Tunnel cement-based flexible cable trench cover plate

Abstract

The utility model discloses a tunnel cement base flexible cable trench cover plate, including the cover plate body for covering tunnel drainage outlet and adopting cement base flexible composite material to make, and with the cover plate body adaptation, preset in the drainage channel of tunnel lateral wall bottom, the butt joint end surface between adjacent cover plate body is equipped with the carding structure of mutual adaptation, the cover plate body is by three layer structure composite, specifically including sealed frame body, outer surface layer and keel buffer layer, the sealed frame body presents the frame of rectangular ring arrangement, the outer surface layer adopts cement base flexible mortar to make, and the surface layer of inside and outside of sealed frame body is covered symmetrically up and down, the keel buffer layer fixedly connected between upper and lower outer surface layer, and the buffer structure of filling in the sealed frame body inside. The utility model has solved the problem of the easy damage of existing cover plate, poor sealing, waterlogging erosion, high maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel engineering technology, and in particular relates to a flexible cable trench cover based on cement in tunnels. Background Technology

[0002] During tunnel operation, water leakage is likely to occur in the side walls and bottom. It is necessary to drain the water in a timely manner through the pre-set drainage channels to prevent water accumulation from eroding the tunnel structure and affecting traffic safety. The drainage channels need to be covered to prevent debris from blocking them and to ensure the passage of personnel and equipment.

[0003] However, existing technologies have obvious drawbacks: traditional cover plates are mostly made of rigid materials such as ordinary concrete or cast iron, which have high strength but poor flexibility. Tunnel settlement or vehicle vibration can easily cause the cover plates to crack; the joints between cover plates are mostly simple overlaps, resulting in poor sealing performance, and water can easily seep into the tunnel from the gaps; the cover plate surface does not have a dedicated water-guiding structure, and water can easily remain and corrode the cover plate for a long time, shortening its service life; in addition, it lacks a buffer structure, has weak impact resistance, and is easily damaged by vehicles running over it or falling objects. It requires frequent maintenance and is costly, making it difficult to adapt to the complex operating environment of tunnels. Therefore, targeted improvements are needed. Utility Model Content

[0004] To address the problems of existing tunnel cover plates, such as easy cracking due to rigid materials, poor sealing leading to leakage, lack of water-conducting structures causing water accumulation and erosion, weak impact resistance, and short lifespan, this utility model provides a flexible cement-based cable trench cover for tunnels. This cover offers advantages such as flexibility and crack resistance, leak-proof sealing at joints, efficient water conduction, and long lifespan due to impact resistance, solving the problems of easy damage, poor sealing, water accumulation and erosion, and high maintenance costs associated with existing covers. The device enhances crack and impact resistance through a cement-based flexible composite material and a keel buffer layer, strengthens the joint sealing through a snap-fit ​​structure, and accelerates drainage through surface water-conducting channels. This three-layer composite structure balances strength and flexibility, adapting to the humid and vibration-prone operational requirements of tunnels.

[0005] This utility model is implemented as follows: a tunnel cement-based flexible cable trench cover includes a cover body made of cement-based flexible composite material for covering the tunnel drainage outlet, and a drainage channel adapted to the cover body and pre-installed at the bottom of the tunnel sidewall. The mating end faces of adjacent cover bodies are provided with mutually adapted snap-fit ​​structures. The cover body is composed of a three-layer composite structure, specifically including a sealing frame, an outer layer, and a keel buffer layer: the sealing frame is a rectangular ring-shaped frame; the outer layer is made of cement-based flexible mortar and is symmetrically covered on the inner and outer surfaces of the sealing frame; the keel buffer layer is fixedly connected between the upper and lower outer layers and is a buffer structure filled inside the sealing frame.

[0006] As a preferred embodiment of this invention, the keel buffer layer is made of EPDM elastic rubber material, and its cross-section is arranged in a multi-fold trapezoidal shape.

[0007] As a preferred embodiment of this invention, each bend in the keel buffer layer is provided with a gap between it and the upper and lower outer surfaces; the gap is filled with polyurethane foam buffer material.

[0008] As a preferred embodiment of this invention, both the water-facing and water-repellent surfaces of the outer layer are uniformly coated with a layer of polyurea waterproof coating.

[0009] As a preferred embodiment of this utility model, two rectangular grooves are symmetrically formed along the inner edge of the upper end of the drainage channel, and a trapezoidal block is integrally formed on the inner wall of the lower end of the groove. The back surface of the cover plate body is provided with a trapezoidal groove that cooperates with and connects to the trapezoidal block.

[0010] As a preferred embodiment of this invention, the inner wall of the trapezoidal groove is fixedly connected with an anti-collision rubber pad.

[0011] As a preferred embodiment of this invention, the water-facing surface of the cover plate body is uniformly provided with multiple anti-slip stripes.

[0012] As a preferred embodiment of this utility model, the outer walls on both sides of the cover plate body have rectangular openings at the center position along the height direction.

[0013] As a preferred embodiment of this utility model, two trapezoidal slots are symmetrically arranged on the front and rear sides of the opening on the left outer wall of the cover plate body.

