滑坡推力在多排抗滑桩上的分配情况研究

发布时间：2018-06-19 02:40

本文选题：道路工程 + 滑坡推力　；参考：《公路交通科技》2014年10期

【摘要】：传统滑坡推力计算,通常应用不平衡推力法进行抗滑桩设计。但对于多排抗滑桩治理工程的设计,常规方法无法准确计算每排桩上的推力大小以及分布形式,而有限元强度折减法计算滑坡推力遵循桩-土相互作用原则,可以得到桩后推力与桩前抗力分布形式。以十堰一天水高速某多级剪出口滑坡为研究对象,通过对破碎岩石老滑坡的成因与滑动机制进行分析,明确促使滑坡复活的各种因素。在此基础上应用Plaxis软件建立有限元模型,通过数值计算方法得到边坡开挖过程、降雨过程与强度折减过程3种不同工况下抗滑桩桩后推力与桩前抗力的分布情况,进而得到每排抗滑桩的滑坡推力分担比。该方法避免了传统方法存在的种种局限性,为多排抗滑桩设计提供一种行之有效的解决办法。
[Abstract]:In traditional landslide thrust calculation, unbalanced thrust method is usually used to design anti-slide pile. However, for the design of multi-row anti-slide pile treatment project, the conventional method can not accurately calculate the size and distribution of thrust on each row of piles, while the finite element strength reduction method for calculating landslide thrust follows the principle of pile-soil interaction. The distribution of post-pile thrust and pile-front resistance can be obtained. Based on the analysis of the causes and sliding mechanism of the old landslide of broken rock, this paper takes the landslide of a multistage shear exit at a high speed in Shiyan and Yishui as the research object, and makes clear the various factors that promote the revival of the landslide. On this basis, the finite element model is established by using Plaxis software, and the distribution of post-thrust and pile front resistance of anti-slide pile under three different working conditions, such as slope excavation process, rainfall process and strength reduction process, is obtained by numerical calculation method. Then the ratio of landslide thrust of each row of anti-slide pile is obtained. This method avoids the limitations of traditional methods and provides an effective solution for the design of multi-row anti-slide piles.
【作者单位】：西南交通大学土木工程学院;中铁西北科学研究院有限公司;
【基金】：国家自然科学基金项目(51178402)
【分类号】：U418.55

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