荆襄地区膨胀土边坡稳定性研究  

Research on the Stability of Expansive Soil Cut Slope in Jingxiang District

作　　者：李建军[1,2] 

机构地区：[1]太原理工大学建筑与土木工程学院,太原030024 [2]中北大学土木工程系,太原030051

出　　处：《中国农村水利水电》2009年第3期112-114,共3页China Rural Water and Hydropower

基　　金：山西省自然基金项目资助(2008011055)

摘　　要：以荆襄地区水利水电工程膨胀土边坡稳定性为研究对象,首先对其天然状态物理力学性质进行了研究,确定了边坡稳定所需强度参数。随后设计了1∶0.75到1∶1.50等0.25间距坡率,高度4 m、6 m8、m、10 m、12 m计算工况;放2级坡,1 m平台,每级坡高度4 m和6 m,1∶0.75到1∶2.00坡率6个计算方案;放2级坡,每级坡高度4 m和6m,台阶宽1 m2、m3、m4、m等4类计算工况。研究发现:高度引起安全系数由大到小非线性衰减,坡率和台阶宽度带来的稳定影响均呈现线性增加。坡率和阶宽安全系数谱数据稳定,设计可根据公路等级和既定参数插值确定坡型尺寸。Cut slope stability of expansive soil about water resources and hydropower engineering in Jingxiang district is studied. First, the physical and mechanical parameters of soils used to compute are determined. Then, the schemes are designed as follows; five kinds of slope height, 4 m,6 m,8 m,10 m,12 m, with slope ratio vibrating from 1 ： 0. 75 to 1 ： 1.50 at intervals of 0. 25, six schemes of two grade slope with height of 4 m and 6 m for each grade and 1 m platform whose slope ratio change from 1 ： 0. 75 to 1 ： 2.00 at intervals of 0.25, four types of platform width such as 1 m, 2 m, 3 m, and 4 m. Slope height results in safety factor nonlin- ear changes from 2.0 to 0. 8, that the slope ratio and platform width cause the factors to enhance in a linear way. The safety factor spectrum is stable, which can be interpolated to determine geometrical parameters of the cut slope.

关 键 词：膨胀土 边坡 稳定性 安全系数谱 

分 类 号：O319.56[理学—一般力学与力学基础]