A multi-functional steel support device and system for underground caverns

Abstract

The application provides a multifunctional steel support device and system for underground caverns, a first support structure comprising a hollow first support body, an anchor rod connected with a first connecting joint on one side of the first support body, a first joint spherical ball connected with the other side of the first support body, and a plurality of first connecting pieces of different angles arranged on the first joint spherical ball; a second support structure comprising a hollow second support body, a grouting hole communicated with the hollow space formed in the second support body, a tray connected with one side of the first support body through a second connecting joint, a second joint spherical ball connected with the other side of the second support body, and a plurality of second connecting pieces of different angles arranged on the second joint spherical ball; one end of a support rod is connected with the first connecting piece of the first joint spherical ball, and the other end of the support rod is connected with the second connecting piece of the second joint spherical ball; and the application cancels the traditional self-supporting roof rock anchor beam or column on both sides, thereby reducing the construction difficulty.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering technology, and in particular to a multifunctional steel support device and system for underground caverns. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, the main types of underground cavern ceiling structures are as follows: (1) Self-supporting ceiling, which is usually composed of arch beams, rib beams and slabs. The arch beams can be precast reinforced concrete arch beams, cast-in-place reinforced concrete arch beams or steel arch beams. The ceiling load is mainly transmitted to the rock anchor beams or columns on both sides of the cavern through the main beams; (2) Traditional suspended ceiling, where the beams can be steel beams or reinforced concrete beams. The ceiling load is transmitted to the deep surrounding rock at the top of the cavern through tie rods.

[0004] Currently, the main forms of reinforced support structures for underground caverns are as follows: (1) Reinforced concrete beams are set along the cross section of the cavern, with traditional steel reinforcement binding, formwork and pouring procedures; (2) I-beam steel arch frames are set along the cross section of the cavern.

[0005] The inventors discovered that the aforementioned traditional underground cavern ceiling structures and reinforced support structures have the following drawbacks:

[0006] (1) Self-supporting roof: The roof load needs to be transferred to the rock anchor beams or columns on both sides of the cavern through the main beam. First of all, the rock anchor beams or columns at the rooting point of the roof on both sides are difficult to implement and the amount of work is large. The roof structure is only set on the rock wall as a load, which has an adverse effect on the stability of the surrounding rock of the cavern. (2) Traditional suspended roof uses steel beams or reinforced concrete beams. The roof load is transferred to the deep part of the surrounding rock at the top of the cavern through tie rods. It has disadvantages such as heavy structural self-weight and single function. (3) Traditional reinforced support structure uses reinforced concrete beams. The process is complicated and the construction is difficult. (4) Traditional reinforced support structure uses I-beam steel arch frame, which is not suitable for large-span underground caverns. (5) Single function: The roof structure support and the reinforced support structure support cannot be used interchangeably. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a multifunctional steel support device and system for underground caverns, which eliminates the need for traditional self-supporting ceiling rock anchor beams or columns on both sides, reducing construction difficulty, saving engineering work, and shortening the construction period.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides a multifunctional steel support device for underground caverns.

[0010] A multifunctional steel support device for underground caverns, comprising:

[0011] The first support structure, the support rod, the second support structure, and the anchor rod;

[0012] The first support structure includes a hollow first support body, the first support body has a grouting hole communicating with the hollow space, the anchor rod is connected to a first connecting joint on one side of the first support body, and a first joint ball is connected to the other side of the first support body. The first joint ball is provided with multiple first connecting pieces at different angles.

[0013] The second support structure includes a hollow second support body with a grouting hole communicating with the hollow space. One side of the second support body is connected to the tray through a second connecting joint, and the other side of the second support body is connected to a second joint ball. The second joint ball is provided with multiple second connecting pieces at different angles.

[0014] One end of the support rod is connected to the first connector of the first joint ball, and the other end of the support rod is connected to the second connector of the second joint ball. The tray is used to fix the first support plate.

[0015] As a further limitation of the first aspect of the present invention, the first support body is a hollow disk structure, and the second support body is a hollow disk structure.

[0016] As a further limitation of the first aspect of the present invention, the first support body is provided with a plurality of anchor rods that pass through the outer shell of the first support body and are connected to the grout after grouting, and the second support body is provided with a plurality of anchor rods that pass through the outer shell of the second support body and are connected to the grout after grouting.

