第39参第3期 2017年6月
土水建筑与环境工程
Journal of Civil,Architectural &.Environmental Engineering
doi:10.11835/j. issn. 16744764. 2017. 03. 014
复合土钉支护转角有利影响范围
张宗领，王士革，刘林超
（信阳师范学院建筑与土木工程学院，河南信阳464000）
Vol. 39 No. 3 Jun.2017
品获效品
摘要：基坑复合土钉墙转角处有明显的空间效应，受力变形较小，对支护结构有利，但不清楚转角定量的有利影响范围，目前设计中仍按照与基坑中部一样保守设计，为在此范围内降低土钉用量，避免保守设计，对水泥土搅拌桩复合土钉支护结构建立了全尺寸整体三维有限元模型，这种模型包含基坑的转角，能考虑基的空间效应，通过建立接触面单元，能考虑土体和搅拌桩、土体和土钉的相互作用，量化分析了基坑转角对支护结构受力和变形的有利影响范围，计算结果表明，基坑转角对开挖面水平位移、地表沉降、坑底隆起、土钉轴力的有利影响范图分别约为1.3、1、1、1.2倍的开挖深度。经与实际工程现场实测值对比，验证了该模型分析结果的可靠性，同时分析结果优于平面
研究方法。
关键词：复合土钉支护；基坑转角；有利影响范图；量化分析：有限元分析
中图分类号：TU476
文献标志码：A
文章编号：1674-4764（2017)03-0107-08
Beneficialaffectedareaofcornerofcompositesoilnailedwall
Zhang Zongling,Wang Shige,Liu Linchao
(School of Architecture and Civil Engineering, Xinyang Normal University, Xinyang 464000, Henen, P. R. China)
Abstract: Foundation pit corner of composite soil nailed wall has obvious spatial effect. Supporting structure near foundation pit corner is safer due to smaller stress and deformation, Whilst at present quantitative beneficial affected area of foundation pit corner to the supporting structure are not known and designs are the same in the middle and the corner of foundation pit. In order to reduce the material consumption and avoid overcautious design, the construction process of excavation and supporting of the composite soil nailed wall of soil nailing and cement-soil piles for deep foundation excavation was simulated through establishing a whole three-dimensional finite element model, which includes the corner of the foundation pit and can consider spatial effect of corner location and the interaction between soil nailing,cement-soil piles and soil through establishing interface elements. Beneficial affected area of foundation pit corner to stress and deformation of the supporting structure is analyzed and quantified. The calculation results show that
收稿日期：2016-02-15
基金项目：国家自然科学基金（U1504505）；河南省高等学校重点科研项目（16A560007）：信阳师范学院重大课题预研
（2015-ZDYY-172)；信阳师范学院青年骨干教师资助计划（2014GGJS-16），
作者简介：张宗领（1979-），男，主要从事边坡、基坑支护研究，（E-mail)zzl790206@sina.com。 Received: 2016-02-15
Foundation item: National Natural Science Foundation of China(No. U1504505) ; Key Scientific Research Project of Henan
Province(No. 16A560007) ; Major Beforehand Research Project of Xinyang Normal University(No. 2015-ZDYY-172) ; Youth Backbone Teacher Plan Project of Xinyang Normal University(No. 2014GGJS-16).
Author brief:Zhang Zongling(1979-) , main research interests: support of slope and foundation pit, (E-mail) zzl790206 @
sina.com.
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