浅埋深洞室的明顶暗墙法施工

Construction of Shallow Buring and Deep Tunnel Chamber with Open Top and Subwall method

结合东雷二期汉村退水与洛惠渠东干渠交叉工程实例,总结出适合浅埋深洞室施工的新方法——明顶暗墙法。与传统施工方法比较具有工程量小、开挖难度低、缩短工期、减少对地面干扰、造价低等特点,避免了常规法施工中易发生的因回填土不均衡或填土不均匀沉陷引起洞身裂缝等问题。

Combined with the engineering examples in Donglei Ⅱ project, the open top and subwall method, which is a new method of construction for the shallow burying and deep tunnel chamber, is developed. The method has the characteristics such as a little engineering quantity, easy of cutting, shortening the project time limit, reducing the disturbance to ground surface and low costs et al. The crack of tunnel body caused by the nonuniform settlement is avoided in construction with this method.