A tunnel optical monitoring measurement point protection device

Abstract

This utility model belongs to the field of tunnel monitoring and measurement technology, specifically relating to a protective device for tunnel optical monitoring and measurement points. It includes anchor bars, a panel, a protective cover, and fixing components. The anchor bars include a pre-embedded section and an extension section. The pre-embedded section is fixed within the tunnel surrounding rock, and the extension section is located on the surface of the tunnel sidewall. The panel is located on the surface of the tunnel surrounding rock and connected to the extension section. Reflective stickers are provided on the surface of the panel facing inwards from the tunnel. The protective cover includes a cover body and ear plates. The cover body can fit around the monitoring and measurement point, and the ear plates are symmetrically arranged on opposite sides of the cover body. This utility model features a protective cover that is easy to install and disassemble, preventing damage to or contamination of the reflective stickers on the monitoring and measurement point during construction or blasting.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel monitoring and measurement technology, specifically relating to a tunnel optical monitoring and measurement point protection device. Background Technology

[0002] During the construction of underground projects such as tunnels, the settlement of the arch and the convergence of the clearance are the most intuitive manifestations of the dynamic changes of the surrounding rock. They can reflect the stability of the surrounding rock, the rationality of the construction methods and support parameters. Especially in soft strata, large deformations are likely to occur after tunnel excavation. On-site monitoring and measurement are the basic guarantees for tunnel construction and safety.

[0003] Existing technology typically involves drilling holes in the surrounding rock or shotcrete surface to install expansion bolts, reserving holes to install measuring points, and setting reflective stickers at the measuring points to facilitate periodic monitoring of the coordinate changes of the measuring points using a total station, thereby understanding the tunnel deformation.

[0004] However, since the measurement points are exposed, they are easily displaced by mechanical collisions, damaged by blasting at the working face, and contaminated by the reflective stickers on the surface during construction. Therefore, it is necessary to add protective measures that are easy to install and disassemble to avoid affecting the subsequent monitoring and measurement work. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model proposes a protective device for tunnel optical monitoring and measurement points. By setting up a protective cover that is easy to install and disassemble, it can prevent the monitoring and measurement points from being damaged or having their reflective surfaces contaminated during construction or blasting.

[0006] To solve the above-mentioned technical problems, this utility model provides a tunnel optical monitoring and measurement point protection device, comprising:

[0007] A protective cover includes a cover body and ear plates. The cover body has at least a lower opening so that the cover body can fit around the monitoring measurement point through the lower opening. The ear plates are symmetrically arranged on opposite sides of the cover body.

[0008] A fixing component that can be fitted to detachably connect the ear plate to the surrounding rock of the tunnel.

[0009] Preferably, the cover is cubic in shape, and one side of the side without the ear plate has a side opening; the ear plate is provided with a second through hole, which is a round hole, an oblong hole or an elongated hole; the fixing component is an expansion bolt.

[0010] Preferably, the monitoring and measurement point includes an anchor bar and a panel, wherein: the anchor bar includes a pre-embedded section and an extension section, the pre-embedded section is used to fix it in the surrounding rock of the tunnel, one end of the extension section is connected to the outer end of the pre-embedded section; the panel is connected to the other end of the extension section, and a reflective sticker is provided on its outer surface.

[0011] Preferably, the fixing component includes a clamp plate with a groove in the middle, an expansion bolt, and a connector. The expansion bolt can match and fix the clamp plate to the surface of the tunnel surrounding rock, and the groove of the clamp plate can match and fasten the extension section of the anchor bar. The connector can match and fix the ear plate and the two ends of the clamp plate together.

[0012] Preferably, the clamp plate has a first through hole and a threaded hole at both ends, the first through hole is located inside the lower opening and can be matched to the expansion bolt, the connector includes a fastening bolt, the ear plate has a second through hole, the fastening bolt passes through the second through hole and is threadedly connected to the threaded hole.

[0013] Preferably, the cover is cubic in shape, and one side of the side without ear plates has a side opening, and the second through hole is an elongated hole or a stepped elongated hole;

[0014] Alternatively, the protective cover may be configured as a closed structure on all four sides, and the second through hole may be a round hole or a stepped round hole.

[0015] Preferably, the connector further includes a limiting ring, which is located in the lower middle part of the fastening bolt to prevent the fastening bolt from falling out of the second through hole.

[0016] Preferably, the second through hole includes an upper section and a lower section of the second through hole that are connected to each other, and the size of the limiting ring is larger than the size of the upper section of the second through hole and smaller than the size of the lower section of the second through hole.

[0017] Preferably, the depth of the lower section of the second through hole is greater than the distance from the top surface of the limiting ring to the tail end of the fastening bolt.

