Tunnel support construction device suitable for various surrounding rock conditions

Abstract

The application provides a tunnel support construction device suitable for various surrounding rock conditions, and is used for solving the problems that the arc-shaped I-beam is difficult to assemble and has low efficiency in the process of installing the tunnel steel arch. The tunnel support comprises a steel arch, the steel arch comprises a plurality of arc-shaped I-beams connected in sequence, and the adjacent two arc-shaped I-beams are connected through a clamping connection assembly. The clamping connection assembly comprises two clamping mechanisms hinged to each other, and the two clamping mechanisms are clamped at the adjacent ends of the two arc-shaped I-beams, respectively. The support construction device further comprises a vehicle body, and a jacking installation assembly for clamping and jacking the steel arch and spreading the plurality of arc-shaped I-beams is installed on the vehicle body. In the application, the plurality of arc-shaped I-beams are sequentially connected through the clamping connection assembly outside the tunnel. When installing, the steel arch is jacked to a predetermined position through the jacking installation assembly. The assembly and alignment of the arc-shaped I-beams do not need to be performed in the tunnel during the installation process, and the installation efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of tunnel construction, and in particular relates to a tunnel support construction device suitable for various surrounding rock conditions. Background Technology

[0002] During tunnel excavation, different excavation methods are adopted depending on the grade of the surrounding rock, such as full-face development, two-stage excavation, and three-stage excavation. After each section is excavated, support is installed on the tunnel wall and shotcrete is used to fix it to support the tunnel wall. The construction of tunnel support mainly includes the installation of steel arch frames, steel mesh and anchor bolts.

[0003] The existing installation of tunnel steel arch frames involves transporting several curved I-beams to the tunnel working face using transport vehicles, then lifting the curved I-beams using trolleys or hoisting equipment and aligning and assembling them with manual assistance, followed by manual installation of screws and welding. During construction, there are problems such as difficulty and low efficiency in aligning and assembling the curved I-beams, as well as high labor intensity. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a tunnel support construction device suitable for various surrounding rock conditions, which solves the problem of high difficulty and low efficiency in assembling curved I-beams during the installation of tunnel steel arch frames in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides a tunnel support construction device applicable to various surrounding rock conditions. The tunnel support includes a steel arch frame, which includes a plurality of arc-shaped I-beams connected in sequence. The device is characterized in that adjacent arc-shaped I-beams are connected by a clamping connection assembly, which includes two clamping mechanisms that are hinged to each other and clamp the adjacent ends of the two arc-shaped I-beams respectively.

[0006] The support construction device also includes a vehicle body, on which a lifting installation assembly is installed for clamping and lifting the steel arch frame and spreading out several curved I-beams.

[0007] As an optional solution, the clamping mechanism includes a first mounting box, a first U-shaped positioning groove, a rack, a push plate, and a drive screw;

[0008] The two first mounting boxes of the adjacent clamping mechanism are hinged to each other. The upper end of the first mounting box is open. The top of the side walls at both ends of the first mounting box is provided with a first U-shaped positioning groove. The clamping mechanism is provided with clamping modules on both sides for clamping the two sides of the arc-shaped I-beam.

[0009] The drive screw is threaded to the bottom end face of the first mounting box. One end of the drive screw located inside the first mounting box is rotatably mounted on the bottom end face of the push plate through a bearing. Both ends of the upper end face of the push plate are equipped with racks. The racks mesh with the clamping modules on both sides to drive the clamping modules to clamp the arc-shaped I-beam.

[0010] As an optional solution, the clamping module includes an L-shaped clamping plate, a first mounting plate, a connecting plate, a first rotating plate, a second rotating plate, and gears;

[0011] The L-shaped clamping plate is mounted on the first mounting plate. A connecting plate is mounted on the lower end of the lower surface of the first mounting plate. A first rotating plate and a second rotating plate are rotatably mounted on the connecting plate.

[0012] The other end of the first rotating plate is rotatably mounted on the inner wall of the first mounting box, and the other end of the second rotating plate is equipped with gears. The shaft of the gear is rotatably mounted on the inner wall of the first mounting box, and the rack meshes with the gears on the same side of the two clamping modules for transmission.

[0013] As an optional solution, the lifting and mounting assembly includes a first telescopic boom with a turntable, the turntable at the bottom end of the first telescopic boom being rotatably mounted on the vehicle body;

[0014] A first mounting block is installed at the other end of the first telescopic boom. A lifting column is hinged to the front end of the first mounting block. A first hydraulic cylinder for adjusting the vertical angle of the lifting column is also hinged between the side wall of the lifting column and the first mounting block.

[0015] The top of the lifting column is equipped with a positioning and clamping mechanism for positioning and clamping the middle part of the steel arch frame, and both sides of the lifting column are equipped with a jacking support mechanism for expanding the arc-shaped I-beam.

