Energy tunnel segment and construction method thereof

Abstract

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

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and in particular to an energy tunnel segment and a construction method thereof. Background Art

[0002] The use of shield tunneling machines for tunnel excavation and segment laying has obvious advantages over mining methods in terms of construction efficiency and safety. Shield segments are important prefabricated parts in shield tunnel construction. By pre-embedding heat exchange pipes in shield segments, the function of extracting shallow geothermal energy can be realized, that is, "energy tunnels", which can be used for cooling high geothermal tunnels and deicing and melting snow at tunnel entrances.

[0003] At present, in the prior art, various different forms of energy tunnel shield segments have been proposed for the construction of energy tunnel shield segments and the connection of prefabricated heat exchange tubes. As follows: Document 1: The Chinese invention patent applied by Wu Yuanhao, Liu Yifei, etc. discloses a method for constructing heat exchange tubes for energy shield tunnel segments (patent number: CN202410013180.0; application announcement date May 10, 2024). It proposes to lay out heat exchange tubes with the assistance of a pipe feeder, but lacks an introduction to the connection method between tube segments. Document 2: The Chinese invention patent applied by Ji Yongming, Hu Songtao, etc. discloses a method for prefabrication and connection of tunnel energy segments for shield construction (patent number: CN201911228441.6; application announcement date March 24, 2020). It innovates the layout of heat exchange tubes. By connecting multiple capillaries in parallel to the main tube, the risk resistance of the heat exchange tube can be improved, but parallel connection will increase the total flow rate and reduce the heat exchange efficiency per unit area. Document 3: The Chinese invention patent applied by Wu Yuanhao, Han Lei, etc. discloses an energy segment (patent number: CN202311068024.6; application announcement date October 20, 2023), which proposes to bond the heat exchange tube to the outside of the segment. Although it can improve the heat exchange efficiency, the risk of damage to the heat exchange tube is greatly increased due to the lack of pipeline protection measures. Document 4: The Chinese invention patent applied by Ma Chunjing, Li Jun, Lin Yu, etc. discloses an assembled energy segment assembly and its connection method (patent number: CN202410126470.6; application announcement date April 5, 2024), which proposes an overall connection method for energy tunnel segments, and the specific connection between each segment is unknown. Document 5: The Chinese invention patent applied for by Chu Zhaoxiang, Lu Feifan, Li Xiaozhao, etc. discloses an energy tunnel segment with an auxiliary connection structure and a quick splicing method (patent number: CN 202310526096.4; application announcement date July 18, 2023); and Document 6: The Chinese invention patent applied for by Chu Zhaoxiang, Wang Yiming, Li Xiaozhao, etc. discloses an energy tunnel segment with a limiting structure and a method of use thereof (patent number: CN202310792478.1; application announcement date September 5, 2023) both propose energy tunnel segments with limiting structures, which can improve the connection quality of the segments, but the construction is difficult due to the complex structure. Document 7: The Chinese invention patent applied for by Gao Penghui, Cao An, Zhang Donghai, etc. discloses a subway tunnel segment geothermal extraction pipeline connector (patent number: CN202311414876.6; application announcement date January 2, 2024). It proposes an energy segment heat exchanger pipe connector with a pressure relief and water discharge port, but the structure is complex and difficult to construct in a limited space.

[0004] Therefore, a reasonable and simple segment connection method and heat exchange tube connection method are related to the construction quality and installation efficiency of the energy tunnel. Therefore, it is particularly important to develop an energy tunnel segment for subway stations in view of the complex and unreasonable structural form and connection and installation method of the current energy tunnel segment. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an energy tunnel segment and a construction method thereof, which solves the problems of complex structure and complicated connection of tunnel segments in the prior art.

[0006] In the first aspect, in order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0007] An energy tunnel segment comprises a segment body, wherein a connecting plate assembly is arranged inside the segment body, and adjacent segment bodies are connected via the connecting plate assembly; heat exchange tubes are laid inside the segment body, and connector assemblies are arranged at the ends of the heat exchange tubes; the connector assemblies are connected to the heat exchange tubes in adjacent segment bodies; and an insulation layer is connected to the inner side of the segment body.

[0008] In this solution, a connecting plate assembly is provided inside the tube segment body, which can connect adjacent tube segment bodies and is convenient for connection; the heat exchange tube inside the tube segment body can extract geothermal energy, and the insulation layer is used to insulate the tube segment body to prevent heat loss inside the heat exchange tube.

