高填方抗滑桩加固效果监测分析

Application of large diameter variable section anti-slide pile in high fill reinforcement

摘要:

某倾斜地基上进行中心填高为26.5m的高路堤工程,为保护坡脚民房采用抗滑桩进行高填方加固,高填方施工完成后降雨期间对抗滑桩进行位移监测,并与计算结果作对比。本文运用MIDAS GTS软件对加固边坡的安全系数、桩体位移内力、坡体位移进行分析,并结合现场桩体位移监测结果进行反分析,表明抗滑桩能够显著提高安全系数,限制坡体沿倾斜地基的位移；边坡安全系数较高的情况下,抗滑桩桩顶、坡脚部位仍会产生较大的位移。降雨工况下填筑材料力学参数宜进行0.8倍的折减。本文的研究为高填方的加固设计及数值研究提供了参考依据。

Abstract:

A high embankment project with a central filling height of 26.5m was carried out on a sloping foundation. In order to protect the civil buildings at the foot of the slope, n embedded anti-slide piles were used to reinforce the high fill. The maximum displacement of the anti-slide piles was 15cm after the completion of the high fill construction. In this paper, MIDAS GTS software is used to analyze the safety factor, pile displacement, internal force and slope displacement of the reinforced slope, and the back analysis is carried out in combination with the on-site pile displacement monitoring results. It shows that the anti-slide pile can significantly improve the safety factor and limit the displacement of the slope along the inclined foundation; despite the slope safety factor is high, the top and toe of the anti-slide pile will still have large displacement .Under rainfall conditions, the mechanical parameters of filling materials should be reduced by 0.8 times. This paper provides a reference for the reinforcement design and numerical research of high fill.