Micropile with improved horizontal force, compressive force and pull-out resistance using hollow bar and construction method thereof

摘要

Disclosed are a micropile using a hollow bar and a construction method thereof, using a hollow bar having improved resistance to horizontal force while maintaining resistance to an existing vertical load, and a construction method thereof. The present invention is a plurality of hollow bars are formed in the longitudinal direction, the protrusions are formed at a constant pitch on the outer peripheral surface; a drill bit coupled to the front end of the hollow bar, a discharge hole communicating with the hollow is formed, and having a diameter greater than an outer diameter of the hollow bar; a coupler having a groove corresponding to an outer circumferential surface of the hollow bar to connect the plurality of hollow bars; An anchor plate coupled to the head of the hollow bar; and a horizontal force improving member comprising a casing bracket that is annularly fastened or joined to the outer circumferential surface of the hollow bar in the horizontal resistance section calculated in advance, and a casing that is externally inserted into the hollow bar and is seated or joined to the upper portion of the casing bracket; Provided are a micropile with improved horizontal force, compression force and pull-out resistance using a hollow bar, and a construction method therefor.