[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 connection male groove and a segment connection female groove are respectively provided at both ends of the segment body; the connecting plate is accommodated in the segment connection male groove; a strip slide groove is provided on the inner side of the segment body, and the strip slide groove is provided along the length direction of the connecting plate; the strip slide groove is communicated with the inner cavity of the segment connection male groove; a connection limit assembly is also provided in the segment body.

[0010] In this solution, when adjacent segment bodies are connected, driving parts such as steel pipes are inserted into the strip slide grooves, and the connecting plates are pushed to slide along the strip slide grooves until the ends of the connecting plates are embedded in the segment connection mother grooves of the adjacent segment bodies. The two segment bodies can then 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 connection limit assembly comprises a hollow cylindrical limiter and a limit screw, wherein the limit screw penetrates the hollow cylindrical limiter and fixes the hollow cylindrical limiter at the bottom of the hand hole; a reset spring is connected between the hollow cylindrical limiter and the bottom of the hand hole.

[0013] In this solution, after the end of the connecting plate is embedded in the pipe segment connection female groove of the adjacent pipe segment body, a screw sleeve is used to pass through the hand hole and the pipe segment limit hole, and the limit screw is screwed out. At this time, under the elastic force of the reset spring, the hollow cylindrical limiter is pushed into the pipe segment limit groove to limit the connected pipe segment, thereby preventing the connected pipe segment from moving inside the pipe segment connection male groove and the pipe segment connection female groove of the adjacent pipe segment body, thereby ensuring the reliability of the pipe segment connection.

[0014] Furthermore, the connector assembly includes an outer connector and an inner connector, and the outer connector and the inner connector 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 respectively provided at both ends of the tube sheet body, and the outer joint and the inner joint are respectively located in the two heat exchange tube connection grooves.

[0016] In this solution, a heat exchange tube connection groove is designed to provide an operating space for the connection of the inner joint and the outer joint, so as to avoid the inability to connect the heat exchange tubes inside the adjacent tube segment bodies after the two tube segment bodies are connected.

[0017] Further, the external joint includes a flared joint, one end of the flared joint is connected to the heat exchange tube, and the other end of the flared joint is connected to three annular array fixing plates, and the three fixing plates are respectively arranged in three through holes of the hollow sealing ring; the flared joint is respectively connected to three locking clips through three rotating shafts, and the rotating shafts are arranged in the middle of the locking clips; a locking spring is arranged between one end of the locking clip close to the heat exchange tube and the flared joint; one end of the locking clip close to the fixing plate abuts against the outer surface of the hollow sealing ring, and the abutting position is located in the middle of the two fixing plates;

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

[0019] In this solution, when connecting the heat exchange tubes in the assembled tube body, pinch one end of the locking clamp with a locking spring and insert the inner joint into the middle of the hollow sealing ring; loosen the locking clamp, and under the elastic force of the locking spring, the end of the locking clamp close to the hollow sealing ring shrinks inward, squeezing the hollow sealing ring into the connecting groove on the surface of the inner joint; the connection between the outer joint and the inner joint is achieved. This design makes it easy to connect the heat exchange tubes, and there is no need to use hot-melt connection for the pipelines at the construction site, so the construction is simple.

[0020] Furthermore, an anti-slip groove is provided on the outer surface of one end of the outer joint and the inner joint for connecting the heat exchange tube.

[0021] In a second aspect, the present invention provides a method for constructing an energy tunnel segment based on the energy tunnel segment provided in the first aspect, comprising the following steps:

[0022] S1: Prepare the segment body;

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

[0024] S3: pouring the insulation layer on the inner side of the segment body.

[0025] In this scheme, the segment body is prepared first and assembled, and finally the insulation layer is poured. This design ensures that the poured insulation layer can cover the assembled segment body and seal the assembled gaps, with good sealing and insulation effect.

[0026] Furthermore, S1 includes:

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

[0028] S102: connecting an outer joint and an inner joint at both ends of the heat exchange tube respectively;

[0029] S103: Casting the segment body;

[0030] S104: After the segment body is solidified and formed, the hollow cylindrical limiter is fixed at the bottom of the hand hole using a limit screw, and after being fixed, the connecting plate is inserted into the segment connecting groove.

[0031] In this solution, 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 fixing the heat exchange tubes inside the segment body.

