EP1664463A1 - System zur befestigung eines objekts im boden mittels eines bolzens - Google Patents
System zur befestigung eines objekts im boden mittels eines bolzensInfo
- Publication number
- EP1664463A1 EP1664463A1 EP04787228A EP04787228A EP1664463A1 EP 1664463 A1 EP1664463 A1 EP 1664463A1 EP 04787228 A EP04787228 A EP 04787228A EP 04787228 A EP04787228 A EP 04787228A EP 1664463 A1 EP1664463 A1 EP 1664463A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- claws
- stake
- anchoring
- support rod
- 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
Links
Classifications
-
- 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
-
- 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
- E02D5/805—Ground anchors with deformable anchoring members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
- E04H12/2207—Sockets or holders for poles or posts not used
- E04H12/2215—Sockets or holders for poles or posts not used driven into the ground
- E04H12/223—Sockets or holders for poles or posts not used driven into the ground with movable anchoring elements; with separately driven anchor rods
Definitions
- the present invention relates to a system for anchoring an object in the ground using a stake, serving in particular for anchoring marker posts, such as those used by surveyors, of posts of all kinds , in particular fence posts, support posts for traffic signs.
- a stake serving in particular for anchoring marker posts, such as those used by surveyors, of posts of all kinds , in particular fence posts, support posts for traffic signs.
- Anchor stakes for marker posts have been known for a long time in numerous variants. These stakes must maintain land markers for several decades reliably despite the various attacks that this type of object can undergo, such as ground movements, the passage of agricultural vehicles or livestock. Many solutions have already been proposed to increase the pullout resistance of these stakes. They can be broadly grouped into two classes. The first class of stakes uses a fixed geometry anchoring system. Document US Pat. No. 4,738,760 presents such a stake for anchoring a permanent marker of an object buried in the ground to the ground.
- the stake comprises a long body terminated at a first end by a striking head and at a second end by a plurality of slightly curved elastic fins, arranged radially and directed towards the outside of the stake in the direction opposite to the point so as to form a harpoon.
- the elastic fins fold back along the body under the thrust of the soil displaced by the penetration of the stake. If the post is subsequently pulled, the elastic fins deploy because their part slightly bent tends to come to anchor in the surrounding soil under the effect of the elastic return force of the elastic fins.
- these harpoons are of limited effectiveness, especially depending on the nature of the soil.
- the second class of stakes provides deployable elements.
- a stake has a longitudinal body of tubular section containing deployable elements. The stake is previously driven into the ground, then it receives inside its tubular section a long rod terminated by a mandrel. This rod comes to rest on the deployable elements and forces them to come out of the body of the stake through guide holes when the mandrel undergoes a substantially axial thrust.
- WO 01/42569 shows in Figs. 17 and 18 an anchor stake comprising a tube with two deployable blades as anchoring elements.
- These blades are mounted with one end on a nut which is axially movable inside the tube. Their free end passes through a slot in the side wall of the tube.
- a bolt engages the nut in the tube and rests with its head on a closed head of the tube. After pressing the anchor stake in the ground, turn the bolt so as to reassemble the nut, which forces the anchor blades to penetrate through the slots in the ground, extending upwards at an angle along the tube.
- this anchor stake has the advantage of offering improved resistance to tearing.
- the head of the bolt which projects from the closed head of the tube, is very troublesome when driving the anchor stake into the ground. Figs.
- This anchor stake comprises a tube and a U-shaped body serving as an anchoring element.
- a threaded rod with a special head serves as a tool for positioning the anchor.
- the tube is sunk into the ground without the anchor.
- the U-shaped body is then mounted on the threaded rod.
- a transverse head of the threaded rod is passed through a slot in the base of the U-shaped body and the threaded rod is rotated by 90 °.
- the threaded rod is pushed into the tube until its lateral arms engage channels arranged in the side wall of the tube.
- a nut screwed onto the threaded rod pushes the U-shaped body into the tube.
- traction is exerted on the threaded rod, either using a lever or using a clamping nut which is lowered on a spacer. This traction forces the side arms of the U-shaped body to penetrate the ground through the channels in the side wall of the tube.
