Engineering Geology最新文献_第4页

Erosion processes in dry granular rock-ice avalanches with varying ice content: Insights from flume experiments 具有不同冰含量的干颗粒岩冰雪崩的侵蚀过程：来自水槽实验的见解

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-14 DOI: 10.1016/j.enggeo.2026.108566

Liyang Jiang, Xuanmei Fan, Junhan Du, Yu Deng, Zeyuan Xue

{"title":"Erosion processes in dry granular rock-ice avalanches with varying ice content: Insights from flume experiments","authors":"Liyang Jiang, Xuanmei Fan, Junhan Du, Yu Deng, Zeyuan Xue","doi":"10.1016/j.enggeo.2026.108566","DOIUrl":"10.1016/j.enggeo.2026.108566","url":null,"abstract":"<div><div>Rock-ice avalanches in cold regions exhibit formidable erosive power, posing severe threats to nearby communities and infrastructure. Yet, the role of ice content in erosion remains poorly understood largely due to the limited field and experimental data. Here, we present a series of temperature-controlled flume experiments to systematically investigate erosion dynamics in dry granular rock-ice mixtures of varying ice contents (0–100%). Through high-speed flow visualization of a specially designed erosion column, we record the full spatiotemporal progression of the erosion profiles. Further analysis identifies two coexisting erosion mechanisms: basal abrasion and impact erosion. Basal abrasion is produced by sustained shearing along the bed, whereas impact erosion arises from high-velocity particle collisions with the bed. Their respective contributions are also quantified. Notably, impact erosion shows a stronger correlation with erosion capacity than basal abrasion and contributes more to total erosion under high-mobility conditions. A dimensionless parameter <em>R</em><sub><em>E</em></sub> = <em>E</em><sub><em>i</em></sub>/<em>E</em><sub><em>a</em></sub> is introduced to quantify the intensity of the impact erosion rate <em>E</em><sub><em>i</em></sub> relative to the basal abrasion rate <em>E</em><sub><em>a</em></sub>. <em>R</em><sub><em>E</em></sub> first increases and then decreases with ice content, peaking at intermediate values. These findings advance the quantitative understanding of basal abrasion and impact erosion in rock-ice avalanches under dry granular conditions.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108566"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Excess pore water pressure generation of saturated uncemented coral sands under non-proportional loading 非比例加载下饱和非胶结珊瑚砂超孔隙水压力的产生

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-15 DOI: 10.1016/j.enggeo.2026.108569

Liguo Jin , Xiaoxiao Bai , Bingbing Jing , Kai Zhao , Xiaojun Li , Guoxing Chen

{"title":"Excess pore water pressure generation of saturated uncemented coral sands under non-proportional loading","authors":"Liguo Jin , Xiaoxiao Bai , Bingbing Jing , Kai Zhao , Xiaojun Li , Guoxing Chen","doi":"10.1016/j.enggeo.2026.108569","DOIUrl":"10.1016/j.enggeo.2026.108569","url":null,"abstract":"<div><div>Modeling the cyclic behavior of saturated coral sand under non-proportional loading condition is still an challenging task in practice, due to the fabric anisotropy of coral sands. This paper presents an experimental studies on the drained shear-volume coupling behavior of saturated coral sand under wave-induced non-proportional loading. Through an automated hollow cylinder apparatus, the wave-induced stress path is inherent non-proportional characterized by simultaneous variations in magnitudes and directions of the principal stress. The results indicate that the drained shear-volume coupling behavior of coral sand is highly dependent on the imposed stress paths. A remarkable finding is that by defining equivalent cyclic stress ratio (ESR) as a new proxy, a unique shear-volume coupling equation can be established for the various stress paths studied. An explicit relationship is then proposed and implemented into Biot's equation as the source term for residual excess pore water pressure (EPWP) generation within an explicit time-matching finite difference platform. The proposed model is validated against the comparative undrained liquefaction test on saturated coral sand and siliceous Ottawa sand in the laboratory, as well as the data of siliceous fine sands in previous work. Finally, the potential of the proposed modeling framework is highlighted to capture the key mechanisms of wave-induced liquefaction of coral sand seabed through numerical examples. The proposed shear-volume coupling equation provides new insights into the physics of seabed liquefaction of coral sand under wave-induced non-proportional loading conditions.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108569"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of static liquefaction landslides in loess: Integrating triaxial shear parameters into the sliding-block model 黄土静力液化滑坡预测：将三轴剪切参数纳入滑块模型

