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为揭示抗滑桩与滑坡体相互作用机理和抗滑桩土拱效应的发展变化特征,利用FLAC3D软件对抗滑桩与滑坡体相互作用过程开展了数值模拟计算,并对比分析了不同滑坡体发生位移时桩周土体位移和桩间土体应力的变化规律。研究结果表明:滑体在滑移过程中,土拱效应逐渐由桩后应力拱过渡到桩间应力拱,直至桩周土体产生滑动;埋深较浅时,主要由桩体限制桩周土体位移;随着埋藏深度的增加,由桩体及桩后、桩间、桩前土体共同承担下滑力作用,随着埋深的进一步增大,桩后土拱拱高增加及作用范围扩大,此时下滑力主要通过桩后及桩间土拱作用及桩体承担。
In order to reveal the interaction mechanism between anti-slide pile and landslide body and the development and change characteristics of anti-slide pile arching effect, FLAC3D software was used to simulate the interaction between anti-slide pile and landslide body. The displacement of different landslide bodies Variation of soil mass displacement and soil stress between piles. The results show that the soil arching effect gradually changes from the post-stress arch to the stress arch between the piles until the soil around the piles slides. When the depth is shallow, the soil arching is mainly limited by the piles Body displacement; with the increase of burial depth, the effect of sliding force is shared by the pile body, the pile behind the pile, the pile between the pile and the pile before the pile. With the further increase of the buried depth, At this time, the sliding force mainly through the post-piles and soil arching between the piles and bear.