Proceedings of the Institution of Civil Engineers-Geotechnical Engineering最新文献_第3页

Analysis of prefabricated vertical drains with surcharge preloading of Hiep Phuoc clay 合富粘土堆载预压装配式垂直排水管分析

4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-08-01 DOI: 10.1680/jgeen.21.00079

Cong-Oanh Nguyen, Thi Van-Tram Dao, Thi-Thanh Tran

引用次数: 1

An anchoring system for supporting platforms for wind energy devices 一种用于风能装置支撑平台的锚固系统

IF 2.2 4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-07-25 DOI: 10.1680/jgeen.22.00245

V. Sivakumar, J. Fanning, K. Gavin, S. Tripathy, A. Bradshaw, E. Murray, J. Black, S. Donohue

引用次数: 0

Dry stacking of iron ore tailings: Possible particle breakage during compaction 铁矿尾矿干堆:压实过程中可能出现的颗粒破碎

IF 2.2 4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-07-13 DOI: 10.1680/jgeen.22.00216

Alexia Cindy Wagner, João Vítor de Azambuja Carvalho, João Paulo de Sousa Silva, H. C. Scheuermann Filho, N. Consoli

{"title":"Dry stacking of iron ore tailings: Possible particle breakage during compaction","authors":"Alexia Cindy Wagner, João Vítor de Azambuja Carvalho, João Paulo de Sousa Silva, H. C. Scheuermann Filho, N. Consoli","doi":"10.1680/jgeen.22.00216","DOIUrl":"https://doi.org/10.1680/jgeen.22.00216","url":null,"abstract":"The disposal of iron ore tailings in dry stacks has become increasingly common in Brazil. In these structures, the iron ore tailings are compacted in layers using drum rollers that cause compaction and vibration efforts on the ground. Particle breakage is usually observed in granular materials when subjected to static loads of great magnitude, as can occur depending on the stacking height achieved. However, particle breakage also may occur during the layers’ compaction. This study investigates the breakage behaviour of iron ore tailings simulating load conditions that may occur during dry stacks construction. Two usual iron ore tailings with different amounts of clay size particles, but similar mineralogy (about 77% quartz and 19% iron oxide – the usual composition of iron ore tailings in Brazil) were subject to cyclic oedometer tests. Particle size distribution analyses were performed before and after testing all specimens. Both iron ore tailings, representing typical physical and mineralogical characteristics of the Quadrilátero Ferrífero (southeast Brazil), only suffered particle breakage (Relative Breakage between 0.12 and 0.14 for tailings A and between 0.14 and 0.16 for tailings B) under extremely high pressures (σ’v = 85 MPa) applied by oedometer testing, above those usually found in the field. For usual pressures applied in the field, the frequency of load and number of cycles were of no significance in particle breakage.","PeriodicalId":54572,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83898054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Back-analysis of an embedded retaining wall in stiff clay 刚性粘土中嵌入式挡土墙的反分析

IF 2.2 4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-07-10 DOI: 10.1680/jgeen.22.00072

Chuan Fong Foo, T. Le, Paul Bailie, J. Standing

{"title":"Back-analysis of an embedded retaining wall in stiff clay","authors":"Chuan Fong Foo, T. Le, Paul Bailie, J. Standing","doi":"10.1680/jgeen.22.00072","DOIUrl":"https://doi.org/10.1680/jgeen.22.00072","url":null,"abstract":"The performance of embedded retaining walls during and after excavation is commonly predicted using numerical techniques and assessed by field monitoring. However, subsequent back-analyses of post-construction monitoring data are rarely undertaken. The purpose of this paper is two-fold: (i) to provide a comprehensive post-construction review of site information and monitoring data from a construction site in central London and (ii) to detail results from a parametric study undertaken as part of the back-analyses of five key embedded retaining wall sections. The importance of accounting for the effects of non-linear soil stiffness when predicting wall deflection profiles is highlighted by the parametric study. Good agreement between the numerical model and field monitoring data was achieved through the back-analysis exercise. Differences in the predicted Class C wall deflection profiles are attributed to varying temporary support systems and complex 3D site geometry. Best practice recommendations relating to field monitoring and a new streamlined methodology for performing similar back-analyses are proposed.","PeriodicalId":54572,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81624895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Calculation method of bearing capacity of screw pile under compression load based on limit equilibrium theory 基于极限平衡理论的螺旋桩抗压承载力计算方法

IF 2.2 4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-06-28 DOI: 10.1680/jgeen.22.00122

Jiakuan Ma, Rui Wang, Zhiping Hu, Tong Mu, Anlong Liu, Victor Tolulope Olusegun

引用次数: 0

Modelling tunnel squeezing using gene expression programming: a case study 利用基因表达编程模拟隧道挤压:一个案例研究

IF 2.2 4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-06-26 DOI: 10.1680/jgeen.22.00151

M. Kadkhodaei, E. Ghasemi, Saeed Mahdavi

引用次数: 1

The numerical investigation of the main factors influencing rocking responses of shallow foundations 影响浅基础摇摆响应主要因素的数值研究

IF 2.2 4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-06-19 DOI: 10.1680/jgeen.22.00175