[0032] Furthermore, S2 includes:

[0033] S201: installing the segment bodies piece by piece inside the tunnel; when connecting adjacent segment bodies, inserting the driving member into the segment driving groove through the strip slide groove, and pushing the connecting plate along the strip slide groove, so that the connecting plate is inserted into the segment connecting female groove of the adjacent segment bodies;

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

[0035] S203: Connecting two adjacent heat exchange tubes in the heat exchange tube connecting groove through an outer joint and an inner joint.

[0036] In this solution, the connection plate is moved between two adjacent segment bodies to connect the two, which is simple to operate; after the connection, the hollow cylindrical limiter limits the connection plate, and the connection is reliable.

[0037] Furthermore, S3 includes:

[0038] S301: After each ring segment body is installed, the insulation template is fixed to the inner side of the tunnel section of the ring segment body by using hollow grouting bolts;

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

[0040] S303: injecting foam insulation material into the grouting gap through the hollow grouting bolt; waiting for the foam insulation material to expand and fill the grouting gap and the heat exchange tube connection groove and harden to form an insulation layer;

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

[0042] The beneficial effects of the present invention are:

[0043] In the energy tunnel segment provided by the present invention, a connecting plate is designed to connect two adjacent segment bodies; when connecting, the connecting plate is pushed along the strip slide groove until the end of the connecting plate is embedded in the segment connection mother groove of the adjacent segment body, so that the two segment bodies can be connected. This connection method is simple to operate and has high connection strength after connection; after connection, a screw sleeve is used to pass through the hand hole and the segment limit hole, and the limit screw is screwed out. At this time, the hollow cylindrical limiter is pushed into the segment limit groove under the elastic force of the reset spring, and the connected segment is limited, thereby ensuring the reliability of the segment connection.

[0044] Connect the inner joint and the outer joint at the end of the heat exchange tube. When connecting the heat exchange tube, insert the inner joint into the middle of the hollow sealing ring; loosen the locking clamp, and under the elastic force of the locking spring, the end of the locking clamp close to the hollow sealing ring shrinks inward, squeezing the hollow sealing ring into the connecting groove on the surface of the inner joint; the connection between the outer joint and the inner joint is achieved. This design makes it easy to connect the heat exchange tube, and there is no need to use hot-melt connection for the pipeline at the construction site, which solves the problem of connecting heat exchange tubes in limited space. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0046] Figure 2 It is a structural schematic diagram of the tube segment body of the present invention;

[0047] Figure 3 It is a schematic diagram of the cross-sectional structure of the tube segment body of the present invention;

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

[0049] Figure 5 It is a structural schematic diagram of the connection limit assembly of the present invention;

[0050] Figure 6 It is a structural schematic diagram of the connection limit assembly of the present invention;

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

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

[0053] Fig. 9 It is a schematic diagram of the cross-sectional structure of the external connector of the present invention;

[0054] Fig.10 It is a schematic diagram of the structure of the locking clip of the present invention;

[0055] Fig.11 It is a structural schematic diagram of the inner joint of the present invention;

[0056] Fig.12 It is a schematic diagram of the structure of pouring the insulation layer on the inner side of the pipe segment body according to the present invention.

[0057] Reference numerals:

[0058] 1. Segment body; 11. Segment connection male groove; 12. Segment connection female groove; 13. Strip slide groove; 14. Hand hole; 15. Heat exchange tube connection groove; 2. Heat exchange tube; 3. Connector assembly; 31. External joint; 311. Flared joint; 312. Fixed plate; 313. Hollow sealing ring; 314. Rotating shaft; 315. Locking clip; 316. Rubber gasket; 317. Locking spring; 32. Internal joint; 322. Connection groove; 33. Anti-slip groove; 4. Connecting plate assembly; 41. Connecting plate; 411. Segment limit hole; 412. Segment drive groove; 413. Segment limit groove; 42. Connection limit assembly; 421. Hollow cylindrical limiter; 422. Limit screw; 423. Reset spring; 5. Insulation layer; 6. Steel cage; 7. Hollow grouting bolt; 8. Insulation template; DETAILED DESCRIPTION

[0059] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The specific implementation of the present invention is described below to facilitate the understanding of the present invention by those skilled in the art, but it should be clear that the present invention is not limited to the scope of the specific implementation. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using 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, which is easy to assemble and connect, and can solve the problems of complex structure and complicated connection of tunnel segments in the prior art; it specifically includes: a segment body 1, a connecting plate assembly 4, a heat exchange tube 2 and a connecting head assembly 3;

[0062] Among them, a connecting plate assembly 4 is arranged inside the tube segment body 1, and adjacent tube segment bodies 1 are connected through the connecting plate assembly 4; heat exchange tubes 2 are laid inside the tube segment body 1, and a connecting head assembly 3 is arranged at the end of the heat exchange tube 2; the connecting head assembly 3 is connected to the heat exchange tube 2 in the adjacent tube segment body 1; and an insulation layer 5 is connected to the inner side of the tube segment body 1.

