塔克拉玛干沙漠腹地风沙土的物理力学性质

Mechanical properties of the wind-deposit-sand in Takla Makan desert

风沙是形成于干旱、半干旱区的一种特殊性质的土 ,其力学性质不同于一般土体 ,结构松散性为其最主要的特点。本文通过对塔克拉玛干沙漠腹地风沙土样进行的试验 ,获得了风沙土基本力学参数 :压缩模量为 5 0 0～ 14 2 86MPa ,是一种低压缩性土 ;为 31°5 5′～ 36°19′ ;风沙土存在结构力 ,其力学效应相当于粘聚力 ,数值在 0 6～ 9 3MPa之间。

Wind\|deposit sand is a special soil formed in dry\|semiarid climate area.Unlike the mechanical property of the general soil mass,looseness of texture is its major feature.By compressive and shear tests of the wind\|deposit\|sand in Takla Makan desert,some basic mechanical parameters of the soil are obtained:compressive modulus is 50.0～142 86MPa,a low compressive soil,  =31°55′～36°19′.There is structural force for the wind\|deposit sand soil with a mechanical effect equivalent to cohesion,and its value is in 0.6～9.3MPa.