Field Test Study on Large Deformation Control and Reasonable Support Form of Highway Tunnel
In order to solve the problem of insufficient control of tunnel deformation,this paper uses the method of advanced support of the face to carry out the test of advanced drilling section and advanced guide section to determine the best support scheme.The results show that,com-pared with the comparison section,the horizontal convergence in the stability stage of the advanced drilling section is reduced by 29.5%,the arch settlement is reduced by 72.6%,the steel frame stress at the right arch waistline is reduced by 17.8%,and the surrounding rock stress is reduced by 40.1%.The horizontal convergence of the leading tunnel section is reduced by 34.2%,the settlement of the arch roof is re-duced by 82.3%,the stress of the steel frame at the right arch waist is reduced by 34.6%,and the stress of the tunnel surrounding rock is re-duced by 72.7%.According to all the monitoring values,the deformation control effect and bearing performance control effect of tunnel under the advance guide tunnel support scheme are the best,so this project is suitable to use the support scheme in the advance guide tunnel scheme to control the deformation control of highway tunnel.
国家科技期刊平台
NSTL
万方数据