[0063] like Figure 3 As shown, the connecting plate assembly 4 includes a connecting plate 41 and a connecting stop assembly 42. The connecting plate 41 is an arc structure with the same arc as the segment body 1. The segment body 1 is provided with a segment connecting male groove 11 and a segment connecting female groove 12 at both ends. The connecting plate 41 is accommodated in the segment connecting male groove 11. The segment body 1 is provided with a strip chute 13, which is provided along the length direction of the connecting plate 41. The strip chute 13 is communicated with the inner cavity of the segment connecting male groove 11. The segment body 1 is also provided with a connecting stop assembly 42. When connecting adjacent segment bodies 1, a driving member such as a steel pipe is inserted into the strip chute 13, and the connecting plate 41 is pushed to slide along the strip chute 13 until the end of the connecting plate 41 is embedded in the segment connecting female groove 12 of the adjacent segment body 1, so that the two segment bodies 1 can be connected. This connection method is simple to operate and has 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; Figure 5 and Figure 6 As shown, the connection limit assembly 42 includes a hollow cylindrical limiter 421 and a limit screw 422. The limit screw 422 penetrates the hollow cylindrical limiter 421 and fixes the hollow cylindrical limiter 421 at the bottom of the hand hole 14; a reset 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 tube segment connection female groove 12 of the adjacent tube segment body 1, a screw sleeve is used to pass through the hand hole 14 and the tube segment limit hole 411, and the limit screw 422 is screwed out. At this time, the hollow cylindrical limiter 421 is pushed into the tube segment limit groove 413 under the elastic force of the reset spring 423, and the connecting tube segment is limited, so as to prevent the connecting tube segment from moving inside the tube segment connection male groove 11 and the tube segment connection female groove 12 of the adjacent tube segment body 1; and the reliability of the tube segment connection is ensured.

[0065] The connecting plate 41 is an iron prefabricated part in the shape of an arc tile, with a length of 40 to 50 cm, a thickness of 4 to 5 cm, and a width of 10 to 15 cm. The material used is preferably hot-rolled steel, and high-carbon cold-rolled steel cannot be used.

[0066] like Figure 4 As shown, a 4-6 mm thick shock-absorbing rubber is provided between the connecting plate 41 and the segment connecting male groove 11 and the segment connecting female groove 12 to prevent damage to the tunnel segment connecting structure caused by long-term vehicle vibration.

[0067] like Figure 7 As shown, the connector assembly 3 includes an outer connector 31 and an inner connector 32, and the outer connector 31 and the inner connector 32 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 provided at the two ends of the tube segment 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 an 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 in the adjacent tube segment bodies 1 after the two tube segment bodies 1 are connected.

[0068] The outer joint 31 and the inner joint 32 are used to connect one end of the heat exchange tube 2, and an anti-skid groove 33 is provided on the outer surface. When the tube body 1 is prepared, a hot melt machine can be used to hot melt the heat exchange tube 2, and after hot melting, it can be directly put on the anti-skid groove 33 of the outer joint 31 and the inner joint 32.

[0069] like Figure 8 and Fig. 9 As shown, the external joint 31 includes a flared joint 311, one end of the flared joint 311 is connected to the heat exchange tube 2, and the other end of the flared joint 311 is connected to three annular array fixing plates 312, and the three fixing plates 312 are respectively arranged in three through holes of the hollow sealing ring 313; the flared joint 311 is respectively connected to three locking clips 315 through three rotating shafts 314, and the rotating shaft 314 is arranged in the middle of the locking clip 315, and the locking clip 315 is a saddle shape with a wide front and a narrow rear, as shown in FIG. Fig.10 A locking spring 317 is provided between the end of the locking clip 315 close to the heat exchange tube 2 and the flared joint 311; the end of the locking clip 315 close to the fixing sheet 312 abuts against the outer surface of the hollow sealing ring 313, and the abutting position is located between the two fixing sheets 312; the hollow sealing ring 313 is made of rubber.

