Study On Safety Of Bank Collapse In Mountainous Canyon Reservoir And Its Prevention

Reservoir slope collapse and deformation is prevalent in the construction of water conservancy and hydropower engineering problems, especially mountainous gorge reservoir. Due to the landslide go over a broad area, the reservoir area has brought a great impact to the normal use of the stations, but also causing deformation and damage to reservoir engineering facilities (such as roads, railways, factories, etc.), housing construction, farmland, villages, etc. The seepage and stress field of reservoir bank changes, stability analysis and prevention is more complex. It has been a technical problem to be solved. To carry out this research has great practical value and academic value. Therefore, this paper carried out the following tasks:(1) Based on the detailed engineering investigation and trial, in order to determine the calculation diagram and geotechnical parameters, the study provides an overview of the reservoir area of engineering geological conditions, hydrogeological conditions. By summarizing the occurrence and development of major bank collapse factors and models to describe the bank collapse bank collapse mechanism.(2) This article was first proposed use Geoslope geotechnical analysis software to achieve the ultimate scope of bank collapse prediction calculation of numerical methods to Jin’anqiao Reservoir gravel soil slope engineering examples, combined with the previous three proposed graphical method (Cacho 3oxoto method, Zhuoluo Ta KopoxeB method and three stage method) compare computational analysis, describing dynamic geological processes of bank collapse and predict the final scope of bank collapse. Four collapse prediction by comparative analysis method to verify the effectiveness and applicability of predictive Geoslope proposed numerical simulation collapse prediction methods.(3) In a study of the reservoir area of slope safety, the use of geotechnical finite element software Geo-Slope, consider the slope of saturated-unsaturated stress state influence, the application SWCC establish Jin’anqiao reservoir gravel soil slope two-dimensional saturated-unsaturated flow model to simulate the initial reservoir storage-often running water-drainage process slope seepage and stability characteristics of evolution, analyze reservoir water level fluctuation and falling water infiltration rate on slope line and the safety factor. The impact is described under the influence of reservoir water, variation of the slope of the stress state.(4) The use of quasi-static and dynamic finite element method comparative study slope in reservoir at 8 earthquake seismic intensity, obtained the safety factor by pseudo-static method (including Janbu, Biship, Morgenstern-Price limit equilibrium method), and calculate the the safety factor chart by the finite element method, from the perspective of stress and strain analysis of the state of stress and strain, get the concentration zone of seismic conditions in reservoir slope.(5) Based on the slope of the reservoir area of the safety study, based on the mechanism of the existing types of bank collapse,categorized reservoir slope protection technology, and proposed control measures to adapt to the different modes of bank collapse. The article also focuses on the introduction of eco-engineering protection technologies, such as vegetable belt protection, gabion engraftment stumps protection and ecological brick with gress protection, in order to meet the dual benefits of engineering and landscape.