Analysis of A New Grouting Method for Pipe Implanted Pile

Advantages and disadvantages of various pile foundation construction are analyzed, and the advantages and feasibility of a new grouting method for pipe implanted pile are proposed based on the successful case of grouting into pile and column in a certain integrated pile and column project. Based on basic principles of fluid mechanics, the rationality and feasibility of the new grouting method are demonstrated, and the operation mechanism and construction technology of the new grouting method are expounded. By virtue of the characteristics of pipe pile and the advantages of drilling machinery such as rotary excavator, this method can solve the problems of pipe pile foundation construction in hard rock stratum (especially in karst area), such as the difficulty in drilling holes and the large filling coefficient of concrete mortar. This method simplifies the pressed or hammer process in the pipe implanted pile method, and also enlarges the application scope of big pipe pile (over 1.30 m in diameter) in implanted pile. The implanted pipe pile is simple, economic, practical and environmental, and could provide basis for the popularization and application of pipe pile in hard rock, especially in karst areas in the future.