长江科学院院报2018，Vol.35Issue(5)：110-114,5.DOI:10.11988/ckyyb.20161266
冰水堆积物隧道松动土压力计算方法修正及应用
A Calculation Method for Loose Soil Pressure of Fluvioglacial Deposit Tunnels: Modification and Application
魏旭博 1石豫川 1顾新杰 2吉锋 1张振1
作者信息
- 1. 成都理工大学 地质灾害防治与地质环境保护国家重点实验室,成都 610059
- 2. 中国电建集团 华东勘测设计研究院有限公司,杭州 310014
- 折叠
摘要
Abstract
Due to the special mechanical properties of fluvioglacial deposits, traditional tunnel pressure calculation formula does not suit for fluvioglacial deposits tunnel. In view of this,a modified Terzaghi's loose soil pressure cal-culation formula suitable for fluvioglacial deposit tunnel is deduced. First of all the change rule of lateral pressure coefficient is derived by theoretical derivation, and then the stress distribution at different buried depths are com-pared by numerical simulation, and also the soil arching effect is analyzed. Furthermore, the modified formula is compared with the original Terzaghi's loose soil pressure formula and the formula in China's Railway Tunnel De-sign Standard. Results conclude that the tunnel pressure calculated by the Standard formula would be higher than actual value;whereas the modified Terzaghi's loose soil pressure formula could well reflect the actual pressure of fluvioglacial deposit tunnel.关键词
冰水堆积物/松动土压力/土拱效应/侧压力系数/深埋浅埋分界线Key words
fluvioglacial deposits/loose soil pressure/soil arching effect/lateral pressure coefficient/dividing line standard for deep-and-shallow-buried tunnels分类
交通工程引用本文复制引用
魏旭博,石豫川,顾新杰,吉锋,张振..冰水堆积物隧道松动土压力计算方法修正及应用[J].长江科学院院报,2018,35(5):110-114,5.
