Proceedings of the Institution of Civil Engineers - Geotechnical Engineering最新文献

Evaluation of sand subgrade seepage erosion caused by buried pipeline leakage 对埋地管道泄漏造成的砂土路基渗流侵蚀的评估

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2024-06-03 DOI: 10.1680/jgeen.23.00133

Wenxin Chen, Yekai Chen, Zhihang Su, Liyuan Zhao, Xianghua Chen

{"title":"Evaluation of sand subgrade seepage erosion caused by buried pipeline leakage","authors":"Wenxin Chen, Yekai Chen, Zhihang Su, Liyuan Zhao, Xianghua Chen","doi":"10.1680/jgeen.23.00133","DOIUrl":"https://doi.org/10.1680/jgeen.23.00133","url":null,"abstract":"Leakage from buried pipelines can lead to an increase in the water content of the subgrade soils and a rise in the water table, leading to soil loosening, erosion, and ultimately the formation of hidden voids and roadway collapses. This study presents a Discrete Element Method (DEM) and validates its accuracy by utilizing cavity data from model experiments. It investigates the mechanism of seepage erosion resulting from pipe leakage and analyzes the development of the soil arch effect. Furthermore, it discusses the influence of sand void ratio and particle size on sand seepage erosion. The results indicate that the erosion area is primarily affected by the void ratio and particle size. In comparison to soil particles ranging from 0.1 mm to 5 mm and 2 mm to 5 mm, those with sizes between 0.1 mm and 2 mm generate areas of erosion and loosening that are approximately 40% larger. The proposed model offers a precise analysis of the developmental process and the extent of seepage erosion, thereby contributing to the prediction of potential road cavity areas based on dynamic changes in key factors such as subgrade soil type and groundwater level.","PeriodicalId":509438,"journal":{"name":"Proceedings of the Institution of Civil Engineers - Geotechnical Engineering","volume":"12 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of energy transfer and stress wave propagation during SPT through energy measurement and PIV 通过能量测量和 PIV 研究 SPT 过程中的能量传递和应力波传播

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2024-06-02 DOI: 10.1680/jgeen.23.00320

E. Wong, E. H. Y. Sze, P. W. K. Chung, L. N. Y. Wong

{"title":"Study of energy transfer and stress wave propagation during SPT through energy measurement and PIV","authors":"E. Wong, E. H. Y. Sze, P. W. K. Chung, L. N. Y. Wong","doi":"10.1680/jgeen.23.00320","DOIUrl":"https://doi.org/10.1680/jgeen.23.00320","url":null,"abstract":"The blow counts in standard penetration tests (SPT) require suitable corrections to account for energy losses. Over 4,000 energy measurement data collected from four test sites across Hong Kong have been collected and analysed in this study. On average for all instrumented hammer blows, approximately 62% of the theoretical hammer potential energy is transferred to the drill rod assembly. Using high-speed camera imagery and particle image velocimetry (PIV), the detailed mechanism of stress wave propagation has been visualised and assessed. This has revealed new details and allowed nuances in the results of routine energy measurements to be interpreted in new light. It has been confirmed that the initial compressive wave is reflected as a tensile wave for low end-restraint at the SPT sampler and as a second compressive wave for high end-restraint. The commonly observed discrepancy between the theoretical and measured speeds of wave propagation is highlighted and explored. Energy loss arises from friction during free-fall of the hammer, at the anvil, and from other sources such as the horizontal motion of the hammer-anvil system. The proportion of each major source of energy loss is quantified.","PeriodicalId":509438,"journal":{"name":"Proceedings of the Institution of Civil Engineers - Geotechnical Engineering","volume":"43 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A nonlinear stress-strain relationship for soil and rock 土壤和岩石的非线性应力应变关系

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2024-03-27 DOI: 10.1680/jgeen.22.00108