[0070] like Fig.11As shown, one end of the inner joint 32 is connected to the heat exchange tube 2; the other end of the inner joint 32 is set in the middle of the hollow sealing ring 313; the locking clamp 315 squeezes the hollow sealing ring 313 into the connection groove 322 on the surface of the inner joint 32; and a rubber gasket 316 is filled between the inner joint 32 and the flared joint 311. When connecting the heat exchange tube 2, pinch one end of the locking clamp 315 with the locking spring 317, and insert the inner joint 32 into the middle of the hollow sealing ring 313; loosen the locking clamp 315, and under the elastic force of the locking spring 317, the end of the locking clamp 315 close to the hollow sealing ring 313 shrinks inward, squeezing the hollow sealing ring 313 into the connection groove 322 on the surface of the inner joint 32; the connection between the outer joint 31 and the inner joint 32 is realized, and the design of the heat exchange tube 2 is convenient to connect, and there is no need to use hot melt connection for the pipeline at the construction site, and the construction is simple.

[0071] As a preference of this 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 Figure 1-Figure 12 As shown, this embodiment provides a construction method for an energy tunnel segment based on the energy tunnel segment provided in Example 1, comprising the following steps:

[0074] S1: preparing the segment body 1; specifically comprising:

[0075] S101: placing the steel cage 6 and fixing 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 with the tube segment connection male groove 11 and the tube segment connection female groove 12 to avoid position interference resulting in the heat exchange tube 2 being exposed in the groove body after casting;

[0076] S102: Connect the outer joint 31 and the inner joint 32 at 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 directly put it on the outer joint 31 or the inner joint 32 after heating;

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

[0078] S104: After the segment body 1 is solidified, the hollow cylindrical stopper 421 is fixed to the bottom of the hand hole 14 using the limit screw 422, and after being fixed, the connecting plate 41 is inserted into the segment connecting groove 11.

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

[0080] S201: Install the segment bodies 1 one by one inside the tunnel. During installation, attention should be paid to the direction of adjacent segment bodies 1 in each ring. The segment connection male grooves 11 and segment connection female grooves 12 of adjacent segment bodies at the same construction joint should correspond to each other. When connecting adjacent segment bodies 1, the driving member is inserted into the segment driving groove 412 through the strip slide groove 13, and the connecting plate 41 is pushed along the strip slide groove 13 so that the connecting plate 41 is embedded in the segment connection female grooves 12 of the adjacent segment bodies 1. The driving member 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, screw out the limiting screw 422, and 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 : connecting two adjacent heat exchange tubes 2 in the heat exchange tube connecting groove 15 via an outer joint 31 and an inner joint 32 .

[0083] S3: pouring the insulation layer 5 on the inner side of the segment body 1, such as Fig.12 As shown; specifically including:

[0084] S301: After each ring segment body 1 is installed, the insulation template 8 is fixed to the inner side of the tunnel section of the ring segment body 1 by using the hollow grouting bolts 7;

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

[0086] S303: Inject foam insulation material into the grouting gap through the hollow grouting bolt 7; wait for the foam insulation material to expand and fill the grouting gap and the heat exchange tube connecting groove 15 and harden to form an insulation layer 5; the foam insulation material is preferably a B1 grade fireproof foam insulation material.

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

[0088] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the invention.

Claims

1. An energy tunnel segment, characterized in that: It comprises a tube segment body (1), wherein a connecting plate assembly (4) is arranged inside the tube segment body (1), and adjacent tube segment bodies (1) are connected via the connecting plate assembly (4); A heat exchange tube (2) is laid inside the tube segment body (1), and a connector assembly (3) is provided at the end of the heat exchange tube (2); the connector assembly (3) is connected to the heat exchange tube (2) in the adjacent tube segment body (1); A thermal insulation layer (5) is connected to the inner side of the tube segment body (1).

2. The energy tunnel segment according to claim 1, characterized in that: The connecting plate assembly (4) comprises a connecting plate (41), and the connecting plate (41) is an arc-shaped structure having the same arc as the segment body (1); a segment connection male groove (11) and a segment connection female groove (12) are respectively formed at two ends of the segment body (1); the connecting plate (41) is accommodated in the segment connection male groove (11); A strip-shaped slide groove (13) is provided on the inner side of the segment body (1), and the strip-shaped slide groove (13) is provided along the length direction of the connecting plate (41); the strip-shaped slide groove (13) is communicated with the inner cavity of the segment connecting groove (11); A connection limiting component (42) is also provided in the segment body (1).

