Bulletin of Engineering Geology and the Environment最新文献_第9页

Effect of MICP treatment on hydraulic characteristics of undisturbed sandy loess MICP处理对原状沙质黄土水力特性的影响

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-23 DOI: 10.1007/s10064-025-04421-w

Chenchen Huang, Qiang Du, Liqiang Qu, Jialin Xue

{"title":"Effect of MICP treatment on hydraulic characteristics of undisturbed sandy loess","authors":"Chenchen Huang, Qiang Du, Liqiang Qu, Jialin Xue","doi":"10.1007/s10064-025-04421-w","DOIUrl":"10.1007/s10064-025-04421-w","url":null,"abstract":"<div><p>This study explored Microbial-induced carbonate precipitation (MICP) technology to address the poor water stability and low cohesion of natural sandy loess, which is prone to geological hazards. Three calcium sources (calcium chloride, calcium acetate, calcium lactate) were used to treat small-scale samples under varying soaking durations. Results from disintegration, collapsibility, permeability, and strength tests revealed distinct performance differences. Calcium acetate-treated samples achieved an 86.7% reduction in disintegration after 7 days, outperforming other calcium sources. Both calcium chloride and calcium acetate-treated samples reduced collapsibility by > 90% within 3 days. Permeability coefficients decreased by one order of magnitude after 3 days and by 2 ~ 3 orders after 7 days for calcium acetate and calcium lactate treated samples. However, the unconfined compressive strength (UCS) of MICP-treated samples remained only 72 ~ 88% of untreated samples post-treatment, attributed to structural disruption from excessive water during MICP application. While MICP significantly enhanced water stability, the process weakened intrinsic soil structure, leading to lower mechanical strength despite improved erosion resistance. These findings highlight MICP’s potential for mitigating sandy loess hazards but underscore the need to balance water stability enhancement with structural integrity preservation in practical applications.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167973","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 damage and aging characteristics of artificial pillar materials in moist environments: insights from humidity-controlled experiments and acoustic emission analysis 潮湿环境下人工支柱材料的机械损伤和老化特性：来自湿度控制实验和声发射分析的见解

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-22 DOI: 10.1007/s10064-025-04422-9

Yu Zhou, Wen Wan, Wei Chen, Yanlin Zhao, Wenqing Peng, Sheng Ren, Yuanzeng Wang, Zhili Peng, Jingdi Wan

{"title":"Mechanical damage and aging characteristics of artificial pillar materials in moist environments: insights from humidity-controlled experiments and acoustic emission analysis","authors":"Yu Zhou, Wen Wan, Wei Chen, Yanlin Zhao, Wenqing Peng, Sheng Ren, Yuanzeng Wang, Zhili Peng, Jingdi Wan","doi":"10.1007/s10064-025-04422-9","DOIUrl":"10.1007/s10064-025-04422-9","url":null,"abstract":"<div><p>This study investigates the mechanical damage properties of artificial pillars in moist humid environments using specimens obtained from the mill mining area of Wengfu phosphate rocks. A custom-made humidity control device to provide four relative humidity levels (70%, 80%, 90%, and 100% RH). The mass and size of each specimen were tracked over time and unconfined expansion, uniaxial, and triaxial compression tests conducted and a digital image correlation method used. Scanning electron microscopy (SEM) and an acoustic emission (AE) device were used in this study to analyse the temporal changes in microstructure, expansion, mass loss, and corrosion depth, and assess the effects of humidity on macroscopic mechanical properties respectively. The findings indicate that hydro-rock interaction leads to the transformation of crystal morphology and the formation of microcracks in specimens, and higher relative humidity levels cause greater changes in mass, size, and expansion. The uniaxial compressive strength (UCS) decreases with storage time, particularly in specimens exposed to 100% RH for 60 days. Cohesion and internal friction angle also decrease over time, with cohesion being more sensitive to humidity. These results provide construction of a mechanical damage model, which can contribute to the prediction and assessment of pillar deterioration in high-humidity underground environments.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168318","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

