【摘要】：為了解決極高地應(yīng)力軟巖隧道大變形控制難題,以蘭渝鐵路木寨嶺隧道嶺脊核心段施工為例,通過現(xiàn)場試驗(yàn)和數(shù)據(jù)分析,得到如下主要結(jié)論:1)提出了"先放后抗,抗放結(jié)合,錨固加強(qiáng)"的變形控制理念;2)得出了該隧道嶺脊核心段"超前導(dǎo)洞應(yīng)力釋放+圓形4層支護(hù)結(jié)構(gòu)+徑向注漿+長錨桿+長錨索"綜合變形控制方案;3)超前導(dǎo)洞應(yīng)力釋放效果明顯,正洞累計(jì)變形減小幅度約為34%;4)得到了圓形多層支護(hù)結(jié)構(gòu)變形規(guī)律;5)累計(jì)變形均控制在設(shè)計(jì)預(yù)留變形量內(nèi),保證了該隧道嶺脊核心段大變形控制效果。
[Abstract]:In order to solve the problem of large deformation control of extremely high ground stress soft rock tunnel, taking the construction of the core section of Muzhailing tunnel of Lanyu railway as an example, through field test and data analysis, the main conclusions are as follows: 1) put forward "release first and then resist." The deformation control concept of anti-release combination and anchoring strengthening; 2) the comprehensive deformation control scheme of "leading guide tunnel stress release circular four-story supporting structure with long bolt and long anchor cable" is obtained. 3) the stress release effect of the leading guide tunnel is obvious, and the cumulative deformation of the positive tunnel is reduced by about 34% 鈮，

本文編號(hào)：2480698