3. The energy tunnel segment according to claim 2, characterized in that: 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); The connection limit assembly (42) comprises a hollow cylindrical limiter (421) and a limit screw (422); the limit 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).

4. The energy tunnel segment according to claim 1, characterized in that: The connector assembly (3) comprises an outer connector (31) and an inner connector (32), wherein the outer connector (31) and the inner connector (32) are respectively connected to two ends of the heat exchange tube (2); two adjacent heat exchange tubes (2) are connected via the outer connector (31) and the inner connector (32); Two heat exchange tube connection grooves (15) are respectively provided at both ends of the tube sheet body (1), and the outer joint (31) and the inner joint (32) are respectively located in the two heat exchange tube connection grooves (15).

5. The energy tunnel segment according to claim 4 is characterized in that: The external joint (31) comprises a flared joint (311), one end of which is connected to the heat exchange tube (2), and the other end of which is connected to three fixing plates (312) in an annular array, the three fixing plates (312) being respectively inserted into three through holes of a hollow sealing ring (313); three locking clips (315) are respectively connected to the flared joint (311) via three rotating shafts (314), the rotating shafts (314) being arranged in the middle of the locking clips (315); a locking spring (317) is arranged between one end of the locking clip (315) close to the heat exchange tube (2) and the flared joint (311); one end of the locking clip (315) close to 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 two fixing plates (312); One end of the inner joint (32) is connected to the heat exchange tube (2); the other end of the inner joint (32) is arranged in the middle of the hollow sealing ring (313); the locking clamp (315) squeezes the hollow sealing ring (313) into the connecting groove (322) on the surface of the inner joint (32); and a rubber gasket (316) is filled between the inner joint (32) and the flared joint (311).

6. The energy tunnel segment according to claim 5, characterized in that: The outer surface of one end of the outer joint (31) and the inner joint (32) used for connecting the heat exchange tube (2) is provided with an anti-slip groove (33).

7. A method for constructing an energy tunnel segment according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: preparing a segment body (1); S2: installing the segment body (1) inside the tunnel; S3: pouring a thermal insulation layer (5) on the inner side of the segment body (1).

8. The method for constructing energy tunnel segments according to claim 7, characterized in that: The S1 includes: S101: placing a steel cage (6) and fixing a heat exchange tube (2) on the steel cage (6); S102: connecting an outer joint (31) and an inner joint (32) at two ends of the heat exchange tube (2) respectively; S103: Casting the segment body (1); S104: After the segment body (1) is solidified, the hollow cylindrical stopper (421) is fixed to the bottom of the hand hole (14) using the stop screw (422), and after being fixed, the connecting plate (41) is inserted into the segment connecting groove (11).

9. The method for constructing energy tunnel segments according to claim 8, characterized in that: The S2 includes: S201: The segment bodies (1) are installed piece by piece inside the tunnel; when connecting adjacent segment bodies (1), the driving member is inserted into the segment driving groove (412) through the strip slide groove (13), and the connecting plate (41) is pushed along the strip slide groove (13) so that the connecting plate (41) is inserted into the segment connecting female groove (12) of the adjacent segment body (1); S202: Use a screw sleeve to pass through the hand hole (14) and the segment limiting hole (411), screw out the limiting screw (422), and the hollow cylindrical limiter (421) is embedded in the segment limiting groove (413) under the elastic force of the return spring (423), so as to limit the connection plate (41); S203: connecting two adjacent heat exchange tubes (2) in the heat exchange tube connection groove (15) via an external joint (31) and an internal joint (32).

10. The construction method of energy tunnel segments according to claim 9, characterized in that: The S3 includes: S301: After each ring segment body (1) is installed, the insulation template (8) is fixed to the inner side of the tunnel section of the ring segment body (1) using a hollow grouting bolt (7); S302: adjusting the hollow grouting bolt (7) so that a grouting gap of 3 to 5 cm is maintained between the thermal insulation template (8) and the inner wall of the segment body (1); S303: injecting a foamed thermal insulation material into the grouting gap through a hollow grouting bolt (7); waiting for the foamed thermal insulation material to expand and fill the grouting gap and the heat exchange pipe connection groove (15) and harden to form a thermal insulation layer (5); S304: removing the thermal insulation template (8) and recycling it.

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