[0016] As an optional solution, the positioning and clamping mechanism includes a first top block, a second U-shaped positioning groove, a positioning boss, a sliding groove, a clamping block, and a second hydraulic cylinder;

[0017] The first top block is installed at the top of the lifting column. The first top block has a second U-shaped positioning groove for engaging the arc-shaped I-beam in the middle of the steel arch frame. The inner wall of the second U-shaped positioning groove is provided with a positioning boss. The arc-shaped I-beam is provided with a positioning groove corresponding to the positioning boss.

[0018] The second U-shaped positioning groove has sliding grooves on both sides of its inner and outer walls, which are used to hold the arc-shaped I-beam in the middle of the steel arch frame to slide along the sliding grooves. A second oil cylinder is installed on the outside of the first top block, and the extension end of the second oil cylinder is connected to the holding block.

[0019] As an optional solution, the ejection support mechanism includes a second telescopic boom, a third hydraulic cylinder, a second mounting block, a second top block, a U-shaped groove, an arc groove, a limiting plate, an annular guide rod, and a first spring;

[0020] The bottom end of the second telescopic boom is hinged to the side wall of the lifting column, and a third hydraulic cylinder for adjusting the angle of the second telescopic boom is also hinged between the side wall of the second telescopic boom and the side wall of the lifting column.

[0021] A second mounting block is installed at the top of the second telescopic boom. The bottom end of the second top block is hinged to the second mounting block. A U-shaped groove for engaging an arc-shaped I-beam is provided at the upper end of the second top block. Both ends of the annular guide rod are fixed to the bottom end surface of the second top block. An arc-shaped groove for avoiding the annular guide rod is provided on the second mounting block. A limit plate is installed in the arc-shaped groove. The annular guide rod slides through the limit plate. A first spring is sleeved on the annular guide rod on both sides of the limit plate.

[0022] As an optional solution, the vehicle body is also equipped with two sets of disassembly and assembly components for disassembling the clamping connection components. The two sets of disassembly and assembly components are respectively located on both sides of the lifting and mounting components.

[0023] As an optional solution, the dismantling and construction assembly includes a third telescopic boom with a turntable, the turntable at the bottom of the third telescopic boom being rotatably mounted on the vehicle body;

[0024] A third mounting block is installed at the other end of the third telescopic boom. An adjustment plate is hinged to the front end of the third mounting block. A fourth hydraulic cylinder for adjusting the angle of the adjustment plate is also hinged between the third mounting block and the first mounting block.

[0025] A protective frame is rotatably mounted on the adjustment plate, and a disassembly mechanism for disassembling the clamping mechanism is installed at the front end of the protective frame.

[0026] As an optional solution, the disassembly mechanism includes a first mounting plate, a second rotating plate, and a disassembly module;

[0027] The first mounting plate is installed at the front end of the protective frame, and the second rotating plate is mounted on the first mounting plate by a motor. Two sets of disassembly modules are installed on the second rotating plate.

[0028] Each of the disassembly modules includes a T-shaped mounting plate, a cylinder, a second mounting box, a drive motor, a sliding sleeve, a screw sleeve, a second spring, a positioning plate, a magnet, and a guide rod.

[0029] The cylinder is mounted on the second rotating plate via a T-shaped mounting plate. The telescopic end of the cylinder is fitted with a second mounting box with an open top. A drive motor is installed inside the second mounting box. A guide rod is installed on the bottom surface of the second mounting box. The guide rod slides and guides the T-shaped mounting plate. Positioning plates for engaging with the side walls of the first mounting box are installed on the side walls of the second mounting box.

[0030] The sliding sleeve is installed at the power output end of the drive motor, the second spring is installed inside the sliding sleeve, the screw sleeve is slidably disposed inside the sliding sleeve, the two ends of the second spring are respectively connected to the bottom inner end face of the sliding sleeve and the bottom end of the screw sleeve, and a magnet is installed in the nut hole of the screw sleeve.

[0031] As an optional solution, the rear side of the vehicle body is provided with a limiting placement groove for placing the bottom end of the folding steel arch frame, and telescopic outriggers are provided on both sides of the vehicle body.

[0032] As described above, the tunnel support construction device of the present invention, applicable to various surrounding rock conditions, has at least the following beneficial effects:

[0033] 1. This application uses a clamping connection component to sequentially connect several curved I-beams outside the tunnel, then folds the connected steel arch frame and places it on the jacking installation component, transports it to the construction site by vehicle, and uses the jacking installation component to lift the steel arch frame to the predetermined position. The installation process does not require the assembly and alignment of the curved I-beams inside the tunnel, resulting in high installation efficiency.

[0034] 2. This application sets up a lifting column and a second telescopic boom at the front end of the first telescopic boom. The lifting column lifts the steel arch frame, and the second telescopic boom opens the arc-shaped I-beams on both sides in sequence. This can meet the construction requirements of various excavation methods under different surrounding rock conditions and has a wide range of applications. Attached Figure Description

[0035] Figure 1 The diagram shows the structure of the support construction device of the present invention, which lifts the steel arch frame to the top of the tunnel and expands it.

