Study On The Factors Of Slope Stability Of The Retaining Wall Of The Slurry Block

Stone masonry materials have the advantages of its widespread and easy to get, cheap, simple construction process, with good integrity, high strength and compactness, and long service life, but also has better prevent seepage, leakage and water resistance advantages erosion ability, so that a wide range of the western region to adopt anti-stone masonry retaining wall, slope protection, therefore the study of its stability has far-reaching significance in engineering practice. In the engineering practice of both at home and abroad, the design of retaining wall slope is used mostly national standard of the look-up table method and the finalize the design atlas to paraphrase. Mainly based on the reliability analysis method of probability to analyze and calculate the stability of the retaining wall slope. However, pulp block stone retaining wall slope stability is influenced by engineering, geology and many other factors, and it has uncertainty and randomness, variability, vagueness, nonlinear, and many other features, in between stability and the stability with no clarity. Based on the study of the scholars at home and abroad, in this paper, by using the principle of orthogonal test design to arrange experiments, and application of coulomb's earth pressure and force more reform to calculate the safety factor, then based on the mutation theory of catastrophe progression method to further analyze the stability of masonry retaining wall slope, and then compared with the result based on reliability analysis. The following conclusions is:(1) Using orthogonal design principle and force polygon method to calculate the size of the factor analysis of the impact of stone masonry retaining wall slope stability are: retaining wall height h > inner packing friction angle ? > Soils Retaining wall friction angle back ? > severe slope soil behind the wall ? > Retaining wall verticality i > soil retaining wall on the substrate coefficient of friction ?.(2) The mutation theory into qualitative and quantitative judgment example of stone masonry retaining wall slope stability in the past, firstly determine slope stability evaluation system, and then to judge determining the utility function of evaluation and low- level factors, and finally normalized basis, then to display out the results intuitive in grap hical form, for comparative analysis. Obtain judgment based on cusp catastrophe theory, monitoring slope stability, become more secure, dynamic, practical.(3) If the limit state equation of the function line with the overall normal distribution, according to the formula(3-9) can be obtained probability of failure of anti-slip and overturning stability of >0.5, reliability index is low, the probability of failure is high, it can predict the overall stability of poor structure. In line with Chapter VII of the method of application of cusp catastrophe predicted results. And are in line with stone masonry retaining wall slope to the actual monitoring results.(4) By the(6-18),(6-26) two non- linear structural reliability index calculated performance function and its value taking into account the probability of failure and the uncertainty of geotextile material parameters of the physical and mechanical properties of materials non-linear, the final results more in line with the actual project situation.(5) O n the basis of qualitative and quantitative analysis of structural reliability of the overall stability of stone masonry retaining wall slope is determined, the results are more in line with actual requirements, but choose to optimize its performance function and computing complex. And based on cusp catastrophe theory of stone masonry retaining wall slope quantitative study, its calculation is simple and can change the dynamic stability of the process described in the retaining wall, has some practical value promotion.(6) Based on the analysis of the results of numerical simulation FLAC3 D stone masonry retaining wall displacement contour shear strain increment cloud, plastic zone distribution studies, draw stone masonry retaining wall slope possible RB mode overturning instability failure, damage and slipping instability, and the conclusion is substantially the catastrophe progression method and nonlinear structural reliability analysis consistent with the results obtained.