Cement-soil Mixing Pile Supporting Structure Optimization And Stability Impact Analysis

Since the silt soil layer with large thickness,poor soil quality have strength loss obviously under the influence of water,so in the ultra thick muddy soil foundation pit supporting structure design is difficult to do a good job of.Foundation pit engineering in soft soil area,is easy to produce the problem such as excessive displacement of supporting structure and even instability,if the improper selection of foundation pit supporting structure or supporting method and the supporting measures is not reasonable,in the heart of the foundation pit construction process prone to accidents,losses to people's life and property.So in this paper the design of soil-cement mixing pile supporting structure optimization and stability influence factors of the research has important practical significance.This paper,taking Dalian Harbor City issue of E-60 foundation pit supporting project as the background,the ultra thick muddy soil of foundation pit supporting is studied,the main research contents and results are as follows:Through the Foundation support programs as well as two original optimization simulation analysis and comparison,this paper summarizes the post-excavation retaining wall lateral displacement,surface subsidence and upheaval in the bottom rear wall deformation law.Comparative analysis of the pit slope soil unloading and the bottom of the pit soil reinforcement two measures on the original excavation retaining wall and soil displacement size as the original pit optimization support programs provided.It also studied the impact on the surrounding excavation piles explore the variation of displacement piles.In addition,the paper of the excavation monitoring data analysis,monitoring values obtained with different monitoring points and showing excavation of law,and to make a comparative analysis with the simulation results.Optimization model based on the original proposal,the paper also studied the cement soil retaining wall embedded depth,mixing pile row number,floor overloading,Bottom reinforcement depth and other factors on deformation of deep excavation.Discusses the general variation under the influence of various factors,deformation features include lateral displacement of the variable pit top cement walls,the maximum surface subsidence and uplift of the bottom of the pit.