Fiber profile framework suitable for underground cavern support and manufacturing method thereof

Abstract

The invention provides a fiber profile framework suitable for underground cavern supporting and a manufacturing method thereof.The fiber profile framework suitable for underground cavern supporting comprises a supporting structure matched with a cavern in shape, the supporting structure can be integrally prefabricated through fiber composite sectional materials, the fiber composite sectional materials are adopted for machining the fiber profile framework, an original steel arch is replaced, and the fiber profile framework is light in self weight and high in strength; the fiber composite section bar has the characteristics of corrosion resistance, high temperature resistance and aging resistance, the material performance meets the engineering safety requirement, and the difficulty of on-site transportation, worker assembly and supporting and fixing can be reduced by utilizing the characteristic of light self weight of the fiber composite section bar; and meanwhile, the first supporting section, the second supporting section and the connecting component are simple in structure and can be buckled and propped against each other during on-site assembly, so that temporary fixing and on-site assembly are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of underground cavern support, and in particular to a fiber profile frame suitable for underground cavern support and a manufacturing method thereof. Background Art

[0002] With the development of infrastructure construction and new energy industries in my country, underground cavern structures are increasing in various projects, and tunnel excavation is indispensable. As a commonly used tunnel support method, profile arch structure is often used in areas with poor geological conditions. The current arch structure usually adopts the type of steel arch, but due to the humid tunnel environment, the steel structure is prone to rust. In a humid environment, the steel arch has poor durability, and the steel structure is heavy, making it difficult to transport and install. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a fiber profile frame suitable for underground cavern support, which can solve the problems of heavy weight, difficulty in transportation and installation, and easy corrosion of steel structure arch frames as tunnel support structures.

[0004] To this end, the present invention adopts the following technical solutions: A fiber profile frame suitable for underground cavern support comprises a support structure adapted to the shape of the cavern, wherein the support structure can be integrally prefabricated from a fiber composite profile.

[0005] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or use these further technical solutions in combination: The support structure can also be divided into a first support segment and a second support segment and is prefabricated in sections from a fiber composite profile. The first support segment is fixedly connected to the second support segment via a connecting member, and the connecting member is prefabricated from a fiber composite profile.

[0006] The fibers in the fiber composite profile can be selected from basalt fiber / glass fiber profile / carbon fiber.

[0007] The cross section of the support structure can be selected from H-type / C-type / rectangular / circular / special-shaped cross section types.

[0008] The cross-sectional type of the first supporting segment and the second supporting segment is selected to be H-shaped, the two side wing surfaces of the first supporting segment and the second supporting segment are parallel to the cave wall, a first connecting rib is provided between the two side wing surfaces of the first supporting segment, and a second connecting rib is provided between the two side wing surfaces of the second supporting segment, the connecting member includes a receiving portion located in the middle, and the upper and lower surfaces of the receiving portion are respectively provided with a first connecting segment and a second connecting end, a first limiting groove into which the first connecting rib / the second connecting rib can be inserted is provided in the middle of the first connecting segment, and a second limiting groove into which the first connecting rib / the second connecting rib can be inserted is provided in the middle of the second connecting segment.

[0009] The first connecting section includes a first limit block and a second limit block located on both sides of the first limit groove, and the second connecting section includes a third limit block and a fourth limit block located on both sides of the second limit groove, the first limit block and the second limit block are located between the two side wing surfaces of the first support section, and the two are respectively fixedly connected to the two side wing surfaces of the first support section by bolts, and the third limit block and the fourth limit block are located between the two side wing surfaces of the second support section, and the two are respectively fixedly connected to the two side wing surfaces of the second support section by bolts.

[0010] The bottom of the support structure is connected to a prefabricated concrete foundation, and the lower side of the support structure is fixedly connected to a plurality of locking anchor rods.

[0011] The first supporting segment is in an arch shape and its two ends are bent vertically downward. The two ends of the first supporting segment are respectively connected to a vertical second supporting segment through a connecting member.

