The Application And Research Of Long Spiral Drill Hole Grouting Concrete Piles In Deep Building Foundation Pit

Long spiral drill hole grouting concrete piles are widely used in northern China, and made a great contribution to the Beijing Olympic venue construction, the new method has obvious advantages of simply process, operability, short construction period, low cost, and environmental pollution, with good economic and social benefits. However, it has not been a good promotion in the South of China, whether the new technology promotion can be smooth in the southern of china, is its performance able to fully meet the complex geographical environment of the southern, it is very necessary to analyze the force performance of systematic theoretical.This article’s background is the CAPF apartment buildings deep Foundation Pit project construction monitoring, this project is the Nanchang area used for the first time long auger drill hole grouting concrete pile excavation support case. This article introduce long spiral drill hole grouting concrete pile construction methods and the advantages and disadvantages systematic, combined with a deep foundation engineering instance, focus on the long spiral drill hole grouting Concrete Piles Technology in deep foundation pit support engineering applications of Nanchang. Analyzes long spiral drill hole grouting concrete piles deformation law using SPSS data analysis software to establish the supporting piles deformation relationship, Deep Excavation alarm value to predictIn addition, use Beijing Lizheng Deep foundation design software for the initial simulated excavation, calculation supporting piles single pile deformation, compared with the excavation monitoring data to verify the construction monitoring data reliability and preliminary forecast Pit security and stability in the construction process. Also use MIDAS GTS finite element software create a foundation pit excavation three-dimensional model, the foundation pit excavation the partial excavation construction phase numerical simulation analysis, during the various stages of construction Bracing internal forces, deformation and around foundation deformation, to analysis the numerical simulation about the construction phase of this project deep foundation, research the law about Foundation force, displacement. At the same time, compare with the construction site measured data, get some valuable conclusions, in order to provide same reference for construction method design theory and calculation method for Long spiral drill hole grouting concrete piles, also provides some suggestions for the southern region to introduce the new method...