EP1978159A1 - Coffrage pour étanchér des modules des rideaux souterrains - Google Patents

Coffrage pour étanchér des modules des rideaux souterrains Download PDF

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Publication number
EP1978159A1
EP1978159A1 EP07007042A EP07007042A EP1978159A1 EP 1978159 A1 EP1978159 A1 EP 1978159A1 EP 07007042 A EP07007042 A EP 07007042A EP 07007042 A EP07007042 A EP 07007042A EP 1978159 A1 EP1978159 A1 EP 1978159A1
Authority
EP
European Patent Office
Prior art keywords
segments
screed
concrete
slot
individual
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.)
Withdrawn
Application number
EP07007042A
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German (de)
English (en)
Inventor
Ralf Meyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bauer Spezialtiefbau GmbH
Original Assignee
Bauer Spezialtiefbau GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bauer Spezialtiefbau GmbH filed Critical Bauer Spezialtiefbau GmbH
Priority to EP07007042A priority Critical patent/EP1978159A1/fr
Publication of EP1978159A1 publication Critical patent/EP1978159A1/fr
Withdrawn legal-status Critical Current

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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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/16—Arrangement or construction of joints in foundation structures

Definitions

  • the invention describes a simply removable Abscgurohle for the production of watertight Betonierfugen in slot walls.
  • Scrapers according to the prior art consist of a few long elements that are rigidly connected to each other.
  • the rigid connection is necessary because the planks are usually solved by the concrete that heavy vibrators are placed on the air side, which must destroy the composite of the screed to the hardened concrete.
  • the vibrators with the required large vibrating energy are expensive and also the free shaking of the planks can take a longer period of time.
  • the construction of prior art shuttering systems is such that a sheet-wall-like profile is welded to a steel plate only a few centimeters thick. This Abschalsysteme thus have especially at the edges, where they are to seal against the diaphragm wall, a low height of only a few centimeters.
  • a coarse gravel is laid in layers behind the planks during the concreting process. This, in turn, can cause the gravel to run into wall areas of the later wall due to eruptions in the wall surface and cause gravel nests there.
  • the invention has the object to ensure a simple and safe removal of Abscschohlen.
  • the system should be usable for different slot lengths with minor changes.
  • a Abschalelement is lost with its entire length.
  • Another object is to use as little energy as possible in order to overcome the bond forces between the formwork element and the hardened concrete.
  • the Abschalsystem does not consist of long plank elements which are rigidly connected to each other, but consists of short screed segments, which are like a chain strung together.
  • adjacent screed segments are connected to one another in such a way that they can rotate relative to one another by an angle ⁇ at least about an axis lying transversely to the slot wall plane.
  • the connection is designed so that the rotation alone or can be done in addition with an increase in the distance between the two contact surfaces between the screed segments.
  • the connecting means with which two adjacent screed segments are interconnected, transmit tensile forces.
  • FIG. 1 shows a Abschalelement, which consists of individual screed segments 1.
  • the screed segments 1 are connected in this embodiment via ropes 5, which are guided through the interior of the screed segments 1.
  • the screed segments 1 contain recesses 6 for joint tapes.
  • FIG. 1 shows the device according to the invention after assembly and prior to installation in the slot.
  • FIG. 2 shows a suspension-filled slot 24 with baffles 22, in which an inventive Abschalelement is mounted.
  • this illustrated state 1 frictional contact is made between the individual screed segments. In this case, this is done by tensioning cables 5, which are tensioned against a transverse interception beam 20. The beam rests on the baffles 22.
  • These clamped screed segments 1 form a stiff long Abschalvorraum, which is arranged as close as possible to the grown bottom of the slot end 23.
  • FIG. 3 shows a single screed segment 1 with the embodiment that the connecting means of the individual screed elements made of ropes 5.
  • FIG. 4 shows a horizontal section through an embodiment, as in FIG. 3 shown.
  • FIG. 4a shows a horizontal section through a special embodiment according to the invention, in which the side cheeks 11 are conical.
  • FIG. 5 shows a vertical section through a device according to the invention, as it is removed again after concreting the neighboring lamella 13.
  • FIG. 6 shows a variant in which the individual screed segments 1 are connected to each other with different strap bolt systems.
  • the chain-like connection can once be like a pure joint, ie adjacent screed segments 1 can rotate about an essentially common pivot point against each other by an angle ⁇ .
  • ⁇ is the angle by which the single screed segment 1 turns out of the axis 29 of the entire Abschalelements.
  • the rotation can be supplemented by an angle ⁇ or by the fact that the distance 8 between the screed segments 1 is additionally increased.
  • the axis of rotation 19, preferably extends transversely to the slot wall plane. For later loosening of the screed is a movement of the individual screed segments around this axis most effective.
  • a possible rotational mobility in other directions can bring additional benefits in certain development situations, eg. B. when the slot is not in a straight plane.
  • the contact region 2 between two adjacent screed segments 1 is formed such that special contact surfaces 15 result. So that a rotation angle ⁇ around the axis 19 can result for the expansion, convex and concave mating surfaces are particularly well suited.
  • a preferred form of the curve line is the circle.
  • the curved, mating surfaces have the advantage that they form parts of a rotary joint along the contact surfaces, two adjacent screed segments 1 can move or rotate slidably.
  • the convex or concave shape has the further advantage that the individual screed segments 1 are largely arranged one above the other in a line. If the individual screed segments 1 were offset laterally in their axis, this would result in an irregular wall surface against which concrete would be concreted. In addition, there would be a risk that the joint tape would no longer be halfway down the full length in the recess 6. So the function of the joint tape would be significantly negatively affected.
