Hangzhou Qianjiang New City Block Deep Foundation Structure Design And Monitoring Analysis

With the rapid development of China’s economy, deep foundation pit engineering have sprung up one after another, especially for the old on a large number of reconstruction engineering of foundation pit engineering complexity and a step, excavation engineering want to consider the safety of foundation pit engineering in itself, but also the construction process on the surrounding land displacement, settlement of buildings, etc., so in the center of the city is the most important thing for foundation pit design of foundation pit deformation control of the demand is higher and higher, the traditional way to strength the design of the control design need to make some changes.This paper based on the hangzhou qianjiang new city blocks in some typical site engineering geological investigation report, organize the related engineering geological data, and access to relevant information, documents, systems analysis summarizes the geological structure characteristics of hangzhou qianjiang new city blocks, foundation soil information and features and deep foundation pit design mainly relates to the foundation soil parameters value and the situation of groundwater types and buried depth, and the evaluation of the groundwater corrosion, etc.Secondly, this paper, by using finite element program ABAQUS China life of construction project in hangzhou qianjiang new city area, such as excavation and supporting of foundation pit for 2 d and 3 d elastic-plastic finite element simulation analysis, studied in hangzhou qianjiang new city blocks using underground continuous wall with reinforced concrete supporting system in the process of step-by-step excavation of foundation pit supporting, supporting structure, surface subsidence displacement condition changes, strut axial forces, etc., and comparing the calculation results and principle is deep foundation pit software research, and discusses the two-dimensional model and 3 d model calculation results for engineering design.This paper studied the measured in the process of excavation of horizontal displacement of retaining structure, surface subsidence, strut axial forces, underground water level changes. Study found that in the process of excavation, the surface settlement and horizontal displacement of retaining structure, strut axial forces change with depth of foundation pit excavation of underground water level, has its own laws, and the 3 d model calculation theory results are basically consistent, monitoring values are within the scope of the alert value, the end of the project safety and.