EP2829661A1 - Ancrage de terre ou de rocher - Google Patents

Ancrage de terre ou de rocher Download PDF

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Publication number
EP2829661A1
EP2829661A1 EP13177343.4A EP13177343A EP2829661A1 EP 2829661 A1 EP2829661 A1 EP 2829661A1 EP 13177343 A EP13177343 A EP 13177343A EP 2829661 A1 EP2829661 A1 EP 2829661A1
Authority
EP
European Patent Office
Prior art keywords
tension element
anchoring part
soil
rock anchor
rock
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
Application number
EP13177343.4A
Other languages
German (de)
English (en)
Other versions
EP2829661B1 (fr
Inventor
Thomas Keller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FJ Aschwanden AG
Original Assignee
FJ Aschwanden AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FJ Aschwanden AG filed Critical FJ Aschwanden AG
Priority to EP13177343.4A priority Critical patent/EP2829661B1/fr
Priority to US14/331,756 priority patent/US9488048B2/en
Priority to JP2014146840A priority patent/JP2015021383A/ja
Priority to CA2857324A priority patent/CA2857324C/fr
Publication of EP2829661A1 publication Critical patent/EP2829661A1/fr
Application granted granted Critical
Publication of EP2829661B1 publication Critical patent/EP2829661B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
    • 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
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material