Gary Norris, Horng-Jyh Yang

{"title":"A nonlinear stress-strain relationship for soil and rock","authors":"Gary Norris, Horng-Jyh Yang","doi":"10.1680/jgeen.22.00108","DOIUrl":"https://doi.org/10.1680/jgeen.22.00108","url":null,"abstract":"While many employ a hyperbolic stress-strain relationship for soils, it is known that such a relationship is accurate over either the small strain range as encountered in earthquake and soil dynamics problems or a relationship with different input parameters that are needed over large strains as is required for finite element analyses of large deformation behavior. The two characterizations do not become one. A proposed power relationship is presented that was developed to characterize the triaxial test stress-strain behavior of cohesionless material from lubricated or “frictionless” cap and base tests (some 144 tests) covering a range in the natural variation in particle size, particle shape and surface roughness, over low to high confining pressure. This relationship covers the range in strain from 10−6 to soil failure. It has been used successfully to date in laterally loaded pile response characterization (the Strain Wedge Model) and shallow foundation load-settlement-bearing capacity response. Most recently, it has been extended to assess the behavior of rock-like material (caliche). The relationship and its comparison with the hyperbolic relationship for large strain and the shear modulus reduction curve for seismic behavior are presented here.","PeriodicalId":509438,"journal":{"name":"Proceedings of the Institution of Civil Engineers - Geotechnical Engineering","volume":"47 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140373450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advancing landslide early warning systems through saturation monitoring and predictive analysis 通过饱和监测和预测分析推进滑坡预警系统

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2024-02-12 DOI: 10.1680/jgeen.23.00037

Prashant Sudani, K.A. Patil

{"title":"Advancing landslide early warning systems through saturation monitoring and predictive analysis","authors":"Prashant Sudani, K.A. Patil","doi":"10.1680/jgeen.23.00037","DOIUrl":"https://doi.org/10.1680/jgeen.23.00037","url":null,"abstract":"The landslide occurrence is most common in the rainy season, costing deep damage to the infrastructure and human lives. An early prediction framework for such a disaster can help to mitigate damages. For this reason, in this work, a prediction framework for shallow landslide initiation is developed and validated with a real case study. In order to test the reliability of the prediction framework, a back analysis of a recent landslide accrued in the study area, Malin village of Maharashtra, on July 2014 was performed. Relations of landslide stability with the water saturation were established through a physically based approach using the Geo-Studio analysis module. A leaky barrel algorithm was developed for the study locations to monitor rainfall's effect on water saturation. Simulation results of landslide stability were compared with the leaky barrel-based rainfall-water saturation algorithm. The result confirms the good predictability of landslide occurrence through a presented framework. The procedure presented in this paper for predicting shallow landslide occurrence is recommended for real-time monitoring of landslide-prone locations.","PeriodicalId":509438,"journal":{"name":"Proceedings of the Institution of Civil Engineers - Geotechnical Engineering","volume":"32 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139782529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Obituary: Professor Bengt B. Broms President of ISSMFE (1984-1989) 讣告：Bengt B. Broms 教授国际社会科学和人文科学联合会主席（1984-1989 年）

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2024-02-05 DOI: 10.1680/jgeen.24.00230

K. Massarsch, B. Fellenius, Robert D. Holtz

引用次数: 0

Geotechnical Engineering: Referees 2023 岩土工程：裁判员 2023

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2024-02-01 DOI: 10.1680/jgeen.2024.177.1.106

引用次数: 0

Stress effects due to different installation methods for pipe piles in sand 沙中管桩不同安装方法的应力效应

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2024-01-05 DOI: 10.1680/jgeen.23.00105

Philipp Stein

{"title":"Stress effects due to different installation methods for pipe piles in sand","authors":"Philipp Stein","doi":"10.1680/jgeen.23.00105","DOIUrl":"https://doi.org/10.1680/jgeen.23.00105","url":null,"abstract":"Impact driven pipe piles are commonly used in offshore structures but vibratory driving is becoming more popular due to advantages regarding noise emissions, material fatigue and installation time. In offshore practice, crane-guided vibratory driving is used for maximum control over the installation process. Regarding the load-bearing behaviour of piles, the influence of the installation method is currently subject to research. To contribute to this question, comparative scale model investigations were carried out with impact driven, jacked, and vibratory driven piles in dense sand. The tests focussed on variations of vibratory installation parameters, including ‘crane-guided’ and ‘free’ vibratory driving. Based on measurements at the pile and in the soil, the influence of dynamic pile motions on the soil stress development could be analysed. The well-known increase of radial effective soil stresses due to impact driving could be reproduced. The tests showed that the same effects could be evoked by ‘free’ vibratory driving if certain vibration parameters were met. Increased soil stresses may be beneficial for the lateral or axial pile behaviour, but on the other hand cause problems regarding drivability. A sequential application of ‘crane-guided’ and ‘free’ vibratory driving may optimise both the installation process and the bearing behaviour.","PeriodicalId":509438,"journal":{"name":"Proceedings of the Institution of Civil Engineers - Geotechnical Engineering","volume":"42 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139382489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deformation characteristics of excavation supported by prefabricated recyclable structures 用预制可回收结构支撑挖掘的变形特征

