摘要
通过4组特高心墙坝岸坡接触黏土层离心模型试验,分析了岸坡不同位置处接触黏土与心墙在坝体填筑加载过程中的变形,以及变形在竣工后的发展情况。试验结果表明:接触黏土层与岸坡、心墙土体之间的相对变形较小,没有分离现象,变形协调性较好;上覆荷载引起接触黏土产生垂直岸坡的压缩变形和平行岸坡的剪切变形,压缩和剪切变形均随荷载对数线性增加,接触黏土始终处于压剪状态;变形随荷载的发展程度,在坝基坡度较缓时较小,坝基坡度较陡时较大,在坝基坡度变化处则介于两者之间;接触黏土层的变形在竣工后渐趋稳定。
In order to study the deformation behavior of contact clay of an ultra-high core dam,4 groups of centrifugal model tests are carried out.The results show that the differential deformations among the contact clay,bank and core wall are acceptable,and no separation are observed at contact parts.The deformations of the contact clay caused by vertical loads include the compression deformations vertical to the bank and the shear ones parallel to the bank.The contact clay is in the compression-shear state.The compression and shear deformations both increase with the loads in a log-linear trend.This trend is greater at steeper bank slope.The deformation development of the contact clay gradually becomes stable after construction.
作者
程瑞林
慕洪友
顾行文
任国峰
王年香
CHENG Rui-ling;MU Hong-you;GU Xing-wen;REN Guo-feng;WANG Nian-xiang(PowerChina Guiyang Engineering Corporation Limited,Guiyang 550081,China;School of Water Resources and hydropower,Wuhan University,Wuhan 430072,China;Geotechnical Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210024,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2022年第S02期40-44,共5页
Chinese Journal of Geotechnical Engineering
基金
贵州省高层次创新型人才项目([2018]5630)
贵州省科技支撑计划项目([2019]2869)
中央级公益性科研院所基本科研业务费专项资金项目(Y321001,Y321002)
关键词
特高心墙坝
接触黏土
变形特性
离心模型试验
变形协调
ultra-high core dam
contact clay
deformation behavior
centrifugal model test
deformation compatibility
