EP0809741B1 - Injection plug and injection method - Google Patents

Injection plug and injection method Download PDF

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Publication number
EP0809741B1
EP0809741B1 EP96934876A EP96934876A EP0809741B1 EP 0809741 B1 EP0809741 B1 EP 0809741B1 EP 96934876 A EP96934876 A EP 96934876A EP 96934876 A EP96934876 A EP 96934876A EP 0809741 B1 EP0809741 B1 EP 0809741B1
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EP
European Patent Office
Prior art keywords
packer
hole
fixing tube
seal
packer body
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.)
Expired - Lifetime
Application number
EP96934876A
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German (de)
French (fr)
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EP0809741A1 (en
Inventor
Juha Haavisto
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PPW-POLYPLAN WERKZEUGE GmbH
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection

Definitions

  • the present invention relates to a packer as defined in the preamble of claim 1 and to an injection method as defined in the preamble of claim 9.
  • cracks appear when the tension exceeds the tensile strength of the concrete. Such cracks significantly reduce the strength and service life of the structure.
  • the formation of cracks is mostly due to factors resulting from faulty design, over-stressing, movement of structures, excessive construction joints or defective work.
  • Such cracks generally less than one millimetre wide, extending over a large area and reaching the reinforcement, reduce the service life of the structure as the reinforcement undergoes faster corrosion, and lead to a reduced strength of the structure.
  • Especially cracks appearing in rock often lead to significant water damage as water flows through them into constructions.
  • Injection is generally performed by pumping injection material into the crack through a packer using pressure generated by means of a manual or mechanical injection device, the crack being packed with the mixture solidifying in it.
  • the mixture is introduced using disposable connectors, which are placed in holes made around or in the crack so that they remain in position while a liquid mixture is being pumped into the crack.
  • a suitable injection pressure and the distances between injection points are determined via a preliminary test carried out prior to the operation.
  • a known device currently used in the procedure described above is a packer comprising a rubber seal around a plug placed in the hole.
  • the rubber seal is pressed into the hole by means of a tightening sleeve placed at the outer end of the plug, said sleeve being provided with a thread.
  • a tightening sleeve placed at the outer end of the plug, said sleeve being provided with a thread.
  • the inner end of the plug is provided with a check valve, formed by a ball and a spring, designed to prevent the mass forced into the crack from flowing back through the plug.
  • the tightening element can be detached from the rest of the packer, so it can be used several times.
  • Patent specification CH-A-644662 and patent applications WO-A-84/01601 and FI-A-821905 present packers which, in respect of both structure and operation, substantially correspond to the one described above.
  • the object of the present invention is to eliminate the drawbacks referred to above.
  • a specific object of the invention is to produce a new type of packer which, both in respect of construction and use, is as simple as possible and reliably seals and closes the hole in all possible pressure conditions.
  • the packer of the invention comprises a packer body designed to be inserted into a hole drilled in a structure to be mended, said packer body having a part with a conical outer surface, a seal being provided around the packer body.
  • the packer comprises a fixing tube which, when the packer is in the hole, protrudes out of the hole, and in the packer body a check valve which, with respect to the fixing tube, is located on the opposite side of the seal and opens into the hole, said check valve communicating with the outer end of the fixing tube via a hole going through the packer body and the fixing tube.
  • the packer body and the fixing tube are implemented as a single, continuous integral body, preferably fabricated from plastic by the injection moulding technique.
  • the seal is as simple as possible in construction, in other words, it consists of an elastic tube of constant circular cross-section which can slide between and around the fixing tube and the conical part of the packer body, in other words, the seal is a straight piece of elastic tube.
  • the outer end of the fixing tube is preferably provided with a draw stop, such as a lobe, set-off, indentation or other irregularity or relief of surface allowing the packer to be gripped firmly with a suitable tool so that it can be vigorously pulled outward from the hole while the seal is being held in place in the hole.
  • a draw stop such as a lobe, set-off, indentation or other irregularity or relief of surface allowing the packer to be gripped firmly with a suitable tool so that it can be vigorously pulled outward from the hole while the seal is being held in place in the hole.
  • the outer end of the fixing tube is so shaped that the nozzle of the injection device can be tightly connected to the packer without a separate injection cock or grease nipple.
  • the inner end of the conical packer body of the packer i.e. the body end pointing toward the check valve, is preferably provided with a limit stop, such as an annular collar, which forms a stopper that hits the stationary seal when the packer is being pulled outwards from the hole.
  • a limit stop such as an annular collar, which forms a stopper that hits the stationary seal when the packer is being pulled outwards from the hole.
  • the flange receives the counterpressure generated in the course of the injection work and utilizes this pressure to squeeze the packer more tightly in the bore hole.
