A shallow-buried bias tunnel supporting structure and a construction method thereof

Abstract

The application relates to a shallow-buried bias tunnel supporting structure, which comprises a concrete layer and a steel reinforcement cage arranged in the concrete layer, the steel reinforcement cage comprises a plurality of arc-shaped arches and a plurality of penetrating steels for penetrating the arc-shaped arches, the arc-shaped arches are in an arch shape, and two ends of the arc-shaped arches are used for supporting the ground of the tunnel; the arc-shaped arches are formed by splicing a plurality of unit prefabricated frames, a connecting piece is arranged between two adjacent unit prefabricated frames, and the two adjacent unit prefabricated frames are connected with each other through the connecting piece; the unit prefabricated frame is provided with a penetrating channel for the penetrating steel to penetrate, the unit prefabricated frame is provided with a pressing piece, and the pressing piece is used for reducing the size of the penetrating channel to clamp the penetrating steel. The shallow-buried bias tunnel supporting structure can improve the construction efficiency of the steel reinforcement cage. The application also relates to a construction method of the shallow-buried bias tunnel supporting structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel support, in particular to a shallow-buried bias tunnel support structure and a construction method thereof. BACKGROUND

[0002] The shallow-buried bias tunnel is an important form in tunnel engineering, and has greater flexibility and plasticity in design and construction than the traditional deep-buried tunnel. The design of the shallow-buried bias tunnel first considers the topography and geomorphology, uses the bias of the geological structure to make the top and bottom of the tunnel not on the same horizontal plane, and then determines the structure form and equipment parameters according to various requirements.

[0003] In the prior art, after the shallow-buried bias tunnel is excavated, a steel reinforcement cage that is adapted to the shape of the tunnel inner wall is laid along the tunnel inner wall. After the steel reinforcement cage is laid, a lining plate is built to form a support area for pouring concrete. Finally, the concrete is pumped in, and after the concrete solidifies, the concrete and the steel reinforcement cage form a reinforced concrete layer that supports the tunnel inner wall.

[0004] However, when laying such a steel reinforcement cage, all the steel bars need to be manually tied and fixed one by one to connect all the steel bars to form a steel reinforcement cage that is staggered horizontally and vertically. The installation efficiency is low, time and labor are consumed, and the construction period is prolonged, so further improvement is needed. SUMMARY

[0005] In order to improve the construction efficiency of the steel reinforcement cage, the present application provides a shallow-buried bias tunnel support structure and a construction method thereof.

[0006] In a first aspect, the shallow-buried bias tunnel support structure provided by the present application adopts the following technical scheme:

[0007] A shallow-buried bias tunnel support structure, comprising a concrete layer and a steel reinforcement cage arranged in the concrete layer, the steel reinforcement cage comprising a plurality of arc-shaped arches and a plurality of penetrating steel bars for penetrating the arc-shaped arches, the arc-shaped arches being in an arch shape and the two ends of the arc-shaped arches being used to support the ground of the tunnel; the arc-shaped arches are formed by assembling a plurality of unit prefabricated frames, a connecting piece is arranged between adjacent two unit prefabricated frames, and the adjacent two unit prefabricated frames are connected to each other through the connecting piece; the unit prefabricated frame has a penetrating channel for the penetrating steel bars to penetrate, the unit prefabricated frame is provided with a pressing piece, and the pressing piece is used to reduce the size of the penetrating channel to clamp the penetrating steel bars.

[0008] By adopting the technical scheme, the arc-shaped arches are formed by mutually splicing the multiple unit prefabricated frames through the connecting pieces when the steel reinforcement cage is built, multiple arc-shaped arches are sequentially installed from the length direction of the tunnel, multiple steels are sequentially threaded in the threading channels of the unit prefabricated frames, and the multiple steels are clamped in the threaded steels by the abutting pieces, so that the multiple arc-shaped arches and the multiple threaded steels are connected into a whole to form the steel reinforcement cage, and the threaded steels do not need to be bound, thereby greatly improving the building efficiency of the steel reinforcement cage and reducing the construction period of the overall structure.

