铁道标准设计2017，Vol.61Issue(1)：65-70,71,7.DOI:10.13238/j.issn.1004-2954.2017.01.014
冰水堆积体隧道施工过程变形与受力分析
Analysis of Deformation and Stress during Outwash Accumulation Tunnel Construction
摘要
Abstract
In order to identify the deformation of surrounding rock and the behavior of supporting system during outwash accumulation tunnel construction, experimental tests and engineering characteristic analysis of physical and mechanical parameters and field tests are conducted to examine the variation laws of the surface subsidence and deformation around the tunnel with outwash accumulation, the axis forces of anchors, the contact pressure between the wall rock and primary bracing, and the internal forces in arch frames during construction period with reference to the under-construction Que’er Shan tunnel on 317 national highway. The results show that (1) the particle size is disparity and farraginous, the surrounding rock’s variation is drastic and vertically, it is mainly divided into the layer containing sand gravel with ice water product and the layer with ice boulder gravels;(2) the composition and distribution of surrounding rock in horizontal are the principal influence factors for the axial force of anchors, the contact pressure change and distribution between surrounding rock and primary bracing; ( 3 ) the three-step core-soil method is safe and controllable for outwash accumulation tunnel construction.关键词
隧道工程/冰水堆积体/物理力学参数/三台阶预留核心土法/现场测试Key words
Tunnel engineering/Outwash accumulation/Physical and mechanical parameters/Three-step core-soil method/Field tests分类
交通工程引用本文复制引用
严健,何川,李栋林,姚志军..冰水堆积体隧道施工过程变形与受力分析[J].铁道标准设计,2017,61(1):65-70,71,7.基金项目
国家自然科学基金(U1134208,U1361210) （U1134208,U1361210）
国家科技支撑计划课题(2013BAB10B04) （2013BAB10B04）
国家自然科学基金(51378434) （51378434）