Definitions

  • the present invention relates to an earth anchor and rock anchor, comprising a longitudinally stable flexible tension member, an anchoring part, in which the tension member is fixed to the one end portion, and an anchor head means, in which the tension member is held with the other end portion, which anchoring part thereto is intended to be introduced into an earth or rock hole and anchored there.
  • Such earth and rock anchors are used in particular to stabilize slopes and rock walls by the forces to be absorbed by the anchoring part in the surface region of the earth and rock masses to be stabilized are introduced into deeper stable soil layers.
  • a tension element which is usually formed of a rod or wire strands, which are anchored in the deeper soil layers.
  • these rods or strands are fixed via a mortar mass initiated in the corresponding wellbore.
  • the tensioning element can be tensioned via the anchor head device, and the surface soil or masses of rock can be stabilized by means of an anchoring plate on which a longarine is supported.
  • the tension element can be used in a plastic sheath, the tension elements can also be accommodated in plastic pipes, which are filled with grease, for example.
  • the object of the present invention is now to provide an earth anchor and rock anchor, which is easy to manufacture, and in which in particular the anchoring in the well and also on the anchoring part can be done in an optimal manner.
  • the solution of this object is achieved in that the longitudinally stable flexible tension member at least at one end portion which is fixed in the anchoring part, at least one first loop, and that the anchoring part is a substantially prismatic or cylindrical longitudinal body, which is formed by a curable composition of which the at least one first loop of the longitudinally stable flexible tension element is enclosed.
  • the anchoring part with at least one first loop of the longitudinally stable flexible tension element fixed therein is prefabricated, so that it is ensured that the fixation of this loop in the anchoring part is optimal.
  • This longitudinal body formed of a hardenable mass with the fixed tension element is inserted into the borehole, by initiating a further hardenable mass in the borehole, the longitudinal body is anchored and held in an optimal manner in the borehole bottom.
  • the longitudinally stable flexible tension element is formed of a fiber-reinforced plastic, preferably carbon fiber reinforced plastic, whereby corrosion can be excluded.
  • a tension element also has the advantage that it is flexible, the flexible tension element can be rolled up, for example, for transporting the earth and rock anchors, which has a space saving the length expansion of such rock anchors result. Due to the possibility of rolling up or bending over the longitudinally stable flexible tension element, the space required in front of the borehole during insertion of the ground anchor and rock anchor is low.
  • the longitudinally stable flexible tension element consists of several layers, wherein in one end region, which is fixed in the anchoring part, each layer or a bundle of layers each forms a separate first loop, which separate first loops each have different lengths. This results in a gradual fixation of this tension element in the anchoring part, whereby the anchoring and the power consumption is substantially improved.
  • a further advantageous embodiment of the invention is that the hardenable mass, from which the anchoring part is formed, is a mortar-like mass.
  • This mortar-like mass can be poured into a mold in which the one end portion of the flexible tension element is inserted, whereby a firm connection between mortar-like mass after curing and the first loops of the flexible tension element is ensured.
  • the surface of the anchoring part is provided with structures which can be provided in the mold in which the anchoring part is made and in which the first loops are molded, whereby between the surface of the anchoring part and the hardenable mass initiated in the borehole an optimal connection is created.
  • the structures consist of ribs projecting over the surface of the anchoring part, which are aligned substantially transversely to the direction of pull of the force acting on the tensioning element and on the anchoring part, which results in optimum fixation.
  • a further advantageous embodiment of the invention is that the anchoring part is enclosed at least over portions of its length with clamping rings. By means of these clamping rings it is avoided that the longitudinal body hardened from a mortar-like mass can break out in these areas.
  • a clamping ring is arranged in the entry region of the tension element in the anchoring part, since in this area the power consumption is very large.
  • these clamping rings are each arranged in the region of the ends of the first loops of the tension element in the anchoring part, since in these areas the risk of breakout is greatest.
  • a further advantageous embodiment of the invention is that the other end region of the tension element is designed as a second loop.
  • the tension element can thus be produced as an endless loop, which has a positive effect on their strength.
  • a bolt arranged transversely to the direction of pull is provided in the anchor head device, the second loop of the tension element can be laid in a simple manner via this bolt, the holding of the tension element in the anchor head device is optimal.
  • the bolt is mounted in a tensioning device which is arranged in the anchor head device, whereby the tension element can be clamped more or less simply by displacing the bolt.
  • FIG. 1 is a longitudinally stable flexible tension element 1 with the anchoring part 2 of a Erd- and rock anchor 3 can be seen.
  • the one end region 4 of this tension element 1 is fixed in the anchoring part 2.
  • the anchoring part 2 consists of a hardenable mass, in particular a mortar-like mass, the connection between anchoring part 2 and tension element 1 is achieved in that one end portion 4 of the tension element 1 is inserted into a mold or form, which form or formwork by the hardenable mass is poured out. After hardening of this mass, the mold or shell can be removed to obtain an anchoring part 2, in which the one end portion 4 of the tension element is optimally fixed and held.
  • This anchoring part 2 is formed in the present embodiment by a longitudinal body 8, which has a cylindrical shape.
  • this longitudinal body 8 a prismatic or another suitable shape.
  • the one end portion 4 of the tension element 1 is formed as a first loop 5; as will be described later, the tension member 1 may have a plurality of first loops 5.
  • the other end portion 6 of the tension member 1 is formed as a second loop 7, which can be secured in an anchor head device, not shown, as will be described later.
  • FIG. 2 the longitudinal stable flexible tension element 1 is shown.
  • This tension element 1 is formed from a fiber-reinforced plastic, preferably from a carbon fiber reinforced plastic, but also glass fiber reinforced plastics or other suitable reinforced Kunsscher are conceivable.
