The Analyse Of The Causes Of Lining Breach And The Strengthening Methods For The Xiaomansahe Highway Tunnel

This dissertation discusses the manner of rock-mass and lining stress, the design of tunnel, the check and measure of tunnel and the strengthening methods of tunnel roundly on the base of the Xiaomansahe highway tunnel's reinforcement of Yun Nan province, by this way it gains the judgments system for the cause of tunnel breach and the strengthening effect and the strengthening design for the tunnel. In order to reach the basic object of tunnel reinforcement, this dissertation discusses the mechanics manner of tunnel lining, and in the process of study this dissertation analyses the situation of lining breach detailedly and collect a lot of data. Meanwhile this dissertation probes into the causes of tunnel breach and its breach trend, and conclude the harms of lining breach by use of makeup materials of geological CT, check and measure data of tunnel construction and Ansys simulations of tunnel excavation. Aiming at the tunnel's actual situation of lining breach, this dissertation makes out the corresponding strengthening methods and puts forward the corresponding judgments criterion of reinforcement effect. Through this project's practice of the tunnel's reinforcement, this paper deduces the mathematics model of tunnel lining's reinforcement by Increasing Section Area. In the course of study, this dissertation also has some talks in the part of construction craft of civil engineering reinforcement for its uniqueness and its special attribute. Through the practice of Xiaomansahe tunnel's strengthening construction, it obtains some academic results and some practical engineering conclusions. After Xiaomansahe tunnel's reinforcement, the studying make out lots of check and measure, which prove this strengthening method feasible, so does the checking computations.With the development of Highway in our country, the number of mountain tunnel will be more and more. But all kinds of bad phenomena in the tunnel are shown, such as tunnel lining breach and leakage of water, which bring a lot of hidden trouble to tunnel's construction and tunnel's business. To take precautions against these troubles, the corresponding repair schemes for tunnel breach should be advanced at once. By the design and the construction for Xiaomansahe tunnel's reinforcement, we have gained some practical experiences of mountain tunnel's reinforcement, which has actual reference and actual value for the similar engineering.