- the threaded rod is turned 90 ° to pass its head through the slot in the base of the U-shaped body and to be able to remove the threaded rod from the tube. It will be noted that the operation of subsequent positioning of the U-shaped anchoring body in the tube is very delicate.
- WO 01/42569 are designed to serve as a permanent anchor for poles. Once anchored in the ground, they remain in principle in place. However, for certain applications, in particular for the fixing of marking terminals, it is important also that one can easily recover the anchor stake if it is no longer used.
- An objective of the present invention is to provide a system for anchoring an object in the ground using an anchor stake offering good resistance to tearing, which allows easy installation of the anchor stake and easy recovery of the latter if it is no longer used.
- a system for anchoring an object in the ground comprises at least one stake. anchor and an actuating mechanism.
- the anchor stake comprises a tube and at least two deformable anchor claws mounted on a claw support which is axially displaceable inside the tube.
- the tube has a tube wall, a driving point and a head.
- the anchoring claws are mounted with one end on the claw support, so that an axial traction exerted on the claw support in the direction opposite to said driving direction causes the claws to exit the tube through openings in the tube wall.
- These openings have a geometry such that they cause deployment of the anchoring claws at an angle along said tube in the direction of traction.
- the actuation mechanism is a threaded rod mechanism.
- a stake for anchoring the system according to the invention further comprises the following characteristics.
- the claw support comprises a central support rod which is coaxial with the tube, axially guided and locked in rotation in the tube. The claws are carried by the lower end of this central support rod on the side of the driving point. On the side of the tube head, a coupling means equips the upper end of the rod support center.
- the threaded rod actuation mechanism comprises a nut capable of bearing on the tube head and a threaded rod, on which said nut is screwed, and the lower end of which comprises a coupling means able to cooperate with the means coupling the upper end of the central support rod to transmit said axial traction to the latter when said nut is rotated in a first direction.
- the claws can deploy in an environment which has not been weakened by the insertion of the stake.
- the insertion of the stake locally compacted the medium around the stake.
- This compacted environment offers a very good grip for anchoring the claws.
- the actuation mechanism can be coupled to the central claw support rod. To this end, it suffices to couple the lower end of the threaded rod to the upper end of the central claw support rod. This is a very easy operation because the coupling is done near the head of the tube.
- the nut is then turned to bear against the head of the tube in said first direction, which brings up the central claw support rod.
- the actuating mechanism can be removed and used to anchor other stakes. Reusing the actuation mechanism naturally reduces system costs. It will also be appreciated that the recovery of a stake anchored in the ground is also very easy.
- an actuation mechanism which further comprises a locking means connectable to the tube head of so as to form a counter-support for the nut when the latter is turned in a second direction opposite to the first, thereby causing a translation of said threaded rod towards the inside of the tube and making said claws enter the tube.
- the locking means is advantageously an element which can be removably connected to the tube head.
- the actuation nut comprises a base
- the tube head comprises a collar
- the locking means is a jumper which is placed astride the base and the collar.
- the coupling means advantageously form a coupling with a helical connection or with a bayonet connection. These are couplings which allow rapid coupling and decoupling and which do not require much space, that is to say that they do not lead to an increase in the section of the tube.
- the anchor claws are preferably deformable rods which, when compared to anchor blades, take up less space in the retracted position and ensure better penetration into the ground.
- the tube has a square section
- the central support rod has a round section
- the anchor claws are deformable rods of round section which are arranged in the four corners of the square section tube and which pass through openings arranged in the corners of the wall of the tube.
- the tube wall includes openings through which the claws come out at different heights. In this way, the anchor claws deploy in the ground at different depths. In the case of very heterogeneous density terrain, this increases the chances of being able to deploy certain claws in a mechanically stable area.
- the anchoring claws are also advantageously carried by a plate fixed to the lower end of the central support rod and have different lengths.
- axial guidance of the lower and upper end of the central support rod in the tube is indeed essential to avoid deformation of the claws when, to retract the claws, one strikes the upper end of the central claw support rod.
- advantageously arranged on the side of the tube head means for compressing the soil around the tube.