[0018] Preferably, the protective cover further includes a slot, which is located at the lower opening edge below the ear plate and matches both ends of the clamp plate.

[0019] Compared with existing technologies, this utility model has the following beneficial effects:

[0020] 1. A tunnel optical monitoring and measurement point protection device according to the present invention includes a protective cover and a fixing component. The protective cover includes a cover body and ear plates. The cover body covers the periphery of the monitoring and measurement point to form protection for the monitoring and measurement point. The fixing component allows the ear plates to be detachably connected to the surrounding rock of the tunnel to stably fix the protective cover around the monitoring and measurement point, thereby effectively preventing the monitoring and measurement point from being damaged or contaminated with the surface reflective tape during construction or blasting.

[0021] 2. This utility model has specially designed a fixing component, including a clamp plate with a groove in the middle, expansion bolts and connectors. The expansion bolts in the fixing component make it stably fixed to the surface of the tunnel surrounding rock. At the same time, the connectors allow the fixing component and the protective cover to be quickly installed and fixed together. After construction or blasting is completed, only the protective cover needs to be removed to resume normal monitoring and measurement work.

[0022] 3. In this utility model, the second through hole of the ear plate is further configured to include an upper section and a lower section of the second through hole. The limiting ring of the connector is located in the lower middle part of the fastening bolt, which can prevent the fastening bolt from falling out of the upper section of the second through hole and avoid the loss of the fastening bolt. Furthermore, the depth of the lower section of the second through hole is greater than the distance from the top surface of the limiting ring to the tail end of the fastening bolt, so that the lower middle part of the fastening bolt can be completely moved into the lower section of the second through hole, which is convenient for aligning the ear plate with the clamp plate when installing the protective cover.

[0023] 4. Furthermore, the protective cover of this utility model has a side opening on one side, which allows for timely observation of the monitoring and measurement points during the blasting interval, and replacement of the protective cover when necessary. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0025] Figure 2 This is a first-view structural schematic diagram of another embodiment of the present invention.

[0026] Figure 3 This is a structural schematic diagram from a second perspective of another embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the installation state of the clamp plate according to another embodiment of the present utility model.

[0028] Figure 5 This is a schematic diagram of another embodiment of the present invention using a different protective cover.

[0029] Figure 6 This is a schematic diagram showing the installation state of another protective cover used in another embodiment of the present invention.

[0030] Figure 7 This is a schematic diagram of the structure of the connector of this utility model.

[0031] Among them, 1-anchor bar, 11-embedded section, 12-extension section, 2-panel, 3-reflective sticker, 4-protective cover, 41-cover body, 411-lower opening, 412-side opening, 42-ear plate, 421-upper section of the second through hole, 422-lower section of the second through hole, 43-slot, 5-clamp plate, 51-groove, 52-first through hole, 53-threaded hole, 6-expansion bolt, 7-connector, 71-fastening bolt, 72-limiting ring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure. Example

[0036] A tunnel optical monitoring and measurement point protection device, such as Figure 1 As shown, the protective cover 4 and fixing components are included. The protective cover 4 includes a cover body 41 and ear plates 42. The cover body 41 has at least a lower opening 411 so that the cover body 41 can be fitted around the monitoring and measurement point through the lower opening 411. The ear plates 42 are symmetrically arranged on opposite sides of the cover body 41. The lower opening 41 is fastened to the tunnel sidewall on the outer periphery of the panel 2. The ear plates 42 are located on both sides of the lower opening 41. The fixing components can detachably connect the ear plates 42 to the surrounding rock of the tunnel so as to facilitate the quick installation or removal of the protective cover 4 and prevent the monitoring and measurement point from being damaged or contaminated with its reflective surface during construction or blasting.

[0037] Combination Figure 1 As shown, this embodiment provides a more specific structure of the protective cover 4 and the fixing component. The cover 41 is cubic in shape, and one side without the ear plate has a side opening 412. The ear plate has a second through hole, which can be a round hole, an oblong hole, or a long strip hole. The fixing component is an expansion bolt. The round hole can meet the requirements for the expansion bolt to pass through. The expansion bolt passes through the round hole and is driven into the surrounding rock of the tunnel, thereby fixing the protective cover 4 to the surface of the surrounding rock of the tunnel. Figure 1 The diagram shows an oblong hole, or a long strip hole, which allows for appropriate adjustment of the position where the expansion bolts can be driven in, avoiding unsuitable rock locations and better covering the monitoring and measurement points.

