土钉支护现场测试及三维数值模拟分析

英文篇名：IN SITU TEST AND THREE-DIMENSIONAL SIMULATION ANALYSIS OF SOIL NAILING SUPPORT
中文刊名：工程地质学报
英文刊名：Journal of Engineering Geology
作者：李志刚 ; 秦四清 ; 张冰峰
英文作者：LI Zhigang QIN Siqing ZHANG Bingfeng (Institute of Geology and Geophysics ; ChineseAcademy of Sciences ; Beijing 100029)
中文关键词：土钉支护体系 ; 现场测试三维模拟 ; 位移时步变化 ; 轴力 ; 塑性变形
英文关键词：Soil nailing support system ; In situ test ; Three-dimensional simulation ; Axial force ; Plastic displacement
出版日期：2004-03-20
机构：中国科学院地质与地球物理研究所,中国科学院地质与地球物理研究所,中国科学院地质与地球物理研究所北京,100029 ,北京,100029 ,北京,100029
年：2004
期：01
出版单位：工程地质学报

摘要

在进行土钉轴力和边坡位移测试的基础上 ,进行了土钉支护的三维数值模拟研究 ,对边坡位移、土钉轴力、塑性区分布等分别作了较为深入的探讨 ,认识到土钉与土体相互作用形成了一个完整的支护体系 ;基坑失稳破坏并非传统意义上的土体和土钉的破坏 ,而是土钉支护体系的整体性破坏 ;土钉支护体系的形成正是通过土钉的分担作用、应力传递与扩散作用来实现的 ,这是土钉支护作用的实质
Based on soil nail axial force and slope displacement testing, a 3-D soil nailing support numerical model is constructed and the slope displacement, soil nail axial force, plastic displacement are deeply discussed in this paper.Most meaningful conclusions are drawn: soil nail and soil mass form a whole supporting system through their interaction; foundation pit in stability is not due to soil mass failure or soil nail failure, but is due to the instability of whole supporting system; the supporting system is formed by soil nail bearing partial force and stress transferring and diffusing. These are the essence of the soil nail support.

引文

[1]　秦四清,王建党著.土钉支护机理与优化设计[M ].北京:地质出版社,1999.QinSiqing,etal..Boltingmechanismandoptimaldesignofsoilnailing.Beijing:GeologicalPublishingHouse,1999.
    [2]　秦四清等.深基坑工程优化设计[M ].北京:地震出版社,1998.QinSiqing,etal..Optimaldesignofdeepfoundationpitengi neering.Beijing:SeismicPress,1995.
    [3]　张明聚,郭忠贤.土钉支护工作性能的现场测试研究[J].岩土工程学报,2001,23(3):319～323.Zhangmingju,etal..Researchonbehaviorsofsoilnailingbyfieldtest.JournalofGeotechnicalEngineering,2001,23(3):319～323.
    [4]　贾洪.钉土相互作用的剪滞力理论分析[J].工程地质学报,2002,10(2):156～159.Jiahong.Sheartheoryanalysisonsoil-nailinteraction.Beijing:JournalofEngineeringGeology,2002,10(2):156～159