Energy tunnel segment and construction method thereof

Abstract

The application discloses an energy tunnel segment and a construction method thereof, and belongs to the technical field of tunnel construction, and solves the problems of complex structure and complicated connection of a tunnel segment in the prior art; the energy tunnel segment comprises a segment body, a connecting plate assembly is arranged in the segment body, and adjacent segment bodies are connected through the connecting plate assembly; heat exchange pipes are arranged in the segment body, and connecting head assemblies are arranged at the ends of the heat exchange pipes; the connecting head assemblies are connected with the heat exchange pipes in adjacent segment bodies; and a heat preservation layer is connected to the inner side of the segment body; in the application, connecting plates are designed to connect two adjacent segment bodies; the connecting plates are pushed along the strip-shaped sliding grooves until the ends of the connecting plates are embedded into segment connecting female grooves of adjacent segment bodies, so that the two segment bodies can be connected; the connecting mode is simple to operate, and the connecting strength is high after connection; and after connection, the connected segment is limited by a connecting limiting assembly, so that the reliability of segment connection is ensured.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and in particular to an energy tunnel segment and its construction method. Background Technology

[0002] Using a tunnel boring machine (TBM) for tunnel excavation and segment laying offers significant advantages in construction efficiency and safety compared to mining methods. TBM segments are crucial prefabricated components in TBM tunnel construction. By pre-embedding heat exchange pipes within the segments, shallow geothermal energy can be extracted, creating an "energy tunnel" that can be used for cooling high-temperature tunnels and de-icing / snow melting at tunnel entrances.

[0003] Currently, existing technologies have proposed various forms of energy tunnel shield segments for construction and connection of prefabricated heat exchange tubes. For example: Reference 1: Wu Yuanhao, Liu Yifei, et al.'s Chinese invention patent discloses a construction method for heat exchange tubes in energy shield tunnel segments (Patent No.: CN202410013180.0; application announcement date: May 10, 2024). It proposes using a tube feeder to assist in the layout of heat exchange tubes, but lacks description of the connection methods between segments. Reference 2: Ji Yongming, Hu Songtao, et al.'s Chinese invention patent discloses a method for prefabricating and connecting tunnel energy segments used in shield tunneling (Patent No.: CN201911228441.6; application announcement date: March 24, 2020). It innovates the layout of heat exchange tubes by connecting multiple capillary tubes in parallel with a main pipe, which can improve the risk resistance of the heat exchange tubes. However, parallel connection increases the total flow rate and reduces the heat exchange efficiency per unit area. Reference 3: Wu Yuanhao, Han Lei, et al. disclosed an energy tube segment in their Chinese invention patent application (Patent No.: CN202311068024.6; Application Publication Date: October 20, 2023). This invention proposes bonding heat exchange tubes to the outside of the tube segment. While this improves heat exchange efficiency, the lack of pipe protection measures significantly increases the risk of damage to the heat exchange tubes. Reference 4: Ma Chunjing, Li Jun, Lin Yu, et al. disclosed an assembled energy tube segment assembly and its connection method in their Chinese invention patent application (Patent No.: CN202410126470.6; Application Publication Date: April 5, 2024). This invention proposes an overall connection method for energy tunnel tube segments, but the specific connections between each segment are unclear. Reference 5: A Chinese invention patent application filed by Chu Zhaoxiang, Lu Feifan, Li Xiaozhao, et al. discloses an energy tunnel segment with an auxiliary connection structure and a rapid splicing method (Patent No.: CN 202310526096.4; Application Publication Date: July 18, 2023); and Reference 6: A Chinese invention patent application filed by Chu Zhaoxiang, Wang Yiming, Li Xiaozhao, et al. discloses an energy tunnel segment with a limiting structure and its usage method (Patent No.: CN202310792478.1; Application Publication Date: September 5, 2023). Both of these patents propose energy tunnel segments with limiting structures, which can improve the connection quality of the segments, but the complex structure makes construction difficult. Reference 7: A Chinese invention patent application filed by Gao Penghui, Cao An, Zhang Donghai, et al. discloses a connector for geothermal extraction pipeline of subway tunnel segments (patent number: CN202311414876.6; application announcement date: January 2, 2024). It proposes a connector for heat exchange pipe of energy segments with pressure relief outlet, but the structure is complex and difficult to construct in a limited space.

