EP3733975A1 - Reinforcing cage and method for producing a slotted wall - Google Patents
Reinforcing cage and method for producing a slotted wall Download PDFInfo
- Publication number
- EP3733975A1 EP3733975A1 EP19172482.2A EP19172482A EP3733975A1 EP 3733975 A1 EP3733975 A1 EP 3733975A1 EP 19172482 A EP19172482 A EP 19172482A EP 3733975 A1 EP3733975 A1 EP 3733975A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reinforcement cage
- diaphragm wall
- glass fiber
- slot
- rods
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 230000002787 reinforcement Effects 0.000 claims abstract description 57
- 239000003365 glass fiber Substances 0.000 claims abstract description 26
- 238000003801 milling Methods 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 239000011152 fibreglass Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims 1
- 238000005520 cutting process Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000036346 tooth eruption Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/13—Foundation slots or slits; Implements for making these slots or slits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
Definitions
- the invention relates to a reinforcement cage for a trench wall panel, which is essentially square in cross section with a broad side and a narrow side, the reinforcement cage having reinforcing rods composed in a grid-like manner, according to the preamble of claim 1.
- the invention further relates to a method for producing a diaphragm wall in the floor from individual diaphragm wall panels, a slot being created in the floor which is filled with a hardenable compound, a reinforcement cage being inserted into the slot before, during or after filling with the hardenable compound is, according to the preamble of claim 9.
- the invention is based on the object of specifying a reinforcement cage for a diaphragm wall panel and a method for producing a diaphragm wall in the ground, with which an efficient production of a diaphragm wall with high strength can be achieved with little wear of the diaphragm wall device.
- the reinforcement cage according to the invention is characterized in that it is formed with glass fiber rods at least in one side area which is assigned to one of the narrow sides of the diaphragm wall panel.
- the invention is based on the knowledge that glass fiber rods in a cured filling compound of a diaphragm wall panel, in particular in a concrete compound, represent excellent reinforcement, which is comparable to reinforcement made of steel rods.
- glass fiber rods can easily be milled and milled over by the metal milling teeth of a trench wall milling machine and with relatively little wear on the milling teeth.
- the invention achieves that a reinforcement cage can be arranged over a relatively large area of the cross section of a trench wall panel. This increases the strength of a diaphragm wall panel and thus the overall strength of a diaphragm wall formed in this way.
- the reinforcement cage can be constructed entirely from glass fiber rods as reinforcement rods.
- the reinforcement cage has a grid-like base body which is formed with steel reinforcement rods, and that at least one side area with the glass fiber rods is arranged on the base body.
- the base body It is particularly preferred that two side areas with glass fiber struts are arranged on the base body.
- the side areas are aligned with the narrow sides of the diaphragm wall panel to be created.
- the side areas with the base body can have the same size in the longitudinal or width direction of the trench wall panel. This size is preferably smaller than the length of the intended diaphragm wall panel in the width direction.
- the reinforcement cage has two side areas Glass fiber rods at least the length of the slot in the width direction. Due to a certain elasticity of the glass fiber rods, the reinforcement cage can even be larger in the width direction, whereby it then adapts flexibly to the existing side walls of the slot. In this way, a particularly reliable centering of the reinforcing cage in the slot and thus in the diaphragm wall panel can take place. Correct comprehensive reinforcement is advantageous for the strength of the diaphragm wall panel to be formed.
- the two side areas extend to the edge of the narrow sides of the trench wall panel to be formed and form a spacer or centering element.
- At least individual glass fiber rods extend in the longitudinal direction of the reinforcement cage with an outwardly directed convex arch shape.
- This arch shape is designed in such a way that it tapers at least downwards and optionally also upwards, while a maximum width in the width direction of the reinforcement cage is given in a central area. Due to this at least partially oval or elliptical shape in the outer areas, the reinforcing cage can easily be inserted into the slot due to this conical or tapering design in some areas and the reinforcing cage can thus be reliably centered.
- this curved shape of the lateral glass fiber rods in the longitudinal direction supports an elastic property of the design of the side areas.
- the glass fiber rods are attached to the base body in a deflectable manner.
- the deflectable attachment can take place, for example, by means of bands or wires on the metal reinforcement cage.
- the connection point formed in this way allows increased mobility of the glass fiber rods.
- the invention further comprises a slotted wall panel in the floor, which is characterized in that it is formed with one of the reinforcement cages according to the invention described above.
- the diaphragm wall panel is made of a hardenable mass, in particular with concrete, optionally with the incorporation of the milled soil material formed, wherein the reinforcement cage is used in the slot in the ground before the mass hardens.
- the invention further comprises a trench wall in the floor, which is formed from several trench wall panels adjoining one another, at least one trench wall panel with a reinforcement cage according to the invention being provided.
