EP2087203A1 - Verbesserter gleitanker - Google Patents
Verbesserter gleitankerInfo
- Publication number
- EP2087203A1 EP2087203A1 EP07819726A EP07819726A EP2087203A1 EP 2087203 A1 EP2087203 A1 EP 2087203A1 EP 07819726 A EP07819726 A EP 07819726A EP 07819726 A EP07819726 A EP 07819726A EP 2087203 A1 EP2087203 A1 EP 2087203A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sliding
- anchor
- anchor rod
- bore
- control element
- 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
- 230000001681 protective effect Effects 0.000 claims description 25
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000012806 monitoring device Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 description 18
- 239000000463 material Substances 0.000 description 9
- 239000004570 mortar (masonry) Substances 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000004840 adhesive resin Substances 0.000 description 3
- 229920006223 adhesive resin Polymers 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
-
- 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
- E21D21/008—Anchoring or tensioning means
-
- 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
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
Definitions
- the invention relates to a sliding anchor for insertion into a bore, wherein the sliding anchor has an anchor rod on which a sliding control element is arranged with a through hole through which the anchor rod extends, and wherein the sliding control element has a sliding body cage with at least one recess for receiving a in Contact with the lateral surface of the anchor rod standing » lo comprises sliding body.
- a sliding anchor is known from WO 2006/034208 Al.
- Sliding anchors belong to the group of so-called mountain anchors. Mountain anchors are used in mining, tunneling and foundation engineering to stabilize the wall of a tunnel or i5 tunnel. For this purpose, a hole in the rock is driven from the tunnel or tunnel, the length of which is usually between two and twelve meters. In this hole then a rock bolt of appropriate length is introduced, the end region is permanently secured by mortar, with special resin adhesives or by mechanical splaying in the hole. On the
- slidable anchors have been developed that give defined when exceeding a predetermined load, i. which can increase their length within certain limits in order to reduce a stress acting in the rock to a level which is of
- the force at which the sliding anchor defines yielding can be adjusted as accurately as possible and also during the yielding as little as possible fluctuates in order to enable on the one hand an exact structural design of the rock anchor and on the other hand to be able to realize as good as possible a predictable behavior during operation.
- the so-called breakaway force, so the force from which exceeds the sliding anchors defines yielding be repeatable, so that the load of the sliding anchor during different, time apart phases of such a defined yielding does not change uncontrollably.
- the invention has set itself the task of providing an improved in this respect Gleitanker.
- this object is achieved in that each recess for receiving a slider in Gleit Economics hofig is arranged tangentially to the lateral surface of the anchor rod, further that the Mantelhüll Chemistry each recess protrudes a predefined measure in the free cross section of the through hole , And that finally each slider fills the cross section of him zugeordneis th recess.
- Anchor rod is in the present case meant no exact tangency in the mathematical sense, in which the mantle envelope surface of the recess would affect only the lateral surface of the anchor rod, but it is meant a substantially tangential arrangement of certain recesses for receiving sliding bodies with respect to the lateral surface of the anchor rod at where the central longitudinal axis of each recess is arranged askew to the central longitudinal axis of the anchor rod, wherein in a projection of the central longitudinal axis of the anchor rod and the central longitudinal axis of an arbitrary recess for receiving a sliding body these two axes can be orthogonal to one another but need not Accordingly, to accommodate a slider can lie in a plane which intersects the central longitudinal axis of the anchor rod at right angles (then the axes in question in the projection described are orthogonal to each other), they can a Be also in an oblique to the central longitudinal axis of the tie rod plane.
- the inventive design of a sliding anchor has a number of advantages.
- the sliding anchor according to the invention already works with a recess and a sliding body arranged therein.
- the sliding anchor according to the invention already works with a recess and a sliding body arranged therein.
- the sliding anchor according to the invention already works with a recess and a sliding body arranged therein.
- Slider cage however, a plurality of recesses arranged, which are advantageously distributed around the circumference of the anchor rod around, in particular evenly distributed around the circumference.
