EP0665337A1 - Method for fitting a grouted anchor for anchoring revetment walls, buildings, bank protection works, quay walls and the like and grouted anchor which can be used for carrying out this method - Google Patents
Method for fitting a grouted anchor for anchoring revetment walls, buildings, bank protection works, quay walls and the like and grouted anchor which can be used for carrying out this method Download PDFInfo
- Publication number
- EP0665337A1 EP0665337A1 EP95200183A EP95200183A EP0665337A1 EP 0665337 A1 EP0665337 A1 EP 0665337A1 EP 95200183 A EP95200183 A EP 95200183A EP 95200183 A EP95200183 A EP 95200183A EP 0665337 A1 EP0665337 A1 EP 0665337A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rod
- pipe
- grout
- grouted anchor
- drill bit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
Definitions
- the invention primarily relates to a method for fitting a grouted anchor in order to anchor revetment walls, buildings, bank protection works, quay walls and the like.
- a method of this type is known. With this method, a pipe which has a leave-in-place foot is pushed, screwed or struck into the ground, a tension member is worked into the pipe, the pipe is filled with grout, a screw cap is screwed onto the top of the pipe, the pipe is pulled back step by step and, at the same time, grout under high pressure (about 20 bar) is introduced via the pipe into the ground. The pipe is thus removed and the tension member with grouted anchor and the leave-in-place foot remain behind.
- a significant disadvantage of this method is that introduction of the pipe into the ground and its subsequent withdrawal are time-consuming.
- the aim of the invention is to overcome this disadvantage and to provide a method by means of which a grouted anchor can be fitted rapidly and at relatively low cost.
- the method according to the invention comprises the following steps:
- the lower end of the rod is brought to the desired depth while grout is fed in under normal pressure and the rod is then withdrawn from the ground over the desired length of the grout body.
- the rod can have a drill bit at its lower end and can be introduced into the ground by pushing and turning.
- the drill bit can be provided with a propeller blade which has 0.2 to 5 screw turns.
- the rod can be provided with helically arranged ridges and the drill bit can be screwed to the lower end of the rod with the aid of a nut welded to the bit. It is possible to drive the rod into the ground, in which case a number of small tubes or hoses for supplying liquid and grout have their outlets at various heights above the lower end of the rod.
- the invention also relates to a grouted anchor consisting of a solid or hollow rod which, at least at the lower end, is provided with a screw thread or helically arranged ridges.
- a drill bit is screwed onto the lower end of the rod.
- the element connecting the drill bit to the rod is preferably a nut.
- said bit comprises one or more triangular plates which on one side are connected to the connecting element.
- a core rod can be fixed to the connecting element, such as the nut, and a propeller blade which has 0.2 to 5 screw turns and a minimum diameter which is greater than the diameter of the connecting element can be located around said core rod.
- the diameter of the propeller blade preferably tapers.
- Very long rods can be composed of sections which are coupled to one another by means of couplings.
- a pipe can be arranged around the tension member, which pipe is fixed to the drill bit, for example by making slots in the lower end of the pipe, into which slots the top edge of the drill bit projects.
- the end section of the pipe intended for adhesion of grout will be roughened to provide better adhesion.
- a small tube is arranged at least around the lowermost section of the tension member, which tube has its outlet in the vicinity of the drill bit, a pipe section enclosing the lower end of the tension member and said small tube over the length of the grout body to be introduced and a force-transmitting medium (for example grout) being introduced into the gap between the pipe section and the tension member.
- a force-transmitting medium for example grout
- the upper end of said pipe section can be connected to a pipe arranged around the tension member.
- the closed lower end of said pipe can be connected to a union to which the small tube positioned in the gap between pipe section and tension member is connected.
- the tension member 1 shown in Figure 1 is made of high-grade steel onto which ridges 2 have been rolled which run in a helical pattern with respect to one another.
- a drill bit 3 is composed of a triangular steel plate onto which a nut 4 has been welded. Said nut is screwed onto the lower end of the tension member 1.
- a small tube 5 runs along the entire rod 1 and is fixed to the rod with the aid of clamps 6 and has its outlet in the vicinity of the drill bit 3.
- Figure 2 shows the first stage of production, in which the rod 1 is introduced into the ground by pushing and turning and, during this operation, water or bore flushing liquid is introduced into the hole via the tube 5.
- the rod has reached the desired depth and during the last part of drilling, instead of water, grout has been supplied via the tube 5. Said grout is indicated by 7.
