Study On The Convergency Of Janbu Methord And Realization Of General Methord

The study of two-dimensional slope stability have already come to consummation basically, which are also widely used in the actual project, most of two-dimensional slope stability have been derived strictly in the according assumption, and have good convergence.. two-dimensional slope stability can be divided two sorts; first assume the direction of force between soil bar; the other assume the position beared by force between soil bar . aheard is represented by Chen Zuyu general method propose in the base of Morgenstern-Price method, and is very popular as its good convergence. next is represented Janbu general method which obtained under the condition satisfying both the force and moment equilibrium, but sill exists problem of convergence, and the reason about which also is variously. This article begin with the convergence question of the Janbu method which is one of the limit equilibrium method, mainly carries out the following research:1. What is The reason that Janbu general method is not convergent? whether caused by the earth strip lateral force action point position is supposed locates in the absolute value not in the relative value, or the strip width is too small or the strip quantity is too big and the first derivative of the termed moment no longer continuous, then the second time derivative of the moment will not exist which causes that not to restrain. In this paper through the calculation of the formula, the detail examination, the example confirmation, the reason why it is not convergent will be discovered, carry on recalculation to the example which will not be restrained unifies improvement to the Janbu method by Wang Fulai, indicate that stable convergence have nothing to do with the earth strip number.2. In the foundation of former sessions masters study, through the analysis of slope, various kinds of different complex terrain landside mass, including the lens stratum and the random inclination angle's complex stratum, lists the relations of the circular arc slip crack surface and the tangential path, solves the point of intersection by the slip crack surface equation and the tangential path stratum equation, exclude the stratum information outside the slip crack surface's, thus establishes the nimble convenience slope stability analyses geometric model.3. Summarize the searching method of the most dangerous sliding surface in recent years, introduce the non-numerical method, which are used in the circular arc and the non-circular arc sliding surface search, carry on the example analysis, compare the vantages and disadvantages of various methods, finally simulate the optimized method combining the annealing method and the genetic arithmetic, establish theoretical foundation for software search module of two-dimensional slope stability analyses.4. Establish the investigation of slope our group which has been got in recent years on the complex slope model proposed in this article, use Visual Basic language to exploit two-dimensional general slope stability analyses program, canculate the ACADS and project example to show the maneuverability and applicability of the software by one slope example.