【摘要】 以荆襄高速公路膨胀土地区路堑边坡稳定性为研究对象,首先确定了边坡稳定所需膨胀土、5%石灰改性土和50%粉煤灰改性土的强度参数。随后设计了相同坡形,不同坡率、坡高、台宽等24种计算工况。研究发现:坡率和台阶宽度带来的稳定影响均呈现线性增加。坡率和台宽安全系数谱数据稳定,可供设计参考。更多还原

【Abstract】 Cut slope stability of expansive soil area in Jingxiang highway is studied. Firstly, the physical and mechanics parameters of soil such as raw expansive soil, 5% lime modified soil and 50% fly-ash modified soil used in computing are determined. Then, the 24 kinds of computing schemes are designed as following: six kinds of slope ratio vibrating 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、 4 m, two grade slope with height of 4m for each grade. Found that the slope ratio and platform width cause the factor linear enhancing. The safety factor spectrum is stable, which can be interpolated to determine geometry parameters of the cut slope.更多还原