  • the convex or concave configuration of the contact surfaces 15 does not determine the method.
  • the contact surfaces 15 could also be flat surfaces. In this case, it would be expedient to provide separate centering, so that the contact surfaces 15 do not move against each other. The centering could be done for example by tongue and groove systems or by nubs and associated recesses in the surfaces.
  • the contact surfaces 15 are formed so that no concrete or fine particles from the concrete fall into the contact areas between the individual screed segments 1 during the concreting process.
  • the concrete should not pass between the individual screed segments 1 into the area between the grown bottom 23 and the trailing edge of the scarfing device.
  • the contact surfaces 15 simultaneously serve to receive planar sealing elements 3, which prevent cement paste from reaching the connecting means during concreting.
  • the connecting means consist of wire ropes 5.
  • These wire ropes 5 are guided in tubes 25 through the screed segments. If cement paste penetrates into the annular space between the rope and the pipe, additional frictional forces must be overcome when the individual screed segments are later pulled out with the help of the wire ropes. That can complicate the expansion.
  • ropes 5 are used as connecting elements between the individual screed segments, then these ropes 5 can either be anchored in the lowest screed segment 1 'or the ropes 5 are deflected in the lowermost element in a U-shape.
  • the rope 5 has in this case at least twice the length of the entire Abschaliatas.
  • ropes are used as connecting elements, they are preferably guided in guide tubes 25 which run in the interior of the screed segment 1.
  • the connection of individual screed segments 1 could also be done on the outside running ropes. But this has the disadvantage that then the ropes would be contaminated by the concreting process, which would lead to separate expenses for the next use.
  • ropes come preferably wire ropes are used, since they can be handled very easily.
  • the ropes could also be articulated short rods or steel strands with single steel wires. They should show similar elastic behavior as ropes.
  • the system according to the invention has the advantage that in case of damage to the Abscquaintohle in a partial area only the corresponding screed segment must be replaced.
  • ropes or similar elastic means are used as connecting means between the individual screed elements, it is possible in a particularly simple way to combine the property of a swivel joint with the possibility of increasing the distance between two screed segments.
  • the effectiveness of the diagonal pull to detach the individual screed segments can be reinforced.
  • a further degree of mobility arises in the connection region 2, namely transversely to the slot plane.
  • the loosening of the screed segments 1 from the concrete is the easier the larger the horizontal component 12 'of the diagonal tension or the oblique tensile force 12, which is directed transversely to the system axis 29 of the Abscraumohle.
  • This diagonal pull is, for example, applied in the simplest way by pulling obliquely on the support beam 20 or the cables 5. This can be done by an excavator, crane, loader or by separate cables. The high wind tensile force of the existing diaphragm excavators can also be used.
  • the abutment for these gripping pulls is then preferably in the baffles 22 of the slot wall or in the concrete already produced slot wall elements. If the ropes are pulled at an angle, the flexibility and stretchability of the ropes in the contact surfaces 15 results in the effect of a swivel joint. At the same time, there is the possibility that the adjacent screed segments will move away from each other and slide slightly up the rope.
  • bolts and tabs can be used according to the prior art.
  • the adjacent screed segments may be interconnected by different embodiments 30, 31, 32, 33.
  • bolts 34 which are connected to the side surfaces of the screed segments 1 with perforated steel sheets 35.
  • the bolts 34 engage in circular holes 37 or slots 36. Slots allow both a rotation at the angle ⁇ and a displacement of the individual elements in the axial direction of the Abschalvorraum.
  • FIG. 4 shows a horizontal cross section through an inventive screed segment.
  • FIG. 4 a shows a further embodiment in which the side surfaces 11 of the screed segment are conical.
  • the conical design facilitates the dissolution process from the hardened concrete.
  • the individual screed segments 1 contain over their entire length recesses 6, in the elastic sealing strips 16 can be introduced.
  • the sealing strips 16 are inserted halfway into the recess 6 and with the free end they are embedded in concrete.
  • the sealing or joint tapes are designed so that during concreting no concrete can penetrate into the recess 6.
  • the chain of individual screed segments 1 is arranged as close as possible to the grown bottom 23.
  • the planar design of the side surfaces 11 has the advantage that the Abscgurohle can not be too easily laterally surrounded by the concrete, such as the thin sheets of flat sheets according to the prior art. Between the side surface 11 and the rough wall surface of the exposed diaphragm wall, there is a kind of tunneling effect, which prevents the fresh concrete from flowing around the Abscgurohle. The large aggregates of the concrete can spread more easily against each other, the flow is slowed down.
  • the screed segments 1 may consist of different materials or combinations of materials.
  • the cross-section consists essentially of a quadrangular body whose width is slightly smaller than the planned slot wall width and whose depth 17 is in a preferred order of 10 to 50 cm, depending on the thickness and depth of the slot wall.
  • this body or in a preferably conically molded part 18 there are one or more slot-like recesses 6, which is chosen so large that they can accommodate about half the width of a sealing or joint tape 16.
  • the conical Anformung 18 has the advantage that on the one hand the screed segment 1 can be easily removed from the hardened concrete.
  • a conical recess is formed in the hardened concrete, in the shelter of which the second half of the sealing strip 16 lies after removal of the Abscraumohle.
  • the sealing strip is particularly protected in this way in the further excavation activities of the diaphragm wall production.
