A tunnel cable trough reserved slot structure

Abstract

This utility model discloses a reserved groove structure for a tunnel cable trough, including: a reserved groove, a grounding component, and a communication signal groove. The reserved groove is located at the bottom of the communication signal groove near the line side. The reserved groove has a rectangular structure and a grouting cavity with an inverted trapezoidal structure is provided inside the reserved groove. A connector is also provided inside the reserved groove. The ground wire extending from the communication signal groove passes through the reserved groove and enters the connector. By reserving a reserved groove at the bottom of the communication signal groove and setting the reserved groove as a specific rectangular groove, the rectangular reserved groove forms a three-dimensional constraint structure for the filling cement mortar. At the same time, the inverted trapezoidal cross-section design of the grouting cavity, which is wider at the top and narrower at the bottom, makes the constraint force of the groove wall on the cement mortar more uniform during the solidification and shrinkage process, effectively suppressing the generation of cracks and preventing the cement mortar from falling off. In addition, the through ground wire is confined within the groove space of the reserved groove, thereby providing long-term stable physical protection for the through ground wire.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering structure technology, and in particular to a reserved groove structure for tunnel cable troughs. Background Technology

[0002] In tunnel engineering, the through ground wire is usually laid at the bottom of the communication signal trench near the corner of the line side. The current construction method is to roughen the concrete surface, apply an interface agent, and then seal the through ground wire with M20 cement mortar. However, this traditional method has many problems: First, the cement mortar is prone to cracking and falling off, resulting in poor protection of the through ground wire, increasing later maintenance costs and safety hazards; second, the appearance quality of the sealed cement mortar is poor, affecting the overall aesthetics of the tunnel; third, the sealed cement mortar will encroach on the internal clearance of the communication signal trench, adversely affecting the installation and normal operation of the communication signal equipment, and limiting the usable space of the communication signal trench.

[0003] Therefore, a tunnel cable trough pre-reserved groove structure is proposed to solve the above problems. Utility Model Content

[0004] This utility model overcomes the shortcomings of the prior art and provides a reserved slot structure for tunnel cable troughs. To achieve the above objective, the technical solution adopted by this utility model is as follows: a reserved slot structure for tunnel cable troughs, comprising: a reserved slot, a grounding component, and a communication signal slot. The reserved slot is located at the bottom of the communication signal slot near the line side. The reserved slot has a rectangular structure, and a filling cavity is provided inside the reserved slot. The filling cavity has an inverted trapezoidal structure. A connector is also provided inside the reserved slot. The ground wire extending from the communication signal slot passes through the reserved slot and enters the connector.

[0005] In a preferred embodiment of this utility model, the infusion cavity has a depth of 10cm, a bottom inner width of 5cm, and a top inner width of 7cm.

[0006] In a preferred embodiment of this utility model, the wall thickness of the reserved groove is ≥3cm.

[0007] In a preferred embodiment of this utility model, the inner side of the reserved groove wall is provided with a rough texture.

[0008] In a preferred embodiment of the present invention, a grounding component is further included, which includes a grounding device, a connecting steel bar, and a second grounding terminal.

[0009] In a preferred embodiment of the present invention, a first grounding terminal is provided at the bottom of the reserved slot, and the first grounding terminal is connected to the grounding device.

[0010] In a preferred embodiment of this utility model, one end of the connecting steel bar is connected to the grounding device, and the other end is connected to the second grounding terminal.

[0011] In a preferred embodiment of the present invention, the connecting steel bar further includes a longitudinal connecting steel bar, which is disposed near the second grounding terminal.

[0012] In a preferred embodiment of this utility model, the connector is L-shaped.

[0013] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0014] (1) This utility model, by reserving a pre-reserved groove at the bottom of the communication signal slot and setting the pre-reserved groove to a rectangular groove of a specific size, compared with the traditional method of directly filling the bottom corner of the groove, the rectangular pre-reserved groove forms a three-dimensional constraint structure for the filling cement mortar. At the same time, the inverted trapezoidal cross-section design of the grouting cavity, which is wider at the top and narrower at the bottom, makes the constraint force of the groove wall on the cement mortar more uniform during the solidification and shrinkage process, effectively suppressing the generation of cracks and preventing the cement mortar from falling off. In addition, the through ground wire is confined within the groove space, thus providing long-term and stable physical protection for the through ground wire.

