软土地区管幕暗挖施工之钢管顶进工法解析

暗挖法作为一种有效降低环境影响的技术,在我国部分城市的岩石及复合地层中得到了应用,在软黏土地区做科研试验项目实施软土地区管幕暗挖施工。以某管幕结构段土建工程为例,对钢管顶进施工进行工法解析。钢管顶进施工工法是管幕暗挖施工的第一步,通过带锁扣的钢管间连接形成一个闭合帷幕,将内外水土体隔离,然后在管幕的围护下进行暗挖,最终形成大断面地下空间,为后续开挖与结构施工提供条件。

Analysis on Pipe Jacking Method for Underground Excavation of Pipe Curtain in Soft Soil Area

The underground excavation method as an effective technology to reduce the environmental influence has been applied in the rock and composite stratum of some cities in China.The research projects are carried out in soil clay area in order to implement the underground excavation of pipe curtain in soft soil area.Taking a pipe curtain structural section civil engineering project as an example,the jacking construction method of steel pipe is analyzed.The steel pipe jacking construction method is the first step of the underground excavation of the pipe curtain.A closed curtain is formed by connecting the steel pipes with locks to isolate the internal and external water and soil bodies.Then,the underground excavation is carried out under the enclosure of pipe curtain.Finally,a large section of underground space is formed,which provides the conditions for the follow-up excavation and structural construction.