Bulletin of Engineering Geology and the Environment最新文献_第5页

An interpretable spatiotemporal deep learning framework for rainfall-induced landslide prediction based on susceptibility dynamic updates 基于敏感性动态更新的降雨诱发滑坡预测可解释时空深度学习框架

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-12 DOI: 10.1007/s10064-026-05231-4

Shilin Zhu, Lixia Chen, Kunlong Yin, Zhenghua Liu, Linyin Dai, Xingchen Zhang, Samuele Segoni

{"title":"An interpretable spatiotemporal deep learning framework for rainfall-induced landslide prediction based on susceptibility dynamic updates","authors":"Shilin Zhu, Lixia Chen, Kunlong Yin, Zhenghua Liu, Linyin Dai, Xingchen Zhang, Samuele Segoni","doi":"10.1007/s10064-026-05231-4","DOIUrl":"10.1007/s10064-026-05231-4","url":null,"abstract":"<div><p>Regional meteorological warning of rainfall-induced landslides remains difficult in data-limited mountainous areas because spatially distributed geotechnical parameters are often unavailable and static susceptibility models cannot update slope conditions after new failures occur. This study develops an interpretable dynamic prediction framework for large-area landslide probability forecasting using routinely available landslide inventory, geo-environmental, and rainfall data. The framework first updates a Random Forest susceptibility map through a Normalized Spatial Distance Index as new landslides are recorded. The updated map then guides high-confidence sample selection, and static conditioning factors and rainfall sequences are integrated by a convolutional neural network-long short-term memory model to generate daily landslide probability forecasts at 15-m resolution. The framework was tested in Kecheng District, China, using landslide records, geo-environmental factors, and rainfall observations from 2005 to 2022. Independent validation across two rainfall events a decade apart achieved 83.33% accuracy and MAE < 0.16, outperforming static benchmark models. SHapley Additive exPlanations (SHAP) analysis showed that the model learned physically plausible triggering patterns related to 16–24 h cumulative rainfall and short-duration high-intensity rainfall. The results indicate that dynamic susceptibility updating can support interpretable regional warning of rainfall-induced landslides where dense geotechnical monitoring is unavailable.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927286","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

Biopolymer-modified soil–rock mixtures for open-pit mine waste-dump slopes: investigation of mechanical behavior and microscopic mechanisms 露天矿排土场边坡生物聚合物改性土石混合体：力学行为和微观机制研究

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-10 DOI: 10.1007/s10064-026-05280-9

Rui Li, Xiang Qi, Yu Lu, Xiang Lu, Yihan Guo, Lixiao Tu, Ya Tian, Zhile Wang

{"title":"Biopolymer-modified soil–rock mixtures for open-pit mine waste-dump slopes: investigation of mechanical behavior and microscopic mechanisms","authors":"Rui Li, Xiang Qi, Yu Lu, Xiang Lu, Yihan Guo, Lixiao Tu, Ya Tian, Zhile Wang","doi":"10.1007/s10064-026-05280-9","DOIUrl":"10.1007/s10064-026-05280-9","url":null,"abstract":"<div><p>The reshaping of soil–rock mixtures (S-RM) on slopes within the secondary stripping zones of open-pit mines constrains both resource recovery and production safety. In this study, calcium lignosulfonate (CLS) and xanthan gum (XG) were used to enhance the mechanical performance of S-RM. The effects of varying dosages were evaluated through Atterberg limits, standard Proctor compaction, and consolidated undrained triaxial tests, while scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses were employed to elucidate the underlying modification mechanisms. Results show that at CLS and XG contents of 3% and 1. 5%, respectively, inflection points appear in the liquid limit and plasticity index curves. At the corresponding optimum moisture contents, cohesion increased by 42. 8% for CLS-modified specimens and by 70. 5% for XG-modified specimens compared to the unmodified state, while the internal friction angle increased by 63. 02% and 49%, respectively. Microstructural observations reveal that CLS primarily reinforces the mixture through consolidation, pore optimization, and ionic flocculation, whereas XG relies on networked consolidation, surface adsorption, and ionic bridging to improve strength. However, excessive addition leads to binder agglomeration, overfilling of voids, and insufficient structural support, ultimately reducing stability. This work provides a theoretical basis for the environmentally friendly application of bio-polymers in modifying reconstituted S-RM slopes in open-pit mines.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927343","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

