DE2755831A1 - INJECTION ANCHOR - Google Patents

Description

5600 WUPPERTAL 2 PATENT LAWYERS

STRESEMANNSTR. 6-8 DIPL.-ING. H. SONNET

P.O. Box 201327 DIPL.-ING. H. OSTRIGA

DIPL.-ING. B. SONNET 2755831

Applicant: Company International Intec

Company establishment

Vaduz / Liechtenstein

description of

Invention: Injection anchor

909825/0164

HAI Ύ IKt INK I: HRNSPRU HKR CKH) II u VOl Κ-.ΗΛΝΚ.-CmbH WJM SCHH KKl > \ IO ι ΛΙΜίΚΖΒΛΝΚ \ (.

pil »*« »■ llti.1 · ΜΊΐΙΊ.ΚΙ'ΛΙ. I! \ KMIN Ιϊλ-ι 1.SSlN 111 · -; 111> λ I I'PI K Ul H \ k Il N ιιι.ΙΙΗ.Μ

International Intec

Description :

The invention relates to an injection anchor according to the Preamble of claim 1. Such an injection anchor is essentially an anchoring bolt for insertion into a bore, mostly in rock is introduced. A curable adhesive, for example, is used as an injection compound, i.e. as a composite material a multi-component adhesive, or a cement mixture into consideration. After the injection compound has hardened the bolt is firmly integrated in the wall of the borehole.

Such injection anchors are known. The injection material is usually either via a central The length of the anchor body penetrating the injection channel (through hole) is conveyed into the deepest part of the borehole, or there are, the injection channel forming, separate pipes or tubes along the anchor body to the To be able to inject injection compound into the depth of the borehole. Known injection anchors of this type are cumbersome and expensive, especially in the case of a larger design Manufacturing. The introduction of the injection channels designed as through bores is also increasing Length problematic.

The object of the invention is to make available an injection anchor that is particularly simple due to Training is cheap to manufacture and allows universal use.

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An injection anchor according to the invention which achieves this object is set out in the characterizing part of claim 1 specified. The essential difference according to the invention from an injection anchor according to the prior art is there in that the injection channel does not consist of a channel that is closed on all sides, such as a small tube or through-hole, but rather partially through the outer surface the injection anchor and on the other hand is limited by the borehole wall itself. The injection anchor according to the invention thus forms the at least one injection channel between itself and the borehole wall. A peripheral injection channel is created with the direct involvement of the borehole. So fall on the one hand elaborate and expensive injection tubes or through-holes penetrating the injection anchor in the absence of any; the further advantage is also achieved that the injection material is already immediately behind the mouth of the borehole can be introduced into the borehole, so that an intimate mixing occurs when the injection compound is injected the injection compound with drill dust still remaining in the borehole, which increases the durability of the Injection anchor in the borehole wall can be increased considerably.

Since the injection channel according to the invention is part of the Is to be filled cavity between the anchor and the borehole wall, the injection compound can be more economical are used, as separate, only the filling serving cavities are not available. This possible saving injection compound can be used, especially in the case of such compounds made of expensive adhesives and / or large-

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voluminous injection anchors can be considerable.

The injection channel, starting in the vicinity of the borehole mouth, advantageously extends essentially over the entire axial length of the section of the injection anchor remaining in the borehole. To form this injection channel, the injection anchor is characterized by an at least partial, peripheral and axially extending deformation of its outer jacket that deviates from a circular cross-section. The injection channel can be formed by an axial groove or groove, which can be introduced, for example, by forging, pressing or also by chipping on the section of the injection anchor that plunges into the borehole. This section of the injection anchor that plunges into the borehole can, for example, have a full cross-section or a pipe cross-section. In the case of a tube that is not circular in cross-section, the deformation desired according to the invention for forming the injection channel does not have to be carried out separately, but rather is originally given by the shape of the tube. If, for example, an injection anchor with a section having the shape of a triangular tube in cross section is inserted into a borehole, three channels approximately crescent-shaped in cross section are formed between this section and the borehole wall. One or more of these crescent-shaped channels can be an injection channel, while the remaining channels can serve for the return flow of the injection compound. In the case of a tube with, for example, an elliptical or oval cross-section, two channels of the same shape result.

