EP1793056A1 - Sealing element for fabricating waterproof exterior walls using concrete double walled elements - Google Patents

Abstract

The rooms are constructed using concrete double wall elements (16) placed on a reinforcement layer (14) of a concrete floor plate (10). The sealing has a support (22,26) for insertion into the floor plate, and a vertical long flat joint element (24). After erection and grouting of a double wall element, the joint element seals the joint between wall and base. The support consists of several concrete steel brackets (22) connected rigidly to each other in longitudinal direction of the joint element. The joint element has a coating to prevent water circulation and aid gluing to other joint elements. The coating is butyl rubber, bitumen, synthetically-modified bitumen, a synthetically-modified coating reacting with fresh concrete, or a coating with swelling capacity.

Description

Technical area

The invention relates to sealing elements for the production of water-impermeable outer walls of recessed in water-bearing soil spaces using to be set up on a concrete floor slab concrete double wall elements. The invention further relates to a concrete double wall element and a recessed in aquiferous soil space.

State of the art

Structures in the ground are stressed in different ways by moisture or water. They must be tight in particular to soil moisture, pressing and non-crushing water.

Special requirements arise when used for the construction of the outer walls precast concrete elements, such as concrete double wall elements. If several double wall elements placed on a base plate, so arise at the joints joints, which must be suitably sealed.

In a known under the keyword "black tub" sealing method, the entire outer surface of a recessed in aquifer soil space is sealed. For this purpose, the building is wrapped on its base and on its side walls with plastic waterproofing membranes and packed so watertight. At the joints between the finished parts, the plastic sheets must be carefully laid and welded in order to prevent ingress of water. This process is time consuming and labor intensive and also very expensive due to the high material consumption.

Another known solution is to set up on the finished floor panel for the construction of the outer walls of an inner and outer Verschalungswand into which concrete is poured. However, this process requires a large amount of reinforcing material in addition to the cost of the shuttering, in order to minimize the shrinkage caused when setting the concrete.

Of the DE 100 14 966 A1 is proposed in connection with the fixation of the vertical joint of Hohlwandabschnitten shock-bridging applied sealing strips, which are supported against one of the hollow wall sections on them set braces, to provide steel bracket with which the outgoing from the bottom of the bracket, consisting of sheet steel sealing strip combined by a welded joint becomes.

From the DE 101 08 705 A1 a component is known for influencing the crack formation in rising concrete walls of buildings, wherein the concrete walls are made of precast concrete slabs and intervening in-situ concrete walls. The component is embedded in the in-situ concrete in the form of a joint cross so that the first web of the joint cross is aligned parallel to the longitudinal wall extent in a corner of two collapsed walls as a secant and the second web of the joint cross is oriented orthogonal to the wall or diagonally to the corner, wherein the component extends over the height of the wall. The joint cross consists of black plate and the first web is angled at its ends, so that the bends extend parallel to the second web.

Presentation of the invention

This is where the invention starts. The invention, as characterized in the claims, the object underlying the disadvantages of the prior art to avoid and in particular to allow a simple and cost-effective sealing of the outer walls of sunken in water-immersed spaces.

This object is achieved by the sealing element, the concrete double wall element, the recessed in aquiferous space and the method for producing water-impermeable outer walls with the features of the independent claims. Further developments are the subject of the dependent claims.

"Double wall element" is understood in the context of the present invention, a precast concrete element consisting of two interconnected by lattice girders reinforced concrete shells. After assembly, the double wall elements are poured with in-situ concrete, the elements themselves serve as formwork. For double-wall elements, other designations such as hollow wall, triple wall, element wall, finished wall, two-shell wall, partial finished wall or double-shell partial prefabricated wall are also common. The term "double wall element" below includes all such elements.

• ein langgestrecktes flächiges Fugenelement, das nach dem Aufstellen und Ausgießen aneinandergrenzender Doppelwandelemente die Wand-Wand-Stoßfuge abdichtet,
• ein an dem Fugenelement angebrachtes und sich entlang der Längsrichtung und senkrecht zur Oberfläche des Fugenelements erstreckendes Sollrisselement, und
• zwei Führungsschienen zur vertikalen Befestigung an Gitterträgern der aneinandergrenzenden Doppelwandelemente, die zur Aufnahme gegenüberliegender Längskanten des Fugenelements beim Aufstellen der Doppelwandelemente ausgelegt und eingerichtet sind.