Landslide hazard assessment in Nainital hills of Indian Himalayas using Interferometric Synthetic Aperture Radar (InSAR) 基于干涉合成孔径雷达（InSAR）的印度喜马拉雅山脉奈尼塔尔丘陵滑坡危险性评价

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-10 DOI: 10.1007/s10064-026-05308-0

Achla Joshi, Girish Ch Kothyari, Atul K. Patidar, Rakesh K. Dumka, Ajay Kumar Taloor, Aadil Hussain Padder

{"title":"Landslide hazard assessment in Nainital hills of Indian Himalayas using Interferometric Synthetic Aperture Radar (InSAR)","authors":"Achla Joshi, Girish Ch Kothyari, Atul K. Patidar, Rakesh K. Dumka, Ajay Kumar Taloor, Aadil Hussain Padder","doi":"10.1007/s10064-026-05308-0","DOIUrl":"10.1007/s10064-026-05308-0","url":null,"abstract":"<div><p>Landslides represent a common geological hazard in mountainous areas, resulting in environmental and socio-economic consequences. Our study focuses on recent mass movements in various locations of the Nainital Hills in the Outer Lesser Himalaya, India. The locations of ground creep and mass movements between the years 2017 and 2024 are monitored using the Persistent Scatterers Interferometry (PSI) technique. The PSI base estimate indicates a maximum subsidence rate of -5 to -11 mm/yr in the Balia Nala region and uplift rates reaching > 12 mm/yr in the Sher-Ka-Danda ridge. These findings are well consistent by the results of GPS-based strain measurements. Deformation velocities show considerable variability, with average rates ranging from ± 10 to ± 19 mm/yr. Persistent uplift in the Sher-Ka-Danda region and subsidence in the Balia Nala area towards the southeast of the Naini-Lake Fault (NF) are consistent with localized terrain instability patterns. The velocity profiles reveal spatial variations in deformation, strongly associated with active fault systems such as the Main Boundary Thrust (MBT), Krishnanagar Fault (KnF), Manora Fault (MF), and Jeol Thrust (JT). In such tectonically active regions, fault dynamics cause significant uplift and subsidence, which remains consistent with slope instability. The present study indicates the application and usefulness of the PSI technique in monitoring unstable slopes in tectonically active regions of the Himalayas. The outcome indicates that the Balia Nala region and its surrounding area fall under a landslide-prone zone. This necessitates scientific and systematic mitigation strategies to safeguard lives and infrastructure from future geohazards.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927567","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

Dynamic properties as well as long-term stability of palm fiber reinforced soil 棕榈纤维加筋土的动力特性及长期稳定性研究

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-10 DOI: 10.1007/s10064-026-05305-3

Li Wei, Haizhang Pei, Pei Wang, Fang Li

{"title":"Dynamic properties as well as long-term stability of palm fiber reinforced soil","authors":"Li Wei, Haizhang Pei, Pei Wang, Fang Li","doi":"10.1007/s10064-026-05305-3","DOIUrl":"10.1007/s10064-026-05305-3","url":null,"abstract":"<div><p>Long-term vehicular loading induces cracking in embankment soil, which can progressively develop into structural failure of the soil. To address this issue and improve the embankment soil’s long-term stability, palm fiber-lime-soil (FLS) treatment was adopted. The optimal fiber content was determined by conducting static triaxial tests of FLS samples. Subsequently, dynamic triaxial tests under multi-stage and constant-amplitude cyclic loading (with constant deviatoric stress amplitude) were performed, aiming to evaluate the improvement effect of fiber reinforcement on the dynamic bearing capacity and cumulative plastic strain of soil. Finally, scanning electron microscopy (SEM) tests were performed to reveal the synergistic mechanism by which palm fiber reinforcement and lime stabilization. The results indicate that: (1) FLS with 1% fiber content exhibits optimal shear strength, with its cohesion and internal friction angle increasing by 216% and 33%, respectively, over lime stabilized soil (LS). (2) Compared to LS, FLS exhibited higher dynamic bearing capacity, greater elastic deformation resistance, and improved vibration-damping performance. (3) Cumulative plastic strain is inhibited by a lower amplitude, higher confining pressure, fiber reinforcement, and a higher frequency, in descending order of influence. (4) Both FLS and LS have shakedown limits exceeding 400 kPa, while FLS shows superior long-term stability. (5) Lime enhanced the bonding strength between soil particles and fibers, while fibers compensated for the low crack resistance of LS, thus endowing FLS with better dynamic performance. In conclusion, an embankment fill with 10% lime and 1% palm fiber is recommended, which contributes to a prolonged roadway service life.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927349","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