[0014] As a preferred embodiment of this utility model, the outer wall of the right side of the cover plate body is integrally formed with a trapezoidal locking block that perfectly matches the shape and size of the trapezoidal slot; the adjacent cover plate bodies are rigidly connected by the interference fit between the locking block and the slot.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The cover plate body of this utility model is made of cement-based flexible composite material, which combines structural strength and flexibility. It can adapt to slight deformation of the tunnel and has excellent crack resistance, avoiding cracking of the cover plate due to tunnel settlement or vibration. Furthermore, the adjacent cover plates are connected by an adaptive snap-fit ​​structure, which can effectively limit the displacement of the cover plates and improve the sealing of the connection, preventing water leakage from the gaps between the cover plates. Through the three-layer composite structure design, the sealing frame ensures the support and sealing effect, while the outer surface layer enhances the surface performance. Combined with the keel buffer layer to absorb vibration impact, the overall impact resistance and service life of the cover plate are improved, making it suitable for the complex operating environment of tunnels that are humid and vibrating. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cover plate body connection structure provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the cover plate body provided in an embodiment of the present utility model; Figure 3This is a cross-sectional schematic diagram of the cover plate body provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the cover plate body installation provided in an embodiment of this utility model.

[0017] In the diagram: 1. Cover plate body; 2. Outer surface layer; 3. Sealing frame; 4. Keel buffer layer; 5. Drainage channel; 11. Anti-slip stripes; 12. Trapezoidal groove; 13. Slot; 16. Block; 17. Opening; 21. Coating; 41. Buffer material; 51. Trapezoidal block; 52. Groove. Detailed Implementation

[0018] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0019] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] Example 1: like Figures 1 to 4 As shown in the figure, this utility model provides a tunnel cement-based flexible cable trench cover, including a cover body 1 made of cement-based flexible composite material for covering tunnel drainage outlets, and a drainage channel 5 adapted to the cover body 1 and pre-installed at the bottom of the tunnel sidewall. Adaptive snap-fit ​​structures are provided between the mating end faces of adjacent cover bodies 1. The cover body 1 is composed of a three-layer composite structure, specifically including a sealing frame 3, an outer layer 2, and a keel buffer layer 4. The sealing frame 3 is a rectangular ring-shaped frame. The outer layer 2 is made of cement-based flexible mortar and symmetrically covers the inner and outer surfaces of the sealing frame 3. The keel buffer layer 4 is fixedly connected to the upper and lower layers. The outer layer 2 is filled with a buffer structure inside the sealing frame 3; the cover plate body 1 is made of cement-based flexible composite material, which has both structural strength and flexibility, can adapt to slight deformation of the tunnel, has excellent crack resistance, and avoids cracking of the cover plate due to tunnel settlement or vibration; and the adjacent cover plates are connected by an adaptive snap-fit ​​structure, which can effectively limit the displacement of the cover plate, while improving the sealing performance of the connection and preventing water from seeping from the gap between the cover plates; through the three-layer composite structure design, the sealing frame 3 ensures the support and sealing effect, while the outer layer 2 enhances the surface performance, and the keel buffer layer 4 absorbs vibration impact, thus improving the overall impact resistance and service life of the cover plate, and adapting to the complex use environment of tunnels that are humid and vibrating.

[0021] like Figure 3 As shown, the keel buffer layer 4 is made of EPDM elastic rubber material, and its cross-section is arranged in a multi-fold trapezoidal shape; this structure can increase the deformation space of the keel buffer layer 4, enhance the absorption capacity of tunnel vibration and impact, and at the same time improve the bending resistance of the cover plate body 1.

[0022] Each bend in the keel buffer layer 4 has a pre-reserved gap between it and the upper and lower outer layers 2; the gap is filled with polyurethane foam buffer material 41; the buffer material 41 can further absorb high-frequency micro-vibrations and prevent the outer layer 2 from cracking due to long-term vibration and friction with the keel buffer layer 4.

[0023] The outer surface 2 is uniformly coated with a layer of polyurea waterproof coating 21 on both the water-facing and back surfaces. This coating 21 can block water penetration and resist the corrosion of cement-based materials caused by the humid environment inside the tunnel, thus extending the service life of the cover plate body 1.

[0024] like Figure 4 As shown, two rectangular grooves 52 are symmetrically formed along the inner edge of the upper end of the drainage channel 5. A trapezoidal block 51 is integrally formed on the inner wall of the lower end of the groove 52. A trapezoidal groove 12 that cooperates with the trapezoidal block 51 is provided on the back side of the cover plate body 1. An anti-collision rubber pad is fixedly connected to the inner wall of the trapezoidal groove 12. The groove 52 and the trapezoidal block 51 cooperate to limit the installation position of the cover plate body 1 laterally, preventing the cover plate body 1 from being displaced laterally due to water flow impact or people stepping on it.

[0025] The water-facing surface of the cover plate body 1 is uniformly provided with multiple anti-slip stripes 11; the anti-slip stripes 11 are integrally formed with the outer surface layer 2, which can improve the friction coefficient of the cover plate surface and prevent personnel and equipment from slipping when walking on the wet cover plate.

