A high ground temperature tunnel insulation segment and its preparation method

Abstract

The present invention provides a high-temperature tunnel insulation segment and a preparation method thereof, wherein the high-temperature tunnel insulation segment comprises: a concrete layer, a steel skeleton, and a plurality of triangular inserted insulation tubes; the steel skeleton is a truss structure, and the steel skeleton comprises a plurality of main bars, a plurality of double-legged stirrups, and a plurality of angled steel bars; a plurality of the main bars are arranged at intervals along the width direction of the segment, and a plurality of the double-legged stirrups are arranged at intervals along the circumferential direction of the segment, and each of the double-legged stirrups is fixed to the outside of a plurality of the main bars; a plurality of the steel bars distributed adjacently along the circumferential direction of the segment are arranged inside each of the main bars; each of the triangular inserted insulation tubes is inserted into the interior of a plurality of the main bars and is in close contact with the steel bars and the main bars. The present invention can greatly improve the insulation performance of the segment while ensuring the basic strength and impermeability of the segment.

Description

Technical Field

[0001] The present invention belongs to the field of thermal environment control of high geothermal tunnels, and in particular relates to a high geothermal tunnel thermal insulation segment and a preparation method thereof. Background Art

[0002] As the geological conditions of tunnels become increasingly complex and the depth of burial

[0003] As tunnels deepen, high-temperature heat damage is becoming increasingly serious. High ground temperatures not only reduce the durability of tunnel concrete structures but also pose a serious threat to the health and safety of on-site construction workers, leading to reduced efficiency and increased costs, ultimately hindering the smooth progress of project construction. Therefore, it is necessary to take effective measures to prevent and control high-temperature heat damage during tunnel construction.

[0004] Mechanized tunnel excavation is an effective means of coping with harsh geological environments and reducing the number of construction workers. Tubular segments, as prefabricated lining structures, are widely used in tunnel construction, working with mechanical equipment such as shield machines and TBMs. They feature mass prefabrication and automated installation. Therefore, appropriate modification of the segments to provide thermal insulation without compromising the strength required to support the tunnel's surrounding rock is a possibility. However, there are currently few reports on improving the thermal insulation performance of segments, and while this improvement may result in reduced strength and stiffness, this is unacceptable for segments that serve a load-bearing and supportive role.

[0005] That is, how to provide a high-temperature tunnel insulation segment that can improve the insulation performance of the segment while ensuring that the lining structure has the strength requirements required for support, significantly reduce the heat exchange between the high-temperature surrounding rock and the inside of the tunnel, and effectively guarantee the basic environmental requirements for high-temperature tunnel construction is a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0006] In view of the above problems and shortcomings in the prior art, the first aspect of the present invention provides a high

[0007] The high-temperature tunnel insulation segment comprises: a concrete layer, a steel skeleton, and a plurality of triangular inserted insulation tubes; the steel skeleton is a truss structure, and the steel skeleton comprises a plurality of main bars, a plurality of double-legged stirrups and a plurality of angled steel bars; the main bars are a fan-ring structure, a plurality of the main bars are arranged at intervals along the width direction of the segment, a plurality of the double-legged stirrups are arranged at intervals along the circumferential direction of the segment, and each of the double-legged stirrups is fixed to the outside of a plurality of the main bars; a plurality of the steel bars adjacently distributed along the circumferential direction of the segment are arranged inside each of the main bars, and each of the steel bars is fixedly connected to the main bars; each of the triangular inserted insulation tubes is inserted into the interior of a plurality of the main bars and is in close contact with the steel bars and the main bars; concrete is filled in the connecting gap between the steel skeleton and the plurality of triangular inserted insulation tubes to form the concrete layer, and a concrete protective layer is provided on the outside of the concrete layer.

[0008] In the first aspect, the main reinforcement includes an outer main reinforcement with a curved structure and an inner main reinforcement with a curved structure. The two ends of the outer main reinforcement are respectively fixedly connected to the two ends of the inner main reinforcement to form the main reinforcement of the fan ring structure. The diameter of the inner main reinforcement is larger than the diameter of the outer main reinforcement.