[0012] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a method for manufacturing a fiber profile frame suitable for underground cavern support, which can solve the problems of heavy weight, difficulty in transportation and installation, and easy corrosion of steel structure arch frames as tunnel support structures.

[0013] To this end, the present invention adopts the following technical solutions: A method for manufacturing a fiber profile frame suitable for underground cavern support, wherein the forming of the support structure comprises the following steps: 1. Preforming of support structure The fiber yarn is passed through a honeycomb yarn-threading plate to avoid fiber yarn entanglement, and then the fiber yarn is impregnated with resin in a hot-melt resin pool to make the fiber yarn fully contact with the resin. The impregnated fiber yarn is added to the felt net, and then the two are preformed through a support structure model. According to the size of the tunnel section and geological conditions, the cross-sectional type and size to be selected are determined. The processing cross-sectional type of the support structure model can be selected from one of the H-type / C-type / rectangular / circular / special-shaped cross-sectional types. The cross-sectional shape of the fiber yarn after preforming is the same as the processing cross-sectional shape; 2. Injection molding of support structure After preforming, the fiber is pulled into a support structure mold made according to the processing section of the support structure model, hot melt resin is injected, and three-stage heating extrusion molding is performed through a thermoplastic machine. Water cooling is set at the end of the mold to perform preliminary cooling molding on the molded fiber composite profile; 3. Use injection molded fiber composite profiles to manufacture support structures The support structure can be prefabricated in two ways: as a whole or in sections. According to the shape of the underground cavern, the shape of the support structure can be selected from one of the following: circular / gate-shaped / horseshoe-shaped. If the support structure is prefabricated as a whole, the shape and length of the support structure can be designed according to the shape and size of the underground cavern. If prefabrication is adopted in sections, the shape and length of the first support section and the second support section need to be designed respectively according to the shape and size of the underground cavern. According to different situations, molding guide wheels are arranged on the outlet side of the thermoplastic machine. The number and guide trajectory of the molding guide wheels are determined according to the prefabrication method of the support structure. The fiber composite profile after injection molding is pulled and fixed along the molding guide rail by a hydraulic traction machine, and finally fixed and molded after natural cooling to complete the processing of the support structure.

[0014] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or use these further technical solutions in combination: When the support structure is divided into a first support segment and a second support segment and is prefabricated in sections, the first support segment and the second support segment are fixedly connected by a connecting member, and the forming steps of the connecting member are as follows: 1. Preforming of connecting components The fiber yarn is passed through a honeycomb yarn-threading plate to avoid the fiber yarn from being entangled, and then the fiber yarn is impregnated with resin in a hot-melt resin pool to make the fiber yarn fully contact with the resin, and the impregnated fiber yarn is added to the felt net, and then the two are preformed through a connection component model, and the connection component is designed according to the cross-sectional type of the first support segment and the second support segment; 2. Injection molding of connecting components After preforming, the fiber is pulled into the connection component mold, hot melt resin is injected, and three-stage heating extrusion molding is performed through a thermoplastic machine. Water cooling is set at the end of the mold to perform preliminary cooling and molding on the molded connection component.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: the present invention adopts fiber composite profiles to process fiber profile frames to replace the original steel arch frames. In addition to light weight and high strength, the fiber composite profiles also have the characteristics of corrosion resistance, high temperature resistance and aging resistance. The material performance meets the engineering safety requirements, and the fiber composite profiles have the characteristics of light weight to reduce the difficulty of on-site transportation, assembly by workers, and support and fixation. At the same time, the first support section, the second support section, and the connecting member have simple structures and can be buckled against each other during on-site assembly, which is convenient for temporary fixation and on-site assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a typical cross-sectional schematic diagram of the present invention.

[0017] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram of the first supporting segment, the second supporting segment and the connecting component.

[0018] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.

[0019] Figure 4 It is a structural schematic diagram of the connecting component of the present invention.

[0020] Figure 5 It is a schematic diagram of one arrangement of the thermoplastic machine, molding guide wheel and hydraulic traction machine of the present invention.