[0017] As a further limitation of the first aspect of the present invention, the first support body has a monitoring device cable lead-out hole and a fall protection net connection hole.

[0018] As a further limitation of the first aspect of the present invention, the support rod includes a plurality of sub-support rods connected in sequence, and each adjacent sub-support rod is connected by a transition node ball, and the transition node ball is provided with a plurality of connectors in different directions.

[0019] Secondly, the present invention provides a multifunctional steel support system for underground caverns.

[0020] A multifunctional steel support system for underground caverns includes: a third support structure and a plurality of multifunctional steel support devices for underground caverns as described in the first aspect of the present invention.

[0021] The third support structure includes a hollow third support body with grouting holes communicating with the hollow space. An anchor rod is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body. The third joint ball is provided with multiple third connecting parts at different angles.

[0022] The first support plate is a horizontal plate, and vertical plates are vertically connected to both sides of the horizontal plate. The connection part between the third support body and the third joint ball passes through the vertical plate, and the anchor rod of the third support body is used to connect with the side wall.

[0023] Between two adjacent multi-functional steel support devices for underground caverns: the first joint ball is connected to the first joint ball by a connecting rod, and the first joint ball is connected to the second joint ball by a connecting rod.

[0024] Thirdly, the present invention provides a multifunctional steel support system for underground caverns.

[0025] A multifunctional steel support system for underground caverns includes: a third support structure and a plurality of multifunctional steel support devices for underground caverns as described in the first aspect of the present invention.

[0026] The third support structure includes a hollow third support body with grouting holes communicating with the hollow space. An anchor rod is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body. The third joint ball is provided with multiple third connecting parts at different angles.

[0027] The first support plate is a horizontal plate, and the anchor rods of the third support body are used to connect with the side wall;

[0028] Between two adjacent multi-functional steel support devices for underground caverns: the first joint ball is connected to the first joint ball by a connecting rod, and the first joint ball is connected to the second joint ball by a connecting rod.

[0029] Fourthly, the present invention provides a multifunctional steel support system for underground caverns.

[0030] A multifunctional steel support system for underground caverns includes: a third support structure and a plurality of multifunctional steel support devices for underground caverns as described in the first aspect of the present invention.

[0031] The third support structure includes a hollow third support body with grouting holes communicating with the hollow space. An anchor rod is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body. The third joint ball is provided with multiple third connecting parts at different angles.

[0032] The first support plate is a horizontal plate, and vertical plates are vertically connected to both sides of the horizontal plate. The connection part between the third support body and the third joint ball passes through the vertical plate, and the anchor rod of the third support body is used to connect with the side wall.

[0033] The anchor rod of the topmost first support structure is used to connect with the top wall. Each first joint ball of the topmost first support structure is connected to the third joint ball and the transition node ball of the adjacent lower third support body through diagonal tie rods.

[0034] The transition node ball is connected to the adjacent transition node ball and the third connector ball, respectively.

[0035] Fifthly, the present invention provides a multifunctional steel support system for underground caverns.

[0036] A multifunctional steel support system for underground caverns includes: a third support structure and a plurality of multifunctional steel support devices for underground caverns as described in the first aspect of the present invention.

[0037] The third support structure includes a hollow third support body with grouting holes communicating with the hollow space. An anchor rod is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body. The third joint ball is provided with multiple third connecting parts at different angles.

[0038] The first support plate is a horizontal plate, and the anchor rods of the third support body are used to connect with the side wall;

[0039] The anchor rod of the topmost first support structure is used to connect with the top wall. Each first joint ball of the topmost first support structure is connected to the third joint ball and the transition node ball of the adjacent lower third support body through diagonal tie rods.

[0040] The transition node ball is connected to the adjacent transition node ball and the third connector ball, respectively.

[0041] Sixthly, the present invention provides a multifunctional steel support system for underground caverns.

[0042] A multifunctional steel support system for underground caverns includes: a third support structure and a plurality of multifunctional steel support devices for underground caverns according to the first aspect of the present invention.

[0043] The third support structure includes a hollow third support body with grouting holes communicating with the hollow space. An anchor rod is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body. The third joint ball is provided with multiple third connecting parts at different angles.

[0044] The first support plate is a horizontal plate, and a vertical plate is vertically connected to one side of the horizontal plate. The connection part between the bottom third support body and the third joint ball passes through the vertical plate. The anchor rod of the third support body is used to connect with the side wall on one side.

