加筋水泥土斜锚桩基坑维护结构的稳定性分析及其应用  

STABILITY ANALYSIS OF INCLINED ANCHORAGE PILE FOR REINFORCED CEMENT-SOIL IN BRACING EXCAVATION STRUCTURE AND ITS APPLICATION

作　　者：刘全林[1] 杨有莲[2] 

机构地区：[1]安徽理工大学土木工程系,安徽淮南232001 [2]河海大学土木工程学院,江苏南京210098

出　　处：《岩石力学与工程学报》2005年第A02期5331-5336,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：安徽省自然科学基金资助项目(03044402)

摘　　要：加筋水泥土斜锚桩通过对土体加注水泥搅拌和拉锚,实现对地层的主动加固,在基坑的四周形成一重力式挡土结构,维护基坑壁的稳定。首先简要介绍了其工作原理及对基坑稳定性的作用机理。利用Kranz理论的有关假设和条分法原理,建立该维护结构的稳定性分析简化模型。该计算模型克服了Kranz理论的不足,简化了条分法的计算,具有较高的实用价值。最后,对广州某地铁车站基坑的加筋水泥土斜锚桩维护结构进行稳定性计算分析,计算结果与实测结果较接近,从而验证了该方法的可靠性。The inclined anchorage pile of reinforced cement-soil can form a gravity bulkhead in excavation. It is an active reinforcement method by agitating earth mixed with cement and buried anchor bar. The working principle of reinforced with steel strips and inclined cement-soil pile are introduced, and its mechanism on the strain and stability of excavation is also analyzed. By using slice method and Kranz theory, a simplified model of stability analysis in excavation structure braced by the anchoring pile is established. This method can overcome the shortcoming in Kranz theory, and it can simplify the calculation of slice method. So it has practical value, and an actual example using this method in Guangzhou underground station to analyze the stability is studied, which indicates its feasibility.

关 键 词：桩基工程 加筋水泥土 斜锚桩 稳定性分析 简化稳定性模型 地铁站 深基坑 

分 类 号：TU431[建筑科学—岩土工程]