- the lowermost section of the rod with drill bit now extends into a firm layer of ground, such as a layer of sand.
- the rod is then withdrawn from the ground over the desired length of the grout body (see section shown in broken lines in Figure 3) and grout under high pressure (greater than 15 bar, preferably about 20 bar) is then injected into the borehole via the tube 5 and, at the same time, the lower end of the rod is pushed back down to the desired depth.
- grout under high pressure greater than 15 bar, preferably about 20 bar
- the grout under high pressure displaces ground around the bottom of the drilled hole and the grout body 8 forms from grout and any soil (sand) mixed therewith, which grout body 8 is allowed to set.
- a somewhat longer rod will be composed of sections which are coupled to one another by means of couplings.
- Figure 5 shows an essentially triangular plate 10 which is welded to a nut 11.
- An incision 12 has been cut out at the lower end of the triangular plate and a rectangular opening 13 has also been cut into the plate.
- the triangular plate 14 according to Figure 6 has an incision comprising a tapering section 15, a section 16 which has a width smaller than the thickness of the plate 10 and a section 17 which has a width equal to the thickness of the plate 10.
- Two projections 18 protrude from the top surface of the plate 14. Said projections have a sloping face on the outside.
- the plate 14 is slid over the plate 10 into a position perpendicular to the plate 10 - as soon as the section 16 of the incision in the plate 14 is opposite the opening 13 in the plate 10, the plate 14 is clicked home with respect to the plate 10, the projections 18 protruding into the nut 11.
- the resulting union between the plates 10 and 14 is strong without welding work having to be carried out.
- the height of the section 16 of the incision is somewhat smaller than the height of the opening 13, that is to say the walls of the tapering section 15 end beneath the top edge of the opening 13.
- a core rod around which a half to two turn(s) of a propeller blade are fixed, is welded to the nut 4.
- the diameter of the propeller blade can taper.
- a pipe 19 can be arranged, instead of the tube 5, around the tension member 1, which pipe 19 is able to withstand at least a pressure of 25 bar and is preferably made of plastic instead of metal.
- slots 22 in the pipe for example at the lower end of the pipe 19, in the vicinity of the drill bit 3, so that the pipe 19 is fitted over a plate of the drill bit 3, it is possible to transmit the moment of torsion, acting on the pipe 19 and caused by the setting grout, to the drill bit and thus to the tension member 1.
- Other methods are also possible for connecting the pipe 19 to the drill bit 3 or tension member 1, so that the pipe 19 also turns as the tension member 1 rotates.
- the pipe 19 has an internal diameter such that sufficient gap remains between the pipe 19 and the nut 4 to allow the requisite liquid and/or grout to pass.
- grout of high quality is present between the tension member 1 and the pipe 19 at the lower end of the anchor, in the area of the grout body.
- grout of lower to very low strength, or another anti-corrosion medium, which can also be a liquid, can be present in the gap between the tension member 1 and the pipe 19.
- the pipe 19 ensures that any aggressive medium present in the ground is not able to reach the tension member 1, or can do so only with difficulty.
- both the inside and outside of the pipe 19 can be roughened in the region of the grout body to be formed.
- a tension anchor of this type is very long, for example longer than 8 metres, it is made up of various tension members 1.
- the tension members are coupled to one another by means of nut bushes 20, which are provided with a screw thread.
- said pipe 19 is used around the tension member 1, said pipe also consists of various lengths which are connected to one another by couplings 21. It is also pointed out that the pipe 19 is closed off at the top of the tension anchor during injection with grout or water.
- FIG. 9 Another embodiment is illustrated in Figure 9.
- the important feature is the fitting of a pipe section 23, specifically over the length of the grout body in the vicinity of the lower section of the tension member.
- the pipe section 23 is a smooth tube which optionally has been roughened or, for example, a ribbed tube made of plastic.
- Said pipe section 23 encloses the tension member 1 and the tube 5 and has an internal diameter of a size such that the tube 5 can pass between the pipe section 23 and the nut.
- grout or another force-transmitting medium is introduced under controlled conditions, for example in the factory, between the pipe section 23 and the tension member 1, over the section where the grout body is to be produced.
- the tube 5 is fitted around the tension member 1 beforehand, optionally with clamps 6, at least for the section where grout has been introduced in the factory. After the grout has set, the tube 5 is embedded and firmly joined over said section to the tension member 1.
