滑坡变形破坏机理和整治工程的模型试验研究

MODEL TESTING RESEARCH ON DEFORMATION AND FRACTURE MECHANISM OF LANDSLIDE AND ITS HARNESSING ENGINEERING

为分析某滑坡的变形破坏机理以及整治效果,选取了不同的模型材料来模拟相应的岩类,以相似比1∶200建立了滑坡的模型。通过地质力学模型试验,模拟并研究了不同工况下滑坡体位移、抗滑桩和锚杆的受力状态随试验步骤的变化,根据试验结果对滑坡变形与破坏机理进行了分析,比较了2种加固设计参数下的整治效果并进行优化。该成果可为该类滑坡的机理研究和有效整治提供科学依据。

To analyze the deformation and fracture mechanism and the harness effects of the landslide, by large scale model testing, the authors select several different materials to simulate corresponding rocks and structure for the model of the landslide with a model scale of 1: 200. The model has size of 240 cm × 120 cm × 20 cm. Based on the geomechanical model test, the deformation and fracture course of the landslide of four different states: natural state, excavating state and two different reinforcement state, are simulated; and the displacement of landslide, the stress state of anti-slide pile and bolt of different testing procedures are studied. On the basis of the testing results, the deformation and fracture mechanism of the landslide are analyzed; and harnessing effects of two different reinforcement designs are compared and optimized. The study result provides a scientific basis for mechanism study and treatment of the landslide.