HU182851B - Prop member for sustaining walls of reinforced soil type closing built earthworks - Google Patents

Abstract

The support wall element is used for retaining walls for motorways, bridge or approach ramps, or railway embankments, with wall anchor, anchor bonding element and guiding and connecting element. It can be prefabricated, and is durable, and stable in the event of ground settlement. It is an H-shaped frontal element (14), with a trapezoidal shaped guiding and connecting edge (24) on one side (22), and a groove (28) to hold this on the other side (26). The anchor is made of non-metallic material. Its binding element comprises a cutout (36) in the frontal element and an anchor end connectable with this.

Description

BACKGROUND OF THE INVENTION The present invention relates to a retaining wall element for use in the construction of "reinforced soil" retaining walls, which is particularly useful for sealing embankments in motorways, bridge crossings and railway tracks.

As it is known, the so-called "reinforced soil" retaining walls have recently been increasingly used to close the built earthworks. These are prefabricated steel or reinforced concrete support walls, where the stability of the retaining wall, ie the absorption of tensile forces in the soil, is ensured by anchoring elements connected to the support walls and horizontally embedded in the ground. Like "reinforced concrete", this "reinforcement" improves the mechanical properties of the "reinforced" soil;

There is also known a solution in which the guiding and joining of superimposed support elements are constructed by means of protruding steel pins fixed in the support elements and their receiving holes. The anchors are then concreted into the retaining wall elements by means of steel lugs, to which the steel plate anchors are fastened with screws. Such a solution is described, for example, in the Civil Engineering Review XXVII. Vol. 1977/7. number 327-328. pages 2055 983, and French publication.

Although the above proposal has considerable advantages over conventional reinforced concrete retaining walls and is therefore quite widespread in practice, it needs to be improved in some respects. The major disadvantage is that the corrosion protection of steel anchors, anchor joints, guide pins and screws cannot be satisfactorily solved even by special surface treatment or stainless steel. However, the use of special anti-corrosion coatings or stainless steels undesirably increases the cost. Another disadvantage of the above proposal is that due to the inevitable subsidence and deformation of the soil, some load-bearing elements are subjected to additional loads which cause the load-bearing elements to open, which endangers the stability of the load-bearing wall.

It is an object of the present invention to overcome the aforementioned deficiencies.

SUMMARY OF THE INVENTION The object of the present invention is to provide a prefabricated retaining wall element for the construction of an appropriately constructed earthwork retaining wall, which can effectively increase the resistance of the retaining wall constructed therefrom, and also maintain the stability of the retaining wall in the event of soil subsidence.

SUMMARY OF THE INVENTION This object is achieved by the development of a known prefabricated retaining member which is formed in its upper and lower portions with a recessed H-shaped face with a recess tapering towards the center of the retaining member, and an anchoring member, anchorage member, and guiding means. A further development of the invention is that the anchoring member comprises a recess in the retaining wall element, opened from the rear face side, and a non-metallic material anchoring element which can be inserted into and sealed therewith, and the guide or coupling element is the upper part. and provided on its underside and along its recesses with projections or recesses for guiding and self-locking superimposed retaining wall elements in the plane of the retaining wall element '

Preferably, the guide and switch projections are provided as a lower flange formed at the upper side of the retaining wall element and at the base of the upper trapezoidal recess and at the two legs of the lower trapezoidal recess, while the guide and switching recesses They are designed as a groove at the base and on the underside.

The invention will be described in more detail with reference to the drawing.

In the drawing:

Fig. 1 is a front view of a retaining wall constructed from an exemplary embodiment of a retaining wall element according to the invention;

Figure 2 is a sectional view taken along line II-II in Figure 1;

Figure 3 is a front elevational view of an exemplary embodiment of a retaining wall member according to the invention;

Figure 4 is a sectional view taken along line IV-IV in Figure 3;

Figure 5 is a sectional view taken along line V-V in Figure 3;

Figure 6 is a sectional view taken along line VI-VI in Figure 3.

