A large-span tunnel composite support system

Abstract

This application relates to a large-span tunnel composite support system, belonging to the technical field of tunnel support. To a certain extent, it solves the problems of insufficient strength, poor durability and complex construction of existing large-span support structures. It includes a slope body, in which a tunnel is provided. A plurality of deep holes are opened on the inner wall of the tunnel, and the plurality of deep holes are distributed in a matrix. Grouting holes communicating with the deep holes are opened on the side of the deep holes. An anchor rod mechanism is installed in the deep holes. The anchor rod mechanism includes a rod body assembly and a connection assembly. The rod body assembly is inserted into the deep holes, the connection assembly is connected to one end of the rod body assembly, and the connection assembly protrudes out of the deep holes. A first series connection piece and a second series connection piece are installed on the connection assembly. The first series connection piece connects in series a plurality of anchor rod mechanisms arranged along a first direction, and the second series connection piece connects in series a plurality of anchor rod mechanisms arranged along a second direction. A support plate is arranged inside the tunnel. The connection assembly restricts the support plate at the end of the anchor rod mechanism and is spaced from the inner wall of the tunnel.

Description

Technical Field

[0001] This application relates to the field of tunnel support, and more particularly, to a composite support system for large-span tunnels. Background Art

[0002] As an important part of modern transportation infrastructure construction, large-span tunnels are widely used in railway and highway projects, especially playing a key role in mountainous and complex terrain areas. Such tunnels can not only effectively reduce the interference to the natural ecological environment, but also significantly improve the road traffic capacity and driving safety. With the continuous advancement of China's transportation infrastructure construction, significant progress has been made in the design and construction technologies of large-span tunnels.

[0003] However, due to its significant excavation span characteristics, large-span tunnels are more vulnerable to the influence of stratum stress compared to conventional tunnels, resulting in engineering risks such as deformation and collapse. Especially in mountainous geological environments, the complex rock layer structure and the existence of goafs often lead to the change and destruction of the natural balance state between the surface and the lithosphere, thereby inducing geological disasters such as goaf collapse. It should be noted that existing tunnel support structures generally have technical problems such as insufficient strength, poor durability, and complex construction processes when dealing with large-span projects, which pose severe challenges to the safety and stability of large-span tunnels. Therefore, in-depth research on the support technology of large-span tunnels and its optimization solutions is of great practical significance for ensuring project safety and improving construction quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a composite support system for large-span tunnels to solve, to a certain extent, the problems of insufficient strength, poor durability, and complex construction of existing large-span support structures.

[0005] A composite support system for large-span tunnels provided by the present invention includes a slope body, in which a tunnel is provided. A plurality of deep holes are formed in the inner wall of the tunnel, and the plurality of deep holes are distributed in a matrix. Grouting holes communicating with the deep holes are formed in the side portions of the deep holes; an anchor rod mechanism is installed in the deep holes, and the anchor rod mechanism includes a rod body assembly and a connection assembly. The rod body assembly is inserted into the deep holes, and the connection assembly is connected to one end of the rod body assembly and protrudes out of the deep holes; a first series connection member and a second series connection member are installed on the connection assembly. The first series connection member connects a plurality of the anchor rod mechanisms arranged along a first direction in series, and the second series connection member connects a plurality of the anchor rod mechanisms arranged along a second direction in series; a support plate is provided inside the tunnel, and the connection assembly restricts the support plate at the end of the anchor rod mechanism and is spaced apart from the inner wall of the tunnel.

[0006] Among them, the rod body assembly includes a positioning rod, a plug, a connecting piece, a lining plate and a claw body; the positioning rod extends along the axial direction of the deep hole, one end of the positioning rod passes through the connecting assembly and is located outside the deep hole, the plug is arranged at the end of the positioning rod away from the connecting assembly, and the connecting piece is arranged on the positioning rod; the lining plate extends along the axial direction of the deep hole, one end of the claw body is rotatably connected to the connecting piece, a strip-shaped hole is formed at the position of the lining plate corresponding to the claw body, and the other end of the claw body passes through the strip-shaped hole.

[0007] Specifically, there are multiple lining plates, and the multiple lining plates are evenly distributed around the circumference of the connecting piece; the claw body is arranged corresponding to the lining plate.

