GB2287732A - 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
GB2287732A
GB2287732A GB9405900A GB9405900A GB2287732A GB 2287732 A GB2287732 A GB 2287732A GB 9405900 A GB9405900 A GB 9405900A GB 9405900 A GB9405900 A GB 9405900A GB 2287732 A GB2287732 A GB 2287732A
Authority
GB
United Kingdom
Prior art keywords
mould
concrete
concrete element
sealing
cast
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.)
Ceased
Application number
GB9405900A
Other versions
GB9405900D0 (en
Inventor
Terence 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.)
BUCHAN C V Ltd
CV Buchan Ltd
Original Assignee
BUCHAN C V Ltd
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 BUCHAN C V Ltd, CV Buchan Ltd filed Critical BUCHAN C V Ltd
Priority to GB9405900A priority Critical patent/GB2287732A/en
Publication of GB9405900D0 publication Critical patent/GB9405900D0/en
Priority to EP95301933A priority patent/EP0673734A1/en
Publication of GB2287732A publication Critical patent/GB2287732A/en
Ceased legal-status Critical Current

Links

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

Landscapes

  • 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)

Description

PRE-CAST CONCRETE ELEMENT 2287732 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 shaf t 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 precast concrete element having a sealing element protruding from a face thereof, 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 including 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, releasably entrapping the sealing element so as to protrude from an inner wall of the mould, pouring concrete into the mould and subsequently releasing the concrete element so formed with part of the sealing element protruding from a face thereof.
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 ef f ect, reference will now be made, by way of example, to the accompanying drawings in which:- is 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 f ixed in position in a side of the mould, and Figure 5 is a detailed view of the sealing strip f ixed 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 f our edges of a concrete member in the form of a precast 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 f acing grooves or notches 4 mid-way across its profile. These is 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 f orming a seal to prevent f low 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.
is 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 (11)

CLAIMS:
1. A pre-cast concrete element having a sealing element protruding from a face thereof, the sealing element having been incorporated in the concrete element at the time of casting.
2. A mould for making a pre-cast concrete element, the mould having means releasably to entrap a sealing element to be cast in the concrete element so as to protrude from a face thereof.
3. 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, wherein 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.
4. A pre-cast concrete element, or mould or method according to claim 1, 2 or 3, respectively, wherein the concrete element 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 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 is a sealing strip formed from a water swellable rubber or a resilient elastomeric material.
V 1
7. A concrete element, mould or method according to any one of the preceding claims, wherein the sealing element is provided with a profile which causes the sealing element to be firmly anchored in the concrete element.
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 is provided with opposed grooves into which respective parts of the mould can form a tight fit to enable the sealing element to be entrapped by the mould.
9. A pre-cast concrete element, substantially as hereinbefore described with reference to the accompanying drawings.
10. A mould for making a pre-cast concrete element, substantially as hereinbefore described with reference to the accompanying drawings.
11. A method of making a pre-cast concrete element, substantially as hereinbefore described with reference to the accompanying drawings.
GB9405900A 1994-03-24 1994-03-24 Pre-cast concrete element and method of making same Ceased GB2287732A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9405900A GB2287732A (en) 1994-03-24 1994-03-24 Pre-cast concrete element and method of making same
EP95301933A EP0673734A1 (en) 1994-03-24 1995-03-23 Pre-cast concrete element and method of making same

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
GB9405900D0 GB9405900D0 (en) 1994-05-11
GB2287732A true GB2287732A (en) 1995-09-27

Family

ID=10752469

Family Applications (1)

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

Country Status (2)

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

Families Citing this family (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
DE102009003726B3 (en) * 2009-04-02 2010-11-04 Herold Kunststofftechnik Betontübbing and method for producing the same
ITPN20120025A1 (en) * 2012-05-25 2013-11-26 Fama S P A SEALING DEVICE FOR SEALING CONCRETE BLOCKS AND ITS MANUFACTURING METHOD

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1006637A (en) * 1962-06-05 1965-10-06 Seuralite Improvements in joint sealing strips
GB1448467A (en) * 1973-01-09 1976-09-08 Bvs Prefabricated element for construction of a wall
EP0321645A1 (en) * 1987-12-04 1989-06-28 Hüls Troisdorf Aktiengesellschaft Joint strip for construction joints

Family Cites Families (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
DE3934198C2 (en) * 1989-10-13 2001-03-15 Phoenix Ag Sealing arrangement on a tunnel segment made of concrete with a sealing profile made of elastomeric material
FR2678680B1 (en) * 1991-07-05 1998-01-02 Gtm Batimen Travaux Publ WATERPROOFING COATING COMPOSED OF PREFABRICATED CONCRETE ELEMENTS, ESPECIALLY FOR TUNNELS.
FR2684134B1 (en) * 1991-11-26 1999-02-19 Joint Francais PREFABRICATED CONCRETE ELEMENT SUCH AS A TUNNEL SEAL, SEAL FOR THIS ELEMENT, AND METHOD AND MOLD FOR MANUFACTURING THE SAME.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1006637A (en) * 1962-06-05 1965-10-06 Seuralite Improvements in joint sealing strips
GB1448467A (en) * 1973-01-09 1976-09-08 Bvs Prefabricated element for construction of a wall
EP0321645A1 (en) * 1987-12-04 1989-06-28 Hüls Troisdorf Aktiengesellschaft Joint strip for construction joints

Also Published As

Publication number Publication date
EP0673734A1 (en) 1995-09-27
GB9405900D0 (en) 1994-05-11

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)