Cable trench and side trench construction method and secondary lining device

Abstract

The invention relates to the technical field of tunnel construction, in particular to a cable trench and side trench construction method and a secondary lining device. The cable trench and side trench construction method comprises the following steps that when a tunnel is subjected to secondary lining, the outer side wall of a cable trench is poured at the same time; and after the outer side wall of the cable groove is solidified, the inner side wall of the cable groove is poured, and the side groove and the inner side wall of the cable groove are poured at the same time. By adopting the cable trench and side trench construction method disclosed by the embodiment of the invention, the outer side wall of the cable trench can be poured during secondary lining, the step of chiseling the secondary lining after the secondary lining is solidified is avoided, and after the outer side wall of the cable trench is solidified, the inner side wall of the cable trench and the trench are poured at the same time, so that the construction efficiency is improved. The step of chiseling the inner side wall of the cable trench after the inner side wall of the cable trench is solidified is avoided, the construction steps are effectively reduced, the construction time is shortened, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a cable trench and side trench construction method and a secondary lining device. Background Art

[0002] Cable trenches for laying cables and side trenches for drainage are usually set up in tunnels. The current construction method of tunnel cable trenches and side trenches is usually to cast the cable trenches and side trenches after the secondary lining is carried out by the lining trolley.

[0003] The above construction method first needs to wait for the concrete of the secondary lining to solidify, then roughen the concrete after the secondary lining, and then set the cable trench template for pouring. After the cable trench concrete solidifies, the cable trench is roughened, and then the side trench template is set for pouring. The above construction method has many construction steps, a long construction time, and a low construction efficiency. Summary of the invention

[0004] In view of this, the present invention provides a cable trench and side ditch construction method and a secondary lining device to solve the problems of the existing construction method, which has many construction steps, long construction time and low construction efficiency.

[0005] In a first aspect, the present invention provides a method for constructing a cable trench and a side ditch, comprising the following steps:

[0006] When the tunnel is relined, the outer wall of the cable trench is poured at the same time;

[0007] After the outer wall of the cable trench solidifies, the inner wall of the cable trench is poured, and the side trench and the inner wall of the cable trench are poured at the same time.

[0008] Beneficial effects:

[0009] By adopting the cable trench and side ditch construction method disclosed in the present embodiment, the outer wall of the cable trench can be cast during the secondary lining, so that the secondary lining and the outer wall of the cable trench can be cast in an integrated manner, reducing the step of roughening the secondary lining after the secondary lining solidifies. After the outer wall of the cable trench solidifies, the inner wall of the cable trench and the groove are cast at the same time, so that the inner wall of the cable trench and the side ditch can be cast in an integrated manner, reducing the step of roughening the inner wall of the cable trench after the inner wall of the cable trench solidifies, effectively reducing the construction steps, reducing the construction time, and improving the construction efficiency. In the same time, the cable trench and side ditch construction method disclosed in the present embodiment can cast longer cable trenches and side trenches.

[0010] In an optional embodiment, when pouring the inner wall of the cable trench, the pouring is performed in layers and the concrete is vibrated.

[0011] Beneficial effects:

[0012] After each layer is poured, a vibrator is inserted into the inner wall formwork of the cable trench to vibrate the concrete. This helps to expel the gas in the concrete, prevent the presence of bubbles in the concrete, and ensure the compactness and quality of the concrete.

[0013] In an optional embodiment, before pouring the inner side wall of the cable trench, holes are punched in a preset cable trench base, steel bars are inserted into the holes, and then the cable trench base is poured.

[0014] Beneficial effects:

[0015] Casting the cable trench base before casting the inner wall of the cable trench is beneficial to increase the connectivity between the inner wall of the cable trench and the cable trench base and ensure the integrity of the cable trench.

[0016] In an optional embodiment, the thickness of the steel bar protective layer is controlled by the drilling position, the reserved length of the steel bar and the entry depth.

[0017] Beneficial effects:

[0018] The thickness of the steel bar protective layer can be controlled by setting the punching position of the cable trench base, the reserved length of the steel bar and the depth of the first hole. The thickness of the steel bar protective layer can effectively protect the steel bar and prevent the cable trench base from weathering and damage due to long-term use, resulting in exposed steel bars, accelerated weathering or aging of the steel bars, and affecting the stability of the overall structure of the cable trench.

[0019] In an optional embodiment, a fixed point is set on the base of the cable trench to determine the position of the inner wall template of the cable trench, and then the inner wall and side trench of the cable trench are cast.