[0008] Furthermore, there are multiple connecting pieces, and the multiple connecting pieces are arranged at intervals along the axial direction of the positioning rod; mounting grooves corresponding to the lining plates are formed on the circumference of the connecting piece, and the claw bodies are arranged in the mounting grooves.

[0009] Even further, the rod body assembly further includes a limiting tube, the connecting piece is slidably connected to the positioning rod, the limiting tube is sleeved on the positioning rod and is located between two adjacent connecting pieces, and both ends of the limiting tube are abutted against the connecting piece.

[0010] Among them, the rod body assembly includes a positioning rod, a plug, a connecting piece, a hinge seat and a lining plate; the positioning rod extends along the axial direction of the deep hole, one end of the positioning rod passes through the connecting assembly and is located outside the deep hole, the plug is arranged at the end of the positioning rod away from the connecting assembly, and the connecting piece is arranged on the positioning rod; the lining plate extends along the axial direction of the deep hole, one end of the lining plate is fixedly connected to the connecting assembly, and the other end is connected to the hinge seat, and the hinge seat is rotatably connected to the connecting piece.

[0011] Specifically, the connecting assembly includes a baffle plate, a sleeve, a threaded head and an adjusting piece; the baffle plate includes a plate body part and a column body part, the column body part is inserted into the deep hole, and a first assembly hole axially penetrating the baffle plate is formed in the column body part, the threaded head is connected to the end of the positioning rod away from the plug, and a second assembly hole axially penetrating the sleeve is formed on the sleeve; one end of the sleeve is inserted into the first assembly hole, the threaded head is inserted into the first assembly hole, and a threaded part is formed at the end of the threaded head away from the positioning rod, and the threaded part is inserted into the second assembly hole, the adjusting piece is located in the sleeve, and the adjusting piece is in threaded cooperation with the threaded part.

[0012] Furthermore, the threaded head also includes a positioning portion, an outer wall of the positioning portion is formed with a first matching portion extending axially, a second matching portion extending axially along the first assembly hole is formed at a position corresponding to the first matching portion in the first assembly hole, and the first matching portion and the second matching portion are plugged into each other.

[0013] Furthermore, a cross groove is formed at one end of the sleeve away from the baffle, and the cross groove can form a first limiting space for limiting the first series member along the first direction and a second limiting space for limiting the second series member along the second direction.

[0014] Furthermore, the connection assembly further comprises a locking piece, the outer wall surface of the portion of the sleeve forming the cross groove is formed with a thread, the locking piece is threadably matched with the sleeve, and can close the end of the sleeve.

[0015] Compared with the prior art, the large-span tunnel composite support system provided by this application has the following advantages:

[0016] The large-span tunnel composite support system provided by the present application includes a slope body, a tunnel is arranged in the slope body, a plurality of deep holes are opened on the inner wall of the tunnel, the plurality of deep holes are distributed in a matrix manner, and grouting holes connected to the deep holes are opened on the sides of the deep holes; an anchor mechanism is installed in the deep hole, the anchor mechanism includes a rod body assembly and a connecting assembly, the rod body assembly is inserted into the deep hole, the connecting assembly is connected to one end of the rod body assembly, and the connecting assembly protrudes out of the deep hole; a first series member and a second series member are installed on the connecting assembly, the first series member connects in series a plurality of anchor mechanisms arranged in a first direction, and the second series member connects in series a plurality of anchor mechanisms arranged in a second direction; a support plate is arranged in the tunnel, the connecting assembly limits the support plate to the end of the anchor mechanism, and is spaced apart from the inner wall of the tunnel.

[0017] From this analysis, it can be seen that by opening multiple deep holes in the inner wall of the tunnel, and the deep holes are distributed in a matrix, and anchor rod mechanisms are installed in the deep holes, so that the anchor rod mechanisms are arranged in a matrix. The present application further connects a first series member extending along a first direction and a second series member extending along a second direction at one end of the anchor rod mechanism protruding from the deep hole, thereby connecting multiple anchor rod mechanisms arranged in a matrix, thereby improving the strength and durability of the overall support structure.