  • the valve at the inner end of the body is formed by a transverse aperture in the body, the packer body being provided with a longitudinal hole extending from its outer end towards the inner end down to this transverse aperture, and by an elastic sheath placed on the outlet or outlets of the transverse aperture. Due to its elasticity, this sheath blocks the outlet or outlets in normal conditions, thus acting as a check valve during injection.
  • the elastic sheath preferably also consists of a straight piece of elastic tube.
  • the above-described packer according to the invention is used.
  • the unitary integral body formed by the fixing tube and the packer body is inserted, with a grip by the fixing tube, into a hole drilled in the structure to be repaired.
  • the integral body is tightened in the hole by holding the seal around it immovable in the hole and pulling at the fixing tube by its outer end, causing the seal to be squeezed between the interior surface of the hole and the conical part of the packer.
  • packing material can be pumped through the packer into the hole. Either immediately thereupon or later after the injected mass has settled down, the part of the fixing tube remaining outside the hole is broken off e.g. by simply applying a transverse blow to the base of the fixing tube, whereupon the hole can be patched up.
  • the packer and injection method of the invention have significant advantages as compared with prior art.
  • the invention is very simple in construction, only consisting of a body piece, which can be fabricated in a simple manner e.g. by the injection moulding technique, and two tubular sheaths of elastic material placed around it.
  • the packer is very cheap to manufacture.
  • the packer is easy to use and it can be mounted in place using a suitable tool with one hand and only a small effort.
  • the packer can be easily broken off from the hole, leaving the pressure in the structure, so the hole can be capped even in connection with the same operation.
  • a packer according to the invention as shown in Fig. 1 comprises an elongated packer body 1 having a relatively pointed inner end 3 and a tubular fixing tube 13 forming a straight and seamless extension of the packer body and provided with an outer end 4 having a round shape resembling a grease nipple.
  • Inside the packer body and fixing tube there is a longitudinal hole 5 extending from the outer end 4 to a point close to the inner end 3 of the packer body, opening to the exterior surface of the packer body via a transverse aperture 11.
  • transverse aperture 11 Disposed around the transverse aperture 11 is an elastic rubber sheath, covering the outlets of the aperture 11.
  • the transverse aperture 11 and the sheath 12 form a check valve that permits outward flow from the hole 5 through the aperture 11 and out from under the sheath 12 while preventing reverse flow back into the hole 5.
  • the packer body 1 comprises a conical part 8 of circular cross-section, extending from the valve towards the outer end of the packer body and tapering towards the outer end and the fixing tube. After the conical part there is a fixing tube 13 of uniform thickness, ending at a shoulder or draw stop 9. The conical part 8 thus widens towards the inner end 3 of the packer body 1, ending before the valve at an expansion of the packer body, a ring-like collar forming a limiter 10. A ring-shaped collar is also formed in the packer body 1 on the side facing towards the check valve 6, so that the pressure prevailing in the hole is applied to this collar, pressing the packer body outwards and tightening the packer in a manner to be described later on.
  • a seal 7 made of elastic and flexible material, e.g. a piece of rubber hose, which is of a size that allows it to slide on both the straight part and the conical part between the draw stop 9 and the limiter 10.
  • the length of the seal 7 is substantially shorter than the lengths of the fixing tube 13 and the conical part 8 together.
  • the packer presented in Fig. 1 is used as follows.
  • a hole 2 has been drilled in the structure to be treated. In concrete structures, the mouth of the hole is generally more or less ragged.
  • the packer is inserted into the hole with the seal 7 substantially in the area of the straight fixing tube 13.
  • the packer is inserted to a depth such that the seal 7 lies completely in the undamaged hole area, somewhat sunk in from the mouth of the hole.
  • a pressure is applied to the upper edge of the seal 7 in the direction of arrows A to hold it in position while at the same time gripping the draw stop 9 at the outer end 4 and drawing it straight outwards as indicated by arrow B.
  • the packer is preferably mounted using a special mounting tool by means of which the seal can be held in position and a pull exerted on the draw stop at the same time.
  • the conical part 8 of the packer body 1 is thrust into the seal 7, pressing the seal against the interior surface of the hole.
  • the pulling action B is continued until the limiter 10 hits the lower edge of the seal 7.
  • the seal has been squeezed very tightly between the conical surface 8 and the interior surface of the hole 2, whereupon it is possible, in a manner known in itself, to attach a hose or connector to the outer end 4 of the packer body 1 to inject suitable packing material into the hole 2 while the check valve 6 prevents the mass from flowing back into the hole 5.
  • the conical shape of the body ensures that the packer cannot be pushed out of the hole by the counterpressure generated in the hole and the crack, because the pressure is applied to the body 1 and especially to the flange 10, which is pressed against the seal 7, thus squeezing it more tightly in the hole.
  • the packer is preferably fabricated from a suitable plastic material e.g. by the injection moulding technique, and the part of the packer remaining above the seal 7 can easily be broken off from the hole 2 and the hole can be capped using suitable material. According to the tests carried out, the packer of the invention is fully pressure-proof, having a pressure resistance of at least 250 bar, yet it performs perfectly in low-pressure injection as well, which may involve the use of pressures below 10 bar.