[0009] In the first aspect, the high geothermal tunnel insulation segment also includes: a plurality of rubber protection strips; a plurality of the rubber protection strips are arranged at the contact portion between the triangular inserted insulation tube and the steel bars, and at the contact portion between the triangular inserted insulation tube and the double-legged stirrups.

[0010] In the first aspect, the triangular insertable thermal insulation cylinder is an internally hollow thermal insulation cylinder made of thermal insulation material. Each of the triangular insertable thermal insulation cylinders includes a cylinder cover and a cylinder body, and one end of the cylinder cover is detachably connected to one end of the cylinder body.

[0011] In the first aspect, the plurality of triangular insert-type thermal insulation tubes include a first thermal insulation tube, a second thermal insulation tube, and a third thermal insulation tube, and the gaps formed by the fixed connection of the plurality of steel bars adjacently distributed along the circumferential direction of the pipe segment and the corresponding one of the main bars include a first gap, a second gap, and a third gap, the shape of the end face of the first thermal insulation tube is adapted to the shape of the first gap, the shape of the end face of the second thermal insulation tube is adapted to the shape of the second gap, and the shape of the end faces of the three thermal insulation tubes is adapted to the shape of the third gap.

[0012] In the first aspect, the concrete protective layer includes an outer convex surface and an inner concave surface, and water-stop grooves are symmetrically provided on both sides of the outer convex surface and on both sides of the inner concave surface.

[0013] In the first aspect, a plurality of bolt holes are provided in the middle of the four sides of the concrete cover.

[0014] The second aspect of the present application provides a method for preparing a high-temperature tunnel insulation segment, which is used to prepare the high-temperature tunnel insulation segment mentioned above, and the method comprises the following steps: preparing a plurality of triangular plug-in insulation tubes, and the preparation of the plurality of triangular plug-in insulation tubes comprises: preparing a mold for the triangular plug-in insulation tube; casting the mold with insulation material to prepare the triangular plug-in insulation tube; adding insulation material to the inside of the cylinder body of the triangular plug-in insulation tube, installing the tube cover on the cylinder body, and sealing the triangular plug-in insulation tube; preparing a steel skeleton, and the preparation of the steel skeleton comprises: processing and bending the steel bars to make a plurality of steel bars with angles, and inspecting them; placing a plurality of main bars along the width direction of the segment, and marking the steel bar installation positions on the plurality of main bars ; Glue several rubber protection strips to the contact parts of the triangular inserted thermal insulation tube and the steel bars and double-legged stirrups; Install and weld them layer by layer in the order of double-legged stirrups - steel bars - inserted triangular inserted thermal insulation tube - double-legged stirrups; Check to determine whether it meets the requirements; Pour concrete, the concrete pouring includes: prepare the pipe segment mold; clean the pipe segment mold, check and oil it; put the steel skeleton into the pipe segment mold and close the mold; insert and fix the grouting pipe into the pipe segment mold for pouring, and at the same time perform integral mechanical vibration on the mold to compact the concrete; Forming and curing, the forming and curing include: top surface treatment of the pipe segment; demoulding and cleaning the mold; curing the pipe segment; testing the anti-permeability, strength and thermal insulation performance of the pipe segment.

[0015] In the second aspect, the preparation of the segment mold includes: setting the circumferential section of one side of the segment mold to transparent tempered glass, and setting grouting holes at the upper and lower parts of the segment mold.

[0016] In the second aspect, the curing of the pipe segments includes: covering the surface of the pipe segments with plastic film and performing static curing for 24 hours; performing pool curing for 7-14 days; performing spray curing for 0-7 days; and performing natural curing until the age of 28 days.

