›› 2011, Vol. 32 ›› Issue (9): 2759-2764.

• Geotechnical Engineering • Previous Articles     Next Articles

Layered interval excavation method for large span and high sidewall underground cavern

LIU Bao-guo1，XU Gan-cheng2   

  1. 1. School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China; 2. The Air Force Engineering Design and Research Institute, Beijing 100068, China
  • Received:2011-03-30 Online:2011-09-10 Published:2011-09-13

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Abstract: The layered interval excavation method for a large span and high sidewall underground cavern is described in detail. Through numerical simulation, its feasibility is proved. A large span and high sidewall cavern construction practice is as follows; detailed large cavern reserved rock clapboard, upper, middle and bottom chamber between rock clapboard parallel excavation, and finally clear the rock clapboard full of this new method of construction of the excavation process. Through numerical simulation, the largest deformation caused by excavation, distribution of plastic zone and tension of rock bolting of two excavation methods are compared. The results show that the new method of rock excavation damage to surrounding rock is small. Finally, the applicable conditions for this new method are pointed. This method has universal significance for similar conditions of underground large cavern construction.

Key words: large section cavern, excavation methods, parallel operation, surrounding rock mass deformation

CLC Number: 

  • TU 45
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