EP0673734A1 - Pre-cast concrete element and method of making same - Google Patents

Pre-cast concrete element and method of making same Download PDF

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Publication number
EP0673734A1
EP0673734A1 EP95301933A EP95301933A EP0673734A1 EP 0673734 A1 EP0673734 A1 EP 0673734A1 EP 95301933 A EP95301933 A EP 95301933A EP 95301933 A EP95301933 A EP 95301933A EP 0673734 A1 EP0673734 A1 EP 0673734A1
Authority
EP
European Patent Office
Prior art keywords
mould
concrete
sealing
sealing element
concrete element
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Withdrawn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
EP95301933A
Other languages
German (de)
French (fr)
Inventor
Terrence Raymond Winterton
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.)
CV Buchan Ltd
Original Assignee
CV Buchan Ltd
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 CV Buchan Ltd filed Critical CV Buchan Ltd
Publication of EP0673734A1 publication Critical patent/EP0673734A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts
    • B28B21/563—Gaskets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/0043—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects with gaskets or sealing elements, e.g. for tunnelings or man holes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • E21D11/385—Sealing means positioned between adjacent lining members
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • E21D11/385—Sealing means positioned between adjacent lining members
    • E21D11/388—Sealing means positioned between adjacent lining members having longitudinal cavities communicating with the exterior on the outer side of the lining elements

Definitions

  • This invention relates to a pre-cast concrete element and more particularly to an arcuate pre-cast concrete tunnel or shaft lining segment incorporating a sealing member to prevent ingress of moisture between abutting faces of the tunnel or shaft lining segments.
  • EP-A 0 375 427 discloses a tunnel lining segment with rubber sealing members, the sealing members having been seated and adhesively bonded in pre-cast grooves provided in the segments.
  • a pre-cast concrete element having a sealing element protruding from a face thereof, characterised in that the sealing element having been incorporated in the concrete element at the time of casting.
  • a mould for making a pre-cast concrete element the mould being characterised by means releasably to entrap a sealing element to be cast in the concrete element so as to protrude from a face thereof.
  • a method of making a pre-cast concrete element having a sealing element protruding from a face thereof including the steps of providing a mould for the element to be cast therein, pouring concrete into the mould and subsequently releasing the concrete element so formed, characterised in that the sealing element is releasably entrapped so as to protrude from an inner wall of the mould prior to the pouring of the concrete into the mould such that, when the concrete element is subsequently released, part of the sealing element protrudes from a face of the concrete element.
  • the concrete element can be in the form of an arcuate tunnel or shaft lining segment.
  • the sealing element can be a sealing strip and can be formed from a water swellable rubber, such as hydrophillic rubber, or a resilient elastomeric material such as rubber, neoprene or E.P.D.M.
  • the sealing element is provided with a profile which causes the sealing element to be firmly anchored in the concrete element.
  • the sealing element can be provided with opposed grooves into which respective parts of the mould can form a tight fit.
  • a member in the form of a sealing strip 1 is shown protruding from all four edges of a concrete member in the form of a pre-cast concrete tunnel lining segment 2, the sealing strip 1 having been incorporated in the concrete segment 2 at the time of casting.
  • Figure 2 shows the sealing strip 1 cast into the edge of the segment 2, the sealing strip 1 being retained in the segment by one or more continuous or interrupted anchors 3. If each anchor 3 has a continuous profile, then it will also form a continuous water bar between the segment 2 and the sealing strip 1. The water bar reduces the chance of moisture passing between the seal and the concrete due to imperfections in the concrete or the sealing strip 1.
  • the sealing strip 1 has outwardly facing grooves or notches 4 mid-way across its profile. These grooves 4 are provided in the sides of the sealing strip in order to fix it to the mould during casting.
  • FIG 3 shows a typical mould 9 having grooves 7 and 8 in the head of the mould to receive the sealing strip 1, which is in this case continuous (the sealing strip 1 in Figure 3 is only shown diagrammatically).
  • the mould 9 also includes side shutters 10 and a detachable mould part 11 on the head of the mould to allow for segment demoulding after it has been formed.
  • Figure 4 shows in more detail the sealing strip 1 with its grooves 4 and anchor 3 inserted in the groove 8 in one of the side shutters 10.
  • the grooves 4 on the sealing strip 1 are held captive by facing protruding parts formed by a constriction or lips 12 in the groove 8. It will be appreciated that the lips 12 can be located at any suitable position within the groove 7, 8 provided that there is a section of the sealing strip 1 which interlocks with the groove 7, 8. Because the sides such as 10 are detachable, the only consideration for demoulding is that the sealing strips 1 should be resilient.
  • Figure 5 shows the sealing strip 1 inserted in the grooves 7 in the head of the mould 9.
  • the notches or grooves 4 on the sealing strip 1 are held captive by the lips 12 in the groove 7.
  • the lips 12 or other constriction in the grooves 7 can be at any position in the groove, the interaction between grooves 4 and lips 12 holding the sealing strip captive whilst forming a seal to prevent flow of concrete during casting beyond the grooves 4 in the direction away from the anchor 3, viz. into the void at the base of the groove 7, 8.
  • the sealing strip 1 is cast in and is fully anchored to the segment 2 whilst being accurately held in position in the mould 9 prior to casting.
  • the need to form grooves in the segments during casting is avoided, as well as the associated difficulties with providing a good quality and well-shaped groove free from imperfections. Also avoided is the need to fit and glue the sealing strip to the segment and the possibility of the sealing strip being dislodged is also reduced.
  • the protrusion and positioning of the sealing strip on the segment can be accurately controlled by the location of the grooves or notches 4 in the sealing strip and this increases pressure/gap performance of the seal.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Architecture (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