Even with a full cross-sectional injection anchor

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is the arrangement of several, appropriately designed identically, the channels delimiting longitudinal grooves advantageous. These longitudinal grooves can with respect to the anchor cross-section have a substantially concave curvature. The majority of these are used to form canals Groove formation also enables gradual backfilling of the between the one immersed in the borehole Section and the borehole wall formed cavities if separating or closing disks to break down these cavities be used, which divide the cavity into several chambers in the longitudinal direction of the bore. Ever according to the arrangement of Ü Durchgangsbohrs in these end or separating disks is an arbitrary control the flow of the injection compound through and into the individual iliac sectors.

Injection and return channels can, according to a further suggestion of the invention, also go through on the jacket of the injection anchor placed axially extending sealing strips be formed, wherein the sealing strips advantageously consist of U-rails firmly connected to the jacket and open against the wall of the borehole and in them elastic and / or plastic sealing profiles are embedded. Between each two adjacent in the circumferential direction Such a channel (injection or return flow channel) is formed with sealing strips. The arrangement of the sealing strips enables an effective closure of the individual channels even when the wall of the borehole has crumbled out.

liine further advantageous training in the borehole submerged section of the injection anchor

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in a sharp-edged formation of the borehole wall touching and the channels separating axially extending edges of the injection anchor. These sharp formation of the edges enables their penetration into the borehole wall and also leads to an effective one tight seal of the channels from each other for an advantageous centering and pre-fixing of the anchor in the borehole.

Further advantageous and expedient configurations of the injection anchor according to the invention are the subject matter of subclaims and also result from the following description of individual claims Drawings of illustrated embodiments of the invention. In the drawings, which do not claim to be true to scale for the sake of clear representation, demonstrate:

La shows an injection anchor inserted into a borehole according to a first embodiment in longitudinal section ,

Fig. 1b shows a cross section according to section line Ib-Ib in Fig. 1a,

2a shows an injecton anchor inserted into a borehole with a tubular! Section in longitudinal section,

Fig. 2b shows a cross section according to section line Hb-IIb in Fig. 2a,

3a shows another embodiment of a full cross-section

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the injection anchor in longitudinal section and seated in a borehole,

Fig. 3b shows a cross section according to section line IHb-IIIb in Fig. 3a,

4a shows an injection anchor according to the embodiment of FIGS. 3a, 3b for two-stage injection with a closure and Cutting discs,

4b, 4c, different designs of the cutting disc in section along line IVb, c-IVb, c in Fig. 4a,

4d, 4e show a cross section according to section line IVd, e-IVd, e in FIG. 4a,

5 shows a longitudinal section through an injection anchor inserted in the borehole according to a further embodiment,

6 shows an illustration of a further embodiment corresponding to FIG. 5,

7 shows an injection anchor reproduced in longitudinal section with adjustable immersion depth in the borehole,

8, 9 and 10 examples of further cross-sectional shapes of the injection anchor.

All of the injection anchors described below have one in the borehole in the exemplary embodiments an anchoring base V immersed section B and

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a threaded section G protruding from the borehole. The injection anchor 10 according to FIGS. 1a, 1b consists of a Vollmateria L; it can be a blacksmith anchor. The outer jacket 10a of its borehole section B. has an axially extending at one circumferential point over the entire section B immersed in the borehole 11 longitudinal groove 10b extending approximately concave in cross section. As can be seen in particular from Fig. 1b, this longitudinal groove 10b forms a channel 12 between itself and the borehole wall 11a. This channel 12 serves as Injection channel for filling in the injection compound. the Injection compound injected through the injection channel 12 after reaching the deepest hole 11b flows around the entire Outer jacket of the InjectLons anchor section B and thus fills the entire area between the injection anchor 10, Section B, and the borehole wall 11a located Cavity off. For pre-fixing and centering the injection anchor 10, in the area of the deepest part of the borehole 11b or in the area of the borehole mouth 11c sealing or sealing disks can be arranged, which are based on other exemplary embodiments to be described according to the invention, omitted in Fig. 1a for the sake of clarity have been.

