工程地质学报2016，Vol.24Issue(4)：635-641,7.DOI:10.13544/j.cnki.jeg.2016.04.020
砂土地层浅埋暗挖隧道预加固技术研究
PRE-REINFORCED TECHNOLOGY FOR SHALLOW EXCAVATION TUNNEL IN SAND GROUND
摘要
Abstract
This article is based on the project of Guan-Hui inter-city rail transit.It uses field experiment, laboratory model experiments and numerical simulation method and develops a pre-reinforced technology for shallow excavation tunnel crossing sand ground.In analysis of the deformation of surrounding rock and supporting system suitable pre-reinforced method,scope and parameters can be obtained.The conclusions are as follows:Curtain grouting in tunnel and surface grouting are difficult to form waterproof curtain.When crossing sand strata,horizontal jet grouting and tunnel face grouting are the best pre-reinforcement scheme.Increasing grouting range is disadvantageous to control vault subsidence and horizontal convergence in sand strata,but can strengthen the integrity of the surrounding rock in unsand strata.Meanwhile,it is favourable to control the subsidence of ground. Changing the reinforced area parameter is highly advantageous to control the settlement of tunnel vault in sand strata.The better grouting quality accomplished,the greater the self-supporting capability of surrounding rock improved,while the horizontal displacement is nearly unchanged.关键词
砂土地层/浅埋暗挖隧道/预加固技术/室内模型试验/现场试验Key words
Sand strata/Shallow excavation tunnel/Pre-reinforced technology/Laboratory model experiments/Field test分类
交通工程引用本文复制引用
汪波,李铮,张哲,莫晨聪,杨意..砂土地层浅埋暗挖隧道预加固技术研究[J].工程地质学报,2016,24(4):635-641,7.基金项目
国家自然科学基金(51378434,51578456),广东省交通运输厅科技项目(2012－02－032)资助． （51378434,51578456）