[0018] Furthermore, since grouting holes are formed at the positions corresponding to the deep holes in the present application, after the first series member and the second series member are connected to the corresponding anchor mechanism, the grouting holes can be used to inject concrete into the deep holes to combine the concrete with the anchor mechanism, thereby further improving the support strength and stability of the overall system.

[0019] It can be understood that since the support system provided by the present application only requires drilling holes, inserting the bolt mechanism, and connecting the first series member and the second series member, the construction process is made simpler and the operation efficiency is improved.

[0020] And since the present application further provides a backing plate, and the connecting component restricts the backing plate to the end of the bolt mechanism, an accommodation cavity can be formed between the backing plate and the inner wall of the tunnel. By pouring concrete into the accommodation cavity, the first series member and the second series member can be further combined with the concrete, thereby further improving the support capacity and effect of the overall system and enhancing the durability of the support of the overall system.

[0021] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0023] Figure 1 Schematic diagram of the overall structure of the present invention;

[0024] Figure 2 Schematic diagram of the partial structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 Schematic diagram of the sectional structure;

[0026] Figure 4 For the present invention Figure 3 Enlarged schematic diagram at A;

[0027] Figure 5 Schematic diagram of the tunnel of the present invention;

[0028] Figure 6 Schematic diagram of the installation of the bolt mechanism of the present invention;

[0029] Figure 7 Schematic diagram of the connecting component of the present invention;

[0030] Figure 8 Schematic of the bolt mechanism of the present invention Figure 1 ;

[0031] Figure 9 Schematic diagram of the partial unfolding of the present invention;

[0032] Figure 10 For the present invention Figure 9Cross-sectional schematic diagram;

[0033] Figure 11 Schematic diagram of the anchor rod mechanism of the present invention Figure 2 ;

[0034] Figure 12 Partial schematic diagram of the present invention;

[0035] Figure 13 For the present invention Figure 12 Cross-sectional schematic diagram.

[0036] Icons: 1 - slope body; 101 - tunnel; 102 - deep hole; 103 - grouting hole; 2 - anchor rod mechanism; 201 - baffle; 2011 - column part; 2012 - second mating part; 202 - sleeve; 2021 - cross groove; 203 - adjusting part; 204 - threaded head; 2041 - first mating part; 205 - positioning rod; 206 - plug; 207 - connecting part; 208 - claw body; 209 - lining plate; 2091 - strip hole; 210 - limiting tube; 3 - first series part; 4 - second series part; 5 - supporting plate; 6 - locking part; 601 - first nut; 602 - second nut. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0038] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0040] As shown Figures 1 - 6 in the figure, the large-span tunnel 101 composite support system provided by the present application includes a slope body 1. There is a tunnel 101 inside the slope body 1. A plurality of deep holes 102 are formed on the inner wall of the tunnel 101. The plurality of deep holes 102 are distributed in a matrix. A grouting hole 103 communicating with the deep hole 102 is formed on the side of the deep hole 102. An anchor rod mechanism 2 is installed in the deep hole 102. The anchor rod mechanism 2 includes a rod body assembly and a connection assembly. The rod body assembly is inserted into the deep hole 102. The connection assembly is connected to one end of the rod body assembly, and the connection assembly protrudes out of the deep hole 102. A first series connection member 3 and a second series connection member 4 are installed on the connection assembly. The first series connection member 3 connects a plurality of anchor rod mechanisms 2 arranged along a first direction in series. The second series connection member 4 connects a plurality of anchor rod mechanisms 2 arranged along a second direction in series. A support plate 5 is arranged inside the tunnel 101. The connection assembly restricts the support plate 5 at the end of the anchor rod mechanism 2 and is spaced from the inner wall of the tunnel 101.

[0041] Compared with the prior art, the large-span tunnel 101 composite support system provided by the present application has the following advantages:

[0042] The large-span tunnel 101 composite support system provided by the present application includes a slope body 1. Through a plurality of deep holes 102 formed on the inner wall of the tunnel 101, and the deep holes 102 are distributed in a matrix, and the anchor rod mechanism 2 is installed in the deep holes 102, so that the anchor rod mechanisms 2 are arranged in a matrix. Further, the present application connects a first series connection member 3 extending along a first direction and a second series connection member 4 extending along a second direction at one end of the anchor rod mechanism 2 protruding out of the deep hole 102, so that a plurality of anchor rod mechanisms 2 arranged in a matrix can be connected, thereby improving the strength and durability of the overall support structure.

