EP0348870B1 - Construction constituée par l'assemblage d'éléments préfabriqués en béton armé utilisant la technique du béton précontraint - Google Patents

Construction constituée par l'assemblage d'éléments préfabriqués en béton armé utilisant la technique du béton précontraint Download PDF

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Publication number
EP0348870B1
EP0348870B1 EP89111620A EP89111620A EP0348870B1 EP 0348870 B1 EP0348870 B1 EP 0348870B1 EP 89111620 A EP89111620 A EP 89111620A EP 89111620 A EP89111620 A EP 89111620A EP 0348870 B1 EP0348870 B1 EP 0348870B1
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EP
European Patent Office
Prior art keywords
bridging
structural member
member according
tube
sleeve
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Expired - Lifetime
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EP89111620A
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German (de)
English (en)
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EP0348870A1 (fr
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Werner Zapf
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Individual
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Individual
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Priority claimed from DE19883821626 external-priority patent/DE3821626A1/de
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/10—Ducts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02—Containers for fluids or gases; Supports therefor
    • E04H7/18—Containers for fluids or gases; Supports therefor mainly of concrete, e.g. reinforced concrete, or other stone-like material
    • E04H7/20—Prestressed constructions

Definitions

  • the invention relates to a structure composed of several prefabricated reinforced concrete parts and connected at the joints with hardening filling compound in a prestressed concrete construction.
  • a structure is e.g. known from DE-B1-15 59 491.
  • This previously known structure is primarily composed of plate-shaped prefabricated parts.
  • the invention relates generally to structures according to the preamble of claim 1 and is primarily, but not exclusively, concerned with such structures, the reinforced concrete parts of which complement one another to form a cylindrical container.
  • the preamble of claim 1 is related to FR-A-25 96 439, which will be discussed in more detail later.
  • the invention relates to the special form of a prestressed concrete construction, in which the prestressing elements are only introduced subsequently into prefabricated reinforced concrete parts.
  • cladding pipes are embedded in the individual prefabricated reinforced concrete parts, through which the tendons can be retracted and in which they can stretch and shift for tensioning.
  • This prestressed concrete construction is chosen if several precast reinforced concrete parts are to be connected to each other in a load-bearing manner. It is common, but not absolutely necessary in all cases, and is therefore only optional, according to the invention, to subsequently at least partially fill the space between the cladding tubes and the tendons with injection mortar.
  • the joints between each other subsequent prefabricated reinforced concrete parts connected with hardening filling compound usually a grout.
  • tensioning strands or monostrands are used as tensioning elements, which are composed of individual wires and generally consist of corrodible, high-strength tensioning steel which is arranged within a plastic sheathing with grease filling. This is to avoid steel corrosion, e.g. under the influence of water or even aggressive liquids which are kept in the container. It will be shown that the invention creates more advantageous conditions, so that other tendons can be used, possibly even those with a corrodible surface.
  • the invention relates in particular to such a structure, which is still movable as a whole, because the filling compound has not yet been introduced into the joints between the precast reinforced concrete parts and possibly the injection mortar. It is then a movable coherent preliminary product of the finished building.
  • the invention also deals with the finished structure, in which the filling compound and possibly the injection mortar have already hardened. Finished structures of this type can be immovably erected on site from the prefabricated movable reinforced concrete parts.
  • the tendons are usually only tensioned after the filling compound has hardened in the joints between the precast reinforced concrete elements.
  • the injection mortar can be introduced before or after tensioning.
  • bridging pipes are used in the area of the fingers between neighboring prefabricated reinforced concrete parts, which penetrate with their two free ends into the recesses of the neighboring prefabricated reinforced concrete parts and connect there to recessed ends of the cladding pipes, the respective bridging pipe being one has the inside cross section corresponding to the inside cross section of the cladding tubes.
  • the end face of the connecting tube protruding radially beyond the outer cross section of the cladding tube is tightly connected to the base of the respective recess by means of a plastic cement.
  • FR-A-25 96 439 compares the invention to that of the invention DE-B1-15 59 491 as far as a recess provided in connection with the joint interface is conical and merges into a tapered area in the interior of the precast reinforced concrete part, into which a cladding tube of the precast reinforced concrete part opens and the one into the joint inserted bridging pipe of the respective pressure-tight channel 8, which in each case continues over the relevant cladding pipe between adjacent prefabricated reinforced concrete parts.
  • the cladding tubes of two adjacent concrete blocks in particular are to be aligned as precisely as possible with one another.
  • the inner surface of the conically widening area of the recess is used as a sealing and supporting surface for a sealing sleeve with a cross-section widening conically from the inside to the outside.
  • This sealing sleeve serves to force-center the cladding pipes concreted in the two adjacent concrete blocks relative to one another.
  • the rubber-elastic material of the sealing sleeve which can be compressed to different extents, is also intended to compensate for size tolerances in the dimensions of the two adjacent concrete blocks or their recesses.
  • the joints between the individual reinforced concrete components on the one hand and the spaces around the tendons on the other hand, even in the joint area, are separated from one another, so that there is a completely free choice for the fillings of the joints and possibly the injection mortar.
