The Study Of Information Control About Consturction Of Deep Founation Pit In Soft Soil

With the rapid development of urban construction, subway and senior projects is increasing day by day, a large number of deep foundation pit project emerged and highlights the mega scale, excavation of super deep, irregular geometric size, narrow space, the environment is complex and sensitive, and so on, resulting in the construction process of foundation pit deformation control difficulty increasing.The Yulong Financial Plaza deep foundation pit project as the basis, research on deformation of foundation pit construction technology for controlling the system. The main research contents are as follows:(1) Based on the existing foundation data, using the finite element software MIDAS/GTS numerical model was established, simulation of the foundation pit excavation, a nursing process in various working conditions under the supporting structure should stress, strain and displacement and surrounding ground settlement;(2) In he supporting structure of underground continuous wall construction process, forming a a set of key construction techniques, so as to and the integrity of the underground continuous wall rigidity is improved, to ensure the quality, in the foundation pit excavation and supporting structure in the construction process, the island excavation through the, hierarchical block, limited support, effectively reduced the influence of space-time effect on the excavation and control the underground continuous wall horizontal displacement and surrounding ground settlement value;(3) According to "according to the principle of need pumping, stratified precipitation, precipitation minimized and controlled by precipitation of tube well dewatering technology, strictly control the depth of precipitation, precipitation and reduce the impact on the surrounding environment;(4) Using a variety of means to excavation of foundation pit retaining structure deformation and the surrounding ground settlement were measured, on the basis of large amounts of data, through the process of BP neural network predicted in the construction of the foundation pit deformation, the establishment of safety evaluation model, the timely identification of foundation pit is in a safe state, realize the information to guide the construction.Through the above deformation control method of effectively controlling deformation of Foundation pit, ensure safe and reliable foundation.The research results of practical value of the thesis, and provides a reference for similar projects in Wuhan.