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-08 DOI: 10.1016/j.enggeo.2026.108549

Fanyu Zhang , Jianbing Peng , Yixiao Zhang , Yapeng Wang , Tongwei Zhang

{"title":"Prediction of static liquefaction landslides in loess: Integrating triaxial shear parameters into the sliding-block model","authors":"Fanyu Zhang , Jianbing Peng , Yixiao Zhang , Yapeng Wang , Tongwei Zhang","doi":"10.1016/j.enggeo.2026.108549","DOIUrl":"10.1016/j.enggeo.2026.108549","url":null,"abstract":"<div><div>Static liquefaction landslides are among the most catastrophic geohazards, causing severe casualties and damage worldwide. The rapid mobility of this kind of landslide is the most spectacular in the Chinese Loess Plateau (CLP). However, it has been challenging to accurately predict initiation and failure in static liquefaction loess landslides. Here, we conduct a series of undrained triaxial compression tests on undisturbed and remolded loess samples in CLP, compiling a comprehensive database of undrained triaxial compression tests on saturated loess that combines current and published triaxial tests. Based on the database, we analyze the relationship between the normalized stress ratio and pore water pressure ratio within a stress state framework, then obtain two fitted parameters at the instability and failure points. The two ratios and the fitted parameters are integrated into the limit equilibrium equation to build a sliding-block model. The model accurately predicts the factor of safety against initiation and failure of eight static liquefaction loess landslides and one unfailed loess slope. The scanning electron microscope images and grain size distribution confirm that the packing structure affects shear behavior and the critical state locus in triaxial tests. Pore water pressure and boundary parameters in landslides are more sensitive to changes than those parameters extracted from the triaxial laboratory in the sliding-block model. Finally, we develop a hydro-mechanical coupling criterion for predicting the instability and failure of future static liquefaction landslides. These results show that the novel sliding-block model bridges the gap between triaxial shear parameters and slope field stability conditions. Our findings indicate that the model can serve as an effective method for predicting static liquefaction landslides in loess and other soil types.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108549"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145957214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantifying groundwater level variability and annual slope failure probability using multi-year groundwater level observations 利用多年地下水位观测量化地下水位变化和年度边坡破坏概率

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-23 DOI: 10.1016/j.enggeo.2026.108584

Dianqing Li , Junjie Wang , Yu Wang , Xin Liu

{"title":"Quantifying groundwater level variability and annual slope failure probability using multi-year groundwater level observations","authors":"Dianqing Li , Junjie Wang , Yu Wang , Xin Liu","doi":"10.1016/j.enggeo.2026.108584","DOIUrl":"10.1016/j.enggeo.2026.108584","url":null,"abstract":"<div><div>The variation in groundwater level (GL) has been recognized as an important triggering factor of landslides and often exhibits high uncertainty. Most existing slope reliability analysis and landslide risk assessment studies ignored the uncertainty of GL and focused on estimating slope failure probability that is not related to a time period. This study proposes a rigorous method for quantifying the annual failure probability (<em>P</em><sub><em>FA</em></sub>) of slopes considering both uncertainties in GL and soil properties. Multi-year groundwater monitoring data are utilized to quantify the annual exceedance probability of GL through a statistical analysis. A series of GL scenarios corresponding to different return periods or exceedance probabilities is generated and used to estimate the corresponding conditional slope failure probabilities. These conditional probabilities are combined using the Total Probability Theorem to estimate <em>P</em><sub><em>FA</em></sub>. The results from a real slope indicate that the conditional slope failure probability increases exponentially as GL rises. The variability in GL dominates <em>P</em><sub><em>FA</em></sub> when the variability of soil properties is relatively low (e.g., coefficient of variation, COV = 0.1). Conversely, when the variability of soil properties is relatively high (e.g., COV ≥ 0.3), <em>P</em><sub><em>FA</em></sub> is dominated by soil uncertainties, and the conditional failure probability becomes insensitive to GL fluctuations. This highlights the importance of monitoring groundwater conditions in quantifying and mitigating landslide risks. Preliminary validation indicates that GL scenarios corresponding to a return period of 10 to 15 years can be used as representative GL conditions for evaluating <em>P</em><sub><em>FA</em></sub>, offering a practical guidance for slope design engineering.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108584"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lithology dependent pathways of forming rock mass weakness plane shape regional landslide susceptibility 岩体软弱面形成的岩性依赖路径决定了区域滑坡易感性