- Such soil compression means comprise for example a body in the form of an inverted cone or an inverted pyramid, this body being traversed axially by the tube.
- Such a soil compression body is advantageously formed of two half-bodies assembled around the tube along a plane which passes through the axis of the tube.
- the soil compression means can also comprise at least two T-sections which extend at an angle along the upper part of the tube so as to form a "V".
- the means for implementing the anchor stake advantageously comprise a mandrel provided with a shoulder capable of bearing on a collar surrounding the head tube to push the tube into the ground, and a central rod with a flexible end capable of taking press on the upper end of the central claw support rod in the tube to push the latter into the tube and thus retract the claws. It will be appreciated that a system according to the invention is particularly suitable for anchoring an identification terminal in the ground.
- FIG. 1 a schematic view in vertical section of a stake alone after it has been driven into the ground;
- FIG. 2 a schematic view in vertical section of a stake after installation of a device used for the deployment of the anchoring claws
- FIG. 3 a schematic view in vertical section of a stake showing the deployment of the anchoring claws
- FIG. 4 a schematic view in vertical section of a stake after its final anchoring
- FIG. 5 a schematic view in vertical section of a stake after installation of a device used for the retraction of the anchoring system
- FIG. 6 a schematic view in vertical section of a stake showing the retraction of the anchoring claws
- FIG. 7 a schematic top view of a stake.
- FIG. 8 a schematic view in vertical section of a stake when it is driven into the ground using a special mandrel
- FIG. 9 a schematic view in vertical section of a stake during the retraction of the claws using the special mandrel of FIG. 8;
- FIG. 10 a schematic view in partial section showing the attachment of a bollard or beacon using an anchor stake comprising a soil compression cone;
- FIG. 11 a section through the soil compression cone
- FIG. 12 a schematic view in vertical section showing an anchor stake equipped with soil compression profiles
- FIG. 13 a horizontal section of the anchor stake of FIG. 12.
- FIG. 1 illustrates a preferred embodiment of a stake 10 according to the invention, the stake 10 being driven into a medium 12, for example a ground.
- the stake 10 comprises a tube 14 having at a first end a point 16 and being open at its other end 18.
- the end 18 of the tube 14 is provided with a head plate 22 (also called tube head) forming a collar .
- the tube 14 has, in the embodiment shown, a square section.
- a central support rod 24 is disposed inside the tube 14. This central support rod 24 is provided with a plurality of anchoring claws 28 integral with their lower part of the central rod 24.
- the anchoring claws 28 are preferably made of flexible steel, but can be of any other material allowing plastic or elastic deformation of the claws without breaking during of their deployment.
- the tube 14 comprises in its side wall 26 a plurality of openings 30. These receive the curved upper ends 32 of the anchoring claws 28 which, before deployment, do not protrude from the side wall 26 of the tube 14 and which are fully housed in tube 14. It will be noticed that the curved upper ends 32 and the openings 30 are spaced not only circumferentially around the tube 14 but also axially along the tube 14.
- the axial distribution of the points of penetration of the claws 28 into the ground increases the chances of good anchoring in overcoming any heterogeneity of the medium 12 if it were to present more or less loose areas at different depths.
- the number of openings 30 and anchoring claws 28 can be chosen according to the nature of the medium 12 or the load which the present invention will have to face.
- the first phase of implementation of the stake 10 consists in driving it using a suitable tool, such as a hammer or a heavy hammer, into the ground 12.
- FIG. 1 shows the stake 10 after this first phase.
- Fig. 2 illustrates the second phase of implementation of the stake 10: the installation of a removable actuation mechanism 33.
- the actuation mechanism 33 fits on the head 22 of the tube 14 and comprises a threaded rod 36 and a nut 40.
- This mechanism is installed in practice in the following manner. Through an opening 34 in the head plate 22 is introduced the threaded rod 36 on which the nut 40 is screwed.
- the lower end 42 of the threaded rod 36 has a threaded bore 44 and is screwed on a threaded end 44 'of the central support rod 24, so as to obtain a connection making it possible to transmit a tensile force on the central support rod 24.
- a possible variant to a helical connection between two threads is for example a bayonet coupling. Other coupling variants are not however excluded. Referring to FIG.