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  • Chemical Kinetics & Catalysis (AREA)
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  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
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Abstract

A packer and a corresponding method for filling cracks in concrete structures with packing material pumped into the crack. The packer comprises a packer body (1) designed to be inserted into a hole (2) drilled in the structure to be repaired, said packer body having a part (8) with a conical outer surface and a seal (7) around the packer body; a fixing tube (13) which, when the packer is in the hole, protrudes out of the hole; and a check valve (6) in the packer body, located on the opposite side of the seal with respect to the fixing tube, which check valve opens into the hole and communicates with the outer end (4) of the fixing tube via a hole (5) going through the packer body and the fixing tube. According to the invention, the packer body and the fixing tube form a single, continuous cast integral body and the seal (7) consists of an elastic tube of constant circular cross section which can slide between and around the fixing tube and the conical part (8) of the packer body.

Description

The present invention relates to a packer as defined in the preamble of claim 1 and to an injection method as defined in the preamble of claim 9.
In concrete structures, such as bridges, supporting walls, foundations, pillars, girders and various underground tunnels, cracks appear when the tension exceeds the tensile strength of the concrete. Such cracks significantly reduce the strength and service life of the structure. The formation of cracks is mostly due to factors resulting from faulty design, over-stressing, movement of structures, excessive construction joints or defective work. Such cracks, generally less than one millimetre wide, extending over a large area and reaching the reinforcement, reduce the service life of the structure as the reinforcement undergoes faster corrosion, and lead to a reduced strength of the structure. Especially cracks appearing in rock often lead to significant water damage as water flows through them into constructions.
Generally it is assumed that a cracked structure can be restored to its original strength by the injection method. Injection is generally performed by pumping injection material into the crack through a packer using pressure generated by means of a manual or mechanical injection device, the crack being packed with the mixture solidifying in it. The mixture is introduced using disposable connectors, which are placed in holes made around or in the crack so that they remain in position while a liquid mixture is being pumped into the crack. A suitable injection pressure and the distances between injection points are determined via a preliminary test carried out prior to the operation.
A known device currently used in the procedure described above is a packer comprising a rubber seal around a plug placed in the hole. The rubber seal is pressed into the hole by means of a tightening sleeve placed at the outer end of the plug, said sleeve being provided with a thread. When the sleeve is screwed onto the plug, it causes the seal to be pressed against the interior surface of the hole. The inner end of the plug is provided with a check valve, formed by a ball and a spring, designed to prevent the mass forced into the crack from flowing back through the plug. After use, the tightening element can be detached from the rest of the packer, so it can be used several times.
Patent specification CH-A-644662 and patent applications WO-A-84/01601 and FI-A-821905 present packers which, in respect of both structure and operation, substantially correspond to the one described above.
The worst problem with prior-art packers is that they have a complicated construction and are therefore expensive. The task of connecting the fixing tube to the packer and especially detaching it from it, often in difficult working conditions, significantly retards the injection job. Depending on the job, as many as thousands of packers are needed, so their use should be as quick and simple as possible; being used in large quantities, they involve significant additional costs if they are expensive.
The object of the present invention is to eliminate the drawbacks referred to above. A specific object of the invention is to produce a new type of packer which, both in respect of construction and use, is as simple as possible and reliably seals and closes the hole in all possible pressure conditions.
As for the features characteristic of the invention, reference is made to the claims.
The packer of the invention comprises a packer body designed to be inserted into a hole drilled in a structure to be mended, said packer body having a part with a conical outer surface, a seal being provided around the packer body. Moreover, the packer comprises a fixing tube which, when the packer is in the hole, protrudes out of the hole, and in the packer body a check valve which, with respect to the fixing tube, is located on the opposite side of the seal and opens into the hole, said check valve communicating with the outer end of the fixing tube via a hole going through the packer body and the fixing tube.
According to the invention, the packer body and the fixing tube are implemented as a single, continuous integral body, preferably fabricated from plastic by the injection moulding technique. Furthermore, according to the invention, the seal is as simple as possible in construction, in other words, it consists of an elastic tube of constant circular cross-section which can slide between and around the fixing tube and the conical part of the packer body, in other words, the seal is a straight piece of elastic tube.
The outer end of the fixing tube is preferably provided with a draw stop, such as a lobe, set-off, indentation or other irregularity or relief of surface allowing the packer to be gripped firmly with a suitable tool so that it can be vigorously pulled outward from the hole while the seal is being held in place in the hole. Preferably the outer end of the fixing tube is so shaped that the nozzle of the injection device can be tightly connected to the packer without a separate injection cock or grease nipple.
The inner end of the conical packer body of the packer, i.e. the body end pointing toward the check valve, is preferably provided with a limit stop, such as an annular collar, which forms a stopper that hits the stationary seal when the packer is being pulled outwards from the hole. Thus, the limit stop prevents the packer from being pulled out too far. The flange receives the counterpressure generated in the course of the injection work and utilizes this pressure to squeeze the packer more tightly in the bore hole.
