基于斜坡渗流场和滑带土变异的灌溉型黄土滑坡演化机制研究

Loess landslide induced by water related activities is increasing and causes serious damage, it is restricting sustainable development of loess area, so studying on evolutional mechanism is necessary to scientifically predict and control. Evolution of landslide is gradual process, starting with local failure, and then propagation, finally massive destruction. Surface configuration change is loess landslide external performance, but slope seepage field change and mechanical properties deterioration of sliding zone soil are developmental internal process. This project plans to acquire continuous observation data of slope seepage field through press-in pore pressure test、TL-ERT technology and others; Based on unsaturated soil mechanics testing technology, built mechanical properties deterioration law of sliding zone soil; analyze landslide structure law of multi-stage UAV photogrammetry and on-the-spot investigation. On this basis, analyze influence of different factors on instability, restore loess landslide evolution process and put forward its evolution model. This study provide scientific and theoretical basis to disaster of the loess plateau prevention and control, environmental protection, and the sustainable development of the regional economy, at the same time, the new technique in this paper can be applied to other types of geological disasters.

人类水事活动引起的黄土滑坡呈上升趋势，危害严重，制约了黄土地区的可持续发展，因此需要对滑坡演化机制进行研究，从而对其科学的预测和调控。滑坡演化是从局部破坏开始，然后扩展，最终大规模破坏的渐进过程，表面形态变化是其外部表现，而斜坡渗流场变化及滑带土力学性质劣化是其发展的内在过程。本课题拟采用压入式孔压测试、TL-ERT等技术，获取斜坡渗流场的连续观测数据；依托非饱和土力学测试技术，建立滑带土力学性质的劣化规律；利用多期次无人机摄影测量和现场勘察，剖析滑坡结构的变化规律。在此基础上，通过力学分析、数值模拟等方法，分析各因素对失稳的作用方式及其影响程度，还原滑坡的演化过程，提出其演化模式。这项研究将为黄土高原灾害防治、环境保护及地方经济可持续发展提供科学依据和理论基础，同时本研究提出的技术方法可应用于其他类型地质灾害的研究。

人类水事活动引起的黄土滑坡呈上升趋势，危害严重，制约了黄土地区的可持续发展，因此需要对滑坡演化机制进行研究，从而对其科学的预测和调控。滑坡演化是从局部破坏开始，然后扩展，最终大规模破坏的渐进过程，表面形态变化是其外部表现，而斜坡渗流场变化及滑带土力学性质劣化是其发展的内在过程。本课题拟采用压入式孔压测试、TL-ERT等技术，获取斜坡渗流场的连续观测数据；依托非饱和土力学测试技术，建立滑带土力学性质的劣化规律；利用多期次无人机摄影测量和现场勘察，剖析滑坡结构的变化规律。在此基础上，通过力学分析、数值模拟等方法，分析各因素对失稳的作用方式及其影响程度，还原滑坡的演化过程，提出其演化模式。这项研究将为黄土高原灾害防治、环境保护及地方经济可持续发展提供科学依据和理论基础，同时本研究提出的技术方法可应用于其他类型地质灾害的研究。