[0004] Therefore, a reasonable and simple method for connecting tunnel segments and heat exchanger tubes is crucial to the construction quality and installation efficiency of energy tunnels. Thus, developing an energy tunnel segment design for subway stations is particularly important, given the current complex and unreasonable structural forms and connection methods of energy tunnel segments. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an energy tunnel segment and its construction method, solving the problems of complex tunnel segment structure and cumbersome connection in existing technologies.

[0006] Firstly, in order to achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An energy tunnel segment includes a segment body, a connecting plate assembly disposed inside the segment body, and adjacent segment bodies are connected by the connecting plate assembly; a heat exchange tube is laid inside the segment body, and a connector assembly is disposed at the end of the heat exchange tube; the connector assembly is connected to the heat exchange tube in the adjacent segment body; and an insulation layer is connected to the inner side of the segment body.

[0008] In this scheme, a connecting plate assembly is installed inside the tube segment body, which can connect adjacent tube segments for easy connection; the heat exchange tubes inside the tube segment body can extract geothermal energy, and the insulation layer is used to insulate the tube segment body and prevent heat loss from the heat exchange tubes.

[0009] Furthermore, the connecting plate assembly includes a connecting plate, which is an arc-shaped structure with the same curvature as the segment body; a segment connecting male groove and a segment connecting female groove are respectively opened at both ends of the segment body; the connecting plate is accommodated in the segment connecting male groove; a strip-shaped groove is opened on the inner side of the segment body, and the strip-shaped groove is opened along the length direction of the connecting plate; the strip-shaped groove communicates with the inner cavity of the segment connecting male groove; a connecting limiting component is also provided in the segment body.

[0010] In this scheme, when connecting adjacent segments, a steel pipe or other driving component is inserted into the strip groove, and the connecting plate is pushed to slide along the strip groove until the end of the connecting plate is embedded in the segment connection groove of the adjacent segment. This allows the two segments to be connected. This connection method is simple to operate and has high connection strength after connection.

[0011] Furthermore, a hand hole is provided on the inner side of the segment body; a segment limiting hole, a segment driving groove and a segment limiting groove are provided on the connecting plate;

[0012] The connecting limit assembly includes a hollow cylindrical limiter and a limit screw. The limit screw passes through the hollow cylindrical limiter and fixes the hollow cylindrical limiter to the bottom of the hand hole. A return spring is connected between the hollow cylindrical limiter and the bottom of the hand hole.

[0013] In this design, after the end of the connecting plate is embedded into the segment connection groove of the adjacent segment body, a screw sleeve is passed through the hand hole and the segment limiting hole, and the limiting screw is unscrewed. At this time, under the elastic force of the return spring, the hollow cylindrical limiter is pushed into the segment limiting groove to limit the connecting segment, thus preventing the connecting segment from moving inside the segment connection male groove and segment connection female groove of the adjacent segment body; ensuring the reliability of the segment connection.

[0014] Furthermore, the connector assembly includes an outer connector and an inner connector, which are respectively connected to both ends of the heat exchange tube; two adjacent heat exchange tubes are connected through the outer connector and the inner connector.

[0015] Two heat exchange tube connection grooves are opened at both ends of the tube body, and the external joint and the internal joint are located in the two heat exchange tube connection grooves respectively.

[0016] In this design, a heat exchange tube connection groove is provided to provide operating space for the connection of the inner and outer joints, thus avoiding the inability to connect the heat exchange tubes inside the adjacent tube body after the two tube bodies are connected.

