饱和粉土层盾构补偿始发解决不均衡切削问题适应性分析  

Adaptability Analysis of Shield Compensation Originating in Saturated Silt Layer to Solve Unbalanced Cutting

作　　者：徐骏青 Xu Junqing(China Railway 22nd Bureau Group Rail Engineering Co.,Ltd.,Beijing 100043,China)

机构地区：[1]中铁二十二局集团有限公司,北京100043

出　　处：《市政技术》2023年第4期95-101,共7页Journal of Municipal Technology

摘　　要：依托北京地铁昌平线南延学院桥站—西土城站区间盾构段侧向始发背景,分析非常规侧向始发条件下,如何通过补偿始发解决盾构始发阶段不均衡切削问题,对补偿钢套筒以及钢套筒内类原状土强度特性的固化土填充进行适应性分析,对补偿钢套筒的结构设计进行验算分析并通过应力监测进行论证。通过在水泥土的基础上进行改良,增加固化剂和激发剂使得固化土接近原状土注浆加固后的土体特性,形成完整的补偿始发技术。Relying on the background of the lateral originating of the shield section between Xueyuanqiao Station and Xitucheng Station in the south extension of Beijing Metro Changping Line,how to solve the problem of unbalanced cutting in the initial stage of the shield was analyzed under the unconventional conditions by the compensation of the lateral departure.The adaptability of the compensation steel sleeve and the solidified soil filling with the strength characteristics of the undisturbed soil in the sleeve were analyzed.The structural design was checked and demonstrated through sti'ess monitoring.Through the improvement on the basis of cement-soil,adding solidified agent and activator to make the solidified soil close to the soil characteristics after grouting and reinforcement of undisturbed soil,and then a complete compensation origination technology was formed.

关 键 词：盾构隧道 侧向始发 补偿钢环 固化土填充 

分 类 号：U231.3[交通运输工程—道路与铁道工程]