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本文通过北京某项目工程实例,浅谈该项目施工阶段范围内原人防干线拆除主体结构完毕后,在C、D地块间重建人防工程,并与原人防工程连通形成整体。一、新建人防隧道构造新建人防通道为复合式衬结构,工程初衬250mm厚,C30喷射混凝土,二衬250mm厚,C30钢筋混凝土。初衬内侧满铺钢筋网片φ6@150×150;初衬格栅连接螺栓φ25。初衬保护层厚度:迎土面
This article through a Beijing project project examples, talked about the construction of the project within the framework of the main body of the demobilization of the main line after the completion of the demolition of C, D plots of civil air defense projects between the reconnection with the original civil air defense project to form a whole. First, the new air defense tunnel construction New air defense tunnel composite lining structure, the initial lining of the project 250mm thick, C30 shotcrete, two lining 250mm thick, C30 reinforced concrete. The first lining of the inner full mesh steel mesh φ6 @ 150 × 150; the first grid connection bolts φ25. Initial lining thickness: Welcome soil surface