连续桩键结构的抗滑机制及加固效果研究

发布时间：2018-04-24 07:18

本文选题：连续桩键结构 + 抗滑机制　；参考：《岩土力学》2014年09期

【摘要】：连续桩键是一种新型抗滑结构,结合了阻滑键和抗滑桩结构型式的综合功能。采用二维FLAC程序对连续桩键结构与滑坡的作用效应进行了数值模拟。分析表明,结构的内在抗滑机制主要体现于有效减小滑带区域的剪切变形量、降低塑性区的发展程度、阻滞滑坡体的整体位移、调动滑体区域的岩土体抗力等方面,而其外在抗滑机制则对应于结构能有效加固设置区域岩土体和充分发挥整体抗滑支挡这两种作用。总体上结构处于剪切、弯曲和拉压的复杂受力状态,内力变形连续分布且均衡,相当于整体协调受力的连续刚架体系,其抗滑效果更加明显,并表现出良好的工作状态。连续桩键结构克服了单体结构的应用局限问题,而更充分发挥了对滑坡体的加固阻滑效果,显著提高了滑坡体的整体稳定安全裕度,对滑坡治理工程有更广泛的适用性,已被成功应用于三峡库区最复杂的地质灾害治理项目——猴子石滑坡治理工程,取得了良好的治理效果。
[Abstract]:Continuous pile key is a new type of anti-slide structure, which combines the function of anti-slide key and anti-slide pile structure. The effect of continuous pile bond structure on landslide is numerically simulated by using two dimensional FLAC program. The analysis shows that the inherent anti-slide mechanism of the structure is mainly reflected in the following aspects: effectively reducing the shear deformation in the slip zone, reducing the development of the plastic zone, blocking the overall displacement of the landslide body, and mobilizing the resistance of the rock and soil in the sliding zone, etc. The external anti-slide mechanism corresponds to the two functions of the structure which can effectively strengthen and set up the regional rock and soil and give full play to the overall anti-slide support. On the whole, the structure is in the complex state of shear, bending and tension and compression, and the internal force and deformation are distributed continuously and equably, which is equivalent to the whole coordinated force, and the anti-slide effect is more obvious, and it shows a good working state. The continuous pile bond structure overcomes the application limitation of the single structure, and gives full play to the effect of the landslide body reinforcement and skid resistance, improves the overall stability and safety margin of the landslide body, and has wider applicability to the landslide treatment project. It has been successfully applied to the most complex geological disaster control project in the three Gorges Reservoir area, the Monkey Rock landslide treatment Project, which has achieved good control effect.
【作者单位】：长江勘测规划设计研究院;中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室;
【基金】：国家自然科学基金资助项目(No.10872210)
【分类号】：TU473.1

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