[0020] Beneficial effects:

[0021] By setting fixed points, the accuracy of the installation position of the inner wall template of the cable trench and the top elevation can be effectively guaranteed, thereby ensuring the straightness of the side wall line and the pouring height of the cable trench after pouring.

[0022] In an optional implementation, after the steel bars are installed, the steel bars are tied with auxiliary bars.

[0023] Beneficial effects:

[0024] Adjacent steel bars are tied together using auxiliary bars so that the steel bars are constructed as a whole through the tying of the auxiliary bars, which helps to improve the stability and strength of the steel bars.

[0025] In an optional embodiment, the primary casting surface needs to be cleaned and flushed before the secondary lining.

[0026] Beneficial effects:

[0027] It is helpful to ensure that there is no water and debris on the surface of the first poured concrete, and to ensure the quality of the concrete during the secondary lining.

[0028] In an optional implementation, after the cable trench and the side ditch are cast, they need to be watered and maintained to ensure that the concrete surfaces of the cable trench and the side ditch are moist.

[0029] Beneficial effects:

[0030] It can effectively prevent the cable trench and side ditch concrete from cracking, thus affecting the project quality, and also avoid increasing the repair time and affecting the overall construction time.

[0031] In a second aspect, the present invention further provides a secondary lining device, which is applied to the cable trench and side ditch construction method in any of the above schemes, comprising:

[0032] Lining trolleys;

[0033] The cable trench outer side wall template is detachably arranged on both sides of the lining trolley, and the cable trench outer side wall template is suitable for moving to the construction position with the lining trolley.

[0034] Beneficial effects:

[0035] A cable trench outer wall template is set on the lining trolley. When the tunnel is subjected to secondary lining, the cable trench outer wall can be cast at the same time, which improves the construction efficiency and reduces the construction steps and time. At the same time, the cable trench outer wall template is detachably connected to the secondary lining, so that different sizes of cable trench outer walls can be selected according to the cable trench outer walls to be cast, thereby improving the practicability of the secondary lining device.

[0036] In an optional embodiment, the outer wall template of the cable trench includes a first module and a second module respectively perpendicular to the horizontal direction, one end of the first module is detachably connected to the lining trolley, the other end of the first module faces the ground, the second module is arranged at the connection between the first module and the lining trolley and is located on the side of the first module facing the tunnel wall, one side of the second module is in contact with the side of the first module, the second module is fixedly connected to the first module, and the lining trolley, the second module and the first module are constructed as a stepped structure.

[0037] Beneficial effects:

[0038] The stepped structure constructed by the lining trolley, the second module and the first module can make the outer side wall of the cast cable trench also have the stepped structure. When the cable trench is cast and the wiring is completed, the two sides of the cable trench cover plate can be respectively arranged in the stepped structures of the outer side wall of the cable trench and the inner side wall of the cable trench. The stepped structures of the outer side wall of the cable trench and the inner side wall of the cable trench constitute the installation position of the cable trench cover plate. The cable trench cover plate can close the cable trench to prevent debris from entering the cable trench, and can also protect the cables in the cable trench. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 Schematic diagram of a cable trench and a side trench in an embodiment of the present invention;

[0041] Figure 2 It is a schematic diagram of a cable trench construction device in an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] 1. Cable trench outer wall; 2. Cable trench inner wall; 3. Side ditch; 4. Cable trench base; 5. Secondary lining; 6. Lining trolley; 7. Cable trench outer wall template; 71. First module; 72. Second module. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0045] Combine the following Figure 1 , describing an embodiment of the present invention.

[0046] According to an embodiment of the present invention, on the one hand, a cable trench and side trench construction method is provided, comprising the following steps:

[0047] When the tunnel is subjected to secondary lining 5, the outer side wall 1 of the cable trench is poured at the same time;

[0048] After the outer wall 1 of the cable trench solidifies, the inner wall 2 of the cable trench is poured, and the side trench 3 and the inner wall 2 of the cable trench are poured at the same time.

[0049] Specifically, before the secondary lining 5, it is necessary to set up a wire conduit in the tunnel, and the wires of the tunnel lights are set in the wire conduit, which will be pre-buried in the secondary lining 5. When installing the wire conduit, the position, quantity, specifications, etc. must be accurate, and the protection of the pre-wire conduit opening must be strengthened to ensure that the wire conduit opening is exposed to the outer wall 1 of the cable trench, so that the wires in the wire conduit can be extended into the cable trench to connect with the cable. After the installation of the wire conduit is completed, the secondary lining 5 can be carried out. When the tunnel is subjected to the secondary lining 5, the outer wall 1 of the cable trench can be poured at the same time by using the outer wall template 7 of the cable trench, so that the secondary lining 5 and the outer wall 1 of the cable trench are cast in an integrated manner. After the secondary lining 5 and the casting of the outer wall 1 of the cable trench are completed and solidified, the inner wall 2 of the cable trench and the side trench 3 are cast at the same time, so that the inner wall 2 of the cable trench and the side trench 3 are cast in an integrated manner.

