• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE534165C2
    申请号:SE0950263
    申请日:2009-04-22
    公开日:2011-05-17
    发明作者:Mads Karlsen；Even A Karlsen
    申请人:Pretec As；
    IPC主号:
    专利说明:

    With the rotation, the polyester is blended until it settles. In this solution, the bolt must be held in place by hand until the mass has solidified.
    By NO 319141 a method and a device are previously known for securing rock with end-anchored bolts. In this solution, a hardening fl component component is used, such as thermosetting plastic in the form of polyester, where the thermosetting plastic is pumped into the hole from an assembly, after which a bolt is inserted into the filled borehole. The bolt must then be held in place until the mass has hardened sufficiently to be held in place.
    The Norwegian patent application NO 20066000 discloses a method for providing a rock bolt previously known, in which a rock bolt with a tubular bolt part with a closed cross section is inserted and expanded for bearing contact in a borehole in a rock structure.
    NO 162780 describes a rock bolt of a tubular material and an expansion sleeve screwed onto the inner end of the bolt, intended to be inserted into a hole in the rock, whereby a hardening mass is injected into the space between the bolt and the rock. The bolt is provided with an element that prevents ejection of injected material before the hardening is complete.
    With such solutions, there is a need to ensure that the bolt does not inadvertently come out of the hole and that the bolt remains centered until the curing mass has completely cured, while at the same time wishing to secure access to the entire annular space around the bolt to ensure complete filling the entire volume of the annular space.
    DISCLOSURE OF THE INVENTION An object of the invention is to provide a solution which easily and safely, without the use of tools and without any special hand force, can ensure correct positioning and temporary holding of the bolt in the hole in the rock until the expanded mass has hardened. Another object of the invention is to provide a solution which at all times ensures the desired centering of a bolt in a rock hole.
    A further object of the invention is to provide a solution which is very cheap to manufacture and where the assembly process is simplified, at the same time as the solution is suitable for use in connection with a threaded rod. Yet another object of the invention is to provide a solution which provides sufficient holding force before or after insertion of the bolt into the hole until the mass has solidified, so that the bolt is prevented from being moved out of the hole during this phase of assembly. Yet another object of the solution according to the invention is to provide a solution which provides sufficient holding even in holes which are oval, or in holes of varying diameter or in holes which are slightly larger than planned.
    According to the invention, these objects are achieved by a solution which is further defined in the independent patent claim, while embodiments are the specified dependent claims.
    According to the invention, there is provided a device for centering bolts intended to be inserted into holes drilled in rock or the like, to secure or hold a bolt intended to be anchored in the rock by means of a solidifying or hardening mass. The device comprises an elongate, axially hollow clip with an axial gap extending in the entire longitudinal direction of the clip. Clips are made of a material with built-in elasticity, so that the clip can be snapped onto the bolt, and are provided on their inner surface with inwardly extending devices intended to cooperate with profiles on the bolt for locking to the bolt. The clipset is further provided on its outside with one or more of its outwardly directed fin-like devices. The novelty and feature of the invention is that said at least one outwardly directed fin-like device is configured so that said at least one outwardly directed fin can be bent away upon insertion into the hole, so that said at least one outwardly directed fin-like device exerts an outwardly directed holding force against the surrounding rock. The outwardly directed fin-like devices may preferably be in the form of fins located in a plane oriented perpendicular to the longitudinal axis of the clip.
    Alternatively, they may be inclined or in the form of a helical fin (s) extending along the main body of the clip.
    According to the invention, the fins can preferably be arranged at the two ends of the clip, where the fins which are arranged at one end are located in the same plane.
    Furthermore, it may be advantageous to use three fins at each end.
    According to one embodiment, one fin can be arranged at the axis of symmetry of the clip, while the other two can be arranged on each side of the opening gap.
    In addition, the fins on each side of the opening gap may preferably be displaced laterally relative to an axis through the center axis of the clip perpendicular to the axis of symmetry of the clip, where the displacement is in the direction of the gap opening. In that case it is advantageous that the side edges of the fins are placed parallel to said center axis.
    According to a further embodiment of the invention, the thickness of the fins can preferably decrease towards the tips of the fins and that the fins have such a thickness that they can be bent.
    According to yet another embodiment of the invention, the inner surface of the clip may be formed with threads which are intended to cooperate with threads on a threaded steel in order to be able to lock the clip against displacement in the axial direction after mounting, other than by means of screwing.
    With the design and choice of material, the solution according to the invention has produced a solution that is simple to manufacture and easy to assemble without much manual force. Since the fins are made thin and with decreasing thickness in the direction of the free ends of the fins, a solution has also been obtained which bends easily and shapes itself after the hole upon insertion. Since the fins will then bend backwards towards the opening of the hole, a solution has been provided which cannot easily fall or be moved out of the hole, even if the hole should be oval or have a slightly larger diameter is originally planned. 10 15 20 25 534 'H55 The design of profiles, for example in the form of threads, on the inner clip prevents slippage axially after the clip has been snapped onto the bolt, unless the clip is screwed.
    DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with reference to the drawings which describe an embodiment of the invention, in which: , and also showing an insulating foam plate for frost protection; Figure 2 shows an enlarged detail marked detail A in Figure 1; Figure 3 shows an enlarged and very simplified single hole, provided with a securing bolt and centering clips, assembled and fully injected; Figure 4 shows a vertical section through a centering clip according to the present invention, seen through the section A-A in Figure 5; Figure 5 shows a plan view of a centering clip according to the invention, and Figure 6 shows a vertical view of a centering clip, seen from a diametrically opposite side relative to the opening gap of the centering clip.
    DESCRIPTION OF EMBODIMENTS Figure 1 schematically shows a vertical section through a rock wall 10. where a tunnel 11 is blasted out and internally clad with concrete elements 23 which are anchored to the rock wall by means of long bolts 24. In addition, the arches of the tunnel 11 are covered with plates 26 of a insulating materials, such as PE foam. Said concrete slabs 23 and insulation slabs are installed to secure the tunnel 11 against water penetration and frost. The plates 10 15 20 25 534 165 26 are anchored to the arches of the tunnel 11 by means of water and frost protection bolts 12 according to the invention. The bolts 12 are arranged in holes 13 which are drilled in the rock 10. After insertion of the bolts 12, mortar or some other hardening mass is pressed into the annular space around the bolts to ensure adhesion between the bolts 12 and the rock 10. The number of holes 13 with bolts 12 and the length of the bolts 12 and the holes 13 depend, among other things, on the width and length of the tunnel. Alternatively, the hole 13 may be filled before insertion of the bolt 12. In that case, the hole may, for example, be filled to% with a solidifying material.
    Figure 2 shows in magnification a detail A shown in Figure 1. As can be seen from the clock, a plate 26 of an insulating material is suspended in the roof of the tunnel by means of threaded bolts 12. The bolts are fastened to the rock 10 via holes (not shown in Figure 2), while the surrounding space between bolt 12 and hole 13 is injected with a hardening material. To hang the plate 26, two, preferably cup-shaped discs 25 are used, which are screwed onto one end of the bolt. Said discs 25 are located on each side of the insulating plate 26. In connection with the disc 25 which lies against the rock 10, a seal can be arranged on the bolt 12, so that water which would come down along the bolt 12 is not allowed to penetrate into the plate. 26, but drains along the inner surface of the plate 26. A nut 16 is provided on each of the sides of the discs 25 facing away from the insulating plate 26, one of the nuts 16 acting as a stop for the inner disc 25, while the other nut 16 is located on the outside of the insulating plate 26. The insulating plates are often made of a combustible material. The plates 26 can in that case be covered by a protective layer 27, for example of shotcrete.
    Figure 3 shows an enlarged section of a hole A, shown in Figure 1, As shown in Figure 3, a bolt 12 is inserted into a hole 12, drilled in the rock 10 in a tunnel roof. To center the bolts and to hold them in the hole 13, so that the bolt 12 remains in the middle of the hole, two centering clips 14 which have been injected into the hole 13 with a suitable material, such as mortar, are used. , polyester or the like.
    As shown in Figure 3, the clip has outwardly directed fins or wings 19, where the clip 14 with outwardly directed fins 19 has a greater lateral extent is the diameter of the hole 13, the fins 19 bending backwards upon insertion and in this way exerting a holding force against the rock 10 to thereby securing both centering and preventing slipping out of the hole. For this purpose, the clip 14 is made of a material with a certain built-in elasticity or flexibility, while at the same time making the fins thin enough to bend sufficiently.
    Figure 4 shows a vertical section through a spacing and centering clip according to the present invention. The clip 14 is formed with an elongate, hollow, cylindrical body 17 which is made of a material with resilient properties, so that the clip 14 can be snapped onto the securing bolt 12 before insertion thereof into the hole 13 in the rock 10. As shown in Figure 5, the body is 17 for this purpose is provided with a vertical opening 18 of constant width which extends along the entire length of the clip 14. The gap opening of the clip 14 is smaller than the diameter of the clip 14.