[0017] Furthermore, the external connector includes a flared connector, one end of which is connected to a heat exchange tube, and the other end of which is connected to a fixed plate arranged in an annular array. The three fixed plates are respectively inserted into the three through holes of the hollow sealing ring. Three locking clips are respectively connected to the flared connector via three rotating shafts, with the rotating shafts located in the middle of the locking clips. A locking spring is provided between the end of the locking clip near the heat exchange tube and the flared connector. The end of the locking clip near the fixed plate abuts against the outer surface of the hollow sealing ring, with the abutment position located between two fixed plates.

[0018] One end of the inner connector is connected to the heat exchange tube; the other end of the inner connector is located in the middle of the hollow sealing ring; the locking clamp presses the hollow sealing ring into the connecting groove on the surface of the inner connector; a rubber gasket is filled between the inner connector and the flared connector.

[0019] In this design, when connecting the heat exchange tubes in the assembled tube body, pinch the end of the locking clamp with the locking spring and insert the inner connector into the middle of the hollow sealing ring; release the locking clamp, and under the elastic force of the locking spring, the end of the locking clamp near the hollow sealing ring retracts inward, squeezing the hollow sealing ring into the connecting groove on the surface of the inner connector; thus achieving the connection between the outer connector and the inner connector. This design facilitates the connection of the heat exchange tubes, eliminates the need for heat fusion connection of the pipeline on the construction site, and simplifies construction.

[0020] Furthermore, the outer and inner joints have anti-slip grooves on the outer surface of the end used to connect the heat exchange tube.

[0021] Secondly, based on the energy tunnel segments provided in the first aspect, the present invention provides a construction method for energy tunnel segments, comprising the following steps:

[0022] S1: Preparation of the tube segment body;

[0023] S2: Install the tunnel segment body inside the tunnel;

[0024] S3: Cast an insulation layer on the inside of the tunnel segment body.

[0025] In this scheme, the tunnel segments are first prepared and assembled, and then the insulation layer is poured. This design ensures that the poured insulation layer can cover the assembled tunnel segments and seal the gaps between them, resulting in good sealing and insulation performance.

[0026] Furthermore, S1 includes:

[0027] S101: Place the steel cage and fix the heat exchange tubes on the steel cage;

[0028] S102: Connect external and internal connectors to both ends of the heat exchange tube respectively;

[0029] S103: Casting out the tunnel segment body;

[0030] S104: After the segment body has been cured and formed, use the limit screw to fix the hollow cylindrical limiter to the bottom of the hand hole. After fixing, insert the connecting plate into the segment connection slot.

[0031] In this scheme, the segment body is cast using a steel cage as a frame, which can improve the strength of the segment body itself and also facilitate the fixing of the heat exchange tubes inside the segment body.

[0032] Furthermore, S2 includes:

[0033] S201: Install the tunnel segments one by one inside the tunnel; when connecting adjacent tunnel segments, insert the drive unit through the strip groove into the segment drive groove, and push the connecting plate along the strip groove so that the connecting plate is embedded in the segment connection mother groove of the adjacent tunnel segment.

[0034] S202: Use a screw sleeve to pass through the hand hole and the segment limiting hole, and unscrew the limiting screw. The hollow cylindrical limiter is embedded in the segment limiting groove under the elastic force of the return spring to limit the connection plate.

[0035] S203: Connect two adjacent heat exchange tubes in the heat exchange tube connection groove using an external connector and an internal connector.

[0036] In this solution, the connecting plate is moved between two adjacent segments to connect them, which is simple to operate; after connection, the hollow cylindrical limiter limits the connecting plate, ensuring a reliable connection.

