Determination Of Potential Fracture Surface Of Loess Slope And Engineering Management Measures

For the traditional method to determine potential failure surface of slope and the loess slope engineering management measures selection is to optimize the existing deficiencies and through the slope landslide case application strength subtraction and editing the calculation and analysis of potential failure surface position determining program,the loess slope safety factor and potential failure surface position change rule,for the future of the loess slope stability analysis,and fracture surface location provides a certain reference,for sure,at the same time also on loess slope reinforcement measures to optimize the instruction.Research results have been obtained as follows:?1?Based on the results of previous studies,this paper compares the theory of slope stability analysis and finds that it is more scientific and convenient than other methods.comparing the strength reduction method with the simplified Bishop method,it is found that the strength reduction method is the same as that obtained by the simplified Bishop method.When the external force is constant,if F_s1 is adopted to calculate the safety factor,the results of both methods are the same.Through the study of saturated-unsaturated soil seepage theory and unsaturated soil strength theory,it can be more realistic to simulate the potential fracture surface location of loess slope.Through the above theoretical research,it provides a theoretical basis for the location determination of potential fracture surface of loess slope.?2?Through finite element calculation software of FLAC3D,and the self-made Fish program of typical loess slope is analyzed,the loess slope under the effect of different water level,the seepage field,the changing rule of the safety factor and failure surface position.Through the numerical simulation analysis:when the water level within a certain slope,slope before the water level rise,formed by the seepage inside the slope to the slope before,result in higher safety coefficient of slope,and the potential failure surface position to the inner slope development;Comparing with the results of the limit equilibrium method,it is not difficult to see that the analysis result of strength reduction coefficient is relatively real.?3?In this paper,based on the research of the improvement measures of slope engineering,and engineering control measures for the classification,mechanism,advantages and disadvantages,applicable scope,and summarized the situation of application,the selection of engineering control measures for loess slope provides scientific guidance.?4?Using FLAC3D,a calculation analysis is made on the stability of a fill slope in Yu Lin,its safety coefficient as well as the potential failure surface position,and the engineering control measures are discussed,to select the optimal control measures,namely the prestressed anchor reinforcement as the main measures of strengthening methods,and to the stability analysis of the reinforced slope.The results show that the prestressed bolt has an advantage in strengthening the loess slope.