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Research of En Ziping 1~# Landslide Stability in Bai Hetan Hydropower Station in Jinsha River

Author: HouYanLing
Tutor: ShiYuChuan
School: Chengdu University of Technology
Course: Geological Engineering
Keywords: Landslide Genetic mechanism Stability FLAC3D Numerical Simulation
CLC: TV221.2
Type: Master's thesis
Year: 2011
Downloads: 81
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Abstract


Jinsha River hydropower station is Panzhihua to Yibin River cascade hydropower development in the second level, is China's second of the Three Gorges, Xiluodu Hydropower preliminary work undertaken after another one million kilowatts or more of the giant hydropower station. En Sub Ping 1 # landslide dam hydropower station is located about 5km downstream, the hub of instability and failure does not directly threaten the safety of buildings, there was no problem of reservoir sedimentation. However, swell and may cause landslides blocking the river, on the hub of the building there are different degrees of impact safety, mainly in: First, the sliding body into the reservoir to a certain speed, it will definitely have a certain degree of swell, and dams and other hydraulic structures have some impact; secondly, landslides blocking river once formed \This paper elaborates on hydropower station dam downstream of the sub-floor en 1 # landslide engineering geological conditions, combined with specific engineering practice, field surveys in the field, drilling information and data on the basis of adit From the morphological characteristics of the landslide, material composition and characteristics of the three aspects of deformation and failure summarize the basic characteristics of the landslide; proceed from the landslide formation conditions of its analysis to determine the genetic mechanism, and through the two-dimensional discrete element simulation of the formation mechanism for Verify that the early days of the landslide slip - shear mainly in the late failure process is more complex, during which there may be unloading Effect; mechanism based on the analysis in determining the geological model and destruction mode, using qualitative determine and quantify the stability of landslide current trends and possible changes in analysis and evaluation, which reduce the harm and losses landslide is very necessary. The use of geological judgments and limit equilibrium method and other methods, the overall stability of the landslide, local stability and stability after reservoir system analysis, calculation and evaluation, and through three-dimensional finite element software FLAC 3D < / sup> for numerical simulation of the stress field characteristics and landslide deformation characteristics were analyzed, and the simulation results with the above conclusions and results were analyzed in order to achieve the effect of each check. Through the destruction of the landslide form and scale of damage analysis and studies to identify the event as a whole in the landslide sliding exceptional circumstances arising after its occurrence swell height and whether blocking river two questions was calculated and analyzed, as a basis for hazard assessment. The results show that, uh sub-floor 1 # natural state landslide better overall stability, storms and earthquakes state landslide impact on the overall stability of the larger, but still meet safety standards. By local stability analysis, uh sub-floor 1 # landslide rear because of the terrain PVIs more unstable parts of the distribution in the leading edge of the steep region Ⅰ lots of disintegration and failure mode instability, Ⅲ, Ⅱ area platform and local relief units become stop the plot premises, will not enter the Jinsha produce landslides blocking river. The results show that the swell, swell near the dam reached the height of only 0.5m, have little effect on the project.

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CLC: > Industrial Technology > Hydraulic Engineering > Hydraulic investigation of hydraulic design > Hydraulic investigations > Engineering geological and hydrogeological exploration
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