An integrated steel truss apparatus for superimposed tunnel support and method of use thereof

Abstract

The application discloses a kind of integrated steel truss equipment for superimposed tunnel support, including support frame assembly and arch frame for superimposed tunnel support, support frame assembly includes steel block, four steel blocks form the outer frame of support frame assembly, arch frame includes support formwork and intermediate connecting frame, fixed installation between support frame assembly and arch frame, the application further discloses a kind of integrated steel truss equipment for superimposed tunnel support and its use method;The application is docked between upper and lower truss structure, cooperates between plug-in assembly and pulling assembly, while quickly realizing the stability of limiting fixation between upper and lower truss structure, it is convenient to disassemble and assemble between steel truss structure, avoid the component between steel truss main body needs to be cut to disassemble or a large number of staff need to be installed one by one by the aid of external tool through bolt, and structure is simple, easy to operate, it is favorable to the use of integrated steel truss equipment for superimposed tunnel support.

Description

Technical Field

[0001] This invention relates to the technical field of tunnel support equipment, specifically to an integrated steel truss equipment for superimposed tunnel support and its usage method. Background Technology

[0002] With the continuous development of urban underground space, underground engineering construction is increasingly constrained by the above-ground environment and underground structures. The cut-and-cover method, due to its relatively small impact on the surrounding environment and strong cross-sectional adaptability, has gained increasing application in engineering projects. The steel frame in the initial support system, as the main load-bearing component, directly determines the reliability and durability of the initial support structure. In the case of shallow-buried urban construction, a superimposed configuration of highway tunnels and power tunnels is used, with the highway tunnel as the upper main tunnel and the power tunnel as the lower tunnel, located directly beneath the highway tunnel.

[0003] The components of existing steel truss main bodies are mainly fixedly connected by welding. When superimposed tunnel support, the integrated steel truss structure is large. During use, due to the excessive complexity of the integrated steel truss structure, the components between the main bodies of the steel truss need to be cut for disassembly, which is inconvenient and cannot be reused. During the use and installation of some steel truss main bodies, a large number of workers are required to install them one by one with bolts using external tools, which is time-consuming and labor-intensive, and is not conducive to the use of integrated steel truss equipment for superimposed tunnel support. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated steel truss device for superimposed tunnel support and its usage method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated steel truss device for superimposed tunnel support, comprising a support frame assembly and an arch frame for superimposed tunnel support. The support frame assembly includes steel blocks, four steel blocks forming the outer frame of the support frame assembly. The arch frame includes a support template and an intermediate connecting frame. The support frame assembly and the arch frame are fixedly installed together. A truss diagonal bar is provided between two adjacent steel blocks, and the two truss diagonal bars are intersected. A connecting beam is provided between the opposite sides of the connection point of the two truss diagonal bars. The truss diagonal bars and the connecting beam form a truss reinforcement structure. A support seat is provided on the top of the steel blocks, and an adjustable plug-in assembly is provided on the support seat. A traction assembly for simultaneous operation and adjustment is provided on the connecting beam.

[0006] Preferably, the outer frame is provided in multiple sets, and the multiple sets of outer frames are arranged sequentially along the upward direction. The top of the support base is provided with a positioning frame groove and an anti-reverse mounting groove.

[0007] Preferably, the bottom of the steel bar block is provided with a support docking block, and the bottom of the support docking block is provided with a positioning block and an anti-reverse mounting block, the anti-reverse mounting block having a triangular block structure.

[0008] Preferably, the positioning block is matched with the positioning frame groove on the opposite set of steel bars, the anti-reverse mounting block is matched with the anti-reverse mounting groove on the opposite set of steel bars, and the side of the positioning block is provided with a slot.

[0009] Preferably, the plug-in assembly includes a sliding connecting rod, a receiving groove is provided on the inner side of the support base, an installation block is provided at the opening of the receiving groove, the sliding connecting rod is slidably plugged into the installation block, and the installation block is fixed to the support base by bolts.