- the pipe section 23 is now also firmly joined to the tension member 1 and can also terminate before or at the drill bit 3.
- the tube 5 is placed along the entire tension member 1, without a pipe being fitted around the tension member 1. It is also possible that a tube 5 is fitted around the entire tension member 1 and that a smooth pipe 19 is positioned starting from the pipe section 23 in the manner shown in Figure 8, the pipe section 23 being connected to the pipe 19 by means of known connecting means. Another possibility is that the pipe 19 is closed at the bottom in the vicinity of the pipe section 23 and has a connector to which the tube 5, emerging from the gap between the pipe section 23 and the tension member 1, can be connected. The pipe 19 can then be connected to the pipe section 23 in order to prevent rotation of the pipe 19 with respect to the tension member 1. In this case, during the injection of grout, grout first flows through the gap between the pipe 19 and the tension member 1 and then through the tube 5 to the injection locations in the vicinity of the drill bit or elsewhere at locations in the pipe section 23, which may or may not be ribbed.
- a tube 5 or pipe 19 can be provided beforehand with screening or sealing means, which are dislodged, as soon as grout injection is started, by the high internal pressure then prevailing.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
- a solid or hollow anchor rod (1) made of high-grade steel is introduced into the ground,
- via a cavity in the anchor rod, a pipe fitted around the rod and/or one or more small tubes (5) which are fixed to the outside of the rod, liquid is fed into the hole around the rod while the rod is introduced into the ground,
- grout is fed via said rod cavity, pipe and/or small tubes (5) as soon as the lower end of the rod has reached the desired level from the top of the grout body,
- grout is introduced under a pressure of at least 15 bar into the ground via said rod cavity, pipe and/or small tubes,
- the lower end of the rod is brought to the desired depth while the grout is fed in under high pressure and
- the grout is allowed to set.
Description
- The invention primarily relates to a method for fitting a grouted anchor in order to anchor revetment walls, buildings, bank protection works, quay walls and the like.
- A method of this type is known. With this method, a pipe which has a leave-in-place foot is pushed, screwed or struck into the ground, a tension member is worked into the pipe, the pipe is filled with grout, a screw cap is screwed onto the top of the pipe, the pipe is pulled back step by step and, at the same time, grout under high pressure (about 20 bar) is introduced via the pipe into the ground. The pipe is thus removed and the tension member with grouted anchor and the leave-in-place foot remain behind.
- A significant disadvantage of this method is that introduction of the pipe into the ground and its subsequent withdrawal are time-consuming.
- The aim of the invention is to overcome this disadvantage and to provide a method by means of which a grouted anchor can be fitted rapidly and at relatively low cost. To this end, the method according to the invention comprises the following steps:
- introducing into the ground a solid or hollow anchor rod made of high-grade steel,
- via a cavity in the rod, a pipe fitted around the rod and/or one or more small tubes which are fixed to the outside of the rod and at least one of which terminates in the vicinity of the lower end of the rod, feeding liquid into the hole around the rod while the rod is introduced into the ground,
- feeding grout via said rod cavity, pipe and/or small tubes as soon as the lower end of the rod has reached the desired level from the top of the grout body,
- introducing grout under a pressure of at least 15 bar into the ground via said small tubes, pipe and/or cavity,
- bringing the lower end of the rod to the desired depth while the grout is fed in under high pressure and
- allowing the grout to set.
- Before introducing grout under a pressure of at least 15 bar into the ground, it is preferable that the lower end of the rod is brought to the desired depth while grout is fed in under normal pressure and the rod is then withdrawn from the ground over the desired length of the grout body.
- The rod can have a drill bit at its lower end and can be introduced into the ground by pushing and turning.
- The drill bit can be provided with a propeller blade which has 0.2 to 5 screw turns. In order to join anchor rod and drill bit, the rod can be provided with helically arranged ridges and the drill bit can be screwed to the lower end of the rod with the aid of a nut welded to the bit. It is possible to drive the rod into the ground, in which case a number of small tubes or hoses for supplying liquid and grout have their outlets at various heights above the lower end of the rod.
- The invention also relates to a grouted anchor consisting of a solid or hollow rod which, at least at the lower end, is provided with a screw thread or helically arranged ridges.
- According to the invention, a drill bit is screwed onto the lower end of the rod.
- The element connecting the drill bit to the rod is preferably a nut.
