Application of Geotechnical Investigation Techniques in Construction of Prestressed Pipe Pile in Collapsible Loess Area in North China

Effect in the construction of large area prestressed pipe pile can make near completed pile or building produce displacement,this phenomenon is common in soft soil area in the south,but the collapsible loess area is very rare in the north.This article through to the collapsible loess region,the analysis of the survey report of a certain power plant in Shanxi Province,find out the prestressed pipe pile construction in adjacent has been built based on boiler room of pile foundation construction completion and the cause of the displacement of pile caps,put forward a variety of solutions,and recommend using slope unloading,adjusting the construction sequence and comprehensive treatment methods to slow down the speed of construction,effectively solve the problem,to prevent the project quality accident.This method is of great significance to the engineering of geotechnical engineering in solving the technical problems in geotechnical construction.