基坑锚杆与土钉复合支护的FLAC数值分析

英文篇名：Numerical Analysis on the Composite Support Techinque of Prestressed Anchor Arm and Brad by FLAC
中文刊名：西北地震学报
英文刊名：Northwestern Seismological Journal
作者：冯永 ; 王琳鸽
英文作者：FENG Yong1 ; WANG Lin-ge2 (1.Civil Engineering School of Henan University of Technology ; Zhengzhou 450001 ; China ; 2.Civil&Material Department of Henan University of Urban Construction ; Henan Pingdingshan 467036 ; China)
中文关键词：基坑 ; 锚杆与土钉复合支护 ; FLAC数值分析
英文关键词：Foundation pit ; Composite support technique of prestressed anchor arm and brad ; Flac numerical analysis
出版日期：2011-03-30
机构：河南工业大学土木建筑学院;河南城建学院土木与材料工程系;
年：2011
期：01
出版单位：西北地震学报

摘要

预应力锚杆+土钉复合支护技术在基坑工程中的应用已越来越广泛。本文以郑州市王家寨基坑工程为实例,采用FLAC数值分析法建立了基坑锚杆与土钉复合支护计算模型。对土体选取理想弹塑性本构模型,对预应力锚杆和土钉选取cable单元,同时考虑支护体系与土体之间的相互作用,对基坑的开挖支护的动态过程进行了模拟分析,研究了基坑开挖对土体的扰动、基坑位移变化以及土钉和锚杆的内力分布规律。研究结论对锚杆与土钉复合支护设计具有一定借鉴意义。
The composite support technique of prestressed anchor arm and brad has been more and more widely used in foundation pit excavating.Taking a deep foundation excavation at Wangjiazhai,Zhengzhou city as an example,the computation model for the composite support technique of prestressed anchor arm and brad is established using FLAC numerical analysis method.The dynamic process of foundation excavating and support,considering the mutual effect between the support system and soil mass,is simulated.The destabilization of excavation on soil,the displacement change of foundation pit and inner force of brad and prestressed anchor are studied.The conclusions had some reference value for design and construction of the upport technique.

引文

[1]曾宪明,黄久松,王作民,等.土钉支护设计与施工手册[S].北京:中国建筑工业出版社,2003.
    [2]贾金青.深基坑预应力锚杆柔性支护法的理论及实践[M].北京:中国建筑工业出版社,2006.
    [3]王明龙,万林海,黄志全,等.基于FLAC3D的土钉内力分析[J].工程地质学报,2006,14(3):411-418.
    [4]刘波,韩彦辉(美国).FLAC原理、实例与应用指南[M].北京:人民交通出版社,2005.
    [5]吴忠诚,汤连生,廖志强,等.深基坑复合土钉墙支护FLAC-3D模拟及大型现场原位测试研究[J].岩土工程学报,2006,28(增刊):1460-1465.
    [6]丁秀丽,盛谦,等.预应力锚索锚固机理的数值模拟试验研究[J].岩石力学与工程学报,2002,21(7):980-988.
    [7]李志刚,秦四清,张冰峰.土钉支护现场测试及三维竖向模拟[J].工程地质学报,2004,12(1):69-73.
    [8]卢荫盟,沈俊,曾宪桃.预应力锚索加固基坑的三维数值分析[J].岩土工程学报,2005,27(10):1198-1202.
    [9]唐益群,崔振东,王兴汉.密集高层建筑群的工程效应引起地面沉降的初步研究[J].西北地震学报,2007,29(2):105-108.