  • the pressure-tight design of the continuous encapsulation of the tendons between the individual prestressed concrete parts also ensures that injection mortars are injected at a relatively high pressure and thus the formation of voids around the tendons can be avoided practically reliably.
  • tendons with a corrodible surface can also be used without any problems by suitable choice of injection mortar.
  • the claim e. takes into account the formation of the pipe connections at both ends of the respective bridging pipe as rubber-elastic joints.
  • Sealing elements which are expediently made of resilient material, for example of rubber or a rubber substitute, can serve as rubber-elastic joints. These sealing elements can possibly even be firmly attached to a pipe of the pipe connection, for example vulcanized or glued on. Usually, however, a form-fitting or even a frictional arrangement is sufficient.
  • the reinforced concrete of the individual prefabricated reinforced concrete parts is sufficiently pressure-tight, even for injection mortar introduced under higher injection pressure.
  • the sealing element must therefore primarily ensure a seal with respect to the joint areas between adjacent prefabricated reinforced concrete parts. It is therefore sufficient in many cases if the sealing element is arranged only on the circumferential side of the channel-forming pipe in question and injection mortar at the connection points between adjacent channel-forming pipes within the precast reinforced concrete parts slightly oozes out into contact with the reinforced concrete of the precast element concerned.
  • the rubber-elastic properties of a sealing element made of a corresponding material can additionally be used for a joint function if adjacent reinforced concrete prefabricated parts are arranged relative to one another in the structure with a slight lateral offset in the joint area.
  • the bridging tube in which a sealing element is provided at both ends as a rubber-elastic joint, even enables particularly great lateral mobility in the manner of a double joint. Due to its elasticity in form, the sealing element also serves as a means of holding the bridging tube inserted into the prefabricated reinforced concrete part in question. It is fundamentally possible that the sealing elements are also axially clearly offset from the free ends of the channel-forming tubes.
  • the cladding pipes concreted in the individual reinforced concrete parts are communicatively connected to one another by additional bridging pipes arranged in the joint areas between the reinforced concrete parts, protruding ends of the cladding pipes can be avoided in the joint areas, which appear to be unfavorable in terms of transport and installation technology.
  • the bridging pipes can, for example, only be inserted into the joint boundary surface of the individual prefabricated reinforced concrete parts immediately before the assembly of the structure according to the invention will.
  • DE-B1-15 59 491 it is ensured in particular that when the tendons are pulled into the continuous pressure-tight channels, no or at least slight mechanical inhibitions result from the use of the bridging tubes. Rather, this type of construction results in a double-jointed and resilient tolerance compensation.
  • a main feature of the invention is therefore to create a rubber-elastic joint between a cladding tube firmly concreted in the precast reinforced concrete part and a bridging tube that can be angled relative to it and bridges the joint, by providing an elastic seal that is suitable for the function of the rubber-elastic element within the tapered area between the
  • the outer circumferential surface of the pipe part bridging the joint on the one hand and the inner circumferential surface of the tapered region on the other hand is arranged, in accordance with FR-A-25 96 439 the cladding tube firmly concreted in the reinforced concrete precast part opens into the tapered region.
  • the pipe connection is sealed within the tapered area and designed for the arbitrary adjustment of the desired angle as a rubber-elastic joint arranged at the base of the insertion funnel.
  • the space between the tensioning strands and the cladding tubes is first sprayed and only then the tensioning strands are tensioned, since this tensioning is no longer a Forced centering function as in the case of FR-A-25 96 439. Rather, the invention enables free axial adjustment in the tapered areas.
  • Claim 2 provides a possibility in which a bridging of the joints between adjacent prefabricated reinforced concrete parts is provided by a telescopically displaceable member, which can be completely or substantially pushed into the respective prefabricated reinforced concrete part in the transport state. This is not only important with regard to the possibility of transport, but also when a ring-shaped, closed structure has to be supplemented with the last precast reinforced concrete part. While the individual elements of the ring can be inserted into one another in the circumferential direction in the case of an incomplete ring-shaped arrangement, there are difficulties with the radial insertion of the last prefabricated reinforced concrete part into the then closed ring, for example the wall of a cylindrical container (cf. also claim 13).
  • Claim 4 relates to the preferred case of actuation of the telescopic member by means of a pressure medium.
  • an actuation by means of sufficiently flowable pressure-transmitting cement mortar is preferably envisaged, which at the same time ensures that the telescopic member is locked in the extended position after it has solidified.
  • additional security measures would have to be taken, for example, securing end positions.
  • Such a cement mortar would also close a channel in the precast reinforced concrete part through which the pressure medium is applied.
  • the sealing element used in each case represents a rubber-elastic joint that is used when the pipe is bent.
  • Such a pipe bend does not represent a disproportionate resistance to the desired tolerance compensation in the dimensions and dimensions considered here.
  • the sealing element which is designed as a rubber-elastic joint, can also serve as the piston of a link that is telescopically displaceable on or in the cladding tube, the bridging sleeve, whereby according to claim 9, the sealing element serving as a piston preferably also seals against an intended sliding guide.
