›› 2011, Vol. 32 ›› Issue (10): 3019-3025.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Comparative test study of blast-resistance performance of optimal composite anchorage structure and single anchorage structure

ZHAO Lin1, 3, ZENG Xian-ming2, LI Shi-min2, LIN Da-lu2, LU Wei-guo2   

  1. 1. College of Civil Engineering, Hunan University, Changsha 410082, China; 2. The Third Engineer Scientific Research Institute of the Headquarters of the General Staff, Luoyang, Henan 471023, China; 3. College of Civil Engineering and Architecture, Henan University of Science and Technology, Luoyang, Henan 471004, China
  • Received:2011-05-03 Online:2011-10-10 Published:2011-10-13

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Abstract: The optimal composite anchorage structure is constituted by soil nail and groups of fixed-length empty holes that regular setting in the end of soil nail. Empty holes caused a weakened zone in the surrounding rock. The weakened zone is between the reinforced support structure and the surround rock. It changes the original two-medium system into three-medium system. Under the explosion condition, weakened zone is firstly deformed, cracked, crushed or densified; and at the same time, a great deal of blast energy is absorbed. Therefore, the crisis of the reinforced support structure is transferred into the weakened zone. The optimal composite anchorage structure has excellent blast-resistance. The test results of the compression test of optimal composite anchorage structure and single anchorage structure show that the particle acceleration of single anchorage structure is 2.22 times higher than that of the optimal composite anchorage structure. The dynamic strain of the former is 5.30-4.50 times higher than that of the latter. The blast-resistance of the optimal composite anchorage structure is 5.10 times higher than that of the single anchorage structure. Under the limit damage condition, the former is 4.13-3.40 times higher than that of the latter

Key words: optimal composite anchorage structure, single anchorage structure, blast-resistance, comparative study

CLC Number: 

  • TU 942
[1] ZHAO Lin , ZENG Xian-ming , LI Shi-min , LIN Da-lu , LU Wei-guo　　. Comparative test study of blast-resistance performance of optimal composite anchorage structures and non-optimal composite anchorage structures [J]. , 2011, 32(S2): 76-82.
[2] CHEN An-min，GU Jin-cai，XU Jing-mao，KONG Fu-li，MING Zhi-qing. Model test study of tunnel mechanical characteristics under plane charge explosion [J]. , 2011, 32(9): 2603-2608.
[3] YANG Jian-min. Experimental research on consolidation of deep soft foundations [J]. , 2008, 29(7): 1981-1986.
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