The valve at the inner end of the body is formed by a transverse aperture in the body, the packer body being provided with a longitudinal hole extending from its outer end towards the inner end down to this transverse aperture, and by an elastic sheath placed on the outlet or outlets of the transverse aperture. Due to its elasticity, this sheath blocks the outlet or outlets in normal conditions, thus acting as a check valve during injection. The elastic sheath preferably also consists of a straight piece of elastic tube.
In the injection procedure of the invention, the above-described packer according to the invention is used. In the procedure, the unitary integral body formed by the fixing tube and the packer body is inserted, with a grip by the fixing tube, into a hole drilled in the structure to be repaired. The integral body is tightened in the hole by holding the seal around it immovable in the hole and pulling at the fixing tube by its outer end, causing the seal to be squeezed between the interior surface of the hole and the conical part of the packer. After this, packing material can be pumped through the packer into the hole. Either immediately thereupon or later after the injected mass has settled down, the part of the fixing tube remaining outside the hole is broken off e.g. by simply applying a transverse blow to the base of the fixing tube, whereupon the hole can be patched up.
The packer and injection method of the invention have significant advantages as compared with prior art. The invention is very simple in construction, only consisting of a body piece, which can be fabricated in a simple manner e.g. by the injection moulding technique, and two tubular sheaths of elastic material placed around it. Thus, the packer is very cheap to manufacture. Moreover, the packer is easy to use and it can be mounted in place using a suitable tool with one hand and only a small effort. In addition, the packer can be easily broken off from the hole, leaving the pressure in the structure, so the hole can be capped even in connection with the same operation.
In the following, the invention is described in detail by the aid of the attached drawings, in which
  • Fig. 1 presents a packer as provided by the invention, partially sectioned,
  • Fig. 2 shows how the packer of Fig. 1 is inserted into a hole, and
  • Fig. 3 shows the packer of Fig. 1, mounted in a hole and ready for use.
    • A packer according to the invention as shown in Fig. 1 comprises an elongated packer body 1 having a relatively pointed inner end 3 and a tubular fixing tube 13 forming a straight and seamless extension of the packer body and provided with an outer end 4 having a round shape resembling a grease nipple. Inside the packer body and fixing tube there is a longitudinal hole 5 extending from the outer end 4 to a point close to the inner end 3 of the packer body, opening to the exterior surface of the packer body via a transverse aperture 11.
    Disposed around the transverse aperture 11 is an elastic rubber sheath, covering the outlets of the aperture 11. Thus, the transverse aperture 11 and the sheath 12 form a check valve that permits outward flow from the hole 5 through the aperture 11 and out from under the sheath 12 while preventing reverse flow back into the hole 5.
    The packer body 1 comprises a conical part 8 of circular cross-section, extending from the valve towards the outer end of the packer body and tapering towards the outer end and the fixing tube. After the conical part there is a fixing tube 13 of uniform thickness, ending at a shoulder or draw stop 9. The conical part 8 thus widens towards the inner end 3 of the packer body 1, ending before the valve at an expansion of the packer body, a ring-like collar forming a limiter 10. A ring-shaped collar is also formed in the packer body 1 on the side facing towards the check valve 6, so that the pressure prevailing in the hole is applied to this collar, pressing the packer body outwards and tightening the packer in a manner to be described later on. Fitted around the straight fixing tube 13 and the conical part 8 is a seal 7 made of elastic and flexible material, e.g. a piece of rubber hose, which is of a size that allows it to slide on both the straight part and the conical part between the draw stop 9 and the limiter 10. The length of the seal 7 is substantially shorter than the lengths of the fixing tube 13 and the conical part 8 together.
    Referring to Fig. 2 and 3, the packer presented in Fig. 1 is used as follows. A hole 2 has been drilled in the structure to be treated. In concrete structures, the mouth of the hole is generally more or less ragged. The packer is inserted into the hole with the seal 7 substantially in the area of the straight fixing tube 13. The packer is inserted to a depth such that the seal 7 lies completely in the undamaged hole area, somewhat sunk in from the mouth of the hole. Next, a pressure is applied to the upper edge of the seal 7 in the direction of arrows A to hold it in position while at the same time gripping the draw stop 9 at the outer end 4 and drawing it straight outwards as indicated by arrow B. The packer is preferably mounted using a special mounting tool by means of which the seal can be held in position and a pull exerted on the draw stop at the same time. When this is done, the conical part 8 of the packer body 1 is thrust into the seal 7, pressing the seal against the interior surface of the hole. The pulling action B is continued until the limiter 10 hits the lower edge of the seal 7. In this way, the seal has been squeezed very tightly between the conical surface 8 and the interior surface of the hole 2, whereupon it is possible, in a manner known in itself, to attach a hose or connector to the outer end 4 of the packer body 1 to inject suitable packing material into the hole 2 while the check valve 6 prevents the mass from flowing back into the hole 5. The conical shape of the body ensures that the packer cannot be pushed out of the hole by the counterpressure generated in the hole and the crack, because the pressure is applied to the body 1 and especially to the flange 10, which is pressed against the seal 7, thus squeezing it more tightly in the hole.
    The packer is preferably fabricated from a suitable plastic material e.g. by the injection moulding technique, and the part of the packer remaining above the seal 7 can easily be broken off from the hole 2 and the hole can be capped using suitable material. According to the tests carried out, the packer of the invention is fully pressure-proof, having a pressure resistance of at least 250 bar, yet it performs perfectly in low-pressure injection as well, which may involve the use of pressures below 10 bar.
    The invention has been described above by presenting an example by the aid of the attached drawings, but different embodiments of the invention are possible within the framework of the claims.

