摘要
以一种新兴的地铁暗挖施工方法——PBA工法为研究对象,利用适合模拟地下工程开挖全过程的FLAC软件,采用数值计算的方法,结合具体实例对PBA工法的施工过程进行了详细的计算,得到了PBA工法施工过程中土体的扰动情况、车站结构的内力转换和变化情况以及开挖完成后车站结构的位移,对PBA工法的力学特性进行了探讨,得到了以下结论:(1)PBA工法施工全过程中,站厅层(地下一层)的开挖应该得到足够重视;(2)PBA工法形成的结构顶拱受力较大,应予以重视。这些规律可以为地铁的设计与施工提供参考。
Based on numerical computing of constructing process of metro station using FLAC-a program for simulating the whole procedure of underground engineering, a new excavation job pmctice-PBA method of metro station construction is studied in this paper. Then, the laws of strata disturbing induced by excavation using PBA, transitions and changes of internal forces in metro station structures and displacements of metro station structures after the construction procedure are studied and some conclusions are drawn： （ 1 ） the excavation of upper layer by PBA method should be emphasized; （ 2 ） the capability of load - bearing of arch should be emphasized. These conclusions can provide references for design and construction of metro.
出处
《地下空间与工程学报》
CSCD
2007年第5期928-932,共5页
Chinese Journal of Underground Space and Engineering
关键词
地铁
PBA工法
数值模拟
metro station
PBA
numerical simulation
FLAC