Low-pressure effects on dry-granular flow dynamics: implications for geological disasters 低压对干颗粒流动动力学的影响：对地质灾害的启示

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-15 DOI: 10.1007/s10064-025-04414-9

Yuxiang Hu, Dong Yang, Hu Zheng

{"title":"Low-pressure effects on dry-granular flow dynamics: implications for geological disasters","authors":"Yuxiang Hu, Dong Yang, Hu Zheng","doi":"10.1007/s10064-025-04414-9","DOIUrl":"10.1007/s10064-025-04414-9","url":null,"abstract":"<div><p>Granular materials are ubiquitous in daily life and industrial processes, playing key roles in natural phenomena and disasters. These materials consist of discrete solid particles whose flow behavior is influenced by external conditions, including ambient pressure. While the impact of gas-phase interactions on granular flows has been extensively studied in industrial applications, their role in geological disasters, such as landslides, avalanches, and debris flows, remains less explored. This review highlights the influence of ambient pressure and interstitial gases on the flow properties of granular materials, particularly in low-pressure environments such as high-altitude regions and extraterrestrial bodies. We explore the theoretical and experimental advancements in understanding gas–solid interactions and their implications for natural hazard prediction and risk assessment. Additionally, we examine state-of-the-art computational models, particularly CFD-DEM, to study gas–solid coupling in granular flows. Finally, we identify knowledge gaps and propose future research directions to improve our understanding of granular flow dynamics under extreme environmental conditions.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166110","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

Rainfall induced mass-movements in the Qinghai-Tibet Plateau: insights on temporal and spatial triggering patterns

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-15 DOI: 10.1007/s10064-025-04415-8

Kezhen Yao, Stefano Luigi Gariano, Bin Tong, Saini Yang

{"title":"Rainfall induced mass-movements in the Qinghai-Tibet Plateau: insights on temporal and spatial triggering patterns","authors":"Kezhen Yao, Stefano Luigi Gariano, Bin Tong, Saini Yang","doi":"10.1007/s10064-025-04415-8","DOIUrl":"10.1007/s10064-025-04415-8","url":null,"abstract":"<div><p>The Qinghai-Tibet Plateau (QTP) is highly affected by rainfall-induced mass-movements (i.e., landslides, debris flows, rock falls) due to its geomorphological and climatic characteristics and anthropogenic activities. However, understanding these events and their triggering characteristics remains limited due to scarce hazard inventories and rain gauge measurements. Using a well-documented dataset of mass-movements (2001–2022) and satellite rainfall estimates, this study comprehensively analyzes the temporal and spatial patterns of the events and their triggers. Results confirm rainfall as the dominant factor, accounting for most fatalities and damages, with antecedent rainfall on the day of occurrence and 7 days prior playing a key role in triggering. Empirical rainfall thresholds at different non-exceedance probabilities, calculated for the first time in QTP, exhibit high parameter robustness and detection capacity. A new methodological approach to evaluate the temporal evolution of the triggering rainfall thresholds reveals a pronounced decreasing trend over the last decade, indicating that the QTP landscape has been experiencing more favorable triggering conditions for mass-movements, particularly under prolonged rainfall. Spatial variations in rainfall triggering conditions were found in several environmental subregions, demonstrating the adaptation of the landscape to different predisposing conditions, with lower-frequency areas showing lower thresholds. This work advances the knowledge of rainfall-induced mass-movements in this peculiar high-mountain area and may lay the foundation for the implementation of operational warning systems for mass-movements in the Third Pole.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166114","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

Insight into unloading and geostress characteristics of high slopes based on valley evolution: a case study in Luding county, China 基于山谷演化的高边坡卸荷与地应力特征研究——以泸定县为例

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-09 DOI: 10.1007/s10064-025-04406-9

Hongfu Zhou, Shuwu Li, Fan Yang, Tian Fang, Rui Li, Jingyi Xue, Jinpeng Hu, Jiang Xing

