Study On Design And Engineering Reliability Of Tunnel Single Shell Lining

In the development of tunnel support technique, the single shell lining are a later one. Compare to the other type tunnel lining, It has special technology characteristic of itself. Composed of many reliable support techniques, it incarnates the newest study of rock mechanics and the underground engineering mechanics. At one time, because of the usage of many new type material, the support system is colligating the. excellence of other type tunnel line and getting more and more adjustable to all kinds of surround rock.There are three parts of the paper. In the first, it starts on thestability of surround rock, using practice data and theoretic analyse, explains the form and types of surround rock. Therefore the action mechanism and characteristic of single shell lining are discussed and the design method of single shell lining is stated. In the part of it, considering the doubts of the availability, the key technique problemsare discussed.In the second part of the paper, it offers an example of the single shell Lining. The station is in Chongqing Guanchangshan tunnel. The paper introduces the use condition of single shell lining. In this part, the surrounding pressure and the results of stress test are put together and analyzed. Those efforts are helpful to explore the action mechanism of single shell lining and can be use to design the single shell lining tunnel.In the last part, using the calculate method of reliability based on the model Of continuous medium, the paper study on the reliability of Chongqing Guanchangshan tunnel and gets corresponding results. The usage of the method enrichs the way of reliability study of single shell Lining tunnel.