›› 2010, Vol. 31 ›› Issue (8): 2435-2440.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Field pull-out test and behavior analysis of compression type rock anchor cables

LU Li 1,2, ZHANG Si-ping 1,2, ZHANG Yong-xing 1,2, HU Dai-wen 1,2, WU Shu-guang 1,2   

  1. 1. College of Civil Engineering, Chongqing University, Chongqing 400045, China； 2. Key Laboratory of New Technique for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China
  • Received:2009-09-15 Online:2010-08-10 Published:2010-08-30

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Abstract:

Behavior of compression type rock anchor cable in soft rock slope is studied by field test. Experimental anchor cables which have 130mm diameter holes and 6 steel strands are frequently used in anchorage of rock mass engineering. Various fixed anchor length and free anchor length are designed to find the whole loading-displacement relationship of test rock anchor cables. Strain sensors are put into cement paste to test the strain distribution curve of fixed anchor length. Test data coincide with theoretical results. The optimum fixed anchor length of experimental anchor cables is 2m. Ductility and residual strength of anchor cables are also excellent. Anchor cables still keep high bearing capacity when they have large displacement, which can also provide early failure warning. According to experimental strain data, stress transmission length become longer when bonded transmission length doing so. The failure of anchor cables has two stages of the partial plasticity and the whole plasticity.

Key words: compression type rock anchor cable, field test, mechanical behavior, fixed anchor length, strain.

CLC Number: 

  • TU 45
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