Patent ID: 6332303
Filing Date: 2001-12-25
Classification: E02D,E04H

Abstract:
A method of building an underground structure using concrete columns to be vertically installed at corners and at positions between the corners and concrete panels to be fitted between adjacent concrete columns, the method comprising the steps of:determining positions for installing the concrete columns, and digging a trench for burying a guide used for the concrete columns;drilling holes for burying the concrete columns in the trench, the holes being deeper than a level where the concrete panels are placed;assembling the guide, the guide being composed of outer and inner frames, and guide members for burying the concrete columns;installing the concrete columns in the trench along the guide, and filling concrete in the holes to fix the concrete columns in the holes;removing the outer frame of the guide;deepening the trench, digging an area for the underground structure, and fitting the concrete panels between the concrete columns;installing a reinforcing metal beam using concrete on the concrete columns and the concrete panels to prevent the concrete panels from projecting inward due to ground pressure; andremoving the inner frame of the guide after the concrete of the reinforcing beam is solidified.