摘要
在轨道交通网络化建设过程中"十"字换乘车站越来越多,一般在先建车站中预留后建车站的换乘节点便于后期施工,而在砂土层或者硬土层换乘节点一般设计为"坑中坑"。针对换乘节点处两个方向土压力严重不平衡的"坑中坑"施工,从土压力平衡的角度归纳总结了两种常用的施工方案,并针对其不足之处提出了基于两个方向土压力自相平衡的基坑施工方案,对撑取代斜撑,无需预留核心土压重或结构压重,保证了工序施工的流水性,加快了工程进展。实践证明该方法是可行的,值得借鉴和应用。
In the process of road traffic network construction in the ten station more and more, to build a station in the first transfer node is generally reserved for later construction after the construction of the station, while in sandy soil or hard soil transfer nodes are generally designed for a ＂pit in pit＂. For the transfer node two directions of earth pressure imbalance ＂pit in pit＂ construction, summed up the earth pressure balance and summarized two common construction scheme, and puts forward the foundation pit construction scheme of the two directions of earth pressure based on self balanced for its shortcomings, to replace the brace brace, no reserved core soil weight or structure weight and ensure the water construction process, to speed up the progress of the project. Practice has proved that this method is feasible, and it is worth learning and application.
出处
《施工技术》
CAS
北大核心
2017年第22期105-107,共3页
Construction Technology
关键词
地铁
坑中坑
核心土
结构压重
施工技术
metro
pit-in-pit
core soil
structural compression
construction
