EP2027366B1 - Faserverstärkter kunststoff-bohranker - Google Patents

Faserverstärkter kunststoff-bohranker Download PDF

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Publication number
EP2027366B1
EP2027366B1 EP07725617A EP07725617A EP2027366B1 EP 2027366 B1 EP2027366 B1 EP 2027366B1 EP 07725617 A EP07725617 A EP 07725617A EP 07725617 A EP07725617 A EP 07725617A EP 2027366 B1 EP2027366 B1 EP 2027366B1
Authority
EP
European Patent Office
Prior art keywords
drilling anchor
drilling
fibres
longitudinal direction
fibre layer
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.)
Not-in-force
Application number
EP07725617A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2027366A1 (de
Inventor
Kenichi Tsukamoto
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.)
FiRep Rebar Tech GmbH
Original Assignee
FiRep Rebar Tech 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 FiRep Rebar Tech GmbH filed Critical FiRep Rebar Tech GmbH
Priority to PL07725617T priority Critical patent/PL2027366T3/pl
Publication of EP2027366A1 publication Critical patent/EP2027366A1/de
Application granted granted Critical
Publication of EP2027366B1 publication Critical patent/EP2027366B1/de
Not-in-force 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
    • E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt material

Definitions

  • the present invention relates to a drilling anchor according to the preamble of claim 1.
  • Such drilling anchors are made of fiber-reinforced plastic, wherein fibers extending both in the longitudinal direction of the drilling anchor and fibers running obliquely to the longitudinal direction of the drilling anchor are embedded in a plastic matrix.
  • the drilling anchors are provided with a central channel which is formed by an axial bore extending over the entire length of the drilling anchor.
  • Drilling anchors are also well known as so-called "self-drilling" anchors (SB anchors). They are mainly used in mining or tunneling to secure components such as ceilings or walls. In particular, they are used when rock, mountains or rocks are brittle and the anchor well is so unstable that it collapses during drilling or after pulling the conventional drill string and a conventional anchor can not be set.
  • the drilling anchors combine the function of the drill string, which conventionally in connection with a percussion or rotary drilling machine drilling holes, with the function of the subsequently inserted into the drilled holes anchor, so that the extraction of the drill string and the breaking of the borehole wall can be avoided can.
  • the drilling anchors are provided at the front with a drill bit and connected at the back with a drill or drilling device.
  • Fiber-reinforced plastics are fiber composites in which the plastics are combined with fibers made of a different material in order to obtain positive synergy effects and improved in the desired direction, in particular mechanically improved properties of the plastic.
  • a plurality of parallel oriented fibers which may for example have a diameter of 10 to 30 microns, is thus surrounded by a matrix of plastic resin.
  • the fibers give the composite its high strength in the longitudinal direction, while the resin matrix serves to fix the fibers in their position while protecting them from harmful influences.
  • a multi-layered cable anchor in which a rope made of textile yarn is surrounded by a support braid and may contain an inner soul.
  • an outer protective sheath made of plastic is additionally provided.
  • such a cable anchor can not be used as a drilling anchor for the applications mentioned above, since apart from a missing external thread neither a transmission of high torques nor an effective transmission of impact energy of the hammer to a drill bit mounted on the anchor bit is possible. Rather, it is designed as a flexible anchor with its rope-like construction for tumbling as endless material, which can be introduced only in already completed holes.
  • a rock anchor made of plastic which consists of synthetic materials, which are arranged in superimposed layers.
  • the anchor can also be designed as a hollow anchor for injecting.
  • this rock anchor is also not suitable for drilling due to its lack of rigidity, since it is designed as a yielding system to withstand movements in sedimentary rocks and convergences, which is comparable to increased ductility in steel.
  • the rock anchor also has no external profiling or no external thread, so that it can not be used as a drilling anchor for this reason.
  • fiber reinforced plastic drilling anchors of the type mentioned above are from WO 96/21087 known as the closest prior art. They each have a limited axial extent at the two end regions thread. These drilling anchors include both helically wound fibers and longitudinal fibers.
