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| Dynamic and static mechanical characteristics and engineering application of a novel steel pipe shrinkable energy-absorbing cable |
| WU Xuezhen1，YE Qing1，DENG Tao1，ZHENG Hanfang1，WANG Gang2，JIANG Yujing1，3 |
| (1. College of Civil Engineering，Fuzhou University，Fuzhou，Fujian 350108，China；2. Shandong Provincial Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering，Shandong University of Science and Technology，Qingdao，Shandong 266590，China；3. Department of Engineering Research，Nagasaki University，Nagasaki 852–8521，Japan) |
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Abstract The problem of large deformation of surrounding rock induced by high stresses in the deep stratum poses a great challenge to engineering safety. The typical rock cable would be damaged readily due to its inability to react to the massive deformation of surrounding rock. A new type of steel pipe shrinkable energy-absorbing cable (SPS Cable) was developed based on the principle of steel pipe extrusion and deformation. The SPS Cable fully utilizes the plastic extrusion and deformation characteristics of metal materials and has the advantages of stable resistance，high controllability and good energy absorption effect. The new cable?s dynamic and static mechanical characteristics were investigated by cable tensile testing system and dynamic drop testing system. The test results show that：(1) the SPS Cable can provide a constant working resistance of 367 kN under static conditions，and the maximum allowable deformation can reach 694 mm；(2) When resisting impact loads，the SPS Cable has good energy absorption ability，the buffer force remains stable，and the maximum energy absorption in a single impact can reach 103 kJ. The results reveal that the SPS Cable can offer high support resistance while allowing large deformation. It is very easy to install，and does not interfere with site development. The SPS Cable provided a new solution to deep engineering?s large deformation problems.
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2023, Vol. 42 
