CIVIL ENGINEERING MACHINE OPERATING IN WATER

PURPOSE:To drive a driving section by a power source independent from the power source on the ground in a pile hole. CONSTITUTION:A top bit 13 is mounted to the lower end of a body pipe 12 fitted to a drive pipe 11, a bottom widening guide 15 is mounted around the body pipe 12, and a bottom widening bit 17 is mounted to the bottom widening guide 15. Hooking and unhooking claws 21 capable of being loaded and unloaded by motor cylinders 22 are mounted to circular grooves 20a and 20b provided to the drive pipe 11 of the upper part of the body pipe 12, and a holding plate 24 loaded and unloaded on the excavated surface S of the top bit 13 by a motor cylinder 23 is mounted to the lower part of the body pipe 12. Power is supplied to the motor cylinders 22 and 23 by a waterproofed battery 28 through electromagnetic switches 25 and 27. Command signals through the water from the ground are received by a receiver 26 through a receiving antenna 30, and the motor cylinders 22 and 23 are driven to operate the hooking and unhooking claw 21 and holding plate 24.