Disasters resulting from the coupling effect of high temperature and high stress in deep mines: prevention and control measures 深部矿井高温高应力耦合效应引发的灾害：防治措施

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-09 DOI: 10.1007/s10064-026-05184-8

Shenghua Yin, Jialu Zeng, Leiming Wang, Wei Chen, Xun Chen, Yun Zhou, Liang Cheng

{"title":"Disasters resulting from the coupling effect of high temperature and high stress in deep mines: prevention and control measures","authors":"Shenghua Yin, Jialu Zeng, Leiming Wang, Wei Chen, Xun Chen, Yun Zhou, Liang Cheng","doi":"10.1007/s10064-026-05184-8","DOIUrl":"10.1007/s10064-026-05184-8","url":null,"abstract":"<div><p>As mining advances beyond 1 km, high geothermal temperatures and high in-situ stresses increasingly act together, degrading working conditions and increasing the risk of heat-related hazards and dynamic failures. This review examines disasters induced by the coupled high-temperature–high-stress environment in deep mines and summarizes prevention and control strategies from three perspectives. First, depth-dependent changes in ground temperature, heat load distribution, and in-situ stress are reviewed to clarify the physical basis of heat damage and stress-induced instability. Second, heat-hazard mitigation measures are compared, including passive cooling methods such as ventilation, thermal insulation, water/ice cooling, and functional backfill, as well as active cooling approaches that integrate geothermal energy utilization through HEMS and EGS. Third, prevention and control of dynamic disasters, particularly rockburst, are discussed in terms of monitoring and early warning, energy-absorbing support, and cemented backfill. This review provides a concise framework for understanding coupled thermal–mechanical hazards and developing coordinated control measures for safe deep mining.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927191","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

Mechanism of seawater intrusion in underground water-sealed oil storage caverns on islands: a DFN approach 海岛地下水封储油洞室海水入侵机理：DFN方法

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-09 DOI: 10.1007/s10064-026-05292-5

Yutao Li, Bin Zhang, Hanxun Wang, Wei Zhong

{"title":"Mechanism of seawater intrusion in underground water-sealed oil storage caverns on islands: a DFN approach","authors":"Yutao Li, Bin Zhang, Hanxun Wang, Wei Zhong","doi":"10.1007/s10064-026-05292-5","DOIUrl":"10.1007/s10064-026-05292-5","url":null,"abstract":"<div><p>The construction of underground water-sealed oil storage (UWSOS) facilities on islands is an emerging method for oil storage. However, compared with inland freshwater environments, the groundwater seepage characteristics in island environments are more complex and involve the risk of seawater intrusion. Taking an island-based UWSOS project as the research subject, this study adopts numerical modeling to investigate the mechanisms of seawater intrusion in such systems. A program for generating discrete fracture networks (DFN) and automatically identifying connectivity was developed. DFN models and equivalent porous medium (EPM) models were established accordingly. Simulation results indicate that the groundwater pressure distribution in the DFN model closely resembles that in the EPM model, but the seepage velocity in the DFN model is approximately four orders of magnitude higher than that in the EPM model. While the EPM model can simulate seawater intrusion at a macroscopic spatial scale, significant differences emerge between the EPM and DFN models on a temporal scale during seawater intrusion processes. Based on the DFN model, the effects of fracture parameters and water curtain parameters on seawater intrusion were examined, and the barrier effects of vertical water curtains and grouting curtains against seawater intrusion were compared. The results show that fracture density and orientation significantly affect the extent of seawater intrusion. Additionally, vertical water curtains exhibit a better barrier effect against seawater intrusion compared to grouting curtains.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927190","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

Fracture behavior of synthetic sandstone under hydro-mechanically coupled dual-period compressive torsion 水-力耦合双周期压缩扭转作用下合成砂岩的断裂行为

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-08 DOI: 10.1007/s10064-026-05301-7

