Research On The Mechanism Of Deformation And Control Of Surrounding Rock In Xuecheng Tunnel

With the rapid development of modern traffic, the building of tunnel engineering is more and more, today’s century is the world of underground engineering, emergence of deep tunnel, tunnel through high tress and soft rock will appear different degree of surrounding rock, so large deformation hazard problems of large deformation problems surrounding the prevention and treatment scheme is more important, this paper studies both at home and abroad based on the deformation tunnel rock deformation condition grew up to detail, from the tunnel rock conditions, support constraint, engineering environment, deformation, deformation mechanism, etc. the large deformation surrounding rock, define a detailed analysis of the large deformation of surrounding rock. Tunnel construction adopts advance geological forecast geologic condition, meanwhile, analysis of site monitoring data simulated simulation and the displacement back analysis, can predict the large deformation, construction process through monitoring measurement results, the engineering analogy, mathematical analysis, forecast big deformation. In the large deformation tunnel area vulnerable to USES short steps method excavation, anchor nets injection plus steel-frame combined support, and can meet the construction need numerical simulation, mimic their excavation and supporting, grasps the rock deformation and supporting bearing law, specify the weak parts, construction support when measured, and monitor the analysis parameters of surrounding rock, guiding numerical simulation analysis.This paper established a set of suitable for large deformation surrounding rock tunnel excavation of the control system, and the geological condition, the investigation before, the geological advanced prediction, the engineering analogy way, rock types, and numerical simulation, judge, providing appropriate large deformation of excavation method and corresponding supporting measures, construction process monitoring and surveying and data analysis, it is concluded that judge numerical simulation, optimization of surrounding rock parameters calculated parameters to close to actual engineering construction under the guidance of the steps. Based on the research, practice tunnel provides is feasible in technique and the economy proved reasonable. in similar engineering there are some certain reference value.