隧道施工由CRD改为CD工法衬砌结构内力及变位分析

在隧道施工中地质较差地段施工工法一般都会采用CRD工法,采用CRD工法进行施工虽然能比较安全的掘进,但其各部施工相互干扰很大,在工期要求很紧的情况下,CRD工法很难取得满意的进尺.在对前面围岩有了进一步的认识后,改变工法,对于施工进度要求是非常有利的,本文以一特定隧道的围岩参数及衬砌参数对CRD工法下和CD工法下的衬砌结构内力及变位进行了模拟分析,分析结果认为:在此特定隧道围岩条件下,将CRD工法改为CD工法,其结构内力和变形在结构的承载能力之内,以期能为施工提供参考.

THE ANALYSIS OF LINING STRESS AND STRAIN WITH WORKING METHOD FROM CRD TO CD METHOD

there are always use the CRD method to excavate the tunnel when the geology is poor, although the tunnel is excavated in good condition with the CRD method, the work will be interference in each subsection, when the work time is not enough, CRD method is hare to meet the require. With the knowing on front wall rock, the Excavation Method can turn to other available method. The lining stress and strain with working method from CRD to CD method are simulated, the result show that the Excavation Method can turn from CRD to CD method.