DE8607902U1 - Angular slope stone made of concrete - Google Patents

Description

The innovation relates to an angle slope stone made of concrete according to the generic term of the visual protection claim 1.

It is used to support ground or higher traffic areas known, retaining walls made of prefabricated and side-by-side angular embankment stones to produce that take over the pressure of the soil held by them and possibly the traffic areas provided on it Location are. There were a number of such L-shaped angle embankment stones proposed, which are adapted to the height of the slope to be intercepted (DE-GM 81 31 108 or DE-OS 32 32 799). It was for the sake of Firmness has always taken the view that such angular malignant stones must be made of reinforced concrete, especially if a relatively high embankment is intercepted with a row of stones should be and a traffic area above the ground behind the retaining wall is located and thus a relatively high traffic load is effective on the backfill. The L-shaped transition area is particularly at risk viewed from the wall disc to the base disc, which is

special

Special reinforcement measures are usually given additional strength should, By providing reinforcement, additional costs arise on the one hand for the production of the reinforcement cage and on the other hand because of the fixation of the reinforcement cage in the form, so that the individual bars of the reinforcement cage are sufficiently and evenly covered with a layer of concrete.

The innovation is based on the task of finding measures to angle embankment stones to be able to produce inexpensively from concrete without reinforcement, which has at least the same strength, but preferably a higher strength

wedge "Is reinforced angle'uösOhüfigSSieifie lift, whereby it is ensured that s

when manufacturing, especially when setting the concrete, none of the strength |

or the tensile strength impairing hairline cracks arise. j | 1

This problem is solved by the characteristic of claim 1. $

In the case of such an angle embankment stone made of non-reinforced concrete the transition of the plate web into the wall washer and into the base plate is designed to run continuously with such a radius of curvature, that the plate web merges smoothly into the wall washer and the foot disk in all areas, and on the other hand the foot disk and the wall disk also connect softly to one another, transitioning into one another. This means that "

Avoid sharp edges and corners, from which experience has shown hairline cracks that occur especially when the material thicknesses that merge into one another are very different, i.e. the thickness of the wall washer as well as the base plate and the plate web differ greatly from one another.

Therefore, the innovation also provides that the wall thickness of the wall washer |

between 0.8 and 1.3 times the wall thickness of the plate web in order to prevent volumetric accumulations of concrete that lead to temperature differences during setting due to the uneven dissipation of the setting heat lead, which can trigger the hairline cracks mentioned. For this reason it is also provided according to the innovation that the radius of curvature is preferably about 10 cm, whereby the concrete

BW35G-3063 volume

Volume also in the transition area between the plate web and the filler washer or base disk can still be kept small enough to ensure even cooling during setting and thus the development of Avoid tensile stresses causing hairline cracks. With such a Radius of curvature the necessary compromise is made, with the one hand by providing a sufficiently large radius of curvature a high flexural strength of the concrete in the transition area is ensured, and on the other hand by a sufficiently small radius of curvature too high Mass accumulations are avoided in order to avoid uneven cooling and thus the development of hairline cracks in the transition area.

With an angle slope stone manufactured according to the innovation below Using a concrete grade B 35, it was possible to determine through tests that the breaking strength of such an unreinforced angled embankment stone was reduced was a factor of 8 and more higher than with an angled embankment stone of the same dimensions with a conventional reinforcing steel reinforcement.

In the interest of a mass distribution that is as uniform as possible, the wall thickness should of the wall was between 0.8 and 1.2 times the wall thickness of the plate web. For the same reason, the wall thickness should the base plate in front of the curved transition area to the wall plate between about 1 and a maximum of 1.4 times the wall thickness of the wall thickness. In the interest of an even mass distribution should in the case of a wall thickness of the base disk in the upper limit area, too the wall thickness of the wall washer and the plate web can be shifted accordingly to the upper limit area.

In order to inhibit the progress of the crack in the event of an overload and to open the crack in To redirect an area that does not guarantee the wall washer will collapse immediately, provision is also made for the plate web to be conical from top to bottom to train ,,

In the case of corner stones that are relatively large in width, the innovation to avoid extremely different volume masses before that several Plate webs are provided next to one another, the ratio of the clear distance side edge / plate web: plate web / plate web being 11: 2.

BW35G-3063

advantages

■ a · «

Advantages and features de? Innovations also result from the following Description of exemplary embodiments in connection with the claims and the drawing * It shows:

Fig. 1 shows an L-shaped angle slope stone according to the innovation

in perspective view;

FIG. 2 shows a section along the line II - II in FIG. I; FIG.

? ig. 3 is a perspective view of a wide angle slope stone with two plate bars.

According to FIG. 1, the angled embankment stone 10 consists of a wall washer 11 and a foot disk 12 extending away from it in an L-shape. On the inside of the wall and foot disks adjoining one another in an L-shape, a is perpendicular Arranged to both disks extending plate web 14, which runs continuously with a radius of curvature r in the wall washer and the Foot disk passes. In the preferred embodiment, the radius of curvature r is 10 cm for all transition areas between the plate web and the wall and foot disks. The same radius of curvature is also provided in the transition area 16 of the wall washer into the base washer, so that a spherical corner formation between the three angled to each other standing disks. With such a radius of curvature, the wall thickness of the plate web and the wall washer is also 10 cm,, 'o against the foot disk has an average thickness of about 11 cm. The foot disk tapers towards the rear from around 12cm to around 10cm. This vote of the dimensions on each other has the effect that in the transition area between the plate web and the wall plate or the base plate there is no too large Concrete accumulation results, which cools down much more slowly than the outer edge areas of the angle slope stone when setting. So be Temperature stresses avoided during the setting process. The selected radius of curvature is therefore small enough to avoid undesirable accumulations of concrete volume to be avoided in the transition areas, but also large enough to ensure a smooth, continuous transition that is suitable for the The desired high flexural strength of the concrete is required to prevent it from tearing off when installed, even with high breaking loads.