[0043] Moreover, since a grouting hole 103 is also formed corresponding to the position of the deep hole 102 in the present application, after the first series connection member 3 and the second series connection member 4 are connected to the corresponding anchor rod mechanisms 2, concrete can be injected into the deep hole 102 by using the grouting hole 103 to combine the concrete with the anchor rod mechanism 2, thereby further improving the support strength and stability of the overall system.

[0044] It can be understood that since the support system provided by the present application only needs to open holes, insert the anchor rod mechanism 2, and connect the first series connection member 3 and the second series connection member 4, the construction process is made simpler and the operation efficiency is improved.

[0045] Since the present application further provides a supporting plate 5 and the connecting assembly restricts the supporting plate 5 to the end of the bolt mechanism 2, a receiving cavity can be formed between the supporting plate 5 and the inner wall of the tunnel 101. By pouring concrete into the receiving cavity, the first series connection member 3 and the second series connection member 4 can be further combined with the concrete, thereby further improving the support capacity and effect of the overall system, enhancing the durability of the support of the overall system, and then realizing the support for the rock stratum structure of the slope body, and alleviating the problem that the rock stratum structure is prone to collapse when stressed.

[0046] It should be further noted here that both the first series connection member 3 and the second series connection member 4 in the present application are threaded steel bars, so as to have relatively high hardness and ensure the support capacity.

[0047] It should be further noted here that the density of the deep holes 102 on the inner wall of the tunnel 101 is directly related to the surrounding rock grade. At the same time, the bolt spacing should meet the requirement of "support coverage range", generally not greater than 1 / 2 of the bolt length, to ensure the formation of an effective combined arch structure; for grade V surrounding rock: high-density bolt support is required, usually with a spacing of 0.6 - 1.0 m and a row spacing of 0.8 - 1.2 m; for grade III - IV surrounding rock, the spacing can be appropriately increased to 1.0 - 1.5 m and the row spacing to 1.2 - 1.5 m; for grade I - II surrounding rock: bolts can be set only in local fractured zones or stress concentration areas, and a lower density can be set.

[0048] Embodiment 1

[0049] Based on the above structure, as Figures 8 - 10 shown, one implementation manner of the bolt assembly is provided. Specifically, the rod body assembly includes a positioning rod 205, a plug 206, a connecting member 207, a lining plate 209, and a claw body 208; the positioning rod 205 extends along the axial direction of the deep hole 102, one end of the positioning rod 205 passes through the connecting assembly and is located outside the deep hole 102, the plug 206 is arranged at the end of the positioning rod 205 away from the connecting assembly, and the connecting member 207 is arranged on the positioning rod 205; the lining plate 209 extends along the axial direction of the deep hole 102, one end of the claw body 208 is rotatably connected to the connecting member 207, and a strip-shaped hole 2091 is formed in the lining plate 209 corresponding to the position of the claw body 208, and the other end of the claw body 208 passes through the strip-shaped hole 2091.

[0050] The positioning rod 205 in the present application is a steel cable, which has relatively high hardness, so as to ensure that it will not shift axially due to gravity or the connecting member 207.

[0051] By arranging the plug 206 at one end of the positioning rod 205, it can be avoided that the connecting member 207 moves and separates from the positioning rod 205.

[0052] Since one end of the claw body 208 in the present application is rotatably connected to the connecting member 207, and the connecting member 207 is fixedly arranged on the positioning rod 205, therefore, during actual operation, when the positioning rod 205 is pulled, the connecting member 207 can be driven to move, thereby driving the claw body 208 to move. It can be understood that since a strip-shaped hole 2091 is formed at the position of the lining plate 209 corresponding to the claw body 208 in the present application, when the claw body 208 reaches the limit position of the strip-shaped hole 2091, it can rotate relative to the connecting member 207, so that the claw body 208 can open outward and clamp the inner wall of the deep hole 102, realizing the stable positioning between the overall anchor rod mechanism 2 and the deep hole 102.

