Kejia Yang, Yunpeng Hu

{"title":"Calculation model of tunnel surrounding rock load considering moisture content and compactness in sandy pebble soil ground","authors":"Chunwei Zhang, Xiaojun Zhou, Kejia Yang, Yunpeng Hu","doi":"10.1007/s10064-025-04450-5","DOIUrl":"10.1007/s10064-025-04450-5","url":null,"abstract":"<div><p>Sandy pebble soil presents issues such as loose surrounding rock and collapse during tunnel excavation due to its sensitivity to moisture content and compactness. This study combines indoor large-scale triaxial tests and numerical triaxial tests using particle discrete elements to calibrate the microstructure parameters of sandy pebble soil under different conditions. The relationship between shear strength parameters and moisture content and compactness is established. The barn effect principle is introduced to develop a method for calculating tunnel surrounding rock load, fully considering the influence of compactness and moisture content. Key findings include: (1) increased stress peak with higher compactness and lower moisture content, and increased internal friction angle with decreasing moisture content or increasing compactness; (2) identification of critical microstructure parameters affecting strength properties, such as particle contact modulus, friction coefficient, and porosity; (3) validation of the Janssen model for sandy pebble soil layer load calculation; (4) derivation of a formula for calculating the vertical load of sandy pebble soil tunnel surrounding rock, revealing the influence of compactness and moisture content on lateral pressure.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905173","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

An early warning method for water and mud inrush in deep-buried tunnels using integrated geophysical field techniques 综合地球物理场技术在深埋隧道突水、涌泥预警中的应用

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-27 DOI: 10.1007/s10064-025-04449-y

Zhi-Qiang Li, Yonghao Pu, Lichao Nie, Shilei Zhang, Zhiyong Yang, Lei Han

{"title":"An early warning method for water and mud inrush in deep-buried tunnels using integrated geophysical field techniques","authors":"Zhi-Qiang Li, Yonghao Pu, Lichao Nie, Shilei Zhang, Zhiyong Yang, Lei Han","doi":"10.1007/s10064-025-04449-y","DOIUrl":"10.1007/s10064-025-04449-y","url":null,"abstract":"<div><p>Early warning of water and mud inrush disasters in deep buried tunnels is of great significance for disaster prevention and control. This study proposes an early warning method for water and mud inrush in deep-buried tunnels using integrated geophysical field techniques. Based on multi-physical field advanced geological prediction, we innovatively established an indicator system integrating surrounding rock stress anomalies, P-wave velocities, S-wave velocities, apparent resistivity, Drilling jamming frequency, and drilling water outflow. Secondly, the Analytic Hierarchy Process (AHP) was used to obtain the weights of each indicator. By integrating multiple physical field data using the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method, early warning of water and mud inrush has been achieved. Finally, taking Changyu Village Tunnel as an example, the effectiveness of the method was verified. The results showed that the accuracy of risk identification in six tunnel sections reached 100%, which is highly consistent with the occurrence of on-site disasters. The weight sensitivity analysis found that apparent resistivity and S-wave velocity are the core factors in early warning of water and mud inrush disasters. The research results of this article provide new ideas for the risk assessment of water and mud inrush in deep buried tunnels.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905259","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

“Excavation-freezing-thawing” failure and crack characteristics of open-pit slope in cold regions: a case study in Baorixile mine, Hulunbeir, China 寒区露天矿边坡“开挖-冻结-融化”破坏与裂缝特征——以呼伦贝尔宝日锡勒矿为例

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-27 DOI: 10.1007/s10064-025-04464-z

Guanghe Li, Zihuan Hu, Yanting Wang, Dong Wang, Laigui Wang, Zhigang Tao, Xiaoxu Yang, Yongzhi Du, Zhiwei Zhou, Chunjian Ding, Kun Fang

