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随着城市公共设施不断的完善,在新建城市管网、电力、通讯等公共项目时,短距离小管径的管道一般采用拉管的方式,大口径长距离一般采用顶管的方式施工,因此工作坑的施工方法尤为重要。常用的简便快捷的方法有钢板桩支护、钻孔灌注桩支护方式,本文结合过某过河顶管工程采用钻孔灌注桩及内衬钢板相结合的支撑方式,采用不排水开挖,有效的保护了周边建(构)筑物的稳定,这一成功施工案例为工作井支护方案的设计及优化打开了新的思路。
With the continuous improvement of urban public facilities, when building new urban pipe networks, electric power, communications and other public projects, pipelines with small pipe diameters in short distances generally adopt the method of pulling pipes, and large-diameter long distances generally adopt pipe jacking methods. Therefore, Construction pit work is particularly important. Commonly used simple and quick method of steel sheet pile support, bored pile support method, combined with a cross-river pipe project using bored piles and lined steel plate combination of support, the use of non-drainage excavation, Which effectively protected the stability of the surrounding structures. This successful construction case opened up new ideas for the design and optimization of the working well support scheme.