EP0675237A2 - Rinnenelement aus Stahlbeton und Abflussrinne - Google Patents

Rinnenelement aus Stahlbeton und Abflussrinne Download PDF

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Publication number
EP0675237A2
EP0675237A2 EP95109000A EP95109000A EP0675237A2 EP 0675237 A2 EP0675237 A2 EP 0675237A2 EP 95109000 A EP95109000 A EP 95109000A EP 95109000 A EP95109000 A EP 95109000A EP 0675237 A2 EP0675237 A2 EP 0675237A2
Authority
EP
European Patent Office
Prior art keywords
metal
channel
elements
channel element
grid
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.)
Granted
Application number
EP95109000A
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English (en)
French (fr)
Other versions
EP0675237B1 (de
EP0675237A3 (de
Inventor
Gérard Corberant
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.)
Prefaest SAS
Original Assignee
Prefaest SAS
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Filing date
Publication date
Application filed by Prefaest SAS filed Critical Prefaest SAS
Publication of EP0675237A2 publication Critical patent/EP0675237A2/de
Publication of EP0675237A3 publication Critical patent/EP0675237A3/de
Application granted granted Critical
Publication of EP0675237B1 publication Critical patent/EP0675237B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224—Surface drainage of streets
    • E01C11/227—Gutters; Channels ; Roof drainage discharge ducts set in sidewalks
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/04—Pipes or fittings specially adapted to sewers
    • E03F3/046—Open sewage channels