  • the body of the screed segments may be welded from sheets and to increase the flexural rigidity this construction may be reinforced with sectional steels such as double T-beams, T-beams, angle irons, pipes, etc.
  • the body can also be made of plastic and there especially for reasons of price made of recycled plastic. So that the plastic device does not float when concreting, it may be appropriate to complain with steel structures. In addition, it may be appropriate to protect certain parts of the plastic surface with steel surfaces particularly against wear.
  • the steel shell can also be filled with concrete.
  • the screed segments 1 is in concrete or reinforced concrete. Also in this variant, it is expedient to perform special wear surfaces or contact surfaces in steel.
  • the body can be made of a steel fiber concrete.
  • the screed segments In order for the screed segments to be usable for all slot widths, it is expedient to be able to detachably fasten widening elements 10 to the main body.
  • the attachment can be done by screwing or by arranging a tongue and groove system.
  • the outer boundary surfaces 17 and 11 may be arranged parallel to each other or slightly conical.
  • the conical shape may have the same direction as the molded part 18. In this way, the removal of the screed segment is greatly facilitated.
  • a preferred form of the connecting means between the individual screed segments are wire ropes 5, by which the individual elements can be clamped together and thus creates a stiffened on the entire length Abschalelement.
  • wire ropes it is also possible to use single rods which are articulated and tension-connected, whose individual lengths and joints are matched to the length of the screed segments.
  • elastic prestressing steel strands with several individual wires can be used.
  • the number of screed segments necessary for the slot wall depth are placed in a row and then closed with the connecting means into a chain.
  • either the ropes 5 are pulled by predetermined tubular recesses 25.
  • the rope is pulled through a recess, deflected in the last element and passed through the other recess back to the earth's surface.
  • the cable ends are pulled through a scraper beam 20.
  • the individual screed segments can be clamped together and in this way arises from the individual screed segments 1 over the entire length a relatively stiff Abschalelement.
  • the tensioning of the ropes can be done before pulling in the vertical direction or the tightening can only take place when the device is already lowered in the slot.
  • the clamping together of the individual screed segments is not procedural mandatory. It is expedient, however, that the contact areas 2 are minimized and concrete can not get into the contact surfaces 15. It may be desirable for the chain of individual screed segments to press lightly against the pending floor 23 under the concrete pressure during the paving process. It then results in no straight concreting, but a slightly irregular polygonal-shaped joint, but this has no adverse consequences for the expansion and the subsequent Andichtung when concreting the new slot. If wire cables or similar elements are used as connecting means, it is important that sealing elements 3 are arranged in the contact region 2 or on the contact surfaces 15.
  • the sealing elements 3 prevent cement paste discharged from the concrete from running into the recess tubes 25. If you want to reassemble the Absc Halbohle, then due to increased friction effects, the ropes could not easily pull out.
  • the sealing elements 3 are preferably made of elastic materials, such as rubber or EPDM. It may also be compressible disposable materials, which are rearranged each time in the contact area 2. This can z. B. planar fabrics, nonwovens, plastics, foam boards and natural fiber products, etc., which are compressible.
  • a special shape of the contact surfaces 15 can cause the individual screed segments already close fit due to their own weight largely close to each other.
  • the contact surfaces 15 between the adjacent screed segments 1 are preferably executed curved. It is advisable to perform piece and counterpart with the same curvature, so that the elements along these curved surfaces can make a twist to each other.
  • the exemplary surface shape is modeled on the circular curvature.
  • the curvature line can also be composed of individual polygons. Since the Abscschohlenkette to be removed for removal in the newly manufactured and filled only with suspension slit wall plane, it is desirable that the individual elements can rotate at least about axes 19 which extend transversely to the slot plane. In principle, however, it is not harmful if in addition still a rotation in other directions, such as about axes of rotation which extend in the slot wall plane. This brings advantages if the diaphragm wall was not sunk absolutely vertically.
  • the Abschalvoruze not be placed on the sole of the slot, it is appropriate that the device is intercepted on the baffle 20 on the baffle 22. In this case, the ropes 5 should then be biased so far that the contact areas 2 are as small as possible and a tightness between the contact surfaces 15 occurs.
  • plates or tabs 35 and axles or bolts 34 may be used as connecting elements between 2 adjacent screed segments 1 .
  • the connection is then similar to a bicycle chain.
  • the removal process also has a possibility that the contact areas 2 open, ie that the contact surfaces 15 solve each other when unscrewing the individual elements, it is expedient that not only performs the holes in the tabs circular, but oblong shapes 36 selects. At least in tabs with slots, it may be appropriate to additionally clamp together the individual elements with ropes 5. This is the only way to ensure that the contact surfaces 15 lie on one another and that the individual screed segments are connected tightly to one another.
  • the slot is concreted.
  • the protruding from the recesses 6 joint tape 16 is embedded in concrete.
  • a new trench wall slat under suspension support is produced on the side facing away from the joint strip.
  • This guide can for example consist of groove-like recesses in the individual screed segments 1, in which the gripper or chisel can be guided close to the surface to the final depth. In this way, it is also ensured that the necessary clearance is given in the slot to detach the individual screed segments.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Road Paving Machines (AREA)
EP07007042A 2007-04-04 2007-04-04 Coffrage pour étanchér des modules des rideaux souterrains Withdrawn EP1978159A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07007042A EP1978159A1 (fr) 2007-04-04 2007-04-04 Coffrage pour étanchér des modules des rideaux souterrains

