Study on Measures to Retain the Deep Foundation Pit for Soil-Rock Composition with Weak Intercalated Layers
Aiming at a deep foundation pit in soil-rock composition with weak intercalated layers, in this paper, using the limit-balance method and finite element method to analyze the stability and deformation. The safety factor of foundation pit under the absence of retaining is much less than 1 through the limit-balance method, but through some retaining measures can guarantee its safety. According to the excavation of the foundation pit in special geological conditions, it takes pile-anchor retaining structure in upper and soil nailing in the lower part. Using the finite element to carry out dynamic simulation for the whole project, the results show that: this form of retaining can be very good to ensure the excavation of the foundation pit in the geological conditions, and it may be helpful for similar projects