| With development of engineering project,Defferent type of piles are being extensively used in architecture design and construction . At the same time,new pile types, job practice ways and machines are emerging .Ramming-reamed pile is one of the new types which appeared in Hangzhou of Zhejiang province in 1970's later.Ramming-reamed pile is popular quickly because of its fast construct ,high bearing capacity ,low fabrication cost of single pile and function of around process as a kind of pile with reamed base which is created from pipe-sinking cast-in-situ piles.This pile type isn't be used in construct field of Changchun .However ,In ShenYang ,which is in NorthEast zone ,ramming-reamed pile has been adopted in some engineering projects and gotten the better results than other pile types .So this paper wishes that ramming-reame pile is suited in Changchun too ,especially in YiTong Valley region of Changchun . Through design ,analysis and comparison between ramming-reamed pile and other pile types including concrete precast pile, pipe-sinking cast-in-situ piles,and manual-excavated pile etc by means of the Engineering Geology R- econnaissance Design Software ,the Common Pile Foundation Design Software and the Ramming-reamed Pile Foundation Design Software which are exploited by self.It comes out the notable result that ramming-reamed pile has more merts than other piles ,especially pipe-sinking cast-in-situ piles. The paper analyzes the form mechanism of ramming-reamed pile and actual engineering application ,expounds the design ideas between ramming-reamed pile and common pile types .Through combination with parties ,carry on the feasibility analysis of ramming-reamed pile in Changchun region .The paper's main content as follows;(1) Discuss the development of ramming-reame pile technology and research present state ,stress the ramming-reamed pile's merts .Comparing common pilet types in Changchun at present ,analyze the application prospect of ramming-reamed about pile foundations of tow or three class construction for study significance. Simultaneity,analyze detailedly ramming-reamed pile's applicability in Quaternary soil strata of Changchun and its application perspective.(2) Beacause ramming-reamed pile is a kind new pile with enlarged base developed from pipe-sinking cast-in-situ piles,it has different distinguishing feature than other common pile types .In the No.three part of this paper ,the mechanism and theory design model of enlarged base shaped is the subject .ultimately ,the total design idea and pile type structural design way come out .Meanwhile ,construction technology is explained in detail .(3) By means of Pile Foundation SoftWare , design project about foundation of the common piles which often used in Changchun zone and the ramming-reamed pile , analyze and compare with these the projects so as to educe data and charts of the different foundation project and simulate the three-space drawing designed about pile foundation in construction.(4) Make use of the finite element method to Analyze ramming-reamed pile foundation with strip cushion cap .The engineering geology background is the checking workshop of Changchun Henglin Company . it can be found about the scatter diagrams of the main stress field and the displacement filed .So the final settlement value of ramming-reamed pile foundation and the subjacent bed effected is gotten.The technology route of study includes Visual C++ language witch links Access DataBase technology and Visual Basic 6.0 language which combines Excel and AutoCAD second exploitation technology .By means of program design ,realize the function of the scientific calcalation and draft in Visual C++ compilation circumstance and functions of charts analysis and tridimensional engineering drawings about pile foundation through using Visual Basic language .Throught above analysis ,the paper educes that the foreground of ramming-reamed pile in Changchun region is very optimistic. This pile has many merits including saft,fast ,convenience ,economy...
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