DE2403473A1 - Concrete tubular pile - with steel tube reinforcement with bottom closed end and side wings - Google Patents

Abstract

The tubular concrete pile with steel pipe reinforcement has the steel pipe closed at its bottom end and there provided with perpendicularly outstanding side wings. Preferably the manufacture of the pile is conventionally ramming a smooth cylindrical steel pipe with lost tip into the ground, conventionally filling with concrete the hole left on withdrawing the pipe, and ramming a steel pipe as above into the concrete-filled hole, with the concrete not yet set. The wings penetrate into the ground surrounding the hole, and are planar, flat metal sheets. The concrete is pressed into the ground.

Description

Concrete pipe pile with steel pipe reinforcement The invention relates to a Concrete pipe pile with steel pipe reinforcement, with hardened concrete around a steel pipe is arranged, for example for the foundation of overhead line pylons.

A foundation pile with partial steel tube reinforcement is through the DT-AS 1 944 644 became known. This foundation pile contains in its upper Part of a steel pipe, which is tightly connected to hardened concrete with adhesive rings that is the rest of the part of the foundation pile, whereby the hardened concrete is steel-reinforced.

Furthermore, a foundation pile is known (DT-OS 1 634'47o), which from consists of a shaft body pipe around which the hardened concrete is arranged. The shaft body tube is made of spun concrete.

The known foundation piles have the disadvantage that the concrete is not pressed into the ground and thus the adhesion of the concrete to the ground is low. This has a negative effect on the load-bearing capacity of the foundation piles.

The invention therefore has the object of providing a concrete pipe pile with steel pipe reinforcement, in the hardened concrete is arranged around a steel pipe, to create in the concrete is pressed into the ground.

This object is achieved according to the invention in that the steel pipe closed at its lower end and at this lower end with vertically protruding Side wings is provided.

The invention has the advantage that when driving the steel pipe into a ground suitably prepared with concrete through the vertically protruding Side wing is given a guide and the concrete is pressed into the ground, whereby, after the concrete has hardened, a foundation pile is created opposite the one the known foundation piles has a higher load-bearing capacity. The higher one load capacity requires a longer service life and thus improved economic efficiency.

Embodiments of the invention are shown schematically in the drawing shown.

Figure 1 shows a longitudinal section through a foundation pile according to Invention, while in Figures 2 and 3 cross sections through this foundation pile are shown. In Figure 4 is a further embodiment of the steel pipe in side view shown.

According to Figure 1, the steel pipe 3 is at its lower end with a Tip 10 made of sheet steel closed. The tip 10 is here with a ring 8 connected, which in turn is connected to a steel tube 3. As an axis of symmetry the interrupted straight line 12 is drawn in FIG. 1, the lines 4 and 5 indicate to us indicates that the foundation pile is drawn interrupted in its longitudinal direction. At the lower end of the steel tube 3, side wings 6 and 7 are shown.

As can also be seen from the cross-section C-D according to FIG. 3, there are two further side wings 301 31 present, the four side wings advantageously are designed as flat, flat sheets and to the steel tube 3, for example are welded on. In Figure 1, hardened concrete surrounds 2 steel pipe 3 and side wings 6, 7, the transition surface hardened concrete 2 "soil 1 as a wavy line 29 is drawn. Furthermore, the positions of the cross-sections through A-B are shown in FIG and C-D indicated. The pile shown in Figure 1 is now manufactured in the manner that in a known manner a well-known smooth, cylindrical steel pipe with lost top is rammed into the ground, with the subsequent pulling out of the steel pipe and simultaneous vibrating process with the help of internal vibrators, the resulting cavity is also filled in a known manner with concrete and then a steel pipe 3, which is closed at its lower end 10 and at this lower end with perpendicular protruding side wings 6, 7, 30, 31 is provided, in these with not yet hardened Concrete-filled cavity is rammed, the side wings 6, 7, 30, 31 as guide plates to serve. The fresh concrete of the cavity is pressed to the side and very strong condensed. In addition, the closed steel pipe 3 presses with its side wings 6, 7, 30, 31 when driving the not yet hardened concrete onto and into the surrounding area Soil 1.

When the concrete 2 hardens, there is an intimate connection between Concrete and soil, which are particularly beneficial to the load-bearing capacity of the piles identifies. A prerequisite for this is a suitable composition of the concrete in relation to on cement quantity and consistency, for example: 360 kg cement per m3 fresh concrete, Gravel sand according to grading curves (DIN 1045) and water up to consistency K 3 (DIN 1045).

The outer diameter of the steel pipe with lost tip can, for example 42 cm, that of the lost tip 50 cm. For the steel pipe 3, for example 32 cm outer diameter can be provided, the wings 6, 7, 30, 31 forming a circle with a diameter of 54 cm. In Figures 2 and 3, their symmetry is through interrupted straight lines 13 and 14 clarified. Another embodiment is drawn schematically in Figure 4 by advantageously using this as angle iron 16, 17, 18, 19 are formed, which under the lower end of the steel pipe 3 to a tip 28 are combined and perpendicular to the steel tube 3 baffles 24, 25, 26, 27 are attached to this. The steel pipe 3 is at its lower The end is closed by a welded-in plate, which is indicated by the line 15 is. This tip is advantageous to use on softer floors, where the concrete is pressed even further radially into the 'surrounding soil.

Claims (4)

Claims 1. j Concrete pipe pile with steel pipe reinforcement, in which the hardened concrete is arranged around a steel tube, d u r c h e k e n n n z e i c h n e t that the steel tube (3) closed at its lower end (10, 15) and at this lower end End is provided with vertically protruding side wings (6, 7, 30, 31). 2. A method for producing a pile according to claim 1, d a d u r c h g e k e n n n n z e i c h n e t that in a known way a known smooth, cylindrical steel pipe with a lost tip is rammed into the ground, whereby when the steel pipe is then pulled out, the cavity formed in also known way is filled with concrete and then a steel pipe (3), which is closed at its lower end (10, i5) and at this lower end is provided with vertically protruding side wings (6, 7, 30, 31), in these with Not yet hardened concrete-filled cavity is rammed, with the side wing (6, 7, 30, 31) penetrate the soil surrounding the cavity. 3. Post according to claim 1, d a d u r c h g e k e n n z e i c hn e t, that the side wings (6, 7, 30, 31) are designed as flat, flat metal sheets. 4. Post according to claim 1, d ä d u r c h g e k e n n z e i c hn e t, that the side wings are designed as angle irons (16, 17, 18, 19), the below the lower end of the steel tube (3) to be combined to a point (28) and over baffles (24, 25, 26, 27) which are perpendicular to the steel tube (3) are attached to the latter are. L e r s e i t e