Defect Based On The Construction Of Highway Tunnel Structure Analysis And Disease Control Research

With the rapid development of China’s highway and road tunnel construction are increasing in number and size. But the current situation is not optimistic tunnel operators, a substantial proportion of the tunnel there are different degrees of disease problems. There are many causes of tunnel defects, disease problems due to lack of initial support in which the thickness of the lining of the cavity behind the two appear in the construction process, quality defects caused by more common. Diseases caused by defects in tunnel construction for long-term operational safety and tunnel after tunnel construction process completed constitute a great threat to the adverse effects caused to the road traffic, cause a lot of damage. Therefore, the tunnel disease caused by a construction defect and study the structure of the safety and stability, discuss its Treatment Measures have important theoretical and practical value.1. This status quo based on diseases of the tunnel, numerical simulation method to establish three-dimensional elastoplastic model to simulate highway tunnel grade Ⅳ surrounding rock excavation step method to analyze the dynamic displacement during excavation rock and lining structures and structural stress change security.2. Analog lining behind the existence of different directions, different sizes, different locations empty and initial support different levels of thinning the thickness of the tunnel structure stress and strain were analyzed for structural safety assessment of the failure mode analysis defect tunnel.3. The use of numerical simulation, the working conditions must Treatment backfill grouting reinforcement method, take two backfill opportunity, comparative analysis before and after effects of different empty backfill and backfill backfill opportunity tunnel structure.4. Summary Cause construction defects in construction, harm and manifestations, pointed advised against, inspection methods and defect remediation measures disease.Through the tunnel construction defect disease summary, the results of numerical simulation of the presence of diseases tunnel construction defect analysis, that the lack of lining thickness and the presence of a stable cavity lining behind a very negative impact on the safety of the surrounding rock and supporting structure, different positions, in different directions, different degree of influence on the size of the cavity structure is not the same. Treatment Measures backfill grouting is preferred both construction defects, to improve the stress state and stability of surrounding rock support structure have a significant effect, deal with construction defects should be done early detection and early treatment. Select remediation measures should secure a reasonable economy, for construction defects and diseases generated by the maintenance and reinforcement.