Definitions

  • the present invention relates to a reinforced concrete channel element comprising a bottom and two side walls rising from and on either side of said bottom, each of the upper ends of said side walls comprising a metal protection and / or housing profile. for a cover grid, the reinforcement of the reinforced concrete comprising metal reinforcement elements fixed to said metal profiles.
  • the invention also relates to a channel consisting of these channel elements.
  • the document FR-A-2.634.234 describes a channel element as mentioned above where the metal frame, embedded in the concrete of the channel element consists of a plurality of arches distributed along the length of the channel, and each arranged in a transverse plane of the latter, the ends of these arches being fixed to the metal reinforcements protecting the upper part of the two side walls.
  • This channel element together with a plurality of other identical elements, can be aligned longitudinally to form a channel.
  • Document FR-A-2,649,423 describes a channel element as mentioned above, where the aligned arches are arranged in the transverse plane of the channel element and where the ends of each arch are fixed respectively in two sleeves s 'extending perpendicularly to said reinforcements or metal profiles, the upper part of each sleeve being designed to receive a screw for fixing the grid plate.
  • the present invention aims to provide a channel element having improved load resistance.
  • the gutter according to the present invention is characterized in that the reinforcement of the reinforced concrete comprises a first type of metal reinforcement elements which are fixed to said metal profiles by means of sockets intended to receive a screw for fixing the grid. , and a second and third type of metal reinforcement elements welded to external and internal parts of the metal profiles respectively.
  • the triple fixing of the metal profit on the internal frame of the channel element guarantees a perfect seat and support between the metal profile and the concrete upper end of the vertical walls so as to guarantee as much as possible the maintenance of the whole. between the grid plate and the vertical walls.
  • the first, second and third types of metal reinforcement elements can be generally U-shaped arches, which are embedded in the concrete of the gutter which has a corresponding U-shaped section, the free ends of each arch being fixed to the profiles. metallic.
  • the grid fixing screw receiving sleeves are arranged below a horizontal part of the metal profiles which carries the grid and in that they are closed at their lower part by a solid lug welded against the first type d '' metal reinforcement elements.
  • the lug as a welding support rather than the socket itself since thermal deformations of the socket could occur during welding, thus compromising the complete engagement of the screws to the bottom of the socket in order securely tighten the grid plate against the horizontal part of the profile.
  • the metal profiles have flaps each having partially cut and folded parts intended to serve as a support for making a mechanical connection by welding between the metal profiles and the second and third types of metal reinforcement elements.
  • FIG. 1a there is a channel element 1 having a bottom 17 and two side and vertical walls 3 and 4 which extend on either side of the bottom 17 upwards.
  • These vertical walls 3 and 4 are each covered with a metal profile 9, 9 ′ whose main faces form a shoulder which is intended to receive the longitudinal edges of a grid plate 2 so that the upper surface of said grid plate 2 is located at the highest parts 9a of the sections 9 and 9 '.
  • the grid plate 2 comprises along these lateral edges a certain number of notches 14 which are provided with holes 15 allowing the passage of the screws 13.
  • the metal profiles 9 and 9 ' have below the surface 9c and at the holes 10, threaded bushings inside, thus allowing to fix the grid plate 2 on the metal sections 9 and 9 'by tightening the screws 13 in said sockets.
  • the number of screws 13 and holes 10 in the longitudinal direction of the channel will be determined so as to obtain the desired solidity of the channel.
  • the grid plate 2 further comprises a plurality of slots 12 which extend essentially perpendicular to the longitudinal direction of said plate 2, slots which may have, as shown in Figures 1a and 1b, a shape curved so that that the curvature remains in the plane of the upper surface of the plate 2.
  • Each group of two slots 12 is separated by a bar 19 and this bar can carry elements on its upper surface deflectors 16 which constitute slight projections and which may have extensions in the longitudinal direction of the grid plate 2 so that they cover essentially the entire width of the bars 19.
  • the purpose of the curved shape of the slots 12 is to increase the probability that the water wires which pass through the said grid plate - which will be, after the final installation of the channel element 18, at the level of the floor - falling into the slots 12 instead of crossing the grid plate 2 at the bars 19.