[0017] Beneficial effects: The high geothermal tunnel insulation segment provided by the present invention has a steel frame of a truss structure including a plurality of main bars, a plurality of double-leg stirrups and a plurality of angled steel bars. The stability of the truss structure greatly improves the strength, compressive and shear resistance and stability of the segment, thereby completing the strength compensation of the segment; by using a plurality of triangular inserted insulation tubes, the thermal insulation performance of the segment is enhanced, and the internal space of the steel frame is fully utilized, thereby reducing the amount of concrete used, greatly reducing the density of the segment, improving the safety and stability of the segment structure, and making its construction and transportation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the internal annular structure of the high geothermal tunnel insulation segment provided by the present invention.

[0020] Figure 2 It is a front view of the high geothermal tunnel insulation segment provided by the present invention.

[0021] Figure 3 It is a side view of the high geothermal tunnel insulation segment provided by the present invention.

[0022] Figure 4 This is an internal top view of the high geothermal tunnel insulation segment provided by the present invention.

[0023] Figure 5 It is a side cross-sectional view of the high geothermal tunnel insulation segment provided by the present invention.

[0024] Figure 6 This is a structural diagram of the main reinforcement of the high ground temperature tunnel insulation segment provided by the present invention.

[0025] Figure 7 It is a side view of the triangular inserted insulation tube of the high geothermal tunnel insulation pipe segment provided by the present invention.

[0026] Figure 8 It is a front view of an angled steel bar provided by the present invention.

[0027] Description of reference numerals:

[0028] 1. Concrete layer; 11. Concrete cover

[0029] 2. Steel skeleton; 21. Main reinforcement; 211. Outer main reinforcement; 212. Inner main reinforcement; 22. Double stirrups; 23. Steel bars

[0030] 3. Triangular insertable heat-insulating cylinder; 31. Cylinder cover; 32. Cylinder body; 33. First heat-insulating cylinder; 34. Second heat-insulating cylinder; 35. Third heat-insulating cylinder;

[0031] 4. Rubber protection strip;

[0032] 5. Stop water;

[0033] 6. Bolt hole. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0035] Throughout this specification, unless otherwise specified, the terms used herein should be understood as having the same meaning as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention belongs. In the event of any conflict, the present specification shall prevail.

[0036] Example 1:

[0037] like Figure 1-2 As shown, the present embodiment 1 provides a high geothermal tunnel insulation segment, which includes: a concrete layer 1, a steel skeleton 2, and a plurality of triangular inserted insulation tubes 3; the steel skeleton 2 is a truss structure, and the steel skeleton 2 includes a plurality of main bars 21, a plurality of double-legged stirrups 22 and a plurality of angled steel bars 23 (such as right-angled steel bars); the main bars 21 are fan-ring structures, and a plurality of the main bars 21 are arranged at intervals along the width direction of the segment, and a plurality of the double-legged stirrups 22 are arranged at intervals along the circumferential direction of the segment, and each of the double-legged stirrups 22 is welded by welding. The main reinforcement 21 is fixed to the outside of the main reinforcement 21; the inside of each main reinforcement 21 is provided with a plurality of steel bars 23 distributed adjacently along the circumferential direction of the pipe segment, and each steel bar 23 is fixedly connected to the main reinforcement 21 by welding; each triangular inserted thermal insulation tube 3 is inserted into the inside of the main reinforcement 21 and is in close contact with the steel bar 23 and the main reinforcement 21; concrete is filled in the connecting gap between the steel skeleton 2 and the plurality of triangular inserted thermal insulation tubes 3 to form the concrete layer 1, and a concrete protective layer 11 is provided on the outside of the concrete layer 1.

[0038] The high-temperature tunnel insulation segment provided by the present invention significantly improves the segment's thermal insulation performance while ensuring the segment's basic strength and impermeability. The steel skeleton 2, comprising a truss structure consisting of several main bars 21, several double-legged stirrups 22, and several angled steel bars 23, significantly improves the segment's strength, compressive and shear resistance, and stability through the stability of the truss structure, completing the segment's strength compensation. The use of several triangular insert-type insulation tubes 3 enhances the segment's thermal insulation performance, fully utilizes the internal space of the steel skeleton 2, reduces concrete usage, significantly reduces the segment's density, improves the segment's structural safety and stability, and facilitates its construction and transportation.