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07007042A EP1978159A1 (fr) 2007-04-04 2007-04-04 Coffrage pour étanchér des modules des rideaux souterrains

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EP1978159A1 true EP1978159A1 (fr) 2008-10-08

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EP07007042A Withdrawn EP1978159A1 (fr) 2007-04-04 2007-04-04 Coffrage pour étanchér des modules des rideaux souterrains

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EP (1) EP1978159A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108824486A (zh) * 2018-08-22 2018-11-16 北京九州动脉隧道技术有限公司 一种水下桥对接系统
CN108951965A (zh) * 2018-10-10 2018-12-07 三筑工科技有限公司 隔墙系统及其安装方法
EP3945163A1 (fr) * 2020-07-30 2022-02-02 Stump-Franki Spezialtiefbau GmbH Procédé de fabrication d'une paroi destinée à la réduction des secousses du sol

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3430789A1 (de) * 1984-08-22 1986-03-06 Ed. Züblin AG, 7000 Stuttgart Verfahren zum einbringen und verbinden von membranen in schlitzwaenden und vorrichtung zur durchfuehrung des verfahrens
DE9320134U1 (de) * 1993-12-23 1994-04-21 Ibs Injektionstechnologie Gmbh Niederlassung Berlin, 10245 Berlin Injizierbare Fugenschiene
EP0789116A1 (fr) * 1996-02-09 1997-08-13 Willibald Fischer Elément de coffrage
EP1627978A2 (fr) * 2004-08-19 2006-02-22 FWR Solutions GmbH Élément de coffrage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3430789A1 (de) * 1984-08-22 1986-03-06 Ed. Züblin AG, 7000 Stuttgart Verfahren zum einbringen und verbinden von membranen in schlitzwaenden und vorrichtung zur durchfuehrung des verfahrens
DE9320134U1 (de) * 1993-12-23 1994-04-21 Ibs Injektionstechnologie Gmbh Niederlassung Berlin, 10245 Berlin Injizierbare Fugenschiene
EP0789116A1 (fr) * 1996-02-09 1997-08-13 Willibald Fischer Elément de coffrage
EP1627978A2 (fr) * 2004-08-19 2006-02-22 FWR Solutions GmbH Élément de coffrage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108824486A (zh) * 2018-08-22 2018-11-16 北京九州动脉隧道技术有限公司 一种水下桥对接系统
CN108951965A (zh) * 2018-10-10 2018-12-07 三筑工科技有限公司 隔墙系统及其安装方法
EP3945163A1 (fr) * 2020-07-30 2022-02-02 Stump-Franki Spezialtiefbau GmbH Procédé de fabrication d'une paroi destinée à la réduction des secousses du sol

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