A pre-cast concrete element (2) has a sealing element (1) protruding from a face thereof, the sealing element having been incorporated in the concrete element at the time of casting. To facilitate this, a mould (9) includes means releasably to entrap the sealing element (1) to be cast in the concrete element so that the sealing element protrudes from a face of the concrete element. Manufacture of such concrete elements with sealing members is thereby facilitated.

Description

  • This invention relates to a pre-cast concrete element and more particularly to an arcuate pre-cast concrete tunnel or shaft lining segment incorporating a sealing member to prevent ingress of moisture between abutting faces of the tunnel or shaft lining segments.
  • In locations where tunnel or shaft linings are erected in water-bearing ground and where it is necessary to seal the lining to prevent the ingress of moisture, such linings can be sealed by inserting resilient sealing strips between abutting faces of the tunnel or shaft lining. Water swellable rubbers have also been used.
  • As an example of known practice, EP-A 0 375 427 discloses a tunnel lining segment with rubber sealing members, the sealing members having been seated and adhesively bonded in pre-cast grooves provided in the segments.
  • According to one aspect of the present invention, there is provided a pre-cast concrete element having a sealing element protruding from a face thereof, characterised in that the sealing element having been incorporated in the concrete element at the time of casting.
  • According to a second aspect of the present invention, there is provided a mould for making a pre-cast concrete element, the mould being characterised by means releasably to entrap a sealing element to be cast in the concrete element so as to protrude from a face thereof.
  • According to a third aspect of the present invention, there is provided a method of making a pre-cast concrete element having a sealing element protruding from a face thereof, including the steps of providing a mould for the element to be cast therein, pouring concrete into the mould and subsequently releasing the concrete element so formed, characterised in that the sealing element is releasably entrapped so as to protrude from an inner wall of the mould prior to the pouring of the concrete into the mould such that, when the concrete element is subsequently released, part of the sealing element protrudes from a face of the concrete element.
  • The concrete element can be in the form of an arcuate tunnel or shaft lining segment.
  • The sealing element can be a sealing strip and can be formed from a water swellable rubber, such as hydrophillic rubber, or a resilient elastomeric material such as rubber, neoprene or E.P.D.M.
  • Preferably, the sealing element is provided with a profile which causes the sealing element to be firmly anchored in the concrete element.
  • To enable to the sealing element to be entrapped by the mould, the sealing element can be provided with opposed grooves into which respective parts of the mould can form a tight fit.
  • For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:-
    • Figure 1 is a diagrammatic view of a concrete tunnel lining segment incorporating a cast-in sealing strip on its edge faces,
    • Figure 2 is a detailed view of the sealing strip cast into the segment,
    • Figure 3 is a diagrammatic exploded view of a segment mould incorporating the sealing strip,
    • Figure 4 is a detailed view of the sealing strip fixed in position in a side of the mould, and
    • Figure 5 is a detailed view of the sealing strip fixed in position in the head of the mould.
  • Referring to Figure 1 a member in the form of a sealing strip 1 is shown protruding from all four edges of a concrete member in the form of a pre-cast concrete tunnel lining segment 2, the sealing strip 1 having been incorporated in the concrete segment 2 at the time of casting.
  • Figure 2 shows the sealing strip 1 cast into the edge of the segment 2, the sealing strip 1 being retained in the segment by one or more continuous or interrupted anchors 3. If each anchor 3 has a continuous profile, then it will also form a continuous water bar between the segment 2 and the sealing strip 1. The water bar reduces the chance of moisture passing between the seal and the concrete due to imperfections in the concrete or the sealing strip 1.
  • It will be noted that the sealing strip 1 has outwardly facing grooves or notches 4 mid-way across its profile. These grooves 4 are provided in the sides of the sealing strip in order to fix it to the mould during casting.
  • Figure 3 shows a typical mould 9 having grooves 7 and 8 in the head of the mould to receive the sealing strip 1, which is in this case continuous (the sealing strip 1 in Figure 3 is only shown diagrammatically). The mould 9 also includes side shutters 10 and a detachable mould part 11 on the head of the mould to allow for segment demoulding after it has been formed.
  • Figure 4 shows in more detail the sealing strip 1 with its grooves 4 and anchor 3 inserted in the groove 8 in one of the side shutters 10. The grooves 4 on the sealing strip 1 are held captive by facing protruding parts formed by a constriction or lips 12 in the groove 8. It will be appreciated that the lips 12 can be located at any suitable position within the groove 7, 8 provided that there is a section of the sealing strip 1 which interlocks with the groove 7, 8. Because the sides such as 10 are detachable, the only consideration for demoulding is that the sealing strips 1 should be resilient.
  • Figure 5 shows the sealing strip 1 inserted in the grooves 7 in the head of the mould 9. The notches or grooves 4 on the sealing strip 1 are held captive by the lips 12 in the groove 7. Again, the lips 12 or other constriction in the grooves 7 can be at any position in the groove, the interaction between grooves 4 and lips 12 holding the sealing strip captive whilst forming a seal to prevent flow of concrete during casting beyond the grooves 4 in the direction away from the anchor 3, viz. into the void at the base of the groove 7, 8.
  • In order to allow vertical demoulding of the segment, it is necessary to have the detachable sections 11 on the head of the mould 9 to allow the sealing strip(s) 1 to disengage from the mould.
  • It will be appreciated that the sealing strip 1 is cast in and is fully anchored to the segment 2 whilst being accurately held in position in the mould 9 prior to casting. Thus, the need to form grooves in the segments during casting is avoided, as well as the associated difficulties with providing a good quality and well-shaped groove free from imperfections. Also avoided is the need to fit and glue the sealing strip to the segment and the possibility of the sealing strip being dislodged is also reduced.
  • The protrusion and positioning of the sealing strip on the segment can be accurately controlled by the location of the grooves or notches 4 in the sealing strip and this increases pressure/gap performance of the seal.
  • Because of the continuous anchorage of the sealing strip in the segment, this provides a much improved seal between the concrete and the sealing strip to give a better seal when in use in a tunnel or shaft.