[0037] Furthermore, S3 includes:

[0038] S301: After the installation of each ring segment body is completed, the thermal insulation template is fixed inside the tunnel section of the ring segment body using hollow grouting bolts;

[0039] S302: Adjust the hollow grouting bolts to maintain a grouting gap of 3-5cm between the insulation template and the inner wall of the segment body;

[0040] S303: Foamed insulation material is injected into the grouting gap through hollow grouting bolts; the foamed insulation material expands and fills the grouting gap and the heat exchanger tube connection groove and hardens to form an insulation layer;

[0041] S304: Remove the insulation template and reuse it.

[0042] The beneficial effects of this invention are:

[0043] In the energy tunnel segments provided by this invention, a connecting plate is designed to connect two adjacent segments. During connection, the connecting plate is pushed along the strip groove until the end of the connecting plate is embedded in the segment connecting groove of the adjacent segment, thus connecting the two segments. This connection method is simple to operate and has high connection strength after connection. After connection, a screw sleeve is passed through the hand hole and the segment limiting hole, and the limiting screw is unscrewed. At this time, under the elastic force of the return spring, the hollow cylindrical limiter is pushed into the segment limiting groove to limit the connection of the segments and ensure the reliability of the segment connection.

[0044] The heat exchanger tube is connected to an inner and outer connector. When connecting the heat exchanger tube, the inner connector is inserted into the middle of the hollow sealing ring. The locking clamp is released, and under the elastic force of the locking spring, the end of the locking clamp near the hollow sealing ring retracts inward, squeezing the hollow sealing ring into the connection groove on the surface of the inner connector. This achieves the connection between the outer and inner connectors. This design makes the heat exchanger tube connection convenient and eliminates the need for heat fusion connection of the pipeline on the construction site, solving the problem of heat exchanger tube connection in a limited space. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of an energy tunnel segment according to the present invention;

[0046] Figure 2 This is a schematic diagram of the structure of the segment body of the present invention;

[0047] Figure 3 This is a schematic cross-sectional view of the segment body of the present invention;

[0048] Figure 4 This is a schematic diagram of the connecting plate of the present invention;

[0049] Figure 5 This is a schematic diagram of the structure of the connecting and limiting component of the present invention;

[0050] Figure 6 This is a schematic diagram of the structure of the connecting and limiting component of the present invention;

[0051] Figure 7 This is a schematic diagram of the connector assembly of the present invention;

[0052] Figure 8 This is a schematic diagram of the external connector of the present invention;

[0053] Figure 9 This is a schematic cross-sectional view of the external connector of the present invention;

[0054] Figure 10 This is a schematic diagram of the locking clip of the present invention;

[0055] Figure 11 This is a schematic diagram of the internal connector of the present invention;

[0056] Figure 12 This is a schematic diagram of the structure of the present invention, in which an insulation layer is cast inside the segment body.

[0057] Figure label:

[0058] 1. Segment body; 11. Segment connection male groove; 12. Segment connection female groove; 13. Strip groove; 14. Hand hole; 15. Heat exchange tube connection groove; 2. Heat exchange tube; 3. Connector assembly; 31. External connector; 311. Flared connector; 312. Fixing plate; 313. Hollow sealing ring; 314. Rotating shaft; 315. Locking clamp; 316. Rubber gasket; 317. Locking spring; 32. Internal connector; 322. Connecting groove; 33. Anti-slip groove; 4. Connecting plate assembly; 41. Connecting plate; 411. Segment limiting hole; 412. Segment driving groove; 413. Segment limiting groove; 42. Connecting limiting assembly; 421. Hollow cylindrical limiter; 422. Limiting screw; 423. Return spring; 5. Insulation layer; 6. Reinforcing cage; 7. Hollow grouting bolt; 8. Insulation template; Detailed Implementation

[0059] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various modifications are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0060] Example 1

[0061] like Figure 1 and Figure 2As shown, this embodiment provides an energy tunnel segment that is simple to assemble and easy to connect, which solves the problems of complex structure and cumbersome connection of tunnel segments in the prior art; it specifically includes: segment body 1, connecting plate assembly 4, heat exchange tube 2 and connector assembly 3;

[0062] The tube body 1 is equipped with a connecting plate assembly 4 inside, and adjacent tube bodies 1 are connected by the connecting plate assembly 4; heat exchange tubes 2 are laid inside the tube body 1, and the ends of the heat exchange tubes 2 are equipped with connector assemblies 3; the connector assemblies 3 are connected to the heat exchange tubes 2 in the adjacent tube bodies 1; and an insulation layer 5 is connected to the inner side of the tube body 1.

