The Application And Study Of FEM Numerical Analysis For Reverse Order In Constructing High Buildings

Along with the improvement of urban civilization, the development of construction techniques and the more and more rigorous requirements on building construction sites and environments, there are more and more underground construction projects that are adopting the reverse construction method to carry out underground constructions of deep foundation pit supports. Reverse construction technologies are able to better solve such problems as long foundation pit construction cycle, great influences on their surrounding environment and high supporting charges. And this has provided a practical and effective method for foundation pit constructions of urban multistory buildings and high-rise buildings, especially those old city reconstructions. From the perspectives of both theory and practices, there are still a lot of questions concerning the reverse construction methods required to be studied and explored. This involves providing reliable analytical means for reverse construction method so as to guide the whole reverse construction process, to determine construction schemes and construction procedure, to improve key construction techniques, to lower construction costs, to accelerate construction speed, to control problems occurred during the constructions, etc.Based on the introduction of designs of reverse construction methods, this dissertation calculates and analyzes some problems of the reverse construction methods, when combining engineering examples and applying FEM software, ANSYS. Its mainly research contents are as follows:â… . Brief introduction of application and development of reverse construction method in domestic and international construction engineering projects, its advantages and existing problems.â…¡. Introduction of an important component in the reverse construction method - designs and construction methods of underground continuous wall and intermediate supporting columns. â…¢. Analysis and calculation, through ANSYS and based on real engineering projects, of structural component internal force and distortion law under different construction conditions, so as to provide references for designs and constructions.