Research On Early Warning And Forecasting System Of Tunnel Collapse And Control Measures

As the development of China, more and more investment is ploughed into the foundation construction. The transport tunnel project, as an important part of the field, has been paid more attention and get a wide range of applications. A large number of highway tunnels and railway tunnels are constructed, and the safety of the tunnel project will become a concern of the civil engineer.However, in the course of building tunnels, collapse is the most common one of the security incidents. Once the project has collapsed, it not only delays period, significantly increase the project cost, but also lead to the personal injury or even life-threatening of construction workers and technical staff. If these accidents were not handled properly, it will cause the hidden dangers and infect the maintenance and conservation work. And thus, the problem of how to carry out the tunnel collapse early warning and forecasting system, in order to ensure the safety of construction, is very important.Relying on the Jiangxi Provincial Communications Department research paper "Research on Early Warning and Forecasting System of Tunnel collapse and Control Measures", the paper summarizes the style and causation of tunnel collapse.And with the engineering examples and model experimental means, the paper studies the characteristics of tunnel cave-deformation, and gets some laws of the deformation and stress changes with the passage of time.Based on a large number of monitoring data, four destroyed stages of tunnel collapse are suggested, they are uniform deformation phase, stable development phase, accelerated phase and destruction mutation phase. And the paper also discusses the main control measures in every phase.This paper also studies the warning indicators of tunnel collapse, and establishes an proposed standard for rock of gradeâ…¢,â…£,â…¤on early warning and forecasting system of tunnel collapse.