[0045] Between two adjacent multi-functional steel support devices for underground caverns, the first joint sphere is connected to the first joint sphere by a connecting rod, and the first joint sphere is connected to the second joint sphere by a connecting rod. The anchor rod on the first support body is used to connect with the top wall.

[0046] It also includes a vertical second support plate, on which multiple multifunctional steel support devices for underground caverns as described in the first aspect of the present invention are fixed, and anchor rods on the second support plate are used to connect to the side wall on the other side.

[0047] Compared with the prior art, the beneficial effects of the present invention are:

[0048] 1. This invention innovatively proposes a multifunctional steel support device and system for underground caverns. The support device is attached to the surrounding rock (including the upper wall and side wall of the surrounding rock). It makes full use of the tensile strength of high-strength anchor bolts. After the support structure is assembled, the surrounding rock and the support structure work together to reinforce the surrounding rock. Moreover, this invention eliminates the rock anchor beams or columns on both sides of the traditional self-supporting ceiling, reducing construction difficulty, saving engineering work, and shortening the construction period.

[0049] 2. This invention innovatively proposes a multifunctional steel support device and system for underground caverns. The support device adopts joint spheres and transition nodes, with interfaces in multiple directions. It can be connected with rigid rods or suspended and pulled by steel cables, reducing the height loss of the steel (net) truss. The joint spheres, transition nodes and rods are all designed in a standardized manner, realizing the universality of the ceiling structure and the reinforced support structure.

[0050] 3. This invention innovatively proposes a multifunctional steel support device and system for underground caverns. The ceiling structure adopts a lightweight steel truss type, which can be used for spans of more than 25m, reducing the self-weight and solving the problems of heavy structural self-weight caused by the use of steel beams or reinforced concrete beams in traditional suspended ceilings.

[0051] 4. This invention innovatively proposes a multifunctional steel support device and system for underground caverns. It adopts all mechanical connections and is equipped with casting template joints. It can be assembled and then poured to form steel-reinforced concrete, or it can be used as a temporary support and disassembled after the cavern is stable. It can be reused repeatedly, which solves the problems of complex procedures and construction difficulties caused by the use of reinforced concrete beams in traditional support reinforcement structures. Attached Figure Description

[0052] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0053] Figure 1 A schematic diagram of the first support structure provided in Embodiment 1 of the present invention. Figure 1 ;

[0054] Figure 2 A schematic diagram of the first support structure provided in Embodiment 1 of the present invention. Figure 2 ;

[0055] Figure 3 This is a schematic diagram of the second support structure provided in Embodiment 1 of the present invention;

[0056] Figure 4 This is a schematic diagram of the transition node ball provided in Embodiment 1 of the present invention;

[0057] Figure 5 This is a schematic diagram of a multifunctional steel support system for underground caverns provided in Embodiment 2 of the present invention. Figure 1 ;

[0058] Figure 6 This is a schematic diagram of a multifunctional steel support system for underground caverns provided in Embodiment 2 of the present invention. Figure 2 ;

[0059] Figure 7 This is a schematic diagram of a multifunctional steel support system for underground caverns provided in Embodiment 2 of the present invention. Figure 3 ;

[0060] Wherein, 1-first support body; 2-shell; 3-first connecting joint; 4-anchor rod; 5-fallproof net connecting hole; 6-first joint ball; 7-first connector; 8-second support body; 9-second joint ball; 10-second connector; 11-tray; 12-transfer node ball; 13-first support structure; 14-second support structure; 15-third support structure; 16-anchor rod; 17-first support plate; 18-vertical plate; 19-second support plate; 20-support rod. Detailed Implementation

[0061] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0062] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0063] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0064] Example 1:

[0065] Embodiment 1 of the present invention provides a multifunctional steel support device for underground caverns, comprising: a first support structure 13, a support rod 20, a second support structure 14, and an anchor rod 16;

[0066] like Figure 1 and Figure 2 As shown, the first support structure 13 includes a hollow first support body 1, the first support body 1 has a grouting hole communicating with the hollow space, the anchor rod 16 is connected to the first connecting joint 3 on one side of the first support body 1, and the other side of the first support body 1 is connected to the first joint ball 6, and the first joint ball 6 is provided with a plurality of first connecting pieces 7 at different angles.

