进水箱涵跨河流大开挖法施工

Construction of Intake Box Culvert by Large Excavation Method across River

引调水工程施工中,穿越河流一直是施工中的重点和难点之一。工程中多采用定向钻穿越、盾构穿越、钻爆隧洞、顶管隧洞、大开挖法等方式穿越,从环境影响,工程地质条件和工程造价等方面进行比选,工程采用大开挖法进行河流穿越,通过采用悬挂式防渗墙帷幕,管井降水,放坡开挖的方式进行基坑开挖,箱涵结构混凝土施工完成后回填恢复原河道。主要介绍施工过程及遇到的难点及解决措施。

Crossing the river has always been one of the key and difficult points in the construction of diversion and diversion works. Directional drilling, shield tunneling, drilling and blasting tunnels, pipe jacking tunnels and large excavation methods are often used in the project. The river crossing is carried out by large excavation method in terms of environmental impact, engineering geological conditions and project cost. Excavation of foundation pit is carried out by means of suspension cut-off wall curtain, dewatering of pipe wells and slope excavation. The original river channel is restored after concrete construction of box culvert structure is completed.This paper mainly describes the construction process, difficulties encountered and solutions.