{"title":"Insight into unloading and geostress characteristics of high slopes based on valley evolution: a case study in Luding county, China","authors":"Hongfu Zhou, Shuwu Li, Fan Yang, Tian Fang, Rui Li, Jingyi Xue, Jinpeng Hu, Jiang Xing","doi":"10.1007/s10064-025-04406-9","DOIUrl":"10.1007/s10064-025-04406-9","url":null,"abstract":"<div>\u0000 \u0000 <p>The geostress field in valley areas with high tectonic stress is an important factor to consider in the construction of major projects. Taking the bank slope of the Dadu River Bridge in Luding County, China as an example, multiple methods were integrated to establish a numerical model. The unloading and secondary stress characteristics of the bank slope rock mass are then quantitatively researched through the multi-stage total process evolution of river undercutting. The results show that both slopes of the Dadu River Bridge had undergone significant geostress release and unloading rebound to the slope surface when the Dadu River cut down to the present-day valley. There was a low geostress zone (unloading relaxation zone) with a 40 ~ 70 m thickness in the shallow surface of the slope, and a high geostress zone occurred 120 ~ 250 m below the riverbed surface. There were “hump geostress” zones developed 150 ~ 500 m from the horizontal distance to the bank surface. Based on the research results, the concept and connotation of the hump index of geostress are proposed and defined to characterize the elevation degree of “hump geostress” compared with normal geostress. Understanding the spatial distribution of the geostress on bank slopes will have significant practical meaning for guiding geohazard prevention and mitigation and the construction and operation management of the Dadu River grand bridge.</p>\u0000 </div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163752","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 experimental investigation on the macroscopic and microscopic fracture behaviour of brittle granite using a novel true triaxial apparatus 用新型真三轴仪对脆性花岗岩的宏观和微观断裂行为进行了试验研究

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-08 DOI: 10.1007/s10064-025-04409-6

Lei Shi, Xiwei Zhang

{"title":"An experimental investigation on the macroscopic and microscopic fracture behaviour of brittle granite using a novel true triaxial apparatus","authors":"Lei Shi, Xiwei Zhang","doi":"10.1007/s10064-025-04409-6","DOIUrl":"10.1007/s10064-025-04409-6","url":null,"abstract":"<div><p>True triaxial compression (TTC) tests were conducted on granite specimens from a depth of 1000 m to investigate the effects of <i>σ</i>₂ and <i>σ</i>₃ on both macroscopic and microscopic fracture behaviour. Under true triaxial stress conditions, the specimens exhibited pronounced directional fracturing. The macroscopic fracture planes were parallel to the <i>σ</i>₁–<i>σ</i>₂ plane, while microcracks were mainly distributed perpendicular to the <i>σ</i>₁ and <i>σ</i>₂ directions. The results showed that <i>σ</i>₂ and <i>σ</i>₃ exert different influences on the fracture behaviour of the specimens. When <i>σ</i>₂ was held constant at 40 MPa, increasing <i>σ</i>₃ from 0 to 30 MPa caused a transition in the initial slope of the post-peak stress–strain curve from positive (Class II behaviour) to negative (Class I behaviour). Concurrently, the angle between the macroscopic fracture plane and the <i>σ</i><sub>1</sub> direction increased from approximately 0° to 30°, indicating a shift in the failure mechanism from extensional to shear. In contrast, when <i>σ</i>₃ = 0 MPa, increasing <i>σ</i><sub>2</sub> from 10 to 40 MPa did not change the macroscopic fracture angle (about 0°) but reduced microcrack number and density. For example, on thin section perpendicular to the <i>σ</i><sub>1</sub> direction, the number of microcracks decreased from 391 to 127, and the crack density dropped from 0.68 to 0.11 mm⁻<sup>1</sup>. These findings suggest that higher <i>σ</i><sub>2</sub> promotes the release of elastic energy and increases the risk of strain bursts, especially near excavation boundaries.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162980","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 behavior of marine deposited clay under the simulated circular tunneling construction disturbances 模拟圆形隧道施工扰动下海相沉积粘土的动力特性

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-08 DOI: 10.1007/s10064-025-04408-7

