Construction method of trestle steel pipe pile foundation

The invention discloses a construction method of a trestle steel pipe pile foundation. The construction method is used for performing anchoring construction for the trestle steel pipe pile foundation on a slope bare rock surface and a shallow covered slope rock surface of the river, lake or ocean. The construction method comprises the following steps: A10) after utilizing an anchoring system to accurately position a floating pilot hole platform, respectively guiding each trestle steel pipe pile to fall onto a river bed rock surface but not perform a rock anchoring, through each reserved hole position on the floating pilot hole platform; A20) after impacting a hole to a designed depth on a foundational bed rock surface in the trestle steel pipe pile by using an impacting drill with the diameter less than the inner diameter of the trestle steel pipe pile, vibrating the trestle steel pipe pile so as to guide the trestle steel pipe pile to sink to the bottom of the hole, pouring reinforced concrete and firmly con