Physical Simulation Test On Micro-group-pile For Landslide Hazard Control Technology

Loess landslide are widely developed in loess area of China, multiple, harmful strong supergene geological disasters, which frequently occur, not only for the local people's lives and property caused serious harm, it also restricts the vast loess region sustainable development of the national economy.Among the landslide control technology, micro-pile technology is a concern in recent years only by the new technology, because of its site adaptability, a small disturbance on the slide, the advantages of construction speed, there may be loess landslide disaster prevention an important technology in its in loess landslide in-depth study of the applicability and reliability for the development of loess landslide control techniques and methods, has important theoretical significance and application value.The article is in the China Geological Survey Project "Control of Landslide micropile large physical simulation" based on, carrying out the basic parameters of test piles and pile reinforcement reinforcement of large-scale physical model of heart tests. By using the displacement sensors, water level, soil pressure sensors, resistance strain gauges and other test instruments, analysis of micro-piles in the loess landslide of the Forces, and pile their mechanical properties and micro-piles with and without additional test data when the landslide model comparison, the initial stated bearing mechanism of micro-piles, micro piles to determine the failure mode.With FLAC 3D finite-element software to establish micro-pile structure of loess landslide and the numerical model, numerical calculation and analysis of the landslide model of the displacement, the maximum unbalanced force variation, landslide model, the distribution of principal stress, and micro-piles under load force, torque and displacement vector such circumstances, and with the model test results were compared, combined, each argument, further elaborated the bearing mechanism of micro-piles, micro piles under the loess landslides and the destruction of the force characteristics of the law.