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.
作者
刘志达
刘文辉
Liu Zhida;Liu Wenhui(College of Civil & Traffic, South China University of Technology, Guangzhou 510640, China;Guangzhou Municipal Enigneering Design & Research Institute, Guangzhou 510060, China)
出处
《山西建筑》
2019年第3期63-64,共2页
Shanxi Architecture
关键词
花岗岩残积土
压力膜仪
土水特征曲线
干密度
granite residual soil
pressure membrane meter
soil-water characteristic curves
dry density