The present invention provides sealing members for sealing the wall-to-wall joints between adjacent double wall elements. In a first variant of the invention comprises a sealing element for wall-wall joints

• an elongated planar joint element which seals the wall-wall joint after the placement and pouring of adjacent double-wall elements,
• an attached to the joint element and extending along the longitudinal direction and perpendicular to the surface of the joint element Sollrisselement, and
• two guide rails for vertical attachment to lattice girders of the adjacent double wall elements, which are designed and arranged for receiving opposite longitudinal edges of the joint element when setting up the double wall elements.

The position of the joint element is thereby fixed during the pouring of the double wall elements by the guide rails. It is understood that the distance between the two Guide rails and the width of the joint element are coordinated to ensure a secure fit.

Alternatively, such a sealing element comprises, in addition to the elongated planar joint element and the cracking element attached thereto, one or more braced wire brackets, in particular reinforcing steel or smooth steel yokes, for fixing the position of the joint element adjacent to each other in the joint area. In this case, the joint element is not fixed by guide rails of the double wall elements, but by its tension with one or more wire bracket.

In both variants, the tear crack element is advantageously designed so that it does not connect to the in-situ concrete. In particular, the predetermined tear element can be provided with a plastic coating and is formed, for example, by a grid mat with a shrunk-on polyethylene film. Due to the local weakening of the concrete cross-section, the predetermined crack element causes the shrinkage cracks forming in the concrete to occur in a controlled manner at the location of the predetermined crack element, where they are secured by the joint sheet against pressing and non-pressing water.

For the sealing of the butt joints between straight walls, the joint element of the sealing element is expediently formed by a flat joint plate with a substantially rectangular circumference.

For sealing corner joints the joint element is advantageously formed by a bent joint plate with also substantially rectangular periphery. In particular, the joint plate for sealing a 90 ° corner joint can have two closely spaced creases of approximately 135 °, with the predetermined tear element optionally being arranged between the two creases. As in the case of the first sealing element, other bending angles or the formation with a different number of kinks can also be considered here.

The provided for the wall-wall joint area joint element can be completely coated on the water-facing side and on the water-facing Side be partially coated in a bonding area for bonding with joint elements of other sealing elements.

In particular, a butyl rubber coating, a bituminous coating, a plastic-modified bitumen coating or a plastic-modified coating which reacts with fresh concrete and thereby forms an excellent bond with the concrete is considered. In addition, swellable coatings can be used with advantage. The partially coated bonding area is expediently located in the lower region of the joint element, so that it can easily be adhesively bonded to the joint elements of sole-wall sealing elements after insertion of the sealing element in an overlapping area.

For sealing sole-wall joints sealing elements are used with Aufständerungsträger for incorporation into the concrete floor slab and held by the Aufstandsänderung in vertical alignment, elongated planar joint element that seals the wall-sole joint after setting up and pouring a double wall element. The sole-wall sealing elements described below are not part of the invention.

The platform support fixes and stabilizes the position of the joint element. In particular, a tilting or other change in position of the joint element during pouring of the double wall element with in-situ concrete is avoided. As a result, the sealing element can ensure a controlled and reliable sealing of the wall-sole joint.

Preferably, the elevation support comprises a plurality of beta steal bars which are rigidly connected to each other along the longitudinal direction of the joint element. In particular, the reinforcing steel bars can be welded to a longitudinal bar of reinforcing steel. This results in a light and stable, easy to handle on a construction site sealing element.

A special simple and inexpensive production can be achieved in that the reinforcing steel bow are integrally formed. After a favorable In addition, the reinforcing steel bars have a horizontal standing area and two essentially vertical supporting areas, to which they are connected, in particular welded, to the joint element.

The support bracket is preferably designed and set up for placement on a reinforcement layer of the concrete floor slab and for complete integration into the floor slab.

