Analysis And Research Of The NATM Construction Monitoring For Banzhulin Tunnel

With the rapid development of national traffic construction and increasing number of highway tunnels, more and more geologic problems have been met with in tunnel construction. As an important method of safety insuring , design optimizing, construction instructing, progress of monitoring and measuring technique is a matter of great significance for tunnel construction in bad geologic area. On the basis of former research of highway tunnel monitoring technique and theory, this thesis gives a systematic description of construction monitoring design, monitoring content, actualizing method data process and information feedback combining with Chongqing Province Banzhulin free-way tunnel monitoring and measuring project. Main conclusions are as follows:1. Monitoring project principle has been established, combining with difficulty and importance,ordinarily and accurate, selective and compelled of monitoring and measuring. Different monitoring projects have been put forward according to different construction environment.2.according to Banzhulin tunnel on Yu-Xiang Expressway in Chongqing city, this paper summarizesâ…£&â…¤level typical section surrounding rock's deformation property & the stress condition of support lining, Obtains time effect and spatial effects of surrounding rock's deformation & the pressure of surrounding rock, the axial force of steel support.3. The excavating and supporting plan is whether reasonable or not is feed backed by settlement of arch crown and convergence measure.4.According to the numerical simulation of characters of repress-entative excavating and supporting, internal force of preliminary support , deformation of cavern, progressing of excavating settlement of arch crown is studied. The excavating and supporting plan is reasonable from the result of the data processing.According to using of the monitoring and measuring technique & information feedback, the safety of the tunneling construction can be insured by tech support and academic certify. Also,credible technical bases can be given for the optimizing and designing of the tunnel parameter which has designed.