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-23 DOI: 10.1016/j.enggeo.2026.108586

Yifan Zhang , Zhenni Jiang , Chunhao Wu , Peng Cui , Weilin Kong , Yusheng Li , Shujian Yi

{"title":"Lithology dependent pathways of forming rock mass weakness plane shape regional landslide susceptibility","authors":"Yifan Zhang , Zhenni Jiang , Chunhao Wu , Peng Cui , Weilin Kong , Yusheng Li , Shujian Yi","doi":"10.1016/j.enggeo.2026.108586","DOIUrl":"10.1016/j.enggeo.2026.108586","url":null,"abstract":"<div><div>Rock mass weakness planes are mechanically unfavored discontinuities that control slope stability. However, their spatial pattern is poorly understood, limiting advances in regional landslide assessment. In this study, we propose a multi-explainable machine learning framework to predict the distribution of weakness planes and quantify their contribution to landslides. Focusing on southeastern Tibet, the study investigates 194 field outcrops of rock mass weakness planes, integrating geological section comparisons and driving factor analyses to reveal spatial heterogeneity and the evolvement of weakness plane. Rock mass weakness planes are denser in lithologically weak and structurally damaged rock masses, and less developed in gentler, sparsely faulted terrains. Comparative analysis of geological sections indicates that pre-existing discontinuities are essential preconditions for developing weakness planes, whereas precipitation acts as an activator. The controlling factors vary with lithology, indicating that material and structure govern how efficiently exogenic processes transform discontinuities into weakness planes. By considering weakness plane during susceptibility assessment, performances were improved (Recall increased by 4.6–6.8%, AUC increased by 3.1–5.6%). This work constructs the regional-scale model for continuous prediction of rock mass weakness planes. It links lithology-dependent formation mechanisms of rock mass weakness plane to slope instability, providing a process-based framework for interpreting landslide development and improving landslide susceptibility assessment.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108586"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Field and numerical investigations of canal damage characteristics and mechanisms under coupled drying-wetting and freezing-thawing cycles 干湿-冻融耦合循环条件下渠系损伤特征及机理的现场与数值研究

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.enggeo.2026.108587

Haoyuan Jiang , Mingyi Zhang , Zhengzhong Wang , Wansheng Pei , Jianrui Ge , Zhengyi Wang

{"title":"Field and numerical investigations of canal damage characteristics and mechanisms under coupled drying-wetting and freezing-thawing cycles","authors":"Haoyuan Jiang , Mingyi Zhang , Zhengzhong Wang , Wansheng Pei , Jianrui Ge , Zhengyi Wang","doi":"10.1016/j.enggeo.2026.108587","DOIUrl":"10.1016/j.enggeo.2026.108587","url":null,"abstract":"<div><div>Canals are essential for water transfer in cold and arid regions. However, they are vulnerable to damage under drying-wetting and freezing-thawing cycles, with wetting during freezing–thawing periods significantly intensifying frost damage. Yet, the underlying mechanisms involving heat-water-deformation interactions remain insufficiently quantified. This study employs field monitoring to investigate temperature, water content, and deformation behaviors in canals. Then, a coupled water-heat numerical model incorporating seepage effects was developed and applied to analyze how leakage increases soil moisture and exacerbates frost damage. Results show that canal temperatures are controlled by water temperature and leakage during water supply, and by air temperature and solar radiation during water cut-off, with freeze–thaw transitions further modulating thermal behavior. Shady slopes freeze more readily, whereas sunny slopes experience greater evaporative loss. Spring irrigation sharply lowers the 0 °C isotherm below water level, triggering peak frost heave at its onset, followed by rapid thawing. Frost heave is lowest on sunny slopes and greatest at mid-shady slopes, with maximum differences exceeding sixfold. After thawing, minor slippage occurs on shady slopes, while sunny slopes remain stable. Canal frost damage is driven by elevated soil water from leakage and winter irrigation, as well as sharp thermal imbalances induced by spring irrigation and solar radiation disparities between slopes. Preserving the integrity of anti-seepage systems proves more effective in mitigating frost damage than early termination of winter irrigation. This study provides the first integrated field-based and modeling evidence on frost damage mechanisms in cold-arid canals, establishing a scientific foundation for mitigation strategies.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108587"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A simple TDR waveform analysis for estimating volumetric water content in marine clays 估算海相粘土体积含水量的简单TDR波形分析