In an advantageous embodiment, the joint element is formed by a flat joint plate with a substantially rectangular circumference. A sealing element designed in this way is particularly suitable for sealing the gap between a straight wall and a base plate. In order to seal the sole-wall joint in the region of a corner joint, a joint element is used, which is formed by a bent joint plate with a substantially rectangular circumference. In particular, the joint plate may have two close to each other kinks of about 135 ° in order to seal the sole-wall joint in the region of a 90 ° corner joint. For other corner brackets, of course, other bending angles come into consideration. Also, the corner angle can be bridged with only one kink or with more than two kinks instead of two close to each other kinks.

The joint plate is preferably arranged in the upstand carrier in such a way that after incorporation of the upstand carrier into the bottom plate it is integrated into the bottom plate with a lower vertical portion, and that an upper vertical portion for sealing the sole-wall joint protrudes vertically out of the bottom plate , The lower and the upper vertical portion are expediently the same size, so that just half of the joint plate is integrated into the concrete floor slab.

In one variant, the joint element is provided with a coating to prevent Wasserumläufigkeit and for bonding with joint elements of other sealing elements. In this case, the joint element can be completely coated on the side facing the water and partially coated on the water-remote side in a bonding area.

As a coating is, for example, a butyl rubber coating, a bitumen coating, a plastic-modified bitumen coating or a plastic-modified coating that reacts with fresh concrete and thereby enters into an excellent bond (bonding) with the concrete, into consideration. In addition, swellable coatings can be used advantageously. In the bonding area, the joint element can be glued in a simple manner by pressure with overlapping, also coated bonding areas of other joint elements. In addition, the overlap joints can be secured by impact brackets.

The present invention further comprises a concrete double wall element having two concrete shells connected by lattice girders, in which the lattice girder is provided on each of opposite sides with a vertical guide rail for receiving the joint element of a sealing element for the sealing of wall-to-wall joints of the type described.

The invention further comprises a recessed in aquifer soil with a concrete floor slab and placed on the bottom plate and cast with in-situ concrete concrete double wall elements. In this case, a plurality of sealing elements for sealing the sole-wall joint is incorporated in the bottom plate. The joint elements of the sole-wall sealing elements overlap each other in the joint and are connected to each other in this overlap region, in particular welded or glued. As a result, a reliable circumferential seal of the sole-wall joint can be generated. The wall-wall joints adjoining double wall elements are sealed with sealing elements according to the invention for the sealing of wall-wall joints. The joint elements of the wall-wall sealing elements overlap on their underside the joint elements of the sole-wall sealing elements and are connected in the overlap region with these, in particular welded or glued. The joint elements of the wall-wall sealing elements can be fixed in position for casting with in-situ concrete by guide rails attached to lattice members adjacent to each other double wall elements or by strained wire hanger, especially reinforcing steel or smooth steel.

In the space thus prepared all joints between the precast concrete parts or between the precast and the bottom plate are optimally sealed against oppressive as against non-pressing water

• Auflegen einer Mehrzahl von Abdichtelementen zum Abdichten einer Sohle-Wand-Fuge auf eine Bewehrungslage einer Betonbodenplatte, so dass die Fugenelemente einander im Stoß überlappen,
• Betonieren der Bodenplatte um den Aufständerungsträger und einen unteren vertikalen Teilbereich der Fugenelemente in die Bodenplatte einzubinden,
• Aufstellen von Doppelwandelementen mittig jeweils über dem oberen vertikalen Teilbereich der Fugenelemente, und
• Ausgießen der Doppelwandelemente mit Ortbeton,

wobei die Doppelwandelemente vor dem Aufstellen auf gegenüberliegenden Seiten jeweils mit einer vertikalen Führungsschiene versehen werden.The present invention also encompasses a method for producing water-impermeable outer walls of rooms embedded in aquiferous soil with the following steps:

• Applying a plurality of sealing elements for sealing a sole-wall joint to a reinforcement layer of a concrete floor slab so that the joint elements overlap each other in the joint,
• Concreting the floor slab to integrate the upstand support and a lower vertical portion of the joint elements in the floor slab,
• Setting up double wall elements centrally above the upper vertical portion of the joint elements, and
• Pouring the double wall elements with in-situ concrete,

wherein the double wall elements are each provided with a vertical guide rail before setting up on opposite sides.