- the central rod 24 is locked in rotation in the tube 14 using a square plate 45 adjusted in square section of the tube 14.
- This plate 45 also serves as an axial guide for the central support rod 24 in the tube 14. If the tube 14 had a circular section, it would be necessary, for example, to provide inside the tube 14 an axial guide which prevents the rotation of the plate 45.
- the central support rod 24 has a round section and that the anchoring claws 28 are deformable rods of round section which are arranged in the four corners of the tube 14 with a square section and which pass through openings arranged in the corners of the wall 26 of the tube 14.
- This arrangement makes it possible to work with a tube of reduced section while ensuring smooth deployment of the deployment, respectively of the retraction of the claws 28.
- the nut 40 is turned to bear on the head plate 22 using a wrench in the direction of the arrow 49. Indeed, as the central support rod 24 is locked in rotation in the tube 14, the rotation in the direction of the arrow 47 of the nut 40 bearing on the head plate 22 causes a translation of the central rod support 24 in the direction of arrow 47, provided of course that the threads of the nut 40 and the threaded rod 36 have a pitch to the right.
- the anchoring claws 28 are pushed through the openings 30 of the tube 14, to penetrate into the adjacent terrain 12.
- the lower and upper edges of the openings 30 are bevelled so that the anchoring claws 28 are guided, starting with the curved upper ends 32, at an angle along the tube 14 in the direction of the arrow 47, this is ie in the direction of traction.
- the trajectory of the anchoring claws 28 is determined on the one hand by the geometry of the openings 30, and on the other hand, by the resistance to penetration opposed by the medium 12. It will be appreciated that after deployment of the claws 28, the stake 10 is found firmly anchored in the ground 12 in the manner of a harpoon.
- FIG. 4 shows the stake 10 anchored in the ground.
- the threaded rod 36 has been unscrewed from the central support rod 24 and removed together with the nut 40.
- FIG. 5 illustrates the first phase of recovery of the stake 10.
- the rod threaded 36 is again screwed onto the threaded end 44 ′ of the central support rod 24, in the same way as during the anchoring phase of the stake 10.
- the nut 40 is brought closer to the head plate 22 of the tube 14.
- a jumper 50 is placed astride the head plate 22 of the tube 14 and on a base plate 51 of the nut 40.
- One leg of the jumper 50 is supported on the underside of the plate head 22 and the other leg forms a counter-support for the upper face of the base plate 51 of the nut 40.
- the nut 40 is then turned using a wrench so as to obtain the penetration inside the tube 14 of the threaded rod 36.
- the central support rod 24 is also translated in the direction of the tip 16 of the tube 14. In so doing, it forces the anchoring claws 28 to enter by the openings 30 of the tube 14.
- the ec rou 40 rests on the upper leg of the rider 50, which transmits the reaction of this force to the head plate 22 of the tube 14.
- FIG. 6 shows the anchoring claws 28 fully retracted inside the tube 14 following the adequate rotation of the nut 40 in the direction of the arrow 49 '.
- the bevelled edges of the openings 30 facilitate the retraction of the anchoring claws 28 and prevent them from breaking, so that the stake 10 can be reused after its extraction from the ground 12.
- FIG. 8 illustrates the insertion of an anchor stake 10 into the ground using a special mandrel 100.
- This special mandrel 100 comprises a shoulder 102 bearing on the head plate 22 of the tube 14 and a central rod 104. The latter enters the tube 14 to center the mandrel 100 on the tube 14. It will be noted that in FIG. 8, the end 106 of the central rod 104 is spaced from the upper end of the central support rod 24.
- FIG. 10 shows the fixing of a terminal head 110 using an anchor stake 10.
- the terminal head 110 made for example of concrete, is provided with a central channel through which the tube 14 passes.
- the anchor stake 10 of FIG. 10 further comprises a soil compression body 120 made of plastic ensuring greater stability of the anchoring point in the soil.
- This body has the shape of an inverted cone or an inverted pyramid provided with a central channel for the passage of the tube 14.
- the soil compression body 120 is formed by two half-bodies 120 ′, 120 "which are assembled in a central plane around the tube 14.