[0053] It can be understood that when the anchor rod mechanism 2 penetrates into the deep hole 102, the claw body 208 is in close contact with the lining plate 209. After reaching the position, by operating the positioning rod 205, the claw body 208 can be opened, so that the claw body 208 can be used to clamp the inner wall of the deep hole 102, and then the positioning of the overall anchor rod mechanism 2 can be realized. After the positioning is completed, concrete is injected into the deep hole 102 through the grouting hole 103, so that the claw body 208 can be combined with the concrete, further improving the stability of the overall structure.

[0054] Optionally, in this embodiment, there can be multiple lining plates 209, and the multiple lining plates 209 are evenly distributed around the circumference of the connecting member 207; the claw body 208 is correspondingly arranged with the lining plate 209.

[0055] Preferably, three claw bodies 208 are arranged on the circumference of a single connecting member 207 in the present application. Correspondingly, three lining plates 209 are arranged around, so that the overall force can be evenly distributed and the stability of the overall structure after positioning can be ensured.

[0056] Correspondingly, as Figure 9 shown, there are multiple connecting members 207 in the present application, and the multiple connecting members 207 are arranged at intervals along the axial direction of the positioning rod 205; an installation groove corresponding to the lining plate 209 is formed on the circumference of the connecting member 207, and a claw body 208 is arranged in each installation groove.

[0057] Embodiment 2

[0058] As Figure 10 shown, based on the structure of Embodiment 1, another implementation manner is further provided. Specifically, in Embodiment 2, the rod body assembly further includes a limiting tube 210. The connecting member 207 is slidably connected to the positioning rod 205. The limiting tube 210 is sleeved on the positioning rod 205 and is located between two adjacent connecting members 207. Both ends of the limiting tube 210 are in contact with the connecting member 207.

[0059] When the positioning rod 205 is pulled, the plug 206 can move in the direction approaching the connecting member 207 until it abuts against the connecting member 207. When the positioning rod 205 is further pulled, the connecting member 207 can be driven to slide on the positioning rod 205. The sliding of the connecting member 207 can push the limiting tube 210 to slide on the positioning rod 205 and further push the next connecting member 207 to slide on the positioning rod 205, and so on, to realize the sliding of all the connecting members 207 on the positioning rod 205. The sliding of the connecting member 207 can drive the claw body 208 to rotate simultaneously, so as to realize the above positioning action.

[0060] Embodiment 3

[0061] As Figures 11 - 13 shown, another implementation manner of removing the claw body 208 is provided. Specifically, in Embodiment 3, the rod assembly includes a positioning rod 205, a plug 206, a connecting member 207, a hinge seat and a lining plate 209. The positioning rod 205 extends along the axial direction of the deep hole 102. One end of the positioning rod 205 passes through the connecting assembly and is located outside the deep hole 102. The plug 206 is arranged at the end of the positioning rod 205 far from the connecting assembly. The connecting member 207 is arranged on the positioning rod 205. The lining plate 209 extends along the axial direction of the deep hole 102. One end of the lining plate 209 is fixedly connected with the connecting assembly, and the other end is connected with the hinge seat. The hinge seat is rotatably connected with the connecting member 207.

[0062] In this embodiment, the connecting member 207 can be slidably connected or fixedly connected to the positioning rod 205. When slidably connected, pulling the positioning rod 205 relies on the plug 206 to realize the movement of the connecting member 207, and the fixed connection can directly realize the movement of the connecting member 207, which will not be elaborated here.

[0063] In the above two ways, when the connecting member 207 moves, it can drive the hinge seat to move. Since one end of the lining plate 209 is connected to the hinge seat and the hinge seat is rotatably connected to the connecting member 207, when the positioning member is continuously pulled, the two ends of the lining plate 209 will tend to approach each other continuously, resulting in outward bending. The bent lining plate 209 abuts against the inner wall of the deep hole 102, thereby realizing the positioning between the overall anchor mechanism 2 and the deep hole 102.

