Construction method for anti-floating anchor rod in Xigeda group silty-fine sand

The invention relates to a construction method for an anti-floating anchor rod in Xigeda group silty-fine sand, which comprises the following steps that S1, holes are formed, a drilling tool is used as a sleeve and used for central positioning, and the spacing distance of the formed holes is three times of the horizontal distance between hole sites of the anti-floating anchor rod under the action of hydraulic vibration; s2, an anchor rod is placed, and after the hole is formed to the designed depth, the machined anchor rod is hoisted into a drilling tool; s3, grouting and pipe drawing are conducted, specifically, cement slurry is injected into a drilling tool from bottom to top through a grouting pipe in the anchor rod, when the cement slurry level is flush with the ground, the drilling tool starts to be pulled out upwards at a constant speed, after the drilling tool is completely pulled out, hole bottom grouting continues, meanwhile, fine-grained pebbles are added, surface water overflows from a hole, and co