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工程简介北京地铁10号线一期工程土建施工9# 合同段明挖区间隧道,西起北土城站向东至惠新东街盾构调头井,全长434.3m。本段隧道槽宽10.6-20.4 m,深12.7-18.5m, 自西向东坡度为3‰-2.4‰,主体结构为现浇钢筋混凝土。依据招标文件,根据本工程所在的工程地质及水文地质条件、周边环境、场地条件,本工程区间明挖段围护结构采用钻孔灌注桩+钢支撑,混凝土等级为C25, 分段明开挖+内支撑进行结构施工。桩顶设钢筋混凝土冠梁,桩间采用挂网喷射混凝土护面的形式,并在桩项冠梁上施工砖
Brief introduction of the project Beijing Metro Line 10, the first phase of the civil construction of 9 # contract section Ming dug tunnel, west from North Tucheng station East Huixin East shield shield well, a total length of 434.3m. This section of the tunnel width of 10.6-20.4 m, depth 12.7-18.5m, from west to east slope of 3 ‰ -2.4 ‰, the main structure of cast-in-place reinforced concrete. According to the bidding documents, according to the engineering geological and hydrogeological conditions, surrounding environment and site conditions where the project is located, the bracing structure of the bright-out section of this project adopts the bored pile + steel support with the concrete grade of C25 and the excavation of the sections + Internal support for structural construction. The top of the pile is set with reinforced concrete crown beam, the form of net-sprayed concrete retaining wall is adopted between the piles, and the brick