- the desired breakaway force can be adjusted more precisely, 25 also can be realized with multiple recesses and sliding bodies arranged therein in a simple way higher clamping or breakaway forces.
- a uniform distribution of the recesses and sliding bodies around the circumference of the anchor rod distributes the loads acting on the anchor rod more uniformly.
- Each of the plurality of recesses may be arranged in the sliding body cage at a different level, ie in a respective separate cross-sectional plane of the sliding body cage.
- a plurality of recesses are preferably arranged in a cross-sectional plane of the sliding body cage.
- the number of recesses possible in a cross-sectional plane depends on the dimension of the recesses and the dimension of the sliding body cage.
- three recesses are arranged in a cross-sectional plane, however, it may also be more than three such recesses in a larger sized sliding anchor with a correspondingly larger sliding control.
- a plurality of recesses in groups in different cross-sectional planes of the slider cage, also from the viewpoint of achieving a compact structure and even load distribution.
- Such a configuration is preferably selected when the spatial relationships do not allow an arrangement of the desired number of recesses in a cross-sectional plane.
- ⁇ lo sliding bolt in each case three recesses arranged in two different cross-sectional planes of the sliding body cage.
- the recesses of the different cross-sectional planes are advantageously angularly offset relative to one another such that the sliding bodies arranged in the recesses of one cross-sectional plane contact other regions of the lateral surface of the anchor rod than the sliding bodies present in the i5 or the other cross-sectional planes.
- the shape of the sliding body used can be chosen almost arbitrarily.
- the sliders may be spherical or may have a tapered outer shape, e.g. tapered roller
- the sliders have a circular cylindrical shape, so are roll-shaped.
- the lateral surface of each slider can be cambered, i. bulged outwards, e.g. in the manner of a wine barrel.
- prismatic sliding body are possible. It is understood that the shape of the recesses adapted to the sliding bodies used at least as far
- each slider is received in its recess essentially free of play.
- the shape of the recess will correspond to the shape of the slider used, i. a circular cylindrical slider will be arranged in a circular cylindrical recess, a conical slider in a conical recess, etc., but this match is not mandatory.
- the sliding anchor there are two basic possibilities for the arrangement of the sliding control element.
- One option is to place the slide control on a portion of the anchor rod intended for insertion into the bore.
- the maximum sliding distance of the sliding anchor is then the distance by which the anchor rod extends beyond the sliding control element into the bore.
- the anchor rod does not come off the sliding control when passing through the maximum sliding distance has been, in preferred embodiments in the region of the bore-side end of the anchor rod, a stop element is present, whose diameter is greater than the diameter of the passage opening in the sliding control.
- the anchor rod can not slip through the sliding control.
- the stopper is screwed onto the bore-side end portion of the anchor rod or otherwise fastened nut.
- the stop element strikes after passing through the maximum possible Gleitweges on the sliding control, another defined yielding of the sliding armature is no longer possible.
- the sliding anchor can then be loaded up to its breaking load resulting from the design ⁇ lo interpretation and will fail after exceeding the same, for example, then the anchor rod will tear.
- a first protective tube concentrically surrounding the tie rod extends from the sliding control element to the bore-side end of the anchor rod.
- the anchor rod concentrically surrounding the first protective tube but is also advantageous if the sliding anchor is clamped by means of spreading, for example using an expansion sleeve in the hole, because the protective tube also holds loose rock formations
- the outer diameter corresponds of the first protective tube substantially to the outer diameter of the sliding control element, so that, starting at the bore-side end of the sliding anchor, an at least approximately uniform outside diameter results, which facilitates insertion of the sliding anchor into the bore.
- Gleitankers lo are provided with a second, the anchor rod concentrically surrounding protective tube extending from the anchor plate already mentioned , which closes the bore mouth, extends a little way into the bore.
- a second protective tube can be fixedly connected to the anchor plate, for example by welding or screwing or by a one-piece embodiment with the anchor plate.
