The Evaluation And Analysis Of Rock Slope’s Stability In Anchorage Area Of Jinsha River Bridge

The problem of rock slope in mountain area is still a major geological hazard problem in the construction of infrastructure, people’s life and property and economic development. Therefore, how to correctly assess the stability of rock slope has considerable practical significance. At present, the qualitative evaluation method and quantitative analysis method are used to evaluate the stability of the slope. Qualitative assessment generally adopts the traditional slope stability evaluation methods, such as SMR method and CSMR method. The traditional method is influenced by the individual subjective uncertainty, and does not have the complete objective justice. The influence of the large structures on the slope is seldom considered in the study of the stability of the slope in the quantitative analysis. Therefore, this paper to Shangri-La to Lijiang highway SJ1 standard Tiger Leaping Gorge of the Jinsha River Bridge project relied on the project, carry out research work for the project bank of Li Jiang anchorage zone of slope, the main contents are as follows:1.Field survey the engineering conditions, topography and lithology of the bridge site slope, and analyze the engineering situation in the area.2. According to the need of the project, the author carried out the original adit test of rock slope in Lijiang shore anchorage area. The test is divided into in situ load test and in situ shear friction test. The rock and soil properties and the basic mechanical parameters of the rock slope are found out by the test.3. The author expounds the basic concept of CSMR method and gray correlation method, and discusses the feasibility of using CSMR method to combine the gray correlation method and the existing slope experience to the comprehensive qualitative evaluation of slope. In the anchorage zone of slope as the object for analysis using the qualitative evaluation method model is established, and calculate the results of the qualitative evaluation of slope stability.4. According to the measured data of the test, to rely on engineering Lijiang shore slope as the analysis object, using the numerical simulation software to establish the finite element model of slope, and considering the influence of gravity anchorage loading on the slope, obtained by calculating the results. The stability of the slope was quantitatively analyzed, and the results were compared with the qualitative evaluation results.5. On the basis of relying on the project, to study depending on the location of the anchorage structure scheme on the slope of the effect, the author respectively to establish finite element of anchorage slope model, comparative analysis finite element calculation results, and discuss the reasonable location of anchorage.