    Claims (9)

    1. Packer for filling cracks in concrete structures with packing material pumped into the crack, said packer comprising
      a packer body (1) designed to be inserted into a hole (2) drilled in the structure to be repaired, said packer body having a part (8) with a conical outer surface, a seal (7) being provided around the packer body,
      a fixing tube (13) which, when the packer is in the hole, protrudes out of the hole,
      a check valve (6) in the packer body, located on the opposite side of the seal with respect to the fixing tube, said check valve opening into the hole and communicating with the outer end (4) of the fixing tube via a hole (5) going through the packer body and the fixing tube,
      characterized in that the packer body and the fixing tube form a single, continuous cast integral body and the seal (7) consists of an elastic tube of constant circular cross-section, slidable between and around the fixing tube and the conical part (8) of the packer body.
    2. Packer as defined in claim 1, characterized in that the outer end of the fixing tube (13) is provided with a draw stop (9), by which it can be drawn outwards.
    3. Packer as defined in claim 2, characterized in that the draw stop (9) consists of a boss at the outer end of the fixing tube.
    4. Packer as defined in any one of claims 1 - 3, characterized in that the wider end of the conical part (8), the end pointing toward the check valve, is provided with a limiter (10), which is drawn up into contact with the edge of the seal (7) when the packer is being mounted in the hole.
    5. Packer as defined in any one of claims 1 - 4, characterized in that the check valve (6) is formed by an outlet aperture (11) transverse with respect to the longitudinal direction of the hole (5) and an elastic sheath (12) covering it.
    6. Packer as defined in claim 5, characterized in that the elastic sheath (12) consists of a straight elastic tube of constant circular cross-section.
    7. Packer as defined in claim 1, characterized in that the integral body is a plastic body produced by the injection moulding technique.
    8. Packer as defined in claim 1, characterized in that the fixing tube (13) forms a straight extension of uniform thickness to the conical part (8) of the packer body (1).
    9. Injection method for filling cracks in concrete structures with packing material pumped into the crack via a packer comprising
      a packer body (1) designed to be inserted into a hole (2) drilled in the structure to be repaired, said packer body having a part (8) with a conical outer surface and a seal (7) around the packer body,
      a fixing tube (13) which, when the packer is in the hole, protrudes out of the hole,
      a check valve (6) in the packer body, located on the opposite side of the seal with respect to the fixing tube, said check valve opening into the hole and communicating with the outer end (4) of the fixing tube via a hole (5) going through the packer body and the fixing tube,
      characterized in that the method involves performing the following steps:
      the unitary, injection-moulded integral body formed by the fixing tube (13) and the packer body (1) is inserted into the hole (2),
      the integral body is tightened in the hole by holding the seal (7) immovable in the hole and pulling outwards by the fixing tube,
      packing material is pumped through the packer into the hole,
      the part of the fixing tube remaining outside the hole is broken off, and
      the hole is patched up.
    EP96934876A 1995-11-15 1996-11-04 Injection plug and injection method Expired - Lifetime EP0809741B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FI955515 1995-11-15
    FI955515A FI955515A0 (en) 1995-11-15 1995-11-15 Injekteringspropp
    PCT/FI1996/000590 WO1997018367A1 (en) 1995-11-15 1996-11-04 Injection plug and injection method

