重庆大学学报：自然科学版2012，Vol.35Issue(12)：84-93,10.
新建立交隧道施工对既有隧道影响的模型试验
Model test of influence of excavating new interchange tunnel on existing tunnel
摘要
Abstract
In order to analyze the influence of construction of new interchange tunnel on existing tunnel,a three-dimension model test of interchange tunnel is carried out with the system of structure and surrounding rockmass of highway tunnel.Existing tunnel's surrounding rock pressure,internal displacement and supporting internal force are measured.The results show that,firstly,excavating new tunnel has obvious influence on section Ⅰ of existing tunnel,and has little influence on section Ⅱ.All surrounding rock pressure keeps decreasing and arch bottom surrounding rock's stability reduces.Secondly,crown and hance internal displacement manifest tensile deformation,and the deformation at crown is bigger than that at hance.Thirdly,exiting tunnel's supporting axial force keeps increasing and supporting moment keeps decreasing.Finally,excavating new interchange tunnel has obvious influence on exiting tunnel's surrounding rock pressure,internal displacement and supporting internal force when adjacent space is 0.25D,and it indicates that interchange tunnel's adjacent space should be no less than 0.5D.关键词
立交隧道/既有隧道/围岩压力/支护内力Key words
interchange tunnel/existing tunnel/surrounding rock pressure/supporting internal force分类
交通工程引用本文复制引用
刘新荣,王吉明,郭子红,林志,裴丽..新建立交隧道施工对既有隧道影响的模型试验[J].重庆大学学报：自然科学版,2012,35(12):84-93,10.基金项目
国家863计划项目 （）
国家自然科学基金创新群体基金 （）