- T-sections 130 which extend at an angle along the upper part of the tube 14 towards the upper end thereof, so as to form a "V" in two orthogonal planes.
- These T-sections 130 also fulfill the role of soil compression means at the upper end of the tube 14, in order to ensure better stability of the anchor point in the soil.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Piles And Underground Anchors (AREA)
- Revetment (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04787228A EP1664463B1 (de) | 2003-09-26 | 2004-09-27 | System zur Verankerung eines Objekts im Bodem mittels eines Pfahls |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03103579A EP1518976A1 (de) | 2003-09-26 | 2003-09-26 | Pfahl mit herausragenden Widerhaken |
EP04787228A EP1664463B1 (de) | 2003-09-26 | 2004-09-27 | System zur Verankerung eines Objekts im Bodem mittels eines Pfahls |
PCT/EP2004/052330 WO2005031091A1 (fr) | 2003-09-26 | 2004-09-27 | System pour l’ancrage d’un objet dans le sol a l’aide d’un piquet |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1664463A1 true EP1664463A1 (de) | 2006-06-07 |
EP1664463B1 EP1664463B1 (de) | 2007-02-07 |
Family
ID=34178600
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03103579A Withdrawn EP1518976A1 (de) | 2003-09-26 | 2003-09-26 | Pfahl mit herausragenden Widerhaken |
EP04787228A Not-in-force EP1664463B1 (de) | 2003-09-26 | 2004-09-27 | System zur Verankerung eines Objekts im Bodem mittels eines Pfahls |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03103579A Withdrawn EP1518976A1 (de) | 2003-09-26 | 2003-09-26 | Pfahl mit herausragenden Widerhaken |
Country Status (8)
Country | Link |
---|---|
US (1) | US7497053B2 (de) |
EP (2) | EP1518976A1 (de) |
CN (1) | CN100445510C (de) |
AT (1) | ATE353389T1 (de) |
CA (1) | CA2537538C (de) |
DE (1) | DE602004004667T2 (de) |
ES (1) | ES2281837T3 (de) |
WO (1) | WO2005031091A1 (de) |
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CN113668523B (zh) * | 2021-08-30 | 2023-02-03 | 中国建筑第八工程局有限公司 | 适用于岩土工程的爪锚型锚杆及其施工方法 |
CN114482111B (zh) * | 2022-03-31 | 2024-02-02 | 安徽开盛津城建设有限公司 | 一种加固型建筑桩基 |
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-
2003
- 2003-09-26 EP EP03103579A patent/EP1518976A1/de not_active Withdrawn
-
2004
- 2004-09-27 DE DE602004004667T patent/DE602004004667T2/de active Active
- 2004-09-27 CA CA2537538A patent/CA2537538C/fr not_active Expired - Fee Related
- 2004-09-27 ES ES04787228T patent/ES2281837T3/es active Active
- 2004-09-27 EP EP04787228A patent/EP1664463B1/de not_active Not-in-force
- 2004-09-27 AT AT04787228T patent/ATE353389T1/de not_active IP Right Cessation
- 2004-09-27 WO PCT/EP2004/052330 patent/WO2005031091A1/fr active IP Right Grant
- 2004-09-27 CN CNB200480027058XA patent/CN100445510C/zh not_active Expired - Fee Related
- 2004-09-27 US US10/573,638 patent/US7497053B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
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See references of WO2005031091A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE602004004667D1 (de) | 2007-03-22 |
CA2537538A1 (fr) | 2005-04-07 |
CN100445510C (zh) | 2008-12-24 |
CN1853021A (zh) | 2006-10-25 |
US20070017166A1 (en) | 2007-01-25 |
EP1518976A1 (de) | 2005-03-30 |
ES2281837T3 (es) | 2007-10-01 |
DE602004004667T2 (de) | 2007-11-08 |
ATE353389T1 (de) | 2007-02-15 |
EP1664463B1 (de) | 2007-02-07 |
WO2005031091A1 (fr) | 2005-04-07 |
CA2537538C (fr) | 2012-07-10 |
US7497053B2 (en) | 2009-03-03 |
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