This is preferably done already at the manufacturer of the double wall elements, so that they are already delivered to the construction site with integrated guide rails. Alternatively, the guide rails are attached only locally on the lattice girders of the double wall elements, in particular welded. According to a further alternative, the guide rails are welded by the manufacturer of the sealing elements to the lattice girders of the double wall elements and the lattice girders are delivered together with the welded-on guide rails to the precast plant. Thus, the manufacturer of the sealing elements can ensure that the distance of the guide rails corresponds to the width of the later-to-be-inserted joint element.

The sole-wall joint elements are advantageously connected to one another in the overlapping region, in particular welded or glued. It is also expedient if the elevation support of the first sealing elements are welded to the reinforcing layer after being placed on it, fastened thereto or fastened with mounting brackets.

After setting up a double wall element, a sealing element for sealing the wall-wall butt joint is inserted into an exposed guide rail of the double wall element, so that the joint element of the wall-wall sealing element overlaps on its underside the joint element of a sole wall sealing element. Then it is connected in the overlap area with this, in particular welded or glued.

Subsequently, another double wall element can be set up, the guide rail receives the still free longitudinal edge of the joint element. The joint element is then secured during later pouring the double wall elements by supporting at three points in its position. In addition to the welding or bonding in the overlapping area with the joint element of the sole-wall sealing element, it is securely held at its longitudinal edges by the guide rails of the two adjoining double-wall elements in its vertical orientation.

When inserting the last double wall element of an outer wall, this can be introduced from above with a crane or similar device in the gap and held in a vertical position over the overlapping region of the joint elements of the first and second sealing member. After welding or gluing the joint elements, the double wall element is lowered onto the bottom plate.

In a second variant, the double wall elements have no guide rails. The position of the vertical joint elements of the wall-wall sealing elements is secured in this variant after the erection of the double wall elements by braced bent wire hanger. In this case, the restoring force of the strained wire hanger together with the static friction of the bracket on the shells of the double wall elements for a secure hold of the joint elements when pouring the double wall elements with in-situ concrete.

Due to their material thickness and construction, the vertical joint elements have a very high inherent rigidity, so that they only have to be fixed in two places (at the bottom by welding or gluing and at the top by wire clips) and do not deform when the double wall elements are poured with in-situ concrete.

Fig. 1

eine schematische Querschnittsdarstellung einer Sohle-Wand-Fuge zwischen einer Bodenplatte und einem Doppelwandelement mit einem Sohle-Wand-Abdichtelement (nicht Bestandteil der Erfindung);

Fig. 2

eine Seitenansicht des Abdichtelements von Fig. 1;

Fig. 3

eine Aufsicht auf das Abdichtelement von Fig. 1 und 2;

Fig. 4

eine Aufsicht auf eine Abwandlung des Abdichtelements der Figuren 2 und 3 zum Abdichten der Sohle-Wand-Fuge im Bereich eines 90° Eckstoßes;

Fig. 5

in (b) eine Aufsicht auf eine Wand-Wand-Fuge zwischen aneinandergrenzenden Doppelwandelementen mit einem Abdichtelement nach einem Ausführungsbeispiel der Erfindung, wobei
in (a) das rechte Doppelwandelement und das Abdichtelement vor dem Einschieben in die Führungsschiene dargestellt sind;

Fig. 6

eine perspektivische Darstellung des Abdichtelements und einer der an den Doppelwandelementen angebrachten Führungsschienen von Fig. 5;

Fig. 7

eine Aufsicht auf eine Abwandlung des Abdichtelements der Figuren 5 und 6 zum Abdichten der Wand-Wand-Fuge im Bereich eines 90° Eckstoßes;

Fig. 8

eine perspektivische Ansicht eines mit verspannten Drahtbügeln stabilisierten Abdichtelements für Wand-Wand-Fugen nach einem weiteren Ausführungsbeispiel der Erfindung, in (a) von der wasserabgewandten Seite und in (b) von der wasserzugewandten Seite her gesehen;

Fig. 9

in (a) einen Drahtbügel zur Lagefixierung von Abdichtelementen für gerade Wand-Wand-Stoßfugen und in (b) einen Drahtbügel zur Lagefixierung von Abdichtelementen für Eckstoßfugen; und

