METHOD FOR CONSTRUCTING COMBINED MICROPILE FOR PRETENSION RECEIVING COMPRESSION AND TENSION

摘要

The present invention relates to a method for constructing a combined micropile for pretension receiving compression and tension. More specifically, an extendable inner lower body is installed at a lower end of a combined micropile and a nut and a plate for pretension are installed on an upper portion of the combined micropile during the construction of an underground structure, thereby being able to act as a buoyancy anchor to resist buoyancy. The method comprises: a perforation step of drilling perforated holes; an extendable anchor body insertion step for forming an extendable lower inner body, connecting a rod thereto, and forming a protective plate at a front end thereof; a pretension preparation step of installing a hydraulic jack after connecting a pretension support to the upper surface of a pretension plate; a pretension application step of bringing the pretension plate into contact with the ground; and a grouting step of injecting grout.;COPYRIGHT KIPO 2016