[0063] like Figure 3 As shown, the connecting plate assembly 4 includes a connecting plate 41 and a connecting limiting assembly 42. The connecting plate 41 is an arc-shaped structure with the same curvature as the segment body 1. A segment connecting male groove 11 and a segment connecting female groove 12 are respectively opened at both ends of the segment body 1. The connecting plate 41 is accommodated within the segment connecting male groove 11. A strip-shaped groove 13 is opened on the inner side of the segment body 1, extending along the length of the connecting plate 41. The strip-shaped groove 13 communicates with the inner cavity of the segment connecting male groove 11. The connecting limiting assembly 42 is also provided inside the segment body 1. When adjacent segment bodies 1 are connected, a driving component such as a steel pipe is inserted into the strip-shaped groove 13, and the connecting plate 41 is pushed to slide along the strip-shaped groove 13 until the end of the connecting plate 41 is embedded in the segment connecting female groove 12 of the adjacent segment body 1. This connection method is simple to operate and provides high connection strength after connection.

[0064] like Figure 4 As shown, a hand hole 14 is provided on the inner side of the segment body 1; a segment limiting hole 411, a segment driving groove 412, and a segment limiting groove 413 are provided on the connecting plate 41; as shown Figure 5 and Figure 6 As shown, the connecting limiting assembly 42 includes a hollow cylindrical limiter 421 and a limiting screw 422. The limiting screw 422 passes through the hollow cylindrical limiter 421 and fixes the hollow cylindrical limiter 421 to the bottom of the hand hole 14. A return spring 423 is connected between the hollow cylindrical limiter 421 and the bottom of the hand hole 14. After the end of the connecting plate 41 is embedded into the segment connection female groove 12 of the adjacent segment body 1, a screw sleeve is passed through the hand hole 14 and the segment limiting hole 411, and the limiting screw 422 is unscrewed. At this time, under the elastic force of the return spring 423, the hollow cylindrical limiter 421 is pushed into the segment limiting groove 413 to limit the connecting segment, preventing the connecting segment from moving inside the segment connection male groove 11 and segment connection female groove 12 of the adjacent segment body 1; thus ensuring the reliability of the segment connection.

[0065] The connecting plate 41 is a precast iron component in the shape of an arc tile, with a length of 40-50cm, a thickness of 4-5cm, and a width of 10-15cm. Hot-rolled steel should be used as the material, and cold-rolled steel with high carbon content should not be used.

[0066] like Figure 4 As shown, a 4-6mm thick damping rubber is provided between the connecting plate 41 and the segment connecting male groove 11 and the segment connecting female groove 12 to avoid long-term vehicle vibration from damaging the tunnel segment connection structure.

[0067] like Figure 7 As shown, the connector assembly 3 includes an outer connector 31 and an inner connector 32, which are respectively connected to the two ends of the heat exchange tube 2. Two adjacent heat exchange tubes 2 are connected through the outer connector 31 and the inner connector 32. Two heat exchange tube connection grooves 15 are respectively opened at both ends of the tube body 1, and the outer connector 31 and the inner connector 32 are respectively located in the two heat exchange tube connection grooves 15. The heat exchange tube connection grooves 15 are designed to provide operating space for the connection of the inner connector 32 and the outer connector 31, so as to avoid the inability to connect the heat exchange tubes 2 inside the adjacent tube body 1 after the two tube bodies 1 are connected.

