CRD法穿越粉细砂岩隧道施工要点分析

Analysis on Construction Gist of CRD Method Crossing Silty-fine Sandstone Tunnel

在隧道软弱地层施工中,CRD法(交叉中隔壁法)是一种常用的施工方法。利用CRD法进行施工可以有效防止支护结构出现下沉和变形,防止土体出现水平位移,降低地面沉降。以马家坡隧道为例,对隧道工程地质情况进行了分析,经过研究后设计采用CRD法进行隧道的开挖施工,并对CRD法施工技术进行探讨,为类似隧道工程施工积累参考经验。

The center cross-diaphragm(CRD) method is a common construction method in the weak stratum construction of tunnel.The utilization of CRD method to construct can effectively prevent the sinking and deformation of supporting structure,prevent the horizontal displacement of soil body and reduce the ground settlement.Taking Majiapo Tunnel as an example,the article analyzes the engineering geological situation of tunnel.According to the study,it is designed to use the CRD method for the excavation construction of tunnel.The article discusses the construction technology of CRD method,which can be referred for the construction of the similar tunnel projects.