  • the sealing element provided as a rubber-elastic joint is supported on the outside of the concrete of the precast reinforced concrete element (cf. claim 8).
  • the sealing element can also be supported on the outside on a bulge of the cladding tube, this bulge in turn, if necessary, in turn being supported on the concrete of the precast reinforced concrete part, but need not be.
  • the structure according to the invention is also particularly suitable for the production of a cylindrical container in which the reinforced concrete precast elements are located complement to the container jacket (claim 13).
  • large-format structures are addressed, with diameters of six to thirty meters and more and heights of three to eight meters and more being typical in the case of a cylindrical container.
  • the sealing elements serving as rubber-elastic joints have been represented as compression seals.
  • a lip seal is used in a certain arrangement instead. Their sealing effect is only created by a compression agent between the lips.
  • the compression medium can be the injection mortar when the cladding tubes are concreted in the individual prefabricated reinforced concrete parts, which can also get between the sealing lips at a joint between the cladding tubes and the bridging tubes (or bridging sleeves as defined in claim 2).
  • a telescopically movable bridging sleeve is thereby hydraulically shifted into its extended operating position by using an injection mortar supplied from the outside through its own channel in the prefabricated reinforced concrete part, which then hardens to form a spray compound.
  • injection mortar injected into the cladding tubes between the end face of the cladding tube within the bridging sleeve and the end of the joint facing away from it under the lip abutting the bridging sleeve the lip seal can creep backwards towards the joint; however, the fugue should just be in the frame the invention of injection mortar injected into the cladding tubes are kept free. This can be prevented in such a way that, according to claim 15, the shaft of the lip seal is radially prestressed on the bridging sleeve, as is the case from the outset with a compression seal.
  • a support ring pushed onto the shaft of the lip seal on the outside preferably serves to produce the prestress (claim 16).
  • the lips of the lip seal do not need to rest directly on a pipe forming the continuous pressure-tight channel or on the concrete of the precast reinforced concrete part, but it is also sufficient if the seal is made against an intermediate part which is tightly connected to the parts mentioned.
  • the guide part forming a sliding guide for the bridging sleeve is considered within the meaning of claim 7.
  • the bridging pipes can be provided as spacers between adjacent prefabricated reinforced concrete parts and indirectly form their joints within the tolerances that occur in practice. Tolerances can occur both when the bridging pipes are supported on the precast reinforced concrete elements and with regard to the distance between the supporting points and the joint-forming surfaces of the respective precast reinforced concrete element. An equidistance of the joints is therefore possible as part of this further training idea, but the adjustment of the width of the joints can also consciously accept the tolerances mentioned.
  • a sealing element provided as a rubber-elastic joint is axially supported on a projection of a tube forming a continuous pressure-tight channel.
  • a bridging sleeve according to claim 2 which is axially telescopically displaced, but may also be of general importance for the bridging pipes.
  • Claim 20 provides that in such a case To form a projection as a bead. In this way, material can be saved on the one hand, for example by producing the pipe in question with an essentially constant pipe thickness. In addition, a relatively simple manufacture is possible by inflating the tube in question against an external shape by means of an inflatable pressure body introduced, for example in the form of a plastic tube.
  • claim 21 provides a second function for the projection in the event that the projection is formed on a bridging sleeve according to claim 2 is. Then the projection can serve in particular in the case of claim 5, but possibly also without its feature, as a sliding guide element in the telescopic displacement of the bridging sleeve.
  • claim 22 then provides a further central projection, which in the sense described can also be formed as a bead, but does not have to be, and which as an additional intermediate guide of the bridging sleeve during its telescopic extension before reaching a radially holding engagement in the opposite precast reinforced concrete part.
  • claim 24 provides for the bridging pipes or the bridging sleeves to be produced from the same prefabricated structures in order to reduce the parts requirement. You can also use the middle projections according to claim 22 for the bridging tubes, although they no longer perform a function, but are also not a hindrance. On the other hand, there has been the possibility, in particular, of obtaining bridging sleeves simply by cutting bridging pipes at the end.
  • the rubber-elastic joints which are formed by the sealing elements, are preferably preassembled on a pipe of the respective pipe connection (claim 25).
  • the preassembly is expediently carried out only on the respective bridging pipe (claim 26), whereby the advantage of the double-joint effect is still combined with an easier assembly.
  • FIGS. 1 to 3 have the following in common: Cylindrical cladding tubes 4, preferably made of plastic or another material, are concreted into the concrete of prefabricated reinforced concrete parts 2.
  • the cladding tubes 4 of the individual prefabricated reinforced concrete parts are ideally axially aligned with one another in the structure. In practice, there can be a certain lateral displacement in relation to one another in all embodiments when the reinforced concrete prefabricated parts are assembled to form the structure. But even then, the cladding tubes 4 of adjacent reinforced concrete prefabricated parts 2 should still be arranged approximately in alignment so that a common tendon, not shown, can be drawn into the cladding tubes 4 of adjacent reinforced concrete precast elements. These tendons have an outer diameter that is significantly smaller than the inner diameter of the cladding tubes 4. The remaining space is filled as completely as possible with injection mortar, also not shown.
