Soils and Foundations最新文献

Laboratory tests of measurement systems in pile shafts 桩井测量系统的实验室试验

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-25 DOI: 10.1016/j.sandf.2025.101663

Adam Jabłonowski , Adam Krasiński , Piotr Kanty

{"title":"Laboratory tests of measurement systems in pile shafts","authors":"Adam Jabłonowski , Adam Krasiński , Piotr Kanty","doi":"10.1016/j.sandf.2025.101663","DOIUrl":"10.1016/j.sandf.2025.101663","url":null,"abstract":"<div><div>The article describes the results of laboratory tests of reinforced concrete pile sections instrumented with several measurement systems. Compression tests were carried out on three 300-mm-by-1.2-m cylindrical pile elements, reinforced with an IPE140 steel profiles. The elements were equipped with vibrating wire sensors for measuring strains and stresses in concrete, and two elements had additional fibre optic cables installed for measuring strains. During the tests, external measurements were also made for axial force and longitudinal deformations of the elements. The aim of the research was to compare the measured values of all the internal and external systems and to evaluate the reliability of internal systems. The analysis of the measurement results showed generally good reliability of strain measurements using local vibrating wire sensors and extensometers and especially fibre optic sensors. Measurements of stresses in concrete using an internal vibrating wire sensor were unfortunately much less reliable. The reasons for the reduced reliability of the stress measurements are discussed and a correction coefficient is proposed. The conclusions state that the research and its results are valuable and useful for measuring and monitoring of foundation piles and columns purposes.</div></div>","PeriodicalId":21857,"journal":{"name":"Soils and Foundations","volume":"65 4","pages":"Article 101663"},"PeriodicalIF":3.3,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711538","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

Prediction method of screw pile bearing capacity under uplift load 上拔荷载作用下螺旋桩承载力预测方法

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-24 DOI: 10.1016/j.sandf.2025.101662

Hongwei Ma , Guoqiang Ma , Weiqiang Zhang

{"title":"Prediction method of screw pile bearing capacity under uplift load","authors":"Hongwei Ma , Guoqiang Ma , Weiqiang Zhang","doi":"10.1016/j.sandf.2025.101662","DOIUrl":"10.1016/j.sandf.2025.101662","url":null,"abstract":"<div><div>The screw threads continuously distributed along the surface of the pile significantly modify its bearing mechanism, distinguishing it from traditional column piles. Currently, methods for calculating the uplift bearing capacity of screw piles remain underdeveloped. This study presents a calculation method for the uplift bearing capacity of screw piles based on the segmented displacement coordination iterative method, as well as a prediction method for the ultimate uplift bearing capacity using the intersection convergence method. The accuracy of these methods was validated through model and field tests. Using these theoretical calculation and prediction methods, the uplift bearing characteristics and influencing factors of screw piles were analyzed. The results demonstrated that the unique screw thread structure of screw piles significantly enhances their uplift bearing capacity compared to column piles. The <em>P-s</em> curve of screw piles exhibits a slow variation characteristic, and under ultimate bearing state, the shaft resistance is primarily provided by the deeper soil layers. The ultimate uplift bearing capacity of screw piles rises initially and declines as the screw pitch increases, reaching its maximum value when the screw pitch equals the second critical screw pitch. Furthermore, as the internal friction angle increases, screw piles outperform column piles more significantly in uplift capacity.</div></div>","PeriodicalId":21857,"journal":{"name":"Soils and Foundations","volume":"65 4","pages":"Article 101662"},"PeriodicalIF":3.3,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703985","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

Geotechnical performance of the Gounokawa River levee during the 2018, 2020, and 2021 flooding events Gounokawa河堤坝在2018年、2020年和2021年洪水事件中的岩土性能

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-24 DOI: 10.1016/j.sandf.2025.101656

Mitsu Okamura , Hirotoshi Mori , Masanori Ishihara , Kenichi Maeda , Naoko Jin-nouchi , Yudai Aoyagi , Shunsuke Shinagawa , Yoshinori Yajima , Kohei Ono

