according to the characteristics of engineering geology and supporting design in weak rock tunnel is simulated, in this paper, the influence of system anchoring bolt during construction of large cross-section tunnel in weak rock by three-dimension finite element analysis 摘要結(jié)合軟弱圍巖隧道工程地質(zhì)和支護(hù)設(shè)計(jì)特點(diǎn),應(yīng)用三維數(shù)值方法模擬研究了軟弱圍巖隧道系統(tǒng)錨桿在一次支護(hù)中的作用效果。
the result shows that system anchoring bolt not only reduces the internal force of primary support and secondary support, hence improves safety of the supporting structure; but also effectively restricts relaxation of surrounding rock, reinforces the surrounding rock, improves safety of the construction 研究結(jié)果表明,系統(tǒng)錨桿不僅可以大大降低一次支護(hù)和二次支護(hù)結(jié)構(gòu)的內(nèi)力,提高結(jié)構(gòu)的安全度,而且可以有效抑止隧道周邊圍巖的應(yīng)力松弛,改善周邊圍巖的受力特性,提高施工的安全性。