FLAC3D-Based Slope Stability Analysis

In recent years, with the constant development of infrastructure construction in our country and the city scale expands unceasingly, the stability of the slope engineering research and related management work has been the focus. The widely used infrastructure construction of high and low fills-in way composed of a large numbers of urban construction land within the building slope, so the importance of slope governance is self-evident. In this paper, refers to a large amount of relevant literature both at home and abroad, and tries to sort and sum up the slope engineering examples, thus concluding four types of typical morphology of the slope deformation model. Slope stability problem is always the key point of the research, thus the slope stability analysis is helpful to guide the construction of production effectively. By using the FLAC3 D, in combination with “mixed discrete partition”and “reality Lagrange algorithm”, the slope stability analysis of tunnel construction and mining engineering can be implemented. Based on the analysis of Ankang taoyuan village survey and appraisal on the basis of the engineering geological characteristics of the landslide, the FLAC3 D is used for systematic study. Several conclusions can be made.(1) At the top of slope during the survey did not appear the perfoliate cracks, but in the U-shaped building appears two open cracks on the north side walls, the width of crack has more than 10 mm, the direction of the crack is approximate straight down; The distance between the first and second cracks from slope is 10 meters and 25 meters respectively; The cracks of U-shaped building were found in the area between the two cracks, and the cracks is relatively small, the fences and wall of the building does not appear obvious diagonal cracks, there are tensile cracks ang its harmfulness in controllable stage at present.(2) According to the situation, using the engineering drilling and FLAC3 D numerical simulation to analyze slope stability, through the simulation analysis of slope deformation trend, according to the main simulation results show that the proposed site is no ancient landslide, found no new sliding surface. In addition to the west changxing are Ⅱ phase of the influence of high slope, the no other adverse geological problems of slope height range without the negative impact of the stability of groundwater. The slope deformation of supporting structure did not appear completely signs of stability, climate change and continuity over time and had a tendency to increase. At the same time, the simulation results with the deformation observation data, the two basic consistent, thus concludes that the supporting structure require corresponding reinforcement measures.(3) On the basis of field drilling, the analysis of the soil test data and the results of numerical simulation, the slope engineering drainage should be strengthened, and then,using prestressed anchor reinforcement, the specific scheme shall be designed with qualifications entrusted by the design units.