Based On The Fuzzy Comprehensive Evaluation Method Of High And Steep Slope Stability Study

With the enlargement of the scope and scale of railway construction in our country, we will face more and more high and steep slope construction. Compared with the conventional slope construction, during the construction of high and steep slope, the analysis of slope stability, slope construction method and protective measures of the selected, don’t have a lot of gay. Believe:the high and steep slope stability and the high and steep slope construction method choice and protective measures of research, will be in the future construction of the high and steep slope has a certain reference and guidance. Taking YunGui in railway tunnels, Bridges, deep cut, such as the engineering background, study on this issue, the main research content is as follows:(1) In view of the high and steep slope stability in combination with the current research situation, clear from the internal cause of geological condition of slope stability is analyzed. Calculated, using plane projection method in the calculation results are consistent with the actual engineering, on the basis of specific construction of the key factors, and USES the fuzzy comprehensive evaluation method to evaluate the high and steep slope stability influence factors.(2) On the construction of a project on both sides of the river bank slope rock mass and its structure characteristics, the bank slope rock mass deformation and failure mode, etc were studied. And through the field investigation analysis and plane projection method, draw the conclusion:under the effect of external force, the valley of the bank slope rock mass deformation failure mode for the dumping of collapse or fall type failure mode, and is subject to the influence of rock mass structural plane cutting; Shot plane projection and through analysis and calculation of stability coefficient of the composite rock mass structure surface, draw the conclusion:valley cross-strait unstable block, no big and natural condition, on both sides of the river bank slope stability is good.(3) According to the calculation of plane projection, and comprehensive evaluation method is used to determine the influence factors of high and steep slope stability, evaluation index by strata occurrence, joint occurrence, jointing stage, slope foot, etc. According to different construction conditions again repeatedly to determine the weight of each evaluation index, and establish the fuzzy comprehensive evaluation model in order to further study the influencing factors of high and steep slope stability.(4) Of the project site investigation and analysis of field situation, especially the tunnels, Bridges, deep cut of engineering analysis of the investigation, all of above project evaluation index affect slope stability evaluation, draw the conclusion:For tunnel construction, mainly is the hole location involves the slope stability evaluation, at this time, because the hole of the construction of the old mountain has certain disturbance, rock occurrence, should be considered joint evaluation factors such as the impact on the slope stability; Is mainly used for bridge construction position involves the slope stability evaluation, at this time, due to the construction of the shafts, to a certain slope protection, prevent the impact of pier construction, joints, such as slope evaluation should be considered the influence of factors on the slope stability; For deep cut construction, excavation process involves mainly line slope stability evaluation, at this time, due to the requirements of cutting excavation method, you need to the whole process of slope protection, prevent the impact of cutting excavation construction, should focus on equilibrium considering influence of all the evaluation factors of slope stability.