[0038] In this embodiment, the cover 41 is provided with a side opening 412 for ease of manufacturing. This means that a corresponding panel may not be required on this side. It also allows for timely observation of the monitoring and measurement points during the blasting intervals, facilitating replacement of the protective cover 4 when necessary. Since the blasting direction is at the front end of the tunnel (only one direction), the side opening 412 faces the rear end of the tunnel, thus not affecting the protection of the monitoring and measurement points. The protective cover 4 structure is easy to manufacture. One side of the angle steel can be cut off, leaving one side intact. Both sides are bent downwards to form a top panel and two side panels. The two ends are then bent horizontally to form ear plates 42. A steel plate is then welded to the top panel and side panels to seal one side, leaving one side panel unused, which serves as the side opening 412. Example

[0039] This embodiment provides a tunnel optical monitoring and measurement point protection device that integrates monitoring and measurement points for overall improvement, such as... Figures 2 to 7 As shown, the monitoring and measurement point includes anchor bars 1 and a panel 2. A protective cover 4 and fixing components are also provided to protect the monitoring and measurement point. The anchor bar 1 includes a pre-embedded section 11 and an extension section 12. The pre-embedded section 11 is pre-embedded and fixed within the tunnel surrounding rock. One end of the extension section 12 is connected to the outer end of the pre-embedded section 11 and is located on the surface of the tunnel surrounding rock. The panel 2 is connected to the other end of the extension section 12 and is also located on the surface of the tunnel surrounding rock. Reflective stickers 3 are provided on the outer surface facing the tunnel interior. The protective cover 4 includes a cover body 41 and ear plates 42. The cover body 41 to... The lower part has a lower opening 411, which allows the cover 41 to fit around the monitoring and measurement point through the lower opening 411. The ear plates 42 are symmetrically arranged on opposite sides of the cover 41. The lower opening 41 is fastened to the tunnel sidewall on the outer periphery of the panel 2. The ear plates 42 are located on both sides of the lower opening 41. The fixing components can match and detachably connect the ear plates 42 to the surrounding rock of the tunnel, so as to facilitate the quick installation or removal of the protective cover 4. This can prevent the monitoring and measurement point from being damaged or contaminated with its reflective surface during construction or blasting.

[0040] Specifically, the fixing components include a clamp plate 5 with a groove 51 in the middle, expansion bolts 6, and connectors 7. The groove 51 is fastened onto the extension section 12, the expansion bolts 6 can match and fix the clamp plate 5 to the surface of the tunnel surrounding rock, and the groove of the clamp plate 5 can match and fasten the extension section of the anchor bar 1. The connectors 7 can match and fix the ear plate 42 to both ends of the clamp plate 5. It should be understood that the prior art usually involves drilling holes in the surrounding rock or shotcrete surface, using quick-setting cement or anchoring agent to fix the pre-embedded section 11 in the hole, and then bending the extension section 12 close to the surface of the tunnel sidewall and fixing it to the panel 2. In this embodiment, the clamp plate 5 is provided, which not only improves the installation stability of the anchor bar 1, but also provides a fixed foundation for the subsequent installation of the protective cover 4. After construction or blasting is completed, only the protective cover 4 needs to be removed to resume normal monitoring and measurement work.

[0041] Continue to refer to Figure 3 In this embodiment, the clamp plate 5 has a first through hole 52 and a threaded hole 53 at both ends. The first through hole 52 is located inside the lower opening 41 and matches the expansion bolt 6. The ear plate 42 is provided with a second through hole. The connector 7 includes a fastening bolt 71, which passes through the second through hole and is threadedly connected to the threaded hole 53. The depth of the threaded hole 53 is sufficient to support the fastening bolt 71 to fix the ear plate 42 on the clamp plate 5.

[0042] In some embodiments, the protective cover 4 has a side opening 412 on one side of the cover 41 without the ear plate 42. The size of the side opening 412 is larger than the size of the panel 2. The second through hole is an elongated hole or a stepped elongated hole. The elongated hole or stepped elongated hole extends towards the front and rear ends of the protective cover 4. Before the tunnel face blasting, the front end of the protective cover 4 is positioned close to the blasting point. Then, the protective cover 4 is moved back and forth to ensure that the surface of the panel 2 can be covered by the protective cover 4, preventing damage to the reflective sticker 3 from the tunnel face blasting. It is worth noting that, referring to the description of Embodiment 1, the protective cover 4 with the side opening 412 has the advantages of simple structure, easy processing, adjustable position, and small installation space occupation. Alternatively, another structure can be adopted for the protective cover 4. The protective cover 4 is set as a closed structure on all four sides, with the lower opening 411 fastened to the tunnel surrounding rock surface outside the anchor bar 1 and the panel 2, which can provide all-round protection. The second through hole is a round hole or a stepped round hole, which facilitates the passage of the fastening bolt 71.