[0009] Optionally, the unit prefabricated frame comprises fixed rods, movable rods and a first abutting rod, two fixed rods are arranged at intervals, a connecting strip is arranged between the two fixed rods, and the two fixed rods are connected to each other through the connecting strip; the number of movable rods corresponds to the number of fixed rods, each movable rod is hinged to a corresponding fixed rod, and an installation area is formed between the two fixed rods and the two movable rods; the first abutting rod is arranged in the installation area and is hinged to the two movable rods; the first abutting rod and the two fixed rods and the first abutting rod and the two movable rods form the threading channels; and the abutting piece is arranged on the connecting strip to drive the first abutting rod to approach the movable rod.

[0010] By adopting the technical scheme, after the threaded steels are threaded in the threading channels, the first abutting rod is driven to slide by the abutting piece, the first abutting rod and the movable rod are hinged to each other, and the movable rod and the fixed rod are hinged to each other, so that when the first abutting rod moves, the size of the threading channel can be expanded or reduced to clamp the threaded steels threaded in the threading channel, improving the convenience of clamping the threaded steels.

[0011] Optionally, a first rotating rod is arranged between each movable rod and the first abutting rod, one end of the first rotating rod is hinged to the first abutting rod, the other end is hinged to a corresponding movable rod, and the first abutting rod and the movable rod are hinged to each other through the first rotating rod; a second rotating rod is arranged between each movable rod and a corresponding fixed rod, one end of the second rotating rod is hinged to the movable rod, and the other end is hinged to a corresponding fixed rod, and the movable rod and the fixed rod are hinged to each other through the second rotating rod.

[0012] By adopting the technical scheme, the first abutting rod and the movable rod are hinged to each other through the first rotating rod, and the movable rod and the fixed rod are hinged to each other through the second rotating rod, so that the size of the threading channel can be adjusted by the first abutting rod.

[0013] Optionally, the second rotating rods are arranged in plurality and are arranged along the axial direction of the fixed rod, the plurality of second rotating rods divide the through channel into a plurality of through regions for the plurality of steel bars to pass through.

[0014] By adopting the above technical scheme, the plurality of second rotating rods improves the stability of the overall structure, and the plurality of second rotating rods divide the through channel into a plurality of through regions for the plurality of steel bars to pass through.

[0015] Optionally, the second rotating rod is provided with a second abutting rod, the axial direction of the second abutting rod is consistent with the axial direction of the fixed rod, and when the first abutting rod moves towards the side close to the movable rod, the second rotating rod drives the second abutting rod to move towards the side close to the fixed rod to abut against the steel bar.

[0016] By adopting the above technical scheme, when the first abutting rod moves towards the side close to the movable rod, the size of the through channel between the first abutting rod and the movable rod is reduced, so that the steel bar passing through the through channel can be clamped; during the movement of the first abutting rod towards the side close to the movable rod, the first abutting rod pushes the movable rod to swing, so that the movable rod can drive the second abutting rod to move towards the side close to the fixed rod, and the size of the through channel between the first abutting rod and the fixed rod is reduced, so that the steel bar passing through the through channel can be clamped synchronously, and the first abutting rod and the second abutting rod can reduce the size of the two through channels synchronously to clamp the corresponding steel bars, thereby greatly improving the connection efficiency between the arc-shaped arch frame and all the steel bars.

[0017] Optionally, the connecting piece comprises two plug-in joints hinged to each other, and the plug-in sleeve is provided with a plug-in slot for inserting the fixed rod or the movable rod.

[0018] By adopting the above technical scheme, the plug-in slots of the two plug-in joints are used for inserting the fixed rod or the movable rod, so that the two unit prefabricated frames adjacent to each other can be connected together by the plug-in joints; the two plug-in joints are hinged to each other, so that a certain angle can be formed between the two plug-in joints, thereby enabling the two unit prefabricated frames connected together to form a certain angle, and further enabling the arc-shaped arch frame formed by the plurality of unit prefabricated frames to present an arc shape as a whole, so as to adapt to the inner wall of the tunnel and to adapt to the installation of tunnels of different sizes.

[0019] Optionally, the inner diameter of the insertion slot is greater than the outer diameter of the fixed rod or the outer diameter of the movable rod, and a plurality of elastic sheets are arranged in the insertion slot, and all the elastic sheets are arranged in the axial direction of the fixed rod or the axial direction of the movable rod, and when the fixed rod or the movable rod is inserted into the insertion slot, the elastic sheets are deformed and abut against the peripheral wall of the fixed rod or the peripheral wall of the movable rod.