  • said bars 19 include the projections 16 to direct a water stream which would engage to pass the plate on the back of said bars 19 to be deflected left or right to surely fall into one of the slots 12.
  • the channel element 1 has a front and rear surface essentially corresponding to sections perpendicular to the longitudinal direction of the channel element, and these sections include profiled formations 6 and 11, so as to constitute an interlocking element during the longitudinal assembly of several channel elements as illustrated in Figures 1a and 1b.
  • the front and rear faces which have just been described have axial holes 7 and 7 'of limited axial extension, holes which allow the insertion of the studs 7a and 7a' so as to obtain an exact alignment of the front surface 5 of an element with the rear surface of another neighboring element after the insertion of the pins 7a and 7a 'in the four holes, two and two of which are each aligned longitudinally.
  • openings 8 and 8 ' which delimit reservations longitudinal which completely cross the channel elements in the longitudinal direction and it is easily understood that a channel which is constituted by a number of channel elements as illustrated in FIGS. 1a and 1b comprises, after alignment, two reservations, which extend over the entire length of the gutter.
  • Figure 1b shows a channel element 18 identical to that of Figure 1a but in the closed state, that is to say, the grid plate 2 has been fixed on the upper ends of the walls 3 and 4 which are covered with metal profiles 9 and 9 ', by tightening the screws 13 as mentioned above.
  • the heads of the screws 13 are then located in the notches 14 so that the channel element has no protrusion on its upper surface which essentially exceeds the level of the upper surface of the grid plate 2 or the upper shoulders of the metal profiles 9 and 9 '.
  • the deflectors 16, them slightly exceed this surface as described above, this however being a desired effect for the reasons mentioned above.
  • FIG. 2 shows a step of assembling several channel elements 1a to 1e longitudinally one behind the other, in order to form a channel.
  • the set of channel elements has aligned longitudinal reservations starting from the openings 8 and 8 ′ of the first channel element 1a, the alignment of these reservations being obtained by the profiled parts of the front and rear faces of the channel elements as well as by the studs 7a and 7a '.
  • Each channel element 1a to 1e comprises a clamping means of the truck door latch type comprising near the end of an element a stop or hook means 20c ', and on the other end of the element channel, a closing loop 20d so as to tighten the two channel elements one against the other after engagement of the loop 20c in the hook 20c 'followed by the pivoting of the loop 20c in the opposite direction to the hook 20c'.
  • clamping means can be used as the only means for permanently maintaining the alignment of the set of channel elements in situations where the required force of mutual stress between the channel elements is not very high.
  • nuts 60, 60 ′ are passed over the two strands of rods 21 and 21 ′ emerging from the front face of the first channel element as well as identical nuts 60 a over the strands of the rods 21, 21 ′ which exit from the rear surface of the last channel element and a longitudinal stress force is applied by tightening the nuts 60, 60a in the opposite direction against the front and rear surfaces of the first and last channel element respectively.
  • biasing means only the rods 21 and 21 'with their nuts 60 without applying the latches 20a, 20b etc. which enable only to maintain a pre-alignment to facilitate the introduction of the rods 21 and 21 'in the longitudinal bores, locks which do not however constitute an essential element in an embodiment where clamping by the rods 21 and 21' is used .
  • locks 20a, 20b etc. can be envisaged alone and without the additional support of the metal rods 21 and 21 ′ where the stressing force by said latches is sufficient for the type of channel which it is desired to manufacture.
  • FIG. 3 shows a perspective of the metallic profit which rests on the upper end of the vertical and lateral walls of the channel element 1, and this metallic profile 9 has two horizontal surfaces, an upper surface 36 and a lower surface 37 which are separated by a shoulder 38, the surface 37 and the shoulder 38 being intended to come into contact with the lateral edges of the grid plate 2 as illustrated for example in FIG. 4.
  • Flaps 30 and 31 extend downwards from the opposite ends of the horizontal parts 36 and 37 in order to protect the upper end parts of the interior and exterior surfaces of the vertical walls as is clearly visible in FIG. 4.
  • the horizontal part 37 has a plurality of sockets 34 below, only one of which is shown in FIG. 3.
  • the sleeve 34 which extends downwards from a hole 10 (FIG. 1a) is threaded inside and it is closed at its lower part by a solid lug 35 which will serve as a welding support to make them integral the socket 34 (together with the screws 13 - Figure 1 - it will receive) with a metal frame member 42 ( Figure 4).