[0050] In this embodiment, the cable trench inner wall template and the side trench template are used to cast the cable trench inner wall 2 and the side trench 3. The cable trench inner wall template is connected to the side trench template, so that the side trench 3 can be cast at the same time as the cable trench inner wall 2 is cast. Figure 1 In the figure, the outer wall 1 of the cable trench is located on the left side of the cable trench, the inner wall 2 of the cable trench is located on the right side of the cable trench, and the outer wall of the side trench is located on the left side of the side trench 3.

[0051] It should be noted that, by adopting the cable trench and side trench 3 construction method disclosed in the present embodiment, the outer wall 1 of the cable trench can be cast during the secondary lining 5, so that the secondary lining 5 and the outer wall 1 of the cable trench can be cast in an integrated manner, reducing the step of roughening the secondary lining 5 after the secondary lining 5 solidifies. After the outer wall 1 of the cable trench solidifies, the inner wall 2 of the cable trench and the trench are cast at the same time, so that the inner wall 2 of the cable trench and the side trench 3 can be cast in an integrated manner, and the step of roughening the inner wall 2 of the cable trench after the inner wall 2 of the cable trench solidifies is eliminated, which effectively reduces the construction steps, reduces the construction time, and improves the construction efficiency. In the same time, the cable trench and side trench 3 construction method disclosed in the present embodiment can cast longer cable trenches and side trenches 3.

[0052] In some embodiments, before the secondary lining 5, the primary casting surface needs to be cleaned and flushed.

[0053] In this embodiment, after the installation of the electric wire tube is completed, the first poured concrete surface needs to be cleaned and flushed to ensure that there is no water and debris on the first poured concrete surface to ensure the quality of the secondary lining 5 concrete.

[0054] In some embodiments, before pouring the inner side wall 2 of the cable trench, holes are punched in the preset cable trench base 4, steel bars are inserted into the holes, and then the cable trench base 4 is poured.

[0055] In this embodiment, after the outer wall 1 of the cable trench solidifies, the cable trench base 4 needs to be cast first, and then the inner wall 2 of the cable trench is cast. When casting the cable trench base 4, it is necessary to first punch holes in the cable trench base 4, set the cable trench base 4 to the position of the cable trench base 4 in the construction requirements, insert the steel bars into the holes and cast the cable trench base 4, and after the cable trench base 4 solidifies, use the cable trench inner wall template and the side trench template to cast the cable trench inner wall 2 and the side trench 3.

[0056] It should be noted that the steel bar has a first section parallel to the horizontal plane and a second section parallel to the direction of gravity. One end of the first section is fixedly connected to one end of the second section to form an L-shaped structure. The first section is arranged in a hole set in the cable trench base 4. When the cable trench base 4 is cast, the second section extends out of the top surface of the concrete of the cable trench base 4. When the inner wall 2 of the cable trench is cast, the second section will be cast in the inner wall 2 of the cable trench to increase the connectivity between the inner wall 2 of the cable trench and the cable trench base 4, thereby ensuring the integrity of the cable trench. At the same time, it can also improve the firmness of the inner wall 2 of the cable trench and increase the service life of the inner wall 2 of the cable trench.

[0057] In some embodiments, the thickness of the steel bar protective layer is controlled by the drilling position, the reserved length of the steel bar and the hole depth.

[0058] Specifically, the thickness of the steel bar protective layer is the thickness of the concrete between the first section of the steel bar and the top surface of the cable trench base 4. The thickness of the steel bar protective layer can be controlled by setting the punching position of the cable trench base 4, the reserved length of the steel bar and the depth of the first section of the hole. Preferably, in this embodiment, the thickness of the steel bar protective layer is 2 cm. The thickness of the steel bar protective layer can effectively protect the steel bar, prevent the cable trench base 4 from weathering and damage due to long-term use, resulting in the steel bar being exposed, accelerating the weathering or aging of the steel bar, and affecting the stability of the overall structure of the cable trench.

[0059] In some embodiments, a fixed point is set on the cable trench base 4 to determine the position of the inner side wall template of the cable trench, and then the inner side wall 2 and the side trench 3 of the cable trench are cast.