Xiaodong Zhao, Xin Long, Xu Cai, Lihua Hu, Xuhai Feng

{"title":"Fracture behavior of synthetic sandstone under hydro-mechanically coupled dual-period compressive torsion","authors":"Xiaodong Zhao, Xin Long, Xu Cai, Lihua Hu, Xuhai Feng","doi":"10.1007/s10064-026-05301-7","DOIUrl":"10.1007/s10064-026-05301-7","url":null,"abstract":"<div><p>Compressive torsion (C–T) fractures induced by Yanshanian and Himalayan tectonics commonly occur in Mesozoic formations within transpressional basins. A clear understanding of the characteristics of these fractures is crucial for investigating their evolution during shaft sinking. However, Mesozoic sandstones are characterized by relatively weak diagenesis, high porosity, and strong sensitivity to groundwater, stress perturbation, and coring disturbances. Consequently, the mechanical and hydraulic properties of the retrieved sandstones may differ from their original in situ states. In this study, sandstone specimens are synthesized via layered packing, temporary cementation, and selective sintering to reproduce cement-free direct intergranular contacts. Hydro-mechanically coupled C–T tests were then conducted on the synthetic specimens to reproduce Yanshanian fracture (YF) under simulated transpressional tectonic condition. Moreover, damage-based fracture simulations incorporating a nonuniform parameter-assignment strategy are employed to investigate the formation of Himalayan fracture (HF) and its conjugate relationship with YF. The results indicate that the damage gradient associated with YF and the applied C–T induce rotation of the major principal stress axis. Both YF and HF exhibit mixed-mode shear–tensile characteristics, with their inclination angles to the compression direction slightly smaller than the major principal stress orientation angle. HF initiates nearly perpendicular to YF, while the overall HF–YF intersection angle remains below 45°+ <span>(:varphi:)</span>/2. The integration of hydro-mechanically coupled C–T tests on synthetic specimens with damage-based simulations provides a novel framework for quantitatively elucidating fracture geometry and its underlying formation mechanisms in transpressional basins.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148926741","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

Multi source data integration method for tunnel seepage field analysis in karst strata 岩溶地层隧道渗流场分析的多源数据集成方法

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-08 DOI: 10.1007/s10064-026-05303-5

Zuodong Xie, Chuan He, Ziquan Chen, Kaiyue Wang, Yulin Zou, Jing Liu, Cheng Jiang

{"title":"Multi source data integration method for tunnel seepage field analysis in karst strata","authors":"Zuodong Xie, Chuan He, Ziquan Chen, Kaiyue Wang, Yulin Zou, Jing Liu, Cheng Jiang","doi":"10.1007/s10064-026-05303-5","DOIUrl":"10.1007/s10064-026-05303-5","url":null,"abstract":"<div><p>Tunnelling through complex karst strata is highly prone to water inrush and disturbance of regional groundwater. Reliable inflow prediction and groundwater protection demand quantifying the spatiotemporal evolution of karst seepage fields, but this is hampered by strong heterogeneity, seepage-dominant structures, scale effects, sparse data, and uncertain river or watershed boundaries. To address these challenges, this study develops a regional-scale workflow that integrates generalized coupled Markov chain-based stratigraphic reconstruction, an anisotropic MODFLOW model, and a calibrated head-dependent DRAIN boundary. Multi source geological observations are first assimilated to reconstruct the three-dimensional stratigraphic architecture. The reconstructed geological units are then incorporated into the groundwater-flow model, while the tunnel conductance is calibrated and independently validated using construction-stage inflow records. Results show that regional heads mirror topographic relief and the drainage network. The ridge acts as a groundwater divide, with flow descending from high to lower potential zones on both flanks, dominantly from north to south and from west to east. During excavation, tunnel inflow varies markedly along the alignment, peaking where the tunnel crosses dolomite (124786 m³·d⁻¹) and reaching 89,522 m³·d⁻¹ in fault zones. After completion, the system approaches a new quasi-steady state with tunnel centered convergence and persistent deep drawdown; stronger waterproofing and favorable routing further shrink the drawdown footprint and reduce tunnel inflow. These findings provide a quantitative basis for drainage capacity sizing, targeted grouting and support, route optimization, and protection of regional groundwater across the tunnel lifecycle.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148926995","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