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-18 DOI: 10.1016/j.enggeo.2026.108567

Won-Taek Hong , Eun Sang Lee , Hyojung Ko , Wooseok Choi , Hyunwook Choo

{"title":"A simple TDR waveform analysis for estimating volumetric water content in marine clays","authors":"Won-Taek Hong , Eun Sang Lee , Hyojung Ko , Wooseok Choi , Hyunwook Choo","doi":"10.1016/j.enggeo.2026.108567","DOIUrl":"10.1016/j.enggeo.2026.108567","url":null,"abstract":"<div><div>In electrically conductive media such as marine clays, the strong attenuation of electromagnetic (EM) wave energy significantly complicates the determination of travel time, limiting the applicability of traditional time domain reflectometry (TDR) methods for estimating volumetric water content. This study presents an alternative approach that utilizes characteristic voltages in TDR waveforms—specifically, the normalized voltage ratio (<em>V</em><sub><em>f</em></sub>/<em>V</em><sub><em>0</em></sub>)—to estimate the volumetric water content (<em>θ</em><sub><em>v</em></sub>) and electrical conductivity of marine clays; this approach can be applied even when travel time cannot be determined. Laboratory experiments were conducted on kaolin and bentonite clays with <em>θ</em><sub><em>v</em></sub> between 26.9 and 86.8%, saturated with a 0.5 M NaCl solution. The results show that, for both clay types, <em>V</em><sub><em>f</em></sub>/<em>V</em><sub><em>0</em></sub> was highly sensitive to changes in <em>θ</em><sub><em>v</em></sub> and strongly correlated with bulk electrical conductivity, regardless of their mineralogical differences. Empirical relationships were developed to estimate <em>θ</em><sub><em>v</em></sub> for each clay, and a generalized model applicable to tested clays with <em>θ</em><sub><em>v</em></sub> > 50% was proposed, achieving a mean absolute percentage error of 2.5%. This study demonstrates that waveform-based analysis using characteristic voltages can serve as a reliable alternative to traditional travel time-based TDR techniques, thereby expanding the applicability of TDR in highly conductive saline environments such as marine clays.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108567"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning approaches to predicting the uniaxial compressive strength of granite from image-derived mineralogical features 从图像矿物学特征预测花岗岩单轴抗压强度的机器学习方法

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-19 DOI: 10.1016/j.enggeo.2026.108571

Changdi He , Brijes Mishra , Yuan Li , Jessica Michelle Wempen

{"title":"Machine learning approaches to predicting the uniaxial compressive strength of granite from image-derived mineralogical features","authors":"Changdi He , Brijes Mishra , Yuan Li , Jessica Michelle Wempen","doi":"10.1016/j.enggeo.2026.108571","DOIUrl":"10.1016/j.enggeo.2026.108571","url":null,"abstract":"<div><div>This study uses machine learning (ML) models to predict the numerically simulated uniaxial compressive strength (UCS) of granite directly from digital images. Specifically, the images were processed using an in-house Digital Image Processing (DIP) tool to estimate mineralogical features (used as input features for the ML models), including mineral content, grain size, and spatial distribution. Mineral content and distribution were quantified using <span><math><mi>m</mi></math></span>-harmonic Fourier series equations, whereas mineral grain size was determined using the 4-connectivity method. The target UCS values were derived from the 2D physically informed Subspring Network Breakable Voronoi (SNBV) microstructural models, replicating the mineralogical features observed in the granite images. Extreme Gradient Boosting (XGBoost) models with different input combinations and hyperparameter optimization methods were trained and evaluated on 126 granite images using a single train/test split and repeated 5-fold cross-validation. Results indicate that the input combination of mineral content, grain size, and spatial distribution parameters from <span><math><mi>m</mi></math></span>-harmonic Fourier series combined with SHapley Additive Explanations (SHAP)-based feature selection, yield the best and robust performance, whereas increasing the harmonic order has a limited effect on accuracy. Among the tested optimization methods, the Optuna–XGBoost model achieved the best performance. In addition, UCS prediction is controlled mainly by the content and grain size of biotite and plagioclase, while the corresponding attributes of quartz/K-feldspar, as well as overall mineral distribution play a comparatively minor role.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108571"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil characterization through shear wave velocity analysis of Lucknow city in the Indo-Gangetic plain of India 印度恒河平原勒克瑙市剪切波速分析土壤特征

