EP2354448A2 - Boulon d'ancrage auto-foreur doté d'un joint pour le boulon - Google Patents

Boulon d'ancrage auto-foreur doté d'un joint pour le boulon Download PDF

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Publication number
EP2354448A2
EP2354448A2 EP11152558A EP11152558A EP2354448A2 EP 2354448 A2 EP2354448 A2 EP 2354448A2 EP 11152558 A EP11152558 A EP 11152558A EP 11152558 A EP11152558 A EP 11152558A EP 2354448 A2 EP2354448 A2 EP 2354448A2
Authority
EP
European Patent Office
Prior art keywords
anchor
anchor rod
bohrankerdichtung
injection channel
seal
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.)
Withdrawn
Application number
EP11152558A
Other languages
German (de)
English (en)
Other versions
EP2354448A3 (fr
Inventor
Jörg Küchler
Anton Grenko
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.)
Kuechler Technik AG
Original Assignee
Kuechler Technik 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 Kuechler Technik AG filed Critical Kuechler Technik AG
Publication of EP2354448A2 publication Critical patent/EP2354448A2/fr
Publication of EP2354448A3 publication Critical patent/EP2354448A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the present invention describes a drill anchor seal which is completely sealable within an extension sleeve in the region of a central web, at least partially lying in an injection channel of a self-drilling anchor between adjacent anchor rod elements, and a self-drilling anchor comprising at least one drill anchor seal fully supported in an extension sleeve.
  • Self-drilling anchors have been known for a long time in special foundation engineering, which are primarily loaded with tension and initiate forces into deeper soil layers.
  • These self-drilling anchors are formed from a multi-part anchor rod, comprising a plurality of anchor rod elements, which have as hollow rod elements extending in the direction of the longitudinal axis injection channel.
  • the anchor rod has an anchor outer thread extending along the circumference.
  • a drill bit is arranged at the in the ground to be lowered first anchor rod element and thus the front end of the anchor rod.
  • the side of the anchor rod is referred to, which is sunk in the ground, while the rear side or luft beginnerem end of the projected hole projecting end of the anchor rod is designated.
  • the anchor rod and the individual anchor rod elements act as a drill pipe, wherein the air-side end of the anchor rod a Drilling device, such as a rotary hammer for rotating and / or rotationally driven drilling the anchor rod is fastened.
  • a Drilling device such as a rotary hammer for rotating and / or rotationally driven drilling the anchor rod is fastened.
  • an injection fluid preferably cement or mortar suspension is injected through the axial injection channel, which escapes in the region of the drill bit from at least one injection nozzle in the resulting well, whereby the well filled and the self-drilling anchor can be fixed in the well.
  • the drill bit is in this process a lost drill bit.
  • a coupling sleeve or extension sleeve which has an internal thread and tapers in the region of a central web.
  • the front ends of the anchor rod elements and the rear ends of the adjacent anchor rod elements are firmly bolted in the coupling sleeve and partially cold deformed uncontrollably in the coupling sleeve.
  • the result is a purely metallic seal, which facilitates forwarding the impact energy.
  • seizure of the thread the end portions of the anchor rod elements must be sufficiently greased within the coupling sleeves.
  • the thread flanks of the end portions of the anchor rod elements must also be made exactly to achieve a necessary tightness between the anchor rod elements.
  • the known extension sleeve was provided with additional sealing washers or O-rings to achieve the required tightness.
  • the front and rear ends of the adjacent anchor rod elements must be reworked and partially chamfered in order to achieve an optimum seal.
  • additional steps are necessary, such as turning or lowering, so that increases the production time of the anchor rod elements and makes the production more expensive.
  • the gaskets or O-rings are not located on a central web between the socket internally threaded from both sides of the extension sleeve, whereby the gaskets or O-rings can even protrude into the injection channel.
  • the sealing washers or O-rings they can be damaged in the extension sleeve, which reduces the sealing effect.
  • the object of the present invention is to provide a self-drilling anchor whose directly adjacent arranged anchor rod elements by means of a Bohrankerdichtung and an extension sleeve are connected such that the injection channel is sealed in the region of the transitions between adjacent anchor rod elements against high injection fluid pressures of up to 600 bar ,