Claims (8)

  1. A pre-cast concrete element (2) having a sealing element (1) protruding from a face thereof, characterised by the sealing element (1) having been incorporated in the concrete element (2) at the time of casting.
  2. A mould (9) for making a pre-cast concrete element (2), the mould being characterised by means (7, 8, 12) releasably to entrap a sealing element (1) to be cast in the concrete element (2) so as to protrude from a face thereof.
  3. A method of making a pre-cast concrete element (2) having a sealing element (1) protruding from a face thereof, including the steps of providing a mould (9) for the element (2) to be cast therein, pouring concrete into the mould (9) and subsequently releasing the concrete element (2) so formed, characterised in that the sealing element (1) is releasably entrapped so as to protrude from an inner wall of the mould prior to the pouring of the concrete into the mould such that, when the concrete element (2) is subsequently released, part of the sealing element (1) protrudes from a face of the concrete element (2).
  4. A pre-cast concrete element, or mould or method according to claim 1, 2 or 3, respectively, wherein the concrete element (2) is in the form of an arcuate tunnel or shaft lining segment.
  5. A concrete element, mould or method according to claim 1, 2, 3 or 4, wherein the sealing element (1) is a sealing strip formed from a water swellable rubber.
  6. A concrete element, mould or method according to claim 1, 2, 3 or 4, wherein the sealing element (1) is a sealing strip formed from a water swellable rubber or a resilient elastomeric material.
  7. A concrete element, mould or method according to any one of the preceding claims, wherein the sealing element (1) is provided with a profile which causes the sealing element to be firmly anchored in the concrete element (2).
  8. A mould according to claim 2 or method according to claim 3 or a method or mould according to claim 4, 5 or 6 as appendant to claim 2 or 3, wherein the sealing element (1) is provided with opposed grooves (4) into which respective parts of the mould (9) can form a tight fit to enable the sealing element to be entrapped by the mould.
EP95301933A 1994-03-24 1995-03-23 Pre-cast concrete element and method of making same Withdrawn EP0673734A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9405900 1994-03-24
GB9405900A GB2287732A (en) 1994-03-24 1994-03-24 Pre-cast concrete element and method of making same