- In the case of a drill bit which is simple to produce, said bit comprises one or more triangular plates which on one side are connected to the connecting element.
- A core rod can be fixed to the connecting element, such as the nut, and a propeller blade which has 0.2 to 5 screw turns and a minimum diameter which is greater than the diameter of the connecting element can be located around said core rod.
- The diameter of the propeller blade preferably tapers.
- It is also possible to arrange one or more small tubes along the anchor rod, said small tubes being fixed to the anchor rod and at least one of said tubes terminating in the vicinity of the lower end of the anchor rod or in the drill bit.
- Very long rods can be composed of sections which are coupled to one another by means of couplings.
- In order to supply the grout, a pipe can be arranged around the tension member, which pipe is fixed to the drill bit, for example by making slots in the lower end of the pipe, into which slots the top edge of the drill bit projects. The end section of the pipe intended for adhesion of grout will be roughened to provide better adhesion.
- In yet another variant, a small tube is arranged at least around the lowermost section of the tension member, which tube has its outlet in the vicinity of the drill bit, a pipe section enclosing the lower end of the tension member and said small tube over the length of the grout body to be introduced and a force-transmitting medium (for example grout) being introduced into the gap between the pipe section and the tension member.
- The upper end of said pipe section can be connected to a pipe arranged around the tension member. The closed lower end of said pipe can be connected to a union to which the small tube positioned in the gap between pipe section and tension member is connected.
- The invention will now be explained in more detail with reference to the figures.
- Figure 1 shows a perspective view of the lowermost section of a tension member to be introduced into the ground.
- Figures 2, 3 and 4 show a longitudinal section of the drilled hole in various stages of fitting of the grouted anchor.
- Figures 5 and 6 show views of two parts of a particular embodiment of a drill bit, which parts can be joined to one another.
- Figure 7 shows a perspective view of the lowermost section of one variant of a tension member to be introduced into the ground.
- Figure 8 shows a view of a tension anchor according to Figure 7, of substantial length.
- Figure 9 shows a view of the lowermost section of yet another variant of a tension member.
- The
tension member 1 shown in Figure 1 is made of high-grade steel onto whichridges 2 have been rolled which run in a helical pattern with respect to one another. Adrill bit 3 is composed of a triangular steel plate onto which anut 4 has been welded. Said nut is screwed onto the lower end of thetension member 1. Asmall tube 5 runs along theentire rod 1 and is fixed to the rod with the aid ofclamps 6 and has its outlet in the vicinity of thedrill bit 3. - Figure 2 shows the first stage of production, in which the
rod 1 is introduced into the ground by pushing and turning and, during this operation, water or bore flushing liquid is introduced into the hole via thetube 5. - In the stage shown in Figure 3, the rod has reached the desired depth and during the last part of drilling, instead of water, grout has been supplied via the
tube 5. Said grout is indicated by 7. The lowermost section of the rod with drill bit now extends into a firm layer of ground, such as a layer of sand. - The rod is then withdrawn from the ground over the desired length of the grout body (see section shown in broken lines in Figure 3) and grout under high pressure (greater than 15 bar, preferably about 20 bar) is then injected into the borehole via the
tube 5 and, at the same time, the lower end of the rod is pushed back down to the desired depth. - The grout under high pressure displaces ground around the bottom of the drilled hole and the
grout body 8 forms from grout and any soil (sand) mixed therewith, whichgrout body 8 is allowed to set. - It would be possible to introduce the rod, which can be solid or hollow, into the ground by driving, and there is a possibility of using five different tubes, which have their outlets at different heights above the lower end of the rod, instead of a single tube.
- A somewhat longer rod will be composed of sections which are coupled to one another by means of couplings.
