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反倾状岩体边坡的破坏和普通的滑坡不同,其破坏过程和破坏机理尚不十分清楚。不良结构面滑移是其中的一种典型破坏形式,这种形式的滑坡和地质构造有紧密的关系,用常规的连续介质理论无法模拟岩体破坏、分离和滑移的大位移过程。根据非连续块体理论,采用离散元软件UDEC,模拟不良结构面的张开、滑移和破坏行为,研究这类边坡治理的有效措施,为实际施工提供参考。通过模拟分析典型的公路软硬互层岩石边坡工程稳定和破坏滑移特性,结合现场监测和试验数据,确定合适的物理力学参数。在此基础上,研究滑坡发生在反倾斜岩质边坡的工况,模拟结果表明三条连续贯通的滑动面发生大位移滑移破坏,其中滑体内多处发生开裂、分离和滑移现象。通过滑体内最大不平衡力的演化规律,揭示滑动过程是一个高能量逐步向低能量变化的过程。
The failure of anti-dumping rock slope is different from that of ordinary landslide. The destruction process and failure mechanism are not yet clear. The slip of poor structural plane is one of the typical forms of failure. This type of landslide is closely related to the geological structure. The conventional continuum theory can not simulate the large displacement process of rock mass destruction, separation and slippage. According to discontinuous block theory, discrete element software UDEC is used to simulate the flaws, slippage and destructive behavior of the poor structural plane, so as to study the effective measures for such slope treatment and provide references for practical construction. Through the simulation analysis of the stability and failure slip characteristics of the typical highway soft and hard interbedded rock slope engineering, with the on-site monitoring and test data to determine the appropriate physical and mechanical parameters. On this basis, the landslide occurred in the reverse slope rock slope conditions, the simulation results show that the three continuous through the sliding surface of the large displacement slip damage, in which the body slip occurred in many places cracking, separation and slippage phenomenon. Through the evolution law of the maximum imbalance force in the sliding body, it reveals that the sliding process is a process of high energy gradually changing to low energy.