Deep Foundation Pit Deformation Analysis Based On Midas/GTS Coal Unloading Slot

China’s modernization emerged more and more large-scale projects, in which there are a lot of deep foundation ditch project even ultra-deep excavation and security and stability of the entire excavation project of great significance. Settlement monitoring during construction excavation pit for security and stability has an important role in evaluating and forecasting, some large excavation project was the result of accidents, many of which are due to excavation and support in the process of monitoring the work has not been done. Settlement Foundation at home and abroad has already been a lot of research, including some successful, have a profound effect on the actual project. The main contents of this paper are:(1) Summed up the deep excavation and research aspects of the deep foundation, and then discusses the necessity of monitoring deep foundation ditch project work, laying a foundation for this study;(2) It describes the construction process deep dit deformation characteristics of soil, and analyzes the impact force of excavation of deep foundation pit in the soil and the deformation of the supporting structure and the different stages of construction on nearby buildings;(3) Combined with deep foundation ditch project Xianyang area, identifying possible measurement scheme according to the construction design requirements and specifications for the construction site soil, supporting structure and so timely and accurate measurement;(4) Organize field data, analysis settlement laws, the monitoring and control values contrast alert, to determine the existence of security risks in the project area, the prevention of destabilizing incidents foundation;(5) Introduction Midas numerical simulation software Shaanxi Xianyang background of deep foundation ditch project using Midas/GTS numerical simulation analysis;(6) The simulation results and the measured data were analyzed through comparative analysis shows that the construction status model can better reaction engineering.The results show that:Foundation soil settlement with the construction progress of the total amount of change continue to accumulate and gradually become smaller, rain can cause excessive subsidence monitoring points, so the rain to construction work in the role of security; Intermediate position during the excavation pit are more prone to the long side of the settlement, the frequency of monitoring should be strengthened in the region; Displacement piling showed the value of displacement at the top of large and small parts of the lower displacement characteristics; Foundation pile displacement in different locations, at the corner pile displacement is relatively small, in foundation design be distinguished according to different design layout position; By actually measuring the value of the data and the theoretical model calculation results obtained comparative analysis model that can react practical engineering.