[0020] By adopting the technical scheme, when the fixed rod or the movable rod is inserted into the insertion slot, the end surface of the fixed rod or the end surface of the movable rod pushes the elastic sheet and forces the elastic sheet to deform, so that the elastic sheet abuts against the peripheral wall of the fixed rod or the peripheral wall of the movable rod, thereby limiting the fixed rod or the movable rod, and the fixed rod or the movable rod is limited in the insertion slot, and the convenience of connection between the fixed rod and the insertion head and between the movable rod and the insertion head is improved.

[0021] Optionally, a plurality of communication grooves that communicate with the insertion slot are formed in the peripheral wall of the insertion head, and the communication grooves are used for allowing the concrete to flow into the insertion slot.

[0022] By adopting the technical scheme, the communication grooves are arranged to communicate with the insertion slot, and when the concrete is poured subsequently, the concrete can flow into the insertion slot through the communication grooves, and the concrete is solidified with the elastic sheets in the insertion slot, thereby fixing and connecting the fixed rod or the movable rod in the insertion slot, so that the fixed rod / movable rod and the insertion head are integrated, and the reinforcing effect of the two adjacent unit precast frames is improved.

[0023] Optionally, an adjusting hole that penetrates the connecting strip is formed in the side wall of the connecting strip close to the first abutting rod, the abutting member includes an abutting screw, one end of the abutting screw is arranged in the adjusting hole and abuts against the peripheral wall of the first abutting rod, and the abutting screw is threadedly connected with the adjusting hole.

[0024] By adopting the technical scheme, after the penetrating steel bar is arranged in the penetrating channel, the abutting screw is rotated by using a tool, so that the abutting screw can abut against the first abutting rod, thereby enabling the first abutting rod to move to change the size of the penetrating channel, and the penetrating steel bar can be clamped.

[0025] In a second aspect, the construction method of the shallow-buried and eccentrically compressed tunnel supporting structure provided in the present application adopts the following technical scheme:

[0026] The application discloses a construction method of a tunnel supporting structure under shallow-buried bias, and specifically comprises the following steps: S1, tunnel excavation; S2, installation of arc-shaped arch frames, a plurality of arc-shaped arch frames are installed at intervals along the length direction of the tunnel; S3, installation of the penetrating steel bars, the penetrating steel bars are penetrated into the corresponding penetrating channels and are abutted against the penetrating steel bars through the abutting members; S4, installation of the lining plates, the lining plates are built along the inner side of the arc-shaped arch frames to form a supporting area for pouring concrete; S5, filling of the concrete, the concrete is pumped into the supporting area to form a reinforced concrete layer supported on the inner wall of the tunnel; and S6, dismounting of the lining plates.

[0027] To sum up, the application has at least one of the following beneficial technical effects:

[0028] 1. By arranging the arc-shaped arch frames and the penetrating steel bars, when the steel reinforcement cage is built, a plurality of unit prefabricated frames are spliced with each other through the connecting members to form the arc-shaped arch frames, a plurality of arc-shaped arch frames are installed in sequence along the length direction of the tunnel, then the plurality of steel bars are sequentially penetrated into the penetrating channels of the unit prefabricated frames, and finally the penetrating steel bars are clamped through the abutting members, so that the plurality of arc-shaped arch frames and the plurality of penetrating steel bars are connected into a whole and form the steel reinforcement cage, without binding the penetrating steel bars, the construction efficiency of the steel reinforcement cage is greatly improved, and the construction period of the overall structure is shortened.

[0029] 2. By arranging the second abutting rod, when the first abutting rod moves towards the side close to the movable rod, the size of the penetrating channel between the first abutting rod and the movable rod is reduced, so that the penetrating steel bar penetrating into the penetrating channel can be clamped; in the process that the first abutting rod moves towards the side close to the movable rod, the first abutting rod drives the movable rod to swing, so that the movable rod can drive the second abutting rod to move towards the side close to the fixed rod, the second abutting rod reduces the size of the penetrating channel between the first abutting rod and the fixed rod, so that the penetrating steel bar penetrating into the penetrating channel can be clamped synchronously, the first abutting rod and the second abutting rod can synchronously reduce the size of the two penetrating channels to clamp the corresponding penetrating steel bars, and the connection efficiency between the arc-shaped arch frame and all the penetrating steel bars is greatly improved.