[0060] In this embodiment, after the cable trench base 4 solidifies, a fixed point is first set on the cable trench base 4 to determine the position of the cable trench inner wall template. After the position is determined, the cable trench inner wall template and the side trench template can be set to cast the cable trench inner wall 2 and the side trench 3. By setting the fixed point, the accuracy of the installation position of the cable trench inner wall template and the top elevation can be effectively guaranteed, thereby ensuring the straightness of the cable trench side wall line after casting and the casting height.

[0061] In some embodiments, after the steel bars are installed, they are tied with auxiliary bars.

[0062] In this embodiment, after the first section of the steel bar is set in the hole of the cable trench base 4, the adjacent steel bars are tied with auxiliary bars, so that the steel bars are constructed as a whole through the binding of the auxiliary bars, which helps to improve the stability and strength of the steel bars. Preferably, the auxiliary bars are also steel bars.

[0063] In some embodiments, when pouring the inner side wall 2 of the cable trench, the pouring is performed in layers and the concrete is vibrated.

[0064] Specifically, the inner wall 2 of the cable trench is poured in layers. After each layer is poured, a vibrator is inserted into the inner wall template of the cable trench to vibrate the concrete, which is beneficial to expel the gas in the concrete, prevent the presence of bubbles in the concrete, and ensure the compactness and quality of the concrete.

[0065] In some embodiments, after the cable trench and the side trench 3 are poured, they need to be watered for maintenance to ensure that the concrete surfaces of the cable trench and the side trench 3 are moist.

[0066] Specifically, after the cable trench and the side trench 3 are poured and solidified and removed from the mold, the cable trench and the side trench 3 need to be watered and cured to ensure that the concrete surface of the cable trench and the side trench 3 is moist. Preferably, in this embodiment, the curing time is 14 days. Watering and curing the cable trench and the side trench 3 can effectively prevent the concrete of the cable trench and the side trench 3 from cracking, thereby affecting the quality of the project, and can also avoid increasing the repair time and affecting the overall construction time.

[0067] Preferably, in this embodiment, the cable trench outer wall template 7, the cable trench inner wall template and the side trench template are all steel templates.

[0068] According to an embodiment of the present invention, on the other hand, a secondary lining device is provided, which is applied to the cable trench and side ditch construction method in the above embodiment, and includes: a lining trolley 6 and a cable trench outer side wall template 7.

[0069] Specifically, the cable trench outer side wall template 7 is detachably arranged on both sides of the lining trolley 6, and the cable trench outer side wall template 7 is suitable for moving with the lining trolley 6 to the construction position.

[0070] In this embodiment, if Figure 2 As shown, the cable trench outer wall template 7 is detachably arranged on both sides of the lining trolley 6. When it is necessary to cast the cable trench, the cable trench outer wall template 7 is installed on the lining trolley 6. The cable trench outer wall template 7 can be moved with the lining trolley 6 from the tunnel entrance to the location where construction is required. When the tunnel is subjected to secondary lining 5, the cable trench outer wall 1 can be cast simultaneously through the cable trench outer wall template 7, so that the cable trench outer wall 1 and the secondary lining 5 are cast in an integrated manner. After the concrete of the cable trench outer wall 1 and the secondary lining 5 are solidified, the lining trolley 6 continues to move into the tunnel through the driving structure and continues to cast the secondary lining 5 and the cable trench outer wall 1.

[0071] It should be noted that the cable trench outer wall template 7 can be manufactured according to the size of the cable trench outer wall 1 to be cast, ensuring that the height of the cable trench outer wall 1 after casting is the same as the construction requirements. At the same time, before the secondary lining 5, it is necessary to carry out measurement, lofting and verification processes to ensure the accurate positioning of the lining trolley 6 and the straightness of the cable trench outer wall 1. By adopting the secondary lining device disclosed in this embodiment, the cable trench outer wall template 7 is set on the lining trolley 6, and the cable trench outer wall 1 can be cast at the same time when the tunnel is subjected to the secondary lining 5, which improves the construction efficiency and reduces the construction steps and construction time. At the same time, the cable trench outer wall template 7 is detachably connected to the secondary lining 5, so that the cable trench outer wall 1 of different sizes can be selected according to the cable trench outer wall 1 to be cast, thereby improving the practicality of the secondary lining device.

[0072] In some embodiments, the outer wall template 7 of the cable trench includes a first module 71 and a second module 72 which are respectively perpendicular to the horizontal direction, one end of the first module 71 is detachably connected to the lining trolley 6, the other end of the first module 71 faces the ground, the second module 72 is arranged at the connection between the first module 71 and the lining trolley 6 and is located on the side of the first module 71 facing the tunnel wall, one side of the second module 72 is in contact with the side of the first module 71, the second module 72 is fixedly connected to the first module 71, and the lining trolley 6, the second module 72 and the first module 71 are constructed as a stepped structure.

