Optical cable fixing equipment for tunnel reinforcing mesh

Abstract

The utility model discloses optical cable fixing equipment for a tunnel reinforcing mesh. The optical cable fixing equipment comprises a C-shaped piece, a first arc-shaped piece fixed at one end of the C-shaped piece, and a second arc-shaped piece hinged at the other end of the C-shaped piece, the inner diameter of the first arc-shaped piece and the inner diameter of the second arc-shaped piece are both larger than the inner diameter of the C-shaped piece. The end, away from the C-shaped piece, of the first arc-shaped piece is detachably connected with the end, away from the C-shaped piece, of the second arc-shaped piece. The utility model provides an optical cable fixing device for a tunnel reinforcing mesh, so as to solve the problem that the position of an optical cable wound on the tunnel reinforcing mesh is easy to deviate in the prior art, and achieve the purposes of reducing the offset of the optical cable and improving the safety of the later anchor rod fixing construction operation.

Description

Technical Field

[0001] The utility model relates to the field of tunnel construction, in particular to an optical cable fixing device used for tunnel steel mesh. Background Art

[0002] The stress changes and vibration speed of the walls of subway tunnels, high-speed tunnels, urban pipe corridors, etc. are related to the safety of subway, high-speed vehicles, urban pipe corridor equipment, etc., as well as the safety of people's lives and property. In recent years, the monitoring technology that uses strain optical cables as both sensors and transmission channels has been continuously developed in the engineering field. Its principle is to inject a fixed frequency and wavelength of detection light from one end of the optical fiber, and each position of the optical fiber will generate a back Rayleigh echo, which carries the acoustic wave field parameters of the optical fiber molecular cluster lattice; when the acoustic wave energy of the surrounding environment is transmitted to the glass lattice in the optical fiber, the Rayleigh back echo generated by the lattice will vibrate with the vibration frequency of the lattice; by demodulating the vibration energy difference, the acoustic wave field characteristics of the point can be obtained, and the environmental strain can be obtained through corresponding calculations.

[0003] In the prior art, the strain monitoring of tunnels is generally only carried out on the surface of the vault after the initial support is completed. Under the support of the large rigidity of the initial support, this monitoring method has the disadvantages of being difficult to accurately obtain the surrounding rock strain and having a large hysteresis. In order to overcome the above defects, the applicant in this case proposed the idea of ​​arranging strain optical fibers inside the initial support. Specifically, the corresponding optical cables are wound around the steel mesh of the excavation surface, and then they are sprayed and consolidated together.

[0004] The traditional technology of winding the optical cable on the steel mesh is to wrap the optical cable around the cross position on the steel mesh only in the area where the optical cable needs to turn. Although this method can ensure the bidirectional stability of the optical cable in the turning position, it is impossible to achieve a stable connection with the steel bars for the straight section of the optical cable between the two turning sections; and because a certain margin is reserved when the optical cable is arranged, the optical cable will not be in a completely straight state, and the optical cable also needs to face the working condition of re-spraying concrete. Therefore, under the influence of the above factors, under the impetus of the larger concrete spraying force, the straight section of the optical cable is easily pushed, resulting in the final consolidation position of the straight section of the optical cable being relatively random and unable to be determined from the outside; although the occurrence of this situation has little effect on the strain monitoring function of the optical cable, since the optical cable is located inside the initial support of the tunnel, anchor bolt fixing construction is required in the later stage. If the position of the optical cable deviates too much, it is possible that the anchor bolt cannot accurately avoid the optical cable, and even cause a serious engineering accident in which the anchor bolt cuts the optical cable. Utility Model Content

[0005] The utility model provides an optical cable fixing device for tunnel steel mesh, so as to solve the problem that the optical cable wound on the tunnel steel mesh in the prior art is prone to position deviation, and achieves the purpose of reducing the deviation of the optical cable and improving the safety of the later anchor fixing construction work.

[0006] The utility model is realized by the following technical solutions:

[0007] A cable fixing device for tunnel steel mesh comprises a C-shaped member, a first arc-shaped member fixed at one end of the C-shaped member, and a second arc-shaped member hinged at the other end of the C-shaped member; the inner diameters of the first arc-shaped member and the second arc-shaped member are both larger than the inner diameter of the C-shaped member; an end of the first arc-shaped member away from the C-shaped member and an end of the second arc-shaped member away from the C-shaped member are detachably connected.