[0015] (2) The rectangular groove of this utility model has a clear boundary dimension. After the cement mortar is filled, it is completely confined in the groove and will not exceed the range of the rectangular groove. This accurately ensures the net size inside the communication signal groove, provides sufficient space for the installation and operation of communication signal equipment, and improves the performance of the communication signal groove. Compared with the traditional filling method where the cement mortar has no boundary restriction and is easy to expand into the communication signal groove and occupy the effective space, this utility model ensures the net size inside the groove.

[0016] (3) This utility model connects the reserved slot to the bottom of the communication signal slot by setting the reserved slot at the bottom of the communication signal slot near the line side. During construction, it is formed by integral concrete casting, without the need for additional complex secondary construction processes. The construction process is simple and easy to implement on site. At the same time, this utility model only uses a simple slot structure and does not increase the material and construction costs too much. Under the premise of ensuring the quality of the project, it has good economic benefits and engineering practicality.

[0017] (4) The inner side of the reserved groove wall of this utility model is designed with a rough texture, which increases the contact area between the groove wall and the cement mortar, significantly improves the bonding strength between the two, further reduces the risk of cement mortar cracking and falling off, and improves the overall reliability of the structure. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of a tunnel cable trough structure according to a preferred embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the reserved slot structure of a preferred embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the infusion cavity structure of a preferred embodiment of the present invention.

[0022] In the figure: 1. Reserved groove; 10. Injection cavity; 11. Connector; 12. First grounding terminal; 2. Communication signal groove; 3. Grounding component; 30. Grounding device; 31. Connecting steel bar; 310. Longitudinal connecting steel bar; 32. Second grounding terminal. Detailed Implementation

[0023] 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.

[0024] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, a tunnel cable trough reserved groove 1 structure includes: reserved groove 1, grounding component 3 and communication signal groove 2. The reserved groove 1 is located at the bottom of the communication signal groove 2 near the line side. The reserved groove 1 has a rectangular structure and a grouting cavity 10 is provided inside the reserved groove 1. The grouting cavity 10 has an inverted trapezoidal structure. Preferably, the grouting cavity 10 has a depth of 10cm, a bottom inner width of 5cm, and a top inner width of 7cm. The groove wall thickness of the reserved groove 1 is ≥3cm. By reserving the reserved groove 1 at the bottom of the communication signal groove 2 and setting the reserved groove 1 as a rectangular groove of a specific size, compared with the traditional method of directly grouting the bottom corners of the groove, the rectangular reserved groove 1 forms a three-dimensional constraint structure for the filled cement mortar. At the same time, the inverted trapezoidal cross-section design of the grouting cavity, which is wider at the top and narrower at the bottom, makes the constraint force of the groove wall on the cement mortar more uniform during the solidification and shrinkage process, effectively suppressing the generation of cracks and preventing the cement mortar from falling off.

[0027] The reserved slot 1 is also provided with a connector 11. Preferably, the connector 11 is L-shaped. The ground wire extending from the communication signal slot 2 passes through the reserved slot 1 and enters the connector 11. Specifically, the reserved slot 1 structure also includes a grounding component 3. The grounding component 3 includes a grounding device 30, a connecting steel bar 31, and a second grounding terminal 32. A first grounding terminal 12 is provided at the bottom of the reserved slot 1. The first grounding terminal 12 is connected to the grounding device 30. One end of the connecting steel bar 31 is connected to the grounding device 30, and the other end is connected to the second grounding terminal 32. The connecting steel bar 31 also includes a longitudinal connecting steel bar 31. 0. The longitudinal connecting steel bar 310 is set near the second grounding terminal 32, thereby extending the ground wire from the bottom of the communication signal slot 2 to complete the grounding work. By confining the ground wire within the space of the reserved slot 1, long-term and stable physical protection is provided for the through ground wire. In addition, the grounding work of the ground wire is completed through the above structure, providing sufficient space for the installation and operation of communication signal equipment, improving the performance of the communication signal slot 2. Compared with the traditional potting method where cement mortar has no boundary restriction and is easy to expand into the communication signal slot 2 and encroach on the effective space, this method ensures the clearance inside the slot.

