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Volume 36 Issue zk2
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ZHANG Ming-ju, ZHAO Hong-chao. Experimental study on mechanical properties of hoop-disconnectable coupling in internal support system of excavation engineering[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk2): 418-423. DOI: 10.11779/CJGE2014S2073
Citation: ZHANG Ming-ju, ZHAO Hong-chao. Experimental study on mechanical properties of hoop-disconnectable coupling in internal support system of excavation engineering[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk2): 418-423. DOI: 10.11779/CJGE2014S2073
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Experimental study on mechanical properties of hoop-disconnectable coupling in internal support system of excavation engineering

  • The Key Laboratory of Urban Security and Disaster Engineering (Beijing University of Technology), Ministry of Education, Beijing 100124, China

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  • Received Date: July 27, 2014
  • Published Date: July 27, 2014
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    • Abstract
  • In order to improve the force way of the traditional disconnectable coupling in excavation engineering to further increase its security and stability, the design and development about the new hoop-disconnectable coupling are performed. Through axial compression tests, the mechanical properties of different specimens are studied. The main conclusions are drawn as follows: (1) the stiffness of the hoop-disconnectable coupling is higher than that of the traditional one; (2) under in the same load, the displacement of the traditional is larger; (3) under normal operation, the specimens can be reused; (4) when the ultimate bearing capacity is reached, the hoop-disconnectable coupling exhibits tiny brittle failure and after slipping, and it can continue to carry; (5) due to the clamping action of the bottom bolts, when the adjustable length is short, namely the larger contact area, the carrying capacity instead decreases; (6) under the axial compression, the pretension of bolts is essentially unchanged.
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    • References (11)
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