铁道标准设计2017，Vol.61Issue(2)：89-94,95,7.DOI:10.13238/j.issn.1004-2954.2017.02.020
盾构隧道穿越上软下硬地层施工力学特性分析
Construction Mechanical Property Analysis of Shield Tunnel through Upper-soft and Lower-hard Stratum
何祥凡 1申兴柱 1王帆 1姚佳兵1
作者信息
- 1. 西南交通大学交通隧道工程教育部重点实验室，成都 610031
- 折叠
摘要
Abstract
The poor shield tunneling posture and ground surface collapsing are usually caused by the upper-soft and lower-hard composite stratum in the shield construction, which may lead to partial damage of the segment in some serious cases. Based on the shield tunnel engineering through upper-soft and lower-hard stratum in Shenzhen Metro Line7 Project, a numerical simulation method is used to study the mechanical characteristics of shield construction of the tunnel through upper-soft and lower-hard stratum ( including the section “from soft into hard” and the section “from hard into soft”) . The analysis of the change rule of the ground surface settlement, and the segments’ vault settlement and stress concludes that the surface subsidence increases significantly ( maximum increment up to 1 cm) , and the uneven segment vault settlement is getting more serious during the construction of shield tunneling through upper-soft and lower-hard composite stratum. The results also show that suitable reinforcement in the softer side stratum can effectively reduce surface subsidence and segment vault settlement in the section of upper-soft and lower-hard stratum, and lower the stress level of the segment in the section “from soft into hard”.关键词
盾构隧道/上软下硬地层/施工力学特性/地层加固Key words
Shield tunnel/Upper-soft and lower-hard stratum/Construction mechanical property/Stratum reinforcement分类
交通工程引用本文复制引用
何祥凡,申兴柱,王帆,姚佳兵..盾构隧道穿越上软下硬地层施工力学特性分析[J].铁道标准设计,2017,61(2):89-94,95,7.