[0073] In this embodiment, if Figure 2 As shown, the cable trench outer wall template 7 includes a first module 71 and a second module 72. The first module 71 and the second module 72 are parallel to each other and perpendicular to the horizontal direction. The height of the first module 71 is greater than the height of the second module 72. The height of the first module 71 is the height of the cable trench outer wall 1. Figure 2In the figure, the upper end of the first module 71 is detachably connected to the lining trolley 6, the lower end of the first module 71 faces the ground, the second module 72 is arranged on the left side of the first module 71 and is located at the connection between the first module 71 and the lining trolley 6, the right side surface of the second module 72 is fitted with the left side surface of the first module 71, and the second module 72 is fixedly connected to the first module 71. Preferably, the first module 71 and the second module 72 are an integrated structure to avoid a gap between the first module 71 and the second module 72, thereby affecting the casting effect. The lining trolley 6, the second module 72 and the first module 71 are constructed as a stepped structure, so that the outer side wall 1 of the cast cable trench also has the stepped structure, and the inner side wall 2 of the cable trench also has a corresponding stepped structure after casting. When the cable trench is cast and the wiring is completed, the two sides of the cable trench cover plate can be respectively arranged in the stepped structures of the outer side wall 1 of the cable trench and the inner side wall 2 of the cable trench. The stepped structures of the outer side wall 1 of the cable trench and the inner side wall 2 of the cable trench constitute the installation position of the cable trench cover plate. The cable trench cover plate can close the cable trench to prevent debris from entering the cable trench, and can also protect the cables in the cable trench.

[0074] Preferably, the height of the second module 72 is equal to the depth of the cable trench cover installation position.

[0075] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A cable trench and side ditch construction method, characterized in that: The following steps are involved: When the tunnel is subjected to secondary lining (5), the outer wall (1) of the cable trench is poured at the same time; After the outer wall (1) of the cable trench solidifies, the inner wall (2) of the cable trench is poured, and the side trench (3) and the inner wall (2) of the cable trench are poured simultaneously.

2. The cable trench and side ditch construction method according to claim 1, characterized in that: When pouring the inner wall (2) of the cable trench, pouring is performed in layers and the concrete is vibrated.

3. The cable trench and side ditch construction method according to claim 1, characterized in that: Before pouring the inner side wall (2) of the cable trench, a hole is punched in the preset cable trench base (4), and steel bars are inserted into the hole, and then the cable trench base (4) is poured.

4. The cable trench and side ditch construction method according to claim 3, characterized in that: The thickness of the steel bar protective layer is controlled by the drilling position, the reserved length of the steel bar and the depth of the hole.

5. The cable trench and side ditch construction method according to claim 3, characterized in that: A fixing point is set on the cable trench base (4) to determine the position of the cable trench inner side wall (2) template, and then the cable trench inner side wall (2) and the side trench (3) are cast.

6. The cable trench and side ditch construction method according to claim 3, characterized in that: After the steel bars are installed, use auxiliary reinforcement to tie them up.

7. The cable trench and side ditch construction method according to any one of claims 1 to 6, characterized in that: Before the secondary lining (5), the primary casting surface needs to be cleaned and flushed.

8. The cable trench and side ditch construction method according to claim 7, characterized in that: After the cable trench and the side trench (3) are poured, they need to be watered for maintenance to ensure that the concrete surfaces of the cable trench and the side trench (3) are moist.

9. A secondary lining device, applied to the cable trench and side ditch (3) construction method according to any one of claims 1 to 8, characterized in that: include: Lining trolley (6); The cable trench outer wall template (7) is detachably arranged on both sides of the lining trolley (6), and the cable trench outer wall template (7) is suitable for moving with the lining trolley (6) to a construction position.

10. The secondary lining device according to claim 9, characterized in that: The cable trench outer wall template (7) comprises a first module (71) and a second module (72) which are respectively perpendicular to the horizontal direction; one end of the first module (71) is detachably connected to the lining trolley (6); the other end of the first module (71) faces the ground; the second module (72) is arranged at the connection between the first module (71) and the lining trolley (6) and is located on the side of the first module (71) facing the tunnel wall; one side of the second module (72) is in contact with the side of the first module (71); the second module (72) is fixedly connected to the first module (71); and the lining trolley (6), the second module (72) and the first module (71) are constructed as a stepped structure.

Images