Fig. 10

in (a) eine Aufsicht auf eine Wand-Wand-Fuge wie in Fig. 5, mit einem Abdichtelement nach Fig. 8 und gesichert durch den Drahtbügel der Fig. 9(a), und
in (b) eine Aufsicht auf eine Wand-Wand-Fuge im Bereich eines 90° Eckstoßes wie in Fig. 7, mit einem abgewandelten gewinkelten Abdichtelement nach Fig. 8 und gesichert durch den Drahtbügel der Fig. 9(b).

The invention will be explained in more detail with reference to embodiments in conjunction with the drawings. Only the essential elements for understanding the invention are shown. It shows

Fig. 1

a schematic cross-sectional view of a sole-wall joint between a bottom plate and a double wall element with a sole-wall sealing member (not part of the invention);

Fig. 2

a side view of the sealing member of Fig. 1;

Fig. 3

a plan view of the sealing member of Figures 1 and 2.

Fig. 4

a plan view of a modification of the sealing member of Figures 2 and 3 for sealing the sole-wall joint in the region of a 90 ° corner joint;

Fig. 5

in (b) is a plan view of a wall-wall joint between adjacent double-wall elements with a sealing element according to an embodiment of the invention, wherein
in (a) the right double wall element and the sealing element are shown prior to insertion into the guide rail;

Fig. 6

a perspective view of the sealing member and one of the attached to the double wall elements guide rails of Fig. 5;

Fig. 7

a plan view of a modification of the sealing member of Figures 5 and 6 for sealing the wall-wall joint in the region of a 90 ° corner joint;

Fig. 8

a perspective view of a stabilized with strained wire brackets sealing element for wall-wall joints according to another embodiment of the invention seen in (a) from the water-side and in (b) from the water-facing side;

Fig. 9

in (a) a wire hanger for fixing the position of sealing elements for straight wall-wall joints and in (b) a wire hanger for fixing the position of sealing elements for corner joints; and

Fig. 10

in (a) is a plan view of a wall-wall joint as in Fig. 5, with a sealing member according to Fig. 8 and secured by the wire bracket of Fig. 9 (a), and
in (b) is a plan view of a wall-wall joint in the region of a 90 ° corner joint as in Fig. 7, with a modified angled sealing member according to Fig. 8 and secured by the wire bracket of Fig. 9 (b).

Ways to carry out the invention

Figure 1 shows a schematic cross-sectional view of a sole-wall joint between a bottom plate 10 and a double wall member 16 with a sealing member 20. Figures 2 and 3 show an uninstalled sealing member 20 additionally in side view and in plan view. Sole-wall sealing elements are not part of the present invention.

The sealing member 20 has a 2 mm thick and 250 mm wide joint plate 24 which is held by a support bracket 22, 26 in vertical alignment. For this purpose, the uprising support contains a plurality of similar reinforcing steel brackets 22, which along the longitudinal direction of the joint plate 24 via two spaced reinforcing steel longitudinal bars 26 are rigidly connected together in the foot area. In the example, the reinforcing steel bars 22 are welded to the longitudinal bars 26 at the contact points. While four brackets 22 are shown in Figs. 2 and 3, it is understood that depending on the dimensions of the joint plate 24 and the required stability, a smaller or larger number of brackets 22 may be used.

As best seen in Fig. 1, the reinforcing steel bars 22 are made in one piece and in addition to a horizontal standing area 30, two substantially vertical support portions 32 on which they are welded to the joint plate 24 (reference numeral 28).

In order to produce a water-impermeable outer wall, a plurality of sealing elements 20 are placed on a lower reinforcing layer 14 of the base plate 10 prior to concreting the base plate. In the example, the sealing elements 20 with their two longitudinal bars 26 are connected to the lower reinforcing layer 14 and in the area of the reinforcing steel bars 22 upper reinforcement layer 12 of the bottom plate 10 welded.

