不同地下水位、不同抗滑桩方案对软土路基边坡稳定的影响分析

Study on Impact of Different Groundwater Levels and Different Anti-slide Schemes on Stability of Slope in Soft Soil Subgrade

摘要:

为研究高地下水位条件下软土路基稳定性及加固措施，以某高地下水位软土路基为研究对象，基于FLAC3D有限元软件，研究不同初始水位、不同水位差、水位下降等条件下路基边坡稳定性，并分析了不同抗滑桩桩长、距坡脚距离、桩间距等对边坡的加固效果。研究结果表明：（1）边坡安全系数随水位的增大呈V形，随着左侧水位抬升，右侧边坡安全系数在逐渐减小，随着右侧水位的抬升，右侧边坡安全系数先减小后增大；（2）水位下降过程中，边坡安全系数先减小，随之经历一个∧形波动，最后边坡安全系数逐渐增大；（3）随抗滑桩桩长的增大、距坡脚距离的减小、抗滑桩间距的减小，边坡安全系数在逐渐增大。

Abstract:

In order to study the stability and reinforcement measures of soft soil subgrade under the condition of high groundwater level, taking a high groundwater level soft soil subgrade as the research object, based on FLAC 3D finite element software, the stability of subgrade slope under different initial water level, different water level difference and water level drop is studied, and the reinforcement effect of different anti-slide pile length, distance from slope foot and pile spacing on the slope is analyzed. The results show that: (1) The safety factor of slope is V shape with the increase of water level, with the rise of the water level on the left side, the safety factor of the slope on the right side is gradually decreasing, and with the rise of the water level on the right side, the safety factor of the slope on the right decreases first and then increases.(2) In the process of water level falling, the safety factor of the slope decreases first, then experiences a ∧-shaped fluctuation, and finally the safety factor of the slope is gradually increasing.(3) With the increase of the anti-slide pile length, the decrease of the distance from the slope foot and the decrease of the anti-slide pile spacing, the slope safety factor is gradually increasing.