EP3690187B1 - Vorspannbarer verpressanker - Google Patents

Vorspannbarer verpressanker Download PDF

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Publication number
EP3690187B1
EP3690187B1 EP14450046.9A EP14450046A EP3690187B1 EP 3690187 B1 EP3690187 B1 EP 3690187B1 EP 14450046 A EP14450046 A EP 14450046A EP 3690187 B1 EP3690187 B1 EP 3690187B1
Authority
EP
European Patent Office
Prior art keywords
anchor
tension members
tension
loadable
tensioning
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.)
Active
Application number
EP14450046.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3690187A1 (de
Inventor
Richard GUTSCHE
Gerold BRANDSTÄTTER
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.)
Porr Bau GmbH
Original Assignee
Porr Bau GmbH
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 Porr Bau GmbH filed Critical Porr Bau GmbH
Priority to PL14450046T priority Critical patent/PL3690187T3/pl
Publication of EP3690187A1 publication Critical patent/EP3690187A1/de
Application granted granted Critical
Publication of EP3690187B1 publication Critical patent/EP3690187B1/de
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
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/025—Grouting with organic components, e.g. resin
    • 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
    • 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
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material
    • 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
    • E21D21/0053—Anchoring-bolts in the form of lost drilling rods
    • 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
    • E21D21/0066—Anchoring-bolts formed by a bundle of radially arranged rigid elements