{"title":"Geotechnical performance of the Gounokawa River levee during the 2018, 2020, and 2021 flooding events","authors":"Mitsu Okamura , Hirotoshi Mori , Masanori Ishihara , Kenichi Maeda , Naoko Jin-nouchi , Yudai Aoyagi , Shunsuke Shinagawa , Yoshinori Yajima , Kohei Ono","doi":"10.1016/j.sandf.2025.101656","DOIUrl":"10.1016/j.sandf.2025.101656","url":null,"abstract":"<div><div>Significant sand ejecta repeatedly appeared during the 2018, 2020, and 2021 flooding events at the Gounokawa River levee in the Shimonohara district of Shimane Prefecture, Japan. Detailed site investigations were conducted, including the recording of a local resident’s eyewitness account, soil borings, electric resistivity tomography, and trench excavations. These methods clarified the event timelines, foundation soil profiles, and origins of the sand ejecta. Topographic changes, analyzed using digital elevation models derived from unmanned aerial vehicle photogrammetry, were used to determine whether backward erosion piping (BEP) had occurred. It was confirmed that high water pressure had propagated through the gravel layer and had broken through the overlying layers. Sand volcanoes formed in locations where an underlying gravel layer had existed and ground surface elevations had been low. The water head difference across the levee, when the sand boiling began, was estimated fairly accurately. This provided a valuable opportunity to verify the validity of the methods used to predict the initiation of sand boiling and BEP. The head difference was the highest in the 2018 event and decreased in the subsequent events. Despite the large amount of sand ejecta, no ground surface subsidence was observed. A grain-size distribution analysis revealed that the underlying gravel contained an unstable sand fraction, and thus, was suffusive. Most of the large amount of sand ejecta is considered to have originated from the gravel layer. Detailed trench wall observations facilitated the development of a scenario describing the ground deformation and sand-clod formation during the repeated flooding events.</div></div>","PeriodicalId":21857,"journal":{"name":"Soils and Foundations","volume":"65 4","pages":"Article 101656"},"PeriodicalIF":3.3,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694929","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

Embankment vibration characteristics using ground motion records and ambient noise measurements, Briones Dam, California 使用地面运动记录和环境噪声测量的路堤振动特性，Briones大坝，加利福尼亚

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-23 DOI: 10.1016/j.sandf.2025.101664

Makbule Ilgac , Adda Athanasopoulos-Zekkos , Chukwuebuka Chukwuemeka Nweke , Olga-Joan Ktenidou , Kyle Peterson , Robert E. Kayen

{"title":"Embankment vibration characteristics using ground motion records and ambient noise measurements, Briones Dam, California","authors":"Makbule Ilgac , Adda Athanasopoulos-Zekkos , Chukwuebuka Chukwuemeka Nweke , Olga-Joan Ktenidou , Kyle Peterson , Robert E. Kayen","doi":"10.1016/j.sandf.2025.101664","DOIUrl":"10.1016/j.sandf.2025.101664","url":null,"abstract":"<div><div>Investigating the seismic response of earth embankment dams is crucial for assessing the safety of existing dams and guiding new design procedures. The dam fundamental frequency (<em>f<sub>0</sub></em>) is a critical parameter in the dynamic response of dams and can be evaluated using seismic recordings through Horizontal-to-Vertical Spectral Ratio (HVSR) and Standard Spectral Ratio (SSR) methods. This study focuses on assessing the vibration characteristics of Briones Dam, a <em>78 m-tall</em> earth embankment dam located in the Bay Area in Northern California. First, earthquake-based Horizontal-to-Vertical Spectral Ratio (eHVSR) was estimated by dividing the horizontal records by the vertical components, and the SSR was determined by comparing crest recordings with those from the abutment. Additionally, a field test program was conducted to collect ambient noise measurements at Briones Dam, allowing for the calculation of microtremor-based HVSR. The fundamental frequency was estimated using three empirical methods: mHVSR (<em>0.7</em>–<em>1 Hz</em>), eHVSR (<em>0.9</em>–<em>1.1 Hz</em>), and SSR (<em>1.2 Hz</em>). The median fundamental frequency of the dam is estimated to be approximately <em>1 Hz</em> at the center of the dam crest. The slight variations among these three methods suggest the need for further investigations that consider the geological and geotechnical conditions of the dam.</div></div>","PeriodicalId":21857,"journal":{"name":"Soils and Foundations","volume":"65 4","pages":"Article 101664"},"PeriodicalIF":3.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694927","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

