DE730986C - Device for the production of concrete place posts with a thickened base - Google Patents

Description

Device for the production of concrete piles with thickened Foot The invention relates to a device for the production of place posts made of concrete with a thickened base, consisting of a lost propelling point that is inserted into the propulsion pipe with its lower end.

The innovation is that a steel pipe is attached to the propulsion tip is connected, the one with the lower end of the propulsion pipe. annular, with not yet hardened concrete enclosing space to be filled, and that the in the Driving point anchored reinforcement protrudes into this space or the concrete filling.

This arrangement has the advantage that the 'Stahlrohrstiick' after your Loosen the pre-drilling drill from the lost one. Pile tip the concrete for the pile base holds together and thus ensures a uniform thickening of the pile base. The steel pipe and the concrete filling also make the pile tip t when it is driven in in the ground with greater certainty is held in place and further -through the reinforcement protruding into the concrete filling -a very strong connection achieved by driving point and pile shaft. Finally, the concrete filling forms an additional seal against the ingress of water and sludge into the jacking pipe.

Another embodiment of the invention is that the steel pipe section is provided with longitudinal slots of a known type, so that when tamping the in the pipe section located pile part together with the strips existing between the slots the reinforcement, which may be arranged within the pipe section, is pushed outwards will. In this way, the thickening of the foot is increased in a simple manner.

In the drawing, the invention is shown, for example, and although show: Fig. a left a cross section and right a view of the pile base in the initial state, d. H. before the whole thing is driven into the ground, Fig. 2 a cross-section of the pile base and the lower end of the pile shaft. after this these are connected to one another in the ground.

The pole base or tip consists of a previously manufactured one Concrete body i. which is arranged in the lower part of a steel pipe section 2 and forms a whole with it. This foot has a on the upper side Well or a hollow part, which from the upper part of this pipe section and a slightly recessed bottom part is formed in the concrete body i. The wall of this recessed Bottom part is formed by a pipe section 3, in which the lower end of the Jacking pipecs q. fits. The pipe section 2 is level with the upper edge of the concrete body i and above provided with reinforcement bands or rings 5 and 6. Between these Bands 5 and 6 are provided in the pipe section 2 longitudinal slots 7. In the space between the jacking pipe q. and the pipe section 2 is a longitudinal reinforcement anchored in the body i 8 arranged, surrounded by the transverse reinforcement forming open clincher 9. Diescr Space is filled with fresh concrete before the foot is driven into the ground and closed on the upper side by an annular cover piece io. This Cover piece is provided with a bayonet slot i i in which a projection 12 engages on the propulsion pipe.

The bars of the longitudinal reinforcement 8 are inserted through holes in angle iron, which are attached to the inner wall of the pipe section 2. Also on the inside of the pipe section 2 ribs 14 attached by welding or in some other way, the serve to center the pipe section 2 and the propulsion pipe against each other.

Before starting the ramming and before or after, if necessary, the reinforcement of the shaft, which is indicated by 15 in Fig. so that a solid plug of concrete forms. This plug drives the foot i into the ground during further ramming and takes the propulsion tube q through friction and its own weight. until the desired driving depth is reached. Thereupon the propulsion pipe is pulled up over: a certain height; q, whereby the foot remains in its position. Then the concrete plug 16 is driven out of the driving pipe and a new amount of concrete is refilled and tamped down, whereupon the driving pipe is pulled up again and the new concrete plug is driven out. These processes are repeated until the lower end of the propulsion pipe has reached the upper end of the pipe section 2.

If the pipe section 2 is provided with slots 7, they are thereby formed metal strips when tamping down the protruding from the driving pipe Concrete bend outwards and assume the shape shown in Figure 2. Simultaneously the longitudinal bars of the reinforcement 8 are bent accordingly, while the Tire 9 yield to this movement.

After the propulsion pipe has reached above the pipe section 2, becomes the remainder of the stake shaft in the above. described, by the way, well-known way manufactured.

Claims (3)

PATENT CLAIMS: t. Device for the production of cheek posts Concrete with a thickened base, consisting of a lost propelling point, into the the propulsion pipe is mounted or inserted with its lower end, characterized in that that a piece of steel pipe (2) is connected to the propulsion tip, which is connected to the lower end of the driving pipe an annular, with not yet hardened concrete enclosing space to be filled, and that the reinforcement anchored in the propulsion tip protrudes into this room or the concrete filling. 2. Device according to claim i, characterized in that the steel pipe section (2) with longitudinal slots is known Kind is provided so that when tamping the pile part located in the pipe section the strips present between the slots together with the optional Reinforcement arranged within the pipe section can be pressed outwards. 3. Device according to claim i and 2, characterized in that the space between the propulsion pipe and the metal pipe section on the upper side of one of the propulsion pipe surrounding annular lid is closed.