[0039] In some possible embodiments, the main rib 21 includes an outer main rib 211 with a curved structure and an inner main rib 212 with a curved structure. The two ends of the outer main rib 211 are respectively fixedly connected to the two ends of the inner main rib 212 to form the main rib 21 with a fan-ring structure. The diameter of the inner main rib 212 is larger than the diameter of the outer main rib 211.

[0040] Those skilled in the art can understand that the main reinforcement 21 includes an outer main reinforcement 211 with a curved structure and an inner main reinforcement 212 with a curved structure. The two ends of the outer main reinforcement 211 are respectively welded to the two ends of the inner main reinforcement 212 to form the main reinforcement 21 with a fan-ring structure. The diameter of the inner main reinforcement 212 is larger than the diameter of the outer main reinforcement 211, which can make the turning node of the main reinforcement 21 stronger and the structure of the main reinforcement 21 more stable. In addition, the diameter of the inner main reinforcement 212 is larger than the diameter of the outer main reinforcement 211, which can make the inner main reinforcement 212 better welded to the outer main reinforcement 211.

[0041] In some possible embodiments, the high geothermal tunnel insulation segment also includes: a plurality of rubber protective strips 4; a plurality of the rubber protective strips 4 are arranged at the contact portion between the triangular inserted insulation tube 3 and the steel bars 23, and at the contact portion between the triangular inserted insulation tube 3 and the double-legged stirrups 22.

[0042] This is because a plurality of rubber protection strips 4 are arranged at the contact portion between the triangular inserted thermal insulation tube 3 and the steel bars 23, as well as at the contact portion between the triangular inserted thermal insulation tube 3 and the double-legged stirrups 22, thereby avoiding friction loss between the triangular inserted thermal insulation tube 3 and the steel skeleton 2, protecting the triangular inserted thermal insulation tube 3, and improving the durability of the pipe segment insulation.

[0043] In some possible embodiments, the triangular insertable insulation tube 3 is an internally hollow insulation tube made of insulation material. Each of the triangular insertable insulation tubes 3 includes a tube cover 31 and a tube body 32. One end of the tube cover 31 is detachably connected to one end of the tube body 32.

[0044] This is because air has a lower thermal conductivity than building materials such as steel bars and concrete, and is a natural and inexpensive thermal insulation carrier. The triangular inserted thermal insulation tube 3 is an internal hollow thermal insulation tube made of thermal insulation material, which can effectively improve the thermal insulation performance of the pipe segment. In addition, the internal hollowness of the triangular inserted thermal insulation tube 3 can also be used to prevent other thermal insulation materials from being added to enhance the thermal insulation performance of the pipe segment. Each of the triangular inserted thermal insulation tubes 3 includes a tube cover 31 and a tube body 32. One end of the tube cover 31 is detachably connected to one end of the tube body 32. The detachable connection is a spiral connection or a snap connection. This makes it easy to install the tube cover 31 on the tube body 32 after adding the required thermal insulation material to the inside of the thermal insulation tube during the preparation of the triangular inserted thermal insulation tube 3 to seal the thermal insulation tube.

[0045] In some possible embodiments, several of the triangular inserted insulating tubes 3 include a first insulating tube 33, a second insulating tube 34 and a third insulating tube 35, and the gaps formed by the fixed connection of several of the steel bars 23 adjacently distributed along the circumferential direction of the pipe segment and a corresponding main reinforcement 21 include a first gap, a second gap and a third gap. The shape of the end face of the first insulating tube 33 is adapted to the shape of the first gap, the shape of the end face of the second insulating tube 34 is adapted to the shape of the second gap, and the shape of the end face of the three insulating tubes 35 is adapted to the shape of the third gap.

