[关键词]
[摘要]
土拱效应对双排抗滑桩的合理布置和优化设计有重要影响, 而影响土拱效应的因素较多, 本文引入正交试验 的方法, 研究了影响抗滑桩土拱效应的六种因素的主次关系, 以桩边长、桩间距、岩土体性质、泊松比、接触面参数和 排间距六种因素组成六因素五水平的正交实验设计, 基于PLAXIS 有限元软件对抗滑桩的土拱效应进行了数值模 拟。研究结果表明, 桩间距、泊松比和排间距是影响土拱效应主要因素, 岩土体性质、接触面参数和桩边长为次要因 素, 因素间存在耦合作用, 各因素取合适的水平, 土拱效应会得到较好的发挥。
[Key word]
[Abstract]
It is o f g reat signif icant to consider soil arching effect for the reasonable ar rang ement and o pt imization desig n of do uble row anti2slide pile. H ow ever ther e are many facto rs affecting soil arching effect, thus the o rthog onal test is used t o study the major and minor relatio ns of the six facto rs that affect t he soil ar ching effect of ant i2slide pile. The six factor s, including pile length, pile spacing , pro per ty parameter s, Po isson's r atio, interface parameters and row spacing , fo rm six factor s with five levels of o rthog onal test desig n, and the finite element analy sis softw are PLAXIS is used to car ry out the numer ical simulation. The re2 sults show that the pile spacing , the Po isson's rat io and row spacing are the majo r factor s o f so il ar ching effect, and pr operty pa2 r ameters, inter face par amet ers and pile leng th ar e the minor factor s. There ex ists coupled effect among these facto rs and the combinat ion of their appr opriate levels w ill be benefit to the so il arching effect.
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[基金项目]
国家自然科学基金( 41301015) ; 国家大坝安全工程技术研究中心开放基金( NDSKFJJ 1201) ; 河北省教育厅自然科学重点项目( ZD2015073) 经济学院国家自然科学预研基金( sjy201203)