An injection anchor 13 is shown in FIGS. 2a and 2b, the section of which dipping into the borehole 11 is formed from a square tube. This square tube is dimensioned so that the diagonal dimension D is equal to or slightly larger than the diameter of the borehole 11. The square section B is thus pre-fixed in the borehole 11 via its four corners. Between the outer jacket surfaces 13a and the borehole wall 11a four essentially sickle-shaped channels 12,12 'are formed, of which at least one (12) is used as an injection channel. In order to

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To prevent filling of the cavity 13b, the injection anchor is provided with a closure disk 14 in the deepest part of the borehole. To finish off to the outside, a further cover plate 15 is provided. This cover plate 15 has a bore 16 which enables the injection compound to be injected into the injection channel 12. At the bottom of the injection channel 12, a bore 17 is provided in the cover plate 14, which allows the injection compound to penetrate into the deepest part of the borehole 11b. The injection compound can now penetrate through further bores Igt _1S u into one or more of the three further channels 12 'as return flow channels. Whether each of these channels 12 'is assigned a corresponding bore 18 ″, 18 ″ in the cover plate 14 depends on the desired filling of the four cavities remaining between the injection anchor 13 and the borehole wall 11a. One or more bores 19 in the cover plate 15 serve as control opening (s) for the complete filling of one or more return flow channels 12 '.

The injection anchor 2ü according to FIGS. 3a, 3b is effective in principle with. the injection anchor 13 according to the figures 2a and 2b comparable; however, its section B, which dips into the borehole 11, does not consist of a piece of pipe, but from a full cross-sectional material, and its cross-section is roughly star-shaped for training of four injection and return flow channels 12, 12 '. The injection anchor 20 according to FIGS. 3a and 3b can, for example be a forging.

This injection anchor 20 is shown again in FIGS. 4a to 4e, with between the end disks

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14 and 15 a cutting disk 21 is also provided approximately in the middle. This separating disk 2 I divides the cavity formed between the injection anchor 20 and the borehole 11 into two heights 1 raumabschni tte 1 1 ti and lie. These sections 11d and 11 can be filled in stages and separately from one another, as can be seen from the following description. It is assumed that the opening 16 in the sealing disk 15 serves as an injection opening. Injection compound injected into it penetrates the injection channel section I2a and passes through a bore 22 in the separating disk 21 into the injection channel section 12b and from there through the bore 17 in the cover disk 14 into the deepest hole 11b. Further, depending on the arrangement of holes 18, 18 '! And 18 "(Fig. 4d, 4e) in the final bills ■ the injection mass of one or more of the channels 12b can now by backflow' are beffillt possesses, as in ^i;. Ig 4b is illustrated, the cutting disk 2 1 apart from the bore 22 no further bore, a V'er t'ü 1.1 ung essentially only in the section lie of the borehole 11 backs up Separating disk .. '■ further bores 22', 22 ", 22 '", then one obtains an additional filling of the section 1Ul. Through the mos. ¹ ! The various bores in the individual disks 14 and 2 1 can be arranged in a completely arbitrary manner and the individual cavities available in total can be filled in different ways. KS is also possible, not the closing and dividing disc !! 14, 2 1 to be provided with through holes, but di? to connect individual channels formed through bores 23 running transversely through the injection anchor, as this

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schematically in the rig. 4b to 4e is shown.

The injection anchor 25 according to FIG. 5 (upper half of the drawing) is provided in the borehole 11 by means of a collar Spreader ring 24 held. The expansion ring 24 has an inner conical jacket surface 24 a, which with an outer conical lateral surface 25a of the armature 25 cooperates. In the plane of the drawing, the expanding ring 24 has one Slot 24b, which allows its diameter change and thus the clamping effect. The cross-sectional shape of the borehole 11 immersed portion B of the injection anchor is substantially within the scope of the present invention any. With regard to the invention, the formation of an injection channel 12, which is essentially extends over at least approximately the entire immersion length. To the injection compound in these To introduce injection channel 12, a filling hole 26 is provided in the center, which the threaded pin G of the injection anchor 25 and is connected to the injection channel 12 in the vicinity of the borehole mouth 11c through a transverse bore 27.