[0026] The cover plate body 1 has rectangular openings 17 at the center of the left and right outer walls along the height direction; the openings 17 are used to insert handling tools (such as pry bars or grippers) to prevent the cover plate from slipping out of the hand during handling due to its smooth surface, thereby shortening the handling time of a single cover plate and improving installation efficiency.

[0027] Two trapezoidal slots 13 are symmetrically arranged on the front and rear sides of the opening 17 on the left outer wall of the cover plate body 1. The slots 13 are staggered from the opening 17 to avoid weakening the structural strength at the opening 17, while providing a precise fitting space for the right side locking block 16 of the adjacent cover plate.

[0028] The outer right side wall of the cover plate body 1 is integrally formed with a trapezoidal locking block 16 that perfectly matches the shape and size of the trapezoidal slot 13; the adjacent cover plate bodies 1 are rigidly connected by the interference fit between the locking block 16 and the slot 13; this can prevent gaps from forming between the cover plates due to vibration, improve the overall sealing performance, and prevent water from leaking from the joint of the cover plates.

[0029] Working principle of Example 1: When in use, first align the cover plate body 1 with the pre-set drainage channel 5 in the tunnel, use the groove 52 of the drainage channel 5 and the trapezoidal block 51 to position the cover plate laterally, and then use the trapezoidal locking block 16 on the right side of the adjacent cover plate body 1 and the trapezoidal locking groove 13 on the left side to achieve tight splicing of multiple cover plates and limit the displacement of the cover plates; when transporting, tools can be inserted through the openings 17 on both sides of the cover plate for convenient loading and unloading.

[0030] When the tunnel undergoes slight deformation due to settlement or is impacted by vehicle vibration, the cement-based flexible composite material of the cover plate body 1 and the keel buffer layer 4 with a multi-fold trapezoidal cross section can deform synchronously to absorb the impact energy. The buffer material 41 in the reserved space further attenuates high-frequency micro-vibrations. The polyurea waterproof coating 21 of the outer layer 2 blocks water penetration and environmental corrosion, ensuring the long-term stable use of the cover plate and realizing the integrated functions of drainage, protection and deformation resistance.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tunnel cement-based flexible cable trench cover, comprising a cover body (1) made of cement-based flexible composite material for covering tunnel drainage outlets, and a drainage channel (5) adapted to the cover body (1) and pre-installed at the bottom of the tunnel sidewall, characterized in that: The mating end faces of adjacent cover plate bodies (1) are provided with a mutually compatible snap-fit ​​structure. The cover plate body (1) is composed of a three-layer structure, specifically including a sealing frame (3), an outer surface layer (2) and a keel buffer layer (4): the sealing frame (3) is a rectangular ring-shaped frame, the outer surface layer (2) is made of cement-based flexible mortar and is symmetrically covered on the inner and outer surfaces of the sealing frame (3), and the keel buffer layer (4) is a buffer structure fixedly connected between the upper and lower outer surface layers (2) and filled inside the sealing frame (3).

2. The tunnel cement-based flexible cable trench cover as described in claim 1, characterized in that: The keel buffer layer (4) is made of EPDM elastic rubber material, and its cross-section is arranged in a multi-fold trapezoidal shape.

3. The tunnel cement-based flexible cable trench cover as described in claim 2, characterized in that: Each bend in the keel buffer layer (4) is provided with a gap space between it and the upper and lower outer surfaces (2); the gap space is filled with polyurethane foam buffer material (41).

4. The tunnel cement-based flexible cable trench cover as described in claim 1, characterized in that: The outer surface (2) is uniformly coated with a layer of polyurea waterproof coating (21) on both the water-facing and back surfaces.

5. A tunnel cement-based flexible cable trench cover as described in claim 1, characterized in that: The drainage channel (5) has two rectangular grooves (52) symmetrically opened at the upper inner edge. The lower inner wall of the groove (52) is integrally formed with a trapezoidal block (51). The back surface of the cover plate body (1) is provided with a trapezoidal groove (12) that cooperates with and connects with the trapezoidal block (51).

6. The tunnel cement-based flexible cable trench cover as described in claim 5, characterized in that: The inner wall of the trapezoidal groove (12) is fixedly connected with an anti-collision rubber pad.

7. A tunnel cement-based flexible cable trench cover as described in claim 1, characterized in that: The water-facing surface of the cover plate body (1) is uniformly provided with multiple anti-slip stripes (11).

8. A tunnel cement-based flexible cable trench cover as described in claim 1, characterized in that: The cover plate body (1) has rectangular openings (17) at the center of the left and right outer walls along the height direction.

9. A tunnel cement-based flexible cable trench cover as described in claim 8, characterized in that: The opening (17) on the left outer wall of the cover plate body (1) has two trapezoidal slots (13) symmetrically arranged on the front and rear sides.

10. A tunnel cement-based flexible cable trench cover as described in claim 9, characterized in that: The outer right side wall of the cover plate body (1) is integrally formed with a trapezoidal locking block (16) that perfectly matches the shape and size of the trapezoidal slot (13); the adjacent cover plate bodies (1) are rigidly connected by the interference fit between the locking block (16) and the slot (13).

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