Levee vulnerability assessment using an integrated unsaturated transient seepage model, sensitivity analysis, and fragility curves 综合非饱和暂态渗流模型、敏感性分析和易损性曲线的堤坝易损性评价

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-23 DOI: 10.1016/j.sandf.2025.101658

E. Ajorlou, M. Ghayoomi

{"title":"Levee vulnerability assessment using an integrated unsaturated transient seepage model, sensitivity analysis, and fragility curves","authors":"E. Ajorlou, M. Ghayoomi","doi":"10.1016/j.sandf.2025.101658","DOIUrl":"10.1016/j.sandf.2025.101658","url":null,"abstract":"<div><div>The accelerated changes in climate resulting in more frequent and disruptive floods necessitate broader perspectives of levee vulnerability assessment. This paper aims to advance levee vulnerability curves using global sensitivity analysis to identify critical inputs for developing multi-variable fragilities. This analysis is efficient and effective for skewed data such as extreme precipitation. The study categorizes inputs into geometry, precipitation, and soil characteristics, generating 30,000 scenarios for analysis. A transient unsaturated seepage analysis is conducted to examine different failure modes such as piping, erosion, and overflow, as well as erosion initiation and enlargement time and locations for each scenario. Results show that, in addition to the initial upstream water level and precipitation characteristics, soil properties—such as gravel and clay content, along with water retention parameters—are crucial for developing fragility curves across different soil types. Additionally, comparing fragility curves for historical data and future precipitation projections highlights the importance of integrating these projections into levee risk analysis for the next 30 years. As a practical implication, these fragility curves are applied to calculate failure probabilities for a levee case study. This research would support the integration of levee vulnerability assessments with social factors and stakeholder perspectives which also increases the applicability of fragility functions in flood risk mitigation.</div></div>","PeriodicalId":21857,"journal":{"name":"Soils and Foundations","volume":"65 4","pages":"Article 101658"},"PeriodicalIF":3.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694928","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

Direct shear testing of frozen soil-structure interface under high normal stress and frozen-thawing conditions 高正应力和冻融条件下冻土-结构界面的直剪试验

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-21 DOI: 10.1016/j.sandf.2025.101660

Bo Wang , Zhi-qiang Liu , Yu Bao

引用次数: 0

Experimental analysis of reinforcement methods for stone column foundations 石柱基础加固方法试验分析

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-18 DOI: 10.1016/j.sandf.2025.101661

Lihua Li , Jinlin Li , Zhiqi Zhan , Yilin Gui , Juqiang Liu

{"title":"Experimental analysis of reinforcement methods for stone column foundations","authors":"Lihua Li , Jinlin Li , Zhiqi Zhan , Yilin Gui , Juqiang Liu","doi":"10.1016/j.sandf.2025.101661","DOIUrl":"10.1016/j.sandf.2025.101661","url":null,"abstract":"<div><div>Geosynthetic-reinforced stone columns can significantly improve weak foundations. While previous studies have focused on the individual effects of vertical or horizontal reinforcement, the combined influence of both on stone column foundation performance remains poorly understood. Through physical model tests, this study investigated the effects of various reinforcement methods on the bearing capacity and deformation characteristics of stone column foundations, with a particular focus on the combined reinforcement in enhancing their performance, addressing this research gap. This study encompasses different enhancement lengths, horizontal reinforcement spacings, and combinations of reinforcement methods. Experimental results demonstrate that geosynthetics significantly limit radial deformation and improve the bearing capacity of stone column foundations. Notably, the bearing capacity increases with reduced reinforcement spacing and extended enhancement length. Among all the reinforcement types tested in this study, the full-length (L) vertical reinforcement demonstrated the most significant impact. Additionally, the study examines stress transfer and lateral stress distribution within the stone columns, revealing that as the load increases, the stress ratio at the stone column base and lateral stress rises, with lateral stress peaking at a depth of 2.5D from the surface. This behaviour aligns with the deformation patterns observed in the model tests.</div></div>","PeriodicalId":21857,"journal":{"name":"Soils and Foundations","volume":"65 4","pages":"Article 101661"},"PeriodicalIF":3.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662699","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

Seismic response of embankment dams: Shear beam analysis vs field observations 路堤坝的地震反应：剪力梁分析与现场观测

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-15 DOI: 10.1016/j.sandf.2025.101654