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2024-01-05 DOI: 10.1680/jgeen.22.00232

Fuming Wang, Lichao Chen, Yanhui Pan, Chengchao Guo, Chao Guo, Lisha Yue, Xuanxuan Chu

{"title":"Deformation characteristics of excavation supported by prefabricated recyclable structures","authors":"Fuming Wang, Lichao Chen, Yanhui Pan, Chengchao Guo, Chao Guo, Lisha Yue, Xuanxuan Chu","doi":"10.1680/jgeen.22.00232","DOIUrl":"https://doi.org/10.1680/jgeen.22.00232","url":null,"abstract":"With the development of urban underground space, green and efficient excavation supporting structures are receiving increasing attention. Thus, prefabricated recyclable supporting structures (PRSSs) have been developed. A deep circular excavation supported by PRSSs in low plasticity clay (CL) was extensively instrumented to explore its deformation characteristics. The measurement results show that the lateral displacement of supporting piles (δhp) presented a typical cumulative pattern dominated by deep inward movement. The maximum lateral displacements of supporting piles (δhpm) varied between 0.28%H∼0.52%H (H is the excavation depth). The maximum lateral pile displacements mostly occurred above the excavation surface, ranging from H+0.5 to H−7.0. The soils 3 and 10 m from the excavation had the largest lateral displacement at the top and a cantilever shape. The ground surface settlements tended to follow a convex pattern. The maximum ground surface settlements (δvm) were normalized using final excavation depth (He) on the east and south sides, i.e., 0.43% and 0.50%, respectively. The ratio of δvm to δhpm tends to increase as the excavation and dewatering proceeds and varies between 0.49 to 1.15. The ground surface settlement due to dewatering was 19% of the maximum settlement.","PeriodicalId":509438,"journal":{"name":"Proceedings of the Institution of Civil Engineers - Geotechnical Engineering","volume":"56 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139381746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Southbank Place development: tunnel movement predictions and monitoring performance 南岸广场开发项目：隧道运动预测和监测性能

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2024-01-03 DOI: 10.1680/jgeen.23.00173

Stuart Hardy, Anton Pillai, Xiangbo Qui, Duncan Nicholson

{"title":"The Southbank Place development: tunnel movement predictions and monitoring performance","authors":"Stuart Hardy, Anton Pillai, Xiangbo Qui, Duncan Nicholson","doi":"10.1680/jgeen.23.00173","DOIUrl":"https://doi.org/10.1680/jgeen.23.00173","url":null,"abstract":"The Southbank Place project comprised the redevelopment of the UK headquarters of the Shell company (formerly known as the Shell Centre) in the Waterloo area of London. The project included demolition of all structures within the site except for the iconic tower building, the local extension of the existing basement and the construction of eight new mixed-use buildings. London Underground's (LU) Bakerloo and Northern Line running tunnels pass beneath the site. The excavation of the basement and construction of the Shell Centre in the late 1950s caused movements of the underlying Bakerloo Line tunnels that were much larger than expected. The monitoring of these tunnels between 1958 and 1995 has provided a classic case history for the behaviour of London Clay. The proposed redevelopment offered an opportunity to analyse and monitor the behaviour of London Underground tunnels over a period of 60 years and two phases of significant construction. The paper presents the back analysis of the historical monitoring of the Bakerloo Line tunnels and the calibration of a sophisticated finite element model. The model was subsequently used to predict the impact of the redevelopment on the tunnels as part of the assurance procedure with LU.","PeriodicalId":509438,"journal":{"name":"Proceedings of the Institution of Civil Engineers - Geotechnical Engineering","volume":"93 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139388229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Editorial: Geo-environmental loads acting on tunnels 社论：作用于隧道的地质环境荷载

Proceedings of the Institution of Civil Engineers - Geotechnical Engineering Pub Date : 2023-12-01 DOI: 10.1680/jgeen.2023.176.6.523

Riccardo Pietro Castellanza

引用次数: 0