基于强度折减法的土钉支护结构稳定性分析  

Strength-reduction Method-based Stability Analysis of Soil-nailing Protection Structure

作　　者：古海东[1,2] 杨敏[1,2] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《同济大学学报（自然科学版）》2012年第7期1003-1007,1014,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(40972179)

摘　　要：运用有限元强度折减法分析土钉支护结构稳定性,通过离心机模型试验验证了该方法的可行性,并针对工程实例将强度折减法和现行规程方法进行比较分析,对土钉支护结构稳定性及其影响因素进行了比较全面的分析.研究结果表明:采用强度析减法得出的土钉间距和土钉直径对支护结构稳定性的影响比规程方法大;土钉长度和土体强度参数对支护结构稳定性的影响与规程方法的结果基本一致.The stability of soil-nailing protection structure was analyzed with the strength-reduction finite element method（FEM） and the feasibility of this method was validated by centrifuge model test.Then,this method was compared with current specification through a case study.Based on these,a set of analysis is implemented on the stability of soil-nailing protection structure and its affecting factors.The results show that the influence of the diameter and the spacing of the soil-nailing on stability of soil-nailing protection structure is greater than that obtained from the method in the specification.There is a good agreement between the present study and the specification method on the study of stability of soil-nailing protection structure influenced by the length of soil-nailing and the strength parameters of soil.

关 键 词：土钉支护 强度折减法 离心机试验 稳定性分析 

分 类 号：TU473.2[建筑科学—结构工程]