岩土力学2024，Vol.45Issue(3)：769-776,8.DOI:10.16285/j.rsm.2023.1192
反滤压重及埋深对深厚覆盖层允许坡降影响研究
Influence of weights and buried depth on the allowable hydraulic gradient of deep overburden foundation
摘要
Abstract
Both weights and buried depth can influence the allowable hydraulic gradient of soil,but these effects have not been quantified.Quantification of these influences is the key to determine the allowable hydraulic gradient and to evaluate seepage safety.In this study,the axial stress was adopted to simulate the effects of weights and buried depth.A list of seepage tests under different axial stresses was performed on soil ③-1 of Luding Hydropower Station,and the influences of weights and buried depth on the critical hydraulic gradient were quantified.The results indicate that the critical hydraulic gradients of the upper and middle envelopes of particle size distribution linearly increase with the increase in axial stress,while that of the lower envelope is not influenced by the axial stress.The influences of weights and buried depth on the allowable hydraulic gradient were quantified based on the experimental results,and a formula describing the variation of the allowable hydraulic gradient with axial stress was proposed,and then a method determining the allowable hydraulic gradient which can consider the influences of weights and buried depth was established,and it can provide a reference for the similar project.关键词
深厚覆盖层/允许坡降/反滤压重/埋深/应力状态Key words
deep overburden foundation/allowable hydraulic gradient/weights/buried depth/stress state分类
建筑与水利引用本文复制引用
张会豪,邱子源,金伟,张丹,罗玉龙..反滤压重及埋深对深厚覆盖层允许坡降影响研究[J].岩土力学,2024,45(3):769-776,8.基金项目
国家重点研发计划(No.2017YFC1502603) （No.2017YFC1502603）
国家自然科学基金资助项目(No.51679070) （No.51679070）
中国科学院青海盐湖研究所基础研究青年创新交叉团队(No.islJCTD-2022-2) （No.islJCTD-2022-2）
湖南省水利科技项目(No.XSKJ2021000-35,No.XSKJ2022068-37).This work was supported by the National Key R&D Program of China(2017YFC1502603),the National Natural Science Foundation of China(51679070),the Basic Research Youth Innovation Intersection Team of Qinghai Institute of Salt Lakes,Chinese Academy of Sciences(islJCTD-2022-2)and Hunan Water Conservancy Science and Technology(XSKJ2021000-35,XSKJ2022068-37). （No.XSKJ2021000-35,No.XSKJ2022068-37）