- preferred embodiments have a third, the anchor rod concentrically surrounding protective tube, which may for example consist of plastic and the sliding control a piece in the direction of from Bore protruding end of the anchor rod extends, ie towards the bore mouth.
- the third protection tube can also be formed by a shrink tube or merely a coating, which is applied to the portion of the anchor rod to be protected.
- Gleitankers are provided with a monitoring device. This may consist, for example, of a monitoring wire in a simple form, which is stretched by the sliding control element as far as the anchor plate and preferably from the outside of the anchor plate, ie the side of the anchor plate facing away from the bore. plate is accessible.
- the monitoring wire may be made of metal or plastic or it may be a thread or the like.
- a mixing element is attached.
- the two components are usually introduced into the bore in the form of adhesive cartridges, in which the two components are accommodated, for example, in two mutually concentric chambers separated from one another.
- the mixing element can also serve as the stop element already mentioned above.
- FIG. 1 shows a plan view of a preferred exemplary embodiment of a sliding anchor according to the invention
- FIG. 2 shows a first embodiment of a sliding body cage, as used in a sliding control element of a sliding anchor according to the invention
- FIG. 4 shows a second exemplary embodiment of a sliding body cage, as used in the sliding control element of the sliding anchor shown in FIG. 1,
- FIG. 6 shows the section VI-VI from FIG. 4,
- Figure 7 is a view corresponding to Figure 5, but with inserted into the Gleit Economics sakefig sliders, and
- Figure 8 is a view corresponding to Figure 6, also with inserted into the Gleit Economics sakefig sliders.
- a sliding anchor generally designated 10
- the central element of this sliding anchor 10 is an anchor rod 12, which represents the load-bearing component of the sliding anchor 10 and whose length determines the length of the sliding anchor 10.
- the anchor rod 12 is a solid, continuous steel rod with a circular cross-section and a diameter of 12 mm and smoother
- the diameter of the anchor rod 12 may be smaller or greater than 12 mm, and also its length may be shorter or longer than previously specified, depending on the conditions of use.
- the lateral surface of the anchor rod 12 does not have to be smooth, but can be roughened, grooved, etc., for example.
- anchor rods of circular cross-section are preferred, the invention is not limited thereto, the cross-section of the anchor rod may also be square, polygonal, etc., for example.
- the sliding control element 14 serves a limited longitudinal displacement of the anchor rod 12 allow relative to the sliding control element 14, so that the sliding anchor 10 can cope better occurring rock movements occurring after its setting and does not prematurely fail.
- the sliding control element 14 has a circular cylindrical Gleit Economics sakefig 16 with a central, axially extending through hole 18, which is slightly stepped in the example shown and extends through which in the assembled state of the sliding anchor 10 of the anchor rod 12.
- three recesses 20 are formed uniformly around the circumference of the sliding body cage 16 in the form of circular-cylindrical bores which are arranged such that their jacket enveloping surface projects slightly into the free cross section of the through-opening 18.
- a measure X which defines the distance between the center M of the through-hole 18 and the central longitudinal axis of each recess 20, is slightly smaller than the sum of the radius R of the through-hole 18 and the radius r of the recess 20.
- the recesses 20 are arranged substantially tangentially to the lateral surface of the anchor rod 12, i. their central longitudinal axes are skewed to the central longitudinal axis of the through hole 18 and are with respect to a projection containing the central longitudinal axis of the through hole 18 and the central longitudinal axis of each recess 20, orthogonal to the central longitudinal axis of the through hole 18th Die
- FIGS. 4 to 6 show a second exemplary embodiment of a sliding body cage 16 'whose basic construction corresponds to the sliding body cage 16.
- the Gleit analysesrithlafig 16 ' In contrast to the Gleit analyses sakefig 16, the Gleit analysesrithhimfig 16 ', however, two übereinan- 5 of the arranged planes, each with three recesses 20, wherein the
- Recesses 20 of a cross-sectional plane are offset to the recesses 20 of the other cross-sectional plane in the circumferential direction so that all six recesses 20 are uniformly distributed together around the circumference of the Gleit stresses Kofigs 16 '.
