Combined Effect of Load and Water Environment on Creep Behaviours of Red Sandstone

5th International Conference on Environmental Science and Civil Engineering

生态环境科学;土木建筑工程

Yu, Chaoyun^1 ; Tang, Chunan^1

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, LIAONING

116024, China^1

关键词: Cracks initiations;    Creep experiments;    Long term stability;    Long-term strength;    Mechanical behaviour;    Steady-state creep;    Water environments;    Water rock interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/283/1/012003/pdf
DOI  :  10.1088/1755-1315/283/1/012003

来源: IOP

【 摘 要 】

Creep experiment was conducted on specimens submerged in water to know the combined effect of load and water on mechanical behaviour of red sandstone. Compared with saturated and dry specimen with the sealed surface, results show that the steady-state creep strain rate of submerged specimen is the highest, whereas, the corresponding long-term strength is the smallest. Creep cracks initiation and propagation make it possible for water in the environment to migrate into the tip of new cracks, which intensifies the stress corrosion effect of water. This is the effect mechanism of a combined action of load and water on the creep behaviour of red sandstone. The presented experimental results are beneficial for monitoring and assessing the long-term stability and safety of rock engineering.