Stability analysis of composite soil-nailed wall with prestressed anchors

摘要

Based on the limit equilibrium theory and the slice analysis method for the stability of soil-nail braced supporting structure, according to the composite soil-nailed support structure and the stability factor of safety relationship for parabolic assumption slip surface, and use the geometry relationship with the method of circular, the search model of the most dangerous slip surface were set up and solution formula of stability safety factor is derived. The function relations among the geometrical controlling parameters of sliding surface and the stability safety factor are deduced. Calculation of integral stability of a building foundation pit with the composite soil-nailed braced structure in Lanzhou has been carried out by using the genetic algorithms. Finally, based on circular sliding failure model with the stability safety factor are compared and analyzed, the results show that the calculation method and search the validity of the method, and provide a reference for design work.