Krishna Santhosh , Tadahiro Kishida , George Mylonakis

引用次数: 0

Reliability based seismic slope failure assessment of a high concrete face rockfill dam close to an active fault zone 靠近活动断裂带的高面板堆石坝地震边坡破坏可靠度评估

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-15 DOI: 10.1016/j.sandf.2025.101653

Ugur Safak Cavus , Murat Kilit

{"title":"Reliability based seismic slope failure assessment of a high concrete face rockfill dam close to an active fault zone","authors":"Ugur Safak Cavus , Murat Kilit","doi":"10.1016/j.sandf.2025.101653","DOIUrl":"10.1016/j.sandf.2025.101653","url":null,"abstract":"<div><div>This study assesses the earthquake-induced failure risks of the upstream and downstream slopes of a concrete face dam (CFRD), which is under the influence of a nearby active fault, using the reliability-based analysis method. For this purpose, peak ground accelerations (PGAs) that may occur at the dam site were calculated probabilistically and their contribution to the sliding risks of dam slopes was determined in accordance with the conditional probability theorem. Upstream and downstream slopes of CFRDs are usually conventionally designed as 1.3–1.5H:1V and 1.3–1.6H:1V, respectively throughout the world. Such slope design is considered sufficient for almost every case. The findings of this study are fully applicable and very important for the structural design of all concrete-faced rockfill dams (CFRDs) worldwide. Since, the slope design of CFRDs is similar and usually traditionally (1.3–1.5H; 1V for upstream slope and 1.4–1.6H:1V for downstream slope). However, this study proves that only conventional upstream slope design (1.3–1.5H:1V) can be safe for even very high peak ground accelerations (PGAs) occurring due to a nearby active fault, but contrary to expectations, downstream slope of CFRDs cannot be sufficiently safe and maintain its slope sliding safety when PGAs reach high levels. When the critical PGA level is exceeded, the downstream slope carries the risk of losing its stability with high probability, as emphasized in this study. Therefore, this study provides a new design strategy and extremely important information for dam design engineers which is to design a rather flatter downstream slope such as 1 vertical to 1.8–2.0 horizontal or, instead, to design a downstream rockfill berm supporting conventional design if CFRDs are to be built in high seismic hazard potential areas or close to active faults. Suggested such type of designs will be economical and sufficiently safe.</div></div>","PeriodicalId":21857,"journal":{"name":"Soils and Foundations","volume":"65 4","pages":"Article 101653"},"PeriodicalIF":3.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633086","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

Behaviour of a sandy silt gold tailings under drained simple shear loading in a torsional shear hollow cylinder apparatus 砂质粉砂金尾矿在排水单剪荷载作用下的扭剪空心圆筒试验研究

IF 3.3 2区工程技术

Soils and Foundations Pub Date : 2025-07-14 DOI: 10.1016/j.sandf.2025.101635

Riccardo Fanni , David Reid , Andy Fourie

{"title":"Behaviour of a sandy silt gold tailings under drained simple shear loading in a torsional shear hollow cylinder apparatus","authors":"Riccardo Fanni , David Reid , Andy Fourie","doi":"10.1016/j.sandf.2025.101635","DOIUrl":"10.1016/j.sandf.2025.101635","url":null,"abstract":"<div><div>Experimental results are presented in this technical paper to investigate the mechanisms of plane strain consolidation and drained shearing typical of below slope conditions. Five torsional shear hollow cylinder tests were conducted on a sandy silt gold tailings, where consolidation was performed under at-rest (<em>K<sub>0</sub></em>) conditions, and by applying a horizontal shear stress, while maintaining plane strain conditions. The tests were carried out under drained simple shear conditions (strain controlled) on tailings specimens prepared in loose and dense states and along a constant shear stress drained stress path (stress controlled) on a loose specimen, using an automated computer-controlled testing procedure. The evolution of static stresses in the loose and dense specimens during principal stress rotation, while maintaining plane strain conditions, were examined. These tests provide valuable insights into the behavior of tailings under plane strain conditions, contributing to the calibration of numerical models for slope analysis and more broadly for plane strain problems.</div></div>","PeriodicalId":21857,"journal":{"name":"Soils and Foundations","volume":"65 4","pages":"Article 101635"},"PeriodicalIF":3.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614046","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