ASSEMBLING UNDERPINNING STRUCTURE USING CAST-IN PLACE MICRO-PILE AND ASSEMBLING BRACKET FOR PIER, AND CONSTRUCTION METHOD THEREOF

摘要

PURPOSE: An assembling underpinning structure using a cast-in place micro-pile and an assembling bracket for a pier and a construction method thereof are provided to prevent scour around the pier by mounting the cast-in place micro-pile around the pier and mounting the assembling bracket on the micro-pile, and to stabilize the pier by improving bearing force of soil. CONSTITUTION: An assembling underpinning structure comprises: bores formed symmetrically around a pier(P); a cast-in place micro-pile(30) inserted into the bore and installed under the ground; an anchorage part installed in the upper parts of reinforcing steel bars placed in the cast-in place micro-pile; plural assembling brackets(70) installed around the pier by being formed of the right-angled triangle by using an H-steel, provided with the horizontal plane connected by a bolt and the vertical plane connected by an anchor(40), and installed by connecting L-steels; non-shrinkage mortar poured and cured between the horizontal plane of the assembling bracket and the anchorage part, and the vertical plane of the assembling bracket and the pier; and ripraps(100) placed to prevent scour around the assembling brackets and the pier.