  • FIGS. 1 to 3 represent different means with which the cladding tubes 4 extend over the area of the joints 6 between adjacent ones Precast reinforced concrete parts 2 are connected together to form continuous pressure-tight channels 8 for the tendons.
  • tubes which form the channels 8 stand out continuously at least at a joint interface 10 or in an extended state in the assembled state. Their assembly is facilitated in view of the possibility of a certain lateral offset of adjacent reinforced concrete prefabricated parts 2 in that a conical recess 12 with a taper into the reinforced concrete prefabricated part 2 extends from the joint interface 10 and, like a funnel, facilitates the "threading process" of the above free pipe ends.
  • the practical reinforced concrete prefabricated parts and the structures made from them can have the respective representation in multiple versions; only the connection area along a tendon in the joint area between two adjacent precast reinforced concrete parts is shown. The connection to other prefabricated reinforced concrete parts is corresponding.
  • 1 relates to a case in which the continuous pressure-tight channels 8 are each formed from cladding tubes 4 which follow one another via a bridging tube 24.
  • the cladding tube 4 is set back relative to the joint interface 10 there. The free end of the cladding tube 4 opens into the recessed area 16.
  • the sealing elements 20 are arranged around the two free ends 14 of the bridging tube 24.
  • the sealing element 20 is on the one hand sealing against the circumference of the bridging tube 24 penetrating it and on the other hand also sealing against the lateral surface of the tapered region 30 of the conical recess 12, which at the same time serves as an external support.
  • the respective sealing element 20 fulfills the function of a rubber-elastic joint, but in which the mutually facing free ends of the two cladding tubes are somewhat offset from one another.
  • the conical recesses 12 are arranged on both prefabricated reinforced concrete parts and allow a certain lateral deflection in the prefabricated reinforced concrete part as well as an articulated pivoting of the bridging tube 24.
  • the hatched concrete of the prefabricated reinforced concrete parts is sufficiently tight against injection mortar injected with pressure into the space between the tendons and the cladding tubes 4. Since, with regard to the certain lateral displacement and pivoting of the ends of the cladding tubes and in particular the bridging tube 24, there remains a small gap in the respective connection area 18, it is permissible for the respective space 22 between the connection area 18 and the sealing element 20 to be outside the cladding tube 4 and within the conical recess 12 is refilled by the injection mortar in the finished assembled structure.
  • the individual tubes 4 and 24 forming the channel 8 are arranged axially opposite one another.
  • the space 22 which can subsequently be filled with injection mortar is in duplicate in each of the two Precast reinforced concrete parts available.
  • the respective sleeve-shaped sealing element 20 is therefore arranged at the respective free end 14 of the bridging tube 24 and has no axial offset with respect to the connection area 18.
  • the sealing element 20 has an essentially angular cross section, the axially extending leg of which is formed by the sleeve-shaped shape of the sealing element and which has an inwardly directed angle leg 26 which rests like a perforated diaphragm on the end face of the respective free end 14 of the bridging tube 24.
  • the hole diameter of the annular diaphragm formed by the angle leg 26 corresponds approximately to the inside diameter of the cladding tubes 4.
  • the free ends 14 of the bridging tube 24 are so drawn in relative to their central region that their inner cross section there is also adapted to that of the respective cladding tube 4 to allow trouble-free pushing of the tendons in the connection areas 18.
  • the bridging tube 24 can have a somewhat larger internal cross section in the middle longer region, without this being a mandatory condition.
  • the angle leg 26 of the sealing element 20 rests against a shoulder 28 in the concrete of the prefabricated reinforced concrete part 2, which axially supports the sealing element and expediently compresses it so far in the support state that in transition from the cladding tube via the angle leg 26 in the bridging tube 24 ensures a continuous course of the inner surface of the channel 8.
  • the same shoulder 28 is formed, but here only as a delimitation of a recess for receiving the sealing element 20, which is arranged here in the relaxed state at a distance from the shoulder 28.
  • the shoulder 28 serves only as an end stop and thus prevents the sealing element 20 from being lost from the bridging tube 24.
  • the sealing elements 20 are not in one area supported the same slope of the conical recess 12, but on a greatly weakened conical region 30, so that the radial deformation of the sleeve-like sealing element 20 varies only slightly over its axial length.
  • the area 30 can be strictly cylindrical in a manner not shown or can even expand somewhat into the prefabricated reinforced concrete part 2 in a manner not shown either, so that the sealing element cannot be lost when the bridging tube 24 has not yet been inserted or after insertion.
  • the sealing element 20 is preferably preassembled on the bridging tube 24 and introduced together with the latter.
  • FIGS. 2 and 3 varies the concept of a bridging tube 24 according to FIG. 1 in such a way that the bridging tube is here guided as a bridging sleeve 32 on the free end 34 of the cladding tube that still ends within the precast reinforced concrete element 2. Accordingly, around the free end 34 there is a cylindrical displacement space 36 in the reinforced concrete of the reinforced concrete prefabricated part 2, which adjoins the narrow cross section of the conical recess 12 into the reinforced concrete prefabricated part 2.
