Field Testing And Numerical Analysis On Full Displacement Of The Shallow In Grade V Rock Of A Latan Ttunnel

In the process of tunnel excavation, it is very important for the safety of the tunnelconstruction measuring to monitor the deformation of surrounding rock. At present, thedeformation of tunnel surrounding rock displacement monitoring measurement of tunnel faceof surrounding rock after excavation, resulting in the deformation of surrounding rock ofinformation collection is not complete, there is loss of soft surrounding rock displacementespecially should not be neglected. Currently, monitoring and measurement of tunnelsurrounding rock displacement of the tunnel face general deformation measurements rockexcavation, rock deformation caused by the collection of information is incomplete, that thereis a certain loss of displacement particularly weak rock but can not be ignored. This articlerelies on A La tan monitoring and measuring of tunnel, excavation process of shallow buriedtunnel exit was monitoring vertical displacement of ground surface and surrounding rock, andbased on this three-dimensional simulation of the deformation of surrounding rock in tunnelexcavation process, got A La tan tunnel surrounding V rock displacement variation ofshallow-buried exit section. The main research contents are as follows:1. A Latan tunnel based on field testing has been in the process of construction, surfaceand vertical displacement of surrounding rock and analysis of ground surface and surroundingrock in the excavation of the tunnel vertical displacement variation2. The use of finite element software MIDAS GTS to achieve a three-dimensionalnumerical simulation of the whole process of tunnel excavation. And the numerical resultswith the measured surface, the whole vertical displacement of rock were compared, analyzedthe results and the actual results of the calculation and the reasons for the differences3. Numerical simulation of three-dimensional tunneling through the whole process, withfull analysis of surface subsidence displacement V-class construction process variationshallow cave rock rock surrounding the tunnel segments at different depths; and studied therock tunnel construction process distribution, and the causes of the size of the range.Through research on surrounding rock displacement, tunnel-like design and safe constructionprovides a frame of reference...