The Research And Realization Of Calculation Of Loess Slope Fracture Method

Based on more than30years ago by Zhao Xue meng, Chen Yunli method of loess slopeis put forward by fracture of the theoretical basis for research. Due to the loess area in ourcountry up to63.1square kilometers, is the world’s largest loess area, a third of the landslidedisaster in loess areas. Vertical fissure development in China is very common, cracks on theloess slope stability has an important role, so in the loess slope stability calculationconsidering the influence of vertical fracture is very necessary. In this paper, the mainresearch contents and conclusions are as follows:First, in this paper, based on the research of the nature of loess and loess slope, thefracture of the loess slope stability analysis; Through the loess landslide phenomenon ofobservation, analysis of the deformation mechanism, obtain the bad process is divided intofour stages, slope toe cracking shear crack stage, peak stage, fissure deepened, slope for theoverall destruction;Second, assuming that the destruction of the loess slope surface shape instead of a singlecircular arc surface composite curve, according to the fracture surface will be calculated onthe basis of the whole body is divided into two bursts. Analysis of the broken body ofcohesive force and the gravity slide torque and resistance torque calculation, the slopestability of sliding minimum safety factor of sliding resistance torque divided by moment,want results.Third,determine the method of loess slope fracture calculation program to complete thetwo main functions of stability calculation and general chart drawing, using Visual c++. Netlanguage development stability calculation function, choose AutoCAD graphic platform foruse Objectarx technology generated calculation drawing and parameter list.Fourth, using the new loess slope fracture for instance calculation method to calculateprogram, and for the same project example calculation by using the original crack look-uptable, respectively by the methods of fracture, Sweden arc method, the simplified bishopmethod calculation, the calculation results of the compare and analysis method of fracturemethod and the accuracy of the calculation results and analysis.