- Diverse embodiments of the drill bit are possible. Figure 5 shows an essentially
triangular plate 10 which is welded to anut 11. Anincision 12 has been cut out at the lower end of the triangular plate and arectangular opening 13 has also been cut into the plate. Thetriangular plate 14 according to Figure 6 has an incision comprising atapering section 15, asection 16 which has a width smaller than the thickness of theplate 10 and asection 17 which has a width equal to the thickness of theplate 10. Twoprojections 18 protrude from the top surface of theplate 14. Said projections have a sloping face on the outside. - The
plate 14 is slid over theplate 10 into a position perpendicular to the plate 10 - as soon as thesection 16 of the incision in theplate 14 is opposite theopening 13 in theplate 10, theplate 14 is clicked home with respect to theplate 10, theprojections 18 protruding into thenut 11. The resulting union between theplates section 16 of the incision is somewhat smaller than the height of theopening 13, that is to say the walls of the taperingsection 15 end beneath the top edge of the opening 13. As a result, and as a consequence of the fact that the sloping faces of theprojections 18 lead to the opening 15 becoming narrower when they are slid with respect to the bottom inside rim of thenut 11, a firm clap joint is produced between theplates - In another possible embodiment, a core rod, around which a half to two turn(s) of a propeller blade are fixed, is welded to the
nut 4. The diameter of the propeller blade can taper. - Because the grout sets fairly rapidly, said grout is able to exert such great forces on the
tube 5, for example during introduction of the grout body, that saidtube 5, possibly havingclamps 6, is destroyed by torsion during rotation of thetension member 1. It is possible that the grout introduced already starts to set within a few minutes of its introduction. In order to prevent this problem as shown in Figures 7 and 8 and also to obtain better corrosion resistance of the tension member, apipe 19 can be arranged, instead of thetube 5, around thetension member 1, whichpipe 19 is able to withstand at least a pressure of 25 bar and is preferably made of plastic instead of metal. By makingslots 22 in the pipe, for example at the lower end of thepipe 19, in the vicinity of thedrill bit 3, so that thepipe 19 is fitted over a plate of thedrill bit 3, it is possible to transmit the moment of torsion, acting on thepipe 19 and caused by the setting grout, to the drill bit and thus to thetension member 1. Other methods are also possible for connecting thepipe 19 to thedrill bit 3 ortension member 1, so that thepipe 19 also turns as thetension member 1 rotates. - The
pipe 19 has an internal diameter such that sufficient gap remains between thepipe 19 and thenut 4 to allow the requisite liquid and/or grout to pass. - After the anchor has been prepared, grout is present between the
pipe 19 and thetension member 1, as a result of which thetension member 1 is also protected against corrosion, which is important in connection with the alkaline medium of the grout in which thetension member 1 is encased. - Preferably, grout of high quality is present between the
tension member 1 and thepipe 19 at the lower end of the anchor, in the area of the grout body. Towards the top, grout of lower to very low strength, or another anti-corrosion medium, which can also be a liquid, can be present in the gap between thetension member 1 and thepipe 19. - In this case, the
pipe 19 ensures that any aggressive medium present in the ground is not able to reach thetension member 1, or can do so only with difficulty. In order to obtain better adhesion of the grout to thepipe 19, both the inside and outside of thepipe 19 can be roughened in the region of the grout body to be formed. - As can be seen from Figure 8, if a tension anchor of this type is very long, for example longer than 8 metres, it is made up of
various tension members 1. The tension members are coupled to one another by means ofnut bushes 20, which are provided with a screw thread. When thepipe 19 is used around thetension member 1, said pipe also consists of various lengths which are connected to one another bycouplings 21. It is also pointed out that thepipe 19 is closed off at the top of the tension anchor during injection with grout or water. - Another embodiment is illustrated in Figure 9. The important feature is the fitting of a
pipe section 23, specifically over the length of the grout body in the vicinity of the lower section of the tension member. With this arrangement, thepipe section 23 is a smooth tube which optionally has been roughened or, for example, a ribbed tube made of plastic. Saidpipe section 23 encloses thetension member 1 and thetube 5 and has an internal diameter of a size such that thetube 5 can pass between thepipe section 23 and the nut. Before the anchor is used on site, grout or another force-transmitting medium is introduced under controlled conditions, for example in the factory, between thepipe section 23 and thetension member 1, over the section where the grout body is to be produced. Thetube 5 is fitted around thetension member 1 beforehand, optionally withclamps 6, at least for the section where grout has been introduced in the factory. After the grout has set, thetube 5 is embedded and firmly joined over said section to thetension member 1. Thepipe section 23 is now also firmly joined to thetension member 1 and can also terminate before or at thedrill bit 3. - During work on site it is possible that the
tube 5 is placed along theentire tension member 1, without a pipe being fitted around thetension member 1. It is also possible that atube 5 is fitted around theentire tension member 1 and that asmooth pipe 19 is positioned starting from thepipe section 23 in the manner shown in Figure 8, thepipe section 23 being connected to thepipe 19 by means of known connecting means. Another possibility is that thepipe 19 is closed at the bottom in the vicinity of thepipe section 23 and has a connector to which thetube 5, emerging from the gap between thepipe section 23 and thetension member 1, can be connected. Thepipe 19 can then be connected to thepipe section 23 in order to prevent rotation of thepipe 19 with respect to thetension member 1. In this case, during the injection of grout, grout first flows through the gap between thepipe 19 and thetension member 1 and then through thetube 5 to the injection locations in the vicinity of the drill bit or elsewhere at locations in thepipe section 23, which may or may not be ribbed. - In order to prevent penetration of soil, the ends of a
tube 5 orpipe 19 can be provided beforehand with screening or sealing means, which are dislodged, as soon as grout injection is started, by the high internal pressure then prevailing.
