干密度对重塑花岗岩残积土土水特征曲线影响

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英文篇名：Effect of dry density on soil water characteristic curve of remolded granite residual soil 作者：刘志达 ; 刘文辉 英文作者：Liu Zhida;Liu Wenhui;College of Civil & Traffic,South China University of Technology;Guangzhou Municipal Enigneering Design & Research Institute; 关键词：花岗岩残积土 ; 压力膜仪 ; 土水特征曲线 ; 干密度 英文关键词：granite residual soil;;pressure membrane meter;;soil-water characteristic curves;;dry density 中文刊名：JZSX 英文刊名：Shanxi Architecture 机构：华南理工大学土木与交通学院;广州市市政工程设计研究院; 出版日期：2019-01-20 出版单位：山西建筑 年：2019 期：v.45 语种：中文; 页：JZSX201903031 页数：2 CN：03 ISSN：14-1279/TU 分类号：70-71

摘要

采用压力膜仪法对深圳市福田区某基坑底部的花岗岩残积土重塑土样进行不同干密度下的土水特征曲线试验,研究不同干密度对花岗岩残积土土水特征曲线的影响,并采用Van Genuchten模型、Fredlund&Xing模型及Gardenr模型进行土水特征曲线拟合,以给工程设计提供参考。试验结果表明:不同干密度对土水特征曲线有显著影响,且主要影响土水特征曲线的过渡段,干密度越大其持水性能越强、进气值越大; 3种模型均可较好模拟花岗岩残积土重塑样土水特征曲线。
        The soil-water characteristic curves of granite residual soils at the bottom of a foundation pit in Futian District,Shenzhen,were tested by pressure membrane method. The effects of different dry densities on the soil-water characteristic curves of granite residual soil were studied,the soil water characteristic curve fitting was carried out using Van Genuchten model,Fredlund & Xing model and Gardenr model. The test results show that different dry density has a significant influence on the soil water characteristic curve,and mainly affects the transition section.The larger the dry density,the stronger the water holding performance and the larger the intake value. All three models can better simulate the soil-water characteristic curves of remolded granite residual soil.

引文

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