RESEARCH ON CREEP CHARACTERISTICS OF ROCK-LIKE MATERIALS UNDER FREEZE-THAW CYCLES

WU Yang; HE Qiangqiang; WANG Yongyan

doi:10.13204/j.gyjzG20010110

Volume 50 Issue 10

Jan. 2021

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WU Yang, HE Qiangqiang, WANG Yongyan. RESEARCH ON CREEP CHARACTERISTICS OF ROCK-LIKE MATERIALS UNDER FREEZE-THAW CYCLES[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(10): 106-110,62. doi: 10.13204/j.gyjzG20010110

Citation:

WU Yang, HE Qiangqiang, WANG Yongyan. RESEARCH ON CREEP CHARACTERISTICS OF ROCK-LIKE MATERIALS UNDER FREEZE-THAW CYCLES[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(10): 106-110,62. doi: 10.13204/j.gyjzG20010110

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RESEARCH ON CREEP CHARACTERISTICS OF ROCK-LIKE MATERIALS UNDER FREEZE-THAW CYCLES

doi: 10.13204/j.gyjzG20010110

1. Hotel Engineering Department, Qingdao Vocational and Technical College of Hotel Management, Qingdao 266100, China;
2. Department of Research and Development, Qingdao Junray Intelligent Instrument Co., Ltd., Qingdao 266108, China;
3. College of Mechanical and Electrical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China

Received Date: 2019-08-17

Abstract

Abstract

The creep model described rock materials under freeze-thaw cycles was established in the light of shale in tunnels of the western cold region. And the rock-like material specimens made of cement, sand and fly ash were cast, and after different freezing-thawing cycle tests, uniaxial creep tests were carried out. Finally, the creep characteristics of tunnel surrounding rock in cold regions were simulated by ABAQUS and obtained the stress failure law of "tunnel vault-sidewall-arch bottom". The results showed that:1) the creep model of Nishihara, temperature dampers and NVPB model could describe the creep characteristics of rock-like materials under freeze-thaw cycles; 2) the strain increased greatly with the increase of loads and time. The extent of damage was gradually increased and the deformation resistance was weakened with the increase of freeze-thaw cycles; 3) the maximum stress of tunnel surrounding rock in cold regions was mainly concentrated at the interface between the vault and sidewall, and between the bottom and sidewall.
- freeze-thaw cycle,
- rock-like material,
- creep model,
- creep test,
- numerical simulation

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References(19)

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