Shallow-buried subway tunnel temporary support adapting to compaction of road above and construction method

Abstract

The invention relates to the technical field of tunnel construction, in particular to a shallow-buried subway tunnel temporary support adapting to compaction of an upper road and a construction method.The shallow-buried subway tunnel temporary support comprises two longitudinal supporting columns, a transverse supporting beam, two supporting assemblies, a supporting foundation plate and a steel formwork, and the supporting foundation plate can be supported through the two supporting assemblies; the supporting foundation plate provides installation conditions for the steel formwork, in the using process, the two longitudinal supporting columns are machined and adjusted to the preset height, the transverse supporting beam is installed on the two longitudinal supporting columns, the two supporting assemblies are unfolded, the supporting foundation plate is installed on the two supporting assemblies and the transverse supporting beam, and the steel formwork is installed on the supporting foundation plate. And the assembled device is installed at a preset position, grouting reinforcement is conducted, and then the tunnel can be temporarily supported, so that the problem that the tunnel is prone to deformation in the construction process of the shallow-buried subway tunnel is solved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a temporary support and construction method for a shallow buried subway tunnel adapted to the compaction of an upper road. Background Art

[0002] Tunnels are engineering structures buried in the ground and are a form of human use of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, and mining tunnels. For shallow subway tunnels that pass under roads, tunnel excavation will cause road pavement settlement. During road construction, when the roller is working, its compaction load will cause the tunnel to deform more.

[0003] For safety reasons, it is often forbidden to construct roads and tunnels simultaneously, which not only makes it difficult to ensure the quality of the previous construction project, but also greatly increases the construction period. Therefore, it is necessary to design a temporary support to control the deformation of the tunnel under the roller during construction. Summary of the invention

[0004] The purpose of the present invention is to provide a temporary support and construction method for a shallow buried subway tunnel that is adapted to the compaction of the upper road, aiming to solve the problem that the shallow buried subway tunnel is prone to deformation during the construction process.

[0005] To achieve the above-mentioned object, in a first aspect, the present invention provides a temporary support for a shallow buried subway tunnel adapted to the compaction of an upper road, comprising two longitudinal support columns, a transverse support beam, two support assemblies, a support base plate and a steel formwork;

[0006] The transverse support beam is installed on the two longitudinal support columns, the two support assemblies are respectively installed on the side of the transverse support beam away from the longitudinal support columns, the support base plate is installed on the transverse support beam and the two support assemblies, and the steel formwork is installed on one side of the support base plate.

[0007] Among them, the longitudinal support column includes an outer tube, a first adjustment buckle, a middle tube, a second adjustment buckle and an upper tube, the first adjustment buckle is installed on the outer tube, the middle tube is slidably connected to the outer tube and is located on one side of the outer tube, the second adjustment buckle is installed on the middle tube, the upper tube is slidably connected to the middle tube and is located on one side of the middle tube.

[0008] Among them, the first adjustment buckle includes a pressing plate, a movable frame, a fixed head and a return spring 1, the pressing plate is slidably connected to the outer cylinder and passes through the outer cylinder, the movable frame is fixedly connected to the pressing plate, slidably connected to the outer cylinder, and is located in the outer cylinder, the fixed head is fixedly connected to the movable frame and is located on one side of the movable frame, and the return spring 1 is fixedly connected to the movable frame, fixedly connected to the movable frame, and is located between the movable frame and the outer cylinder.

[0009] Among them, the transverse support beam includes a crossbeam, two clamping buckles and two cylinders. The crossbeam is installed on one side of the two upper cylinders. The two clamping buckles are installed on the side of the crossbeam close to the upper cylinders. The two cylinders are respectively fixedly connected to the crossbeam and respectively clamped with the supporting base plate.

[0010] Among them, the clamping buckle includes two fitting blocks, two return springs 2 and two pull rods. The two fitting blocks are respectively slidably connected to the cross beam and are both located on the side of the cross beam close to the upper tube. The two return springs 2 are respectively fixedly connected to the two fitting blocks and are respectively fixedly connected to the cross beam and are both located between the cross beam and the fitting blocks. The two pull rods are respectively slidably connected to the cross beam and are respectively fixedly connected to the two fitting blocks and both pass through the cross beam.

[0011] Among them, the supporting assembly includes a pillar, a first rotating head, a second rotating head and a second cylinder, the first rotating head is rotatably connected to the cross beam and is located on the cross beam, the second rotating head is rotatably connected to the supporting base plate and is located on one side of the supporting base plate, the pillar is fixedly connected to the first rotating head and the second rotating head and is located between the first rotating head and the second rotating head, the second cylinder is rotatably connected to the cross beam and rotatably connected to the supporting base plate, and is located between the cross beam and the supporting base plate.