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-17 DOI: 10.1016/j.enggeo.2026.108548

P. Sivasankar , K. Satish Kumar , K. Swapna Sri , P. Pavan Kishore , G.S. Srinivas , P. Shiva Shankar , Anand K. Pandey , D. Srinagesh , T. Seshunarayana

{"title":"Soil characterization through shear wave velocity analysis of Lucknow city in the Indo-Gangetic plain of India","authors":"P. Sivasankar , K. Satish Kumar , K. Swapna Sri , P. Pavan Kishore , G.S. Srinivas , P. Shiva Shankar , Anand K. Pandey , D. Srinagesh , T. Seshunarayana","doi":"10.1016/j.enggeo.2026.108548","DOIUrl":"10.1016/j.enggeo.2026.108548","url":null,"abstract":"<div><div>Shear wave velocity (Vs) of a medium depends on shear modulus, an essential parameter in geotechnical engineering applications that helps understand soil deformation under dynamic loading during earthquake shaking. We carried out Multichannel Analysis of Surface Waves (MASW) surveys to characterise geotechnical parameters of the shallow subsurface soil in Lucknow, Uttar Pradesh, a fast-growing urban city on the banks of Gomati and Sai rivers in the central Indo-Gangetic Plain (IGP), and lies to the south of the central seismic gap region in the Himalayan collision zone. The V<sub>S</sub> profiles are acquired at 191 locations across the Lucknow region, exploring up to ∼50 m depth in the thick alluvial soil. The analysis of 1D, 2D, and 3D shear wave velocity profiles suggests (i) average shear wave velocities (Vs<sup>30</sup>) vary from 226 m/s to 480 m/s throughout the study region. (ii) Long-range swapped 2D cross-sectional profiles reflect the geometry of the Gomati and Sai rivers up to a depth of 50 m. (iii) Very low V<sub>S</sub> values are observed along the Gomati and Sai river banks. (iv) Most of the soil in the study area is stiff soil of class C, accordingly to the Eurocode 8 classification, with stiffness varying from ∼100 KPa to 400 KPa. (v) The estimated soil predominant frequencies, amplifications, and Peak Ground Acceleration (PGA) vary from 1.9 Hz – 4.0 Hz, 1.4–3.7, and 0.04 g to 0.09 g, respectively.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108548"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seismic analysis of a zoned earth dam after decades of operation 某带状土坝运行数十年的地震分析

IF 8.4 1区工程技术

Engineering Geology Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI: 10.1016/j.enggeo.2026.108559

Mariagrazia Tretola , Lucia Coppola , Stefania Sica , Luca Pagano

{"title":"Seismic analysis of a zoned earth dam after decades of operation","authors":"Mariagrazia Tretola , Lucia Coppola , Stefania Sica , Luca Pagano","doi":"10.1016/j.enggeo.2026.108559","DOIUrl":"10.1016/j.enggeo.2026.108559","url":null,"abstract":"<div><div>The seismic safety assessment of zoned earth dams that have been in operation for several decades requires a preliminary evaluation of their pre-seismic behavior through the interpretation of monitoring data and laboratory tests on construction materials, collected throughout the dam's service life. Once it is verified whether any factors have influenced the dam's performance and whether this behavior remains consistent with the original design expectations, the seismic response can be analyzed using either pseudo-dynamic (Newmark-based) or coupled elastoplastic continuum approaches. The most relevant damage mechanisms are those affecting watertightness. Zoned earth dams may develop seismic-induced fractures resulting from sliding through the core or from stress release associated with distributed deformation. Coupled analyses provide fundamental physical insight into the processes governing hydraulic fracturing under both seismic and post-seismic conditions, while pseudo-dynamic methods offer valuable information on potential sliding mechanisms and on whether failure surfaces are likely to propagate through the core. The integration of these two approaches enables a deeper understanding of core vulnerability and improves the overall reliability of seismic safety evaluations. This study explores these aspects through the analysis of the Conza Dam in Italy—a unique case where a major earthquake occurred during construction, and where comparative testing of original and recent materials revealed progressive changes in properties over decades of operation. The combined application of pseudodynamic and coupled dynamic analyses to this case demonstrates their complementarity and effectiveness in predicting potential earthquake-induced damage.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"363 ","pages":"Article 108559"},"PeriodicalIF":8.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0