  • a fiber-reinforced plastic preferably from a carbon fiber reinforced plastic, but also glass fiber reinforced plastics or other suitable reinforced Kunsscher are conceivable.
  • several layers of carbon fiber reinforced plastic can be used, each of these layers or a bundle of layers forms an endless loop.
  • the innermost layer or bundle of layers forms the first loop 5 '
  • the second or middle layer or bundle of layers forms the first loop 5 "
  • the outermost layer or bundle of layers forms the first loop 5"'
  • this three first loops 5 ', 5 "and 5"' have different lengths.
  • all these layers are formed on one another, so that a single second loop 7 is formed.
  • the tension element 1 In the middle region of the tension element 1, all layers which form the loops are arranged one above the other, each of these layers forming a band, in the middle region 9 the tension element 1 thus consists of several superimposed bands. These bands can be laminated over the entire length, they can also be laminated only in areas alternately. Of course, a different number of layers and loops can be selected, depending on the type of use of earth and rock anchors. The layers can also be arranged one above the other and / or next to each other, so that juxtaposed loops of different lengths are conceivable. Large lengths of loops may additionally be provided with constrictions.
  • FIG. 4 shows the first loops 5 ', 5 "and 5"', as they are incorporated in the cured mass forming the longitudinal body 8.
  • an optimal fixation in the longitudinal body 8 is obtained, which is formed by the mortar-like mass.
  • a known, high-strength mortar-like mass is used. This mortar-like mass can be added to their additional reinforcement in a known manner or fiber material.
  • the surface 10 of the longitudinal body 8 forming the anchoring part 2 is provided with structures 11 projecting over the surface 10.
  • these structures 11 are formed as ribs 12, which are aligned substantially transversely to the pulling direction of the force acting on the tension element 1, and for example, as a spirally encircling ribs 12 may be formed.
  • These structures 11 or ribs 12 are incorporated into the surface of the casting mold, while the longitudinal body 8 is produced by the casting process, they are imaged on the surface 10 of the longitudinal body.
  • the longitudinal body 8 is enclosed in each case with a clamping ring 13, as will be described in detail later.
  • These clamping rings 13 are used to reinforce the longitudinal body 8 in particular in the inlet region of the tension element 1 in the anchoring part 2 and in the region of the first loops 5 ', 5 "and 5"'. In these areas, the risk of breaking out of the mortar-like mass is thereby minimized when loading the earth and rock anchors.
  • FIG. 5 is a cross section through the longitudinal body 8, which forms the anchoring part 2, can be seen.
  • longitudinal body 8 In this consisting of the mortar mass longitudinal body 8 is a first loop 5 'or 5 "or 5"' embedded.
  • a clamping ring 13 To the longitudinal body 8 is in the region of the loop ends, as previously described, in each case a clamping ring 13 is inserted.
  • This Clamping ring 13, which may also consist of a carbon fiber reinforced plastic surrounds the longitudinal body 8 in the region of the first loops 5 ', 5 "and 5"', in these areas the breaking of the mortar-like mass is suppressed, which serves to reinforce the anchoring part 2.
  • Out FIG. 5 are also the ribs 12 can be seen, which are above the surface 10 of the longitudinal body 8 above.
  • the earth anchor and rock anchor 3 according to the invention can be seen in the condition used in the substrate 14 to be stabilized.
  • the one end portion 4 is introduced with the anchoring part 2 of the tension element 1 in a mounted in the ground 14 bore 15.
  • insertion aids can be used in a known manner, such as rods for inserting the longitudinal body 8 in the bore 15.
  • the other end portion 6 of the earth and rock anchor 3, which is designed as a second loop 7, is fastened in an anchor head device 16 which, as will be seen later, is designed as a tensioning device.
  • an earth and rock anchor 3 used can have lengths of up to 70 meters or more. With such lengths, it may be appropriate to subdivide the tension element 1 into several sections and to connect them via coupling means, which simplifies handling.
  • the longitudinal body 8 can easily have a length of 6 meters, whereby an optimal anchoring in the bore 15 of the substrate to be stabilized 14 can be achieved.
  • FIG. 8 Out FIG. 8 is the anchor head device 16 can be seen, with which the other end portion 6 of the tension element 1 of the earth and rock anchor 3 is held.
  • the anchor head device 16 consists of a mounting bracket 17 which is provided with two longitudinal slots 18. Inserted in these longitudinal slots 18 is a bolt 19. About this pin 19 is the second loop. 7 of the tension element 1 placed.
  • the bolt 19 can be tensioned together with the second loop 7 of the tension element 1 in the direction of the longitudinal slots 18.
  • clamping screws 20 are provided, which are screwed into the bolt 19, and which are supported on the support bracket 17. As a result, the tension element 1 can be clamped in a simple manner to the desired clamping force.
  • the support bracket 17 is supported on a correspondingly shaped, inclinations receiving long arms 21, this support plate is placed on another plate 22, which may for example consist of concrete, and over which the substrate is stabilized in the surface region.
  • the anchor head device 16 is protected in a known, not shown manner against corrosion.
  • FIG. 9 again shows the one end 4 with the longitudinal body 8 of the Erd- and rock anchor 3 and anchored in the ground anchoring part 2.
  • the guided through the bore 15 tension element 1 can be kept free, it is also conceivable, the bore with a corresponding hardenable mass up fill.
  • Such earth and rock anchors can be produced in a simple manner, the introduction of force through the anchoring part in the substrate to be stabilized is optimal, the tension element is not subject to corrosion, thus can be dispensed with appropriate controls.
  • Such earth and rock anchors can be used in a simple manner in the ground, they can also be easily transported because the tension element is flexible and can be wound up, whereby a large space savings is achieved.
  • the tension element is characterized by a very low weight.
  • the tension member can be dimensioned accordingly by the band may be wider and / or thicker, depending on which forces must be absorbed.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)
EP13177343.4A 2013-07-22 2013-07-22 Ancrage de terre ou de rocher Active EP2829661B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP13177343.4A EP2829661B1 (fr) 2013-07-22 2013-07-22 Ancrage de terre ou de rocher
US14/331,756 US9488048B2 (en) 2013-07-22 2014-07-15 Ground and rock anchor
JP2014146840A JP2015021383A (ja) 2013-07-22 2014-07-17 グラウンドおよびロックアンカー
CA2857324A CA2857324C (fr) 2013-07-22 2014-07-18 Ancrage pour sol et roc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13177343.4A EP2829661B1 (fr) 2013-07-22 2013-07-22 Ancrage de terre ou de rocher

