Swing spraying pile anchor rod construction method

Abstract

The invention relates to a swing spraying pile anchor rod construction method in the field of geotechnical engineering anchoring. The swing spraying pile anchor rod construction method includes the steps of firstly, determining an anchoring position; secondly, enabling a rod body to be connected with a drill rod, forward pushing the drill rod into soil mass along with the rod body, and enabling the rod body to be disengaged from the drill rod when the drill rod is drawn back; thirdly, inputting high-pressure liquid into the drill rod, spraying the high-pressure liquid into the soil mass through a high-pressure spraying nozzle arranged on a drill bit, pushing the drill rod into the soil mass while enabling the drill rod to repeatedly swing in the forward direction and the backward direction around the central axis of the drill rod, and completing swing spraying pile construction in an anchoring section position of an anchor rod; fourthly, enabling the drill rod to be separated from the rod body, taking out the drill rod, placing the rod body between a swing spraying pile and the soil mass, and entering an anchor rod maintenance period; fifthly, locking the rod body, and entering an anchor rod use period. No holes need to be formed in the anchor rod, the rod body such as a steel pipe, a steel rib and a steel strand can be arranged into an anchoring body while the swing spraying pile is constructed, the construction speed is high, the manufacturing cost is low, and the swing spraying pile anchor rod construction method can be widely applied to the field of engineering such as foundation pit supporting.

Description

technical field [0001] The invention relates to the field of geotechnical anchoring engineering in the field of civil engineering. Background technique [0002] With the rapid development of engineering construction, especially the development of underground space, the demand for anchor rods in engineering construction such as foundation pit enclosure and slope support is increasing. At present, the anchor rods of jet grouted piles have been widely used. However, when the rotary grouting pile anchor is formed, because the drill pipe is always in a single direction of rotation, when the rod body is a flexible structure, such as using steel strands as the rod body, the rod body can be brought into the soil by the rotary grouting pile drill pipe , the construction is more convenient. However, when the rigidity of the rod body is large, such as using a steel pipe as the rod body, or using a recyclable anchor rod as the rod body, it is difficult to install the rod body while con...

AI Technical Summary

Problems solved by technology

However, when the rigidity of the rod body is large, such as using a steel pipe as the rod body, or using a recyclable anchor rod as the rod body, it is difficult to install the rod body while constructing the rotary grouting pile because the rod body is easily twisted together with the drill pipe during construction. Inserted into the soil, in addition, because the section of the pile is circular after the pile is formed, the contact surface area with the soil is small, so the bearing capacity of the foundation soil has not yet been fully utilized