  • a disadvantage of these known drilling anchors is only a limited composite effect in pressed concrete or other surrounding media or surrounding rock.
  • the loads occurring during drilling can lead to damage to the drilling anchors despite the two-layer fiber structure.
  • the object of the present invention is therefore to provide an improved drilling anchor of the type mentioned above made of fiber-reinforced plastic, which can better absorb the complex occurring stresses and resulting forces in drilling operation.
  • a multi-functional to be used anchor drill is provided, which has sufficient hydraulic strength for flushing with drilling water and the subsequent high-pressure injection at very high pressures and at the same time can compensate for the introduced into the anchor complex tensions and burdens in pre-destroyed rock.
  • a first fiber layer with fibers extending obliquely to the longitudinal direction of the drilling anchor is surrounded by a second fiber layer with fibers running in the longitudinal direction of the drilling anchor, such that the second fiber layer extends from at least one third fiber layer with an angle to the longitudinal direction of the drilling anchor Fibers is surrounded, and that the drilling anchor has a over its entire length extending thread, which is formed in at least one outer fiber layer of the drilling anchor.
  • the main advantage lies in the fact that a much more versatile Bohranker to be used is created, which ensures a permanently greater safety at a much higher load capacity.
  • the complex stresses and resulting forces occurring during the drilling process in particular drag forces from axial compression and torsion z. B. by Friction and cutting force are absorbed much better.
  • much higher hydraulic pressures when flushing with drilling water, but especially during subsequent high-pressure injecting z. B. with 2-K systems and pressures over 300 bar without damage to the drilling anchor are included and at the same time the complex introduced from tensile, shear and shear stresses and strains of the anchor in the rock can be compensated.
  • the drilling anchor according to the invention is inexpensive to manufacture and easy to handle with low weight with a simple design. In addition, an optimal corrosion protection is guaranteed even in long-term applications.
  • the third fiber layer is surrounded by at least one fourth fiber layer. It is particularly advantageous if the third fiber layer is surrounded by at least one fourth fiber layer. As a result, an even better strength and an optimized training of the drilling anchor can be achieved.
  • the first and / or third fiber layer comprises fibers which are wound helically at an angle between 30 ° and 60 °, in particular between 40 ° and 50 °, preferably at an angle of approximately 45 ° to the longitudinal direction of the drilling anchor are.
  • first and / or third fiber layers each comprise a first group of fibers which are wound at an angle of between 30 ° and 60 ° to the longitudinal direction of the drilling anchor in a first gradient orientation and also a second group of fibers , which are wound at an angle between 30 ° and 60 ° to the longitudinal direction of the drilling anchor in the opposite slope orientation.
  • the two groups of fibers can be introduced either separately in succession or mixed together.
  • the fibers of individual fiber layers are embedded in plastics which are different from the plastic of the adjacent fiber layers.
  • the fibers of individual fiber layers may consist of a material which is different from the material of the adjacent fiber layers.
  • the first and / or third fiber layer comprises fibers running obliquely to the longitudinal direction of the drilling anchor and embedded in vinyl ester resin.
  • the embedding of the inner channel limiting fibers in vinyl ester resin advantageously serves to increase the chemical resistance of the drilling anchor.
  • the second fiber layer with fibers extending in the longitudinal direction of the drilling anchor is preferably embedded in epoxy resin. They thus allow optimum transfer of tensile and compressive forces even with a pulse-like impact load.
  • the fibers of the first and / or second fiber layer are glass fibers.
  • the fibers of the third fiber layer are preferably carbon fibers.
  • the fourth fiber layer comprises glass fibers, which are preferably embedded in epoxy resin.