[0064] Optionally, as Figure 7As shown in the figure, based on the above structure, the connecting component in the present application includes a baffle 201, a sleeve 202, a threaded head 204, and an adjusting member 203; the baffle 201 includes a plate body portion and a column body portion 2011. The column body portion 2011 is inserted into the deep hole 102, and a first assembly hole penetrating the baffle 201 along the axial direction is formed in the column body portion 2011. The threaded head 204 is connected to one end of the positioning rod 205 away from the plug 206. A second assembly hole penetrating the sleeve 202 along the axial direction of the sleeve 202 is formed in the sleeve 202; one end of the sleeve 202 is inserted into the first assembly hole, the threaded head 204 is inserted into the first assembly hole, and a threaded portion is formed at one end of the threaded head 204 away from the positioning rod 205. The threaded portion is inserted into the second assembly hole. The adjusting member 203 is located inside the sleeve 202 and is in threaded cooperation with the threaded portion.

[0065] When it is necessary to pull the positioning rod 205, it needs to be realized by using the connecting component provided in the present application. Moreover, the connecting component provided in the present application is also the structure for positioning the first series member 3 and the second series member 4.

[0066] The threaded head 204 in the present application includes a threaded portion and a positioning portion. During assembly, the positioning portion is inserted into the first assembly hole, and at the same time, the sleeve 202 is inserted into the first assembly hole, while the threaded portion is inserted into the second assembly hole.

[0067] It can be understood that the adjusting member 203 in the present application is a nut. The adjusting member 203 is located in the second assembly hole. When the threaded portion enters the second assembly hole, it can be in threaded cooperation with the nut. Thus, when the sleeve 202 is rotated to drive the nut to rotate, the threaded portion can be made to move relatively, and further, the positioning rod 205 can be pulled to move to achieve the above actions.

[0068] Preferably, a first engaging portion 2041 extending along the axial direction is formed on the outer wall of the positioning portion in the present application. A second engaging portion 2012 extending along the axial direction of the first assembly hole is formed at a position corresponding to the first engaging portion 2041 in the first assembly hole. The first engaging portion 2041 and the second engaging portion 2012 are inserted into each other.

[0069] The first engaging portion 2041 in the present application can be a rib or a groove. Correspondingly, when the first engaging portion 2041 is a rib, the second engaging portion 2012 is a groove, and when the first engaging portion 2041 is a groove, the second engaging portion 2012 is a rib. Through the cooperation between the first engaging portion 2041 and the second engaging portion 2012, the threaded head 204 can be restricted, thereby avoiding the problem that when the adjusting member 203 is rotated, the threaded head 204 is driven to rotate, affecting the positioning rod 205 and the claw body 208 or the lining plate 209.

[0070] Optionally, as Figures 7 - 9As shown, a cross groove 2021 is formed at one end of the sleeve 202 away from the baffle 201 in the present application, and the cross groove 2021 can form a first limiting space for limiting the first series member 3 along the first direction and a second limiting space for limiting the second series member 4 along the second direction.

[0071] by Figure 9 Taking the direction as an example, the first direction in the present application is the vertical direction and the second direction is the horizontal direction. Therefore, the first limiting space is formed along the vertical direction, so that the first series component 3 is arranged along the first limiting space, and the second limiting space is formed along the horizontal direction, so that the second series component 4 is arranged along the second limiting space.

[0072] Alternatively, if Figure 11 Combination Figure 12 As shown, the connection assembly in the present application further includes a locking member 6 , and the outer wall surface of the portion of the sleeve 202 forming the cross groove 2021 is formed with a thread, and the locking member 6 is threadedly matched with the sleeve 202 and can close the end of the sleeve 202 .

[0073] like Figure 4 As shown, the locking member 6 in the present application includes a first nut 601 and a second nut 602 , the first nut 601 and the second nut 602 are arranged at an interval, and the support plate 5 is clamped between the first nut 601 and the second nut 602 , so as to ensure the stability of the support plate 5 .

