摘要
以重庆两江隧道为研究背景,采用公路隧道结构与围岩综合实验系统对交错隧道进行三维物理模型实验,分析新建隧道施工力学特性,并采用数值模拟对模型实验区域进行对比分析。研究表明:新建隧道左侧周边位移普遍大于右侧周边位移;左侧周边位移大于独立隧道单侧周边位移;右侧周边位移小于独立隧道单侧周边位移;得出不同近接间距下周边收敛和拱顶下沉随隧道开挖的发展趋势;模型实验获得的拱顶下沉和周边收敛归一化后得出位移随近接间距的变化规律。数值模拟获得的周边收敛和拱顶沉降与还原后模型实验结果相接近,表明模型实验结果与数值计算结果一致。
This paper takes Chongqing Two-River Tunnel as the research background,based on the system for structure and surrounding rockmass of the highway tunnel,conducts a three-dimension model test about forked tunnel with different altitude to study new tunnel＇s mechanics behavior induced by construction,and uses numerical simulation to analyze model domain. The results show that the displacement on new tunnel＇s left hance is larger than the displacement on its right hance. Left hance displacement is larger than hance displacement of the single tunnel,and the right hance displacement is less than hance displacement of the single tunnel. The trend of hance displacement and crown settlement with different adjacent spacing is got. Normalizing hance displacement and crown settlement of model test,the relation between displacement and adjacent spacing is disclosed. The hance displacement and crown settlement gained by numerical simulation is close to the converted result of model test,which indicates that the model test data is consistent with the result of numerical simulation.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第12期54-59,共6页
Journal of Chongqing University
基金
国家863计划资助项目(2007AA11Z110)
国家自然科学基金创新群体基金资助项目(50621403)
重庆市建委基金资助项目(城科字2006第34号)
关键词
交错隧道
模型实验
新建隧道
力学特性
forked tunnel with different altitude
model test
new tunnel
mechanical behavior