Claims (19)
- Method for fitting a grouted anchor for anchoring revetment walls, buildings, bank protection works, quay walls and the like and grouted anchor which can be used for carrying out this method, characterised by the following steps:- introducing into the ground a solid or hollow anchor rod made of high-grade steel,- via a cavity in the rod, a pipe fitted around the rod and/or one or more small tubes which are fixed to the outside of the rod and at least one of which terminates in the vicinity of the lower end of the rod, feeding liquid into the hole around the rod while the rod is introduced into the ground,- feeding grout via said rod cavity, pipe and/or small tubes as soon as the lower end of the rod has reached the desired level from the top of the grout body,- introducing grout under a pressure of at least 15 bar into the ground via said pipe, small tubes and/or cavity,- bringing the lower end of the rod to the desired depth while the grout is fed in under high pressure and- allowing the grout to set.
- Method according to Claim 1, characterised in that before introducing grout under a pressure of at least 15 bar into the ground, the lower end of the rod is brought to the desired depth while feeding in grout under normal pressure and the rod is then withdrawn from the ground over the desired length of the grout body.
- Method according to Claim 1 or 2, characterised in that the rod is provided with a drill bit at its lower end and can be introduced into the ground by pushing and turning.
- Method according to Claim 3, characterised in that the drill bit is provided with a propeller blade which has 0.2 to 5 screw turns.
- Method according to Claim 3 or 4, characterised in that the rod is provided with helically arranged ridges and the drill bit is screwed to the lower end of the rod with the aid of a nut welded to the bit.
- Method according to one of the preceding claims, characterised in that a number of small tubes for supplying liquid and grout have their outlets at various heights above the lower end of the rod.
- Method according to one of the preceding claims, characterised in that the rod consists of sections which are coupled to one another by means of couplings.
- Grouted anchor consisting of a solid or hollow rod which, at least at the lower end, is provided with a screw thread or helically arranged ridges, characterised in that a drill bit (3) is screwed onto the lower end of the rod.
- Grouted anchor according to Claim 8, characterised in that the connecting element between drill bit and rod is a nut (4).
- Grouted anchor according to Claim 8, characterised in that the drill bit comprises one or more triangular plates which on one side are connected to the connecting element.
- Grouted anchor according to Claim 8, characterised in that a core rod is fixed to the connecting element, and a propeller blade which has 0.2 to 5 screw turns and a minimum diameter which is greater than the diameter of the connecting element is located around said core rod.
- Grouted anchor according to Claim 11, characterised in that the diameter of the propeller blade tapers.
- Grouted anchor according to one of Claims 8 to 12, characterised in that one or more small tubes (5) are arranged along the anchor rod (1), said small tubes (5) being fixed to the anchor rod and at least one of said tubes terminating in the vicinity of the lower end of the anchor rod or in the drill bit (3).
- Grouted anchor according to one of Claims 8 - 12, characterised in that a pipe (19) is arranged around the tension member (1), which pipe is fixed to the drill bit (3).
- Grouted anchor according to Claim 14, characterised in that slots (22) are made in the lower end of the pipe, into which slots the top edge of the drill bit (3) projects.
- Grouted anchor according to either of Claims 14 or 15, characterised in that the end section of the pipe (19) intended for adhesion of grout is roughened.
- Grouted anchor according to Claim 16, characterised in that a small tube (5) is arranged at least around the lowermost section of the tension member (1), which tube (5) has its outlet in the vicinity of the drill bit, in that a pipe section (23) encloses the lower end of the tension member (1) and said small tube (5) over the length of the grout body to be introduced and in that a force-transmitting medium is introduced into the gap between the pipe section (23) and the tension member (1).