- the reinforcement cages according to the invention can preferably only be provided in the primary diaphragm wall panels, between which the secondary diaphragm wall panels are then made by milling the previously produced and consolidated primary diaphragm wall panels to form the diaphragm wall.
- the reinforcement cages according to the invention can also be provided in all diaphragm wall panels, which simplifies the logistics at the construction site. Due to the simplified milling of the primary diaphragm wall panels when creating a diaphragm wall, this also allows the primary diaphragm wall panels to be created with an increased tolerance. This can help reduce the cost of a construction project.
- the invention is characterized in that a previously described reinforcement cage according to the invention is inserted into the slot.
- a preferred embodiment of the method according to the invention consists in that first two spaced primary diaphragm wall panels are created in the ground, with a reinforcement cage with fiberglass rods being inserted in at least one slot for one of the primary diaphragm wall panels, and then a slot for a secondary diaphragm wall panel is inserted between two primary diaphragm wall panels Milling is created, with side areas of the primary diaphragm wall panels and glass fiber rods arranged therein are at least partially milled.
- the milling teeth of the milling wheels of a trench wall milling machine provided for this purpose become only a relatively small amount during the machining of glass fiber rods that may protrude into the overlap area to be milled Exposed to wear, which is in any case significantly less than wear that would occur if metal reinforcing rods were milled.
- the single drawing shows a partially sectioned cross-sectional view of a slot 7 in the base 5.
- the slot 7 is designed with a rectangular cross section with two narrow sides 8 and two broad sides 9 running parallel to the plane of the drawing.
- a reinforcement cage 10 according to the invention is inserted into this slot 7, which has a depth of typically between 10 m to 30 m or deeper.
- the reinforcement cage 10 has an approximately cuboid base body 11 which is constructed from reinforcement rods 12 like a grid. Of the reinforcing rods 12, the reinforcing rods 12 extending in the longitudinal direction of the slot 7 are shown in the drawing, which are preferably connected by welding via horizontal or transverse rods not shown in detail.
- glass fiber rods 20 running in the longitudinal direction are mounted, which form the lateral outer area of the reinforcement cage 10.
- the longitudinally extending glass fiber rods 20 are designed with a convex arch shape, which facilitates the insertion of the reinforcement cage 10 into the slot 7, which is filled with a hardenable suspension (not shown here, in particular a concrete suspension) to form a diaphragm wall panel in the slot 7.
- the curved glass fiber rods 20, which run in the longitudinal direction, are attached to the reinforcement rods 12 of the base body 11 via transversely directed supports 22 in such a way that they are fixed or deflectable or displaceable in a transverse direction.
- the glass fiber rods 20 can reach up to the narrow sides 8 of the slot 7.
- the diaphragm wall panel created in the slot 7 be milled in an edge region, milling of the glass fiber rods 20 by the metal milling wheels of the trench wall milling machine is easily possible.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Reinforcement Elements For Buildings (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
Die Erfindung betrifft einen Armierungskorb für ein Schlitzwandpaneel, welches im Querschnitt im Wesentlichen viereckig mit einer Breitseite und einer Schmalseite ist, wobei der Armierungskorb gitterartig zusammengesetzte Armierungsstäbe aufweist. Gemäß der Erfindung ist vorgesehen, dass der Armierungskorb zumindest in einem Seitenbereich, welcher einer der Schmalseiten des Schlitzwandpaneels zugeordnet ist, mit Glasfaserstäben gebildet ist. Die Erfindung umfasst weiter ein Verfahren zum Herstellen einer Schlitzwand im Boden unter Verwendung eines solchen Armierungskorbes.The invention relates to a reinforcement cage for a diaphragm wall panel which is essentially quadrangular in cross section with a broad side and a narrow side, the reinforcement cage having reinforcing rods assembled in a grid-like manner. According to the invention it is provided that the reinforcement cage is formed with glass fiber rods at least in a side area which is assigned to one of the narrow sides of the trench wall panel. The invention further comprises a method for producing a trench wall in the ground using such a reinforcement cage.
Description
Die Erfindung betrifft einen Armierungskorb für ein Schlitzwandpanel, welches im Querschnitt im Wesentlichen viereckig mit einer Breitseite und einer Schmalseite ist, wobei der Armierungskorb gitterartig zusammengesetzte Armierungsstäbe aufweist, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a reinforcement cage for a trench wall panel, which is essentially square in cross section with a broad side and a narrow side, the reinforcement cage having reinforcing rods composed in a grid-like manner, according to the preamble of claim 1.
