Discussion on Optimum Design Model and Method of Soil Nailing

Aiming at the irrationality and limitation of design method in soil nailing,firstly,a concept of distribution coefficient of soil nail's tense is advanced in this paper by analyzing its mechanism.Then,based on researching the computing model of soil nail's length,and combined with the limit equilibrium analysis method for the globe stability of soil nailing,a optimum design model is established.Finally,the improved simulated annealing algorithm and the method of geometric controlling parameters is introduced in.On this basis,the exact implementing procedure of soil nailing's optimum design method is researched.And then the corresponding programs are developed.The analysis of engineering cases shows that this method has both safety and evident economy,and have certain theoretical and engineering practical value.