[0012] In a second aspect, a construction method for temporary support of a shallow buried subway tunnel adapted to the compaction of an upper road is provided, which is used for the temporary support of a shallow buried subway tunnel adapted to the compaction of an upper road as described in the first aspect, and is characterized in that it comprises the following steps:

[0013] Assembling two longitudinal support columns, a transverse support beam, two support assemblies, a support base plate and a steel formwork to obtain a temporary support device;

[0014] The temporary support device is erected at the tunnel.

[0015] The present invention provides a temporary support for a shallow-buried subway tunnel that adapts to the compaction of the road above. The two longitudinal support columns provide installation conditions for the transverse support beams. The transverse support beams provide installation conditions for the two support assemblies. The support base plate can be supported by the two support assemblies. The support base plate provides installation conditions for the steel formwork. The longitudinal support columns are made of high-strength steel and are evenly arranged along the tunnel axis to provide the main longitudinal support force. The transverse support beams are fixed on the longitudinal support columns to form a support frame in the horizontal direction. Adjustable cylinders are installed at both ends to cope with deformation requirements at different positions. The support base plate is arranged at the top of the support column to disperse the pressure to ensure the stability of the supporting structure; the steel formwork is assembled from a plurality of steel formwork components of different specifications to form a closed structure similar to a tortoise shell, which fits tightly to the initial support surface to improve the support efficiency and sealing performance; when in use, the two longitudinal support columns are processed and adjusted to a preset height, the transverse support beam is installed on the two longitudinal support columns, and the two support components are unfolded, the support base plate is installed on the two support components and the transverse support beam, the steel formwork is installed on the support base plate, the assembled device is installed to a preset position, and grouting reinforcement is performed to temporarily support the tunnel, thereby solving the problem that shallow buried subway tunnels are prone to deformation during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a temporary support for a shallow buried subway tunnel adapted to the compaction of the upper road provided by the present invention.

[0018] Figure 2 It is a cross-sectional view of a temporary support for a shallow buried subway tunnel adapted to the compaction of the road above, provided by the present invention.

[0019] Figure 3 It is a front view of a temporary support for a shallow-buried subway tunnel adapted to the compaction of an upper road provided by the present invention.

[0020] Figure 4 yes Figure 3 Detail A is an enlarged view.

[0021] Figure 5 The invention provides a temporary support construction method for a shallow buried subway tunnel which is adapted to the compaction of the upper road.

[0022] 1-longitudinal support column, 2-transverse support beam, 3-support assembly, 4-support base plate, 5-steel formwork, 6-outer cylinder, 7-first adjustment buckle, 8-middle cylinder, 9-second adjustment buckle, 10-upper cylinder, 11-pressing plate, 12-movable frame, 13-fixed head, 14-reset spring 1, 15-cross beam, 16-clamping buckle, 17-oil cylinder 1, 18-fitting block, 19-reset spring 2, 20-pull rod, 21-pillar, 22-first rotating head, 23-second rotating head, 24-oil cylinder 2, 25-installation sleeve, 26-anti-slip particles. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] See also Figures 1 to 4 , In a first aspect, the present invention provides a temporary support for a shallow buried subway tunnel adapted to the compaction of an upper road, comprising two longitudinal support columns 1, a transverse support beam 2, two support assemblies 3, a support base plate 4 and a steel formwork 5;

[0025] The transverse support beam 2 is installed on the two longitudinal support columns 1, the two support assemblies 3 are respectively installed on the side of the transverse support beam 2 away from the longitudinal support column 1, the support base plate 4 is installed on the transverse support beam 2 and the two support assemblies 3, and the steel formwork 5 is installed on one side of the support base plate 4.