[0030] 3. By arranging the plug-in connector, the plug-in slot of each plug-in connector is used for inserting the fixed rod or the movable rod, so that the two adjacent unit prefabricated frames can be inserted and matched with each other through the two plug-in connectors and connected together; the two plug-in connectors are hinged with each other, so that a certain included angle can be formed between the two plug-in connectors, so that the two adjacent unit prefabricated frames can form a certain included angle after being connected, and then the arc-shaped arch frame formed by the combination of the plurality of unit prefabricated frames can integrally present an arc shape to adapt to the inner wall of the tunnel and can adapt to the installation of tunnels of different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of embodiment 1.

[0032] Figure 2 This is a schematic diagram illustrating the structure of the reinforcing cage in Example 1;

[0033] Figure 3 This is a schematic diagram illustrating the structure of the connector in Example 1;

[0034] Figure 4 This is a schematic diagram illustrating the structure of the prefabricated unit frame in Example 1;

[0035] Figure 5 This is a partial sectional view of Example 1, showing that the reinforcing bars are not inserted into the insertion channel;

[0036] Figure 6 This is a partial sectional view of the reinforcing bars passing through the passage in Example 1;

[0037] Figure 7 This is a partial cross-sectional view of the spring clip in Example 1.

[0038] Explanation of reference numerals in the attached drawings: 1. Concrete layer; 2. Arched frame; 3. Through-reinforcing steel bar; 4. Unit prefabrication frame; 41. Through-passage; 411. Through-passage area; 42. Fixed rod; 43. Movable rod; 44. First abutment rod; 45. Connecting strip; 451. Adjustment hole; 452. Tightening screw; 46. Installation area; 47. First rotating rod; 48. Second rotating rod; 49. Second abutment rod; 5. Plug-in joint; 51. Plug-in groove; 52. Spring piece; 53. Connecting groove; 54. Limiting post. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0040] Example 1:

[0041] This application discloses a shallow-buried biased tunnel support structure.

[0042] Reference Figure 1 , Figure 2 A shallow-buried biased tunnel support structure includes a concrete layer 1 and a steel cage set in the concrete layer 1. In this embodiment, the steel cage includes multiple arc-shaped arch frames 2 and multiple through steel bars 3. Multiple arc-shaped arch frames 2 are set and spaced apart along the length of the tunnel. Each arc-shaped arch frame 2 is arch-shaped to fit the shape of the tunnel. The two ends of the arc-shaped arch frame 2 are used to support the ground of the tunnel.

[0043] Reference Figure 2 , Figure 3The number of the steel bars 3 is set to be multiple, the multiple steel bars 3 are arranged at intervals around the arc-shaped arch 2, and the two ends of each steel bar 3 are arranged to extend along the length direction of the tunnel. It should be noted that the steel bar 3 is welded by multiple steel bars, so that the length of the steel bar 3 is matched with the length of the tunnel.

[0044] With reference to Figure 2 , Figure 3 , Figure 4 In the embodiment, the arc-shaped arch 2 includes multiple unit prefabricated frames 4, and the arc-shaped arch 2 is formed by assembling the multiple unit prefabricated frames 4 to form the arc-shaped arch 2. The unit prefabricated frame 4 includes a fixed rod 42, a movable rod 43, and a first abutting rod 44. The number of the fixed rods 42 is set to be two, the two fixed rods 42 are arranged at intervals, and the axial directions of the two fixed rods 42 are parallel to each other. A plurality of connecting strips 45 are arranged between the two fixed rods 42, and the two ends of each connecting strip 45 are welded to the peripheral walls of the two fixed rods 42, and the two fixed rods 42 are connected into one body through the connecting strips 45.