[0008] In traditional processes, the connection between optical cables and steel bars is usually achieved through the use of a binding process. However, in the present application, since the spraying direction of the re-sprayed concrete process is not fixed, and in order to avoid damaging or even cutting the optical cable sheath, the binding process cannot be tied too tightly, which results in the binding points not being well fixed along the axial direction of the steel bars. Once the spraying direction of the re-sprayed concrete coincides with the axial direction of the steel bars at the binding points or has a small angle, the binding belt may be pushed as a whole, resulting in insufficient connection stability. Therefore, the traditional binding process is not suitable for the connection of optical cables and steel bars under the working conditions of the present application.

[0009] Therefore, in view of the problem that the optical cable wound on the tunnel steel mesh in the prior art is prone to position displacement, the utility model proposes an optical cable fixing device for the tunnel steel mesh, wherein the C-shaped piece is used to partially cover the optical cable, and the first arc-shaped piece and the second arc-shaped piece can be spliced ​​to form a larger arc-shaped piece for partially covering the steel bar. When in use, first open the second arc-shaped piece, pass the optical cable through the inside of the first arc-shaped piece and the second arc-shaped piece, and insert it into the C-shaped piece from the notch of the C-shaped piece, then put the first arc-shaped piece on the surface of the steel bar, buckle the second arc-shaped piece, and complete the connection between the second arc-shaped piece and the first arc-shaped piece, so as to improve the connection stability of the optical cable on the steel mesh and reduce the displacement risk caused by the later re-spraying of concrete.

[0010] Furthermore, the inner diameters of the first arc-shaped member and the second arc-shaped member are equal; when the first arc-shaped member and the second arc-shaped member are connected to each other, the first arc-shaped member and the second arc-shaped member are concentric, and the inner walls of the first arc-shaped member and the second arc-shaped member are continuous.

[0011] Furthermore, the inner diameter of the C-shaped member is smaller than the outer diameter of the fixed optical cable.

[0012] Furthermore, the inner diameters of the first arc-shaped member and the second arc-shaped member are equal to the outer diameters of the steel bars in the tunnel steel mesh.

[0013] Furthermore, a plurality of ridges are provided on the inner walls of the first arc-shaped member and the second arc-shaped member.

[0014] The inner diameter of the C-shaped part is smaller than the outer diameter of the optical cable, so the optical cable can be firmly squeezed inside the C-shaped part for fixation; at the same time, since the inner diameters of the first arc-shaped part and the second arc-shaped part are equal to the outer diameter of a single steel bar, and the inner walls of the first arc-shaped part and the second arc-shaped part have a plurality of ridges; therefore, after the second arc-shaped part is connected to the first arc-shaped part, each ridge and / or the first arc-shaped part and the second arc-shaped part are slightly deformed, and there is a large friction resistance between the single steel bar and the positioning device, which can reduce the risk of the equipment moving along the axial direction of the steel bar, and significantly reduce the risk of displacement of the connection point of the optical cable on the steel bar mesh due to excessive spraying force of the re-sprayed concrete, thereby significantly improving the connection stability of the optical cable on the steel bar mesh, avoiding serious displacement of the optical cable under the push of the concrete spraying force, resulting in position deviation, thereby reducing the risk of accidental contact with the optical cable during the later anchor fixing construction process, which may cause an engineering accident, and ensuring the safety of the later anchor fixing construction.

[0015] Preferably, the inner diameter of the C-shaped member is 1 to 3 mm smaller than the outer diameter of the optical cable to be fixed.

[0016] Preferably, the thickness of the ridge along the radial direction is 1 to 3 mm.

[0017] Furthermore, a slot is provided at one end of the first arc-shaped member away from the C-shaped member, and a block is provided at one end of the second arc-shaped member away from the C-shaped member, and the slot and the block match each other.

[0018] In this solution, the first arc-shaped member and the second arc-shaped member are detachably connected through mutually matching slots and blocks; when the first arc-shaped member and the second arc-shaped member need to be connected, the second arc-shaped member is rotated toward the first arc-shaped member, and the block is squeezed to be inserted into the corresponding slot.

[0019] Furthermore, both side walls of the clamping slot along the radial direction are provided with arc-shaped widening grooves, and both side walls of the clamping block along the radial direction are provided with elastic protrusions, and the arc-shaped widening grooves match the elastic protrusions.