Die Erfindung betrifft weiterhin ein Verfahren zum Herstellen einer Schlitzwand im Boden aus einzelnen Schlitzwandpaneelen, wobei ein Schlitz im Boden erstellt wird, welcher mit einer aushärtbaren Masse verfüllt wird, wobei vor, bei oder nach dem Verfüllen mit der aushärtbaren Masse ein Armierungskorb in den Schlitz eingesetzt wird, gemäß dem Oberbegriff des Anspruchs 9.The invention further relates to a method for producing a diaphragm wall in the floor from individual diaphragm wall panels, a slot being created in the floor which is filled with a hardenable compound, a reinforcement cage being inserted into the slot before, during or after filling with the hardenable compound is, according to the preamble of claim 9.
Verfahren zum Herstellen von Schlitzwänden im Boden sind seit langem bekannt. Mittels einer Schlitzwandfräse oder eines Schlitzwandgreifers werden zunächst in einem definierten Abstand zueinander primäre Schlitzwandpaneele erstellt. Dies wird dadurch erreicht, dass ein ausgehobener Schlitz mit einer aushärtbaren Masse verfüllt wird, welche im Boden zu einem festen Schlitzwandpaneel aushärtet. Vor dem Aushärten wird zum Erreichen einer geforderten Festigkeit üblicherweise ein gitterartiger Armierungskorb aus Stahl eingesetzt. Nach dem Erstellen der primären Schlitzwandpaneele wird in dem jeweils dazwischen liegenden Zwischenraum ein sekundäres Schlitzwandpaneel erstellt. Dies erfolgt üblicherweise mittels einer Schlitzwandfräse, wobei der Abstand zwischen den nebeneinander liegenden primären Schlitzwandpaneelen so gewählt ist, dass die Fräsräder der Schlitzwandfräse die seitlich angrenzenden Schmalseiten anfräsen. Hierdurch kann eine besonders gute Verbindung zwischen den primären und den sekundären Schlitzwandpaneelen erreicht werden, um insbesondere eine gegen Durchtritt von Grundwasser dichte Schlitzwand zu bilden. Das Anfräsen der primären Schlitzwandpaneele kann zu einem erhöhten Verschleiß an den Fräsrädern der Schlitzwandfräse führen. Um Verschleiß zu reduzieren, wird das Erstellen der sekundären Schlitzwandpaneele insbesondere dann durchgeführt, wenn die aushärtbare Masse der primären Schlitzwandpaneele hinreichend verfestigt, jedoch noch nicht vollständig ausgehärtet ist. Ein erheblicher Verschleiß an den Fräsrädern kann sich jedoch dann einstellen, wenn der Armierungskorb aus Stahl in den überlappenden Bereich der Schlitzwandpaneele hineinragt und somit durch die Fräsräder angefräst wird. Der Kontakt der Fräszähne und der Fräsräder aus Metall mit dem Armierungskorb aus Stahl führt zu einem ganz erheblichen Verschleiß insbesondere an den Fräszähnen.Methods for producing diaphragm walls in the ground have been known for a long time. Using a trench wall cutter or a trench wall gripper, primary trench wall panels are first created at a defined distance from one another. This is achieved by filling an excavated slot with a hardenable compound which hardens in the ground to form a solid trench wall panel. Before hardening, a grid-like reinforcement cage made of steel is usually used to achieve the required strength. After the primary diaphragm wall panels have been created, a secondary diaphragm wall panel is created in the space in between. This is usually done by means of a trench wall cutter, the distance between the primary diaphragm wall panels lying next to one another being selected so that the cutting wheels of the trench wall cutter mill the laterally adjacent narrow sides. In this way, a particularly good connection between the primary and secondary diaphragm wall panels can be achieved in order to form, in particular, a diaphragm wall that is tight against the passage of groundwater. Milling the primary diaphragm wall panels can lead to increased wear on the cutting wheels of the diaphragm wall cutter. In order to reduce wear, the creation of the secondary diaphragm wall panels is carried out in particular when the hardenable mass of the primary diaphragm wall panels is sufficiently solidified, but not yet fully hardened. However, considerable wear and tear on the cutting wheels can occur if the steel reinforcement cage protrudes into the overlapping area of the trench wall panels and is thus milled by the cutting wheels. The contact of the cutting teeth and the cutting wheels made of metal with the reinforcing cage made of steel leads to considerable wear, especially on the cutting teeth.
Aus der
Weiterhin ist es aus der
Der Erfindung liegt die Aufgabe zugrunde, einen Armierungskorb für ein Schlitzwandpaneel und ein Verfahren zum Herstellen einer Schlitzwand im Boden anzugeben, mit welcher eine effiziente Herstellung einer Schlitzwand mit hoher Festigkeit bei einem geringen Verschleiß des Schlitzwandgerätes erzielt werden kann.The invention is based on the object of specifying a reinforcement cage for a diaphragm wall panel and a method for producing a diaphragm wall in the ground, with which an efficient production of a diaphragm wall with high strength can be achieved with little wear of the diaphragm wall device.