  • Another object of the present invention is to provide a well seal which guarantees tightness within the extension sleeve at high injection fluid pressures of up to 600 bar and does not require any special machining or reworking of the end surfaces of the ends of adjacent anchor rod elements.
  • FIG. 1 shows a Caribbean rocker or Injedgingsbohranker 0 for use in Hoch horrinjetechnischsvon in special civil engineering with a longitudinal axis L, which has a multi-part anchor rod 1 substantially.
  • a drill bit 13 is detachably or non-detachably fastened to a first anchor rod element 10.
  • the drill bit 13 is used here as a lost drill bit 13 and thus as a disposable drill bit 13.
  • the first anchor rod element 10 is detachably connected to a second anchor rod element 11 by means of an extension sleeve 2.
  • Further n-th anchor rod elements can be connected in the same way with the respective adjacent n-1 th anchor rod element.
  • the self-drilling anchor 0 With the drill bit 13 in the direction of the advancing direction R of the self-drilling anchor 0, the self-drilling anchor 0 can be bored into the ground or the rock in a rotating or rotationally turning manner.
  • a rotary drilling device and an injection device can be connected. While the rotary drilling device drives the self-drilling anchor 0 in the feed direction R, an injection fluid can be introduced into the borehole by means of an injection device.
  • FIG. 1 an already drilled self-drilling anchor 0 is shown, wherein the well is already filled with the injection fluid.
  • the anchor rod elements 10, 11 are designed as hollow rod elements and are penetrated by a parallel to the longitudinal axis L extending injection channel 12, which forms a continuous axial cavity. In order to connect the individual anchor rod elements 10, 11, wherein a possible interruption-free injection channel 12 is ensured, the Anchor rod elements 10, 11 connected by means of extension sleeve 2.
  • the injection fluid for example in the form of a mortar or cement suspension with high pressure of up to 600 bar is pressed through the injection channel 12.
  • the injection fluid is pressed from the connection side 16 through the injection channel 12 of all n anchor rod elements up to an outlet from the injection channel 12.
  • the injection fluid can escape from at least one radial bore arranged in the drill bit 13, which opens into at least one injection nozzle 131.
  • injection fluid can be continuously introduced into the wellbore produced by the drill bit during the drilling operation to achieve a mowing action and to fill the resulting wellbore. If an extension of the Dowbohrankers 0 is required, this can be accomplished by the extension with up to n anchor rod elements between which extension sleeves 2 are arranged accordingly.
  • the individual anchor rod elements 10, 11 are each provided with an anchor outer thread 15. By suitable design of an internal thread of the drill bit 13, this can be easily attached to the anchor outer thread 15 of the first anchor rod member 10.
  • the extension sleeve 2 used for the extension of the anchor rod 1 has a socket internal thread 20 with which the extension sleeve 2 can be fixed on the anchor outer threads 15 of adjacent anchor rod elements such that the injection channel 12 can be formed continuously, wherein a drill anchor seal 3 of the extension sleeve 2 completely surrounded between the end faces of adjacent anchor rod elements is arranged.
  • the extension sleeve 2 is used in accordance between n-tem and n-1-tem anchor rod element.
  • the inventive drill anchor seal 3 is completely disposed within the extension sleeve 2, at least partially lying in the injection channel 12 between adjacent anchor rod elements 10, 11.
  • the drill anchor seal 3 has a shoulder portion 30 and at least one neck portion 31 and is completely penetrated by a channel 32 which traverses both portions 30, 31.
  • the outer diameter of the at least one neck portion 31 is made smaller than the diameter of the injection channel 12 of both adjacent anchor rod elements 10, 11, wherein the smallest possible taper of the channel 32 in comparison to the diameter of the injection channel 12 is advantageous, so that the injection fluid as unhindered by the Channel 32 of the drill anchor seal 3 can flow.
  • the walls of the at least one neck portion 31 may be cylindrical or conically shaped as shown in the figures.
  • the shoulder portion 30 has a front-side abutment surface 300 whose normal points in the direction of the drill bit 13, to which the end face of the first anchor rod element 10 can be screwed in a contact-lying manner.