- Grouted anchor according to Claim 17, characterised in that the upper end of said pipe section (23) is connected to a pipe (19) arranged around the tension member.
- Grouted anchor according to Claim 18, characterised in that the closed lower end of the pipe (19) is connected to a union to which the small tube (5) positioned in the gap between pipe section and tension member is connected.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9400121 | 1994-01-27 | ||
NL9400121A NL9400121A (en) | 1994-01-27 | 1994-01-27 | A method for applying a grout anchor for anchoring earth-retaining walls, structures, bank protection, quay walls and the like, and grout anchor that can be used for carrying out this method. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0665337A1 true EP0665337A1 (en) | 1995-08-02 |
EP0665337B1 EP0665337B1 (en) | 2000-07-19 |
Family
ID=19863747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19950200183 Expired - Lifetime EP0665337B1 (en) | 1994-01-27 | 1995-01-26 | Method for fitting a grouted anchor for anchoring revetment walls, buildings, bank protection works, quay walls and the like |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0665337B1 (en) |
DE (1) | DE69518020D1 (en) |
NL (1) | NL9400121A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0863261A1 (en) * | 1997-03-04 | 1998-09-09 | Foresight Products, LLC | Ground anchor assembly and method for installing same |
CN104563899A (en) * | 2015-01-08 | 2015-04-29 | 赵津梁 | Continuous drill pipe under pressure, swing-jet grouting device using drill pipe and swing-jet grouting construction method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3815368A (en) * | 1973-07-19 | 1974-06-11 | L Turzillo | Method for installing concrete anchor piles in situ |
DE2431113A1 (en) * | 1974-06-28 | 1976-01-15 | Takechi Komusho Kk | Ground anchor for retaining wall support - is inserted by boring tool with expanding cutters and can be removed |
US3999391A (en) * | 1975-06-12 | 1976-12-28 | Meredith Drilling Co., Inc. | Tie-back anchor components and method for a shoring system |
EP0413676A1 (en) * | 1989-08-14 | 1991-02-20 | Smet-Boring N.V. | Process for fixing anchors |
WO1991015656A1 (en) * | 1990-04-11 | 1991-10-17 | Bergwerksverband Gmbh | Injection bore anchor with conveyor screw |
EP0539630A1 (en) * | 1991-10-31 | 1993-05-05 | Beheersmaatschappij Verstraeten B.V. | Method of providing a foundation pile with enlarged base in the ground |
-
1994
- 1994-01-27 NL NL9400121A patent/NL9400121A/en not_active Application Discontinuation
-
1995
- 1995-01-26 EP EP19950200183 patent/EP0665337B1/en not_active Expired - Lifetime
- 1995-01-26 DE DE69518020T patent/DE69518020D1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3815368A (en) * | 1973-07-19 | 1974-06-11 | L Turzillo | Method for installing concrete anchor piles in situ |
DE2431113A1 (en) * | 1974-06-28 | 1976-01-15 | Takechi Komusho Kk | Ground anchor for retaining wall support - is inserted by boring tool with expanding cutters and can be removed |
US3999391A (en) * | 1975-06-12 | 1976-12-28 | Meredith Drilling Co., Inc. | Tie-back anchor components and method for a shoring system |
EP0413676A1 (en) * | 1989-08-14 | 1991-02-20 | Smet-Boring N.V. | Process for fixing anchors |
WO1991015656A1 (en) * | 1990-04-11 | 1991-10-17 | Bergwerksverband Gmbh | Injection bore anchor with conveyor screw |
EP0539630A1 (en) * | 1991-10-31 | 1993-05-05 | Beheersmaatschappij Verstraeten B.V. | Method of providing a foundation pile with enlarged base in the ground |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0863261A1 (en) * | 1997-03-04 | 1998-09-09 | Foresight Products, LLC | Ground anchor assembly and method for installing same |
CN104563899A (en) * | 2015-01-08 | 2015-04-29 | 赵津梁 | Continuous drill pipe under pressure, swing-jet grouting device using drill pipe and swing-jet grouting construction method |
CN104563899B (en) * | 2015-01-08 | 2017-09-12 | 赵津梁 | Drilling rod and the pendulum spray apparatus and pendulum spraying construction method using the drilling rod with pressure of continuing |
Also Published As
Publication number | Publication date |
---|---|
NL9400121A (en) | 1995-09-01 |
DE69518020D1 (en) | 2000-08-24 |
EP0665337B1 (en) | 2000-07-19 |
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