  • the thread can be formed without a fiber gate. In this way, a high-strength thread is achieved without cutting and thus without destroying the fibers, which produces an optimal composite effect to its environment at its length according to the invention.
  • the drilling anchor based on the volume, has a fiber content of at least 80% and a plastic resin content of at most 20%. In this way optimal strength values are achieved with regard to all occurring loads.
  • the thread of the drilling anchor is provided with a hardened protective coating.
  • the protective coating may consist of topcoating, in particular of a cured gel, and serve not only a mechanical protection, but also a UV protection and, in particular, an acid protection of the thread.
  • the present invention further relates to a method of making a drilling anchor of the type described above. Thereafter, the drilling anchor is pultruded in multiple layers with separate layers, thereby enabling cost effective and easy fabrication in spite of the improved properties of the drilling anchor.
  • the drilling anchor 1 shown in the figures consists of fiber-reinforced plastic, which is constructed in multiple layers.
  • the drilling anchor 1 has a continuous over its entire length axial bore 2 and also over its entire length continuous external thread 3 with a wavy contour.
  • the fibers or the groups of fibers are not only arranged in a parallel unidirectional manner but in particular wound in the uppermost layer opposite the thread rotation and drilling direction or embedded in the resin matrix.
  • two groups of glass fibers are embedded in a first fiber layer 4 with simultaneously high mechanical and chemical resistance in vinyl resin to increase the hydraulic stability. These two groups of the first fiber layer 4 are each wound at an angle of 45 ° to the axial alignment of the drilling anchor 1 in opposite directions.
  • a second fiber layer 5 of glass fibers is embedded in the longitudinal direction of the drilling anchor 1 in epoxy resin. It serves to accommodate high mechanical axial tensile and compressive forces.
  • carbon fibers are opposite to the rotation and drilling direction of the external thread 3 embedded in vinyl ester resin. They take over the special reaction forces from the drilling work. At the same time they provide permanent protection for the glass fibers in the core against external chemical effects due to the receiving vinyl ester resin.
  • the high-strength thread 3 is formed without destroying the continuous glass fibers.
  • the drilling anchor 1 is injected after drilling through various adapter systems.
  • cement mortar that is not critical because no high injection pressures and hardly reaction pressures occur, not mixed on or in the drilling anchor 1 high energy and pressure must be maintained and the borehole itself must not be kept consuming closed.
  • good sealing adapters with upstream valves, integrated mixer, nozzle and check valve must be used.
  • the anchor tube 1 itself must also be generally hydraulically loadable up to about 250 bar working pressure or nominal pressure (350 bar bursting pressure). This load capacity is achieved by the inventive design of the drilling anchor 1.
  • a self-drilling FRP anchor 1 for right-handed rotatory drilling has a limited torsional resistance, in contrast to steel pipes due to the anisotropy of the fiber composite.
  • the drilling anchor according to the invention is optimized with regard to resin quality and fiber quality as well as fiber orientation and process.
  • both one or more unidirectional fiber courses 5 and one or more helically wound fiber courses 4, 6 are combined with the same and / or different directions and also the same or different gradients independently of one another in any desired combination ,
  • the fibers may have an opposite grain, so that left-handed screw for left-handed drilling then a right-handed wound fiber in the edge layer 7 is present and vice versa the plastic tube 1 for right-handed drilling a right-handed screw with has left-handed fiber profile in the edge layer 7.
  • the geometry of the fferprofilleiter each left- or right-handed thread-compatible with various standard accessories from the left-rotary impact drilling area or from the right-rotary drilling area can be screwed.
  • the continuous screw 3 also in mortars and concrete with optimized related ribbed surface excellent composite properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Piles And Underground Anchors (AREA)
  • Laminated Bodies (AREA)
  • Dowels (AREA)
EP07725617A 2006-05-29 2007-05-29 Faserverstärkter kunststoff-bohranker Not-in-force EP2027366B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07725617T PL2027366T3 (pl) 2006-05-29 2007-05-29 Samowiercąca kotwa z tworzywa sztucznego wzmocnionego włóknami

