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随着城市建设中地下空间开发利用愈来愈多,深基坑工程变得越来越复杂,对其支护形式的研究也面临前所未有的挑战。以石家庄市某深基坑工程为例,采用非线性有限元方法对桩锚-土钉墙分段组合和桩锚-土钉墙分级组合两种不同组合支护形式下的坡顶水平位移、竖向位移、深层土体位移进行分析。对比发现,桩锚-土钉墙分级支护较桩锚-土钉墙分段支护在坡顶水平位移、竖向位移、深层土体位移方面控制效果更佳。
With the development and utilization of underground space in urban construction more and more, the engineering of deep foundation pit becomes more and more complex, and the research on the form of its support also faces an unprecedented challenge. Taking a deep foundation pit project in Shijiazhuang as an example, the horizontal displacement of the top of the slope under two different combinations of pile-grouting-soil nailing wall segment combination and pile-anchor-soil nailing wall classification combination is adopted by using the nonlinear finite element method. Vertical displacement, deep soil displacement analysis. The comparison shows that the grading support of pile anchor - soil nailing wall is better than the pile anchor - soil nailing wall segmental support in horizontal displacement, vertical displacement and deep soil displacement.