Shuangxi Feng, Dongyu Ma, Huayang Lei, Jinfeng Lou

{"title":"Dynamic behavior of marine deposited clay under the simulated circular tunneling construction disturbances","authors":"Shuangxi Feng, Dongyu Ma, Huayang Lei, Jinfeng Lou","doi":"10.1007/s10064-025-04408-7","DOIUrl":"10.1007/s10064-025-04408-7","url":null,"abstract":"<div><p>The marine deposited clay will bear a series of complex stress paths caused by shield construction. This will change macroscopic and microcosmic mechanical properties of the marine deposited clay. A lot of evidence from engineering practice showed that geotechnical model parameters ignored soil stress path characteristics, leading to over- and underestimations of soil deformation and strength. Safety risks for tunnel shield construction are significantly posed. To better understand and accumulate macroscopic and microcosmic parameters of marine deposited clay under shield construction stress path, the stress path of marine deposited clay surrounding the tunnel was obtained by using the C. Kirsch analytical solution theory in this study. Scanning Electron Microscopy (SEM) and Mercury Injection Porosimetry (MIP) tests were carried out to obtain and compare the microstructure characteristics of marine deposited clay within and without shield construction stress path, and the microscopic parameters of approximate void ratio, peak aperture, probability entropy of pore orientation were quantitatively analyzed. The loading stress path was simulated by triaxial test, and the graded dynamic triaxial test was carried out to analyze the development of dynamic shear modulus and the stress–strain relationship feature. The correlations between macroscopic parameters of dynamic shear modulus, and microscopic parameters of approximate pore ratio, peak aperture, and probability entropy of pore orientation, were established, which provided a reference for revealing the microscopic deformation mechanism of marine deposited clay.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163368","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

A multi-parametric model for calculating the impact force exerted on cantilevered structures due to the collision of boulder within debris flow 基于多参数模型计算了泥石流中巨石碰撞对悬臂结构的冲击力

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-08 DOI: 10.1007/s10064-025-04407-8

Yang Chaoping, Yin Yueping, Zhang Shaojie, Wei Fangqiang, Yang Hongjuan

{"title":"A multi-parametric model for calculating the impact force exerted on cantilevered structures due to the collision of boulder within debris flow","authors":"Yang Chaoping, Yin Yueping, Zhang Shaojie, Wei Fangqiang, Yang Hongjuan","doi":"10.1007/s10064-025-04407-8","DOIUrl":"10.1007/s10064-025-04407-8","url":null,"abstract":"<div><p>Cantilevered structures, such as slit dams and piers, are vulnerable to destruction caused by boulders within debris flows. Accurately quantifying the boulder impact force within debris flow is essential for ensuring the optimal performance of these structures. Static-based models typically overestimate this force due to their failure to account for structural damping and inertia effects. In contrast, dynamic-based models that incorporate these effects are demonstrated to provide more accurate predictions. However, dynamic-based models are challenged by the difficulty in efficiently obtaining required input parameters during the engineering design process. To address these issues, an implicit multi-parametric model was developed based on similarity theory through the systematic integration of several key parameters including boulder mass, impact velocity, elastic modulus, and cross-sectional moment of inertia. A comprehensive set of numerical experiments was conducted to simulate boulder impacts on cantilevered structures, with structural bending strains being measured and subsequently input into the dynamic-based model for back-calculation of the boulder impact force. Through linear fitting of the calculated results, an explicit expression was successfully derived for the multi-parametric model. Comparative analysis revealed an accuracy loss of approximately 4% relative to the original dynamic-based model, thereby validating the model's effectiveness. The practical application of this model was demonstrated in real-world scenarios involving piers destroyed by boulders entrained in debris flow. The results indicate that the calculated impact forces not only significantly exceed the piers' fracture strength but also closely approximate empirically observed field impact forces.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163369","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

Influence of temperature on the residual shear strength of landslide soil: role of the clay fraction 温度对滑坡土残余抗剪强度的影响：粘土组分的作用

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-05 DOI: 10.1007/s10064-025-04405-w

