GROUND GROUTING METHOD BY CONTROL OF GROUT FLOW DIRECTION BY USING VACUUM DRAINAGE

摘要

PURPOSE: A construction method of a block type underground grout structure by grout injection direction control using vacuum drainage is provided to prevent the loss of grout caused by the flow of subsurface water. CONSTITUTION: A construction method of a block type underground grout structure by grout injection direction control using vacuum drainage is as follows. Injection holes(10) and vacuum drain holes(20) are bored at certain intervals. The vacuum drain holes are made into vacuum state while injecting grout into the injection holes, thereby leading the grout injected into the injection holes toward the vacuum drain holes. Bulbs(30) are formed by the grout which flows from the injection holes toward the vacuum drain holes. Grout is injected in the vacuum drain holes so that an underground grout structure is formed.