[0021] Figure 6 These are the finite element calculation results of the fiber profile frame and the steel arch frame of the present invention. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent elements with the same or similar functions. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as limitations on the present invention. In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted, and the positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as limitations on the present invention.

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] The present invention provides a fiber profile frame suitable for underground cavern support, comprising a support structure 1 adapted to the shape of the cavern, and the support structure 1 can be prefabricated as a whole from a fiber composite profile.

[0025] The support structure 1 can also be divided into a first support segment 11 and a second support segment 12 and are prefabricated in sections from a fiber composite profile. The first support segment 11 and the second support segment 12 are fixedly connected via a connecting member 2, and the connecting member 2 is prefabricated from a fiber composite profile.

[0026] The fiber composite profile can be various fiber materials such as basalt fiber profile, glass fiber profile, carbon fiber profile, etc. In this embodiment, the fibers in the fiber composite profile can be selected from basalt fiber / glass fiber profile / carbon fiber.

[0027] The cross section of the support structure 1 can be selected from H-type / C-type / rectangular / circular / special-shaped cross section types.

[0028] In this embodiment, the cross-sectional type of the first supporting segment 11 and the second supporting segment 12 is selected to be H-shaped, and the two side wing surfaces of the first supporting segment 11 and the second supporting segment 12 are parallel to the cave wall. A first connecting rib 111 is provided between the two side wing surfaces of the first supporting segment 11, and a second connecting rib 121 is provided between the two side wing surfaces of the second supporting segment 12. The connecting member 2 includes a receiving portion 21 located in the middle, and the upper and lower surfaces of the receiving portion 21 are respectively provided with a first connecting segment 22 and a second connecting end 23. A first limiting groove 223 capable of inserting the first connecting rib 111 / the second connecting rib 121 is provided in the middle of the first connecting segment 22, and a second limiting groove 233 capable of inserting the first connecting rib 111 / the second connecting rib 121 is provided in the middle of the second connecting segment 23.

[0029] The first connecting section 22 includes a first limit block 221 and a second limit block 222 located on both sides of the first limit groove 223, and the second connecting section 23 includes a third limit block 231 and a fourth limit block 232 located on both sides of the second limit groove 233. The first limit block 221 and the second limit block 222 are located between the two side wing surfaces of the first supporting section 11, and the two are respectively fixedly connected to the two side wing surfaces of the first supporting section 11 by bolts. The third limit block 231 and the fourth limit block 232 are located between the two side wing surfaces of the second supporting section 12, and the two are respectively fixedly connected to the two side wing surfaces of the second supporting section 12 by bolts.

[0030] The bottom of the supporting structure 1 is connected to a prefabricated concrete foundation 3 , and the lower side of the supporting structure 1 is fixedly connected to a plurality of foot-locking anchor rods 4 .

[0031] The first supporting segment 11 is in an arch shape and its two ends are bent vertically downward. Both ends of the first supporting segment 11 are connected to a vertical second supporting segment 12 via a connecting member 2 .

[0032] In other embodiments, the shape of the supporting structure 1 can be processed into a circular shape, a gate shape, a horseshoe shape, etc. according to the underground cavern and engineering requirements; the connecting member 2 can adopt a horizontal connecting plate or a longitudinal connecting plate.

[0033] In other embodiments, the first support segment 11 and the second support segment 12 can be used alone to support the tunnel rock mass, or can be used together with one or more structures such as shotcrete, locking anchors, etc. to support the tunnel rock mass.

