| 摘要 |
PURPOSE:To make easier excavation and the driving of adjacent piles by a method in which a pile having a fitting groove formed axially in one direction of its periphery and an earth auger provided with a vibration stopper of a shape fittable into the fitting groove are used. CONSTITUTION:Parts of the vibration stoppers 3a and 3b of an earth auger 8 are fitted into the fitting groove 5 of a pile 4 penetrated into the ground. The earth auger 8 is turned downwards and cement milk is jetted from the excavating bit 11 to form an excavated point 12, and the excavated soil and sand are mixed by agitating blades 2a and 2b to form a soil cement 13. The earth auger 8 is pulled up, and then the projected line 7 of a new pile 4 inserted along the fitting groove 5 of the pile 4 already penetrated in such a way as to make the height of the new pile 4 coincide with the 4 already penetrated adjacent pile 4. Both of the piles 4 are connected with the soil cement 13. |
