Model test study of shock absorption joint damping technology of crossing stick-slip fracture tunnel

作者：Cui Guangyao^*; Wang Mingnian; Yu Li; Lin Guojin

来源：Chinese Journal of Rock Mechanics and Engineering, 2013, 32(8): 1603-1609.

• Damping technology
• Large-scale model test
• Longitudinal strain
• Model tests
• Shock absorption
• Stick-slip movement
• Tunnelling engineering
• Wenchuan Earthquake

In order to study the tunnel shock absorption joint damping technology of crossing stick-slip fracture, the seismic damage of Longxi tunnel F8 stick-slip fracture section in Wenchuan earthquake is selected as the research background to conduct large-scale model test of normal faulting stick-slip movement. Firstly, the test scheme is introduced, including the similar design, the test facility and material, the test grouping, the testing scheme and test process. Then, the test data is analyzed, and the structural internal force, longitudinal strain and contact pressure of tunnel vault are mainly researched. The results show that the effect of stick-slip fracture movement on hanging wall is larger than that on footwall; the damping effect of primary lining setting shock absorption joint is not obvious; the damping effect of secondary lining setting shock absorption joint that spacing is 12 m is slightly better than 9 m. In consideration of economy and easy construction, the damping mode of secondary lining setting shock absorption joint (spacing is 12 m) is recommended. These results are significant to the damping technology of tunnel of crossing stick-slip fracture.

• 出版日期2013
• 单位西南交通大学