  • a plurality of sockets 34 is arranged below the holes 10 to serve as a receptacle for the screws 13 which are distributed over the length of the grid plate 2.
  • the flaps 30 and 31 also have distributed over the longitudinal extension of the profile 9, a number of parts 32 and 33 partially cut and folded towards the inside of the profile 9, parts 32 and 33 which will serve as indicated in the part left of Figure 4, support for making a mechanical connection by welding between the profile 9 and the rebar 40 and 41 which pass through the channel element 1 in the form of a hoop similar to the bar 42 which is found welded on lug 35.
  • Figure 4 the right part shows a cross section at the level of the screws 13, while the left part shows a section at the cut parts 32 and 33 of the flaps 30, 31 of the profile 9, clearly indicates that the channel element has a metallic encirclement consisting of the bar 42, the lug 35, the sockets 34, screws 13 and the plate 2 at the same intervals as the screws 13 are found in the grid plates, while it includes a second and third partial encirclement formed by the bars 40 and 41 which are welded to the outer and inner parts respectively of the metal profile.
  • anchoring elements by punching a part 32a which represents a rectangle cut along three of its four sides, and folded inwards. Element 32a is located completely inside the flaps 30 and 31 and has no intersection with the free edge 32b of this flap.
  • the welding of the metal profile 9 on the bars 40 and 41 is independent of the placement in the longitudinal direction of the screws 13, and the number of bars 40, 41 which are distributed over a certain length of the channel element is independent of the number d 'encirclements according to the position of the screws 13.
  • This triple fixing of the metal profile 9, 9' on the internal reinforcement of the channel element 1 guarantees a perfect seat and support between the metal profile and the upper concrete end of the vertical walls 3 and 4 so as to guarantee as much as possible the integrity of the whole between the grid plate 2 and the vertical walls 3 and 4.
  • FIG. 5a shows an exemplary embodiment of the lock situated between two neighboring channel elements as has already been mentioned in the description of FIG. 2, this lock comprising on the end side of a first channel element 1b , a hook 50 and, fixed on the opposite end of a neighboring channel element, a loop 52 which is pivotally fixed on this neighboring channel element 1a by means of two rings 54.
  • the loop 52 can be pivoted around its part which is held by the rings 54, and the two longitudinal branches of the loop 52 have holes 53 allowing the passage of a second loop 51 which also engages in the hooks 50.
  • Figure 5b shows another embodiment of the clamping means.
  • Two angles 77 are fixed in opposite directions on the lateral ends of two channel elements 1a and 1b so as to be able to cooperate by screwing a bolt 57 which will pass through the holes 59 made in the two perpendicular parts 56 of the angles.
  • the parts 55 are preferably welded to internal reinforcement elements of the channel elements 1a and 1b by means of the parts which penetrate into the concrete.
  • the clamping means according to Figures 5a and 5b can be used to maintain the channel elements in their mutual position, but also and above all, they can be used to obtain a perfect approximation of two elements after their rough installation.
  • FIG. 6 shows the interface between two opposing ends of the two neighboring channel elements 1a and 1b which are held in their relative position by a closed latch as described in more detail with reference to FIG. 5, after having aligned them previously by fitting their profiled parts 6 and 11.
  • the grid plates 2a and 2b have been designated without detail of their slit and bar structures, the longitudinal lateral edges of these plates represent, on the lower horizontal parts, metal profiles 9a, 9b and 9a ', 9b '.
  • Metal rods (cables) 21, 21 ' have been passed through the longitudinal reservations described in more detail with reference to the preceding figures, and nuts 60, 60', 60a are designated before their engagement on the rods 21, 21 ' .
  • the channel elements 1a and 1b have on their inner surface a waterproof coating 61 which covers all of the interior surfaces of the bottom and of the vertical walls of said channel element, this waterproof covering 61 further extending, on each side 62, between the upper part of the vertical wall and between the metal profile 9a, 9a 'so as to come out at 63 towards the outside below the flaps side 31 as illustrated in FIG. 3.
  • the coating 61 adheres perfectly against the interior surfaces of the concrete parts 64 which constitute the bottom and the vertical walls of the channel element and makes this channel element waterproof.
