| 摘要 |
<p>The invention relates to a method for forming a hole in the ground, particularly for forming a foundation element or the like in the ground, wherein a hollow body, such as a tube, open at the lower and upper sides is urged into the ground, and the ground which has penetrated into the hollow body is removed from the hollow body by means of pressurized fluid which, after the hollow body has been brought to depth in the ground, is supplied into the hollow body near the lower side thereof and which presses the ground in the hollow body upwardly. According to the invention pressurized fluid, for instance bentonite is sprayed into the hollow body at a small distance above the lower edge of the hollow body out of spray nozzles, which open into the hollow body and lie at the same height and which are spaced about the circumference of the hollow body, whereby the sprayed pressurized fluid effect a cutting of the ground in the hollow body at the height of the spray nozzles, whereupon this pressurized fluid displaces the overhead ground column upwardly along some distance in the hollow body. The invention further relates to a hollow body, such as a tube, open at the lower and upper sides and adapted for use in the method for forming a hole in the around. According to the invention a plurality of spray nozzles open into the hollow body at a small distance above the lower edge of the hollow body, the center lines of the spray nozzles lying in one transverse plane of the hollow body spaced about the circumference thereof, whilst the spray nozzles can be connected to pressurized fluid supply through at least one line.</p> |