- Each recess 20 is provided for receiving a here circular cylindrical slider 22 whose outer diameter matches up to usual tolerances with the diameter of the recess 20, so that completely fills the cross section of the recess 20.
- FIGS. 7 and 8 show views corresponding to FIGS. 5 and 6, in which a sliding body 22 designed as described above is arranged in each recess 20. As can be clearly seen in particular from FIG. 7, due to the described arrangement of the recesses 20, each sliding body 22 projects with its lateral surface into the cross section of the passage opening 18. In this way, the anchor rod 12, whose outer diameter
- the 30 embodiment has substantially the same outer diameter as the Gleit Economics tanninfig 16 ', serves to keep that mass (mortar, adhesive) from the surface of the anchor rod 12, with which the sliding anchor 10 is permanently anchored in the bore, not shown.
- the first protective tube 24 thus provides on a bore-side end portion of the sliding anchor 10 is a circular cylindrical
- the tip of the slide anchor 10 forms a mixing element 26, secured to the bore-side end of the anchor rod 12, with a plurality of mixing vanes 28 which serves to intimately mix common two-component adhesives used to define rock bolts inserted into the bore prior to setting an anchor ,
- the anchor rod 12 is rotated after insertion into the bore, whereby the mixing element 26 is rotated.
- the outer diameter of the mixing element 26 is greater than the diameter of the through hole 18 in the sliding body cage 16 or 16 '.
- the mixing element 26 simultaneously acts as a stop element on the end portion of the anchor rod 12, which prevents the anchor rod 12 can be pulled out of the sliding control element 14.
- a stop element may also be designed as a threaded nut or simply be formed by a thickening of the anchor rod 12 i5, which is produced for example by a compression of the anchor rod.
- a load-transmitting armature plate 30 is provided, which is placed on the bore-input-side end of the anchor rod 12. 20
- This anchor plate 30, which is usually also made of steel and is usually square, is secured with a lock nut 32 on the anchor rod 12.
- a second, fixedly connected to the anchor plate 30 and here also made of steel existing second protective tube 34 extends
- the inner diameter of the second protective tube 34 is larger than the outer diameter of the anchor rod 12 is selected.
- the outer diameter of the second protective tube 34 is significantly smaller than the outer diameter of the first protective tube 24 in order to prevent it from being introduced into the bore.
- a central portion of the anchor rod 12 is concentrically surrounded by a third protective tube 36, which extends from the sliding control element 14 in the direction of the anchor plate 30.
- This third protective tube 36 serves to keep unwanted influences from the surface of the anchor rod 12, in particular to prevent sticking of the anchor rod in this area.
- the sliding anchor 10 shown is held in particular by a plug in the bore, which is formed by a material displacement of the adhesive or mortar used behind the slide control 14, ie on the side of the wellbore and after curing of the material pulling out the armature 10 from the bore prevented. After placing the anchor plate 30 and tightening the same by means of the lock nut 32, the sliding anchor 10 can then fulfill its load-bearing, stabilizing function.