  • the lateral surface of the displacement space 36 is cylindrical and is formed by a sleeve 38 concreted in concrete in the precast reinforced concrete part 2 with an inner cylindrical sliding surface 40.
  • This serves as an external guide for an axial displacement movement of the again sleeve-shaped rubber-elastic sealing element 20, which is arranged in the manner of the left or right partial image of FIG. 1 at the inner end 42 of the bridging sleeve 32.
  • Both sealing elements 20 are in each case on their opposite end faces an annular collar-like projection 44 in addition to securing by means of the angle leg 26 against axial displacement towards the center of the bridging sleeve 32.
  • a corresponding variant of the seal design and arrangement can also be provided in the case of the other embodiments.
  • the radial end face of the angled leg 26 provides a piston surface 46 for a function of the sealing element, in which it serves as a piston for the axial displacement of the bridging sleeve along the telescopic adjustment distance on the free end 34 of the relevant cladding tube 4 .
  • the stroke volume of the piston is limited on the side opposite the sealing element within the precast reinforced concrete part 2 by an annular shoulder 48, at which the displacement space ends.
  • an injection channel 50 for injection cement leads to the outside in the precast reinforced concrete part 2, through which injection mortar can be injected, which is suitable as a pressure medium, in order to remove the bridging sleeve 32 from the retracted state shown in FIG.
  • the bridging sleeve performs the same functions as the bridging tube 24 according to the arrangements according to FIG. 1.
  • the sealing element 20 at the same time brings about a seal with respect to the cladding tube 4 and also with respect to the sliding surface 40, against which, in any case, it comes into sealing contact over a significant axial distance.
  • the sealing element 20 arranged at the free end 52 of the bridging sleeve 32 is carried by the bridging sleeve 32 when changing from the arrangement according to FIG. 2 to the arrangement according to FIG. 3.
  • the invention relates to both the preassembled structure, in which no injection mortar has been injected into the cladding tubes and the joints have not yet been grouted, as well as the finished structure, be it that it is movable or be it that it is stationary.
  • the representation thus refers to the preassembled and not yet sprayed and jointed to the finished building movable state.
  • FIGS. 4 to 6 also relates to the inclusion of features previously described which also fit the exemplary embodiments described below.
  • Cylindrical cladding tubes 4 are concreted into the concrete of precast reinforced concrete parts 2.
  • prefabricated reinforced concrete parts 2 are joined via a joint 6 to form a building structure, the joints 6 in the finished building structure being connected to hardened filling compound (not shown).
  • the cladding tubes 4 serve to accommodate tendons, also not shown.
  • the space between the tendons and the cladding tubes is later sprayed with injection mortar.
  • the cladding tubes in the neighboring prefabricated reinforced concrete parts are essentially axially aligned with one another, apart from small lateral displacements in the joint area.
  • each prefabricated reinforced concrete part 2 is formed on the outside on a web 66 with a flat end face, which runs at right angles to the axis of the cladding tubes 4.
  • the webs 66 delimit a deeper recessed receiving space 68 for filling material, which is in the plane End of the web 66 passes over a bevel 70.
  • the flat end faces of all edge webs 66 lie in one plane.
  • the base 72 of the receiving space 68 runs parallel to this.
  • Conical recesses 12 extend from this, which merge into the respective prefabricated reinforced concrete part 2 into a weakened conical or cylindrical region 30, on the inner surface of which a sealing element 20 comes into contact.
  • the cladding tubes 4 end in the respective prefabricated reinforced concrete part 2 in an area 16 set back from the joint interface 10.
  • the cladding tubes 4 of the neighboring prefabricated reinforced concrete parts 2 are each bridged by bypass tubes 24 in the sense of FIG. 1 to form a continuous pressure-tight channel 8.
  • a bridging sleeve 32 is used instead for bridging, which in the sense of FIGS. 2 and 3 is telescopically displaceable on the cladding tube 4 located on the right in FIGS. 5a and 5b in the precast reinforced concrete part shown on the right.
  • connection area 18 to a cladding tube 4 it is accepted by somewhat more radial dimensioning of the bridging tube 24 or the bridging sleeve 32 that injection mortar injected into the cladding tubes penetrates outward from the actual area of the channel 8.
  • a seal against the joint 6 is carried out by means of the sealing elements 20, which seal directly or indirectly between the parts 4 and 24 or 32 forming the pressure-tight channel 8 on the one hand and the precast reinforced concrete part 2 on the other hand, permitting injection mortar in the aforementioned outer area of the channels 8 swells up to the sealing elements 20 and also fills these outer volumes.
  • the recess 12 with a somewhat smaller extension in the area is inside the prefabricated reinforced concrete part 2, on the casing tube 4 of which the bridging sleeve 4 is telescopically displaceable along one displacement space 36 the joint interface 10, dimensioned with somewhat greater steepness and a smaller axial length and merges in the region 30 into a sleeve 38 concreted in the reinforced concrete prefabricated part 2, which forms a sliding surface 40 for the associated sealing element 20, which is used as a piston for the telescopic displacement of the bridging sleeve 32 finds.