[0067] like Figure 3 As shown, the second support structure 14 includes a hollow second support body 8. The second support body 8 has a grouting hole communicating with the hollow space. One side of the second support body 8 is connected to the tray 11 through a second connecting joint. The other side of the second support body 8 is connected to a second joint ball 9. The second joint ball 9 is provided with a plurality of second connecting pieces 10 at different angles.

[0068] One end of the support rod is connected to the first connector 7 of the first connector ball 6, and the other end of the support rod is connected to the second connector 10 of the second connector ball 9. The tray 11 is used to fix the first support plate 17.

[0069] In this embodiment, the first support body 1 is a hollow disk structure, and the second support body 8 is a hollow disk structure, that is, the outer shell is 2 and the inner space is hollow.

[0070] In this embodiment, the first support body 1 is further provided with multiple anchor rods 4 that pass through the outer shell of the first support body 1 and are connected to the grout after grouting, and the second support body 8 is provided with multiple anchor rods 4 that pass through the outer shell of the second support body 8 and are connected to the grout after grouting.

[0071] In this embodiment, the first support body 1 is further provided with a monitoring device line lead-out hole and a fall protection net connection hole 5. The fall protection net connection hole 5 can provide another layer of safety guarantee for the underground cavern during construction. The arrangement of the monitoring device line lead-out hole facilitates the monitoring of the anchor rod 16.

[0072] In this embodiment, further, such as Figure 4As shown, the support rod 20 includes multiple sub-support rods connected in sequence. Each adjacent sub-support rod is connected by a transition node ball 12, which is provided with multiple connectors in different directions.

[0073] Example 2:

[0074] Embodiment 2 of the present invention provides a multifunctional steel support system for underground caverns, such as... Figure 5 As shown, it includes: multiple multifunctional steel support devices for underground caverns as described in Embodiment 1 of the present invention and a third support structure 15, all of which are made of steel.

[0075] When used in a ceiling structure, the third support structure 15 includes a hollow third support body (with the same structure as the second support body 8), the third support body has a grouting hole communicating with the hollow space, the anchor rod 16 is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body, and the third joint ball is provided with multiple third connecting pieces at different angles.

[0076] The first support plate 17 is a horizontal plate, and vertical plates 18 are vertically connected to both sides of the horizontal plate. The connection part between the third support body and the third joint ball (i.e. the connection part between the third support body and the third joint ball, so that the third support body is located on one side of the vertical plate 18 and the third joint ball is located on the other side of the vertical plate 18) passes through the vertical plate 18. The anchor rod 16 of the third support body is used to connect with the side wall.

[0077] Between two adjacent multi-functional steel support devices for underground caverns, the first joint ball 6 is connected to the first joint ball via a connecting rod (i.e., horizontal connection), and the first joint ball 6 is connected to the second joint ball 9 via a connecting rod (i.e., oblique connection). The anchor rod 16 on the first support body 1 is used to connect to the top wall.

[0078] Understandably, in some other implementations, part of the third support structure 15 does not pass through the vertical plate 18, that is, the anchor rods 16 of the third support structure 15 are directly connected to the side wall.

[0079] According to the support structure layout diagram, high-strength tensile anchor rods 16 are driven into the top and side walls of the cavern. The high-strength tensile anchor rods 16 protrude a certain length from the rock wall (the length is determined based on the thickness of the underground powerhouse lining and is greater than the length of the hole in the first connecting joint 3). The first connecting joint 3 is mechanically connected to the high-strength tensile anchor rods 16 via threaded connections. The angle of the first joint sphere 6 is adjusted by rotating the first support structure 13. After the first support structure 13 is installed, grout is injected into the hollow space of the first support body 1 through grouting holes. After the grout is compacted, the outer shell of the first support body 1 is tightly connected to the grout material via outer shell anchor bars. After the cavern lining construction is completed, connecting rods (using rigid rods) are connected using the first joint sphere 6. The bottom truss nodes are connected using the second support structure 14. After the first support plate 17 (such as a ceiling plate) is installed, it is mechanically connected to the bottom connection port of the second support structure 14 using a tray 11. The second joint sphere 9 is then connected to the connecting rod, forming a structure as shown in the diagram. Figure 5 The truss structure shown.

