府谷县阴塔沟滑坡抗滑桩设计优化研究

发布时间：2018-03-05 05:17

本文选题：顺层滑坡　切入点：抗滑桩　出处：《西安科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来府谷县为了适应县域经济快速发展,并解决建设用地少的问题,进行了大面积的挖山填沟和大型工程建设。因受构造(北西向单斜构造)、地层结构(煤系地层的砂泥岩互层)和软弱结构带(泥岩)的控制,在开挖坡脚和剥挖上覆硬壳层的人类工程活动诱发下,府谷县境内山体西侧已形成并广泛发育基岩顺层滑坡。此类滑坡多采用刷方减载+抗滑桩支档+坡面防护+排水系统的综合治理方案,为了确定技术可行和经济合理的抗滑桩支档措施,以府谷县典型岩质顺层滑坡——阴塔沟滑坡为例,对抗滑桩设计进行优化研究并进行了方案对比分析,主要研究结论如下:1)对抗滑桩设计要素进行了正交设计试验,得出了抗滑桩设计参数对抗滑桩性能的影响程度由大到小的顺序为:桩间距、锚固深度、桩截面长度、桩截面宽度;2)基于敏感性分析结果,通过对抗滑桩设计要素单因素分析,得出了随设计参数改变抗滑桩内力的变化规律,并提出了桩间距和锚固深度的合理性取值范围;3)通过编写计算机程序,以抗滑桩的工程造价为目标函数、抗滑桩的桩身截面尺寸为变量,计算了桩身截面尺寸最优值;4)最后将优化后的设计方案与原设计方案进行对比分析,得出最优的抗滑桩设计方案。
[Abstract]:In recent years, in order to adapt to the rapid development of the county economy and solve the problem of lack of construction land, A large area of excavating and filling trenches and large scale projects were carried out, which were controlled by structure (NW monoclinal structure), stratigraphic structure (sand and mudstone interbedded in coal measure strata) and weak structural zone (mudstone). Induced by human engineering activities to excavate the foot of the slope and to peel and cover the hard shell, The west side of the mountain body in Fugu County has formed and widely developed bedrock bedding landslides. Most of these landslides adopt the comprehensive treatment scheme of brush-side anti-slide pile supporting slope protection and drainage system. In order to determine the feasible and economical anti-slide pile supporting measures, taking the typical rock-bedding landslide-Yindagou landslide in Fugu County as an example, the design of anti-slide pile was optimized and the scheme was compared and analyzed. The main conclusions are as follows: (1) orthogonal design test is carried out on the design elements of anti-slide pile, and the order of influence of anti-slide pile design parameters from large to small is as follows: pile spacing, anchoring depth, pile cross-section length. Based on the results of sensitivity analysis and single factor analysis of design elements of anti-slide pile, the variation law of internal force of anti-slide pile with design parameters is obtained. The reasonable value range of pile spacing and anchoring depth is put forward. By compiling computer program, the project cost of anti-slide pile is taken as the objective function, and the cross-section size of anti-slide pile is taken as variable. Finally, the optimum design scheme of anti-slide pile is obtained by comparing the optimized design scheme with the original design scheme.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU473.1;P642.22

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