EP0673734A1 - Pre-cast concrete element and method of making same - Google Patents
Pre-cast concrete element and method of making same Download PDFInfo
- 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- Withdrawn
Links
- 239000011178 precast concrete Substances 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 65
- 239000004567 concrete Substances 0.000 claims abstract description 32
- 238000005266 casting Methods 0.000 claims abstract description 8
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000005060 rubber Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 6
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
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.
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)
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 concretetunnel lining segment 2, thesealing strip 1 having been incorporated in theconcrete segment 2 at the time of casting. - Figure 2 shows the
sealing strip 1 cast into the edge of thesegment 2, thesealing strip 1 being retained in the segment by one or more continuous orinterrupted anchors 3. If eachanchor 3 has a continuous profile, then it will also form a continuous water bar between thesegment 2 and thesealing strip 1. The water bar reduces the chance of moisture passing between the seal and the concrete due to imperfections in the concrete or thesealing 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 havinggrooves sealing strip 1, which is in this case continuous (thesealing strip 1 in Figure 3 is only shown diagrammatically). Themould 9 also includesside shutters 10 and adetachable 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 andanchor 3 inserted in thegroove 8 in one of theside shutters 10. The grooves 4 on thesealing strip 1 are held captive by facing protruding parts formed by a constriction orlips 12 in thegroove 8. It will be appreciated that thelips 12 can be located at any suitable position within thegroove sealing strip 1 which interlocks with thegroove sealing strips 1 should be resilient. - Figure 5 shows the
sealing strip 1 inserted in thegrooves 7 in the head of themould 9. The notches or grooves 4 on thesealing strip 1 are held captive by thelips 12 in thegroove 7. Again, thelips 12 or other constriction in thegrooves 7 can be at any position in the groove, the interaction between grooves 4 andlips 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 theanchor 3, viz. into the void at the base of thegroove - In order to allow vertical demoulding of the segment, it is necessary to have the
detachable sections 11 on the head of themould 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 thesegment 2 whilst being accurately held in position in themould 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)
- 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.
- 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.
- 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).
- 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.
- 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.
- 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.
- 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).
- 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.
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)
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)
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)
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 |
-
1994
- 1994-03-24 GB GB9405900A patent/GB2287732A/en not_active Ceased
-
1995
- 1995-03-23 EP EP95301933A patent/EP0673734A1/en not_active Withdrawn
Patent Citations (5)
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)
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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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE DK FR IE NL |
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18D | Application deemed to be withdrawn |
Effective date: 19960328 |