Om Prasad Dhakal, Marco Loche, Ranjan Kumar Dahal, Gianvito Scaringi

{"title":"Influence of temperature on the residual shear strength of landslide soil: role of the clay fraction","authors":"Om Prasad Dhakal, Marco Loche, Ranjan Kumar Dahal, Gianvito Scaringi","doi":"10.1007/s10064-025-04405-w","DOIUrl":"10.1007/s10064-025-04405-w","url":null,"abstract":"<div><p>The occurrence and fate of landslides are, among other factors, controlled by the shear strength of the materials involved and by how this strength changes during the landslide process. Temperature affects the strength of pure clays according to their mineralogy, stress history, and hydro-mechanical boundary conditions. However, natural soils often consist of heterogeneous mixtures of various clay and non-clay minerals. The effect of temperature on the residual shear strength of low-plasticity soils, in particular, remains poorly understood. To address this gap, ring-shear experiments were conducted on remoulded soil samples from a landslide-prone portion of the Melamchi Catchment in Nepal. The tests were performed in water-saturated conditions under representative normal stresses (50, 100, 150 kPa) and a constant rate of shearing (0.1 mm/min). Specimens with clay fractions ranging from 10 to 24% were subjected to heating-cooling cycles (20–50–20 °C) after attaining the residual shear condition. The results were analysed statistically, and a t-test was implemented to discern possible thermal effects from the experimental noise. A decrease in residual friction angle by up to 1° upon heating (thermal weakening) was seen in specimens richer in clay under larger normal stresses. However, the effect was non-significant in many cases, suggesting a minor role of thermo-mechanical coupling in shear zones of slow-moving landslides. Further research encompassing a wider range of soil compositions is warranted to better quantify the influence of temperature on the shear strength of landslide soils.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10064-025-04405-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162450","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

Stability of cement-red soil ecological substrate slope under simulated rainfall conditions: experiment and finite element analysis 模拟降雨条件下水泥土-红壤生态基质边坡稳定性：试验与有限元分析

IF 4.2 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-07-04 DOI: 10.1007/s10064-025-04413-w

Guoliang Lin, Sen Chen, Pengpeng Jiang, Mengchen Huang, Xiaoyi Zhang, Wanxi Jiang, Aoxiang Lin, Minyi Liu

{"title":"Stability of cement-red soil ecological substrate slope under simulated rainfall conditions: experiment and finite element analysis","authors":"Guoliang Lin, Sen Chen, Pengpeng Jiang, Mengchen Huang, Xiaoyi Zhang, Wanxi Jiang, Aoxiang Lin, Minyi Liu","doi":"10.1007/s10064-025-04413-w","DOIUrl":"10.1007/s10064-025-04413-w","url":null,"abstract":"<div><p>Ecological slope protection offers a sustainable solution for mitigating rainfall-induced geotechnical failures. In this study, an ecological slope protection was constructed using an optimized ecological substrate composed of red soil, organic fertilizer, cement and wood chips in a 100: 20: 5: 15 ratio. SEM and EDS revealed that cement effectively anchors red soil, improving the stability of ecological substrate. To evaluate rainfall-induced performance, an artificial slope simulation (ASS) rainfall model with a cement-red soil ecological bag slope was developed, complemented by a small-scale finite element simulated slope (FESS) for cross-validation. The results demonstrated strong agreement between interlayer pressure measurements in the ASS and FESS numerical simulations, validating the high accuracy and feasibility of FESS. Based on the validated model, a full-scale ecological-bag slope protection FESS model was conducted on an actual slope to investigate the effects of rainfall intensity and slope gradient on stability. Under low rainfall intensity, slope gradient is the primary factor affecting the safety factor. However, increasing rainfall intensity reduces the safety factor through progressive matric suction loss. In the case study under the historical maximum rainfall intensity of 378 mm/12 h, the computed safety factor was 1.263, meeting the three-level slope safety requirements. Consequently, the optimized cement-red soil ecological substrate exhibits exceptional stability under extreme rainfall, providing a sustainable alternative to conventional slope protection systems and practical design guidelines for ecological slope engineering in rainfall-prone regions, contributing to enhanced geohazard mitigation.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161769","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