Construction method for pulling trapped cutting box body of TRD construction method pile machine

The invention discloses a construction method for pulling a trapped cutting box body of a TRD construction method pile machine, and aims to provide a construction method capable of effectively improving the pulling and escaping capability of the cutting box body of the TRD construction method pile machine and pulling up the trapped cutting box body of the TRD construction method pile machine. The construction method adopts a back shore support and a pulling device for construction and sequentially comprises the following steps that A, soil bodies around a cutting box body are preliminarily separated, and a high-pressure jet grouting pile machine is adopted for jetting mud doped with bentonite to the soil bodies around the cutting box body from bottom to top; b, a back shore support is installed, and the back shore support is fixed to the top of the cutting box body through bolts; a vibratory hammer is installed, and the vibratory hammer is fixedly installed on the back shore support; a pulling device is insta