Study On Deformation Mechanism And Management Of Outlet Bias Section Of Yakang Expressway Tianhe Tunnel

In engineering construction,tunnel is an effective way to pass through mountains.Because the tunnel opening bias is often encountered on the route of the design planning,the safety of the tunnel determines the construction safety and engineering quality.It is also a difficult problem for the technician.This is also a challenge for the technicians.Reasonable treatment will ensure construction safety and construction progress,and will not induce landslides,collapse and other geological disasters at the entrance.This article takes the Yakang Expressway Tianhe Tunnel as the engineering support,and briefly introduces the project overview and engineering geological conditions of the Tianhe Tunnel.According to the site investigation,the engineering geological survey report and construction conditions of the Tianhe Tunnel were collected.Based on the field monitoring measurement data,the cause of the disease in the Tianhe tunnel was analyzed and studied.The finite element software was used to simulate the tunnel construction process.The main contents are as follows:1.The monitoring of the unbalanced section of the Tianhe tunnel was carried out to obtain the horizontal convergence of the tunnel,the subsidence of the dome,the displacement of the surface,and the deep displacement.The tunnel data was analyzed and analyzed based on the data.2.Based on the geological conditions and monitoring data of tianhe tunnel,the subsection of the tunnel was divided and the mechanism of deformation was analyzed.3.Using finite element software FLAC3 D to establish the 3d geological model of the partial pressure section of tianhe tunnel,and simulate the influence of the control measures on the stability of the tunnel surrounding rock and the outer slope of the tunnel.In addition,the rationality of the control engineering measures is verified by comparing the displacement of the tunnel surrounding rock,the outer surface of the tunnel and the structure of the supporting structure and the magnitude of the stress and strain.4.Combining with the damage condition of tianhe tunnel,the reasonable governance measures are put forward.Finally,this paper summarizes the potential hazards of tunnel engineering,and puts forward the prevention and control measures and engineering proposals in the tunnel survey,design,construction and use.