[0028] In a preferred embodiment of this utility model, the inner side of the wall of the reserved groove 1 is provided with a rough texture. The rough texture design of the inner side of the wall of the reserved groove 1 increases the contact area between the groove wall and the cement mortar, significantly improves the bonding strength between the two, further reduces the risk of cement mortar cracking and falling off, and improves the overall reliability of the structure.

[0029] When this utility model is used, during the construction of the tunnel communication signal trough 2, the template is erected according to the design requirements. A customized rectangular reserved trough 1 template is installed at the bottom of the communication signal trough 2 near the line side. Preferably, the reserved trough 1 template is ≥3cm thick and the template size corresponds to the design size of the rectangular reserved trough 1. The grouting cavity 10 inside the reserved trough 1 is preferably 5cm wide at the bottom, 7cm wide at the top, and 10cm deep. A rough texture is formed on the inside of the template.

[0030] After the template installation and rebar binding are completed, concrete pouring is carried out to ensure that the bottom concrete of the communication signal trough 2 and the reserved trough 1 are poured and formed simultaneously, so as to ensure that a solid overall structure is formed between the two. After the concrete reaches a certain strength, the template is removed and the reserved trough 1 is inspected and cleaned.

[0031] The through ground wire is accurately laid to the bottom of the reserved trench 1 according to the design path. The position of the through ground wire is adjusted to ensure that it meets the relevant specifications. Finally, M20 cement mortar is poured into the reserved trench 1. During the pouring process, a small vibrator is used to compact the mortar, ensuring that the cement mortar is tightly bonded to the trench wall and the through ground wire, thus completing the sealing and protection of the through ground wire.

[0032] This invention connects the bottom of the communication signal channel 2 with the reserved slot 1 by placing the reserved slot 1 at the bottom of the channel 2 near the line side. During construction, it is formed by integral concrete casting, eliminating the need for additional complex secondary construction processes. The construction process is simple and easy to implement on-site. Furthermore, this invention only involves the formwork support structure, without increasing material and construction costs excessively. While ensuring project quality, it offers good economic benefits and engineering practicality.

[0033] In addition, after grouting, the cement mortar is completely confined within the groove and will not exceed the range of the rectangular reserved groove 1, which precisely ensures the internal clearance size of the communication signal groove 2, provides sufficient space for the installation and operation of communication signal equipment, and improves the performance of the communication signal groove 2.

[0034] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. A tunneling cable trough reservation slot structure, characterized by, include: The system includes a reserved slot, a grounding component, and a communication signal slot. The reserved slot is located at the bottom of the communication signal slot near the line side. The reserved slot has a rectangular structure and a filling cavity is provided inside the reserved slot. The filling cavity has an inverted trapezoidal structure. A connector is also provided inside the reserved slot. The ground wire extending from the communication signal slot passes through the reserved slot and enters the connector.

2. A tunnel cable trough pre-trenching structure according to claim 1, characterized in that: The infusion cavity has a depth of 10cm, a bottom inner width of 5cm, and a top inner width of 7cm.

3. A tunnel cable trough pre-trenching structure according to claim 1, characterized in that: The wall thickness of the reserved groove is ≥3cm.

4. A tunnel cable trough pre-trenching structure according to claim 1, characterized in that: The inner side of the reserved groove wall is provided with a rough texture.

5. A tunnel cable trough pre-trenching structure according to claim 1, characterized in that: It also includes a grounding component, which includes a grounding device, a connecting steel bar, and a second grounding terminal.

6. The tunnel cable trough reserved groove structure according to claim 5, characterized in that: The bottom of the reserved slot is provided with a first grounding terminal, which is connected to the grounding device.

7. A tunnel cable trough pre-chamber structure according to claim 6, characterized in that: One end of the connecting steel bar is connected to the grounding device, and the other end is connected to the second grounding terminal.

8. A tunnel cable trough pre-trenching structure according to claim 7, characterized in that: The connecting steel bars also include longitudinal connecting steel bars, which are disposed near the second grounding terminal.

9. A tunnel cable trough pre-trenching structure according to claim 1, wherein: The connector is L-shaped.

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