[0020] When assembling the first arc-shaped member and the second arc-shaped member, it is only necessary to press the second arc-shaped member toward the first arc-shaped member so that the elastic protrusion is deformed by the force and enters the slot until the elastic protrusion reaches the position of the arc-shaped widening groove. At this time, the force on the elastic protrusion is released and it is reset in the arc-shaped widening groove, that is, the elastic protrusion is assembled in the arc-shaped widening groove, thereby realizing effective positioning and connection of the first arc-shaped member and the second arc-shaped member.

[0021] Furthermore, the elastic protrusion is a metal spring.

[0022] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0023] 1. The utility model is a cable fixing device for tunnel steel mesh, which can reduce the risk of serious displacement of the optical cable under the force of concrete spraying and avoid large deviation of the position of the optical cable.

[0024] 2. The utility model is a fiber optic cable fixing device for tunnel steel mesh, which can significantly improve the connection stability of the optical cable on the steel mesh and reduce the risk of engineering accidents caused by accidental contact with the optical cable during the later anchor fixing construction work. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0026] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0027] Figure 2 It is a cross-sectional view of a specific embodiment of the utility model when in use;

[0028] Figure 3 for Figure 1 A partial enlarged view of the middle A;

[0029] Figure 4 for Figure 1 A partial enlarged view of point B in the middle.

[0030] Marks and corresponding parts names in the attached drawings:

[0031] 1011 - steel bar, 102 - optical cable, 104 - C-shaped member, 105 - first arc-shaped member, 106 - second arc-shaped member, 107 - convex ridge, 108 - slot, 1081 - arc-shaped widening slot, 109 - block, 1091 - elastic protrusion. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model is further described in detail in combination with the embodiments and the accompanying drawings. The schematic implementation mode of the utility model and its description are only used to explain the utility model and are not used as a limitation of the utility model. In the description of the present application, it should be understood that the orientation or position relationship indicated by terms such as "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0033] Embodiment 1:

[0034] like Figure 1 and Figure 2 The optical cable fixing device shown in the figure for tunnel steel mesh includes a C-shaped member 104, a first arc-shaped member 105 fixed at one end of the C-shaped member 104, and a second arc-shaped member 106 hinged at the other end of the C-shaped member 104; the inner diameters of the first arc-shaped member 105 and the second arc-shaped member 106 are equal, and the end of the first arc-shaped member 105 away from the C-shaped member 104 and the end of the second arc-shaped member 106 away from the C-shaped member 104 are detachably connected; when the first arc-shaped member 105 and the second arc-shaped member 106 are connected to each other, the first arc-shaped member 105 and the second arc-shaped member 106 are concentric, and the inner walls of the first arc-shaped member 105 and the second arc-shaped member 106 are continuous.

[0035] Among them, the inner diameter of the C-shaped member 104 is smaller than the outer diameter of the optical cable 102, preferably 1 to 3 mm smaller; the inner diameters of the first arc-shaped member 105 and the second arc-shaped member 106 are equal to the maximum outer diameter of the steel bar 1011; and it also includes a plurality of ridges 107 arranged on the inner walls of the first arc-shaped member 105 and the second arc-shaped member 106.

[0036] In a more preferred embodiment, several ridge groups are evenly distributed along the axial direction of the first arc-shaped member 105 and the second arc-shaped member 106, and each ridge group includes 6 to 8 ridges 107 arranged in an annular manner on the inner walls of the first arc-shaped member 105 and the second arc-shaped member 106; the thickness of the ridges 107 along the radial direction is preferably 1 to 3 mm.

[0037] Embodiment 2:

[0038] A cable fixing device for tunnel steel mesh. Based on Example 1, a first arc-shaped member 105 has a slot 108 at one end away from the C-shaped member 104, and a block 109 is provided at one end of the second arc-shaped member 106 away from the C-shaped member 104, and the slot 108 and the block 109 match each other.

[0039] More preferably, Figure 3 and Figure 4 As shown, arc-shaped widening grooves 1081 are provided on both side walls of the slot 108 along the radial direction, and elastic protrusions 1091 are provided on both side walls of the block 109 along the radial direction, and the arc-shaped widening grooves 1081 match the elastic protrusions 1091 .