[0010] Preferably, a limiting block is provided at the end of the sliding connecting rod. The limiting block has a "T" shaped structure and the end matches the slot. A support spring is provided on the sliding connecting rod between the limiting block and the mounting block. A connecting strip is provided between the other ends of the two sliding connecting rods.

[0011] Preferably, the traction assembly includes a mounting base, a fixing rod is provided on the top of the mounting base, a fixing block is provided on the top of the two fixing rods, and a transmission screw is provided between the fixing block and the mounting base.

[0012] Preferably, a movable block is sleeved on the transmission screw, and the movable block is connected to the transmission screw by internal and external threads. Pull rods are hinged to both sides of the movable block, and the ends of the pull rods are hinged to the middle inner side of the connecting strip.

[0013] A method for using an integrated steel truss device for superimposed tunnel support, the method comprising the following steps:

[0014] S1: First, four steel blocks are used to form the outer frame of the support frame assembly, and the truss reinforcement structure is formed between the truss diagonal bars and the connecting beams and placed on the ground;

[0015] S2: Start the motor to drive the transmission screw to rotate, which in turn causes the movable block to move downward along the axis of the transmission screw. The pull rod drives the connecting strip to move inward to the truss. The two connecting strips move closer to each other, so that the end of the limiting block is accommodated in the receiving groove.

[0016] S3: Then insert the positioning blocks on another set of outer frames into the positioning slots on the opposite set of steel blocks. The positioning between the anti-reverse mounting block and the anti-reverse mounting slot prevents the upper and lower trusses from being installed in reverse, thus achieving the positioning between the upper and lower trusses.

[0017] S4: Then start the motor to drive the transmission screw to reverse it, which in turn causes the movable block to move upward along the axis of the transmission screw. The pull rod pushes the connecting strips on both sides closer to the support seat, so that the end of the limit block is inserted into the corresponding slot, realizing the limit installation between the upper and lower trusses.

[0018] S5: Repeat the above steps to install multiple sets of upper and lower trusses as needed to form a support frame assembly. Finally, fix the support frame assembly and the arch frame together to achieve rapid installation of the integrated steel truss equipment for tunnel support.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention, through the cooperation between the positioning block and the positioning frame groove, and the cooperation between the anti-reverse mounting block and the anti-reverse mounting groove, forms the connection between the upper and lower truss structures, and the cooperation between the plug-in components and the tensioning components. At the same time, it quickly realizes the limiting fixation between the support docking blocks and the support seats of the four sets of steel blocks, forming the stability of the limiting fixation between the upper and lower truss structures. This facilitates the assembly and disassembly of the steel truss structures, avoiding the need to cut the components between the main body of the steel truss for disassembly or to have a large number of workers install them one by one with bolts using external tools. Moreover, the structure is simple and easy to operate, which is conducive to the use of integrated steel truss equipment for superimposed tunnel support.

[0021] 2. This invention forms a truss reinforcement structure between the truss diagonal braces and the connecting beams, ensuring the strength between the steel truss structures and facilitating the superimposed tunnel support effect. At the same time, the positioning blocks on the outer frame and the positioning slots on the steel strip blocks are positioned to prevent the upper and lower trusses from being installed in reverse, thus achieving the positioning between the upper and lower trusses.

[0022] 3. This invention features an adjustable plug-in assembly on the support base and a pull assembly on the connecting beam for simultaneous operation and adjustment. The rotation of the transmission screw causes the movable block to move upward along the axial direction of the transmission screw. The pull rods push the connecting strips on both sides closer to the support base, thereby allowing the end of the limiting block to be inserted into the corresponding slot, achieving limiting installation between the upper and lower trusses. At the same time, the installation operation can be performed at the four corners of the steel truss structure, which is convenient, fast, time-saving and labor-saving. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of the integrated steel truss device for superimposed tunnel support according to the present invention.

[0024] Figure 2 This is a schematic diagram of the support frame assembly of the present invention.

[0025] Figure 3 This is a cross-sectional view of the support base of the present invention.

[0026] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.

[0027] Figure 5 For the present invention Figure 3 Enlarged structural diagram at point B.

[0028] Figure 6 This is a schematic diagram of the bottom of the truss structure of the present invention.

