Rock bending creep and disturbance effects
The bending creep and its disturbance effects of red sandstone rock beam and oil shale rock beam were studied by adopting the self-developed gravitation level style rock creep test machine and bending creep test system, and the constitutive equations were established. It is found that fracture morphology of rock beams under no disturbance load is regular, cracking position of fractures is on part of loading concentration, the crack starts from a neutral plane. However, fracture morphology of rock beams under disturbance load is irregular, cracking position of fractures deviates from a neutral plane. Delayed instability of rock beam occurs for some time under constant disturbance load. When disturbance load is beyond a certain range, suddenly instability of occurs rock beam in a certain time. The results show that there is a guiding significance for creep stability in the geotechnical engineering fields.
rock beam bending creep disturbance load gravity delayed instability
FU Zhi-liang(付志亮) ZHENG Ying ren(郑颖人) LIU Yuan-xue(刘元雪)
Key Laboratory of Ministry of Education Co-sponsored by Province and Ministry Laboratory of Safety a Department of Architectural Engineering, Logistical Engineering University, Chongqing 400041, China
国际会议
长沙
英文
438-442
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）