DE1970492U - EMBOSSING MAT FOR SECURING EARTH STRUCTURES. - Google Patents

Description

'JU55112 * -9.8.67

PATE NTANWÄLTB

DIPL. ING. C. STOBPEIi · DIPL. ING. W. GOLLWITZEß IiANDAtr / PEVAXZ AM SCHÜTZENHOF

7th August 1967

Dr.

Dyckerhoff & Widmann limited partnership, Munich

"Embankment mat for securing earthworks"

The innovation relates to an embankment mat for securing earthworks, in particular dike and canal embankments and bodies of water made up of individual ones arranged at a mutual distance from one another and movably connected to one another Concrete bodies.

For fastening embankments, mat-like structures are known which consist of individual spaced apart arranged and for example by wires, ropes or the like. In Mat level interconnected concrete bodies exist. Such mats can be prefabricated in concrete plants and rolled up State to be transported to the installation site, where they can be easily Unrolling from the top of the slope can finally be laid. Such mats only offer a very limited one

Protection of the embankment threatened by erosion, since parts of the embankment can be washed out by the running water as well as by the groundwater running out between the concrete bodies, which leads to the collapse of the embankment fortifications. Such embankment mats is thus no additional structural measures is very limited verwendungsf ähig _a since, depending on the given situations, a completely tight cover an embankment required to erosion from water in the canal, river, sea and especially from the wave run in the underground of the embankment to avoid. In cases of larger amounts of groundwater from higher embankments, drainage of the embankment is even necessary, whereby the drainage of fine sand components from the subsoil must also be avoided by appropriate filtering.

The task of the innovation is to improve an embankment mat of the known type so that it can be obtained while maintaining the Factory prefabrication and the advantages resulting from simple installation meet the increased requirements.

The innovation solves this problem in that in such a Embankment mat to avoid erosion from the embankment, the spaces between the individual concrete bodies with filter material provided or sealed with an elastic sealant.

A continuous one is expediently on the underside of the concrete body Filter mat set in concrete. This filter mat can form folds in the gaps between the concrete bodies to provide room for maneuver to have when rolling up the slope mat.

Furthermore, individual concrete bodies can be provided with openings which are expediently designed as slots. Appropriate

For each concrete body, two slots running in the fall line are created arranged.

In association with a continuous, at the bottom of the A particularly good filter effect is achieved in a concrete body embedded in the filter mat.

However, the concrete bodies can also be designed to be filterable as such.

Finally, the individual concrete bodies can face downwards Be provided with studs and / or upward-pointing humps.

The slope mat according to the innovation is described below with reference to the exemplary embodiments shown in the accompanying drawings explained in more detail. Show it;

Fig. 1 is a section through a mat in which the spaces are sealed,

2 shows a section through an embankment mat in which a filter mat is arranged on the underside, and

Fig. 3 is a plan view of a mat, in which part of the concrete body is provided with slots.

In the embodiment according to FIG. 1, the concrete bodies 1, which are expediently designed as square plates in plan, are arranged at a mutual distance from one another and are movably connected to one another by flexible wires 2, 3 embedded in concrete. For this

It is advisable to use stainless steel wire ropes for connecting wires. The front edges 4 of the concrete body 1 are sloping from ge to allow tight rolling on rollers of small diameter and to give the potting compound a firm seat and hold. Individual plates have cleats 5 on the underside or stools 6 on the top. The downward protruding tunnels provide additional protection against sliding of the slope mat on slippery ground, while the stools 6 to be arranged at the same time or separately can be attached to reduce the wave run-up depending on the given situation.

In the embankment mat shown in Fig. 1, all joints are sealed between the individual plates 1. The wedge joints 7 are for this purpose after the concrete has set with a weather- and temperature-resistant Potting material up to about a third of the joint height poured from above. A bituminous grouting material is recommended Basis., Which is processed at a temperature of around 200 C. The In addition to being temperature resistant, the grouting material must have a high level of HaK effect on the concrete Transport and laying roll tear open the joints and reduce the tightness by placing them on embankments that are not completely flat will.

The slope mat shown in Fig. 2 is intended for cases of greater groundwater flow from higher slopes. There is one with her Drainage of the embankment possible, whereby by installing a filter layer a drainage of fine sand components from the subsurface is avoided. So there is water exchange through the filter layer guaranteed between the groundwater level and the body of water. The 'wedge joints remain open here, except for their cover by the filter.

The type and size of the filter depends on the grain size of the existing soil and the necessary water exchange.

In the embodiment shown in FIG. 2, the filter consists of a nylon mesh fabric 10, which is already used during the concreting process the embankment mat can also be concreted in. In the area of the wedge joints 7 and in the area of the plates provided with slots 9 the filter effect remains guaranteed. The bulge 11 in the wedge joint 7 is intended to tear the filter mat when it is rolled up on the transport and prevent laying role. The material can stretch, ■ without the fibers being stretched.

Instead of such a nylon mesh, a gravel filter can also be used can be built in or filters can be made with other materials of different processing.

The area of the concrete body 8 provided with slits lies in the installed state in the area of the water level and causes when it sinks through ebb and flow. Wave movements or lowering of the water level when the lock is opened result in a faster exit of the groundwater into the body of water. This reduces the pressure of the groundwater column against the mat in the area and prevents the same from lifting off the embankment. The length of the area of the slotted plates is dependent on the height of the water transition zone and the slope of the embankment. This area should fully cover the transition area.

In order to avoid any danger spots even with mat joints between two embankment mats, the mats are on one side with provided with a laterally protruding film on which the subsequent Embankment mat lays. Instead of this film, which is the case with dense mats

must also ensure a tight seal, one can use Let the slope mats provided with a filter mat protrude laterally, as indicated at 12 in FIG. 3.

Claims (1)

P.A. 1.55112-9.8.67 PATB NTAN WALTE DIPL. ING. C. STOEPEL · DIPL. ING. W. GOLL ^ tVITZEB IjANDATT / PFAIiZ · AM SCHÜTZBSHOF 7th August 1967 Dr. Protection claims: 1.) Embankment mat for securing earthworks, in particular Embankments, made up of individual spaced apart and movably connected to one another Concrete bodies, characterized in that to avoid erosion from the embankment, the spaces (7) between the individual concrete bodies (1) are provided with filter material or sealed with an elastic sealing material. 2.) embankment mat according to claim I _4, characterized in that a continuous filter mat (10) is concreted in on the underside of the concrete body (1, 8). 3.) embankment mat according to claim 2, characterized in that that the filter mat (10) forms folds (11) in the spaces between the concrete bodies (1, 8). 4.) embankment mat according to one of claims 1 to 3, characterized in that individual concrete bodies (8) with openings are provided. 5. \ embankment mat according to claim 4, characterized in that the openings are designed as slots (9). 6.) embankment mat according to claim 5 _a, characterized in that per concrete body two in the fall line extending slots | 9) are arranged. 7.) embankment mat according to one of claims 1 to 3, characterized characterized in that the concrete body itself consists of a filterable Material. 8.) embankment mat according to one of claims 1 to 3 _9, characterized in that individual concrete bodies are provided with downward and / or upward-facing cusps.