[0080] Understandably, in some other implementations, such as Figure 6 As shown, the anchor rod 16 of the topmost first support structure 13 is used to connect with the top wall. Each first joint ball 6 of the topmost first support structure 13 is connected to the third joint ball and the transition node ball 12 of the adjacent lower third support body through a tie rod. The transition node ball 12 is connected to the adjacent transition node ball 12 and the third joint ball.

[0081] At this point, steel cables are used to suspend and diagonally pull the truss, reducing the height loss of the steel (mesh) truss. According to the support structure layout diagram, high-strength tensile anchor rods 16 are driven into the top and side walls of the cavern. The high-strength tensile anchor rods 16 protrude a certain length from the rock wall (the length is determined based on the thickness of the underground powerhouse lining and is greater than the hole length of the first connecting joint 3). The first support structure 13 is connected to the high-strength tensile anchor rods 16 on both sides of the rock wall via threaded mechanical connections. The angle of the first joint ball 6 is adjusted by rotating the first support structure 13. Grouting is performed in the hollow space of the first support body 1. After the grouting is compacted, the outer shell of the first support body 1 is tightly connected to the grouting material through the outer shell anchor bars. The connecting rod (i.e., the rigid rod) is connected using the first joint ball 6. The truss nodes at the unrooted locations on the upper chord are connected using transition node balls 12. Steel cables connect the first joint ball 6 in the first support structure 13 to the transition node ball 12 on the upper chord of the truss, forming a structure as shown in the diagram. Figure 6 The suspended truss structure shown.

[0082] Understandably, in some other implementations, when used to support and reinforce structures, such as Figure 7As shown, it also includes a vertical second support plate 19, and multiple multifunctional steel support devices for underground caverns as described in Embodiment 1 of the present invention are fixed on the second support plate 19. Anchor rods 16 on the second support plate 19 are used to connect with the side wall on the other side. At this time, the second support plate 19 can replace the vertical plate 18 on the corresponding side of the first support plate 17 (the vertical plate 18 on the other side is preferably retained).

[0083] According to the support structure layout diagram, high-strength tensile anchor rods 16 are driven into the top and side walls of the cavern. The high-strength tensile anchor rods 16 protrude a certain length from the rock wall (the length is determined based on the thickness of the underground powerhouse lining and is greater than the length of the hole in the first connecting joint 3). The first connecting joint 3 is mechanically connected to the high-strength tensile anchor rods 16 via threaded connections. The angle of the first joint sphere 6 is adjusted by rotating the first support structure 13. After the first support structure 13 is installed, grout is injected into the hollow space of the first support body 1 through the grouting hole. After the grout is compacted, the outer shell of the first support body 1 is tightly connected to the grout material through the outer shell anchor bars. After the cavern lining construction is completed, connecting rods (using rigid rods) are connected using the first joint sphere 6. The bottom truss nodes are connected using the second support structure 14. After the first support plate 17 (such as a ceiling plate) is installed, it is mechanically connected to the bottom connection port of the second support structure 14 using a tray 11. The second joint sphere 9 is then connected to the connecting rod, forming a structure as shown in the diagram. Figure 7 The truss structure shown;

[0084] After the first support plate 17 is sealed, concrete is poured. After the pouring is completed, the formwork is removed to form a steel-reinforced concrete support structure. Optionally, this support structure is not poured with concrete and is used as a temporary support, which is then dismantled after the cavern is stable.

[0085] In terms of structure: When the support structure of this invention is used as a roof structure, the tensile anchor rod 16 and truss structure change the force transmission mode of the traditional self-supporting roof structure, transforming the roof structure, which is a vertical load that is not conducive to the safety of the cavern, into a support structure that can provide a certain reinforcement capacity for the surrounding rock of the cavern; when used as a support and reinforcement structure, the support structure of this invention adopts a steel truss structure, which can be applied to spans of more than 25m; this invention introduces a first support structure 13 (disc structure), and transmits the horizontal force to the rock wall through the first support structure 13 and grouting working together; to solve the problem of rock fragmentation around the anchor rod 16 near the outer side of the rock wall, grouting holes are set on the first support structure 13, and grouting is carried out after installation to fill the rock gaps and improve the bearing capacity of the anchor rod 16; the first support structure 13 of this invention is equipped with fall protection net connection holes 5, which can provide another layer of safety guarantee during the construction of the underground cavern.