  • an injection channel 50 opening into the displacement space 36 in question is formed in the reinforced concrete precast element 2, through which cement mortar as a pressure medium for pushing out the bridging sleeve 32 can be injected into the end position shown in FIG. 5a.
  • the bridging pipe 24 according to FIG. 4 is dimensioned as a spacer between the adjacent reinforced concrete prefabricated parts 2 and, for this purpose, abuts the shoulders 28 of the areas 30 on the front, which is approximately in the same radial plane as the connecting areas 18 of the cladding tubes 4 to the bridging pipes 24, the bottom of the areas 30 form.
  • All sealing elements 20 are also designed as lip seals 54 with a shaft 56 facing the respective joint 6 and two lips 58 and 60, of which the first lip 58 in the case of FIG. 4 and the left-hand side of FIGS. 5a and 5b on the bridging tube 24 or the bridging sleeve 32 and the other second lip 60 on the concrete of the precast reinforced concrete part 2 within the area 30, in the case of the right-hand side of FIGS. 5a and 5b lip 58 on the outer tube 4 and lip 60 on the sliding surface 40 of the sleeve 38 , come to the sealing plant.
  • the first lip 58 each has a somewhat smaller axial extent than the second lip 60.
  • the radially somewhat recessed end part 74 provided at the bridging tube 24 according to FIG. 4, on which the first lip 58 comes to rest, is cut away at the bridging sleeve 32 at the front end, so that the bridging sleeve just barely transitions 76 in the end part 74 and the first lip 58 for sealing contact comes up to the cladding tube 4, on which the bridging sleeve 32 is telescopically displaceable.
  • lip seals 54 are designed as annular sleeves.
  • the lip seals 54 are axially supported on the end face of their shank 56 facing the adjacent joint 6 in each case on a circumferential projection 44 of the bridging tube 24 or the bridging sleeve 32, this projection 44 as a circumferential bead 62 with the wall structure like the other areas of the bridging tube or the bridging sleeve is designed.
  • a central projection 63 is also formed as a bead.
  • All three projections namely the front beads 62 supporting the lip seals 54 and the central projection 63, have such a radial width and such an axial extension that during the telescopic extension of the bridging sleeve 32 as a guide in the region 30 or on the sliding surface 40 can serve.
  • the middle projection 63 within the reinforced concrete prefabricated part 2 also serves as a guide, in which the bridging sleeve 32 on the cladding tube 4 is telescopic is displaceably mounted until the front bead at the free end of the telescopically extended bridging sleeve engages and holds in the region 30 of the opposite precast reinforced concrete part.
  • a sliding surface 30 formed directly in the concrete of the precast reinforced concrete element can also occur, as has already been mentioned.
  • FIG. 6 also deals with an additional sealing problem, which can occur in particular when using lip seals with respect to the bridging sleeve 32.
  • a support ring 64 which is pressed onto the outer circumference of the shaft 56, is expediently used to generate this prestress. 6 how the support ring 64 presses the material of the shaft radially in such a way that the more relaxed material of the shaft protrudes radially on both end faces of the support ring.
  • the support ring 64 is fitted onto the shaft 56 before the lip seal 54 is installed on the bridging sleeve 32. Since the inner diameter of the shaft of the lip seal is dimensioned smaller in the relaxed state than the outer diameter of the bridging sleeve and since the outer diameter of the shaft of the lip seal is inherently somewhat larger than the inner diameter of the support ring, the shaft 56 of the lip seal already fits during assembly between the outer diameter of the bridging sleeve 32 and the inner diameter of the support ring 64 with prestress. This pretension is sufficient to reliably seal the aforementioned creep of the injection mortar along the lateral surface 82.
  • the shaft 56 acts here as a compression seal.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Joints Allowing Movement (AREA)
  • Bridges Or Land Bridges (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Panels For Use In Building Construction (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)

Claims (26)

  1. Elément de construction construit à la manière de béton précontraint, à partir de plusieurs pièces préfabriquées (2) en béton armé assemblées qui peuvent être reliées au niveau de leurs jointures (6) avec une composition de remplissage durcissable, dans lequel les organes de précontrainte peuvent être introduits et précontraints dans des tubes enveloppe (4) qui sont noyés dans les pièces préfabriquées individuelles (2), les tubes enveloppe (4) étant reliés les uns aux autres à travers la région de la jointure (6) entre pièces préfabriquées voisines (2) pour former des canaux traversants (8) étanches à la pression pour les organes de précontrainte, et dans lequel au moins une liaison tubulaire est agencée à l'intérieur d'un évidement (12) au niveau de la surface de délimitation (10) de la jointure d'au moins une pièce préfabriquée (2), et cette liaison tubulaire est étanchée par rapport à l'évidement (12), ledit évidement (12) étant réalisé de manière conique à partir de la surface de délimitation (10) et se transformant à l'intérieur de la pièce préfabriquée (2) en une région rétrécie (30), dans laquelle débouche le tube enveloppe (4) de la pièce préfabriquée (2) pourvue de l'évidement (12), et qui reçoit un tube de transition (24; 32), mis en place dans la jointure (6), du canal étanche à la pression (8), et dans lequel l'espace intermédiaire entre les tubes enveloppe (4) et les organes de précontrainte peut être en particulier remplis avec du mortier d'injection,
    caractérisé en ce que la liaison tubulaire aux deux extrémités du tube de transition respectif (24; 32) est réalisée sous la forme d'une articulation élastique (20) à la manière de caoutchouc entre des tubes (4,4; 4, 14; 4, 24; 4, 32; 32, 38) situés les uns à la suite des autres qui forment les canaux traversants (8) étanches à la pression, et
    en ce que l'évidement conique (12) se transforme en direction de la région de raccordement (18) en une région à conicité affaiblie ou cylindrique (30), contre laquelle s'appuie extérieurement l'articulation élastique (20).
