土钉支护整体稳定验算与局部稳定验算间的关系  

RELATIONSHIP BETWEEN GLOBAL STABILITY AND LOCAL STABILITY ANALYSIS OF SOIL NAILING

作　　者：宋广[1] 宋二祥[1] 柳建国[2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]中冶建筑研究总院有限公司地基技术研究所,北京100088

出　　处：《工业建筑》2012年第12期46-52,共7页Industrial Construction

基　　金："十一五"国家科技支撑计划项目(2008BAJ06B01-5)

摘　　要：针对现行基坑支护规程中关于土钉支护的设计验算,讨论了其整体稳定验算和局部稳定验算的必要性问题。研究表明:对于一般土钉支护,当土钉的破坏服从理想弹塑性或硬化弹塑性规律时,只需进行整体稳定验算,但满足局部稳定验算可使设计方案更为合理;当土钉的破坏呈软化规律时,整体稳定验算和局部稳定验算都是必要的,但当土体相对黏性较大时,只需按局部稳定验算来设计土钉支护结构,无需进行整体稳定验算。Based on the design method of soil nailing in the current codes for excavation support, the need of global stability checking and local stability checking for soil nailing in design was discussed, It was shown that only global stability checking was necessary when the failure of the soil nailing obeyed the law of elastic-perfectly plastic or hardening. However, local stability checking could make the design more reasonable. Global stability checking were local stability checking were both needed when the failure of the soil nailing possessed of a softening nature. But local stability checking was sufficient when the cohesion of the soil was relatively large.

关 键 词：土钉支护 整体稳定 局部稳定 

分 类 号：TU476[建筑科学—结构工程]