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006025248A DE102006025248A1 (de) 2006-05-29 2006-05-29 Faserverstärkter Kunststoff-Bohranker
PCT/EP2007/004722 WO2007137807A1 (de) 2006-05-29 2007-05-29 Faserverstärkter kunststoff-bohranker

Publications (2)

Publication Number Publication Date
EP2027366A1 EP2027366A1 (de) 2009-02-25
EP2027366B1 true EP2027366B1 (de) 2009-10-14

Family

ID=38344761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07725617A Not-in-force EP2027366B1 (de) 2006-05-29 2007-05-29 Faserverstärkter kunststoff-bohranker

Country Status (9)

Country Link
US (1) US8172484B2 (pl)
EP (1) EP2027366B1 (pl)
AT (1) ATE445763T1 (pl)
AU (1) AU2007267379B2 (pl)
CA (1) CA2659568C (pl)
DE (2) DE102006025248A1 (pl)
ES (1) ES2334850T3 (pl)
PL (1) PL2027366T3 (pl)
WO (1) WO2007137807A1 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023001490A1 (de) * 2021-07-20 2023-01-26 Svm Schultz Verwaltungs-Gmbh & Co. Kg Elektromagnetischer aktuator mit faserelement

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DE102006025248A1 (de) 2006-05-29 2007-12-06 Beltec Industrietechnik Gmbh Faserverstärkter Kunststoff-Bohranker
EP1998056A1 (en) * 2007-05-29 2008-12-03 Sgl Carbon Ag Composite fastener for ceramic components
DE102007027015A1 (de) * 2007-06-08 2008-12-11 Schöck Bauteile GmbH Bewehrungsstab
KR20100130286A (ko) * 2009-06-03 2010-12-13 에스케이케미칼주식회사 섬유강화수지 볼트 및 그 제조방법
WO2011067797A1 (en) * 2009-12-03 2011-06-09 Elas Geotecnica S.R.L Method and plant for producing a fiberglass profile to be used as reinforcing element for strengthening an excavation wall
DE102010043765B4 (de) * 2010-11-11 2014-08-28 Hilti Aktiengesellschaft Ankerbaugruppe sowie Verfahren zur Herstellung einer Ankerbaugruppe
DE102010043769B4 (de) * 2010-11-11 2015-07-09 Hilti Aktiengesellschaft Ankerbaugruppe, insbesondere für den Berg- und Tunnelbau
DE102010053843A1 (de) * 2010-12-08 2012-06-14 Daimler Ag Verbindungsanordnung
CN102979097B (zh) * 2011-09-07 2017-02-22 上海启鹏工程材料科技有限公司 一种编织套管型frp筋及其制备方法
US9752435B2 (en) * 2012-07-23 2017-09-05 Setevox (Pty) Ltd Mine roof support
CN106414038A (zh) * 2014-03-07 2017-02-15 庞巴迪公司 复合铆钉坯件和所述复合铆钉坯件的安装
CN104912070B (zh) * 2015-05-27 2017-06-30 郑州大学 高性能frp锚杆的制造工艺及抗扭承载力计算方法
US10077856B2 (en) 2015-06-05 2018-09-18 Advanced Drainage Systems Inc. Pipe with an outer wrap
US9759354B2 (en) 2015-06-05 2017-09-12 Advanced Drainage Systems, Inc. Pipe with an outer wrap
US10077857B2 (en) 2015-06-05 2018-09-18 Advanced Drainage Systems Inc. Pipe with an outer wrap
CN106703851A (zh) * 2017-01-11 2017-05-24 辽宁工程技术大学 一种可延伸防破断玻璃钢锚杆
CN107119855B (zh) * 2017-05-27 2022-08-26 东南大学 提高复材筋锚固性能的结构及其挤压成型方法
AU2018375020B2 (en) 2017-11-28 2024-05-02 Comprite Mining Pty Ltd Non-metallic split set rockbolt
CN114017086B (zh) * 2021-11-10 2023-07-25 山东科技大学 一种适应围岩大变形的抗拉-剪连续玄武岩纤维复合锚杆

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Publication number Priority date Publication date Assignee Title
WO2023001490A1 (de) * 2021-07-20 2023-01-26 Svm Schultz Verwaltungs-Gmbh & Co. Kg Elektromagnetischer aktuator mit faserelement

Also Published As

Publication number Publication date
CA2659568A1 (en) 2007-06-12
CA2659568C (en) 2014-12-16
DE502007001746D1 (de) 2009-11-26
ES2334850T3 (es) 2010-03-16
AU2007267379A1 (en) 2007-12-06
WO2007137807A1 (de) 2007-12-06
ATE445763T1 (de) 2009-10-15
US8172484B2 (en) 2012-05-08
US20090297278A1 (en) 2009-12-03
DE102006025248A1 (de) 2007-12-06
PL2027366T3 (pl) 2010-03-31
EP2027366A1 (de) 2009-02-25
AU2007267379B2 (en) 2012-05-17

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