[0026] In this embodiment, the longitudinal support column 1 can be a servo system structure, including a main body, a telescopic part, a driving mechanism and a control element. First, the instructions from the host computer or the control terminal are received (the instructions include the length, speed, acceleration and other parameters of the telescopic part). The controller processes the received instructions, calculates the torque, speed and other parameters that the servo motor needs to output, and generates corresponding control signals. The servo motor operates according to the control signal, drives the transmission mechanism through the reducer, and thus drives the telescopic part to perform telescopic movement. During the telescopic process, the encoder detects the displacement or speed of the telescopic part in real time, and sends a feedback signal to the controller. The controller adjusts the servo motor in real time according to the feedback signal of the encoder to ensure the accuracy and stability of the telescopic movement. At the same time, the sensor may also detect the external environment or the state of the column in real time, and feed back this information to the controller for more precise control; when the telescopic part reaches the specified position or completes the specified action, the servo system stops moving. The longitudinal support column 1 is made of high-strength steel and is evenly arranged along the axis of the tunnel to provide the main longitudinal support force; the transverse support beam 2 is fixed on the longitudinal support column 1 to form a horizontal support frame, and adjustable cylinders are installed at both ends to cope with the deformation requirements of different positions; the support base plate 4 is arranged at the top of the support column to disperse the pressure and ensure the stability of the support structure; the steel formwork 5 is assembled from a plurality of steel formwork 5 components of different specifications to form a closed structure similar to a tortoise shell, which fits tightly to the initial support surface to improve the support efficiency and sealing. The two longitudinal support columns 1 provide installation conditions for the transverse support beam 2, and the transverse support beam 2 provides two support components 3 Installation conditions: The support base plate 4 can be supported by the two support components 3, and the support base plate 4 provides installation conditions for the steel formwork 5. When in use, the two longitudinal support columns 1 are processed and adjusted to a preset height, the transverse support beam 2 is installed on the two longitudinal support columns 1, and the two support components 3 are unfolded, the support base plate 4 is installed on the two support components 3 and the transverse support beam 2, and the steel formwork 5 is installed on the support base plate 4. The assembled device is installed to a preset position and grouting reinforcement is performed to temporarily support the tunnel, thereby solving the problem that shallow buried subway tunnels are prone to deformation during construction.

[0027] Furthermore, the longitudinal support column 1 includes an outer tube 6, a first adjustment buckle 7, a middle tube 8, a second adjustment buckle 9 and an upper tube 10, the first adjustment buckle 7 is installed on the outer tube 6, the middle tube 8 is slidably connected to the outer tube 6 and is located on one side of the outer tube 6, the second adjustment buckle 9 is installed on the middle tube 8, the upper tube 10 is slidably connected to the middle tube 8 and is located on one side of the middle tube 8.

[0028] In this embodiment, the first adjustment buckle 7 and the second adjustment buckle 9 have the same structure, the outer tube 6 provides installation conditions for the first adjustment buckle 7 and the middle tube 8, and the middle tube 8 provides installation conditions for the second adjustment buckle 9 and the upper tube 10. The middle tube 8 can be limited by the first adjustment buckle 7, the upper tube 10 can be limited by the second adjustment buckle 9, and the cross beam 15 can be connected through the upper tube 10.

[0029] Furthermore, the first adjustment buckle 7 includes a pressing plate 11, a movable frame 12, a fixed head 13 and a return spring 14, the pressing plate 11 is slidably connected to the outer cylinder 6 and passes through the outer cylinder 6, the movable frame 12 is fixedly connected to the pressing plate 11, and is slidably connected to the outer cylinder 6, and is located inside the outer cylinder 6, the fixed head 13 is fixedly connected to the movable frame 12, and is located on one side of the movable frame 12, the return spring 14 is fixedly connected to the movable frame 12, and is fixedly connected to the movable frame 12, and is located between the movable frame 12 and the outer cylinder 6.

[0030] In this embodiment, pressing the pressing plate 11 can drive the moving frame 12 to move, and the movement of the moving frame 12 can drive the fixed head 13 to move to the side away from the middle tube 8. The middle tube 8 has a plurality of fixing holes, and the fixed head 13 cooperates with the corresponding fixing holes to limit and fix the middle tube 8. The moving frame 12 can be reset by the rebound force of the reset spring 14.

[0031] Furthermore, the transverse support beam 2 includes a cross beam 15, two clamping buckles 16 and two oil cylinders 17. The cross beam 15 is installed on one side of the two upper tubes 10. The two clamping buckles 16 are installed on one side of the cross beam 15 close to the upper tubes 10. The two oil cylinders 17 are respectively fixedly connected to the cross beam 15 and are respectively clamped to the supporting base plate 4.

[0032] In this embodiment, the cross beam 15 provides installation conditions for the two clamping buckles 16. The two clamping buckles 16 can be used to fix and disassemble the cross beam 15 and the upper cylinder 10, and the two cylinders 17 can be used to connect the supporting base plate 4 and the cross beam 15.

