micro-pile boring casings pipe for one shot grouting

摘要

The micropile perforated casing pipe for simultaneous grouting according to the present invention includes: a casing pipe 100 inserted into the perforated hole during micropile construction; A connector 200 that is fastened and fixed to the casing pipe and configured to connect the other casing pipe in close contact with the casing pipe to each other; And, at least one screw 300 is installed and fixed to be spaced apart at a predetermined interval in the longitudinal direction of the casing pipe 100, and a perforated hole is formed in the ground. The connector 200 includes: a first flange 210 that is fastened and fixed to the lower end of the casing pipe 100, is formed in a hexagonal shape, and has a fastening hole 240 formed at each corner of the hexagonal shape; A second flange 220 formed in the same shape as the first flange 210 and in close contact with the other casing pipe 100 to which the first flange 210 is fastened; And, a fastening means 230 having a thread formed on an outer circumferential surface thereof so as to be screwed through the fastening hole 240 formed in the first flange 210 and the second flange 220, The connector 200 is formed recessed from the center of the first flange 210 and protruded downward, and is inserted into the insertion hole 221 formed in the second flange 220 to provide rotational power to the second flange 220. Including a connector 211 for transmitting, wherein the first flange 210 has a fixing fastener 215 inclined downward from an inner circumferential surface in which the connector 211 is depressed toward an outer circumferential surface of the connector 211 It is formed through and characterized in that the fixing member 260 is fixedly fastened to the fixing fastener 215. Accordingly, by using a connector connecting the casing pipe and the other casing pipe in the simultaneous grouting method of constructing the casing pipe and pouring concrete at the same time, it is possible to assemble and disassemble without additional cumbersome welding work, thereby reducing construction time It is possible to reuse the casing pipe without damage by simple disassembly. The connection pipe formed in the first flange is inserted into the insertion hole formed in the second flange and used, so that the casing pipe located at the bottom is generated by the rotation of the casing pipe. It is possible to withstand the rotational torque, and in particular, a portion in which a plurality of casing pipes are connected to each other is more rigidly fixedly connected by a fixing member fixedly fastened to the fixing fastener, so that the durability against rotational torque can be further enhanced.