[0029] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point C.

[0030] In the diagram: 1. Support frame assembly; 2. Arch frame; 21. Support template; 22. Intermediate connecting frame; 3. Steel strip block; 31. Support docking block; 32. Positioning block; 33. Anti-reverse mounting block; 34. Slot; 4. Truss diagonal brace; 5. Connecting beam; 6. Support seat; 61. Positioning frame groove; 62. Anti-reverse mounting groove; 7. Sliding connecting rod; 71. Mounting block; 72. Limiting block; 73. Support spring; 74. Connecting strip block; 8. Mounting seat; 81. Fixing rod; 82. Fixing block; 83. Transmission screw; 84. Movable block; 85. Pull rod. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 7 This invention provides a technical solution: an integrated steel truss device for superimposed tunnel support, comprising a support frame assembly 1 and an arch frame 2 for superimposed tunnel support. The support frame assembly 1 includes steel blocks 3, and four steel blocks 3 form the outer frame of the support frame assembly 1. Multiple sets of outer frames are provided, and the multiple sets of outer frames are arranged sequentially along the upward direction. The arch frame 2 includes a support template 21 and an intermediate connecting frame 22. The support frame assembly 1 and the arch frame 2 are fixedly installed together. In this embodiment, the support frame assembly 1 and the arch frame 2 can be fixedly connected by bolts to ensure the stability of the connection between the support frame assembly 1 and the arch frame 2.

[0033] A truss diagonal bar 4 is welded between two adjacent steel bars 3. The two truss diagonal bars 4 are intersected. A connecting beam 5 is welded between the opposite sides of the connection point of the two truss diagonal bars 4. The truss diagonal bar 4 and the connecting beam 5 form a truss reinforcement structure, which ensures the strength between the steel truss structures and is conducive to the superimposed tunnel support function.

[0034] A support base 6 is welded to the top of the steel block 3. The top of the support base 6 is provided with a positioning frame groove 61 and an anti-reverse mounting groove 62. A support docking block 31 is welded to the bottom of the steel block 3. A positioning block 32 and an anti-reverse mounting block 33 are welded to the bottom of the support docking block 31. The anti-reverse mounting block 33 has a triangular block structure. The positioning block 32 and the anti-reverse mounting block 33 are integrally formed.

[0035] The positioning block 32 is matched with the positioning frame groove 61 on the opposite set of steel strips 3, and the anti-reverse mounting block 33 is matched with the anti-reverse mounting groove 62 on the opposite set of steel strips 3. In this embodiment, the positioning block 32 on another set of outer frames is inserted into the positioning frame groove 61 on the opposite set of steel strips 3. The positioning between the anti-reverse mounting block 33 and the anti-reverse mounting groove 62 prevents the upper and lower trusses from being installed in reverse, and realizes the positioning between the upper and lower trusses.

[0036] The positioning block 32 has a slot 34 on its side. The support base 6 is equipped with an adjustable plug-in assembly, which includes a sliding connecting rod 7. The support base 6 has a receiving groove on its inner side. An installation block 71 is fixed at the opening of the receiving groove. The sliding connecting rod 7 is slidably inserted into the installation block 71. The installation block 71 is fixed to the support base 6 by bolts. The installation block 71 facilitates the installation of the plug-in assembly and increases the effectiveness of the device. A limit block 72 is welded to the end of the sliding connecting rod 7. The limit block 72 has a "T" shaped structure and its end matches the slot 34.

[0037] A support spring 73 is sleeved on the sliding connecting rod 7 between the limiting block 72 and the mounting block 71. A connecting strip 74 is welded between the other ends of the two sliding connecting rods 7. The elastic force of the support spring 73 is applied to the limiting block 72, so that the end of the limiting block 72 is inserted into the slot 34, which further enhances the stability of the limiting installation between the upper and lower trusses.