[0033] Furthermore, the clamping buckle 16 includes two fitting blocks 18, two return springs 19 and two pull rods 20. The two fitting blocks 18 are respectively slidably connected to the cross beam 15 and are both located on the side of the cross beam 15 close to the upper tube 10. The two return springs 19 are respectively fixedly connected to the two fitting blocks 18 and are respectively fixedly connected to the cross beam 15 and are both located between the cross beam 15 and the fitting blocks 18. The two pull rods 20 are respectively slidably connected to the cross beam 15 and are respectively fixedly connected to the two fitting blocks 18 and both pass through the cross beam 15.

[0034] In this embodiment, the upper tube 10 has a fitting hole, and the two fitting blocks 18 cooperate with the corresponding fitting holes to clamp the upper tube 10. The rebound force of the two reset springs 19 can bounce the fitting blocks 18 into the corresponding fitting holes, and pulling the two pull rods 20 can drive the two fitting blocks 18 to move away from the fitting holes.

[0035] Furthermore, the support assembly 3 includes a pillar 21, a first rotating head 22, a second rotating head 23 and a second cylinder 24, the first rotating head 22 is rotatably connected to the beam 15 and is located on one side of the beam 15, the second rotating head 23 is rotatably connected to the support base plate 4 and is located on one side of the support base plate 4, the pillar 21 is fixedly connected to the first rotating head 22 and the second rotating head 23 and is located between the first rotating head 22 and the second rotating head 23, the second cylinder 24 is rotatably connected to the beam 15 and is rotatably connected to the support base plate 4 and is located between the beam 15 and the support base plate 4.

[0036] In this embodiment, the first rotating head 22 and the second rotating head 23 provide installation conditions for the support column 21 , and the extension and retraction of the oil cylinder 24 can drive the support column 21 to unfold.

[0037] Furthermore, the clamping buckle 16 also includes two mounting sleeves 25 and a plurality of anti-slip particles 26. The two mounting sleeves 25 are respectively fixedly connected to the two pull rods 20 and are respectively located around the two mounting sleeves 25. The plurality of anti-slip particles 26 are respectively fixedly connected to the two mounting sleeves 25 and are respectively located around the two mounting sleeves 25.

[0038] In this embodiment, the two mounting sleeves 25 provide mounting conditions for the plurality of anti-skid particles 26 , and the plurality of anti-skid particles 26 can increase the friction force when the pull rod 20 is pulled.

[0039] See also Figure 5In the second aspect, a construction method for temporary support of a shallow buried subway tunnel adapted to the compaction of the road above is used for the temporary support of a shallow buried subway tunnel adapted to the compaction of the road above as described in the first aspect, characterized in that it comprises the following steps:

[0040] S1 assembles two longitudinal support columns 1, a transverse support beam 2, two support assemblies 3, a support base plate 4 and a steel formwork 5 to obtain a temporary support device;

[0041] Specifically, the outer cylinder 6 is installed to a preset position, and the pressing plate 11 is pressed toward the side close to the outer cylinder 6, the pressing plate 11 drives the movable frame 12 to move toward the side close to the return spring 14, the movable frame 12 drives the fixed head 13 to move toward the side away from the middle cylinder 8, the middle cylinder 8 is pulled toward the side away from the outer cylinder 6, the middle cylinder 8 is adjusted to a preset position, and at the same time, the upper cylinder 10 is adjusted to a preset length through the second adjusting buckle 9, the upper cylinder 10 is inserted into the mounting hole on the cross beam 15, and the upper cylinder 10 is fixed by the two fitting blocks 18, the pillar 21 is expanded by the cylinder 2 24, and the support base plate 4 is installed on the pillar 21 and the cylinder 1 17, the steel formwork 5 is installed on the support base plate 4, and a temporary support device is obtained.

[0042] S2 sets up the temporary support device at the tunnel.

[0043] Specifically, the temporary support frame is erected at the support position in the tunnel, and grouting reinforcement is performed into the steel formwork 5 to cast the second lining.

[0044] Beneficial effects:

[0045] 1. Provide stable support and effectively prevent road subsidence: This temporary support device provides stable support for the tunnel when the roller is working through longitudinal support columns and transverse support beams made of high-strength steel, as well as adjustable cylinders and support components. It disperses the compaction load generated by the roller when it is working, effectively preventing the problem of increased deformation of the tunnel due to concentrated pressure.

[0046] 2. Adapt to different deformation requirements and improve support flexibility: Adjustable cylinders are installed at both ends of the transverse support beam in the device, which can be flexibly adjusted according to the deformation requirements of different positions. This design enables the support structure to better adapt to various complex situations during tunnel excavation, further enhances the stability and reliability of the support, and thus reduces the risk of road subsidence.