[0034] The present invention also provides a method for manufacturing a fiber profile frame suitable for underground cavern support, wherein the forming of the support structure 1 comprises the following steps: 1. Preforming of support structure The fiber yarn is passed through a honeycomb yarn-threading plate to avoid fiber yarn entanglement, and then the fiber yarn is impregnated with resin in a hot-melt resin pool to make the fiber yarn fully contact with the resin. The impregnated fiber yarn is added to the felt net, and then the two are preformed through a support structure model. According to the size of the tunnel section and geological conditions, the cross-sectional type and size to be selected are determined. The processing cross-sectional type of the support structure model can be selected from one of the H-type / C-type / rectangular / circular / special-shaped cross-sectional types. The cross-sectional shape of the fiber yarn after preforming is the same as the processing cross-sectional shape; 2. Injection molding of support structure After preforming, the fiber is pulled into a support structure mold made according to the processing section of the support structure model, hot melt resin is injected, and three-stage heating extrusion molding is performed by a thermoplastic machine 5. Water cooling is set at the end of the mold to perform preliminary cooling molding on the molded fiber composite profile; 3. Manufacturing support structures using injection molded fiber composite profiles 1 The support structure 1 can be prefabricated in two ways: as a whole or in sections. According to the shape of the underground cavern, the shape of the support structure 1 can be selected from one of circular / gate-shaped / horseshoe-shaped. If the support structure 1 is prefabricated as a whole, the shape and length of the support structure 1 can be designed according to the shape and size of the underground cavern. If prefabrication in sections is adopted, the shape and length of the first support segment 11 and the second support segment 12 need to be designed respectively according to the shape and size of the underground cavern. According to different situations, molding guide wheels 6 are arranged on the outlet side of the thermoplastic machine 5. The number and guide trajectory of the molding guide wheels 6 are determined according to the prefabrication method of the support structure 1. The fiber composite profile after injection molding is pulled and fixed along the molding guide rail 6 by the hydraulic traction machine 7, and finally fixed and molded after natural cooling to complete the processing of the support structure 1.

[0035] like Figure 5 The thermoplastic machine 5, the molding guide wheel 6, and the hydraulic traction machine 7 are arranged in one form. The number of molding guide wheels 6 is five pairs. The guide track of the molding guide wheel 6 is arc-shaped. The number and guide track of the molding guide wheel 6 can be changed and can be designed according to actual conditions. When the support structure 1 is divided into a first support segment 11 and a second support segment 12 and is prefabricated in sections, the first support segment 11 and the second support segment 12 are fixedly connected by a connecting member 2. The forming steps of the connecting member 2 are as follows: 1. Preforming of connecting components The fiber yarn is passed through a honeycomb yarn-threading plate to avoid the fiber yarn from being entangled, and then the fiber yarn is impregnated with resin in a hot-melt resin pool to make the fiber yarn fully contact with the resin, and the impregnated fiber yarn is added to the felt net, and then the two are preformed through a connection component model, and the connection component is designed according to the cross-sectional type of the first support segment 11 and the second support segment 12; 2. Injection molding of connecting components After preforming, the fiber is pulled into the connection component mold, hot melt resin is injected, and three-stage heating extrusion molding is performed by the thermoplastic machine 5. Water cooling is set at the end of the mold to perform preliminary cooling molding on the molded connection component 2.

[0036] When the support structure 1 is divided into a first support segment 11 and a second support segment 12 and is prefabricated in sections, the size of each section and the form of the connecting member 2 are determined according to the shape and size of the tunnel section. The installation steps of the prefabricated fiber profile frame are as follows: 1. Transport the processed first support segment 11, the second support segment 12 and the connecting member 2 to the tunnel excavation surface and assemble the fiber profile frame; 2. Before installation, clean up the slag and debris at the bottom of the fiber profile frame at the installation location to ensure that the fiber profile frame is placed on a stable rock wall; 3. After completion, a prefabricated concrete foundation 3 (concrete cushion layer plus prefabricated concrete blocks) is used as the foundation of the fiber profile frame at the bottom of the fiber profile frame. At the same time, according to the design requirements, determine whether to set a locking anchor rod 4 at the bottom of the fiber profile frame to lock it and close the arch frame in an entire ring; 4. After the arch frame is assembled, it can be determined whether sprayed concrete is needed according to the design requirements to fill the fiber profile frame structure and the tunnel rock wall densely and form a reliable support between the fiber profile frame and the tunnel rock wall.

