基于地震波散射效应的堆积型边坡稳定性综合评价/致灾范围预测方法研究

堆积型边坡在西南强震山区广泛分布，其稳定性已成为影响“一带一路”沿线交通基础设施建设的重要问题。虽然已有文献探讨了堆积型边坡地震稳定性评价方法、失稳机理及致灾范围，但鲜有文献从非线性波动理论研究坡体内多种波干涉所形成的非平稳波动场，而这正是诱发边坡滑塌致灾的源动力。据此，本课题从坡体内非平稳波动场出发，涵盖堆积体由变形累积、失稳启动、高速滑动、堆积自稳全过程，以滑体内应力场和位移场的内在关联机制为桥梁，解决岩土体中和、差频波间相干特性等科学问题，揭示地震作用下堆积型边坡动力特征和致灾机理，探明地震波-岩土体的非线性动力耦合机制与滑体内地震波能量累积效应，建立滑体启动能量非线性波动方程与运动方程，提出基于地震波散射效应的堆积型边坡稳定性综合评价/致灾范围预测方法，为我国西部强震山区大量堆积型边坡地震稳定性评价、抗震设计及施工营地选择提供技术支撑，为推动相关学科理论的发展和创新做出贡献。

The accumulation-type slope is wide-spread in the southwest earthquake mountain zone, whose seismic stabilization is the important problem affecting the development of transportation infrastructure constructions along “One Belt and One Road” and its theoretic defects also is the restrictive factor for science development. Although some studies have been done on the analysis method of stabilization, Disaster-Causing Range Prediction Method of the accumulation-type slope and failure mechanism of landslides triggered by earthquakes, but few studies discussed non-stationary wave force caused by the hindered action by the several type waves, and the wave force is the source power triggered the landslide. Therefore, this project is studied from the non-stationary wave field in the slope, containing the accumulative deformation, instability, high-speed slippage, accumulation-stability process, the internal relationship between pressure field and displacement field is the bridge, the coherent characteristics of difference-frequency wave will be solved, and the landslide mechanism and dynamic characteristic is studied. The cumulative effects of seismic wave in the sliding body and the non-linear behavior of seismic wave-rock and soil is ascertained, the non-linear wave equations of starting energy and motion equation of sliding body is established. At last, stability comprehensive evaluation and disaster-causing range prediction method of accumulation-type slope based on seismic wave scattering effect is proposed, which is helpful to stability evaluation and seismic designs of s large number of accumulation-type slope and the selection of construction camps, and also is helpful to promote the develop of the related analysis theory.