Die Aufgabe wird zum einen durch einen Armierungskorb mit den Merkmalen des Anspruchs 1 und zum anderen durch ein Verfahren mit den Merkmalen des Anspruchs 9 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen angegeben.The object is achieved on the one hand by a reinforcing cage with the features of claim 1 and on the other hand by a method with the features of claim 9. Preferred embodiments of the invention are given in the dependent claims.
Der erfindungsgemäße Armierungskorb ist dadurch gekennzeichnet, dass dieser zumindest in einem Seitenbereich, welcher einer der Schmalseiten des Schlitzwandpaneels zugeordnet ist, mit Glasfaserstäben ausgebildet ist.The reinforcement cage according to the invention is characterized in that it is formed with glass fiber rods at least in one side area which is assigned to one of the narrow sides of the diaphragm wall panel.
Die Erfindung beruht dabei auf der Erkenntnis, dass Glasfaserstäbe in einer ausgehärteten Verfüllmasse eines Schlitzwandpaneels, insbesondere in einer Betonmasse, eine hervorragende Armierung darstellen, welche vergleichbar mit einer Armierung aus Stahlstäben ist. Im Gegensatz zu Stahlstäben können jedoch Glasfaserstäbe durch die metallischen Fräszähne einer Schlitzwandfräse ohne Weiteres und mit einem relativ geringen Verschleiß an den Fräszähnen angefräst und überfräst werden.The invention is based on the knowledge that glass fiber rods in a cured filling compound of a diaphragm wall panel, in particular in a concrete compound, represent excellent reinforcement, which is comparable to reinforcement made of steel rods. In contrast to steel rods, however, glass fiber rods can easily be milled and milled over by the metal milling teeth of a trench wall milling machine and with relatively little wear on the milling teeth.
Des Weiteren wird mit der Erfindung erzielt, dass über einen relativ großen Bereich des Querschnitts eines Schlitzwandpaneels ein Armierungskorb angeordnet sein kann. Dies erhöht die Festigkeit eines Schlitzwandpaneels und damit die Gesamtfestigkeit einer so gebildeten Schlitzwand.Furthermore, the invention achieves that a reinforcement cage can be arranged over a relatively large area of the cross section of a trench wall panel. This increases the strength of a diaphragm wall panel and thus the overall strength of a diaphragm wall formed in this way.
Grundsätzlich kann der Armierungskorb insgesamt aus Glasfaserstäben als Armierungsstäbe aufgebaut sein. Im Hinblick auf Kosten ist es jedoch nach einer Weiterbildung der Erfindung bevorzugt, dass der Armierungskorb einen gitterartigen Grundkörper aufweist, welcher mit Armierungsstäben aus Stahl gebildet ist, und dass an dem Grundkörper mindestens ein Seitenbereich mit den Glasfaserstäben angeordnet ist.In principle, the reinforcement cage can be constructed entirely from glass fiber rods as reinforcement rods. In terms of costs, however, according to a further development of the invention, it is preferred that the reinforcement cage has a grid-like base body which is formed with steel reinforcement rods, and that at least one side area with the glass fiber rods is arranged on the base body.
Besonders bevorzugt ist es, dass an dem Grundkörper zwei Seitenbereiche mit Glasfaserstreben angeordnet sind. Die Seitenbereiche sind dabei auf die Schmalseiten des zu erstellenden Schlitzwandpaneels ausgerichtet. Grundsätzlich können dabei die Seitenbereiche mit dem Grundkörper eine gleiche Größe in Längs- oder Breitenrichtung des Schlitzwandpaneels aufweisen. Diese Größe ist vorzugsweise kleiner als die Länge des vorgesehenen Schlitzwandpaneels in Breitenrichtung.It is particularly preferred that two side areas with glass fiber struts are arranged on the base body. The side areas are aligned with the narrow sides of the diaphragm wall panel to be created. In principle, the side areas with the base body can have the same size in the longitudinal or width direction of the trench wall panel. This size is preferably smaller than the length of the intended diaphragm wall panel in the width direction.
Besonders vorteilhaft für eine Zentrierung des Armierungskörpers in dem Schlitzwandpaneel ist, dass der Armierungskorb mit den zwei Seitenbereichen aus Glasfaserstäben mindestens die Länge des Schlitzes in Breitenrichtung aufweist. Durch eine gewisse Elastizität der Glasfaserstäbe kann der Armierungskorb sogar in Breitenrichtung größer sein, wobei sich dieser dann an die bestehenden Seitenwände des Schlitzes flexibel anpasst. Hierdurch kann eine besonders zuverlässige Zentrierung des Armierungskorbes in dem Schlitz und damit in dem Schlitzwandpaneel erfolgen. Eine korrekte umfassende Armierung ist vorteilhaft für die Festigkeit des zu bildenden Schlitzwandpaneels.It is particularly advantageous for centering the reinforcement body in the trench wall panel that the reinforcement cage has two side areas Glass fiber rods at least the length of the slot in the width direction. Due to a certain elasticity of the glass fiber rods, the reinforcement cage can even be larger in the width direction, whereby it then adapts flexibly to the existing side walls of the slot. In this way, a particularly reliable centering of the reinforcing cage in the slot and thus in the diaphragm wall panel can take place. Correct comprehensive reinforcement is advantageous for the strength of the diaphragm wall panel to be formed.