    At each end of the clip 14, as shown in the figure, it is provided with three outwardly directed fins or wings 19. The three fins 19 lie in the same plane and are located in a plane perpendicular to the center line 22 of the clip 14. According to that in Figure 5 In the embodiment shown, two of the fins 19 are arranged on each side of the gap 18. The fins 19 are configured with respect to the axis of symmetry 20 of the cross section perpendicular to the axis of symmetry 21 in such a way that the fins 19 are displaced in the direction 21 and a center axis 18, wherein the side edges of both fins 19 are located parallel to the center axis 20, but where the distance from said center axis 20 to the rear edge of a fin 19, i.e. from the edge of the fin furthest from the gap 18, is less than the distance between the the leading edge of the fin 19 and said center axis 20. By pulling the fins as far forward as possible, the best possible centering is achieved. In addition, for production technical reasons, it is difficult to get the two fins 19 at the opening 18 to point outside the gap opening. The edge of the 19 tips of the fins can advantageously be curved.
    Figure 6 shows a vertical view of the centering clip 14, seen from a diametrically opposite side relative to the gap or opening 18 of the centering clip 14.
    A clip 14 for a threaded 16 mm securing bolt 14 covers holes with a diameter that can vary between 22 to 28 mm, and can for example have the following dimensions: - Height = 25 or more - Internal radius = 7 or more - External radius = 9 mm - Width of fin = 5 mm - Outer thickness of fin = 0.7 mm - Inner thickness of fin = 0.9 mm - Radius of outer edge of the tip of the two fins 19 located on each side of the opening 18 = 14.5 mm - Distance from the side of the two fins 19 facing the opening to the center axis 20 is 3.6 mm, while the distance from the rear side edge to said center axis 20 is 1.4 mm.
    According to the invention, the hole is drilled and, for example, creamy mortar or the like is pumped into the hole. Then thread the bolt with attached clips into the hole.
    The bolt is held in place by means of the fins 19 on the clip 14 until the clip is fixed. During this operation, the fins 19 will be able to bend slightly to ensure holding without the aid of an external holding force. Alternatively, the bolt with clips can be put in place first and the mass injected into the hole afterwards. 534 165 Although the clip 14 shown is equipped with fins 19 which are perpendicular to the longitudinal axis of the clip, it should be noted that the fins 19 may be inclined in relation to the longitudinal direction of the main body of the clip 14.
    For example, a fin can be used which winds along the main body 17 of the clip at least along parts of the main body 17.
    权利要求:
    Claims (12)
    [1]
    Device for centering bolts (12) intended to be inserted into holes (13) drilled in rock (10) or the like, which device comprises an elongate, axially hollow clip (14) with an axial gap (18 ) extending along the longitudinal direction of the entire clip (14), and where the clip (14) is made of a material with built-in elasticity, so that the clip (14) can be snapped onto the bolt (12), and that the clip (14) on its outer side is provided with one or more outwardly directed fin-like devices (19), characterized in that said at least one outwardly directed fin-like device (19) is configured so that said outwardly directed fin can be bent upon insertion into the hole (13), so that said at least one outwardly directed fin-like device (19) exerts an outwardly holding holding force on the surrounding rock.
    [2]
    Device according to claim 1, characterized in that said at least one outwardly directed fin-like device (19) is located in a plane which is oriented obliquely and / or perpendicular to the longitudinal axis (22) of the clips (14).
    [3]
    Device according to claim 1 or 2, characterized in that the clip (14) has at least two of said at least one fin (19), which are arranged at each of the clips (14) and two ends, respectively.
    [4]
    Device according to claim 3, characterized in that fins (19) which are arranged at the same end lie in the same transverse plane.
    [5]
    Device according to claims 1-4, characterized in that three fins (19) are used at each end.
    [6]
    Device according to claim 5, characterized in that a fin (19) is arranged at the axis of symmetry of the clip (14).
    [7]
    Device according to claim 5 or 6, characterized in that a fin (19) is arranged on each side of the opening slot (18). 10 15 534 155 ll
    [8]
    Device according to claim 7, characterized in that the fins (19) on each side of the opening gap (18) are displaced laterally relative to a center axis (20) through the center of the clip (14), standing perpendicular to the plane of symmetry of the clip (14). (21), in the direction of the gap opening (18).
    [9]
    Device according to claim 8, characterized in that the side edges of the fins (19) are located parallel to said center axis (20).
    [10]
    Device according to claim 1, characterized in that said at least one fin (19) is helically shaped in the longitudinal direction of the clip (14).
    [11]
    Device according to one of Claims 1 to 10, characterized in that the thickness of the fins (19) decreases towards the tip of the phenomena (19), and that the fins have such a thickness that they can be bent.
    [12]
    Device according to one of Claims 1 to 11, characterized in that the inner surface of the clip (14) is provided with threads which are intended to co-operate with threads on the bolt (12) in order to be able to lock the clip (14) against displacement in axial joint, other than by means of screwing.
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    同族专利:
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    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NO20081954A|NO333879B1|2008-04-23|2008-04-23|Centering means and method for centering bolts to be inserted into holes drilled into the rock.|
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