- 复杂环境下倾倒式危岩体的动力稳定性分析
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- 论文类型： 期刊论文
- 发表时间： 2022-06-29
- 发表刊物： 岩石力学与工程学报
- 所属单位： 建设工程学部
- 卷号： 35
- 期号： 10
- 页面范围： 1965-1974
- ISSN号： 1000-6915
- 摘要： One of the main geologic disasters,the avalanche of perilous rock has
important influence on the loss of lives and economic values. The
indirect effects of water in fissures on the dynamic stability are not
taken into account in Chinese specifications. Based on the assumptions
of solid and fluid mechanics,the coefficient of reflection and
transmission of the incident P waves at the interface of solid-liquid
was deduced and verified in terms of the energy conservation,and then
the hydrodynamic pressure acted on the perilous rock was calculated. The
influence of the elastic modulus,density and Poisson￠s ratio on the
dynamic stability coefficient was studied qualitatively according to the
expression of the transmission coefficient. The proposed method has been
extensively applied to analyze the stability of unstable toppling rocks
at Wanzhou district in Chongqing. The influence of the rainfall
intensity and ground motion intensity on the stability of perilous
toppling rock was discussed. The dynamic stability coefficient was
reduced considering the hydrodynamic pressure in fissures. The reduction
was more obvious in the case of rainstorm. It was concluded that the
hydrodynamic pressure should be taken into account for the stability
analysis of unstable rock in complicated surrounding conditions. - 备注： 新增回溯数据