[0037] When basalt fiber profiles are used to make fiber profile frames suitable for underground cavern support, the surrounding rock elastic modulus is 10GPa, the density is 2400kg / m³, and the burial depth is 60m. Considering the stress release of the surrounding rock in the actual project, the elastic modulus of the excavation area is reduced to 40% to simulate the binding constraint between the arch frame and the surrounding rock. The fiber profile frame consists of a first support segment 11, a second support segment 12, and a connecting member 2.

[0038] In this embodiment, the first supporting segment 11 and the second supporting segment 12 both adopt an H-shaped cross-section, specifically an I14 I-shaped profile cross-section.

[0039] In this embodiment, the cross section of the cavern is horseshoe-shaped, and the net height of the cavern is 4.53m.

[0040] In this embodiment, a finite element model of a fiber profile frame is established, wherein the elastic modulus of the basalt fiber profile frame is 50 GPa, and the density is 2000 kg / m³. Under the design load, the deformation results are analyzed. Figure 6 The maximum vertical deformation is 0.596 mm at the mid-span of the first support segment 11 at the highest point, and the maximum axial stress is 12 MPa, which meets the design specification requirements.

[0041] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the fiber profile frame suitable for underground cavern support and the manufacturing method thereof of the present invention, and can produce the positive effects recorded in the present invention.

[0042] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internally connected between two mechanisms, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the mechanism or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. The terms "first" and "second" are also used only for simplicity of description, and do not indicate or imply relative importance.

[0044] Furthermore, in practicing the claims of the present invention, those skilled in the art can understand and effect variations to the disclosed embodiments by studying the drawings, the disclosure and the appended claims. In addition, in the claims and the specification, the words "comprise", "contain" and the like do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. A fiber profile frame suitable for underground cavern support, characterized in that: It comprises a supporting structure (1) adapted to the shape of the cavern, wherein the supporting structure (1) can be integrally prefabricated from a fiber composite profile.

2. A fiber profile frame suitable for underground cavern support as claimed in claim 1, characterized in that: The support structure (1) can also be divided into a first support segment (11) and a second support segment (12) and is prefabricated in sections from a fiber composite profile; the first support segment (11) and the second support segment (12) are fixedly connected via a connecting member (2); the connecting member (2) is prefabricated from a fiber composite profile.

3. A fiber profile frame suitable for underground cavern support as claimed in claim 1 or 2, characterized in that: The fibers in the fiber composite profile can be selected from basalt fiber / glass fiber profile / carbon fiber.

4. A fiber profile frame suitable for underground cavern support as claimed in claim 1, characterized in that: The cross-section of the support structure (1) can be selected to be H-shaped / C-shaped / rectangular / circular / special-shaped.

5. A fiber profile frame suitable for underground cavern support as claimed in claim 2, characterized in that: The cross-sectional shape of the first supporting segment (11) and the second supporting segment (12) is selected to be H-shaped. The two side wing surfaces of the first supporting segment (11) and the second supporting segment (12) are parallel to the cave wall. A first connecting rib (111) is provided between the two side wing surfaces of the first supporting segment (11), and a second connecting rib (121) is provided between the two side wing surfaces of the second supporting segment (12). The connecting member (2) comprises a receiving portion (21) located in the middle. The upper and lower surfaces of the receiving portion (21) are respectively provided with a first connecting segment (22) and a second connecting end (23). The middle of the first connecting segment (22) is provided with a first limiting groove (223) capable of inserting the first connecting rib (111) / the second connecting rib (121), and the middle of the second connecting segment (23) is provided with a second limiting groove (233) capable of inserting the first connecting rib (111) / the second connecting rib (121).

6. A fiber profile frame suitable for underground cavern support as claimed in claim 5, characterized in that: The first connection section (22) comprises a first limit block (221) and a second limit block (222) located on both sides of the first limit groove (223); the second connection section (23) comprises a third limit block (231) and a fourth limit block (232) located on both sides of the second limit groove (233); the first limit block (221) and the second limit block (222) are located between the two side wing surfaces of the first support section (11) and are respectively fixedly connected to the two side wing surfaces of the first support section (11) by bolts; the third limit block (231) and the fourth limit block (232) are located between the two side wing surfaces of the second support section (12) and are respectively fixedly connected to the two side wing surfaces of the second support section (12) by bolts.