BW35G-3063 by

The formation of the transition area between the wall washer and the footplate on the one hand and the transition area at the corner point between the three vertically one above the other, in order to prevent the formation of cracks in this most heavily loaded area, or in the event of overloading and tearing of the angle slope stone, the crack progression into the foot disk behind the curved transition into the Deflect wall pane. This course of the crack is achieved in particular by a conical design of the plate web, the wall thickness from above increases downwards between 10% and 25%. In the described embodiment the wall thickness is about 8 cm at the top and about 10 cm at the bottom in front of the transition to the foot disk.

Such a one made of unreinforced concrete according to the innovation Angled embankment stone is characterized by its particularly high strength. This has been shown through tests in which two angular embankment stones are the same Dimensions were compared, with a reinforced angled embankment stone was used without a plate web with a vault-like thickening in the transition area between the wall plate and the base plate and with a newly designed, non-reinforced angle slope stone was compared. The compressive load was expressed as a horizontal compressive force in 2/3 Applied height and led to a break at 9.2 kN in the reinforced angled embankment stone, whereas an embodiment corresponding to the described embodiment Angled embankment stone of the same size is broken with a horizontal force of 81 kN introduced at half the height.

When producing wide angular embankment stones according to the exemplary embodiment according to FIG. 3, two plate webs are provided in order to ensure the most uniform possible distribution of the concrete mass is given for the reasons mentioned above. Especially because of the expected cracking When the concrete mass sets, a plate web with a large wall thickness compared to the wall washer and the base washer and a corresponding one It is essential to avoid large radius of curvature.

The angular embankment stone according to FIG. ivt a width of 100 cm and a Wall thickness for the wall and the plate ridges from 8 to 10 cm, whereas the wall thickness of the foot disk is 12 cm and decreases to 10 cm towards the rear end. These dimensions are used for both angled slope

BW35G-3063 stones

stones of low height as well as relatively high angular gust stones up to P

intended to be 2 m.

The plate webs extend according to both an angular embankment stone Fig. 1 with a width of the wall washer of 50 cm as well as an angled embankment stone 3 with twice the width of the wall washer essentially over the entire depth of the foot disk and the entire height of the Wall washer, ensuring a smooth transition from the top edge of the wall washer and the rear edge of the base washer into the plate web should be.

When transporting the angular embankment stones, these are usually in a The center of gravity is suspended from the plate web. For this purpose, recesses or bores can be provided on the plate web. In order to there is no risk of damage to the plate web during transport, a longitudinal reinforcement is provided in the plate web that is able to take up its own weight.

BW35G-3063 Protection request

Claims (8)

Protection claims 1. Angled concrete block with an upright wall washer and a horizontally located, as well as one-piece molded foot disk, which connect to one another in an L-shape and on the inside are connected to at least one triangular plate web running perpendicular to both panes, characterized in that - That the Winkelbösehungsstein (10; 20) consists of non-reinforced concrete, - That the plate web (14; 24) in the wall disc (11; 21) and the foot disc (12; 22) running continuously with a radius of curvature between rl = 8 cm and r2 = 18 cm passes over, - and that the plate web has a wall thickness between dl = 8 cm and d2 = 18 cm. 2. Winkelbösehungsstein according to claim 1, characterized draws, that the radius of curvature is 10 cm. 3. Winkelbösehungsstein according to claim 1 or 2, characterized ge indicates that the wall thickness of the wall washer (1 l; 21) between 0.8 times and corresponds to 1.2 times the wall thickness of the plate web (14; 24). 4. Angled embankment stone according to one of claims 1 to 3, d a d u r ch marked, that the wall thickness of the foot disk (12; 22) behind the curved transition area to the wall washer (11; 21) between 1 and 1.4 times the wall thickness of the wall washer. 5. Angled embankment stone according to one or more of claims 1 to 4, characterized, that with a wide, more than one plate web (24) required angular slope stone the ratio of the clear distance side edge / plate web: plate web / plate web is 1: 2. 6. Angled embankment stone according to one of claims 1 to 5, characterized in that that the plate web (14; 24) is conical from top to bottom, the Wall thickness above about 0.8 times and below about 1 times the wall thickness corresponds to the wall washer. 7. Angled embankment stone according to one of claims 1 to 6, d a d u r ch marked, that the foot disk (12; 22) from the transition area to the wall disk
(11; 21) tapered towards the rear from about 1.2 times to about 1 times the wall washer. 8. Angled embankment stone according to one or more of claims 1 to 7, characterized, - that the plate web is provided with suspension devices, - and that for the load bearing during the transport of the angular embankment stone a longitudinal reinforcement is arranged in the plate web on the suspension device.