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Numerical Simulation Of The Reactivation Mechanism And Stability Prediction For Xiaoqiudi Landslides In Shiziping Hydropower Station

Posted on:2012-01-11Degree:MasterType:Thesis
Country:ChinaCandidate:J S XiangFull Text:PDF
GTID:2120330332989141Subject:Geological environment and engineering
Abstract/Summary:PDF Full Text Request
Shiziping Hydropower station, Sichuan Province Li County Guergou Town Xiaoqiudi, is a tributary of the Minjiang River basin Zagunao leading the development of power plants. Xiaoqiudi landslide , on the right bank of the 500m before the Shiziping dam,is a old landslide. Landslide width of about 800m, after the margin to the 2980m elevation, front elevation to the reservoir foot of 2430m, the average thickness of about 35.0m, the total volume of 1660×104m3, is a large deep downturn. Located near the dam, the safety of the dam constitutes a hazard. Therefore, the instability of the landslide formation mechanism of the reduction of the lion Hydropower Station has practical significance for disaster prevention.According to the survey of the Landslide, by FLAC3D software, three-dimensional numerical simulation, the resurrection of the hill to slide mechanism. Based on simulation results, based on limit equilibrium theory by the transfer coefficient method to make quantitative evaluation of slope stability, deformation and failure of landslide prediction methods. Finally, this paper can be obtained through the following results:1.Identification of engineering geological conditions of the landslide and landslide boundary, material composition and structure of the basic characteristics of deformation and failure, and landslides in the plane is divided into an old landslide residue (HP-1), 2 sub-landslide (HP-2 and HP-3), 2 new landslide (HP-2-1 and HP- 3-1) five-slip zone.2. Phyllite interbedded sandstone and metamorphic easily lead to the geological structure of rock weathering avalanche, landslide body sustained load on the slope is the main cause of the old landslide. Later river erosion is cutting the main reason for the formation of secondary landslide. The recent earthquake, rainfall and reservoir storage are the new landslide induced by the resurrection of the major factors.3. Numerical simulation results show that: Before water storage,the landslide is local creeping.After water storage,the landslide surface showed a strong creep-crack type deformation,and along the soil interface, the overall trend of the Resurrection.4. Landslide stability results show that: Sliding surface is located the downstream side of the landslide area beneath the body platform.The overall performance is from front to back in the form of block.,but is not one-time destruction of the whole landslide.
Keywords/Search Tags:Shiziping Hydropower station, landslide mechanism, FLAC3D, Limit equilibrium method
PDF Full Text Request
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