  • Such an arrangement of a waterproof coating and optionally resistant to corrosion can be provided for special applications of a channel which should conduct liquids which could have a detrimental effect on concrete.
  • Such welding is obviously done before the gutter is closed by all of the grid plates 2a, 2b, etc., welding which can be preceded by the deposition of a metal wire in the slot which is created between the two coatings 61 of the neighboring channel elements, metal wire which can later be used for checking the quality of the welding by seeking an electrical breakdown between this wire and a control probe which is passed manually along said weld.
  • the portions 63 of the waterproof coating leaving laterally from the vertical walls of the channel element 1a or 1b, can be used to make a waterproof connection with another waterproof coating or a waterproof layer which will be or which has been previously deposited on or in the ground neighbor in order to obtain a complete seal of the ground surface in a certain place.
  • An axial constraint between the various channel elements is particularly advantageous for elements carrying sealed layers sealed between the elements, to ensure their relative immobility.
  • FIGS 7a, 7b and 7c show several stages in the formation of the waterproof coating 61 of Figure 6, and it is understood that this coating 61 is constituted by a semi-rigid structure of a polymeric or other material that is found on the market in sheet or plate form.
  • FIG. 7a shows the two parts 70 and 71 of a pressing mold between which there is the original sheet 72, a mold which has a positive and a negative of the internal shape of a channel element and the shape 73, 74 of the metal profile mentioned above.
  • the mold part 71 has a shoulder 76 and the mold part 70 a shoulder 75 serving as a pair of scissors for cutting the edges of the sheet 72 when the mold is completely closed, as illustrated in FIG. 7b where the lateral strands 72a are distinguished. constituting the cut side edges of the sheet 72 '.
  • the two parts of the mold 71 and 70 are heated by integrated heating means not shown, as is known in the art of thermoforming.
  • the waterproof coating in the form of a semi-rigid molding is then obtained, which can be used as it is for the manufacture of a channel element according to FIG. 6.
  • the production of such a channel element can be carried out by first depositing the metal sections 9a, 9a 'at the bottom of a concrete casting mold, after which the sealing sheet 72' of FIG. 7c is laid. in the mold of so as to engage its corresponding parts in the metal profiles. As illustrated in FIG. 3, the interior surfaces of these metal sections have parts 32, 33, 34 and 35 which must pass through the waterproof sheet 72 ′ in order to be connected by welding to a metal frame which will also be deposited in the mold, and after having pierced these parts 32 to 35 through the waterproof sheet 72 ′, the various welding steps which have been described in connection with FIG. 4 above are carried out and the mold is then filled with concrete.
  • Demolding produces a channel element 1 as illustrated in FIG. 1a, channel element which will be closed by a grid plate 2 at the desired time.
  • the metal profiles 9 can be made of steel, possibly galvanized and the grid plates 2 are advantageously made of cast iron.
  • a coating of the metal sections 9 as well as of the grid plate 2 in PVDF or other could be envisaged in order to give the gutter an exposed surface upwards which is smoother and whose microstructure allows an easy cleaning possibly by the application of a simple water jet.
  • a coating of PVDF or other may be provided in any color which will be related to the interior of the building in which the gutter was manufactured.
  • a length of galvanized steel profile according to Figure 3 is first treated with acid to obtain a racking. Then the profile is rinsed twice with tap water and a third time with demineralized water, and dried and degassed at 200-210 ° C.
  • An anti-corrosion treatment will follow the drying and then the profile is passed through a cabin for applying polymerizable powder or capable of forming a waterproof coating at the temperature of the profile, which will be for example for a polyester powder between 210 and 220 °. vs. A new drying / degassing treatment at 200-210 ° C will end the process.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sewage (AREA)
  • Building Environments (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Paper (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Moulding By Coating Moulds (AREA)
  • Road Paving Structures (AREA)
  • External Artificial Organs (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Saccharide Compounds (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
EP95109000A 1994-02-16 1995-02-03 Rinnenelement aus Stahlbeton und Abflussrinne Expired - Lifetime EP0675237B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9401758A FR2716217B1 (fr) 1994-02-16 1994-02-16 Caniveau et élément de caniveau immobilisable.
FR9401758 1994-02-16
EP95101467A EP0668408B1 (de) 1994-02-16 1995-02-03 Rinne und feststellbares Rinnenelement