Publications (1)

Publication Number Publication Date
EP0673734A1 true EP0673734A1 (en) 1995-09-27

Family

ID=10752469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95301933A Withdrawn EP0673734A1 (en) 1994-03-24 1995-03-23 Pre-cast concrete element and method of making same

Country Status (2)

Country Link
EP (1) EP0673734A1 (en)
GB (1) GB2287732A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2351692A (en) * 1999-07-07 2001-01-10 Tarmac Uk Ltd Improvements in or relating to moulding
WO2001053657A1 (en) * 2000-01-18 2001-07-26 Ceresola Tunnelbautechnik Ag Framework system
ITPN20120025A1 (en) * 2012-05-25 2013-11-26 Fama S P A SEALING DEVICE FOR SEALING CONCRETE BLOCKS AND ITS MANUFACTURING METHOD
EP2239416A3 (en) * 2009-04-02 2017-05-17 Herrenknecht AG Concrete tubing and method for manufacturing the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103901A (en) * 1976-12-27 1978-08-01 A-Lok Corporation Molded pleated gasket and device for installing same on pipe
DE8709843U1 (en) * 1987-07-17 1987-09-17 Hermann Mücher GmbH & Co KG, 5830 Schwelm Concrete drainage block
DE3934198A1 (en) * 1989-10-13 1991-04-18 Phoenix Ag Sealing strip of flexible material for tunnel section joints - comprises one-piece profile of projecting anchors joined by membrane to body
FR2678680A1 (en) * 1991-07-05 1993-01-08 Gtm Batimen Travaux Publ Sealant lining composed of prefabricated concrete elements, in particular for tunnels
FR2684134A1 (en) * 1991-11-26 1993-05-28 Joint Francais Prefabricated concrete element such as a tunnel arch stone (voussoir), sealing gasket of this element and method and mould for manufacturing this element

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE633048A (en) * 1962-06-05
FR2213379B1 (en) * 1973-01-09 1978-10-27 Bvs
EP0321645A1 (en) * 1987-12-04 1989-06-28 Hüls Troisdorf Aktiengesellschaft Joint strip for construction joints

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103901A (en) * 1976-12-27 1978-08-01 A-Lok Corporation Molded pleated gasket and device for installing same on pipe
DE8709843U1 (en) * 1987-07-17 1987-09-17 Hermann Mücher GmbH & Co KG, 5830 Schwelm Concrete drainage block
DE3934198A1 (en) * 1989-10-13 1991-04-18 Phoenix Ag Sealing strip of flexible material for tunnel section joints - comprises one-piece profile of projecting anchors joined by membrane to body
FR2678680A1 (en) * 1991-07-05 1993-01-08 Gtm Batimen Travaux Publ Sealant lining composed of prefabricated concrete elements, in particular for tunnels
FR2684134A1 (en) * 1991-11-26 1993-05-28 Joint Francais Prefabricated concrete element such as a tunnel arch stone (voussoir), sealing gasket of this element and method and mould for manufacturing this element

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2351692A (en) * 1999-07-07 2001-01-10 Tarmac Uk Ltd Improvements in or relating to moulding
WO2001003897A1 (en) * 1999-07-07 2001-01-18 Tarmac Limited Improvements in or relating to moulding concrete articles, in particular segments of lining for tunnel or pipeline
WO2001053657A1 (en) * 2000-01-18 2001-07-26 Ceresola Tunnelbautechnik Ag Framework system
EP2239416A3 (en) * 2009-04-02 2017-05-17 Herrenknecht AG Concrete tubing and method for manufacturing the same
ITPN20120025A1 (en) * 2012-05-25 2013-11-26 Fama S P A SEALING DEVICE FOR SEALING CONCRETE BLOCKS AND ITS MANUFACTURING METHOD
EP2666959A1 (en) * 2012-05-25 2013-11-27 Fama S.p.A. Sealing device of concrete blocks and manufacturing method to carry out the same
EP2666959B1 (en) 2012-05-25 2017-06-14 Fama S.p.A. Sealing device of concrete blocks and manufacturing method to carry out the same

Also Published As

Publication number Publication date
GB9405900D0 (en) 1994-05-11
GB2287732A (en) 1995-09-27

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