[0045] With reference to Figure 4 , Figure 5 , Figure 6 The number of the movable rods 43 is set to be two, and the two movable rods 43 are arranged correspondingly to the two fixed rods 42. The two movable rods 43 are arranged at intervals, and the axial directions of the two movable rods 43 are parallel to the axial directions of the fixed rods 42. A second rotating rod 48 is arranged between each movable rod 43 and the corresponding fixed rod 42. One end of the second rotating rod 48 is hinged to the movable rod 43, and the other end is hinged to the corresponding fixed rod 42. The movable rod 43 and the corresponding fixed rod 42 are hinged to each other through the second rotating rod 48.

[0046] With reference to Figure 4 , Figure 5 , Figure 6 The two fixed rods 42 and the two movable rods 43 are combined to form a mounting area 46. The two fixed rods 42 and the two movable rods 43 are respectively located at the four corners of the mounting area 46. The first abutting rod 44 is arranged in the mounting area 46, and the axial direction of the first abutting rod 44 is parallel to the axial direction of the fixed rod 42. A first rotating rod 47 is arranged between each movable rod 43 and the first abutting rod 44. One end of the first rotating rod 47 is hinged to the first abutting rod 44, and the other end is hinged to the corresponding movable rod 43. Each movable rod 43 and the first abutting rod 44 are hinged to each other through the first rotating rod 47.

[0047] With reference to Figure 4 , Figure 5 , Figure 6In this embodiment, the first abutting rod 44 and the two fixed rods 42, and the first abutting rod 44 and the two movable rods 43 are spaced apart and form through channels 41 respectively. The through channels 41 are used for the through reinforcing bars 3 to be passed through. There are multiple first rotating rods 47 and multiple second rotating rods 48. All the first rotating rods 47 and all the second rotating rods 48 are arranged at intervals along the axial direction of the fixed rods 42. The multiple second rotating rods 48 divide the through channels 41 to form multiple through areas 411, so that each unit prefabrication frame 4 can be used for multiple through reinforcing bars 3 to be passed through.

[0048] Reference Figure 5 , Figure 6 In this embodiment, the second rotating rod 48 is connected to the second abutting rod 49. The axial direction of the second abutting rod 49 is parallel to the axial direction of the fixed rod 42. The second abutting rod 49 is connected in series with multiple second rotating rods 48 between the movable rod 43 and the fixed rod 42 so that all the second rotating rods 48 are connected as a whole. The first abutting rod 44 is used to clamp the through-steel 3 together with the movable rod 43. The second abutting rod 49 is used to clamp the through-steel 3 together with the fixed rod 42. When the first abutting rod 44 moves towards the side closer to the movable rod 43, the two movable rods 43 separate from each other and drive the second abutting rod 49 towards the side closer to the fixed rod 42 through the second rotating rod 48 so that the first abutting rod 44 and the second abutting rod 49 are clamped to different through-steel 3 respectively.

[0049] Reference Figure 5 , Figure 6 An adjustment hole 451 is provided on the side wall of the connecting bar 45 near the first abutting rod 44. The adjustment hole 451 is a through hole that passes through the connecting bar 45. A clamping member is installed in the adjustment hole 451. The clamping member is used to drive the first abutting rod 44 to move towards the side closer to the movable rod 43. In this embodiment, the clamping member is set as a clamping screw 452. One end of the clamping screw 452 passes through the adjustment hole 451 and abuts against the peripheral wall of the first abutting rod 44. The clamping screw 452 and the adjustment hole 451 are threaded together. The other end of the clamping screw 452 is fixedly connected to a connector. The connector is used to connect to an electric drill bit to drive the clamping bolt to rotate. It should be noted that the fixed rod 42, movable rod 43, first abutting rod 44 and second abutting rod 49 in this application are all made of steel bars.

[0050] Reference Figure 3 , Figure 7 A connector is installed between two adjacent prefabricated unit frames 4, and the two adjacent prefabricated unit frames 4 are connected to each other through the connector. It should be noted that in this application, the number of connectors between two adjacent prefabricated unit frames 4 is set to multiple. Specifically, the number of connectors is set to four, that is, two movable rods 43 and two fixed rods 42 correspond to four connectors respectively.