[0068] The outer and inner connectors 31 and 32 are used to connect the heat exchange tube 2. The outer surface of one end of the heat exchange tube 2 is provided with anti-slip grooves 33. When the tube body 1 is prepared, the heat exchange tube 2 can be hot-melted by a hot-melt machine. After hot-melting, it can be directly fitted into the anti-slip grooves 33 of the outer connector 31 and the inner connector 32.

[0069] like Figure 8 and Figure 9 As shown, the external connector 31 includes a flared connector 311, one end of which is connected to the heat exchange tube 2, and the other end of which is connected to a fixed plate 312 arranged in a ring. The three fixed plates 312 are respectively inserted into the three through holes of the hollow sealing ring 313. Three locking clips 315 are respectively connected to the flared connector 311 via three rotating shafts 314. The rotating shafts 314 are located in the middle of the locking clips 315. The locking clips 315 are saddle-shaped, wider at the front and narrower at the back. Figure 10 As shown. A locking spring 317 is provided between the end of the locking clip 315 near the heat exchange tube 2 and the flared joint 311; the end of the locking clip 315 near the fixing plate 312 abuts against the outer surface of the hollow sealing ring 313, and the abutting position is located in the middle of the two fixing plates 312; the hollow sealing ring 313 is made of rubber.

[0070] like Figure 11As shown, one end of the inner connector 32 is connected to the heat exchange tube 2; the other end of the inner connector 32 is located in the middle of the hollow sealing ring 313; the locking clip 315 presses the hollow sealing ring 313 into the connecting groove 322 on the surface of the inner connector 32; a rubber gasket 316 is filled between the inner connector 32 and the flared connector 311. When connecting the heat exchange tube 2, pinch one end of the locking clip 315 with the locking spring 317, and insert the inner connector 32 into the middle of the hollow sealing ring 313; release the locking clip 315, and under the elastic force of the locking spring 317, the end of the locking clip 315 near the hollow sealing ring 313 retracts inward, pressing the hollow sealing ring 313 into the connecting groove 322 on the surface of the inner connector 32; thus realizing the connection between the outer connector 31 and the inner connector 32. This design makes the connection of the heat exchange tube 2 convenient, eliminating the need for heat fusion connection of the pipeline on the construction site, and simplifying construction.

[0071] As a preferred embodiment, the heat exchange tube 2 can be made of polymer materials such as PE tube, PB tube, ABS tube, PPR tube, PP tube, and PERT tube.

[0072] Example 2

[0073] like Figures 1-12 As shown, this embodiment, based on the energy tunnel segments provided in Embodiment 1, provides a construction method for energy tunnel segments, including the following steps:

[0074] S1: Preparing the segment body 1; specifically including:

[0075] S101: Place the steel cage 6 and fix the heat exchange tube 2 on the steel cage 6; the heat exchange tube 2 is laid in an S-shape with a distribution spacing of 0.3 to 0.5 m; when laying the heat exchange tube 2, the position of the heat exchange tube 2 is staggered from the male groove 11 and the female groove 12 of the tube segment connection to avoid position interference that would cause the heat exchange tube 2 to be exposed in the groove after casting.

[0076] S102: Connect the external connector 31 and the internal connector 32 to both ends of the heat exchange tube 2 respectively; when connecting, use a hot melt machine to heat the end of the heat exchange tube 2, and after heating, directly put it on the external connector 31 or the internal connector 32.

[0077] S103: Complete the batch casting production of segment body 1 in the segment prefabrication plant area;

[0078] S104: After the segment body 1 has been cured and formed, use the limit screw 422 to fix the hollow cylindrical limiter 421 to the bottom of the hand hole 14. After fixing, insert the connecting plate 41 into the segment connecting groove 11.