Besonders vorteilhaft ist es nach einer Weiterbildung der Erfindung, dass sich die beiden Seitenbereiche bis an den Rand der Schmalseiten des zu bildenden Schlitzwandpaneels erstrecken und ein Abstands- oder Zentrierelement bilden.According to a development of the invention, it is particularly advantageous that the two side areas extend to the edge of the narrow sides of the trench wall panel to be formed and form a spacer or centering element.
Für ein besonders gutes und positionsgenaues Einbringen des Armierungskorbes ist es nach der Erfindung vorgesehen, dass in dem Seitenbereich zumindest einzelne Glasfaserstäbe sich in Längsrichtung des Armierungskorbes mit einer nach außen gerichteten konvexen Bogenform erstrecken. Diese Bogenform ist dabei so ausgebildet, dass diese sich zumindest nach unten hin und gegebenenfalls auch nach oben hin verjüngt, während eine maximale Breite in Breitenrichtung des Armierungskorbes in einem Mittenbereich gegeben ist. Durch diese zumindest teilweise Oval- oder Ellipsenform an den Außenbereichen kann der Armierungskorb durch diese bereichsweise konische oder sich verjüngende Gestaltung leicht in den Schlitz eingesetzt und so der Armierungskorb zuverlässig zentriert werden. Zudem wird durch diese Bogenform der seitlichen Glasfaserstäbe in Längsrichtung eine elastische Eigenschaft der Gestaltung der Seitenbereiche noch unterstützt.For a particularly good and precisely positioned introduction of the reinforcement cage, it is provided according to the invention that at least individual glass fiber rods extend in the longitudinal direction of the reinforcement cage with an outwardly directed convex arch shape. This arch shape is designed in such a way that it tapers at least downwards and optionally also upwards, while a maximum width in the width direction of the reinforcement cage is given in a central area. Due to this at least partially oval or elliptical shape in the outer areas, the reinforcing cage can easily be inserted into the slot due to this conical or tapering design in some areas and the reinforcing cage can thus be reliably centered. In addition, this curved shape of the lateral glass fiber rods in the longitudinal direction supports an elastic property of the design of the side areas.
Dabei ist es nach einer weiteren Ausführungsvariante besonders vorteilhaft, dass die Glasfaserstäbe auslenkbar an dem Grundkörper befestigt sind. Die auslenkbare Anbringung kann etwa mittels Bändern oder Drähten an dem Armierungskorb aus Metall erfolgen. Die hierdurch gebildete Verbindungsstelle erlaubt eine erhöhte Bewegbarkeit der Glasfaserstäbe.According to a further embodiment variant, it is particularly advantageous that the glass fiber rods are attached to the base body in a deflectable manner. The deflectable attachment can take place, for example, by means of bands or wires on the metal reinforcement cage. The connection point formed in this way allows increased mobility of the glass fiber rods.
Weiterhin umfasst die Erfindung ein Schlitzwandpaneel im Boden, welches dadurch gekennzeichnet ist, dass dieses mit einem der zuvor beschriebenen erfindungsgemäßen Armierungskörben gebildet ist. Das Schlitzwandpaneel ist dabei aus einer aushärtbaren Masse, insbesondere mit Beton, gegebenenfalls unter Einmischung des abgefrästen Bodenmateriales gebildet, wobei der Armierungskorb vor einem Aushärten der Masse in dem Schlitz im Boden eingesetzt ist.The invention further comprises a slotted wall panel in the floor, which is characterized in that it is formed with one of the reinforcement cages according to the invention described above. The diaphragm wall panel is made of a hardenable mass, in particular with concrete, optionally with the incorporation of the milled soil material formed, wherein the reinforcement cage is used in the slot in the ground before the mass hardens.
Weiterhin umfasst die Erfindung eine Schlitzwand im Boden, welche aus mehreren, aneinander angrenzenden Schlitzwandpaneelen gebildet ist, wobei mindestens ein Schlitzwandpaneel mit einem erfindungsgemäßen Armierungskorb vorgesehen ist.The invention further comprises a trench wall in the floor, which is formed from several trench wall panels adjoining one another, at least one trench wall panel with a reinforcement cage according to the invention being provided.