{"title":"“Excavation-freezing-thawing” failure and crack characteristics of open-pit slope in cold regions: a case study in Baorixile mine, Hulunbeir, China","authors":"Guanghe Li, Zihuan Hu, Yanting Wang, Dong Wang, Laigui Wang, Zhigang Tao, Xiaoxu Yang, Yongzhi Du, Zhiwei Zhou, Chunjian Ding, Kun Fang","doi":"10.1007/s10064-025-04464-z","DOIUrl":"10.1007/s10064-025-04464-z","url":null,"abstract":"<div><p>Open-pit mine slopes can give rise to grave accidents that may lead to loss of life and property. In cold regions, freeze-thaw cycles can result in fractures and cracks in these slopes. It is critical to understand the failure mechanism of open-pit mine slopes in cold regions to ensure the sustainability and safety of mining operations. This study investigates a slope failure in an open-pit mine located in Baorixile, China, with emphasis on cold regions. The field investigation was carried out by employing visual monitoring techniques, Global Navigation Satellite System (GNSS), and Real-time kinematic positioning (RTK) to observe crack development and displacement changes during slope deformations. The collected data was analyzed using fractal analysis, which summarizes and demonstrates the slope’s crack characteristics. Moreover, numerical tests were conducted to gain deeper insights into the underlying causes of the slope failure. The results indicate that the fractal dimension of cracks increases rapidly in the initial stages but subsequently slows down, indicating a transition point between these stages. The root causes of the slope failure in Baorixile mine were evaluated, considering human, physical, and geological factors. An “excavation-freezing-thawing” along a weak plane is proposed for the open-pit mine slopes in cold regions. The study’s findings provide valuable insights into the factors and mechanisms influencing the instability of open-pit slopes in cold regions.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905174","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 the deformation and failure mechanism of soft-hard interbedded composite slopes based on centrifuge model test: an example of the Zhoujia landslide in Sichuan province, China 基于离心模型试验的软硬互层复合边坡变形破坏机制研究——以四川周家滑坡为例

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-26 DOI: 10.1007/s10064-025-04456-z

Lei Wang, Feng Ji, Chunhong Zhou, Wanli Liu, Hao Man, Hanyu Lu, Song Wei

{"title":"Research on the deformation and failure mechanism of soft-hard interbedded composite slopes based on centrifuge model test: an example of the Zhoujia landslide in Sichuan province, China","authors":"Lei Wang, Feng Ji, Chunhong Zhou, Wanli Liu, Hao Man, Hanyu Lu, Song Wei","doi":"10.1007/s10064-025-04456-z","DOIUrl":"10.1007/s10064-025-04456-z","url":null,"abstract":"<div><p>Anti-dip slopes are prone to toppling failure, whereas bedding slopes are susceptible to sliding-bending and sliding-shearing failures. However, a composite slope containing both an anti-dip rock mass (ADRM) and a bedding rock mass (BRM) may experience multiple failure modes simultaneously. To investigate the deformation and failure mechanisms of composite slopes, field investigations were conducted on the Zhoujia landslide. The formation of the composite slope structure was influenced by both tectonic movements and subsequent geological processes. The Zhoujia landslide was simplified, and a centrifuge model test was carried out. Artificial rock slabs were prepared using quartz sand, cement, baryte powder, gypsum, and water. Displacement gauges, earth pressure gauges, and particle image velocimetry (PIV) were employed to monitor the deformation and failure processes of the model during acceleration from 0 to 60 g. The test results indicate that the deformation and failure process of the slope model can be divided into five stages, with three failure modes occurring simultaneously: sliding-bending failure and sliding-shearing failure in the BRM, and flexural toppling failure in the ADRM. On the basis of the change in acceleration, the displacement and earth pressure curves can be divided into six stages. Analysis reveals that structural differences in slopes are the key factors leading to variations in deformation and failure characteristics, which also influence reactivation deformation. The interactions between the components of the composite slope during the experiment affect the failure process. Once failure occurs at the toe of the slope model, it will accelerate slope instability.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897201","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

True triaxial macroscopic mechanical behaviour and microstructural evolution of deep loess on the Loess Plateau 黄土高原深层黄土真三轴宏观力学行为及细观结构演化

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-26 DOI: 10.1007/s10064-025-04452-3

Zechi Wang, Shuai Shao, Shengjun Shao, Hao Wu, Shaoying Zhang, Weiye Fu

{"title":"True triaxial macroscopic mechanical behaviour and microstructural evolution of deep loess on the Loess Plateau","authors":"Zechi Wang, Shuai Shao, Shengjun Shao, Hao Wu, Shaoying Zhang, Weiye Fu","doi":"10.1007/s10064-025-04452-3","DOIUrl":"10.1007/s10064-025-04452-3","url":null,"abstract":"<div><p>Understanding the mechanical behaviour and microevolutionary trend of deep loess is important for future engineering construction of high slopes and deep foundations on the Loess Plateau. True triaxial compression tests and scanning electron microscopy (SEM) imaging of deep loess samples were conducted. The microscopic properties of loess pores in the obtained SEM images were identified using Particle (Pore) and Crack Analysis System software. The relationships between the microparameters of the pores and mechanical properties of loess were explored using Pearson’s correlation analysis. The results of this study demonstrated that the critical intermediate principal stress parameter <i>b</i><sub>s</sub> is related to the soil properties and loading path and is independent of the confining pressure. The strength of deep loess linearly increases with confining pressure, and the SMP strength criterion provides the most accurate prediction of the shear strength parameters of Xi'an loess. Among the deep loess samples, the proportion of medium pores is the highest. The directional behaviour of the pore area is weak, and an increase in the confining pressure does not significantly affect the pore area. However, this process leads to a more disordered arrangement of pores. Furthermore, the mesopore content and confining pressure, as well as the orientation probability entropy of the number of pores, play a positive role in the strength of deep loess, while the total pore and macropore contents negatively impact the strength of deep loess. The fractal dimension, micropore content and orientation probability entropy of the pore area are not significantly correlated with the strength of deep loess.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897031","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