For the building corners an angled sealing element 40 is used, as shown in Fig. 4 in plan view. The joint plate 44 and the longitudinal bars 46 of the sealing member 40 in this case have two closely spaced creases 45 and 47, each forming an angle φ of 135 °. It is understood that other corner angles φ can be selected for other corner angles to be reached. Also, the corner angle can be bridged with only one kink. However, particularly in connection with the wall-corner corner-piece sealing member described below, the two-buckle configuration is preferable. As with the sealing element described in connection with FIGS. 1 to 3, the joint plate 44 is held in its vertical orientation by a plurality of welded reinforcing steel bars 42.

After setting up all sealing elements 20 and 40, the bottom plate is concreted in order to incorporate the elevation support and in each case a lower vertical portion 34 of the joint plates 24, 44 in the bottom plate 10. The upper vertical Part area 36 protrudes vertically in each case in a secured and stable position out of the bottom plate 10 and is available for sealing the sole-wall joint available. The lower and the upper portion 34 and 36 are equal and take each half of the joint plate width.

Adjacent sealing elements 20 or 40 are integrated with such a distance in the bottom plate that their joint plates 24 and 24 or, 24 and 44 overlap each other and can be welded or glued together in the overlap region. For bonding, the joint plates, at least in the overlap region, have a corresponding coating, for example a butyl rubber coating, bitumen coating, plastic-modified bitumen coating or a plastic-modified coating which reacts with fresh concrete and thereby forms an excellent bond with the concrete. In addition, swellable coatings can also be used. The overlap joints can also be secured by clamps.

After incorporation and welding or bonding of all sealing elements 20, 40, double wall elements 16 are placed centrally above the protruding upper portion 36 of the joint plates 24, 44, respectively.

For sealing the wall-wall joints between the adjacent double-wall elements sealing elements according to the invention are provided, which will now be described with reference to Figures 5 to 10.

FIG. 5 (a) shows a plan view of a double wall element 50 with an inner shell 52 and an outer shell 54. The two concrete shells 52 and 54 are interconnected by a lattice girder 56, of which only the outer edge region is shown in the figure. On the lattice girder 56, a vertical guide rail 66 is welded, which extends substantially over the entire height of the double wall element 50.

FIG. 5 (a) further shows a joint plate 62 extending in the vertical direction, on whose two main surfaces a respective tear crack element 64 is attached.

The joint plate 62, the predetermined tear elements 64 and the guide rails 66 together form a sealing element 60.

After setting up the double wall element 50, the joint plate 62 of the sealing element 60 is inserted with a longitudinal edge in the exposed guide rail 66 so that it overlaps the joint plate of a sealing member 20 or 40 on its underside, and then can be welded in the overlap region with this.

After welding, another double wall element 50 is set up, the guide rail 66 of which receives the opposite longitudinal edge of the joint plate 62. This situation is shown in Fig. 5 (b). The joint plate 62 is now fixed in place at three points, which ensures a secure fit when pouring the double wall elements with in-situ concrete.

The joint plate 62 with the predetermined tear element 64 is shown together with one of the two guide rails 66 in FIG. 6 again in a perspective view. As can be clearly seen in FIG. 6, the tear crack element 64 extends along the vertical longitudinal direction and perpendicular to the surface of the joint plate 62. It is coated with a material which does not join the cast-in-situ concrete after casting. In the exemplary embodiment, the predetermined tear element 64 consists of two reinforcing steel meshes with shrunk-on polyethylene foil, which are welded onto opposite major surfaces of the joint plate 62. Due to the local weakening of the concrete cross section, the tear crack element 64 causes the shrinkage cracks forming in the concrete to form in the concrete at the location of the tear crack element 64, where they are secured by the joint plate 62 against pressing as well as non-pressing water.

In order to obtain an easily accessible welding area, the predetermined crack element, as also shown in FIG. 6, may also end somewhat above the lower edge 68 of the joint plate 62.

For sealing double-wall corner joints according to the invention an angled sealing member 70 is provided, which is shown in Fig. 7 in plan view. The two adjoining ones Double wall elements 80 and 82 are provided at their lattice girders 86 with guide rails 76 for receiving the joint plate 72. As described in connection with Fig. 4 joint plate of the sealing member 40, the joint plate 72 has two closely spaced creases 75 and 77, each about 135 °, the distance of which the kinks 45 and 47 of the underlying cover member 40 corresponds to a simple welding allow the two joint plates 44 and 72 in the overlapping area.

