盾构管片拼装过程中破裂现象的可靠度分析  

Probability Analysis of the Segment Cracking during Lining Assembly in Shield Tunnel Construction

作　　者：董明钢[1] 张雷[1] 姚海明[1] 冯紫良[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《地下空间与工程学报》2006年第6期916-920,925,共6页Chinese Journal of Underground Space and Engineering

摘　　要：对于盾构管片在拼装过程中常常发生的破裂现象,文章根据现场调查和有限元计算,分析了引起盾构管片拼装过程中破裂的主要影响因素,建立了判断破裂发生的极限状态方程,并结合工程实例应用随机有限元技术计算了109种组合情况下的可靠度指标,获得了可靠度指标随各个随机变量标准差而变化的等值线分布规律。研究结果能够较好地对于目前工程中常见的管片施工开裂现象进行定量的解释。On the basis of the field investigation in Shanghai and FEM, some main factors influencing the segment cracking during lining assembly are analyzed. After a simple, but meaningful limited equation has been proposed, 109 work conditions are chosen for the representation of the variety of the different composition of random variables and then relevant reliability indexes are computed by using stochastic finite element technique. The result obtained can be used to explain the phenomenon of lining segment cracking quantitatively and reasonably.

关 键 词：可靠度 盾构 管片 破裂 

分 类 号：TU348[建筑科学—结构工程]