Definitions

  • the invention relates to a pre-tensionable grout anchor according to the preamble of claim 1.
  • Grout anchors are known which are intended to transmit an applied tensile force to a layer in the subsurface.
  • the grout anchor has a grout body which is arranged in the ground and which is connected to an anchor head via tension members.
  • the anchor head is connected to the structure to be held or rests on it, which is anchored to the ground by means of the prestressed tension members.
  • Such grout anchors can be used as temporary anchors or as permanent anchors.
  • a prestressable grout anchor with anchor tension members made of a non-metallic material is known, one end of the anchor tension members being connected to a coupling device with an adhesive, a tension tension member for tensioning the prestressable grout anchor being indirectly connected to the coupling device and one end of the anchor tension members being embedded in the adhesive .
  • the anchor tension members comprising a non-metallic fiber material and the anchor tension members being glued to the coupling device at one end with an adhesive.
  • the anchor tension members comprising a non-metallic fiber material and being glued to the coupling device at one end with an adhesive.
  • Fiber optic cables as tension members, as these are easier to cut than tension members made of steel or other metals, which is why they can remain in the ground without any problems.
  • the object of the invention is therefore to provide a pre-stressable grout anchor of the type mentioned at the beginning, with which the mentioned disadvantages can be avoided, which is easy to handle and can be pre-stressed with conventional means.
  • anchor tension members By using a non-metallic fiber material as anchor tension members, they can remain in the ground without any problems even after the excavation has been dismantled, as they can be easily separated. Furthermore, a compact design can thereby be achieved, whereby the diameter of the borehole can be kept small.
  • a particularly simple but also durable coupling of the anchor tension members with the coupling device can be effected, whereby damage to the anchor tension members can be avoided, which would be the case, for example, with a purely mechanical connection such as clamps.
  • the Figs. 1 to 3 show a pre-stressable grout anchor 1 comprising a plurality of anchor tension members 2 according to the invention.
  • a grout anchor 1 is also referred to as a prestressed anchor or a ground or rock anchor.
  • the ground anchor 1 is a geotechnical component which transmits an applied tensile force into the subsoil 10.
  • a borehole 11 is made in the subsurface 10
  • the anchor tension members 2 are introduced into the bore hole 11 and then the anchor tension members 2 are anchored in the bore hole 11 by means of a grouting body 12.
  • the grout 12 can be made of cement, concrete or the like.
  • the anchor tension members 2 comprise a non-metallic fiber material.
  • a non-metallic fiber material can in particular be glass fiber cables.
  • Fiber optic cables offer the advantage that they have a high tensile strength, are chemically resistant and are easy to manufacture.
  • carbon fibers, plastic fibers, for example made of aramid or nylon, natural fibers, ceramic fibers or similar material can be used for the anchor tension members 2.
  • the anchor tension members 2 can in particular comprise a composite material comprising non-metallic fiber material.
  • the anchor tension members 2 are glued to a coupling device 4 at one end 6 by means of an adhesive 3, and a tension tension member 5 for tensioning the pre-tensionable grout anchor 1 is at least indirectly connected to the coupling device 4.
  • the coupling device 4 connects the anchor tension members 2 to a tension tension member 5, the tension tension member 5 proceeding to be tensioned with a tensioning device 9.
  • the tension member 5 can in particular be made of metal, in particular steel.
  • the tension member 5 is designed as a steel tension member.
  • anchor tension members 2 are essentially glued to their lateral surfaces.
  • the adhesive point is subjected to thrust and not tensile stress, which means that it can absorb particularly high forces.
  • another end 13 of the anchor tension members that is to say an end 13 of the anchor tension members 2 opposite the end 6 bonded to the coupling device 4, can be in direct contact with the grout body 12.
  • the grout anchor 1 can in particular be designed as a short-term anchor or as a temporary grout anchor. Such grout anchors 1 are provided for a period of use of only a few years. By using the non-metallic fiber material, the anchor tension members 2 can remain in the subsurface 10, which means that the dismantling effort can be significantly reduced.
  • the grout anchor 1 is designed as a permanent anchor.
  • Such grout anchors 1 are provided for a long period of use, for example at least a hundred years.
  • the anchor tension members 2 comprising non-metallic fiber material can be more corrosion-resistant than anchor tension members 2 made of metal.
  • the pressing body 12 can essentially only be arranged adjacent to the other end 13 of the anchor tension members 2.
  • the grouting body 12 essentially fills the entire borehole 11.
  • a preferred embodiment of the pre-tensionable grout anchor 1 is shown, the grout body 12 not being shown.
  • the complete grout anchor 1 is shown, which is arranged in the borehole 11. It can particularly preferably be provided that a free-running section 14 is arranged between the one end 6 and the other end 13 of the anchor tension members 2.
  • the anchor tension members 2 can be arranged in a sleeve 15, in particular in a plastic sleeve, so as to be freely movable in the longitudinal direction thereof.
  • the sheath 15 can enclose individual anchor tension members 2 or an entire strand of anchor tension members 2.
  • the anchor tension members 2 can transfer the tensile forces from the coupling device 4 to the grouting body 12 without hindrance, with the anchor tension members 2 also being able to expand unhindered under the pretension in the freewheeling section 14. Due to the sheath 15, the anchor tension members 2 in the freewheeling section 14 are not in contact with the grouting body 12.
  • the anchor tension members 2 have a length between 3 m and 20 m.
  • anchor tension members 2 are essentially of the same length.
  • a length of the freewheeling section 14 is greater than the areas which represent one end 6 and the other end 13 of the anchor tension members 2.
  • anchor tension members 2 run parallel to one another.
  • the anchor tension members 2 are at least four times as long as the tension tension member 5.
  • the anchor tension members 2 can be left in the subsurface 10, while in the case of a short-term anchor only the shorter tension tension member 5 has to be removed.
  • the adhesive 3 is a resin, preferably a synthetic resin, in particular an epoxy resin.
  • Resins have the advantage that they can be easily implemented by means of casting.
  • epoxy resin is water-resistant.
  • one end 6 of the anchor tension members 2 in the Adhesive 3 is embedded.
  • a particularly large adhesive surface can be achieved here. Furthermore, the penetration of fluids causing corrosion into the coupling device 4 and the areas below it can be prevented.
  • the coupling device 4 has a sleeve 7, and one end 6 of the anchor tension members 2 is arranged within the sleeve 7.
  • the sleeve 7, which in Fig. 1 and Fig. 3 is shown partially cut away, surrounds the ends 6 of the anchor tension members 2 and is glued to them by means of the adhesive 3.
  • a good integration of the ends 6 of the anchor tension members 2 can be achieved through the sleeve 7, wherein the sleeve 7 can provide a defined area which can be filled with the adhesive 3.
  • the sleeve 7 can in particular be designed to include metal and / or plastic.
  • the sleeve 7 can in particular have a hollow cylindrical shape.
  • the coupling device 4 has a length of less than 2 m. As a result, it can easily be removed from the substrate 10 again in the case of a short-term anchor.
  • the length of the sleeve 7 can essentially correspond to the length of the coupling device 4.
  • the anchor tension members 2 extend essentially over the entire length of the sleeve 7 in the sleeve 7.
  • the anchor tension members 2 can be arranged in the sleeve over the entire length of the sleeve 7. As a result, a particularly large adhesive surface can be provided.
  • the grout anchor 1 has only one tension member 5.
  • One tension member 5 can be designed as a strand, rod or rope.
  • the grout anchor 1 has several tension members.
  • the number of anchor tension members 2 is greater than the number of tension tension members 5.
  • a first region 8 of the tension member 5 is arranged inside the sleeve 7.
  • the first area 8 of the tension tension member 5 and the one ends 6 of the anchor tension members 2 can be arranged in an overlapping manner in the sleeve 7, whereby a particularly good transmission of force through the adhesive 3 is possible.
  • a second region 16 of the tensioning tension member 5 of the tensioning tension member can be provided which can be tensioned with a tensioning device 9.
  • the clamping device 9 is provided for applying and holding the clamping force.
  • the tensioning tension member 5 has a thread for engaging a tensioning device 9.
  • the tensioning device 9 can in particular have an internal thread, whereby the tensioning force can be adjusted by turning the tensioning device 9 and the pre-tensionable grout anchor 1 can be easily re-tensioned.
  • the tensioning tension member 5 is designed as a threaded rod.
  • the clamping device 9 is provided as a perforated plate with wedges.
  • the tension member 5 can be tensioned by means of an external device and then fixed in the perforated plate with the wedges in the pre-tensioned situation.
  • the anchor tension members 2 are arranged in a substantially uniformly distributed manner around the first region 8 of the tension tension member 5.
  • the coupling device 4 can thereby be designed in a particularly simple and space-saving manner.
  • Such an arrangement is in Fig. 2 shown, wherein the individual strands of the anchor tension members 2 are arranged in a circular arrangement around the central tension member 5.
  • the tension member can in particular be arranged coaxially to the sleeve 4.
  • the pre-tensionable grout anchor 1 has at least three anchor tension members 2, in particular five to twenty anchor tension members 2.
  • the introduction of force can be passed on particularly evenly via the individual anchor tension members 2 to a centrally arranged tension tension member 5.
  • a diameter of the tension tension member 5 is greater than a diameter of the anchor tension members 2.
  • the anchor tension members 2 can be arranged better circumferentially around the tension tension member 5, as a result of which a uniform transmission of force is improved.
  • the tension member 5 is glued directly to the coupling device 4 by means of the adhesive 3.
  • the use of additional connecting means can be dispensed with, as a result of which the coupling of the tensioning tension member 5 to the coupling device 4 can be made particularly simple.
  • the tensioning tension member 5 is essentially glued to its outer surface.
  • the tension tension member 5 and the anchor tension members 2 are jointly embedded in an adhesive formed as a resin. Such a connection is in Fig. 2 shown, wherein the tension member 5 and the annularly arranged anchor tension members 2 are embedded in the resin.
  • the coupling device 4 has a connecting device, and that the tensioning tension member 5 is connected to the connecting device.
  • the connecting device can in particular be designed for releasably connecting the tensioning tension member 5.
  • the connecting device can be designed as a threaded sleeve into which the tensioning tension member 5 is screwed.
  • the connecting device can be attached to the sleeve 7.
  • the connecting device has the advantage that the tensioning tension member 5 can easily be detached from the coupling device 4, as a result of which the dismantling of the grout anchor 1 can be made particularly simple.
  • an injection tube passes through the sleeve 7.
  • the injection tube is used to bring the material for the grout body 12 to the ground of the borehole 11 to direct.
  • the injection tube can be passed between the tension member 5 and the anchor members 2 through the sleeve 7 and embedded there. This enables a particularly compact design to be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Piles And Underground Anchors (AREA)
EP14450046.9A 2013-10-18 2014-10-15 Vorspannbarer verpressanker Active EP3690187B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14450046T PL3690187T3 (pl) 2013-10-18 2014-10-15 Wstępnie naprężana kotwa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA806/2013A AT514992B1 (de) 2013-10-18 2013-10-18 Vorspannbarer Verpressanker