Between the two creases 75 and 77, a tear crack element 74 is arranged, which defines due to its orientation extending from the outer to the inner corner of the outer wall Sollriss.

After the introduction and welding of all sealing elements, the double wall elements can be poured in the secured position of all joint plates with in-situ concrete. The sealing elements 20 and 40 for the sole-wall joints and the sealing elements 60 and 70 for the wall-wall joints thus together form a complete sealing system for double wall outer walls.

An alternative design of a sealing element according to the invention for the sealing of wall-wall joints will now be explained in connection with Figures 8 to 10. FIG. 8 shows a perspective view of a braced wire bracket stabilized wall-to-wall seal member 90, wherein the seal member 90 is seen from the downstream side in FIG. 8 (a) and from the water-facing side in FIG. 8 (b) is shown. The sealing element 90 has a vertically extending joint plate 92 with a cracking element 94 attached to both sides. In the outer area of the side facing the water, the joint plate 92 is completely provided with a bituminous coating 98 (FIG. 8 (b)) to prevent water circulation. On the side facing away from the water, a lower portion is also provided with a bituminous coating 96 (FIG. 8 (a)), which serves to bond the sealing element 90 with joint plates introduced into the base plate.

The position of the vertical joint plate 92 in the joint area of adjacent double-wall elements 50 is made by means of brace-bent reinforcing steel bars or smooth-steel bars 100 secured. Due to the selected material thickness and its construction, the sealing element 90 has a very high inherent rigidity. It is therefore sufficient to glue the sealing element 90 in the lower region 96 or to weld and fix it in the upper region by wire bracket 100 to ensure a stable position of the joint plate 92 without deformation during pouring of the double wall elements with in-situ concrete.

In the embodiment, two of the wire brackets 100 shown in plan view in FIG. 9 (a) are pressed together at their L-shaped legs 102 and pushed over the joint sheet 92 with the protuberance 104 as shown in FIG. 10 (a). The joint sheet 92 is shown in phantom in Fig. 10 (a) as well as the joint sheet 114 of Fig. 10 (b) to make it stand out clearly from the wire hangers 100 and 110, respectively. Since the unstrained lateral extent of the bracket 100 is selected to be slightly larger than the distance of the shells of the double wall elements 50, the joint plate 92 is kept stable when pouring the double wall elements 50 with in-situ concrete by the tension with the two wire brackets 100.

For the stabilization of sealing elements for corner joints, a wire bracket 110, as shown in plan view in FIG. 9 (b), can be used. In the unstressed state, the two straight legs 112 intersect in space at an angle of about 50 ° without being connected to each other. Now, if the legs 112 pulled apart under magnification of the crossing angle and the thus strained bracket 110, as shown in Fig. 10 (b) pushed over an angled joint plate 114, the restoring force of the legs 112 generates a sufficient tension of the wire bracket 110 to to stabilize the joint plate 114 during pouring of the double wall elements 80, 82 with in-situ concrete.

It is understood that within the scope of the invention, in addition to the forms shown by way of example in FIGS. 9 (a) and 9 (b) for the wire hoops 100 and 110, other hoop designs are also contemplated which enable a fixation of the joint elements by bracing.

Claims (15)

