Large-span tunnel composite supporting system

Abstract

The invention relates to the technical field of tunnel supporting, in particular to a large-span tunnel composite supporting system which solves the problems that an existing large-span supporting structure is insufficient in strength, poor in durability and complex in construction to a certain extent and comprises a slope body, a tunnel is arranged in the slope body, and a plurality of deep holes are formed in the inner wall of the tunnel and distributed in a matrix mode. A grouting hole communicated with the deep hole is formed in the side part of the deep hole; an anchor rod mechanism is installed in the deep hole and comprises a rod body assembly and a connecting assembly, the rod body assembly is inserted into the deep hole, the connecting assembly is connected with one end of the rod body assembly, and the connecting assembly protrudes out of the deep hole; a first series-connection piece and a second series-connection piece are installed on the connecting assembly, the first series-connection piece is connected with the multiple anchor rod mechanisms arranged in the first direction in series, and the second series-connection piece is connected with the multiple anchor rod mechanisms arranged in the second direction in series; a supporting plate is arranged in the tunnel, the supporting plate is limited to the end of the anchor rod mechanism through the connecting assembly, and the supporting plate and the inner wall of the tunnel are arranged in a spaced mode.

Description

Technical Field

[0001] The present application relates to the field of tunnel support, and in particular, to a large-span tunnel composite support system. Background Art

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

[0003] However, due to their significant excavation span characteristics, large-span tunnels are more susceptible to stratum stress than conventional tunnels, resulting in engineering risks such as deformation and collapse. Especially in mountainous geological environments, complex rock structures and the existence of goafs often lead to changes and destruction in the natural equilibrium between the surface and the lithosphere, which in turn induce geological disasters such as goaf collapse. It is worth noting that when dealing with large-span projects, existing tunnel support structures generally have technical difficulties such as insufficient strength, poor durability, and complex construction processes. These factors pose severe challenges to the safety and stability of large-span tunnels. Therefore, in-depth research on the support technology and optimization solutions for large-span tunnels is of great practical significance for ensuring engineering safety and improving construction quality. Summary of the invention

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

[0005] The present invention provides a large-span tunnel composite support system, comprising a slope, a tunnel being arranged in the slope, a plurality of deep holes being opened on the inner wall of the tunnel, the plurality of deep holes being distributed in a matrix, and a grouting hole connected to the deep holes being opened on the side of the deep hole; an anchor mechanism is installed in the deep hole, the anchor mechanism comprises 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 the anchor mechanisms arranged in a first direction, and the second series member connects in series a plurality of the 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.

[0006] Wherein, the rod body assembly includes a positioning rod, a plug, a connecting piece, a lining plate and a claw body; the positioning rod extends axially along 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 an end of the positioning rod away from the connecting assembly, and the connecting piece is arranged on the positioning rod; the lining plate extends axially along 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 corresponding to the position of the claw body, and the other end of the claw body passes through the strip hole.

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

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

[0009] Furthermore, 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.

[0010] Wherein, the rod body assembly includes a positioning rod, a plug, a connecting piece, a hinge seat and a lining plate; the positioning rod extends axially along 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 piece is arranged on the positioning rod; the lining plate extends axially along 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, a sleeve, a threaded head and an adjusting member; the baffle includes a plate body and a column body, the column body is inserted into the deep hole, the column body is formed with a first assembly hole that axially passes through the baffle, the threaded head is connected to the end of the positioning rod away from the plug, and the sleeve is formed with a second assembly hole that axially passes through 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 the 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 in the sleeve, and the adjusting member is threadedly matched with the threaded portion.

[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: 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.

[0016] 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.

[0017] 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.

[0018] It can be understood that since the support system provided in the present application only requires drilling a hole, inserting an anchor mechanism, and connecting the first series member and the second series member, the construction process is simplified and the work efficiency is improved.

[0019] Since the present application further includes a support plate, and the connecting assembly restricts the support plate to the end of the anchor mechanism, a receiving cavity can be formed by the support plate and the inner wall of the tunnel, and the first series member and the second series member can be further combined with the concrete by pouring concrete in the receiving cavity, thereby further improving the support capacity and effect of the overall system and improving the durability of the support of the overall system.