[0046] This is because the plurality of triangular insert-type heat-insulating tubes 3 are divided into a first heat-insulating tube 33, a second heat-insulating tube 34 and a third heat-insulating tube 35. For example, the end face of the first heat-insulating tube 33 is a right triangle, which is half the size of the third heat-insulating tube 35 (the vertex is cut perpendicularly to the opposite side); the end face of the second heat-insulating tube 34 is an isosceles right triangle; the end face of the third heat-insulating tube 35 is an isosceles triangle with a vertex angle of 80°-83°; a plurality of adjacently distributed steel bars 23 along the circumferential direction of the tube segment are fixedly connected to a corresponding main reinforcement 21. The gaps formed by the connection include a first gap, a second gap and a third gap. The shape of the end face of the first insulation tube 33 is adapted to the shape of the first gap, the shape of the end face of the second insulation tube 34 is adapted to the shape of the second gap, and the shape of the end face of the third insulation tube 35 is adapted to the shape of the third gap. The triangular inserted insulation tube 3 can be filled with the gap formed by the steel bars 23 and the main bars 21, making full use of the internal space of the steel skeleton 2, reducing the amount of concrete used, and improving the thermal insulation performance of the pipe segment.

[0047] In some possible implementations, the concrete protective layer 11 includes an outer convex surface and an inner concave surface, and water stop grooves 5 are symmetrically provided on both sides of the outer convex surface and on both sides of the inner concave surface.

[0048] Those skilled in the art will understand that by including an outer convex surface and an inner concave surface in the concrete protective layer 11, and symmetrically providing water stop grooves 5 on both sides of the outer convex surface and both sides of the inner concave surface, water overflow on the pipe segment can be prevented.

[0049] In some possible implementations, a plurality of bolt holes 6 are provided in the middle of the four sides of the concrete protective layer 11 .

[0050] Those skilled in the art will understand that by providing a plurality of bolt holes 6 in the middle of the four sides of the concrete protective layer 11, the insulation segments can be combined together to form a pipeline, and the problem of displacement when the insulation segments are connected to each other can be prevented.

[0051] Example 2:

[0052] Embodiment 2 of the present application provides a method for preparing a high-temperature tunnel insulation segment, which is used to prepare the high-temperature tunnel insulation segment mentioned above, and the method comprises the following steps: preparing a plurality of triangular plug-in insulation tubes 3, and the preparation of the plurality of triangular plug-in insulation tubes 3 comprises: preparing a mold for the triangular plug-in insulation tube 3; casting the mold with insulation material or using 3D printing technology to prepare the triangular plug-in insulation tube 3; adding insulation material to the inside of the cylinder 32 of the triangular plug-in insulation tube 3, installing the cylinder cover 31 on the cylinder 32, and sealing the triangular plug-in insulation tube 3; preparing a steel skeleton 2, and the preparation of the steel skeleton 2 comprises: processing and bending the steel bars to make a plurality of steel bars 23 with angles, and inspecting them; placing a plurality of main bars 21 along the width direction of the segment, and marking steel bars on the plurality of main bars 21. The reinforcement 23 is installed in the position; several rubber protection strips 4 are bonded to the contact part between the triangular inserted insulation tube 3 and the steel bars 23 and the double-legged stirrups 22; the double-legged stirrups 22 are installed and welded layer by layer in the order of double-legged stirrups 22 - steel bars 23 - inserted triangular inserted insulation tube 3 - double-legged stirrups 22; an inspection is carried out to determine whether it meets the requirements; concrete pouring, the concrete pouring includes: preparing the pipe segment mold; cleaning the pipe segment mold, inspecting and oiling; placing the steel skeleton 2 into the pipe segment mold and closing the mold; inserting and fixing the grouting pipe into the pipe segment mold for pouring, and at the same time performing integral mechanical vibration on the mold to compact the concrete; forming and curing, the forming and curing include: top surface treatment of the pipe segment; demoulding and cleaning the mold; curing the pipe segment; testing the anti-permeability, strength and thermal insulation performance of the pipe segment.

