Key Technology Of Highway Tunnel Construction Safety

The past two decades, construction of highway develops very rapidly. Highway tunnelas an essential part of highway route,developments simultaneously with highwayconstruction. Grew up a lot of road tunnel and the construction of the tunnel, which canshorten the running distance, also increases the speed increase, the development of localeconomy, achieved good social and economic benefit. However, due to tunnel engineeringcharacteristics of geological complexity, the small space of workplace, unpredictable factors,many harmful factors intertwined, its construction accident rate is much more serious than theother works.This article is in the background of Zhang Zhuo highway tunnels,in-depth investigatesthe domestic tunnel construction practice,learns from foreign experience, sums up the majorfactor in accidents and construction safety measures Through to the east horse area tunnel,west and south area tunnel valley Ⅴ level of surrounding rock of shallow buried tunnelconstruction process numerical simulation, study the tunnel construction method,construction sequence and construction of cloth from the influence on surrounding rocksupporting or lining, in order to determine the rationality of the method, used to guide theconstruction. Analysis shows that with the increase of the stone subgrade modulus,interlaminar shear stress, tensile stress are increases, but the magnitude of increase is small,the deflection is reduced, and the the magnitude of reduce is large. Through analysis ofmonitoring measurement data, combined with the existing tunnel collapse monitoring andearly warning achievements in China and abroad, summarizes existing domestic tunnelcavern stability control indicator species, and combined with Zhang Zhuo highway tunnels,the project has developed an early warning suggested standards.