| 摘要 |
PURPOSE: A compact for hardening the ground is provided to enhance the efficiency of ground hardening and to minimize the vibration of a body by transmitting the rotational force of an eccentric cam of a hydraulic motor to a roller of a piston tube and by combining a support rod having a spring with an upper plate connected with the body and an excavating rod. CONSTITUTION: Excavating rods(1,1') of an excavator transmitting an applied load to a body(7) to harden a soft ground by a hardening piece(6) with a piston tube(12) elevating vertically in a lower cylinder(17) of the body are connected to fixing devices(2,2'). An upper plate(3) and the body are fixed by many support rods(9,9') supported by springs(8) while forming a shock absorbing place(10) between themselves. A hydraulic motor(4) installed in a portion of the body is actuated to pressurizes a rotary roller(11) axially installed in the piston tube by an eccentric cam(5) axially installed in the hydraulic motor and rotating corresponding to the eccentricity. The applied load of the excavator is transmitted to the body via the upper plate. The piston tube descends vertically in the lower cylinder and the hardening piece pressurizes the soft ground. The surface of the body descends along the ground hardened in a certain inner pressure.
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