[0051] ReferenceFigure 3 、 Figure 7 In the embodiment, the connecting piece includes two plug-in heads 5, the two plug-in heads 5 are hinged to each other, and the end faces of the two plug-in heads 5 away from each other are provided with plug-in grooves 51 for inserting the fixed rods 42 or the movable rods 43; the inner diameter of the plug-in groove 51 is greater than the outer diameter of the fixed rod 42 or the outer diameter of the movable rod 43, and a plurality of elastic sheets 52 are fixedly installed in the plug-in groove 51 of each plug-in head 5, all the elastic sheets 52 are arranged in the axial direction of the fixed rod 42 or the axial direction of the movable rod 43, when the fixed rod 42 or the movable rod 43 is inserted into the plug-in groove 51, the elastic sheets 52 are deformed towards the side close to the bottom wall of the plug-in groove 51 and abut against the peripheral wall of the fixed rod 42 or the peripheral wall of the movable rod 43, and the fixed rod 42 or the movable rod 43 is limited in the plug-in groove 51 of the plug-in head 5 by the elastic sheets 52.

[0052] Referring to Figure 3 、 Figure 7 The peripheral wall of the plug-in head 5 is provided with a plurality of communication grooves 53, all the communication grooves 53 are arranged in the axial direction of the plug-in head 5, each communication groove 53 is communicated with the plug-in groove 51, and the communication groove 53 is used for entering the concrete into the plug-in groove 51.

[0053] Referring to Figure 2 、 Figure 3 、 Figure 7 In the embodiment, a limiting column 54 is installed between the two plug-in heads 5, one end of the limiting column 54 is fixedly connected to one of the plug-in heads 5, and the other end extends towards the other plug-in head 5, the limiting column 54 is used for limiting the maximum turning angle of the two plug-in heads 5, when the limiting column 54 abuts against the other plug-in head 5, the turning angle between the two plug-in heads 5 is between 5 degrees and 12 degrees, and in the embodiment, the maximum turning angle between the two plug-in heads 5 is 7 degrees; it should be noted that when the two ends of the arc-shaped arch support 2 are supported on the bottom wall of the tunnel, a plurality of anchor rods (not shown in the figure) need to be inserted into the bottom wall of the tunnel, and the fixed rods 42 in the unit prefabricated frame 4 at the two ends of the arc-shaped arch support 2 are used for being welded and fixed with the anchor rods.

[0054] The implementation principle of the embodiment 1 of the application is as follows: when the reinforcement cage is built, a plurality of unit prefabricated frames 4 are sequentially spliced through the connecting pieces to form the arc-shaped arch frame 2, then the through steel bars 3 are threaded through the through channels 41, after the threading of the through steel bars 3 is completed, the tool is used to drive the abutting screw 452 to rotate, so as to drive the first abutting rod 44 to move towards the side close to the movable rod 43, in the moving process of the first abutting rod 44, the first abutting rod 44 forces the two movable rods 43 to swing, so that the second abutting rod 49 swings towards the side close to the fixed rod 42 under the action of the second rotating rod 48, so that the first abutting rod 44 and the movable rod 43 and the second abutting rod 49 and the fixed rod 42 can be clamped on different through steel bars 3 respectively, so that the through steel bars 3 and the arc-shaped arch frame 2 form a whole, without manual binding of the cross nodes of the steel bars, simultaneously driving the first abutting rod 44 to move can clamp the unit prefabricated frame 4 on a plurality of through steel bars 3, thereby greatly improving the building efficiency of the reinforcement cage.

[0055] Embodiment 2

[0056] The application further discloses a construction method of a shallow-buried bias tunnel supporting structure.

[0057] The construction method of the shallow-buried bias tunnel supporting structure specifically comprises the following steps.

[0058] S1, tunnel excavation.

[0059] S2, installation of the arc-shaped arch frame 2: a, a plurality of anchor rods are vertically inserted along the two sides of the tunnel bottom wall; b, a plurality of unit prefabricated frames 4 are sequentially spliced through the connecting pieces to form the arc-shaped arch frame 2, and the two ends of the arc-shaped arch frame 2 are welded and fixed with the anchor rods, so that the two ends of the arc-shaped arch frame 2 are supported on the bottom surface of the tunnel through anchoring; c, the step b is repeated, and a plurality of arc-shaped arch frames 2 are sequentially installed along the length direction of the tunnel.