Vorzugsweise können die erfindungsgemäßen Armierungskörbe nur in den primären Schlitzwandpaneelen vorgesehen sein, zwischen denen zum Bilden der Schlitzwand dann die sekundären Schlitzwandpaneele durch Anfräsen der zuvor hergestellten und verfestigten primären Schlitzwandpaneele erfolgt. Grundsätzlich können aber in allen Schlitzwandpaneelen auch die erfindungsgemäßen Armierungskörbe vorgesehen sein, was die Logistik an der Baustelle erleichtert. Durch das vereinfachte Anfräsen der primären Schlitzwandpaneele beim Erstellen einer Schlitzwand erlaubt dies auch eine Erstellung der primären Schlitzwandpaneele mit einer erhöhten Toleranz. Dies kann zu einer Kostensenkung bei einem Bauvorhaben beitragen.The reinforcement cages according to the invention can preferably only be provided in the primary diaphragm wall panels, between which the secondary diaphragm wall panels are then made by milling the previously produced and consolidated primary diaphragm wall panels to form the diaphragm wall. In principle, however, the reinforcement cages according to the invention can also be provided in all diaphragm wall panels, which simplifies the logistics at the construction site. Due to the simplified milling of the primary diaphragm wall panels when creating a diaphragm wall, this also allows the primary diaphragm wall panels to be created with an increased tolerance. This can help reduce the cost of a construction project.
Hinsichtlich des Verfahrens zum Erstellen einer Schlitzwand ist die Erfindung dadurch gekennzeichnet, dass ein zuvor beschriebener erfindungsgemäßer Armierungskorb in den Schlitz eingesetzt wird. Mit dem erfindungsgemäßen Verfahren können die zuvor beschriebenen Vorteile hinsichtlich eines geringeren Verschleißes einer Schlitzwandfräse sowie des Erstellens einer Schlitzwand mit verbesserter Festigkeit und Dichtigkeit erzielt werden.With regard to the method for creating a diaphragm wall, the invention is characterized in that a previously described reinforcement cage according to the invention is inserted into the slot. With the method according to the invention, the advantages described above with regard to lower wear of a trench wall cutter and the creation of a trench wall with improved strength and tightness can be achieved.
Eine bevorzugte Ausführungsform des erfindungsgemäßen Verfahrens besteht darin, dass zunächst zwei voneinander beabstandete Primärschlitzwandpaneele im Boden erstellt werden, wobei in zumindest einem Schlitz für eines der Primärschlitzwandpaneele ein Armierungskorb mit Glasfaserstäben eingesetzt wird, und dass anschließend zwischen zwei primären Schlitzwandpaneelen ein Schlitz für ein sekundäres Schlitzwandpaneel durch Fräsen erstellt wird, wobei Seitenbereiche der primären Schlitzwandpaneele und darin angeordnete Glasfaserstäbe zumindest teilweise angefräst werden. Bei diesem Verfahrensschritt werden die Fräszähne der Fräsräder einer hierfür vorgesehenen Schlitzwandfräse beim Zerspanen von eventuell in den abzufräsenden Überlappungsbereich hineinragenden Glasfaserstäben nur einem relativ geringen Verschleiß ausgesetzt, welcher jedenfalls deutlich geringer als ein Verschleiß ist, welcher bei einem Anfräsen von metallischen Armierungsstäben auftreten würde.A preferred embodiment of the method according to the invention consists in that first two spaced primary diaphragm wall panels are created in the ground, with a reinforcement cage with fiberglass rods being inserted in at least one slot for one of the primary diaphragm wall panels, and then a slot for a secondary diaphragm wall panel is inserted between two primary diaphragm wall panels Milling is created, with side areas of the primary diaphragm wall panels and glass fiber rods arranged therein are at least partially milled. In this process step, the milling teeth of the milling wheels of a trench wall milling machine provided for this purpose become only a relatively small amount during the machining of glass fiber rods that may protrude into the overlap area to be milled Exposed to wear, which is in any case significantly less than wear that would occur if metal reinforcing rods were milled.
Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispieles weiter beschrieben, welches schematisch in der Zeichnung dargestellt ist.The invention is further described below with reference to a preferred embodiment which is shown schematically in the drawing.