Publications (2)

Publication Number Publication Date
EP3690187A1 EP3690187A1 (de) 2020-08-05
EP3690187B1 true EP3690187B1 (de) 2021-07-28

Family

ID=53029033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14450046.9A Active EP3690187B1 (de) 2013-10-18 2014-10-15 Vorspannbarer verpressanker

Country Status (3)

Country Link
EP (1) EP3690187B1 (pl)
AT (1) AT514992B1 (pl)
PL (1) PL3690187T3 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017102490U1 (de) 2017-04-27 2017-05-17 FiReP International AG Ankeranordnung im Boden sowie Bodenanker
CN114197463A (zh) * 2021-11-26 2022-03-18 北京市市政四建设工程有限责任公司 一种gfrp筋与钢绞线复合式锚杆结构及其使用方法
CN114622554A (zh) * 2022-01-18 2022-06-14 吉林大学 压力分散型锚索承载结构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2876056B2 (ja) * 1991-08-02 1999-03-31 株式会社銭高組 新素材地盤永久アンカー
JP2590930Y2 (ja) * 1993-12-28 1999-02-24 東京製綱株式会社 グランドアンカ−用アンカー体
JPH11193526A (ja) * 1997-12-26 1999-07-21 Tokyo Seiko Co Ltd 繊維複合線状材の緊張定着工法
CN203035213U (zh) * 2012-11-16 2013-07-03 山东科技大学 一种膨胀式锚杆

Also Published As

Publication number Publication date
PL3690187T3 (pl) 2022-03-07
AT514992A1 (de) 2015-05-15
AT514992B1 (de) 2015-07-15
EP3690187A1 (de) 2020-08-05

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