[0038] The connecting beam 5 is equipped with a traction assembly that facilitates simultaneous operation and adjustment. The traction assembly includes a mounting base 8, a fixing rod 81 welded to the top of the mounting base 8, and a fixing block 82 welded to the top of the two fixing rods 81. A transmission screw 83 is rotatably connected between the fixing block 82 and the mounting base 8 via a bearing. The transmission screw 83 is driven by a motor, which is fixedly mounted on the mounting base 8.

[0039] A movable block 84 is sleeved on the transmission screw 83. The movable block 84 and the transmission screw 83 are connected by internal and external threads. Pull rods 85 are hinged on both sides of the movable block 84. The ends of the pull rods 85 are hinged to the middle inner side of the connecting strip 74. In this embodiment, the starting motor drives the transmission screw 83 to rotate, which causes the movable block 84 to move downward along the axial direction of the transmission screw 83. The pull rods 85 drive the connecting strip 74 to move inward toward the truss. The two connecting strips 74 move closer to each other, so that the end of the limiting block 72 is accommodated in the receiving groove; otherwise, they move in the opposite direction.

[0040] In summary, the cooperation between the positioning block 32 and the positioning frame groove 61, along with the cooperation between the anti-reverse mounting block 33 and the anti-reverse mounting groove 62, forms a connection between the upper and lower truss structures and a cooperation between the plug-in components and the tensioning components. At the same time, it quickly achieves the limiting and fixing between the support docking block 31 and the support seat 6 of the four sets of steel strip blocks 3, forming the stability of the limiting and fixing between the upper and lower truss structures. This facilitates the assembly and disassembly of the steel truss structures, avoiding the need to cut the components between the main body of the steel truss for disassembly or to have a large number of workers install them one by one with bolts using external tools. Moreover, the structure is simple and easy to operate, which is conducive to the use of integrated steel truss equipment for superimposed tunnel support.

[0041] A method for using an integrated steel truss device for superimposed tunnel support, the method comprising the following steps:

[0042] S1: First, four steel blocks 3 form the outer frame of the support frame assembly 1, and together with the truss diagonal rod 4 and the connecting beam 5, they form a truss reinforcement structure and are placed on the ground;

[0043] S2: Start the motor to drive the transmission screw 83 to rotate, which in turn causes the movable block 84 to move downward along the axis of the transmission screw 83. The pull rod 85 drives the connecting strip 74 to move inward to the truss. The two connecting strips 74 move closer to each other, so that the end of the limiting block 72 is accommodated in the receiving groove.

[0044] S3: Then insert the positioning block 32 on another set of outer frames into the positioning frame groove 61 on the opposite set of steel strip blocks 3. The positioning between the anti-reverse mounting block 33 and the anti-reverse mounting groove 62 prevents the upper and lower trusses from being installed in reverse, and realizes the positioning between the upper and lower trusses.

[0045] S4: Then start the motor to drive the transmission screw 83 to reverse, thereby causing the movable block 84 to move upward along the axis of the transmission screw 83. The pull rod 85 pushes the connecting strips 74 on both sides closer to the support seat 6, so that the end of the limiting block 72 is inserted into the corresponding slot 34, realizing the limiting installation between the upper and lower trusses.

[0046] S5: Repeat the above steps to install multiple sets of upper and lower trusses as needed to form a support frame assembly. Finally, fix the support frame assembly 1 and the arch frame 2 together to achieve rapid installation of the integrated steel truss equipment for tunnel support.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated steel truss apparatus for superimposed tunnel support, comprising a support frame assembly (1) and an arch frame (2) for superimposed tunnel support, characterized by: The support frame assembly (1) comprises steel blocks (3), four steel blocks (3) form the outer frame of the support frame assembly (1), the arch frame (2) comprises a support template (21) and an intermediate connecting frame (22), the support frame assembly (1) and the arch frame (2) are fixedly installed, two adjacent steel blocks (3) are provided with truss inclined rods (4), two truss inclined rods (4) are cross arranged, the connecting portions of the two truss inclined rods (4) are provided with a connecting cross beam (5) between opposite sides, the truss inclined rods (4) and the connecting cross beam (5) form a truss reinforcing structure, the top of the steel block (3) is provided with a support seat (6), the outer frame is provided with a plurality of groups, the plurality of groups of outer frames are arranged and distributed in sequence along the upward direction, the top of the support seat (6) is respectively provided with a positioning frame slot (61) and an anti-reverse installation slot (62), the support seat (6) is provided with an insertion assembly convenient for adjusting, the insertion assembly comprises a sliding connecting rod (7), the inner side of the support seat (6) is provided with a containing groove, the opening of the containing groove is provided with a mounting block (71), the sliding connecting rod (7) is slidingly inserted on the mounting block (71), the mounting block (71) is fixed on the support seat (6) through bolts, the connecting cross beam (5) is provided with a pulling assembly convenient for simultaneously operating and adjusting the insertion assembly, the pulling assembly comprises a mounting seat (8), the top of the mounting seat (8) is provided with a fixed rod (81), the top of the two fixed rods (81) is provided with a fixed block (82), and the fixed block (82) and the mounting seat (8) are provided with a transmission screw rod (83).