Die einzige Zeichnung zeigt in einer teilgeschnittenen Querschnittsansicht einen Schlitz 7 im Boden 5. Der Schlitz 7 ist mit einem rechteckigen Querschnitt mit zwei Schmalseiten 8 und zwei zur Zeichnungsebene parallel verlaufenden Breitseiten 9 ausgebildet. In diesen Schlitz 7, welcher eine Tiefe von typischerweise zwischen 10 m bis 30 m oder tiefer aufweist, ist ein erfindungsgemäßer Armierungskorb 10 eingesetzt. Der Armierungskorb 10 weist einen etwa quaderförmigen Grundkörper 11 auf, welcher gitterartig aus Armierungsstäben 12 aufgebaut ist. Von den Armierungsstäben 12 sind in der Zeichnung die in Längsrichtung des Schlitzes 7 verlaufenden Armierungsstäbe 12 dargestellt, welche über nicht näher gezeigte horizontale oder in Querrichtung verlaufende Querstäbe vorzugsweise durch Verschweißen verbunden sind.The single drawing shows a partially sectioned cross-sectional view of a
An Seitenbereichen des Grundkörpers 11, welche den Schmalseiten 8 des Schlitzes 7 zugeordnet sind, sind in Längsrichtung verlaufende Glasfaserstäbe 20 gelagert, welche den seitlichen Außenbereich des Armierungskorbes 10 bilden. Die in Längsrichtung verlaufenden Glasfaserstäbe 20 sind mit einer konvexen Bogenform ausgebildet, was das Einsetzen des Armierungskorbes 10 in den Schlitz 7 erleichtert, welcher mit einer hier nicht dargestellten aushärtbaren Suspension, insbesondere einer Betonsuspension, zum Bilden eines Schlitzwandpaneels im Schlitz 7 verfüllt ist.On side areas of the base body 11, which are assigned to the
Die in Längsrichtung verlaufenden, gebogenen Glasfaserstäbe 20 sind über quergerichtete Träger 22 an den Armierungsstäben 12 des Grundkörpers 11 derart angebracht, dass sie fest oder auslenkbar oder in einer Querrichtung verschiebbar sind. Dies kann insbesondere dadurch erzielt werden, dass die quergerichteten Träger 22 nicht fest mit den Armierungsstäben 12 verbunden sind, sondern etwa durch Hülsen oder Drahtschlaufen auslenkbar angebracht und gelagert sind.The curved
Die Glasfaserstäbe 20 können beim Einsetzen des Armierungskorbes 10 in den Schlitz 7 bis an die Schmalseiten 8 des Schlitzes 7 heranreichen. Beim Erstellen eines benachbarten Schlitzes durch Fräsen kann das im Schlitz 7 erstellte Schlitzwandpaneel in einem Randbereich angefräst werden, wobei ein Anfräsen der Glasfaserstäbe 20 durch die metallischen Fräsräder der Schlitzwandfräsen ohne Weiteres möglich ist.When inserting the reinforcing cage 10 into the
Claims (10)
dadurch gekennzeichnet,
dass der Armierungskorb zumindest in einem Seitenbereich, welcher einer Schmalseite des Schlitzwandpaneels zugeordnet ist, mit Glasfaserstäben(20) ausgebildet ist.Reinforcement cage for a diaphragm wall panel which is essentially quadrangular in cross-section with a broad side (9) and a narrow side (8), the reinforcement cage (10) having reinforcing rods (12) composed in a grid-like manner,
characterized,
that the reinforcement cage is formed with glass fiber rods (20) at least in a side area which is assigned to a narrow side of the slurry wall panel.
dadurch gekennzeichnet,
dass der Armierungskorb (10) einen gitterartigen Grundkörper (11) aufweist, welcher mit Armierungsstäben (12) aus Stahl gebildet ist, und
dass an dem Grundköper (11) mindestens ein Seitenbereich mit Glasfaserstäben (20) angeordnet ist.Reinforcement cage according to claim 1,
characterized,
that the reinforcement cage (10) has a grid-like base body (11) which is formed with reinforcing rods (12) made of steel, and
that at least one side area with glass fiber rods (20) is arranged on the base body (11).
dadurch gekennzeichnet,
dass an dem Grundkörper (11) zwei Seitenbereiche mit Glasfaserstäben (20) angeordnet sind.Reinforcement cage according to claim 1 or 2,
characterized,
that on the base body (11) two side areas with glass fiber rods (20) are arranged.
dadurch gekennzeichnet,
dass sich die beiden Seitenbereiche bis an den Rand der Schmalseiten (8) des zu bildenden Schlitzwandpaneels erstrecken und ein Abstands- oder Zentrierelement bilden.Reinforcement cage according to claim 3,
characterized,
that the two side areas extend to the edge of the narrow sides (8) of the trench wall panel to be formed and form a spacer or centering element.
dadurch gekennzeichnet,
dass in dem Seitenbereich zumindest einzelne Glasfaserstäbe (20) sich in Längsrichtung des Armierungskorbes (10) mit einer nach außen gerichteten konvexen Bogenform erstrecken.Reinforcement cage according to one of Claims 1 to 4,
characterized,
that in the side area at least individual glass fiber rods (20) extend in the longitudinal direction of the reinforcement cage (10) with an outwardly directed convex arch shape.
dadurch gekennzeichnet,
dass die Glasfaserstäbe (20) auslenkbar an dem Grundkörper (11) befestigt sind.Reinforcement cage according to one of Claims 1 to 5,
characterized,
that the glass fiber rods (20) are attached to the base body (11) such that they can be deflected.
