摘要
四车道公路隧道由于跨度特大和断面扁平,加上施工期间各道工序的相互影响、围岩的多次扰动等诸多因素,导致施工过程中的动态施工力学行为极为复杂,围岩极易发生失稳乃至坍塌。利用“公路隧道结构与围岩综合实验系统(CTSSSRH)”和有限元分析程序,对四车道公路隧道在不同施工方法下的施工动态过程进行相似模型试验与数值模拟,研究四车道公路隧道围岩与结构位移、应力、应变及破坏区等的分布与发展规律,得到四车道公路隧道在不同施工方法下的动态施工力学特征,并提出合理的施工方法。
Due to the four-lane highway tunnel having super-span and flat-section,together with the influence of different processes and the multiple disturbance of surrounding rock in period of construction,the dynamic construction mechanics of tunnel is extremely complicated,the surrounding rock is very easy to lose stability and collapse occurs.By using the“CTSSSRH”and finite element analysis,physical model test and numerical simulation are carried out to research the distribution and the developing law of displacement,stress,strain and failure zone on surrounding rock and structure of the tunnel.The results that the settlement on crown is much greater than the horizontal displacements,o the settlement can be used as the index of surrounding rock stability.In addition,for the case of rock extrusion,the maximum principal stress of side wall is tensile stress,and the axial force of bolt is greater than other bolt.Some dynamic construction mechanics rules in varying construction method are obtained,and the reasonable construction method of four-lane highway tunnel is put forward.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z1期3057-3062,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
隧道工程
公路隧道
四车道
动态施工力学
模型试验
数值模拟
tunnelling engineering
highway tunnel
four-lane
dynamic construction mechanics
physical model test
numerical simulation