[0020] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the local structure of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the cross-section structure; Figure 4 For the present invention Figure 3 A magnified schematic diagram of point A; Figure 5 It is a schematic diagram of the tunnel of the present invention; Figure 6 This is a schematic diagram of the installation of the anchor mechanism of the present invention; Figure 7 It is a schematic diagram of the connection assembly of the present invention; Figure 8 Schematic diagram of the anchor mechanism of the present invention Figure 1 ; Fig. 9 It is a partial schematic diagram of the present invention; Fig.10 For the present invention Fig. 9 Schematic cross-section diagram of Fig.11 Schematic diagram of the anchor mechanism of the present invention Figure 2 ; Fig.12 It is a partial schematic diagram of the present invention; Fig.13For the present invention Fig.12 Schematic cross-section diagram.

[0023] Icons: 1-slope; 101-tunnel; 102-deep hole; 103-grouting hole; 2-anchor mechanism; 201-baffle; 2011-column; 2012-second matching part; 202-casing; 2021-cross slot; 203-adjusting member; 204-threaded head; 2041-first matching part; 205-positioning rod; 206-plug; 207-connecting member; 208-claw; 209-lining plate; 2091-strip hole; 210-limiting tube; 3-first series member; 4-second series member; 5-support plate; 6-locking member; 601-first nut; 602-second nut. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] like Figure 1-Figure 6As shown, the composite support system for a large-span tunnel 101 provided in the present application includes a slope body 1, including a slope body 1, a tunnel 101 is arranged in the slope body 1, a plurality of deep holes 102 are opened on the inner wall of the tunnel 101, the plurality of deep holes 102 are distributed in a matrix, and a grouting hole 103 connected to the deep hole 102 is opened on the side of the deep hole 102; an anchor mechanism 2 is installed in the deep hole 102, the anchor mechanism 2 includes a rod body assembly and a connecting assembly, the rod body assembly is inserted into the deep hole 102, the connecting assembly is connected to one end of the rod body assembly, and the connecting assembly protrudes outside the deep hole 102; a first series member 3 and a second series member 4 are installed on the connecting assembly, the first series member 3 connects in series a plurality of anchor mechanisms 2 arranged in a first direction, and the second series member 4 connects in series a plurality of anchor mechanisms 2 arranged in a second direction; a support plate 5 is provided in the tunnel 101, and the connecting assembly limits the support plate 5 to the end of the anchor mechanism 2 and is spaced apart from the inner wall of the tunnel 101.

[0028] Compared with the prior art, the large-span tunnel 101 composite support system provided by this application has the following advantages: The composite support system for a large-span tunnel 101 provided in the present application includes a slope 1, a plurality of deep holes 102 opened on the inner wall of the tunnel 101, and the deep holes 102 are distributed in a matrix manner, and anchor mechanisms 2 are installed in the deep holes 102, so that the anchor mechanisms 2 are arranged in a matrix manner. The present application further connects a first series member 3 extending in a first direction and a second series member 4 extending in a second direction at one end of the anchor mechanism 2 protruding from the deep hole 102, thereby being able to connect the plurality of anchor mechanisms 2 arranged in a matrix manner, thereby being able to improve the strength and durability of the overall support structure.

[0029] Furthermore, since a grouting hole 103 is also formed at the position corresponding to the deep hole 102 of the present application, after the first series member 3 and the second series member 4 are connected to the corresponding anchor mechanism 2, the grouting hole 103 can be used to inject concrete into the deep hole 102 to combine the concrete with the anchor mechanism 2, thereby further improving the support strength and stability of the overall system.

[0030] It can be understood that since the support system provided in the present application only requires drilling a hole, inserting the anchor mechanism 2, and connecting the first series member 3 and the second series member 4, the construction process is simplified and the work efficiency is improved.

[0031] Since the present application is further provided with a support plate 5, and the connecting assembly restricts the support plate 5 to the end of the anchor mechanism 2, an accommodating cavity can be formed by the support plate 5 and the inner wall of the tunnel 101, and the first series member 3 and the second series member 4 can be further combined with the concrete by pouring concrete in the accommodating cavity, thereby further improving the support capacity and effect of the overall system, improving the durability of the support of the overall system, and then achieving support for the slope rock structure, alleviating the problem of the rock structure being prone to collapse when subjected to force.

