CAISSON TYPE PILE METHOD AND HANGING TOOL USED THEREFOR

摘要

PURPOSE:To prevent the exudation and outflow of back-filling grout, spring, underground water and earth by placing a grout tube equipped with an impregnate sleeve in spaces between a tail section of a vertical type shield excavator and lining material and between an upper bedrock of the tail section and lining material to grout. CONSTITUTION:A grout tube 6 provided with an impregnate sleeve 7 is horizontally hung by a suspended rope 9, and the grout tube 6 is provided across both spaces such as a space between a tail section 2 of a vertical type shield excavator 1 and lining material 3 and a space between an upper bedrock 10 of the tail section 2 and lining material 3. After that, the grout tube 6 is wound over the whole peripheral surface of the lining material 3 in the shape of a ring, and the impregnate sleeve 7 passing through a grout hole 4 is pulled out to the center 13 side of a vertical shaft. After a grout 11 is poured into the grout tube 6 from the impregnate sleeve 7, the space between the bedrock 10 and lining material 3 is filled with a back-filling grout 12. According to the constitution, the outflow of spring, etc., can be prevented.