[0053] The high-temperature tunnel insulation segment produced by the method for preparing the high-temperature tunnel insulation segment provided by the present invention significantly improves the thermal insulation performance of the segment while ensuring the basic strength and impermeability of the segment. The steel skeleton 2, which comprises a truss structure comprising a plurality of main bars 21, a plurality of double-legged stirrups 22, and a plurality of angled steel bars 23, significantly improves the strength, compressive and shear resistance, and stability of the segment, completing the strength compensation of the segment. The use of a plurality of triangular insert-type insulation tubes 3 enhances the thermal insulation performance of the segment, fully utilizes the internal space of the steel skeleton 2, reduces the amount of concrete used, significantly reduces the density of the segment, improves the safety and stability of the segment structure, and makes its construction and transportation more convenient.

[0054] In some possible implementations, the preparation of the segment mold includes: setting the circumferential section of one side of the segment mold to transparent tempered glass, and setting grouting holes at the upper and lower parts of the segment mold.

[0055] This is due to the use of transparent tempered glass on one side of the segment mold and grouting holes at the top and bottom of the mold. This allows for bidirectional grouting of the insulated segments, and allows for real-time observation of the segment pouring process, allowing for manual intervention at any time to avoid concrete faults during pouring and improve the success rate of the segment pouring process. Furthermore, when the mold is mechanically vibrated integrally to compact the concrete, the expelled gas is discharged through the grouting holes at the top of the segment mold.

[0056] In some possible implementations, the curing of the pipe segments includes: covering the surface of the pipe segments with a plastic film and performing static curing for 24 hours; performing pool curing for 7-14 days; performing spray curing for 0-7 days; and performing natural curing until the age of 28 days.

[0057] Those skilled in the art will understand that by covering the surface of the pipe segment with a plastic film, performing static curing for 24 hours, then performing pool curing for 7-14 days, performing spray curing for 0-7 days, and finally naturally curing to the age of 28 days, it can be ensured that there is sufficient moisture inside the pipe segment concrete for hydration reaction, ensuring the normal growth of concrete strength and avoiding cracks, thereby ensuring the strength and durability of the pipe segment.

[0058] Since the second embodiment and the first embodiment are embodiments of the same inventive concept and some of their structures are exactly the same, the structures in the second embodiment that are essentially the same as those in the first embodiment will not be elaborated on in detail. For the parts not described in detail, please refer to the first embodiment.

[0059] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. However, these modifications, changes, or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments of the present invention. They should all be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

[0060] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A high ground temperature tunnel insulation segment, characterized in that: The high ground temperature tunnel insulation segment comprises: A concrete layer (1), a steel skeleton (2), and a plurality of triangular inserted heat-insulating tubes (3); the steel skeleton (2) is a truss structure, and the steel skeleton (2) includes a plurality of main bars (21), a plurality of double-legged stirrups (22), and a plurality of angled steel bars (23); the main bars (21) are a fan-ring structure, and a plurality of the main bars (21) are arranged at intervals along the width direction of the pipe segment, and a plurality of the double-legged stirrups (22) are arranged at intervals along the circumferential direction of the pipe segment, and each of the double-legged stirrups (22) is fixed to the outside of the plurality of the main bars (21); each of the A plurality of the steel bars (23) are arranged inside the main reinforcement (21) and are distributed adjacently along the circumferential direction of the pipe segment. Each of the steel bars (23) is fixedly connected to the main reinforcement (21). Each of the triangular inserted thermal insulation tubes (3) is inserted into the interior of a plurality of the main reinforcements (21) and is in close contact with the steel bars (23) and the main reinforcements (21). Concrete is filled in the connecting gaps between the steel skeleton (2) and the plurality of triangular inserted thermal insulation tubes (3) to form the concrete layer (1). A concrete protective layer (11) is provided on the outside of the concrete layer (1). The main rib (21) comprises an outer main rib (211) in a curved structure and an inner main rib (212) in a curved structure, two ends of the outer main rib (211) are respectively fixedly connected to two ends of the inner main rib (212) to form the main rib (21) of a fan-ring structure, and the diameter of the inner main rib (212) is larger than the diameter of the outer main rib (211); The high ground temperature tunnel insulation segment further comprises: a plurality of rubber protection strips (4); the plurality of rubber protection strips (4) are arranged at the contact portion between the triangular inserted insulation tube (3) and the steel bar (23), and at the contact portion between the triangular inserted insulation tube (3) and the double-legged stirrup (22); The triangular insertable heat-insulating cylinder (3) is a heat-insulating cylinder with a hollow interior made of heat-insulating material. Each of the triangular insertable heat-insulating cylinders (3) comprises a cylinder cover (31) and a cylinder body (32). One end of the cylinder cover (31) is detachably connected to one end of the cylinder body (32). The plurality of triangular insert-type thermal insulation tubes (3) include a first thermal insulation tube (33), a second thermal insulation tube (34) and a third thermal insulation tube (35); the plurality of steel bars (23) adjacently distributed along the circumferential direction of the tube segment and fixedly connected to a corresponding main reinforcement (21) form a gap including a first gap, a second gap and a third gap; the shape of the end face of the first thermal insulation tube (33) is adapted to the shape of the first gap; the shape of the end face of the second thermal insulation tube (34) is adapted to the shape of the second gap; and the shape of the end face of the third thermal insulation tube (35) is adapted to the shape of the third gap.