[0074] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0075] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A composite support system for a large-span tunnel, comprising a slope, wherein a tunnel is arranged in the slope, characterized in that: A plurality of deep holes are opened on the inner wall of the tunnel, and the plurality of deep holes are distributed in a matrix manner, and grouting holes connected to the deep holes are opened on the sides of the deep holes; An anchor mechanism is installed in the deep hole, and the anchor mechanism includes a rod body component and a connecting component. The rod body component is inserted into the deep hole, and the connecting component is connected to one end of the rod body component, and the connecting component protrudes out of the deep hole; The connecting assembly is provided with a first series member and a second series member, wherein the first series member is connected in series with a plurality of the anchor rod mechanisms arranged in a first direction, and the second series member is connected in series with a plurality of the anchor rod mechanisms arranged in a second direction; A support plate is provided inside the tunnel, and the connection assembly restricts the support plate to the end of the anchor mechanism and is spaced apart from the inner wall of the tunnel; The connecting assembly includes a baffle, a sleeve, a threaded head and an adjusting piece; A cross groove is formed at one end of the sleeve away from the baffle, and the cross groove can form a first limiting space for limiting the first series member along the first direction and a second limiting space for limiting the second series member along the second direction; The connection assembly also includes a locking piece. The outer wall surface of the portion of the sleeve that forms the cross groove is formed with a thread. The locking piece is threadedly matched with the sleeve and can close the end of the sleeve.

2. The composite support system for large-span tunnels according to claim 1, characterized in that, The rod assembly includes a positioning rod, a plug, a connecting piece, a lining plate and a claw body; The positioning rod extends along the axial direction of the deep hole, one end of the positioning rod passes through the connecting assembly and is located outside the deep hole, the plug is arranged at one end of the positioning rod away from the connecting assembly, and the connecting member is arranged on the positioning rod; The lining plate extends along the axial direction of the deep hole, one end of the claw body is rotatably connected to the connecting piece, a strip hole is formed on the lining plate at a position corresponding to the claw body, and the other end of the claw body passes through the strip hole.

3. The composite support system for large-span tunnels according to claim 2, characterized in that There are multiple lining plates, and the multiple lining plates are evenly distributed around the circumference of the connecting piece; The claw body is arranged corresponding to the lining plate.

4. The composite support system for large-span tunnels according to claim 3, characterized in that, There are multiple connecting members, and the multiple connecting members are arranged at intervals along the axial direction of the positioning rod; The connecting member is formed with mounting grooves corresponding to the lining plate on the circumference thereof, and the claw bodies are arranged in the mounting grooves.

5. The composite support system for large-span tunnels according to claim 4, characterized in that, The rod body assembly also includes a limiting tube, the connecting member is slidably connected to the positioning rod, the limiting tube is sleeved on the positioning rod and is located between two adjacent connecting members, and both ends of the limiting tube are in contact with the connecting member.

6. The composite support system for large-span tunnels according to claim 1, wherein The rod assembly includes a positioning rod, a plug, a connecting piece, a hinge seat and a lining plate; The positioning rod extends along the axial direction of the deep hole, one end of the positioning rod passes through the connecting assembly and is located outside the deep hole, the plug is arranged at one end of the positioning rod away from the connecting assembly, and the connecting member is arranged on the positioning rod; The lining plate extends along the axial direction of the deep hole, one end of the lining plate is fixedly connected to the connecting assembly, and the other end is connected to the hinge seat, and the hinge seat is rotatably connected to the connecting piece.

7. The large-span tunnel composite support system according to claim 2 or 6, characterized in that, The baffle includes a plate body portion and a column body portion. The column body portion is inserted into the deep hole. The column body portion is formed with a first assembly hole that axially penetrates the baffle. The threaded head is connected to one end of the positioning rod away from the plug. A second assembly hole that axially penetrates the sleeve is formed on the sleeve. One end of the sleeve is inserted into the first assembly hole, the threaded head is inserted into the first assembly hole, and a threaded portion is formed at one end of the threaded head away from the positioning rod. The threaded portion is inserted into the second assembly hole. The adjusting member is located inside the sleeve, and the adjusting member is in threaded cooperation with the threaded portion.

8. The composite support system for large-span tunnels according to claim 7, characterized in that, The threaded head further includes a positioning portion. An outer wall of the positioning portion is formed with a first engaging portion extending axially. A second engaging portion extending axially along the first assembly hole is formed at a position corresponding to the first engaging portion in the first assembly hole. The first engaging portion and the second engaging portion are plugged together.

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