    Publications (2)

    Publication Number Publication Date
    EP0809741A1 EP0809741A1 (en) 1997-12-03
    EP0809741B1 true EP0809741B1 (en) 1998-07-08

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    Application Number Title Priority Date Filing Date
    EP96934876A Expired - Lifetime EP0809741B1 (en) 1995-11-15 1996-11-04 Injection plug and injection method

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    EP (1) EP0809741B1 (en)
    AT (1) ATE168159T1 (en)
    AU (1) AU7300896A (en)
    DE (1) DE69600413T2 (en)
    DK (1) DK0809741T3 (en)
    FI (1) FI955515A0 (en)
    WO (1) WO1997018367A1 (en)

    Families Citing this family (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    SE509139C2 (en) * 1997-04-10 1998-12-07 Skanska Anlaeggning Ab Ways to simultaneously seal cracks around boreholes and anchor a rock bolt, as well as rock bolt
    DE19911259B4 (en) * 1999-03-13 2015-07-02 Hilti Aktiengesellschaft Auxiliary device for filling boreholes with mortar masses
    SE9901153L (en) * 1999-03-30 2000-01-24 Bengt Arvidsson Method and apparatus for injecting curable pulp into cavities, whereby the pulp is vibrated
    FR2886325B1 (en) 2005-05-30 2008-05-30 Charline Marie Henriet Lemaire CONTROLLED INJECTION PISTOL OF CLAMS IN LOCAL AREAS OF WORKS HAVING WATER SEALING DEFECTS
    JP4522341B2 (en) 2005-08-05 2010-08-11 Ｆｓテクニカル株式会社 Injection nozzle and pinning method using the same
    CN100425786C (en) * 2006-07-14 2008-10-15 山东省建筑科学研究院 Self-pressing crack treating device and construction technique

    Family Cites Families (3)

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    Publication number Priority date Publication date Assignee Title
    AT368248B (en) * 1980-01-30 1982-09-27 Scheiber Wilfried INJECTION PACKER FOR HOLE HOLE CLOSURES
    DE3203871A1 (en) * 1982-02-05 1983-08-18 Artur Dr.H.C. 7244 Waldachtal Fischer HIGH PRESSURE PACKER FOR INJECTING RESIN IN CONCRETE Cracks
    DE3724559A1 (en) * 1987-07-24 1989-02-02 Hilti Ag METHOD FOR STRENGTHENING TORN COMPONENTS

    Also Published As

    Publication number Publication date
    DK0809741T3 (en) 1999-04-19
    WO1997018367A1 (en) 1997-05-22
    EP0809741A1 (en) 1997-12-03
    AU7300896A (en) 1997-06-05
    FI955515A0 (en) 1995-11-15
    DE69600413T2 (en) 1999-04-15
    ATE168159T1 (en) 1998-07-15
    DE69600413D1 (en) 1998-08-13

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