Bridge pier pre-embedding construction process based on drilling method

The invention relates to a bridge pier pre-embedding construction technology based on a drilling method, and belongs to the technical field of bridge pier drilling methods. Comprising the steps that firstly, a steel sleeve extends into the water bottom, the bottom of the steel sleeve and the water bottom are sealed, the steel sleeve is fixed in the water, and the steel sleeve is rapidly assembled through an intermittent dislocation assembling method; 2, adding water-insoluble slurry of which the density is greater than that of water into the steel sleeve, and extruding the water in the steel sleeve by utilizing the slurry; thirdly, drilling is conducted downwards along the inner space of the steel sleeve through drilling equipment, so that part of slurry is extruded out, and after drilling is conducted to the target depth, a base hole channel is formed; fourthly, the keel is placed along the base hole channel, and the keel is fixed in the base hole channel; according to the bridge pier pre-embedding construct