[0047] 3. Closely fit the initial support surface to improve support efficiency and sealing: The steel formwork is assembled from multiple steel formwork components of different specifications to form a closed structure similar to a tortoise shell, which closely fits the initial support surface. This design not only improves the support efficiency and sealing, but also effectively prevents slurry leakage during the grouting process, ensuring the quality of grouting reinforcement. At the same time, the tightly fitting support structure can also better transmit pressure, further reducing the possibility of road settlement.

[0048] 4. The construction method is simple and efficient, and easy to promote and apply: This temporary support construction method is simple and efficient. At the same time, the steel formwork can repeatedly reduce the construction cost. This method not only reduces the construction difficulty and cost, but also improves the construction efficiency and quality. At the same time, the device has a simple structure, is easy to manufacture and transport, and is easy to promote and apply in actual projects, providing an effective solution to the problem of road subsidence caused by the excavation of shallow buried subway tunnels under the road.

[0049] What is disclosed above is only a preferred embodiment of the temporary support and construction method of a shallow buried subway tunnel adapted to the compaction of the upper road of the present invention. Of course, this cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A temporary support for a shallow buried subway tunnel adapted to the compaction of the road above, characterized in that: It includes two longitudinal support columns, transverse support beams, two support assemblies, support base plates and steel formwork; The transverse support beam is installed on the two longitudinal support columns, the two support assemblies are respectively installed on the side of the transverse support beam away from the longitudinal support columns, the support base plate is installed on the transverse support beam and the two support assemblies, and the steel formwork is installed on one side of the support base plate.

2. The temporary support for shallow buried subway tunnels adapted to the compaction of the road above as claimed in claim 1, characterized in that: The longitudinal support column includes an outer tube, a first adjustment buckle, a middle tube, a second adjustment buckle and an upper tube, the first adjustment buckle is installed on the outer tube, the middle tube is slidably connected to the outer tube and is located on one side of the outer tube, the second adjustment buckle is installed on the middle tube, the upper tube is slidably connected to the middle tube and is located on one side of the middle tube.

3. The temporary support for shallow buried subway tunnels adapted to the compaction of the upper road as claimed in claim 2, characterized in that: The first adjusting buckle includes a pressing plate, a movable frame, a fixed head and a return spring 1. The pressing plate is slidably connected to the outer cylinder and passes through the outer cylinder. The movable frame is fixedly connected to the pressing plate and slidably connected to the outer cylinder and is located in the outer cylinder. The fixed head is fixedly connected to the movable frame and is located on one side of the movable frame. The return spring 1 is fixedly connected to the movable frame and is fixedly connected to the movable frame and is located between the movable frame and the outer cylinder.

4. The temporary support for shallow buried subway tunnels adapted to the compaction of the upper road as claimed in claim 3, characterized in that: The transverse support beam includes a crossbeam, two clamping buckles and two oil cylinders. The crossbeam is installed on one side of the two upper tubes. The two clamping buckles are installed on one side of the crossbeam close to the upper tubes. The two oil cylinders are respectively fixedly connected to the crossbeam and are respectively clamped to the supporting base plate.

5. The temporary support for shallow buried subway tunnels adapted to the compaction of the upper road as claimed in claim 4, characterized in that: The clamping buckle includes two fitting blocks, two return springs and two pull rods. The two fitting blocks are respectively slidably connected to the cross beam and are both located on the side of the cross beam close to the upper tube. The two return springs are respectively fixedly connected to the two fitting blocks and are respectively fixedly connected to the cross beam and are both located between the cross beam and the fitting blocks. The two pull rods are respectively slidably connected to the cross beam and are respectively fixedly connected to the two fitting blocks and both pass through the cross beam.

6. The temporary support for shallow buried subway tunnels adapted to the compaction of the upper road as claimed in claim 5, characterized in that: The supporting assembly includes a pillar, a first rotating head, a second rotating head and a second oil cylinder. The first rotating head is rotatably connected to the cross beam and is located on the cross beam. The second rotating head is rotatably connected to the supporting base plate and is located on one side of the supporting base plate. The pillar is fixedly connected to the first rotating head and the second rotating head and is located between the first rotating head and the second rotating head. The second oil cylinder is rotatably connected to the cross beam and rotatably connected to the supporting base plate and is located between the cross beam and the supporting base plate.

7. A construction method for temporary support of a shallow buried subway tunnel adapted to the compaction of the road above, used for the temporary support of a shallow buried subway tunnel adapted to the compaction of the road above as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Assembling two longitudinal support columns, a transverse support beam, two support assemblies, a support base plate and a steel formwork to obtain a temporary support device; The temporary support device is erected at the tunnel.

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