[0086] In terms of economy: When used as a roof structure, rock anchor beams or reinforced concrete columns can be eliminated, reducing construction difficulty and the amount of rock blasting and concrete pouring work; when used as a support reinforcement structure, the support structure of this invention adopts mechanical connection throughout, with pouring template interfaces, allowing for assembly before pouring to form steel-reinforced concrete, or it can be used as a temporary support, which can be disassembled after the cavern is stable, and disassembly is convenient, greatly simplifying the construction process; in terms of manufacturing, each part can be standardized in design and manufacturing, and the component size can be selected according to different usage conditions; the nodes and rods of this invention adopt standardized design, realizing the universality of roof structure and reinforced support structure components.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multifunctional steel support system for underground caverns, characterized in that, include: Multiple multi-functional steel support devices for underground caverns and a third support structure; A multi-functional steel support system for underground caverns includes: The first support structure, the support rod, the second support structure, and the anchor rod; The first support structure includes a hollow first support body, the first support body has a grouting hole communicating with the hollow space, the anchor rod is connected to a first connecting joint on one side of the first support body, and a first joint ball is connected to the other side of the first support body. The first joint ball is provided with multiple first connecting pieces at different angles. The second support structure includes a hollow second support body with a grouting hole communicating with the hollow space. One side of the second support body is connected to the tray through a second connecting joint, and the other side of the second support body is connected to a second joint ball. The second joint ball is provided with multiple second connecting pieces at different angles. One end of the support rod is connected to the first connector of the first joint ball, and the other end of the support rod is connected to the second connector of the second joint ball. The tray is used to fix the first support plate. The first support body is provided with multiple anchor rods that pass through the outer shell of the first support body and are connected to the grout after grouting. The second support body is provided with multiple anchor rods that pass through the outer shell of the second support body and are connected to the grout after grouting. The third support structure includes a hollow third support body with grouting holes communicating with the hollow space. An anchor rod is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body. The third joint ball is provided with multiple third connecting parts at different angles. The first support plate is a horizontal plate, and vertical plates are vertically connected to both sides of the horizontal plate. The connection part between the third support body and the third joint ball passes through the vertical plate, and the anchor rod of the third support body is used to connect with the side wall. Between two adjacent multi-functional steel support devices for underground caverns: the first joint ball is connected to the first joint ball by a connecting rod, and the first joint ball is connected to the second joint ball by a connecting rod.

2. A multifunctional steel support system for underground caverns, comprising: Multiple multi-functional steel support devices for underground caverns and a third support structure; A multifunctional steel support device for underground caverns, characterized in that it comprises: The first support structure, the support rod, the second support structure, and the anchor rod; The first support structure includes a hollow first support body, the first support body has a grouting hole communicating with the hollow space, the anchor rod is connected to a first connecting joint on one side of the first support body, and a first joint ball is connected to the other side of the first support body. The first joint ball is provided with multiple first connecting pieces at different angles. The second support structure includes a hollow second support body with a grouting hole communicating with the hollow space. One side of the second support body is connected to the tray through a second connecting joint, and the other side of the second support body is connected to a second joint ball. The second joint ball is provided with multiple second connecting pieces at different angles. One end of the support rod is connected to the first connector of the first joint ball, and the other end of the support rod is connected to the second connector of the second joint ball. The tray is used to fix the first support plate. The first support body is provided with multiple anchor rods that pass through the outer shell of the first support body and are connected to the grout after grouting. The second support body is provided with multiple anchor rods that pass through the outer shell of the second support body and are connected to the grout after grouting. The support rod includes multiple sub-support rods connected in sequence. Each adjacent sub-support rod is connected by a transition node ball. The transition node ball is provided with multiple connectors in different directions. The third support structure includes a hollow third support body with grouting holes communicating with the hollow space. An anchor rod is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body. The third joint ball is provided with multiple third connecting parts at different angles. The first support plate is a horizontal plate, and vertical plates are vertically connected to both sides of the horizontal plate. The connection part between the third support body and the third joint ball passes through the vertical plate, and the anchor rod of the third support body is used to connect with the side wall. The anchor rod of the topmost first support structure is used to connect with the top wall. Each first joint ball of the topmost first support structure is connected to the third joint ball and the transition node ball of the adjacent lower third support body through diagonal tie rods. The transition node ball is connected to the adjacent transition node ball and the third connector ball, respectively.

