铁道标准设计2016，Vol.60Issue(4)：72-77,6.DOI:10.13238/j.issn.1004-2954.2016.04.018
基于流固耦合理论下穿库区隧道围岩稳定性分析
Analysis of Surrounding Rock Stability of Tunnel Passing under Reservoir Based on Coupled Fluid-solid Theory
陈明奎1
作者信息
- 1. 北京市市政工程设计研究总院有限公司，北京 100082
- 折叠
摘要
Abstract
Based on a certain railway tunnel passing under a reservoir, a systematic study is conducted to identify the stability of the surrounding rocks of the tunnel which goes through the reservoir area, to compare and analyze the change law of the tunnel structure stress, the displacement and plastic zone of the surrounding rocks, the influence of the thickness of reinforcement ring and seepage coefficient on the stability of the surrounding rocks. The results indicate that the seepage field of the underground water has significant influence on the deformation of the surrounding rocks, it not only causes a large scale of settlement of the bottom of the reservoir but also increases the displacement of the vault and haunch; it reduces the uplift of the inverted arch and extends the range of surrounding rocks. The excavation of the tunnel obviously disturbs the distribution of pore water pressure of groundwater, the seepage velocity is fastest at the two arch foot and the most severe plastic zone is located at the lateral temporary support. The grouting reinforcement ring can improve the stress state of the surrounding rocks and the optimal thickness of the grouting reinforcement ring is 5 meters. The reinforcement effect is not obvious when the permeability coefficient of the grouting reinforcement ring is less than 1/50 of the surrounding rocks.关键词
铁路隧道/流固耦合理论/围岩稳定性/渗流场/库区Key words
Railway tunnel/Coupled fluid-solid theory/Stability of surrounding rock/Seepage field/Reservoir area分类
交通工程引用本文复制引用
陈明奎..基于流固耦合理论下穿库区隧道围岩稳定性分析[J].铁道标准设计,2016,60(4):72-77,6.