[0032] It should be additionally explained here that the first series member 3 and the second series member 4 in the present application are both threaded steel bars, so that they can have a higher hardness and ensure the supporting capacity.

[0033] It should be further explained 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 rod spacing should meet the "support coverage" requirements, generally not more than 1 / 2 of the anchor length, to ensure the formation of an effective combined arch structure; Grade V surrounding rock: high-density anchor support is required, usually with a spacing of 0.6-1.0m and a row spacing of 0.8-1.2m; the spacing of Grade III-IV surrounding rock can be appropriately increased to 1.0-1.5m, with a row spacing of 1.2-1.5m; Grade I-II surrounding rock: anchors are only set in local fracture zones or stress concentration areas, and a lower density can be set.

[0034] Example 1 Based on the above structure, Figure 8-Figure 10 As shown, one embodiment of the anchor rod assembly is provided, specifically, the rod body assembly includes a positioning rod 205, a plug 206, a connecting piece 207, a lining 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 one end of the positioning rod 205 away from the connecting assembly, and the connecting piece 207 is arranged on the positioning rod 205; the lining 209 extends along the axial direction of the deep hole 102, one end of the claw body 208 is rotatably connected to the connecting piece 207, and a strip hole 2091 is formed on the lining 209 at a position corresponding to the claw body 208, and the other end of the claw body 208 passes through the strip hole 2091.

[0035] The positioning rod 205 in the present application is a steel cable with high hardness, thereby ensuring that there is no axial deviation due to gravity or the connecting member 207 .

[0036] By providing a plug 206 at one end of the positioning rod 205 , it is possible to prevent the connecting member 207 from moving and separating from the positioning rod 205 .

[0037] 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, when the positioning rod 205 is pulled in actual operation, the connecting member 207 can be driven to move, thereby driving the claw body 208 to move. It can be understood that since the lining plate 209 in the present application is formed with a strip hole 2091 at the position corresponding to the claw body 208, when the claw body 208 reaches the limit position of the strip hole 2091, it can rotate relative to the connecting member 207, so that the claw body 208 can be opened outward, clamping the inner wall of the deep hole 102, and realizing the stable positioning between the overall anchor mechanism 2 and the deep hole 102.

[0038] It is understandable that when the anchor mechanism 2 penetrates into the deep hole 102, the claw body 208 is close to the liner 209, and after it is in place, the claw body 208 can be opened by operating the positioning rod 205, so that the claw body 208 can be clamped with the inner wall of the deep hole 102, thereby realizing the positioning of the entire anchor mechanism 2. 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.

[0039] Optionally, in this embodiment, there may 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 arranged corresponding to the lining plates 209 .

[0040] Preferably, in the present application, three claws 208 are provided on the circumference of the single connecting member 207, and correspondingly, three lining plates 209 are provided around it, so that the overall force can be evenly distributed and the stability of the overall structure after positioning is ensured.

[0041] Accordingly, if Fig. 9 As 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; the connecting members 207 are formed with installation grooves corresponding to the lining plate 209 on the circumference, and claw bodies 208 are provided in the installation grooves.

[0042] Example 2 like Fig.10 As shown, based on the structure of Example 1, another embodiment is further provided. Specifically, in Example 2, the rod body assembly also 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, and both ends of the limiting tube 210 are abutted against the connecting member 207.

[0043] When the positioning rod 205 is pulled, the plug 206 can move in the direction close to the connecting piece 207 until it abuts against the connecting piece 207, and when the positioning rod 205 is further pulled, the connecting piece 207 can be driven to slide on the positioning rod 205, and the sliding of the connecting piece 207 can push the limiting tube 210 to slide on the positioning rod 205, and further push the next connecting piece 207 to slide on the positioning rod 205, and so on, to achieve the sliding of all the connecting pieces 207 on the positioning rod 205, and the sliding of the connecting piece 207 can simultaneously drive the claw body 208 to rotate, thereby achieving the above-mentioned positioning action.