  • the neck portion 31 is preferably approximately parallel to the wall of the first anchor rod member 10 projecting into the injection channel 12, as in the FIGS. 4a and 4b shown, wherein injection fluid in the feed direction R pressed becomes. But it is also an arrangement according to FIG. 3 possible, wherein the neck portion 31 partially protrudes into the injection channel 12 of the second anchor rod element 11. Experiments have shown that both types of alignment of the drill anchor seal 3 seal sufficiently.
  • a thread-free center web 21 remains through this thread-free center web 21 ensures that the anchor rod elements 10, 11 after screwing into the extension sleeve. 2 during rotation of the self-drilling anchor 0 during the turning process not rotatable and thus are linearly displaceable.
  • the shoulder portion 30 of the Bohrankerdichtung 3 comes to lie in the region of the central web 21 within the extension sleeve 2 and closes flush with the central web 21. Due to the tight fit of the end face of the second anchor rod element 11 on the rear abutment surface 301 of the shoulder portion 30, leakage of the injection fluid at high pressures can be avoided. By choosing a deformable material for the Bohrankerdichtung 3, the shoulder portion 30 during the screwing of the anchor rod elements 10, 11 slightly deformable in the direction of the central web 21, whereby a further sealing effect results.
  • the walls of the drill anchor seal 3 of the shoulder portion 30 and / or of the neck portion 31 can be designed correspondingly streamlined.
  • the rear abutment surface 301 for example, as in FIG. 4b shown rounded so that the injection fluid is directed into the channel 32.
  • a shoulder portion 30 which opens into two neck portions 31, 31 '. While the shoulder portion 30 outside the end faces of the first and second anchor rod member 10, 11 is disposed completely within the extension sleeve 2 and flush with the central web 21, a neck portion 31 protrudes into the first anchor rod member 10 and the further neck portion 31 'in the second anchor rod member 11.
  • the end face of the second anchor rod element 11 is flat on the rear abutment surface 301 and the end face of the first anchor rod element 10 flat on the front abutment surface 300 of the shoulder portion 30.
  • the outer diameter of the shoulder portion 30 corresponds to the inner diameter of the central web 21 and by screwing the anchor rod elements 10, 11, the Bohrankerdichtung 3 is deformed in the region of the shoulder portion 30, whereby a further sealing effect results.
  • the drill anchor seals 3 all have at least one neck section 31 which can be arranged protruding into the injection channel 12 of the self-drilling anchorage 0.
  • the injection channel 12 is continued via the butt joint between adjacent anchor rod elements 10, 11.
  • the end faces of the anchor rod elements 10, 11 do not touch each other in the screwed position or possibly touch only minimal with conically executed walls, so that the injection fluid from the end faces spaced at the butt joint is passed sealed by the Bohrankerdichtitch 3 completely crossing channel 32.
  • Bohrankerdichtung 3 all embodiments for example, made of light metal or flexible soft metal alloys or suitable deformable plastic material can be produced.
  • Aluminum which is sufficiently soft and corrosion-resistant, has proven itself. Due to the elasticity, a desired deformation when screwing the anchor rod elements 10, 11 can be achieved, resulting in an additional sealing effect.
  • the material the elasticity and the corrosion resistance of the materials must be taken into account in order to achieve maximum tightness of the drill anchor seal 3 at injection fluid pressures of a few hundred bars.
  • the Bohrankerdichtung 3 can be introduced in the extension of the anchor rod 1 in the injection channel 12 or even embarked on the positive and / or non-positive connection in the injection channel 12 before the faces of the anchor rod elements press the Bohrankerdichtung 3 both sides screwed between the anchor rod elements within the extension sleeve 2.
  • the drill anchor seals 3 By using the drill anchor seals 3 according to the invention, it is not necessary to machine the end faces of the anchor rod elements 10, 11.
  • the front-side abutment surfaces 300 and the rear abutment surfaces 301 can be designed simply flat, so that the easy-to-produce planar end faces of the anchor rod elements 10, 11 can lie flat on one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP11152558.0A 2010-01-28 2011-01-28 Boulon d'ancrage auto-foreur doté d'un joint pour le boulon Withdrawn EP2354448A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00102/10A CH702595B1 (de) 2010-01-28 2010-01-28 Bohrankerdichtung und Selbstbohranker mit einer solchen Bohrankerdichtung.