dadurch gekennzeichnet,
dass diese mit einem Armierungskorb (10) nach einem der Ansprüche 1 bis 6 gebildet ist.Slotted wall panel in the floor (5),
characterized,
that this is formed with a reinforcement cage (10) according to one of claims 1 to 6.
dadurch gekennzeichnet,
dass mindestens ein Schlitzwandpaneel nach Anspruch 7 vorgesehen ist,Trench wall in the floor (5), which is formed from several adjoining trench wall panels,
characterized,
that at least one diaphragm wall panel according to claim 7 is provided,
dadurch gekennzeichnet,
dass ein Armierungskorb (10) nach einem der Ansprüche 1 bis 7 in den Schlitz (7) eingesetzt wird.Method for producing a diaphragm wall in the floor (5) from individual diaphragm wall panels, whereby a slot (7) is created in the floor (5), which is filled with a hardenable compound, with a reinforcement cage (before, during or after the filling of the hardenable compound). 10) is inserted into the slot (7),
characterized,
that a reinforcement cage (10) according to one of claims 1 to 7 is inserted into the slot (7).
dadurch gekennzeichnet,
dass zunächst zwei voneinander beabstandete Primärschlitzwandpaneele im Boden erstellt werden, wobei in zumindest einem Schlitz (7) für eines der Primärschlitzwandpaneele ein Armierungskorb (10) mit Glasfaserstäben (20) eingesetzt wird, und
dass anschließend zwischen den zwei Primärschlitzwandpaneelen ein Schlitz (7) für ein Sekundärschlitzwandpaneel mittels Fräsen erstellt wird, wobei die Seitenbereiche der Primärschlitzwandpaneele und darin angeordnete Glasfaserstäbe (20) zumindest teilweise angefräst werden.Method according to claim 9,
characterized,
that first two spaced primary diaphragm wall panels are created in the ground, a reinforcement cage (10) with fiberglass rods (20) being inserted in at least one slot (7) for one of the primary diaphragm wall panels, and
that subsequently a slot (7) for a secondary diaphragm wall panel is created between the two primary diaphragm wall panels by means of milling, the side areas of the primary diaphragm wall panels and the glass fiber rods (20) arranged therein being at least partially milled.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19172482.2A EP3733975B1 (en) | 2019-05-03 | 2019-05-03 | Reinforcing cage and method for producing a slotted wall |
| PCT/EP2020/057291 WO2020224841A1 (en) | 2019-05-03 | 2020-03-17 | Reinforcing cage and method for producing a slotted wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19172482.2A EP3733975B1 (en) | 2019-05-03 | 2019-05-03 | Reinforcing cage and method for producing a slotted wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3733975A1 true EP3733975A1 (en) | 2020-11-04 |
| EP3733975B1 EP3733975B1 (en) | 2022-09-28 |
Family
ID=66397097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19172482.2A Active EP3733975B1 (en) | 2019-05-03 | 2019-05-03 | Reinforcing cage and method for producing a slotted wall |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3733975B1 (en) |
| WO (1) | WO2020224841A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1741837A1 (en) | 2005-07-05 | 2007-01-10 | BAM Civiel B.V. | Method for the construction of a diaphragm wall, as well as spacer |
| EP2553175A1 (en) | 2010-03-30 | 2013-02-06 | VSL International AG | Method and assembly for constructing a diaphragm wall |
| CN205399399U (en) * | 2016-03-16 | 2016-07-27 | 中冶集团武汉勘察研究院有限公司 | Underground continuous wall structure that adoption glass fiber reinforced overlap joint cover mills |
| WO2019063965A1 (en) * | 2017-09-29 | 2019-04-04 | Ccmj Systems Ltd | Spacers |
-
2019
- 2019-05-03 EP EP19172482.2A patent/EP3733975B1/en active Active
-
2020
- 2020-03-17 WO PCT/EP2020/057291 patent/WO2020224841A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1741837A1 (en) | 2005-07-05 | 2007-01-10 | BAM Civiel B.V. | Method for the construction of a diaphragm wall, as well as spacer |
| EP2553175A1 (en) | 2010-03-30 | 2013-02-06 | VSL International AG | Method and assembly for constructing a diaphragm wall |
| CN205399399U (en) * | 2016-03-16 | 2016-07-27 | 中冶集团武汉勘察研究院有限公司 | Underground continuous wall structure that adoption glass fiber reinforced overlap joint cover mills |
| WO2019063965A1 (en) * | 2017-09-29 | 2019-04-04 | Ccmj Systems Ltd | Spacers |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020224841A1 (en) | 2020-11-12 |
| EP3733975B1 (en) | 2022-09-28 |
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