[0079] S2: Installing the tunnel segment body 1 inside the tunnel; specifically including:

[0080] S201: Install the segment body 1 piece by piece inside the tunnel. During installation, pay attention to the orientation of adjacent segment bodies 1 within each ring. The segment connection male groove 11 and segment connection female groove 12 of adjacent segment bodies at the same construction joint should correspond to each other. When connecting adjacent segment bodies 1, insert the driving component through the strip groove 13 into the segment driving groove 412, and push the connecting plate 41 along the strip groove 13 so that the connecting plate 41 is embedded in the segment connection female groove 12 of the adjacent segment body 1. The driving component is preferably a rod such as a steel pipe.

[0081] S202: Use a screw sleeve to pass through the hand hole 14 and the segment limiting hole 411, and unscrew the limiting screw 422. The hollow cylindrical limiter 421 is embedded in the segment limiting groove 413 under the elastic force of the return spring 423 to limit the connection plate 41.

[0082] S203: Connect two adjacent heat exchange tubes 2 in the heat exchange tube connection groove 15 through the external connector 31 and the internal connector 32.

[0083] S3: Cast the insulation layer 5 inside the segment body 1, such as Figure 12 As shown; specifically including:

[0084] S301: After the installation of each ring segment body 1 is completed, the thermal insulation template 8 is fixed inside the tunnel section of the ring segment body 1 using hollow grouting bolts 7.

[0085] S302: Adjust the hollow grouting bolts 7 to maintain a grouting gap of 3-5cm between the thermal insulation template 8 and the inner wall of the segment body 1;

[0086] S303: Foamed insulation material is injected into the grouting gap through the hollow grouting bolt 7; after the foamed insulation material expands and fills the grouting gap and the heat exchange pipe connection groove 15 and hardens, an insulation layer 5 is formed; the foamed insulation material is preferably a B1-grade fireproof foamed insulation material.

[0087] S304: Remove insulation template 8 and reuse it.

[0088] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of the invention and should be understood as not limiting the scope of protection of the invention to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the technical teachings disclosed herein without departing from the spirit of the invention, and these modifications and combinations are still within the scope of protection of the invention.

Claims

1. An energy tunnel segment, characterized in that: The system includes a tube body (1), a connecting plate assembly (4) is provided inside the tube body (1), and adjacent tube bodies (1) are connected by the connecting plate assembly (4); heat exchange tubes (2) are laid inside the tube body (1), and a connector assembly (3) is provided at the end of the heat exchange tubes (2); the connector assembly (3) is connected to the heat exchange tubes (2) in the adjacent tube body (1); and an insulation layer (5) is connected to the inside of the tube body (1). The connecting plate assembly (4) includes a connecting plate (41), which is an arc-shaped structure with the same curvature as the segment body (1); the two ends of the segment body (1) are respectively provided with a segment connecting male groove (11) and a segment connecting female groove (12); the connecting plate (41) is housed in the segment connecting male groove (11); a strip-shaped groove (13) is provided on the inner side of the segment body (1), which is opened along the length direction of the connecting plate (41); the strip-shaped groove (13) communicates with the inner cavity of the segment connecting male groove (11); a connecting limiting assembly (42) is also provided in the segment body (1). The inner side of the segment body (1) is provided with a hand hole (14); the connecting plate (41) is provided with a segment limiting hole (411), a segment driving groove (412) and a segment limiting groove (413). The connecting limiting assembly (42) includes a hollow cylindrical limiter (421) and a limiting screw (422). The limiting screw (422) passes through the hollow cylindrical limiter (421) and fixes the hollow cylindrical limiter (421) to the bottom of the hand hole (14). A return spring (423) is connected between the hollow cylindrical limiter (421) and the bottom of the hand hole (14). After the end of the connecting plate (41) is embedded in the segment connecting groove (12) of the adjacent segment body (1), a screw sleeve is passed through the hand hole (14) and the segment limiting hole (411), and the limiting screw (422) is unscrewed. At this time, under the elastic force of the return spring (423), the hollow cylindrical limiter (421) is pushed into the segment limiting groove (413) to limit the connecting plate (41). The connector assembly (3) includes an outer connector (31) and an inner connector (32), which are respectively connected to the two ends of the heat exchange tube (2); two adjacent heat exchange tubes (2) are connected through the outer connector (31) and the inner connector (32); two heat exchange tube connection grooves (15) are respectively opened at both ends of the tube body (1), and the outer connector (31) and the inner connector (32) are respectively located in the two heat exchange tube connection grooves (15); The external connector (31) includes a flared connector (311), one end of which is connected to the heat exchange tube (2), and the other end of which is connected to three ring-shaped fixing plates (312). The three fixing plates (312) are respectively inserted into the three through holes of the hollow sealing ring (313). The flared connector (311) is connected to three locking clips (315) by three rotating shafts (314). The rotating shafts (314) are located in the middle of the locking clips (315). A locking spring (317) is provided between the end of the locking clip (315) near the heat exchange tube (2) and the flared connector (311). The end of the locking clip (315) near the fixing plate (312) abuts against the outer surface of the hollow sealing ring (313), and the abutment position is located in the middle of the two fixing plates (312). One end of the inner connector (32) is connected to the heat exchange tube (2); the other end of the inner connector (32) is located in the middle of the hollow sealing ring (313); the locking clamp (315) presses the hollow sealing ring (313) into the connecting groove (322) on the surface of the inner connector (32); a rubber gasket (316) is filled between the inner connector (32) and the flared connector (311).