Sealing element for the production of water-impermeable outer walls of embedded in water-bearing soil spaces using concrete on a concrete floor slab (10) to be erected double wall elements (50) with lattice girders (56) an elongated planar joint element (62) which seals the wall-wall joint after the installation and pouring of adjoining double-wall elements (50), - One on the joint element (62) attached and extending along the longitudinal direction and perpendicular to the surface of the joint element (62) Sollrisselement (64), and - Two guide rails (66) for vertical attachment to the lattice girders (56) of the adjacent double wall elements (50) which are designed and adapted for receiving opposite longitudinal edges of the joint element (62) when setting up the double wall elements (50). Sealing element for the production of water-impermeable outer walls of recessed spaces in water-bearing soil using on a concrete floor slab (10) to be erected concrete double wall elements (50) an elongated flat Fugert element (92) which seals the wall-wall joint after the placement and pouring of adjoining double wall elements (50), - One on the joint element (92) attached and extending along the longitudinal direction and perpendicular to the surface of the joint element (92) Sollrisselement (94), and - One or more braced wire brackets (100, 110), in particular reinforcing steel or smooth steel straps, for fixing the position of the joint element (92) in the joint area adjacent double wall elements (50), Sealing element according to claim 2, characterized in that the joint element (92) is fully coated on one side (98). Sealing element according to at least one of claims 1 to 3, characterized in that the predetermined tear element (64, 94) on both sides of the joint element (62, 92) is mounted. Sealing element according to at least one of claims 1 to 4, characterized in that the predetermined tear element (64, 94) is provided with a plastic coating. Sealing element according to at least one of claims 1 to 5, characterized in that the joint element by a flat joint plate (62, 92) is formed with a substantially rectangular periphery. Sealing element according to at least one of claims 1 to 6, characterized in that the joint element for sealing a Eckstoßfuge by a kinked joint plate (72, 114) is formed with a substantially rectangular periphery. Sealing element according to claim 7, characterized in that the joint plate (72, 114) for sealing a 90 ° corner joint has two closely spaced creases (75, 77) of approximately 135 °, wherein optionally the predetermined tear element (74) between the two kinks is arranged. Sealing element according to at least one of claims 1 to 8, characterized in that the joint element (92) in the outer region of the water-facing side fully coated (98) and on the side facing away from the water in a lower bonding region for bonding the sealing element is partially coated (96) with a joint element introduced into a concrete floor slab. A sealing member according to claim 9, characterized in that the joint element (92) is provided with a butyl rubber, a bitumen coating, a polymer modified bituminous coating, ruling with fresh concrete kunststoffmodifrzierten coating or a swellable coating. Concrete double wall element (50, 80, 82) with two concrete shells (52, 54) connected by lattice girders (56, 86), characterized in that the lattice girder (56, 86) for receiving the joint element (62, 72) of a sealing element ( 60, 70) according to claim 1 or according to claim back to claim 1 on opposite sides each with a vertical guide rail (66, 76) is provided. A space enclosed in aquiferous soil with a concrete floor slab (10), concrete double wall elements (16, 50, 80, 82) placed on the slab and cast with in-situ concrete, having a plurality of sole wall sealing elements embedded in the floor slab, wherein the Joining elements (24, 44) of the sole-wall sealing elements overlap one another in the joint and are connected, in particular welded or glued, in the overlapping area, characterized in that the wall-wall joints of adjoining double-wall elements (50, 80, 82) with sealing elements ( 60, 70, 90) according to at least one of claims 1 to 10 are sealed, wherein the joint elements (62, 72, 92) of the sealing elements (60, 70, 90) on its underside of the joint elements (24, 44) of the sole wall -Abdichtelemente (20, 40) overlap and connected in the overlap region with these, in particular welded or glued. The space according to claim 12, characterized in that the joint elements (62, 72) of the wall-wall sealing elements (60, 70) are fixed in position by guide rails (66) attached to lattice girders (56) adjacent to each other. Room according to claim 12, characterized in that the joint elements (92) of the wall-wall sealing elements (90) by strained wire hanger (100, 110), in particular reinforcing steel or plain steel straps are fixed in position. Method of making water-impermeable outer walls of rooms embedded in aquiferous soil, comprising the steps of: Laying a plurality of sole wall sealing elements on a reinforcement layer of a concrete floor slab so that the joint elements overlap one another in the joint, Concreting the floor slab to integrate the upstand support and a lower vertical portion of the joint elements in the floor slab, - Setting up of double wall elements centered respectively above the upper vertical portion of the joint elements, and - pouring the double wall elements with in-situ concrete, characterized in that the double wall elements are each provided with a vertical guide rail prior to installation on opposite sides, that after the installation of a double wall element in each case the joint element of a sealing element is inserted according to at least one of claims 1 to 10 in an exposed guide rail of the double wall element, that the joint element of the wall-wall sealing element overlaps on its underside the joint element of a sole-wall sealing element, and that it is connected, in particular welded or glued, in the region of overlap.

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