2. The high ground temperature tunnel insulation segment according to claim 1, characterized in that: The concrete protective layer (11) comprises an outer convex surface and an inner concave surface, and water stop grooves (5) are symmetrically provided on both sides of the outer convex surface and on both sides of the inner concave surface.

3. The high ground temperature tunnel insulation segment according to claim 2, characterized in that: A plurality of bolt holes (6) are provided in the middle of the four sides of the concrete protective layer (11).

4. A method for preparing a high geothermal tunnel insulation segment, for preparing the high geothermal tunnel insulation segment according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: A plurality of triangular insert-type heat-insulating cylinders (3) are prepared, wherein the preparation of the plurality of triangular insert-type heat-insulating cylinders (3) comprises: preparing a mold for the triangular insert-type heat-insulating cylinder (3); casting the mold with a heat-insulating material to prepare the triangular insert-type heat-insulating cylinder (3); adding heat-insulating material inside a cylinder body (32) of the triangular insert-type heat-insulating cylinder (3), installing a cylinder cover (31) on the cylinder body (32), and sealing the triangular insert-type heat-insulating cylinder (3); Prepare a steel skeleton (2), the preparation of the steel skeleton (2) comprising: processing and bending the steel bars to form a plurality of steel bars (23) with angles, and inspecting the steel bars; placing a plurality of main bars (21) along the width direction of the pipe segment, and marking the installation positions of the steel bars (23) on the plurality of main bars (21); bonding a plurality of rubber protection strips (4) to the contact portions between the triangular inserted thermal insulation tube (3) and the steel bars (23) and the double-legged stirrups (22); installing and welding the double-legged stirrups (22) layer by layer in the order of the double-legged stirrups (22) - the steel bars (23) - the inserted triangular inserted thermal insulation tube (3) - the double-legged stirrups (22); and inspecting to determine whether the requirements are met; Casting concrete, the casting concrete comprising: preparing a segment mold; cleaning the segment mold, inspecting and oiling the segment mold; placing a steel skeleton (2) into the segment mold and closing the mold; inserting and fixing a grouting pipe into the segment mold and casting, while casting, mechanically vibrating the mold as a whole to compact the concrete; Forming and curing, said forming and curing including: top surface treatment of the segments; demoulding and cleaning of the molds; curing of the segments; and testing of the segments' impermeability, strength and thermal insulation properties.

5. The method for preparing thermal insulation segments for high ground temperature tunnels according to claim 4, characterized in that: The preparation of the pipe segment mold includes: setting the circumferential section of one side of the pipe segment mold to transparent tempered glass, and setting grouting holes on the upper part and the lower part of the pipe segment mold.

6. The method for preparing thermal insulation segments for high ground temperature tunnels according to claim 5, characterized in that: The maintenance of the pipe segments includes: covering the surface of the pipe segments with plastic film and performing static maintenance for 24 hours; performing pool maintenance for 7-14 days; performing spray maintenance for 0-7 days; and performing natural maintenance until the age of 28 days.

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