As shown in Figs. 1 and 2, the constructed earthwork 10, in this case the highway embankment, is closed by a retaining wall 12 constructed of retaining wall elements 14 according to the invention. Here, the retaining wall elements 14 are arranged side by side and above each other in a manner known per se. In the exemplary embodiment illustrated, the next row of retaining wall elements 16 is offset by a half pitch on a horizontal row of retaining wall elements 16.

The retaining wall element 14 is known to be provided with an anchor member 18, anchorage member 20 and a coupling member.

The retaining wall member is formed as an "H" shaped front member, wherein the guide and coupling member are formed as a common trapezoidal projection 24 on one side surface 22 of the front member, in this case a single trapezoidal projection 28 on the other side. 3 and 4). It is, of course, also possible, according to the invention, to provide a plurality of spaced apart projections 24 along the surface 22.

The upper and lower recesses of the retaining wall member 14 are shown in Fig. 3 with reference numerals 30 and 30 ', respectively, which are trapezoidal recesses tapering toward the center of the retaining wall member 14. As shown in the drawing, the retaining wall elements 14 are provided on their upper and lower sides 32 and 34 and along their recesses 30 and 30 'with protrusions for guiding and self-locking the retaining wall elements to be connected and receiving recesses thereon. In the present case, these are at the upper side 32 of the retaining wall element 14 and at the base of the upper trapezoidal recess 30, something! formed in the bottom 30 'of the lower recess two limbs 32 _a and 30a, and 30a as a peripheral projection, the

182,851 of these receiving depressions are formed in the upper recess 30 of the two legs and the bottom 30 'recess at the base and 34 formed in the lower side 30b, and 34 _B, and a groove 30b. 5

According to the invention, the anchoring element 18 is a flat bar made of a non-metallic material, in this case made of glass fiber reinforced polyester resin, the surfaces of which are roughened for better adhesion to the ground. According to a further feature of the invention, the anchor fastening element 20 comprises an opening 36 formed in the retaining wall element 14 and an associated end 38 of a non-metallic material. In this case, the anchor member end 38 is a hammer-head-extended end 15 of the anchor member 18, which is inserted into a closed slot 36 from the front side 40 of the retaining wall member 14 and secured in position. This provides a force-tight connection between the retaining wall member 14 and the anchor member 18 which is capable of absorbing horizontal forces 20.

1-6. In our experiments with the exemplary embodiment of FIG. 4, it has been found that the proposed solution makes the construction of the retaining wall considerably simpler and less expensive. This was achieved, first, by completely eliminating the components at risk of corrosion. The positioning of the prefabricated retaining wall elements 14 side by side or over one another is considerably facilitated. Such a geometry design of the retaining wall element 14 allows the submerging wall 12 to move relative to each other in the plane of the retaining wall when the subsurface is unavoidable, especially on looser soils. in the meantime, his relationship is maintained. Another important advantage is that anchor rods made of glass fiber reinforced polyester resin can be made relatively easily and cheaply with sufficient tensile strength, almost any surface roughness. This enables the proposed solution to build retaining walls on relatively low-friction soils (such as sandy soils).

Claims (2)

Patent claims 1. Retaining wall members for "earthed earth" retaining walls, constructed in the form of an H-shaped face plate with a recess tapering towards the center of its retaining walls, having at least one anchorage member, a non-metallic anchorage member and guides , characterized in that the anchorage member comprises a nest (36) in the retaining wall member open from the rear face (41) and a non-metallic anchor member end (38) which can be inserted into and connected therewith, and a switching element of támfalelem leading támfalelem top of one another to be joined in the plane of the upper and lower sides (32, 34) on which the recesses (30, 30 '), self-closing associated projections (32 _a, 30 _a, 30A) and those provided with receiving recesses (34 _B , 30 _A , 30 _B ). An embodiment of a retaining wall element according to claim 1, characterized in that the guide and switch projections on the upper side (32) of the retaining wall element (14) and at the base of the upper trapezoidal recess (30) and the lower trapezoidal recess (30 '). ) lower edge projection as formed by two stem (32 _A, 30 _A, 30A), in these receiving recesses in turn formed in the upper trapézbemélyedés (30), two stem and the lower trapézbemélyedés (30 ') at the base and on the lower side (34) a groove (30b , 30b and 30b).