The one shown in Fig. T> (lower half of the drawing) Injection anchor 25 'differs from that in FIG. 5 (upper half of the drawing) shown injection anchor in that the central filling hole 26 through a peripheral Filling groove 28, which can be produced for example by means of a side milling cutter, is replaced. For filling with injection compound is over the threaded pin G and A piece of hose 29 is slipped over the filling groove 28. As a securing member to hold the injection anchor 25 * in

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the borehole 11 is in turn used by an expansion ring 30, which is shown here in contrast to the expansion ring 24 is not shown as an expansion ring provided with a collar. It goes without saying that the formation of the expansion rings 24 and 30 can be independent of the shape of the injection anchor concerned.

Fig. 7 illustrates an injection anchor 31 in essentially any cross-sectional shape, its immersion depth into the borehole 11 by means of a screw ring 32 which is screwed onto the threaded section G. can be. This allows the free usable length of the threaded section G and the immersion depth of the Define section B. The filling with injection compound happens via a thread section G penetrating central filling bore 33 which opens into a transverse bore 34 opening into the injection channel 12. This cross estuary Adjacent is a separating disk 35, which enables the filling of sections between the injection anchor 31 and the borehole 11 formed cavity. The emerging from the bore 34 and in the direction of Injection compound flowing deepest in the borehole 11b penetrates through a borehole 36 of an inner closure disk 14 into the deepest borehole 11b and flows back through further bores 37/38 and via one or more return flow channels 12 'through bores 39 and / or 40 in the separating disk 35 into the front cavity section 11e, which is filled secondarily and subsequently.

FIGS. 8, 9 and 10 show further cross-sectional configurations of the sections immersed in the borehole of injection anchors. The cross section according to FIG. 8 has

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six peripheral, axially extending indentations 41, with which, for example, a three-stage injection is possible. The outer edges 45 of this injection anchor 46 are clearly sharp-edged. They serve an improved hold and an improved centering of the injection anchor 46 in the borehole 11. On the other hand, they can claw into the borehole wall 11a, so that the individual channels 12, 12 ^{1 are} well delimited from one another.

9 shows a further tubular cross section of an injection anchor 4 7 with an approximately oval shape. here two channels 12 are formed between the wall of the injection anchor 4 7 and the borehole wall 11a.

Fig. 10 shows a tubular injection anchor applied to the outer surface 42a of U-shaped rails 43, for example, are dotted, in which elastic or plastic sealing profiles 44 are embedded. These effect, thanks to their resilience, a particularly exact separation of the individual channels 12 from one another, even with very uneven borehole wall 11a. Instead of the illustrated circular pipe cross-section of the armature 42 can of course For example, a rectangular, square or multi-surface cross-section can also be used.

All the illustrated and described exemplary embodiments are not limited to those in the individual figures the combinations shown. Combinations of features of the various exemplary embodiments with one another are also possible within the meaning of the invention.

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In no way is the invention limited to the ones shown Cross-sectional shapes of the injection anchor are limited. The goal Cross-sectional shapes of the invention are extremely numerous and the cross-sectional configuration of that used Anchors almost arbitrarily. Should be ensured in the sense of the invention that the injection channel has no intrinsic, i. is closed by parts of the anchor channel, but that to form the injection channel parts of the borehole wall can be used. Another essential feature of the invention is that the injection channels formed in this way extend over the greatest possible axial length of the injection port should extend so that they should begin in relatively close association with the borehole mouth and end in the deepest part of the borehole.

