Construction method for immersed pipe cast-in-place pile

The invention relates to a construction method for an immersed pipe cast-in-place pile. The construction method adopts the technical scheme that an immersed pipe pile is piled into a foundation at first, a mixing pile machine is mounted in the position of the immersed pipe pile for piling when the immersed pipe pile is not solidified and formed after a steel pipe is pulled out, and then a mixing pile is withdrawn so as to form the immersed pipe cast-in-place pile. The construction method overcomes the disadvantages in an immersed pipe pile and a cast-in-place pile, and obtains a brand new pile. The construction method achieves the effects as follows: the advantages of the immersed pipe pile and the cast-in-place pile are exerted, the immersed pipe pile and the cast-in-place pile can achieve the synergy, and the pile with high strength is obtained; cost is saved, the method is simple and is easy to popularize and apply; and meanwhile, construction wastes can be utilized, so that better environmental protection