Tweet Share

• Send by email

  Send by email

  

  Large deformation mechanism of lining through actual data and model experiment

  Tunnel structure may be largely deformed or collapsed by larger force than expected in design. Big earthquake occurred in Japan and the collapse of permanent lining and the destruction of temporary lining such as fracture of steel arched support in road tunnels have been reported several times for over 20 years. Some mountain tunnels also encountered extreme squeezing and swelling geological condition and the large heaving of inverted arch structure occurred in both construction and operational stages. These cases led to the decrease of loadbearing capacity of structure. To propose the proper structure and show the methodology of design, the example of damage by earthquake in Japan was introduced and the model test with simple material was proposed to reproduce the phenomenon in this paper. Some tests were done to grasp the collapse mechanism and the fracture mode of lining was confirmed. The influence of different specification of inverted arch structure such as radius and thickness was clarified and the relative increase of stiffness for whole tunnel structure was proposed without avoiding the partial weak stiffness of lining through the tests.

  Recipient :

  Name ^* :

  E-mail address ^* :

  ^* Required fields

  Send   or  Cancel

• Print