doi:10.16186/j.cnki.1673-9787.2019110054

Received:2019/11/12

Revised:2019/12/25

Published:2021/03/15

Semi-empirical study on one-dimensional wetting deformation respect to time forexpansive soil

WANG Jinshu, WU Guang

School of Geosciences and Environmental Engineering .Southwest Jiaotong University， Chengdu 611756 ， Sichuan， China

Abstract:The estimation method of the wetting deformation of infiltration respect to time for expansive soil was investigated. A series of standard cutting ring-knife specimens were designed with certain initial moisture content and dry density. Through one-dimensional water absorption and expansion tests， the empirical function between the maximum expansion rate of soil mass and the initial moisture content and dry density was obtained， and so was the saturated water content. Based on soil-water characteristic curve （ SWCC ） ， the change of volumetric moisture content in soil infiltration process with time was simulatedby using the finite element analysis （FEM ） . Combined the theoretical formula with the numerical simulation results of the change of volume moisture content respect to time， the change of soil heave respect to time was obtained. Compared with the measured and numerical data， the estimated results from empirical formula with FEM agreed well. The proposed method was promising and could be used in practice for estimation of the 1 -D heave with respect to time.

Key words:expansive soil;soil-water characteristic curle;deformation respect to time;semi-empirical method

 膨胀土一维湿化变形时效特性的半经验法研究_王金淑.pdf