[0043] Continue to refer to Figure 5 and Figure 6 The connector 7 also includes a limiting ring 72, which is located in the lower middle part of the fastening bolt 71 to prevent the fastening bolt 71 from falling out of the second through hole, thus avoiding loss of the fastening bolt 71. Preferably, the second through hole is a stepped elongated hole or a stepped circular hole, which is provided to better accommodate the limiting ring 72. The second through hole includes an upper section 421 and a lower section 422 that are connected to each other. The upper section 421 and the lower section 422 are coaxially arranged. The size of the limiting ring is larger than the size of the upper section 421 and smaller than the size of the lower section 422. More preferably, the depth of the lower section 422 is greater than the distance from the top surface of the limiting ring 72 to the tail end of the fastening bolt 71, so that the lower middle part of the fastening bolt 71 can be completely moved into the lower section 422, which facilitates the surface alignment of the ear plate 42 and the clamp plate 5 when installing the protective cover 4.

[0044] Continue to refer to Figure 4 and Figure 5Specifically, the protective cover 4 also includes a slot 43, which is located at the edge of the lower opening 41 below the ear plate 42 and matches both ends of the clamp plate 5. When installing the protective cover 4, the slot 43 is aligned with both ends of the clamp plate 4 and snapped down, which can quickly determine the installation direction and position of the protective cover 4.

[0045] In addition, in this embodiment, the reflective sticker 3 is embedded in the middle of the panel 2. The panel 2 includes a transparent waterproof board, which can be made of acrylic material. The transparent waterproof board covers the reflective sticker 3 and can play a role in dust and moisture prevention, preventing the reflective sticker 3 from getting damp and falling off.

[0046] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A protection device for tunnel optical monitoring and measurement points, characterized in that, include: A protective cover includes a cover body and ear plates. The cover body has at least a lower opening so that the cover body can fit around the monitoring measurement point through the lower opening. The ear plates are symmetrically arranged on opposite sides of the cover body. A fixing component that can be matched to detachably connect the ear plate to the surrounding rock of the tunnel; The monitoring and measurement points include anchor bars and panels, wherein: the anchor bars include embedded sections and extension sections, the embedded sections are used to fix the anchor bars in the surrounding rock of the tunnel, one end of the extension section is connected to the outer end of the embedded section; the panel is connected to the other end of the extension section, and a reflective sticker is provided on the outer surface. The fixing assembly includes a clamp plate with a groove in the middle, expansion bolts, and connectors. The expansion bolts can match and fix the clamp plate to the surface of the tunnel surrounding rock, and the groove of the clamp plate can match and fasten the extension section of the anchor bar. The connectors can match and fix the ear plate and the two ends of the clamp plate together.

2. The tunnel optical monitoring and measurement point protection device according to claim 1, characterized in that, The cover is cubic in shape, with a side opening on one side of the cover without ear plates; the ear plates are provided with a second through hole, which can be a round hole, an oblong hole, or an elongated hole; the fixing component is an expansion bolt.

3. The tunnel optical monitoring and measurement point protection device according to claim 1, characterized in that, The clamp plate has a first through hole and a threaded hole at both ends. The first through hole is located inside the lower opening and can be matched to the expansion bolt. The connector includes a fastening bolt. The ear plate has a second through hole. The fastening bolt passes through the second through hole and is threadedly connected to the threaded hole.

4. The tunnel optical monitoring and measurement point protection device according to claim 3, characterized in that, The cover is cubic in shape, and one side without ear plates has a side opening. The second through hole is an elongated hole or a stepped elongated hole. Alternatively, the cover may be configured as a closed structure on all four sides, and the second through hole may be a round hole or a stepped round hole.

5. The tunnel optical monitoring and measurement point protection device according to claim 4, characterized in that, The connector also includes a limiting ring, which is located in the lower middle part of the fastening bolt to prevent the fastening bolt from falling out of the second through hole.

6. The tunnel optical monitoring and measurement point protection device according to claim 5, characterized in that, The second through hole includes an upper section and a lower section of the second through hole that are connected to each other. The size of the limiting ring is larger than the size of the upper section of the second through hole and smaller than the size of the lower section of the second through hole.

7. A tunnel optical monitoring and measurement point protection device according to claim 6, characterized in that, The depth of the lower section of the second through hole is greater than the distance from the top surface of the limiting ring to the tail end of the fastening bolt.

8. A tunnel optical monitoring and measurement point protection device according to claim 7, characterized in that, The protective cover also includes a slot, which is located at the lower opening edge below the ear plate and matches both ends of the clamp plate.

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