  2. Elément de construction selon la revendication 1, caractérisé en ce qu'un manchon de transition (32), servant de tube de transition, peut être enfilé de façon télescopique sur un tube enveloppe (4) qui se termine librement dans un espace de déplacement (36) dans la pièce préfabriquée (2), ou peut être enfilé dans ledit tube enveloppe, jusqu'environ en affleurement avec la surface de délimitation (10) de la jointure de la pièce préfabriquée (2) qui comporte le tube enveloppe (4).
  3. Elément de construction selon la revendication 2, caractérisé en ce qu'à l'extrémité libre (14) du manchon de transition (32), sa section intérieure est adaptée au tube enveloppe (4).
  4. Elément de construction selon l'une ou l'autre des revendications 2 et 3, caractérisé en ce que le manchon de transition (32) est pourvu d'un piston qui peut être sollicité par un milieu sous pression, de préférence du mortier de ciment, dans le but de déplacer le manchon de transition (32) en dépassement au-delà de la surface de délimitation (10) de la jointure.
  5. Elément de construction selon la revendication 4, caractérisé en ce qu'il comporte un guidage de coulissement extérieur (38,40) pour le piston (20).
  6. Elément de construction selon la revendication 5, caractérisé en ce que le guidage de coulissement est formé dans le béton de la pièce préfabriquée (2).
  7. Elément de construction selon l'une ou l'autre des revendications 5 et 6, caractérisé en ce que le guidage de coulissement (38, 40) comporte une pièce de guidage (38), par exemple une douille, noyée dans le béton de la pièce préfabriquée (2).
  8. Elément de construction selon l'une quelconque des revendications 3 à 7, caractérisé en ce que l'articulation élastique (20) est prévue sous la forme du piston.
  9. Elément de construction selon l'une quelconque des revendications 5 à 7 et la revendication 8, caractérisé en ce que l'articulation élastique (20) qui sert en tant que piston assure également une étanchéité vis-à-vis du guidage de coulissement (38, 40).
  10. Elément de construction selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'articulation élastique (20) a une section sensiblement en forme d'équerre, le bras (26) de l'équerre dirigé vers l'intérieur étant appliqué contre la face d'extrémité du tube de transition (24) ou du manchon de transition (32).
  11. Elément de construction la revendication 10, caractérisé en ce que l'articulation élastique (20) est retenue de manière imperdable contre un épaulement (48) dans le béton de la pièce préfabriquée (2).
  12. Elément de construction selon l'une quelconque des revendications 1 à 11, caractérisé en ce que l'articulation élastique (20) est appuyée à l'extérieur contre un bordage du tube enveloppe (4).
  13. Elément de construction selon l'une quelconque des revendications 1 à 12, caractérisé en ce que les pièces préfabriquées (2) se complètent pour former l'enveloppe d'un réservoir cylindrique.
  14. Elément de construction selon l'une quelconque des revendications 1 à 13, caractérisé en ce que les articulations élastiques (20) sont réalisées sous la forme de joints (54) à lèvres, qui comportent un corps (56) dirigé vers la jointure voisine (6), et sont en contact au moyen d'une première lèvre (58) contre le tube de transition (24, 32) et par une seconde lèvre (60) contre la pièce préfabriquée, directement ou par l'intermédiaire d'une pièce (38) qui lui est reliée.
  15. Elément de construction selon la revendication 14, caractérisé en ce que le corps (56) du joint à lèvres (54) est précomprimé radialement sur le manchon de transition (32).
  16. Elément de construction selon la revendication 15, caractérisé en ce qu'il comprend une bague d'appui (64) enfilée extérieurement sur le corps (56).
  17. Elément de construction selon l'une quelconque des revendications 14 à 16, caractérisé en ce que la pièce (38) reliée est la pièce de guidage pour le piston d'un manchon de transition (32) déplaçable de façon télescopique sur un tube enveloppe (4).
  18. Elément de construction selon l'une quelconque des revendications 1 à 17, caractérisé en ce que les tubes de transition (24) sont dimensionnés de manière à former des éléments d'écartement entre les pièces préfabriquées voisines (2) afin d'établir la largeur des jointures (6) entre ces dernières.