[0040] When assembling the first arc-shaped member 105 and the second arc-shaped member 106, it is only necessary to press the second arc-shaped member 106 toward the first arc-shaped member 105, so that the elastic protrusion 1091 is deformed by the force and enters the slot 108, until the elastic protrusion reaches the position of the arc-shaped widening groove 1081. At this time, the elastic protrusion is reset in the arc-shaped widening groove, that is, the elastic protrusion is assembled in the arc-shaped widening groove, and the effective connection between the first arc-shaped member 105 and the second arc-shaped member 106 can be achieved.

[0041] Preferably, the elastic protrusion 1091 is a metal spring; either a hollow or solid structure can be adopted, as long as it has sufficient deformation ability to be squeezed through the notch of the slot 108 and enter the arc-shaped widened groove 1081 to recover.

[0042] When this embodiment is used, first open the second arc-shaped member 106, pass the optical cable 102 horizontally through the area between the first arc-shaped member 105 and the second arc-shaped member 106, and insert it into the C-shaped member 104 from the notch of the C-shaped member 104; then put the first arc-shaped member 105 on the outside of the steel bar 1011, rotate the second arc-shaped member 106 in the direction of splicing with the first arc-shaped member 105, and press the first arc-shaped member 105 and the second arc-shaped member 106 toward each other with force, so that the clamping block 109 is squeezed into the clamping groove 108.

[0043] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, the term "connected" used in this article can be directly connected or indirectly connected via other components without special explanation.

Claims

1. An optical cable fixing device for tunnel steel mesh, characterized in that: The invention comprises a C-shaped member (104), a first arc-shaped member (105) fixed at one end of the C-shaped member (104), and a second arc-shaped member (106) hinged at the other end of the C-shaped member (104); the inner diameters of the first arc-shaped member (105) and the second arc-shaped member (106) are both larger than the inner diameter of the C-shaped member (104); and one end of the first arc-shaped member (105) away from the C-shaped member (104) and one end of the second arc-shaped member (106) away from the C-shaped member (104) are detachably connected.

2. The optical cable fixing device for tunnel steel mesh according to claim 1, characterized in that: The inner diameters of the first arc-shaped member (105) and the second arc-shaped member (106) are equal; when the first arc-shaped member (105) and the second arc-shaped member (106) are connected to each other, the first arc-shaped member (105) and the second arc-shaped member (106) are concentric, and the inner walls of the first arc-shaped member (105) and the second arc-shaped member (106) are continuous.

3. The optical cable fixing device for tunnel steel mesh according to claim 1 is characterized in that: The inner diameter of the C-shaped member (104) is smaller than the outer diameter of the fixed optical cable.

4. The optical cable fixing device for tunnel steel mesh according to claim 3 is characterized in that: The inner diameter of the C-shaped member (104) is 1 to 3 mm smaller than the outer diameter of the optical cable to be fixed.

5. The optical cable fixing device for tunnel steel mesh according to claim 1, characterized in that: The inner diameters of the first arc-shaped member (105) and the second arc-shaped member (106) are equal to the outer diameters of the steel bars in the tunnel steel mesh.

6. The optical cable fixing device for tunnel steel mesh according to claim 1, characterized in that: A plurality of ridges (107) are provided on the inner walls of the first arc-shaped member (105) and the second arc-shaped member (106).

7. The optical cable fixing device for tunnel steel mesh according to claim 6, characterized in that: The thickness of the ridge (107) along the radial direction is 1 to 3 mm.

8. The optical cable fixing device for tunnel steel mesh according to claim 1, characterized in that: A clamping groove (108) is provided at one end of the first arc-shaped member (105) away from the C-shaped member (104), and a clamping block (109) is provided at one end of the second arc-shaped member (106) away from the C-shaped member (104), and the clamping groove (108) and the clamping block (109) match each other.

9. The optical cable fixing device for tunnel steel mesh according to claim 8, characterized in that: The slot walls on both sides of the clamping slot (108) in the radial direction are both provided with arc-shaped widening slots, and the side walls on both sides of the clamping block (109) in the radial direction are both provided with elastic protrusions, and the arc-shaped widening slots match the elastic protrusions.

10. The optical cable fixing device for tunnel steel mesh according to claim 9, characterized in that: The elastic protrusion is a metal spring.

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