反h抗滑桩对陡坡路基沉降影响的数值模型分析

以阿拉山口市温泉县G30公路建设项目为依托,通过数值模拟方法,建立陡坡路基典型数值模型,研究在季节性冻土的条件下反h桩对陡坡路基抗滑影响因素,并重点分析了桩间距、冻融循环次数及截面边长对陡坡路基沉降量的影响。结果表明:反h桩排间距对沉降量的影响较大,当反h桩排间距位于6~7 m时,陡坡路基沉降量变化相对稳定;冻融循环次数对沉降量的影响是先增大、后减小的过程;截面边长不是越大越好,在一定范围内,通过增大截面边长可以显著减小沉降量,但继续增加该参数减沉效果不明显。

Numerical Model Analysis of Influence of Anti-h Anti-slide Pile on Settlement of Steep Slope Subgrade

Based on the construction project of Alashankou City Wenquan County G30 Highway,the typical numerical model of steep slope subgrade is established by means of numerical simulation.Under the condition of seasonal frozen soil,the influence factors of anti-h pile on the slide resistance of steep slope subgrade are studied,and the influence of pile spacing,freeze-thaw cycle times and section side length on settlement of steep slope subgrade is emphatically analyzed.The results show that the anti-h pile spacing has a great influence on the settlement.When the anti-h pile spacing is between 6 m and 7 m,the settlement of the steep slope subgrade is relatively stable.The influence of freezing-thaw cycle times on the settlement is first increased and then decreased.The section side length is not large the better.In a certain range,the settlement can be significantly reduced by increasing the side length of the section.But the settlement effect is not obvious if increasing this parameter continuously.