Energy evolution and failure characteristics of shale under true-triaxial unloading paths 真三轴卸荷路径下页岩能量演化与破坏特征

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-08 DOI: 10.1007/s10064-026-05279-2

Dongping Liu, Jiacun Liu, Ying Xu, Zhuokang Cao, Kaiwen Xia

{"title":"Energy evolution and failure characteristics of shale under true-triaxial unloading paths","authors":"Dongping Liu, Jiacun Liu, Ying Xu, Zhuokang Cao, Kaiwen Xia","doi":"10.1007/s10064-026-05279-2","DOIUrl":"10.1007/s10064-026-05279-2","url":null,"abstract":"<div><p>During oil and gas extraction and the tunnel excavation, the failure characteristics of shale become highly complex due to the combined effects of inherent structural anisotropy and true-triaxial unloading stress paths. To investigate the energy evolution and failure modes of shale under true-triaxial unloading path, a series of unloading experiments were performed with emphasis on the intermediate principal stress (<span>({sigma}_{2})</span>). The peak strength and stress–strain curve of shale were first analyzed. Subsequently, the energy evolution process and failure modes under true triaxial unloading paths were discussed. The results indicate that both the strength and deformability of shale are governed by the coupled effects of the initial stress state and bedding plane inclination. With increasing <span>({sigma}_{2})</span> in the initial stress state, the peak elastic energy, peak dissipated energy, and total input energy increase progressively, exhibiting an approximately linear relationship. When <span>({sigma}_{2})</span> is relatively low, the failure modes of shale are significantly affected by the bedding plane inclinations, presenting splitting along bedding planes, shear slip along bedding planes, and shear failure across bedding planes. When <span>({sigma}_{2})</span> is relatively high, the influence of structural anisotropy diminishes, and the failure behavior is dominated by shear failure across bedding planes. Furthermore, pronounced differences are observed in the microstructural characteristics of shear and splitting fracture surfaces. From the perspective of energy dissipation at the fracture initiation stage, these observations provide a mechanistic interpretation for the variations in dissipated energy during unloading.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148926742","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

Investigation on long-term hydraulic behaviour and microstructure evolution of alkaline solution-treated bentonite pellet mixtures 碱液处理膨润土球团混合物的长期水力特性及微观结构演变研究

IF 4.9 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-07 DOI: 10.1007/s10064-026-05306-2

Jiesheng Shao, De’an Sun, Zhaotian Zeng, Mingyu Lin

{"title":"Investigation on long-term hydraulic behaviour and microstructure evolution of alkaline solution-treated bentonite pellet mixtures","authors":"Jiesheng Shao, De’an Sun, Zhaotian Zeng, Mingyu Lin","doi":"10.1007/s10064-026-05306-2","DOIUrl":"10.1007/s10064-026-05306-2","url":null,"abstract":"<div><p>Long-term hydraulic characteristics of bentonite pellet mixtures impacted by alkaline solution released via concrete degradation need accurate characterization, which is indispensable for safety design of high-level radioactive waste (HLW) deep geological repositories. This research focused on permeability variations of compacted bentonite pellet mixtures subjected to varied particle size distribution, alkaline solution concentration and aging time, with the aid of the mercury intrusion porosimetry and thermogravimetric tests. The results are as follows. Elevated concentrations of alkaline solution led to an increase in hydraulic conductivity of specimens saturated by the alkaline solution increased. As the concentration and aging time increased, the hydraulic conductivities of specimens after aging saturated by the deionized water increased. As the aging time was extended, the cumulative pore volume of unsaturated specimens containing alkaline solution increased slightly. The pore size distribution was slightly affected by the alkaline solution concentration compared with the aging time. The peak and distribution of macropores were substantially dependent on the particle size distribution, while the intra-aggregate pores were almost unaffected. As the concentration rises, the free water and adsorbed water contents of unsaturated PPM specimen containing alkaline solution decreased to varying degrees. When the PPM specimen after aging was saturated by the deionized water, the free water and adsorbed water contents were higher than those of the unsaturated specimen. With increasing the erosion degree of the specimen, the pore structure and adsorbed water content of compacted bentonite pellet mixture containing alkaline solution changed, which account for the deterioration of its macroscopic hydraulic properties.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"85 10","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148926775","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