渭南地区软弱土质道路边坡抗滑桩加固的稳定性分析

针对陕西渭南某地区高速公路修建过程中遇到的边坡软弱地质问题,利用ABAQUS软件模拟了多层土质情况下三维抗滑桩加固土坡的有限元模型,用强度折减法分析得出以下结论:在距离桩顶以下4倍桩径的范围内桩前土体和桩体产生了脱开变形,桩前土压力在距离桩顶4.5 m范围内接触压力几乎为0;在较深土层(约桩身4/5处),桩前土压力要大于桩后土压力;土体采用抗滑桩加固前的安全稳定系数为1.21,加固后的安全稳定系数提高到1.43,加固后由于抗滑桩的作用使坡体的稳定性增加约18%,加固效果比较明显。

Stability Analysis of Anti-slide Pile Reinforcement of Soft Soil Road Slope in Weinan Region

Aiming at the weak geologic problems encountered in the construction of expressway in a certain area of Weinan, Shaanxi Province, the finite element model of three-dimensional anti-slide pile reinforced slope in the case of multi-layer soil is simulated by ABAQUS software. With the strength reduction analysis, the following conclusions are drawn: in the range of 4 times the pile diameter below the pile top, there is a disengaging deformation between the soil body in front of the pile and the pile. Within the distance from the pile top the contact pressure of the soil pressure in front of the pile is almost zero. In the deeper soil layer, the soil pressure in front of the pile is larger than that behind the pile. The safety and stability factor of the soil body without anti slide pile reinforcement is 1. 21, and the safety and stability factor after reinforcement is increased to 1. 43. Due to the effect of anti slide pile, the stability of the slope is increased by about 18%, and the reinforcement effect is obvious.