Research On Evaluation Of Safety For Slope Close To The Dam And Reservior

As slope close to the dam and reservoir is near the dam and other main hydraulic structures, its instability will cause serious impact on neighboring hydraulic structures. Therefore the slope has been the focus of attention and research hot focus. At present, China is in the peak of water conservancy construction, cascade reservoirs become the main form of basin development and have 800～2000m head, with a total capacity of over one hundred billion cubic meters of water, so the system of cascade reservoirs security is very important. Slope close to the dam is affecting the safety of hydraulic structures, thus even one of the important factors of the entire reservoir System security. In Cascade Reservoirs, it is important outlet structures import and export of slope instability hazard not just for a single cascade itself, these hazards may be inside the entire cascade system conduction, overlay and amplification, causing great human catastrophe. Slope safety factor is a single specification for a single library of single dam at present, and not containing risk, reliability, safety factor comprehensive evaluation criteria, and the planning of special high dam, the slope of standard grades but also with risk The match; Slope close to the reservoir due to the wide distribution area and geological characteristics of the complex, the use of traditional methods may be hard, and cascade reservoirs of water level changes in scheduling a great impact on slope stability, the urgent need for a consideration of the impact of water level slope fast and stable analysis. Therefore, further study of the slope near the dam safety control standards and evaluation system has important theoretical significance and broad application prospects.Based on design and construction characteristics and apply conditions of the slope close to the dam and reservoir in Cascade Reservoirs, taking into an important outlet structures import and export of slope and slope are generally two types of bank slopes for special study their characteristics. The main contents are as follows:(1) Summarize the existing slope specified the slope safety classification principles and values of the safety factor standard principles. Comprehensive analysis of each country, the acceptable level of risk in different sectors, drawing on the slope of risk and a reliable indicator of the results of previous research, the reality of our country, the safety factor is recommended a slope of 1.30, an acceptable level of risk for the 1.00×10-5 in a year, a reliable indicator of 3.10.(2) Important discharge structures for the import and export of slope, with the national 973 project "Cascade Reservoir life cycle and safety risk prevention mechanism conceived the theory of the subject of conventional cascade reservoirs super high dam design criteria and risk control standards for the three research proposed based on matching with the corresponding slope and features a special two slope. Special risks a slope corresponding to 1.00×10-6 in a year, special two slope corresponding risk 5.00×10-6 in a year; corresponding respectively to allow a reliable indicator 3.70 and 3.45. Based on the relative safety factor theory by slope model and engineering example, the proposed special one and especially two of slope safety factor were 1.45 and 1.40.(3) For general bank slopes, slope stability traits can react using displacement data inversion using the finite element method of slope affected by changes in water level security trait. Resolve displacement-stress field simulation key technical issues and safety factor strength reduction, etc., in a single factor condition, the method proved Displacement back slope of traits it is feasible.(4) According 1# Landslide long series of displacement monitoring data Xiaolangdi affected by changes in water level, based on the displacement field inversion safety factor of the slope with long-term changes in water level, by the safety factor into the formula closest to the actual state of scores ESMR, research libraries water level changes and the correlation coefficient and ESMR safety value. Factors to consider changes in the water level, sub-construction period, impounding and operation of three periods of CSMR evaluation system be amended to make CSMR system is suitable for Cascade Reservoir Bank Slope.