2. An integrated steel truss apparatus for overlying tunnel support according to claim 1, characterized in that: The bottom of the steel block (3) is provided with a support butt joint block (31), the bottom of the support butt joint block (31) is respectively provided with a positioning block (32) and an anti-reverse installation block (33), and the anti-reverse installation block (33) is in a triangular block structure.

3. An integrated steel truss apparatus for overlying tunnel support according to claim 2, characterized in that: The positioning block (32) and the positioning frame slot (61) on the opposite group of steel blocks (3) are matched with each other, the anti-reverse installation block (33) and the anti-reverse installation slot (62) on the opposite group of steel blocks (3) are matched with each other, and the side surface of the positioning block (32) is provided with a slot (34).

4. The integrated steel truss apparatus for superimposed tunnel support according to claim 1, wherein: The end of the sliding connecting rod (7) is provided with a limiting block (72), the limiting block (72) is in a "T" type structure, and the end and the slot (34) are matched with each other, the sliding connecting rod (7) is provided with a supporting spring (73) between the limiting block (72) and the mounting block (71), and the other end of the two sliding connecting rods (7) is provided with a connecting strip block (74).

5. The integrated steel truss apparatus for superimposed tunnel support according to claim 1, wherein: The transmission screw rod (83) is sleeved with a movable block (84), the movable block (84) and the transmission screw rod (83) are connected in internal and external threads, both sides of the movable block (84) are hinged with a pulling rod (85), and the end of the pulling rod (85) is hinged to the middle inner side of the connecting strip block (74).

6. A method of using an integrated steel truss apparatus for overlying tunnel support, characterized by: The use method is applied to the integrated steel truss equipment for superimposed tunnel support in any one of claims 1-5, comprising the following steps: S1: first, four steel blocks (3) form the outer frame of the support frame assembly (1), and the truss reinforcing structure formed between the truss inclined rods (4) and the connecting cross beam (5) is placed on the ground; S2: start the motor drive transmission screw (83) to rotate, and then make the movable block (84) move downward along the axial direction of the transmission screw (83), the pull rod (85) drives the connecting strip block (74) to move inward along the truss, the two connecting strip blocks (74) are close to each other, and the end of the limiting block (72) is accommodated into the accommodating groove; S3: the positioning block (32) on the other group of outer frames is inserted into the positioning frame groove (61) on the opposite group of steel strip blocks (3), the anti-reverse block (33) is positioned between the anti-reverse groove (62), the upper and lower trusses are prevented from being installed reversely, and the positioning between the upper and lower trusses is realized; S4: then start the motor drive transmission screw (83) to make it reverse, and then make the movable block (84) move upward along the axial direction of the transmission screw (83), the pull rod (85) pushes the two connecting strip blocks (74) on the two sides to be close to the support seat (6), the end of the limiting block (72) is inserted into the corresponding insertion groove (34), the limiting installation between the upper and lower trusses is realized; S5: repeat the operation according to the above steps, install multiple groups of upper and lower trusses according to the needs, and then form a support frame assembly, finally, the support frame assembly (1) and the arch frame (2) are fixedly installed, and the installation of the integrated steel truss equipment for tunnel support is realized.

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