›› 2012, Vol. 33 ›› Issue (10): 2991-2995.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of anti-explosion effects of tunnels with different forms of bolt bolster plates

MING Zhi-qing,GU Jin-cai,ZHANG Xiang-yang,CHEN An-min,XU Jing-mao,KONG Fu-li   

  1. The Third Scientific Research Institute of the Corps of Engineers, General Staff of PLA,Luoyang,Henan 471023,China
  • Received:2012-04-10 Online:2012-10-10 Published:2012-10-19

Abstract: To study the reinforcement effects of different forms of bolt bolster plates under explosion, two different plates, namely face plate and bowl-shaped plate are selected in the field explosion test. Macroscopic failure pattern, displacement characteristics of tunnel wall, relationship between vault displacement and proportion distance, and vault displacements of both sides of explosion center are compared. Furthermore, reinforcement effects of the two plates on tunnels under the condition of explosion are analyzed. Test results show that bowl-shaped plate can bring tensile strength of bolt into full play; and stiffness of rock mass can be greatly improved. Reinforcement effect of bowl-shaped plate on rock are better than that of face plate.

Key words: explosion load, anchor bolt, bolster plate form, failure pattern, field test

CLC Number: 

  • TU 32
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