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP95101467A Division EP0668408B1 (de) 1994-02-16 1995-02-03 Rinne und feststellbares Rinnenelement
EP95101467.9 Division 1995-02-03

Publications (3)

Publication Number Publication Date
EP0675237A2 true EP0675237A2 (de) 1995-10-04
EP0675237A3 EP0675237A3 (de) 1997-01-02
EP0675237B1 EP0675237B1 (de) 2000-05-17

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EP95109000A Expired - Lifetime EP0675237B1 (de) 1994-02-16 1995-02-03 Rinnenelement aus Stahlbeton und Abflussrinne
EP95101467A Expired - Lifetime EP0668408B1 (de) 1994-02-16 1995-02-03 Rinne und feststellbares Rinnenelement

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EP95101467A Expired - Lifetime EP0668408B1 (de) 1994-02-16 1995-02-03 Rinne und feststellbares Rinnenelement

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EP (2) EP0675237B1 (de)
AT (2) ATE187993T1 (de)
DE (2) DE69516929D1 (de)
FR (1) FR2716217B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2292291A1 (es) * 2005-03-31 2008-03-01 Uralita Sistemas De Tuberias, S.A. Canaleta con rejilla.
CN107869101A (zh) * 2017-10-27 2018-04-03 广州番禺职业技术学院 一种预制装配式公路截水沟及其制造方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1294947B1 (it) * 1997-09-19 1999-04-23 Compasso S R L Griglia di percolazione per liquidi in genere, e relativo supporto
FR2953865B1 (fr) * 2009-12-16 2012-03-23 F2F Sas Element de caniveau ouvert prefabrique
CN112359673B (zh) * 2020-12-21 2022-02-22 南通市五洲复合材料有限公司 一种快速拼接式玻璃钢格栅板

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2634234A1 (fr) 1988-07-13 1990-01-19 Prefaest Element de caniveau en beton arme, et moule correspondant de prefabrication
FR2649423A2 (fr) 1988-07-13 1991-01-11 Prefaest Sa Element de caniveau en beton arme

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FR871588A (fr) * 1940-12-20 1942-04-30 Système de canalisation
DE2423305A1 (de) * 1974-05-14 1975-11-27 Doerken & Schulte Kg Rinnenabdeckrost
JPS54128132A (en) * 1978-03-29 1979-10-04 Norihiro Umezawa Joint structure of waterway
DE3036837A1 (de) * 1980-09-30 1982-05-06 Thyssen Plastik Anger KG, 8000 München Rohr bzw. gerinne
DE3515917A1 (de) * 1985-05-03 1986-11-06 Passavant-Werke AG & Co KG, 6209 Aarbergen Entwaesserungsrinne
DE3516654A1 (de) * 1985-05-09 1986-11-13 Passavant-Werke AG & Co KG, 6209 Aarbergen Strassenentwaesserungsrinne
DE8809408U1 (de) * 1988-07-23 1988-09-15 Birco Baustoffwerk GmbH, 7570 Baden-Baden Abflußrinnenelement für Entwässerungsanlagen
DE3827041A1 (de) * 1988-08-10 1990-02-15 Passavant Werke Entwaesserungsrinne
DE8903266U1 (de) * 1989-03-16 1989-05-03 Broermann, geb. Muckermann, Rita, 4783 Anröchte Entwässerungsrinne, deren Längsränder Kantenschutzprofile aufweisen
DE8911111U1 (de) * 1989-09-16 1989-11-23 Passavant-Werke AG, 6209 Aarbergen Bodenentwässerungsrinne
DE9108999U1 (de) * 1991-07-22 1991-09-12 Birco Baustoffwerk GmbH, 7570 Baden-Baden Rechteckförmiges Bauelement aus Beton mit einer rinnenförmigen Aussparung zur Erstellung eines abgedichteten Rinnensystems
US5213438A (en) * 1991-12-06 1993-05-25 Aco Polymer Products, Inc. Chemical safety trench drain conduit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2634234A1 (fr) 1988-07-13 1990-01-19 Prefaest Element de caniveau en beton arme, et moule correspondant de prefabrication
FR2649423A2 (fr) 1988-07-13 1991-01-11 Prefaest Sa Element de caniveau en beton arme

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2292291A1 (es) * 2005-03-31 2008-03-01 Uralita Sistemas De Tuberias, S.A. Canaleta con rejilla.
ES2292291B2 (es) * 2005-03-31 2008-10-01 Uralita Sistemas De Tuberias, S.A. Canaleta con rejilla.
CN107869101A (zh) * 2017-10-27 2018-04-03 广州番禺职业技术学院 一种预制装配式公路截水沟及其制造方法

Also Published As

Publication number Publication date
EP0675237B1 (de) 2000-05-17
FR2716217A1 (fr) 1995-08-18
FR2716217B1 (fr) 1996-05-03
DE69514014D1 (de) 2000-01-27
EP0668408B1 (de) 1999-12-22
EP0675237A3 (de) 1997-01-02
ATE187993T1 (de) 2000-01-15
DE69516929D1 (de) 2000-06-21
EP0668408A1 (de) 1995-08-23
ATE193075T1 (de) 2000-06-15

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