| 摘要 |
Excavation equipment for the construction of compaction piles comprising a tool mounted at the end of a drilling rod; the tool is constituted by a shaft (10) provided on its end with digging teeth (12) and with at least a plate (14) for collecting debris rotating between an open position during the excavation and closed during the ascent of the tool; screw means (17, 18, 17', 18', 20); the screw is of the type of at least two principles (17, 18, 20), in the upper part (20) fixed directly on the shaft (10) and in the lower part (17, 18) fixed on a cylindrical element (16) inserted on the shaft; the means for compaction (19) are positioned on the screw (17, 18) of the cylindrical element (16); the shaft rotates between two positions displaced between them, one corresponding to the excavation condition and the other to the ascent one; each of the at least two--principle screws of the shaft (20) constitutes the continuation of a corresponding screw (17, 18) of the cylindrical body (16) depending on the angular position of the shaft (10).
|
