供水干管上方地铁区间开挖设计施工方案研究  

The Design and Construction Research of Excavation of Metro Cut-interval over Main Water Pipe

作　　者：姚燕明[1] 谭满生 

机构地区：[1]宁波市轨道交通工程建设指挥部,浙江宁波315000 [2]中铁隧道勘测设计院有限公司,天津300133

出　　处：《施工技术》2015年第1期57-60,共4页Construction Technology

摘　　要：轨道交通明挖区间与城市环网主干水管相交,区间在主干供水管道上穿越。城市供水主干环网直径2.0m,其上明挖区间基坑开挖深度约5.60m,基坑底部与主干供水管道相距约1.57m。在明挖基坑施工过程中,以及后期地铁运营过程中需要保证管道安全。通过采取小基坑施工、MJS工法桩地基加固、复合围护结构、设置桩基等设计措施,分层分块开挖、临时堆载、底板分块浇筑等施工措施,确定水管的保护方案。经计算分析后,认为基坑开挖隆起及后期运营沉降能够保证管道的变形要求。The cut-interval of metro line crossed in the upper intersects the ring network water pipe in space. The diameter of the city network water pipe is 2.0m, and its upper depth of the foundation excavation is 5.6m. The distance between the bottom of the foundation excavation and the pipe is about 1.5m. During the excavation of the pit and the operation of the metro line, the safety of the pipe should be ensured. The measures of small foundation excavation, MJS soil reinforcement, composite supporting structure, and setting piles are discussed in design. The construction measures of layering and block excavation, temporary preloading, and plate block casting are also presented. After calculation, the uplift during excavation and the post settlement during operation can meet the requirement of the pipe deformation.

关 键 词：基坑 地铁 供水管 变形 设计 施工 

分 类 号：TU45[建筑科学—岩土工程]