[0060] S3, installation of the through steel bars 3: a, a plurality of through steel bars 3 are sequentially threaded through the through channels 41 of the arc-shaped arch frame 2; b, the abutting screw 452 is rotated by using the electric drill tool, so that the first abutting rod 44 and the second abutting rod 49 are respectively abutted on the through steel bars 3 in different through channels 41 in the unit prefabricated frame 4, so that the through steel bars 3 and the arc-shaped arch frame 2 are connected into a whole, and the reinforcement cage which is adapted to the shape of the inner wall of the tunnel is formed.

[0061] S4, installation of the lining plate, the lining plate (not shown in the figure) is built along the inner side of the arc-shaped arch frame 2, so as to form a supporting area for pouring concrete.

[0062] S5, filling of the concrete, the concrete is pumped into the supporting area, and the concrete needs to be vibrated during the period, so that the concrete is filled in the supporting area, and after the concrete is solidified, the reinforced concrete layer which supports the inner wall of the tunnel is formed between the concrete and the reinforcement cage.

[0063] S6, dismounting of the lining plate.

[0064] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A shallow-burdened bias tunnel support structure, characterized by: The utility model provides a tunnel construction method and a tunnel construction device, and the tunnel construction method comprises the following steps: arranging a plurality of arc-shaped arches (2) in a tunnel, the arc-shaped arches (2) being in an arch shape and the two ends of the arc-shaped arches (2) being used for supporting the ground of the tunnel; arranging a plurality of penetrating steel bars (3) in the arc-shaped arches (2); and pouring concrete (1) in the tunnel to form a concrete layer (1) and a reinforcing cage, the reinforcing cage being formed by the arc-shaped arches (2) and the penetrating steel bars (3).When the first abutting rod (44) moves towards the side close to the movable rod (43), the second rotating rod (48) drives the second abutting rod (49) to move towards the side close to the fixed rod (42) for abutting to the steel bar (3).

2. A shallow-burdened bias tunnel support structure according to claim 1, characterized by: The connecting piece comprises two hinged plug-in joints (5) which are provided with plug-in grooves (51) for inserting a fixed rod (42) or a movable rod (43).

3. A shallow-burdened tunnel support structure according to claim 2, characterized in that: The inner diameter of the plug-in groove (51) is greater than the outer diameter of the fixed rod (42) or the outer diameter of the movable rod (43), and the plug-in groove (51) is provided with a plurality of elastic sheets (52) which are arranged along the axial direction of the fixed rod (42) or the axial direction of the movable rod (43), and the elastic sheets (52) are deformed and abut against the peripheral wall of the fixed rod (42) or the peripheral wall of the movable rod (43) when the fixed rod (42) or the movable rod (43) is inserted into the plug-in groove (51).

4. A shallow-burdened bias tunnel support structure according to claim 2, characterized by: The peripheral wall of the plug-in joint (5) is provided with a plurality of communication grooves (53) which are in communication with the plug-in groove (51) and are used for allowing the concrete to enter the plug-in groove (51).

5. A shallow-burdened tunnel support structure according to claim 1, characterized by: The connecting strip (45) is provided with an adjusting hole (451) which penetrates the connecting strip (45) near the side wall of the first abutting rod (44), the abutting member comprises an abutting screw (452), one end of the abutting screw (452) is inserted into the adjusting hole (451) and abuts against the peripheral wall of the first abutting rod (44), and the abutting screw (452) is in threaded connection with the adjusting hole (451).

6. A construction method of a shallow-buried bias tunnel supporting structure, based on the shallow-buried bias tunnel supporting structure according to any one of claims 1-5, comprising the following steps: S1, tunnel excavation; S2, installation of the arc-shaped arch frame (2), a plurality of arc-shaped arch frames (2) are installed along the length direction of the tunnel; S3, installation of the penetrating steel bars (3), the penetrating steel bars (3) are penetrated into the corresponding penetrating channels (41) and are abutted against the penetrating steel bars (3) by the abutting member; S4, installation of the lining plate, the lining plate is built along the inner side of the arc-shaped arch frame (2) to form a supporting area for pouring concrete; S5, filling of the concrete, the concrete is pumped into the supporting area to form a reinforced concrete layer which is supported on the inner wall of the tunnel; S6, disassembly of the lining plate.

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