考虑剪切抗力的修正土钉单元及其应用  

Amended model of soil nail element and its application

作　　者：胡军[1] 李俊杰[1] 刘德志[1] 

机构地区：[1]大连理工大学土木水利学院,大连116024

出　　处：《岩土力学》2006年第S2期913-917,共5页Rock and Soil Mechanics

基　　金：国家电力公司科学技术项目(编号:SP-2002-03-50-04(01))

摘　　要：通常的有限元和有限差分分析方法都视土钉单元为只能承受单轴拉压的一维单元,不能承受弯矩。事实上大量土钉的剪切抗力对边坡稳定有着不可忽视的贡献。基于 FLAC3D 有限差分方法,提出了一种土钉单元剪切抗力的计算方法,并对某基坑上钉加固体系考虑和不考虑剪切抗力两种情况与实测值进行了对比分析,说明了土钉单元剪切抗力对边坡稳定的作用是不容忽视的,同时也说明提出的土钉单元的剪切抗力计算方法是合理的。Usually,because the soil nail is slender,it offers little bending resistance,finite element method and finite difference method regarding the soil nail as a one dimensional structural element with the capacity to sustain uniaxial tension and compression. In fact,the shear force of the soil nails take very important role in control the displacement and maintain the stability of the slope.The authors proposed a new method to calculate the shear force of the soil nail.An example of foundation pit is illustrated;the results of the soil nail take the shear force into account consistent with the measured i.n-situ very well.Conclusions may be of very practical value in design and construction of soil nailing.

关 键 词：FLAC3D 土钉 剪切抗力 

分 类 号：TU476[建筑科学—结构工程]