基于有限元研究抗滑桩不同桩间距加固膨胀土边坡的稳定性

以吉林—珲春客运专线典型膨胀土边坡工程为依托,采用有限元强度折减法计算分析ABAQUS线弹塑性模型,对不同桩间距抗滑桩加固膨胀土边坡的稳定性进行分析,并与现场监测数据进行对比。研究结果表明:随桩间距的增大,膨胀土边坡安全系数逐步降低,且降低速率先平缓后加快;计算出最合理的抗滑桩间距为5.25 m,验证了抗滑桩施工间距布置的合理性;通过与现场监测数据的对比,验证了数值模拟结果的正确性。

Research on Different Pile Spacings of Slide-resistant Pile for Enhancing Stability of Expansive Soil Slope Based on Finite Element

Relying on typical expansive soil slope engineering of Jilin-Hunchun Passenger Dedicated Line, the finite element strength reduction method is used to calculate and analyze the line elastic-plastic model in ABAQUS. The different pile spacings of slide-resistant pile for enhancing expansive soil slope is analyzed and compared with the monitoring data on site. The research results show: With the increase of pile spacing, the safety factor of expansive soil slope is progressively reducing, and the lowering rate is gently first and then rapidly. The most reasonable spacing of slide-resistant piles shall be 5.25 m. The reasonability of arrangement spacing of slide-resistant piles is verified. Through comparison with the monitoring data on site, the correctness of simulated value is verified.