7. A fiber profile frame suitable for underground cavern support as claimed in claim 1, characterized in that: The bottom of the support structure (1) is connected to a prefabricated concrete foundation (3), and the lower side of the support structure (1) is fixedly connected to a plurality of foot-locking anchor rods (4).

8. A fiber profile frame suitable for underground cavern support as claimed in claim 2, characterized in that: The first support segment (11) is in the shape of a circular arch and has two ends that are bent vertically downwards; the two ends of the first support segment (11) are respectively connected to a vertical second support segment (12) via a connecting member (2).

9. A method for manufacturing a fiber profile frame suitable for underground cavern support, characterized in that: The forming of the support structure (1) comprises the following steps:

1. Preforming of support structure The fiber yarn is passed through a honeycomb yarn-threading plate to avoid fiber yarn entanglement, and then the fiber yarn is impregnated with resin in a hot-melt resin pool to make the fiber yarn fully contact with the resin. The impregnated fiber yarn is added to the felt net, and then the two are preformed through a support structure model. According to the size of the tunnel section and geological conditions, the cross-sectional type and size to be selected are determined. The processing cross-sectional type of the support structure model can be selected from one of the H-type / C-type / rectangular / circular / special-shaped cross-sectional types. The cross-sectional shape of the fiber yarn after preforming is the same as the processing cross-sectional shape; 2. Injection molding of support structure After preforming, the fiber is pulled into a support structure mold made according to the processing section of the support structure model, hot melt resin is injected, and three-stage heating extrusion molding is performed by a thermoplastic machine 5. Water cooling is set at the end of the mold to perform preliminary cooling molding on the molded fiber composite profile; 3. Manufacturing support structures using injection molded fiber composite profiles (1) The support structure (1) can be prefabricated in two ways: as a whole or in sections. According to the shape of the underground cavern, the shape of the support structure (1) can be selected from one of a circular shape, a city gate shape, and a horseshoe shape. If the support structure (1) is prefabricated as a whole, the shape and length of the support structure (1) can be designed according to the shape and size of the underground cavern. If the support structure (1) is prefabricated in sections, the shape and length of the first support section (11) and the second support section (12) need to be designed according to the shape and size of the underground cavern. According to different situations, a molding guide wheel (6) is arranged on the outlet side of the thermoplastic machine (5). The number and guide track of the molding guide wheel (6) are determined according to the prefabrication method of the support structure (1). The fiber composite profile after injection molding is pulled and fixed along the molding guide rail (6) by a hydraulic traction machine (7). Finally, it is fixed and molded after natural cooling, thereby completing the processing of the support structure (1).

10. A method for manufacturing a fiber profile frame suitable for underground cavern support as claimed in claim 9, characterized in that: When the support structure (1) is divided into a first support segment (11) and a second support segment (12) and is prefabricated in sections, the first support segment (11) and the second support segment (12) are fixedly connected via a connecting member (2), and the steps of forming the connecting member (2) are as follows:

1. Preforming of connecting components Passing the fiber yarn through a honeycomb yarn-threading plate to prevent the fiber yarn from being entangled, and then impregnating the fiber yarn with resin in a hot-melt resin pool so that the fiber yarn and the resin are fully in contact, adding the impregnated fiber yarn to the felt net, and then preforming the two through a connection component model, and designing the connection component according to the cross-sectional shape of the first support segment (11) and the second support segment (12); 2. Injection molding of connecting components After preforming, the fiber is pulled into a connection component mold, hot-melt resin is injected, and three-stage heating and extrusion molding is performed by a thermoplastic machine (5). Water cooling is provided at the end of the mold, and the molded connection component (2) is preliminarily cooled and molded.

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