  19. Elément de construction selon l'une quelconque des revendications 1 à 18, caractérisé en ce que l'articulation élastique (20) est retenue axialement par une saillie (44) sur le tube enveloppe (4), ou sur un tube de transition (24) ou sur un manchon de transition (32).
  20. Elément de construction selon la revendication 19, caractérisé en ce que la saillie (44) est réalisée sous la forme d'une moulure (62) sur le tube (4, 24, 32).
  21. Elément de construction selon l'une ou l'autre des revendications 19 et 20, caractérisé en ce que la saillie (44) est formée sur un manchon de transition (32) qui peut être déplacé de façon télescopique, avec un dépassement radial tel et une longueur axiale telle qu'elle sert d'élément de guidage pour le manchon de transition (32) dans un guidage de coulissement (40) pour un piston du manchon de transition.
  22. Elément de construction selon la revendication 21, caractérisé en ce qu'il comprend une saillie centrale (63), réalisée également de préférence sous la forme d'une moulure, sur le manchon de transition (32), cette saillie étant prévue en tant qu'élément de guidage intermédiaire pour le manchon de transition (32) dans le guidage de coulissement (40) dans une condition d'enfilage seulement partiel du manchon de transition (32).
  23. Elément de construction selon quelconque des revendications 1 à 22, caractérisé en ce que des tubes de transition (24) sont agencés respectivement entre au moins deux moins deux pièces préfabriquées (2), et des manchons de transition (32) sont agencés respectivement entre au moins deux autres pièces préfabriquées.
  24. Elément de construction selon la revendication 23, caractérisé en ce que l'on utilise pour les tubes de transition (24) et pour les manchons de transition (32) des composants identiques, le cas échéant découpés.
  25. Elément de construction selon l'une quelconque des revendications 1 à 24, caractérisé en ce que l'élément élastique considéré (20) est préalablement monté sur l'un des tubes (4, 24, 32) de la liaison tubulaire considérée.
  26. Elément de construction selon l'une quelconque des revendications 1 à 25, caractérisé en ce que le tube de transition (24) porte à ses deux extrémités une articulation élastique (20) préalablement montée.
EP89111620A 1988-06-27 1989-06-26 Construction constituée par l'assemblage d'éléments préfabriqués en béton armé utilisant la technique du béton précontraint Expired - Lifetime EP0348870B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19883821626 DE3821626A1 (de) 1988-06-27 1988-06-27 Aus mehreren stahlbetonfertigteilen zusammengefuegter baukoerper in einer spannbetonbauweise
DE3821626 1988-06-27
DE3824107A DE3824107A1 (de) 1988-06-27 1988-07-15 Aus mehreren stahlbetonfertigteilen zusammengefuegter baukoerper in einer spannbetonbauweise
DE3824107 1988-07-15

Publications (2)

Publication Number Publication Date
EP0348870A1 EP0348870A1 (fr) 1990-01-03
EP0348870B1 true EP0348870B1 (fr) 1994-05-18

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EP89111620A Expired - Lifetime EP0348870B1 (fr) 1988-06-27 1989-06-26 Construction constituée par l'assemblage d'éléments préfabriqués en béton armé utilisant la technique du béton précontraint

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EP (1) EP0348870B1 (fr)
AT (1) ATE105899T1 (fr)
DE (2) DE3824107A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2775492B1 (fr) * 1998-02-27 2000-05-05 Freyssinet Int Stup Elements de construction prefabriques, ouvrage precontraint realise avec de tels elements et procede de fabrication de tels elements
DE29914673U1 (de) * 1999-08-21 1999-12-16 Dyckerhoff & Widmann AG, 81902 München Korrosionsgeschütztes freies Zugglied, vornehmlich externes Spannglied für Spannbeton
EP1861562B1 (fr) * 2005-03-23 2010-10-27 VSL International AG Dispositif pour un accouplement de gaines
EP1983125A3 (fr) * 2007-04-17 2015-09-02 A-Consult Holding Group A/S Dispositif d'étanchéité
EP3084097B8 (fr) 2013-12-20 2019-03-20 CCL Stressing International Limited Construction et procédé de fabrication d'une construction
US10260230B2 (en) * 2014-02-06 2019-04-16 Srg Ip Pty Ltd Connector for use in forming joint
EP3543418B1 (fr) * 2018-03-23 2021-05-12 Soletanche Freyssinet Procédé de raccordement de conduits de tendon de segments préfabriqués et structure résultante
CN109881573A (zh) * 2019-04-01 2019-06-14 西南交通大学 一种装配式空心板桥构造

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5379269A (en) * 1969-04-21 1970-10-29 John Laing And Son Limited Duct former
FR2067996A5 (fr) * 1969-11-25 1971-08-20 Dursapt Henri
FR2596439B1 (fr) * 1986-03-26 1988-07-08 Techniport Sa Dispositif de liaison pour gaine de beton precontraint

Also Published As

Publication number Publication date
EP0348870A1 (fr) 1990-01-03
ATE105899T1 (de) 1994-06-15
DE3824107A1 (de) 1990-03-15
DE58907675D1 (de) 1994-06-23

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