地震作用下非贯通节理岩体斜坡破坏的物理模型试验研究

Physical Model Test of Rocky Slope Failure Containing Intermittent Joints under Earthquake Action

地震作用下高斜坡破坏的发生发展过程比较短暂、剧烈,破坏机理相对复杂。本文采用模型试验的方法来研究地震作用下非贯通节理岩体斜坡的反应。试验结果表明:节理上的应变最大,模型上部应变大于下部应变;节理贯通机理复杂,多为拉剪复合型破坏;节理的贯通并不意味着斜坡的破坏,而是破坏了斜坡的整体性,使其处于临界状态。试验揭示了此类斜坡在地震作用下的动力响应及破坏机理,可为理论和工程实践应用提供有益的参考和指导。

In general the failure development process of high slope under seismic action is very short and intense, the failure mechanism is relatively complex. In this paper, a model test is adopted to study the response of intermittent joints rock slope under seismic load. The results in dicate that the maximum strain is on the joints, the strain on upper part of the model is larger than the lower part. The coalescence mechanisms is complex, mostly are tensileshear mixed fail ure. The coalescence of joints didn＇t imply the destruction of the slope, but destroy the integrity of the slope, and made it in the critical condition. The physical test reveals the response and fail ure mechanism of this type slope under the earthquake action＇, it will provide a useful reference and guide for theory application and engineering practice.