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)
- Joining Of Building Structures In Genera (AREA)
- Piles And Underground Anchors (AREA)
- Bridges Or Land Bridges (AREA)
- Dowels (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200730209T SI2087203T1 (sl) | 2006-11-10 | 2007-11-09 | Izboljšano drsno sidro |
PL07819726T PL2087203T3 (pl) | 2006-11-10 | 2007-11-09 | Udoskonalona kotwa poślizgowa |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006053141A DE102006053141B3 (de) | 2006-11-10 | 2006-11-10 | Verbesserter Gleitanker |
PCT/EP2007/009733 WO2008055696A1 (de) | 2006-11-10 | 2007-11-09 | Verbesserter gleitanker |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2087203A1 true EP2087203A1 (de) | 2009-08-12 |
EP2087203B1 EP2087203B1 (de) | 2010-01-13 |
Family
ID=39047554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07819726A Active EP2087203B1 (de) | 2006-11-10 | 2007-11-09 | Verbesserter gleitanker |
Country Status (28)
Country | Link |
---|---|
US (1) | US7955034B2 (de) |
EP (1) | EP2087203B1 (de) |
JP (1) | JP4741703B2 (de) |
KR (1) | KR101088500B1 (de) |
CN (1) | CN101506468B (de) |
AT (1) | ATE455235T1 (de) |
AU (1) | AU2007316905B2 (de) |
BR (1) | BRPI0716667A2 (de) |
CA (1) | CA2660496C (de) |
CL (1) | CL2007003140A1 (de) |
CY (1) | CY2200166T2 (de) |
DE (2) | DE102006053141B3 (de) |
DK (1) | DK2087203T3 (de) |
ES (1) | ES2328663T3 (de) |
HK (1) | HK1131649A1 (de) |
HR (1) | HRP20100084T1 (de) |
IL (1) | IL197263A (de) |
ME (1) | MEP6409A (de) |
MX (1) | MX2009004927A (de) |
NO (1) | NO20091918L (de) |
PE (1) | PE20081143A1 (de) |
PL (1) | PL2087203T3 (de) |
PT (1) | PT2087203E (de) |
RS (1) | RS51267B (de) |
RU (1) | RU2410541C2 (de) |
SI (1) | SI2087203T1 (de) |
WO (1) | WO2008055696A1 (de) |
ZA (1) | ZA200900972B (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PE20060665A1 (es) | 2004-09-20 | 2006-07-19 | Atlas Copco Mai Gmbh | Perno para roca con flexion regulable |
DE102006053141B3 (de) | 2006-11-10 | 2008-06-19 | Atlas Copco Mai Gmbh | Verbesserter Gleitanker |
EP2247827B1 (de) * | 2008-02-29 | 2011-08-31 | Atlas Copco Mai GmbH | Verbesserter gleitanker |
WO2010009506A1 (en) * | 2008-07-25 | 2010-01-28 | Garford Pty Ltd | A method of encasing a yielding rock bolt shaft |
DE102010063098A1 (de) * | 2010-12-15 | 2012-02-16 | Hilti Aktiengesellschaft | Gesteinsanker |
DE102012201662A1 (de) * | 2012-02-06 | 2013-08-08 | Hilti Aktiengesellschaft | Setzwerkzeug und Verfahren zur Montage einer Ankerstange |
SE538335C2 (sv) * | 2014-09-25 | 2016-05-24 | Northern Mining Products Ab | Energiupptagande bergbult för ingjutning samt förfarande förtillverkning av en sådan bergbult |
NO340229B1 (no) * | 2014-11-10 | 2017-03-20 | Interwell Technology As | En brønnverktøyinnretning for anvendelse i en olje- og/eller gassbrønn |
WO2017119145A1 (ja) * | 2016-01-06 | 2017-07-13 | 鹿島建設株式会社 | ロックボルト |
CN108150209A (zh) * | 2018-01-28 | 2018-06-12 | 大连海事大学 | 一种适用于防护及测量隧道稳定性的智能锚杆 |
CN112610256B (zh) * | 2020-12-24 | 2024-08-27 | 中铁二院工程集团有限责任公司 | 一种自钻式让压中空锚杆及锚固方法 |
CN114000899B (zh) * | 2021-09-29 | 2024-04-12 | 华北水利水电大学 | 一种多功能及智能监测锚杆装置 |
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2006
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- 2007-11-09 BR BRPI0716667-2A2A patent/BRPI0716667A2/pt not_active IP Right Cessation
- 2007-11-09 KR KR1020097003454A patent/KR101088500B1/ko not_active IP Right Cessation
- 2007-11-09 AU AU2007316905A patent/AU2007316905B2/en not_active Ceased
- 2007-11-09 ES ES07819726T patent/ES2328663T3/es active Active
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