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Claims (1)

International Intec A η s ρ r ii c Ii e 1. Injection anchor with at least one injection kaiial ·: to fill in a hardenable, the injection anchor Injection compound adhering to the wall of the borehole, marked by dadurcli, that the injection channel (12) on the one hand from parts of the outer surface of the injection anchor (10.13 ο ^ 25 25 ' 31,42,4 (1.47) and on the other hand is formed by these adjacent zones of the borehole wall (11a). 2. Injection anchor according to claim 1, characterized in that that the injection channel (12), beginning in the vicinity of the Bohrlochmünduiig (Mc), essentially over the entire axial length of the section (B) of the injection anchor (10ff) remaining in the borehole. 3. Injection anchor according to claim 1 or 2, characterized by an at least partial, peripheral and Axial deformation of the outer jacket of the injection anchor that deviates from a circular cross-section (10ffj. 4. Injection anchor according to claim 3, characterized by a substantially concave cross-section Course dc-s delimiting the injection channel (12) Wall part of the injection anchor (1Π, 20,25,25 ', 31,46) 5. Injection anchor according to claim 3, characterized by a substantially secant-like cross section Course of the wall bounding the injection channel (12) 909825/0164 International Intec part of the injection anchor (13.47). (). Injection anchor according to claim 1 or one of the following, characterized by a plurality of preferred Deformation sections arranged at regular intervals and designed identically to one another, at least one of which delimits an injection channel (12). 7. Injection anchor according to claim 1 or one of the following, characterized by sharp-edged training the axially extending edges (45) of the injection anchor that touch the borehole wall and separate the channels from one another (4 ()). 8. Injection anchor according to claim 1 or one of the following, characterized by at least indirect connection at least two channels (12, 12 ') each with one another. 9. Injection anchor according to claim 8, characterized by connecting two channels (12, 12 ') each by means of a transverse bore (23). 10. Injection anchor according to claim 8, characterized by separating or closing disks arranged in any axial points of the injection anchor (10ff) (14,15,21,35) arranged, essentially axially extending Overhead contact holes (17,18,22,37,38,39,40). 11. Injection anchor according to claim 1 or one of the following, characterized by on the jacket of the Injek- 9.0 9825 / om International Intec tion anchor (42) attached axially extending sealing strips (43.44). 12. Injection anchor according to claim 11, characterized in that that the sealing strips (43,44) are firmly connected to the jacket, e.g. welded, against the wall of the borehole There are open U-rails (43) and elastic and / or plastic sealing profiles (44) are embedded in them are. 13. Injection anchor according to claim 1 or one of the following, characterized by at least full cross-section its section (B) which dips into the borehole (11). 14. Injection anchor according to claim 1 or one of the following, characterized by a pipe cross-section at least its section (B) which dips into the borehole (11). 15. Injection anchor according to claim 1 or one of the following, in particular with an at least partially threaded section (G) emerging from the borehole (1ΪΙ), characterized by a substantially along a surface line of the threaded portion (G) extending into the peripheral injection channel (12) opening filling groove (28). 16. Injection anchor according to claim 1 or one of the following, characterized in that a one-sided slotted Clamping ring (24; 30) for fixing the injection anchor (25, 25 ') in the borehole (11) in the area of its mouth (11c) is provided. 17. Injection anchor according to claim 1 or one of the 909825/0164 International Intec following, characterized in that the threaded portion (G) with an essentially central filling hole (26) is provided, which opens in the vicinity of the borehole mouth (11c) via a transverse bore (27) in the injection channel (12). 18. Injection anchor according to claim 1 or one of the following, characterized in that the from the borehole (11) exiting free length of the threaded section (G) through a on the wall or in the mouth area (lic) adjustable in the borehole (11) supporting screw ring (32) is. 19. Injection anchor according to claim 1 or one of the following, characterized in that the entire Injektionsiiker from a shortened section of a rod material profiled in accordance with the peripheral channel formations is obtained, the end and partition disks (14,15,21,55) and optionally a threaded connector (G) and optionally a filling groove (28) in the Ways of cold or hot forming (non-cutting and / or cutting) are attached or molded. 909825/0164