三峡地区岩质边坡滑动面裂隙水力劈裂分析

Hydraulic splitting analysis of rock slope sliding surface fracture in Three Gorges Area

由于岩质边坡滑坡产生的危害较为巨大,对岩质边坡滑坡启动机理的研究对边坡治理工程具有重要意义。本文根据断裂力学理论,对三峡地区岩质边坡滑动面的水力劈裂作用进行研究。研究成果表明,岩质边坡在一定的水头作用下会发生水力劈裂,水力劈裂使岩质边坡滑动面内的裂隙发生扩张和贯通,使得边坡渗透性增加,渗流速度加快,促使形成新软弱破裂面,如此循环,最终导致边坡岩体发生滑坡破坏。本文所推导出的临界水头公式,通过实际案例的验证,具有一定的参考价值,但是需通过实验和理论进行一定的修正。

Because of the great harm of rock slope landslide,the study on the starting mechanism of rock slope landslide is of great significance to slope treatment engineering.Based on the fracture mechanics theory,the hydraulic fracturing of the sliding surface of the rock slope in the Three Gorges Area is studied in this paper.The research results show that the rock slope will have hydraulic fracturing under the action of certain water head,and the hydraulic fracturing will expand and penetrate the cracks in the sliding surface of the rock slope,increase the permeability of the slope,accelerate the speed of seepage,and promote the formation of new soft fracture surface,and so on,and finally lead to the landslide failure of the rock mass.The formula of critical water head deduced in this paper is verified by practical cases and has certain reference value,but it needs to be modified by experiment and theory to some extent.