Failure mechanism of a loess-red silty clay interface landslide on the Heifangtai platform, China 黑方台地台黄土-红粉质粘土界面滑坡破坏机制

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-25 DOI: 10.1007/s10064-025-04454-1

Penghui Ma, Zekun Li, Jianqi Zhuang, Qingyi Mu, Jiaxu Kong, Jianbing Peng

{"title":"Failure mechanism of a loess-red silty clay interface landslide on the Heifangtai platform, China","authors":"Penghui Ma, Zekun Li, Jianqi Zhuang, Qingyi Mu, Jiaxu Kong, Jianbing Peng","doi":"10.1007/s10064-025-04454-1","DOIUrl":"10.1007/s10064-025-04454-1","url":null,"abstract":"<div><p>Loess-red silty clay interface landslides are one of the most widely distributed types of loess landslide disasters in China. In this study, field investigations, numerical simulation, model tests, and microscopic tests were conducted to reveal the failure mechanism of the loess-red silty clay interface landslide that occurred on the Heifangtai Platform on 1 April 2023. The findings revealed that the landslide, which was characterised by high speed and long distance, exhibited remarkable features. It lasted 39 s, during which the maximum sliding velocity reached 14.2 m/s. The maximum thickness of the deposits resulting from the landslide was 6.94 m, and the sliding distance exceeded 250 m. A large number of cracks were distributed around the edge slope of the landslide; these served as primary pathways for infiltration. Furthermore, the difference in permeability between the loess and red silty clay led to the accumulation of water at the bottom of the loess. This increased the water content of the loess and decreased the soil strength, thereby initiating the landslide. During the seepage process, water infiltration carries many fine particles in loess, accumulating at the interface between the loess and red silty clay, causing blockages. This accelerates the gathering of water flow at the interface, contributing to decreased soil strength. In additon, the pores in the loess undergo significant changes, with large pores in the soil decreasing and small pores increasing, forming a flocculent structure. These findings provide scientific evidence for the failure mechanism of loess interface landslides.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893919","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 and numerical investigation of gas preferential flow through geosynthetic clay liner overlap joint in landfill final cover system 填埋末盖系统中土工合成粘土衬里重叠缝气体优先流动的实验与数值研究

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-08-22 DOI: 10.1007/s10064-025-04426-5

Lin Qin, Fusheng Zha, Rui Xu, Songyu Liu, Abdelmalek Bouazza, He Huang, Qiao Wang

{"title":"Experimental and numerical investigation of gas preferential flow through geosynthetic clay liner overlap joint in landfill final cover system","authors":"Lin Qin, Fusheng Zha, Rui Xu, Songyu Liu, Abdelmalek Bouazza, He Huang, Qiao Wang","doi":"10.1007/s10064-025-04426-5","DOIUrl":"10.1007/s10064-025-04426-5","url":null,"abstract":"<div><p>Gas migration control is a critical function of landfill cover systems, particularly in minimizing greenhouse gas emissions and ensuring environmental safety. This study investigates the gas flow behavior of needle-punched geosynthetic clay liner (GCL) overlap joints over a wide range of gravimetric moisture contents. A finite element model was employed to simulate gas transport through a landfill cover system, incorporating the effects of both GCL overlap joints and geomembrane defects. Experimental results reveal that the gas permeability of GCL overlap seams is 3.5 to 100 times greater than that of intact GCLs. Notably, the influence of moisture content on permeability reduction at the overlap seams is relatively limited, which is attributed to the layered structure of the GCL that restricts water penetration into the joint interface. Numerical simulations further demonstrate that geomembrane defects significantly intensify preferential gas flow through GCL overlap joints. Moreover, the radial distance (<i>r</i>) between geomembrane defects and GCL seams plays a critical role in determining landfill gas emission flux at the cover surface. At a water saturation degree of 70%, the maximum surface emission flux for the case with <i>r</i> = 2.5 m is nearly two orders of magnitude lower than when <i>r</i> = 0. These results highlight the importance of maintaining geomembrane integrity, particularly above GCL overlap seams. Overall, the findings offer valuable theoretical and practical guidance for the design and maintenance of effective landfill cover systems.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888059","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