微型桩与帷幕的不同位置对复合土钉墙力学性状的影响分析

发布时间：2018-04-27 21:24

本文选题：复合土钉墙 + 微型桩　；参考：《岩土力学》2015年S1期

【摘要】：基坑工程中微型桩和止水帷幕的复合土钉墙是常用支护结构型式之一。在支护结构设计和施工时布置微型桩与帷幕的位置具有随意性,普遍忽视微型桩在帷幕内外不同位置对于支护结构力学性状的影响。依托济南某基坑工程,通过现场测试和数值模拟的对比分析,获得微型桩在帷幕内外两种位置条件下支护结构位移、土钉内力等变形及受力特征。分析结果表明,微型桩的位置不影响支护结构变形和内力的总体趋势;无坡顶荷载时,微型桩位置不同产生的差别不大;存在坡顶荷载时微型桩位于帷幕内侧时支护结构变形较小,土钉受力更合理,建议实际工程优先采用。
[Abstract]:The composite soil nailing wall of miniature pile and waterproof curtain is one of the commonly used supporting structures in foundation pit engineering. In the design and construction of supporting structure, the position of micro-pile and curtain is random, and the influence of different positions of micro-pile inside and outside the curtain on the mechanical properties of supporting structure is generally ignored. Based on a foundation pit project in Jinan, the deformation and stress characteristics of supporting structure such as displacement of supporting structure and internal force of soil nailing were obtained under the condition of inside and outside the curtain by field test and numerical simulation. The results show that the position of micro-pile does not affect the general trend of deformation and internal force of supporting structure, and the difference of the position of micro-pile is not obvious when there is no slope top load. The deformation of the supporting structure is smaller and the stress of soil nailing is more reasonable when the micro-pile is located inside the curtain under the load of slope top. It is suggested that practical engineering should be given priority.
【作者单位】：山东大学土建与水利学院;山东大学基坑与深基础工程技术研究中心;
【基金】：济南市科技计划(No.201201145) 山东省优秀中青年科学家科研奖励基金(No.BS2013SF024)
【分类号】：TU476

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