3. The multifunctional steel support system for underground caverns as described in claim 2, characterized in that, The first support body is a hollow disc structure, and the second support body is a hollow disc structure.

4. The multifunctional steel support system for underground caverns as described in claim 2, characterized in that, The first support body has a monitoring device cable lead-out hole and a fall protection net connection hole.

5. A multifunctional steel support system for underground caverns, comprising: Multiple multi-functional steel support devices for underground caverns and a third support structure; A multifunctional steel support device for underground caverns, characterized in that it comprises: The first support structure, the support rod, the second support structure, and the anchor rod; The first support structure includes a hollow first support body, the first support body has a grouting hole communicating with the hollow space, the anchor rod is connected to a first connecting joint on one side of the first support body, and a first joint ball is connected to the other side of the first support body. The first joint ball is provided with multiple first connecting pieces at different angles. The second support structure includes a hollow second support body with a grouting hole communicating with the hollow space. One side of the second support body is connected to the tray through a second connecting joint, and the other side of the second support body is connected to a second joint ball. The second joint ball is provided with multiple second connecting pieces at different angles. One end of the support rod is connected to the first connector of the first joint ball, and the other end of the support rod is connected to the second connector of the second joint ball. The tray is used to fix the first support plate. The first support body is provided with multiple anchor rods that pass through the outer shell of the first support body and are connected to the grout after grouting. The second support body is provided with multiple anchor rods that pass through the outer shell of the second support body and are connected to the grout after grouting. The support rod includes multiple sub-support rods connected in sequence. Each adjacent sub-support rod is connected by a transition node ball. The transition node ball is provided with multiple connectors in different directions. The third support structure includes a hollow third support body with grouting holes communicating with the hollow space. An anchor rod is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body. The third joint ball is provided with multiple third connecting parts at different angles. The first support plate is a horizontal plate, and the anchor rods of the third support body are used to connect with the side wall; The anchor rod of the topmost first support structure is used to connect with the top wall. Each first joint ball of the topmost first support structure is connected to the third joint ball and the transition node ball of the adjacent lower third support body through diagonal tie rods. The transition node ball is connected to the adjacent transition node ball and the third connector ball, respectively.

6. A multifunctional steel support system for underground caverns, comprising: Multiple multi-functional steel support devices for underground caverns and a third support structure; A multifunctional steel support device for underground caverns, characterized in that it comprises: The first support structure, the support rod, the second support structure, and the anchor rod; The first support structure includes a hollow first support body, the first support body has a grouting hole communicating with the hollow space, the anchor rod is connected to a first connecting joint on one side of the first support body, and a first joint ball is connected to the other side of the first support body. The first joint ball is provided with multiple first connecting pieces at different angles. The second support structure includes a hollow second support body with a grouting hole communicating with the hollow space. One side of the second support body is connected to the tray through a second connecting joint, and the other side of the second support body is connected to a second joint ball. The second joint ball is provided with multiple second connecting pieces at different angles. One end of the support rod is connected to the first connector of the first joint ball, and the other end of the support rod is connected to the second connector of the second joint ball. The tray is used to fix the first support plate. The first support body is provided with multiple anchor rods that pass through the outer shell of the first support body and are connected to the grout after grouting. The second support body is provided with multiple anchor rods that pass through the outer shell of the second support body and are connected to the grout after grouting. The third support structure includes a hollow third support body with grouting holes communicating with the hollow space. An anchor rod is connected to a third connecting joint on one side of the third support body, and a third joint ball is connected to the other side of the third support body. The third joint ball is provided with multiple third connecting parts at different angles. The first support plate is a horizontal plate, and a vertical plate is vertically connected to one side of the horizontal plate. The connection part between the bottom third support body and the third joint ball passes through the vertical plate. The anchor rod of the third support body is used to connect with the side wall on one side. Between two adjacent multi-functional steel support devices for underground caverns, the first joint sphere is connected to the first joint sphere by a connecting rod, and the first joint sphere is connected to the second joint sphere by a connecting rod. The anchor rod on the first support body is used to connect with the top wall. It also includes a vertical second support plate, on which multiple multifunctional steel support devices for underground caverns are fixed, and anchor rods on the second support plate are used to connect to the side wall on the other side.

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