Research On The Principle And Design Of Borehole Cast-in-place Pile And The Construction In Deep Excavation Next To Metro Station

On the basis of the analysis of the theory and the practical data , this paper is mainly aimed at the related construction technics and construction method of the borehole cast-in-place pile which is fit for the shanghai city, and it includes the management and the remedy measures when faced the construct accident. The paper investigate the design methods and calculation ways of the borehole cast-in-place pile;and it investigate the rule of the bearing force and distortion of the borehole cast-in-place pile. Considering the similarity of the bearing force and distortion between the borehole cast-in-place pile and other beleaguer structure, comply with the practical data, the paper investigate the distortion of the surrounding soil after the piles distort in order to find out the design ways and calculation means. It also aims at the effect of the borehole cast-in-place pile on the terms of environment protection. It analyze the effect of the borehole cast-in-place pile to the surrounding environment among the construction of the borehole cast-in-place pile and the effect to the MINGZHU line for using now. The paper is also aimed at the analysis of economy between the borehole cast-in-place pile and other structure. Moreover, it aims at confection of the super slower solidification concrete , and the key of quality control ,and the test ways of the super slower solidification concrete for the Shanghai city.