Seyed Omid Khamesi, S. M. Mir Mohammad Hosseini

{"title":"The numerical investigation of the main factors influencing rocking responses of shallow foundations","authors":"Seyed Omid Khamesi, S. M. Mir Mohammad Hosseini","doi":"10.1680/jgeen.22.00175","DOIUrl":"https://doi.org/10.1680/jgeen.22.00175","url":null,"abstract":"Several investigations show that structures with rocking foundations bring more stability and fewer post-earthquake damages to superstructures by dissipating seismic energy within the underlying soils. Nevertheless, there are still obstacles to making this design philosophy a practical solution, including concerns about the residual settlements and rotations. In order to provide a better insight into the problem, the present paper investigates the performance of a simple structure with a rocking foundation, taking advantage of pushover and time history analyses. The finite element method is applied for the study, and the numerical model has been validated using results from recent experimental research. Accordingly, the effect of a number of influential parameters involving the properties of soil, structure, and ground motions is evaluated. Current research considers different static safety factors against soil shear strength failure, structure slenderness ratios, earthquake records, and foundation embedment depths, and the response of the systems with rocking foundations has been elaborated using the obtained results. The contribution of the investigated parameters is pronounced in the main features of the rocking foundation performance, such as the system moment capacity and foundation deformations (settlement and rotation).","PeriodicalId":54572,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84587819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Estimation of internal friction angle for working platform materials by plate load test 用板载试验估算工作平台材料的内摩擦角

IF 2.2 4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-06-07 DOI: 10.1680/jgeen.22.00248

Burden Chitambira, Alastair Dewar

{"title":"Estimation of internal friction angle for working platform materials by plate load test","authors":"Burden Chitambira, Alastair Dewar","doi":"10.1680/jgeen.22.00248","DOIUrl":"https://doi.org/10.1680/jgeen.22.00248","url":null,"abstract":"This paper reviews the load-settlement behaviour of 499 plate load tests of various diameters undertaken on granular soils and working platform materials to determine the angle of internal friction mobilised by the test. The observed settlement of individual plate load tests at relatively small settlement has been extrapolated to a theoretical failure of the plate at 10% and 15% of the plate's diameter (D). For each test an effective angle of internal shearing resistance was calculated based on the bearing resistance associated with the stress required to cause settlement of 0.10 or 0.15 times the plate diameter. The results are presented along with a discussion on the use of high friction materials in working platforms and shallow foundations. Characteristic values for the effective angle of internal shearing resistance are provided for all working platform materials tested as well as tests undertaken on platform materials comprising crushed brick and concrete. These values are compared to shear box test results on similar materials. Characteristic values of ϕ’ varying from 44° to 46.4° (0.1D) and 45.3° to 47.8° (0.15D) for crushed brick and concrete materials are calculated, which is slightly higher than that determined from tests on Type 1 material.","PeriodicalId":54572,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74209542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Discussion of cutterhead opening design for earth pressure balance machines (EPBMs) in soft grounds 软土地基土压力平衡机刀盘开口设计探讨

IF 2.2 4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-06-06 DOI: 10.1680/jgeen.22.00254

Dariush Mohammadi, K. Shahriar, P. Moarefvand, E. Farrokh

{"title":"Discussion of cutterhead opening design for earth pressure balance machines (EPBMs) in soft grounds","authors":"Dariush Mohammadi, K. Shahriar, P. Moarefvand, E. Farrokh","doi":"10.1680/jgeen.22.00254","DOIUrl":"https://doi.org/10.1680/jgeen.22.00254","url":null,"abstract":"Among the various parts of the earth pressure balance (EPB) cutterheads, the opening distribution on the cutterhead face plays a crucial role in successful of the tunneling projects in soft grounds. However, the amount of published literature on this subject is very limited, as a result, tunnel boring machine (TBM) manufacturers have been developed different soft ground cutterheads with varied opening distributions through their experience. In this paper, at the first step, the field studies results for soft ground cutterheads opening design were expressed. Next, the paper mainly focused on the numerical studies using discrete element method (DEM) to evaluate the adaptability of the EPB system and cohesive and non-cohesive soils fluidity by changing the opening distribution on the cutterhead. Finally, the optimum opening ratio and its distribution for different soils by considering the value of the thrust force, cutterhead torque and soil fluidity condition as important parameters were proposed based on the analysis results from DEM accordingly. Furthermore, the flow characteristics of soil particles inside the EPB chamber was obtained through examination of velocity field, also the practical aspects with further application in TBM industry by considering field studies and a real example were discussed.","PeriodicalId":54572,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77999968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Laboratory tests on the frictional capacity of core pile – cemented soil interface 心桩-水泥土界面摩擦承载力的室内试验研究

IF 2.2 4区工程技术

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2023-05-15 DOI: 10.1680/jgeen.22.00205

Jia-jin Zhou, Jianyuan Ren, Junqing Ma, Jian-lin Yu, Ri-hong Zhang, X. Gong

{"title":"Laboratory tests on the frictional capacity of core pile – cemented soil interface","authors":"Jia-jin Zhou, Jianyuan Ren, Junqing Ma, Jian-lin Yu, Ri-hong Zhang, X. Gong","doi":"10.1680/jgeen.22.00205","DOIUrl":"https://doi.org/10.1680/jgeen.22.00205","url":null,"abstract":"The pre-bored grouted planted (PGP) pile is a new type of composite pile, and the core PHC pile is surrounded by cemented soil layer. The frictional capacity of core PHC pile – cemented soil interface has a significant effect on the bearing capacity of PGP pile. A series of square pile (pipe pile) – soil interface shear tests were carried out in this study to study the frictional capacity of smooth square pile (pipe pile) – cemented soil interface. The shear test results show that the peak skin friction of square pile (pipe pile) – cemented soil interface both increased with the cemented soil strength; the peak skin friction of square pile – cemented soil interface was smaller than the peak skin friction of pipe pile – cemented soil interface of identical pile (equivalent) diameter, owing to the occurrence of stress concentration at the corners of square pile; the peak skin friction of square pile (pipe pile) – cemented soil interface both decreased with the pile (equivalent) diameter; the occurrence of cracks in the cemented soil caused the brittle failure of both square pile (pipe pile) – cemented soil interface.","PeriodicalId":54572,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79883931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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