[0044] Example 3 like Figure 11-13As shown, another embodiment of removing the claw body 208 is provided. Specifically, in Example 3, the rod body assembly includes a positioning rod 205, a plug 206, a connecting piece 207, a hinge seat and a lining plate 209; the positioning rod 205 extends axially along 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 one end of the positioning rod 205 away from the connecting assembly, and the connecting piece 207 is arranged on the positioning rod 205; the lining plate 209 extends axially along the deep hole 102, one end of the lining plate 209 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 207.

[0045] In this embodiment, the connecting member 207 can be slidably connected to the positioning rod 205 or fixedly connected. When slidably connected, the positioning rod 205 is pulled to rely on the plug 206 to realize the movement of the connecting member 207, while the fixed connection can directly realize the movement of the connecting member 207 and will not be repeated here.

[0046] When the connecting member 207 moves in the above two methods, the hinge seat can be driven 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, thereby bending outward, and 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.

[0047] Alternatively, if Figure 7 As shown, based on the above structure, the connection assembly 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 and a columnar body 2011, the columnar body 2011 is inserted into the deep hole 102, the columnar body 2011 is formed with a first assembly hole that passes through the baffle 201 along the axial direction, the threaded head 204 is connected to the end of the positioning rod 205 away from the plug 206, and the sleeve 202 is formed with a second assembly hole that passes through the sleeve 202 along the axial direction of 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 the end of the threaded head 204 away from the positioning rod 205 is formed with a threaded portion, the threaded portion is inserted into the second assembly hole, the adjusting member 203 is located in the sleeve 202, and the adjusting member 203 is threadedly matched with the threaded portion.

[0048] When the positioning rod 205 needs to be pulled, it needs to be implemented using the connection assembly provided in the present application, and the connection assembly provided in the present application is also a structure for positioning the first series member 3 and the second series member 4.

[0049] 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, while the sleeve 202 is inserted into the first assembly hole and the threaded portion is inserted into the second assembly hole.

[0050] It can be understood that the adjusting member 203 in the present application is a nut, and the adjusting member 203 is located in the second assembly hole. When the threaded portion enters the second assembly hole, it can cooperate with the nut thread, so that when the rotating sleeve 202 drives the nut to rotate, the threaded portion can produce relative movement, and then the positioning rod 205 can be pulled to move, thereby realizing the above-mentioned action.

[0051] Preferably, the outer wall of the positioning portion in the present application is formed with a first matching portion 2041 extending axially, and a second matching portion 2012 extending axially along the first assembly hole is formed at a position corresponding to the first matching portion 2041 in the first assembly hole, and the first matching portion 2041 and the second matching portion 2012 are plugged into each other.

[0052] The first matching portion 2041 in the present application can be a convex rib or a concave groove. Accordingly, when the first matching portion 2041 is a convex rib, the second matching portion 2012 is a concave groove, and when the first matching portion 2041 is a concave groove, the second matching portion 2012 is a convex rib. The matching between the first matching portion 2041 and the second matching portion 2012 can limit the thread head 204, thereby avoiding the problem that when the adjusting member 203 is rotated, the thread head 204 is driven to rotate, affecting the positioning rod 205 and the claw body 208 or the lining plate 209.

[0053] Alternatively, if Figure 7-Figure 9 As 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.

[0054] by Fig. 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.

[0055] Alternatively, if Fig.11 Combination Fig.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 .

[0056] like Figure 4As 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 .

[0057] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0058] 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 arranged 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.

2. The large-span tunnel composite support system according to claim 1 is 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 large-span tunnel composite support system according to claim 2 is 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 large-span tunnel composite support system according to claim 3 is 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 large-span tunnel composite support system according to claim 4 is 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 large-span tunnel composite support system according to claim 1 is characterized in that: 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 connecting assembly includes a baffle, a sleeve, a threaded head and an adjusting piece; The baffle comprises a plate body and a column body, the column body is inserted into the deep hole, a first assembly hole is formed on the column body and penetrates the baffle along the axial direction, the threaded head is connected to an end of the positioning rod away from the plug, and a second assembly hole is formed on the sleeve and penetrates the sleeve along the axial direction of 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 in the sleeve, and the adjusting member is threadedly matched with the threaded portion.

8. The large-span tunnel composite support system according to claim 7 is characterized in that: 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.

9. The large-span tunnel composite support system according to claim 7, characterized in that: 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.

10. The large-span tunnel composite support system according to claim 9, characterized in that: 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.

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