2. The energy tunnel segment according to claim 1, characterized in that: The outer connector (31) and the inner connector (32) are provided with anti-slip grooves (33) on the outer surface of one end of the heat exchange tube (2) for connecting.

3. A construction method for energy tunnel segments according to any one of claims 1 to 2, characterized in that, Includes the following steps: S1: Preparation of the tube segment body (1); S2: Install the tunnel segment body (1) inside the tunnel; S3: Cast an insulation layer (5) inside the segment body (1).

4. The construction method for energy tunnel segments according to claim 3, characterized in that, S1 includes: S101: Place the steel cage (6) and fix the heat exchange tube (2) on the steel cage (6); S102: Connect the external connector (31) and the internal connector (32) to both ends of the heat exchange tube (2). S103: Cast out the tunnel segment body (1); S104: After the segment body (1) has been cured and formed, use the limit screw (422) to fix the hollow cylindrical limiter (421) at the bottom of the hand hole (14). After fixing, insert the connecting plate (41) into the segment connection slot (11).

5. The construction method for energy tunnel segments according to claim 4, characterized in that, S2 includes: S201: Install the tunnel segments (1) one by one inside the tunnel; when connecting adjacent tunnel segments (1), insert the drive unit through the strip groove (13) into the segment drive groove (412), and push the connecting plate (41) along the strip groove (13) so that the connecting plate (41) is embedded in the segment connection mother groove (12) of the adjacent tunnel segment (1); S202: Use a screw sleeve to pass through the hand hole (14) and the segment limiting hole (411) to unscrew the limiting screw (422). The hollow cylindrical limiter (421) is embedded in the segment limiting groove (413) under the elastic force of the return spring (423) to limit the connection plate (41). S203: Connect two adjacent heat exchange tubes (2) in the heat exchange tube connection groove (15) through the external connector (31) and the internal connector (32).

6. The construction method for energy tunnel segments according to claim 5, characterized in that, S3 includes: S301: After the installation of each ring segment body (1) is completed, the insulation template (8) is fixed inside the tunnel section of the ring segment body (1) using hollow grouting bolts (7); S302: Adjust the hollow grouting bolts (7) to maintain a grouting gap of 3~5cm between the thermal insulation template (8) and the inner wall of the segment body (1); S303: Inject foamed insulation material into the grouting gap through hollow grouting bolts (7); wait for the foamed insulation material to expand and fill the grouting gap and the heat exchange tube connection groove (15) and harden to form an insulation layer (5). S304: Remove the insulation template (8) and reuse it.

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