| 摘要 |
PURPOSE:To easily perform Benoto piling work by a method in which bentonite is electrically adhered to the periphery of a Benoto casing held by a chucking device and a rocking device in such a way as to enable the Benoto casing to be easily drawn out or penetrated. CONSTITUTION:A Benoto casing 2 is held by a chucking device 1 and penetrated into the ground by driving a rocking device 3. The rocking device 3 is stopped, soil in th casing 2 is excavated, and electric circuit is flowed between the periphery of the casing 2 and a ringed cathode 6 to cause bentonite 8 to adhere electrically to the periphery of the casing 2. The penetration of the casing 2 and the adherence of bentonite are repeated, concrete is placed into the casing 2, and the casing 2 is pulled out by operating the rocking device 3. The friction between the casing 2 and the inner wall of the hole becomes smaller and the Benoto piling work can thus be easily performed. |