Publications (2)

Publication Number Publication Date
EP2354448A2 true EP2354448A2 (fr) 2011-08-10
EP2354448A3 EP2354448A3 (fr) 2018-01-03

Family

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Application Number Title Priority Date Filing Date
EP11152558.0A Withdrawn EP2354448A3 (fr) 2010-01-28 2011-01-28 Boulon d'ancrage auto-foreur doté d'un joint pour le boulon

Country Status (2)

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EP (1) EP2354448A3 (fr)
CH (1) CH702595B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103741686A (zh) * 2014-01-21 2014-04-23 宁波鸿晨建设有限公司 用于施工一次成型的高压旋喷式土锚杆的钻头和施工方法
WO2016181219A1 (fr) * 2015-05-08 2016-11-17 Normet International Ltd. Boulon d'ancrage creux autoforeur ancré localement
CN107218071A (zh) * 2017-07-31 2017-09-29 中铁十七局集团第工程有限公司 可适用360°范围内中空锚杆快速注浆装置
CN107642328A (zh) * 2017-10-31 2018-01-30 滨州学院 一种高压喷射自振式全长粘结锚杆
WO2021198891A1 (fr) * 2020-03-31 2021-10-07 SERMENT, Paul Système de fondation sèche d'ancrage de structures

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640159A (zh) * 2016-10-31 2017-05-10 洛阳中岩工程材料有限公司 一种自钻式中空注浆锚杆用连接套密封结构

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910627A1 (de) 1989-04-01 1990-10-04 Ischebeck Friedrich Gmbh Verbindungselement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8906126U1 (de) * 1989-05-18 1990-04-19 Bergwerksverband Gmbh, 4300 Essen Injektionsrohr mit Ankerwirkung
DE9004177U1 (de) * 1990-04-11 1990-06-28 Bergwerksverband Gmbh, 4300 Essen Injektionsbohranker
DE9218785U1 (de) * 1992-06-24 1995-07-13 Friedr. Ischebeck Gmbh, 58256 Ennepetal Verbindungselement
DE4446625C1 (de) * 1994-12-24 1996-07-11 Reburg Patentverwertungs Gmbh Verpreßventil für einen Injektionsbohranker
AT9590U1 (de) * 2006-08-17 2007-12-15 Atlas Copco Mai Gmbh Reibrohranker und inflationsadapter für diesen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910627A1 (de) 1989-04-01 1990-10-04 Ischebeck Friedrich Gmbh Verbindungselement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103741686A (zh) * 2014-01-21 2014-04-23 宁波鸿晨建设有限公司 用于施工一次成型的高压旋喷式土锚杆的钻头和施工方法
WO2016181219A1 (fr) * 2015-05-08 2016-11-17 Normet International Ltd. Boulon d'ancrage creux autoforeur ancré localement
US9845678B2 (en) 2015-05-08 2017-12-19 Normet International Ltd. Locally anchored self-drilling hollow rock bolt
EA037677B1 (ru) * 2015-05-08 2021-04-29 Нормет Интернэшнэл Лтд. Локально-закрепляемый, саморезный, деформируемый, пустотелый анкерный болт и способ его установки
CN107218071A (zh) * 2017-07-31 2017-09-29 中铁十七局集团第工程有限公司 可适用360°范围内中空锚杆快速注浆装置
CN107642328A (zh) * 2017-10-31 2018-01-30 滨州学院 一种高压喷射自振式全长粘结锚杆
WO2021198891A1 (fr) * 2020-03-31 2021-10-07 SERMENT, Paul Système de fondation sèche d'ancrage de structures

Also Published As

Publication number Publication date
CH702595B1 (de) 2018-09-14
EP2354448A3 (fr) 2018-01-03
CH702595A2 (de) 2011-07-29

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