Publications (2)

Publication Number Publication Date
EP2829661A1 true EP2829661A1 (fr) 2015-01-28
EP2829661B1 EP2829661B1 (fr) 2017-11-22

Family

ID=48803450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13177343.4A Active EP2829661B1 (fr) 2013-07-22 2013-07-22 Ancrage de terre ou de rocher

Country Status (4)

Country Link
US (1) US9488048B2 (fr)
EP (1) EP2829661B1 (fr)
JP (1) JP2015021383A (fr)
CA (1) CA2857324C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015220581A1 (de) * 2015-10-21 2017-04-27 Technische Universität Berlin Zugelement aus faserverstärktem Kunststoff

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108687491A (zh) * 2017-04-11 2018-10-23 中国石化工程建设有限公司 工业炉钢结构预制件螺栓连接的对孔方法
US10988906B2 (en) * 2019-03-11 2021-04-27 Horst K. Aschenbroich Controlling backflow from drilling with hollow rebar and grouting
WO2022198269A1 (fr) * 2021-03-23 2022-09-29 Cmte Development Limited Boulon d'ancrage en fibre de carbone

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472120A (en) * 1968-06-03 1969-10-14 Raymond H Taylor Looped cable wedge-type eyebolt
EP1589146A1 (fr) * 2004-04-21 2005-10-26 AVT Anker + Vorspanntechnik AG Tirant d'ancrage comportant un faisceau de fils métalliques
CH701928B1 (de) * 2008-06-13 2011-04-15 Stahlton Ag Drahtschlaufenanker.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999391A (en) * 1975-06-12 1976-12-28 Meredith Drilling Co., Inc. Tie-back anchor components and method for a shoring system
US5472296A (en) * 1992-08-20 1995-12-05 Dyckerhoff & Widmann Aktiengesellschaft Corrosion protected support element for a soil anchor or a rock anchor, a pressure pile or the like
GB2340144B (en) * 1998-08-06 2000-06-28 Keller Ltd Ground anchorage
EP2439359A1 (fr) * 2010-10-06 2012-04-11 F.J. Aschwanden AG Procédé de renforcement de plaques bétonnées dans le domaine d'éléments d'appui

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472120A (en) * 1968-06-03 1969-10-14 Raymond H Taylor Looped cable wedge-type eyebolt
EP1589146A1 (fr) * 2004-04-21 2005-10-26 AVT Anker + Vorspanntechnik AG Tirant d'ancrage comportant un faisceau de fils métalliques
CH701928B1 (de) * 2008-06-13 2011-04-15 Stahlton Ag Drahtschlaufenanker.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015220581A1 (de) * 2015-10-21 2017-04-27 Technische Universität Berlin Zugelement aus faserverstärktem Kunststoff
US11396138B2 (en) 2015-10-21 2022-07-26 Technische Universitat Berlin Traction element made of fiber reinforced plastic

Also Published As

Publication number Publication date
US20150023740A1 (en) 2015-01-22
EP2829661B1 (fr) 2017-11-22
JP2015021383A (ja) 2015-02-02
CA2857324A1 (fr) 2015-01-22
US9488048B2 (en) 2016-11-08
CA2857324C (fr) 2021-01-26

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