[0036] Figure 2 The diagram shows the structure of the support construction device for placing the folded steel arch frame according to the present invention.

[0037] Figure 3 The diagram shown is a structural schematic of the clamping connection assembly of the present invention.

[0038] Figure 4 The diagram shown is a schematic representation of the internal structure of the clamping connection assembly of the present invention.

[0039] Figure 5 The diagram shown is a structural schematic of the arc-shaped I-beam of this invention.

[0040] Figure 6 The diagram shown is a structural schematic of the lifting and mounting assembly of the present invention.

[0041] Figure 7 The diagram shown is a structural schematic of the positioning and clamping mechanism of the present invention.

[0042] Figure 8 The diagram shown is a structural schematic of the ejection support mechanism of the present invention.

[0043] Figure 9 The diagram shown is a structural schematic of the disassembly and construction assembly of the present invention.

[0044] Figure 10 The diagram shown is a structural schematic of the disassembly mechanism of the present invention.

[0045] Figure 11 The diagram shows the structure of the sliding sleeve, screw sleeve, and second spring of the present invention.

[0046] In the diagram: 1-steel arch frame; 101-arc I-beam; 102-positioning groove;

[0047] 2-Clamping connection assembly; 201-First mounting box; 202-First U-shaped positioning groove; 203-Rack; 204-Push plate; 205-Drive screw; 206-L-shaped clamping plate; 207-First mounting plate; 208-Connecting plate; 209-First rotating plate; 210-Second rotating plate; 211-Gear;

[0048] 3-Vehicle body; 301-Limiting placement slot; 302-Telescopic outrigger;

[0049] 4-Lifting and mounting assembly; 401-First telescopic boom; 402-First mounting block; 403-Lifting column; 404-First hydraulic cylinder; 405-First top block; 406-Second U-shaped positioning groove; 407-Positioning boss; 408-Slide groove; 409-Clamping block; 410-Second hydraulic cylinder; 411-Second telescopic boom; 412-Third hydraulic cylinder; 413-Second mounting block; 414-Second top block; 415-U-shaped slot; 416-Arc groove; 417-Limiting plate; 418-Annular guide rod; 419-First spring;

[0050] 5-Disassembly of construction components; 501-Third telescopic boom; 502-Third mounting block; 503-Adjusting plate; 504-Fourth hydraulic cylinder; 505-Protective frame; 506-First mounting plate; 507-Second rotating plate; 508-T-shaped mounting plate; 509-Cylinder; 510-Second mounting box; 511-Drive motor; 512-Sliding sleeve; 513-Screw sleeve; 514-Second spring; 515-Positioning plate; 516-Magnet; 517-Guide rod. Detailed Implementation

[0051] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0052] Please see Figures 1 to 11 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0053] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0054] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The present invention provides a tunnel support construction device applicable to various surrounding rock conditions. The tunnel support includes a steel arch frame 1, which includes a plurality of arc-shaped I-beams 101 connected in sequence. The device is characterized in that two adjacent arc-shaped I-beams 101 are connected by a clamping connection assembly 2. The clamping connection assembly 2 includes two clamping mechanisms that are hinged to each other, and the two clamping mechanisms are respectively clamped at the adjacent ends of the two arc-shaped I-beams 101.

[0055] The support construction device also includes a vehicle body 3, on which a lifting installation assembly 4 is installed for clamping and lifting the steel arch frame 1 and spreading out several arc-shaped I-beams 101.

[0056] In this embodiment of the invention, several arc-shaped I-beams 101 are connected and folded sequentially outside the tunnel using multiple clamping and connecting components 2. The folded steel arch frame 1 is then placed on the lifting and mounting component 4. The vehicle body 3 moves to the tunnel construction surface and lifts and expands the folded steel arch frame 1 using the lifting and mounting component 4. The fixing screws are then installed manually, and the transverse ribs are welded. After welding is completed, the clamping and connecting components 2 are removed, the lifting and mounting component 4 returns to its initial position, and the vehicle body 3 exits outside the tunnel.

[0057] In this embodiment of the invention, the positioning and assembly of the steel arch frame 1 is completed outside the tunnel, which reduces the time for alignment and assembly on the tunnel construction surface and improves the efficiency of tunnel excavation. At the same time, positioning and assembling the steel arch frame 1 in an open area outside the tunnel reduces the labor intensity of manual labor. Furthermore, the clamping and connecting component 2 is a reusable component with low cost.

[0058] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The clamping mechanism includes a first mounting box 201, a first U-shaped positioning groove 202, a double-sided rack 203, a push plate 204, and a drive screw 205;

[0059] The two first mounting boxes 201 of the adjacent clamping mechanism are hinged to each other. The upper end of the first mounting box 201 is open. The top of the side walls at both ends of the first mounting box 201 is provided with a first U-shaped positioning groove 202. The clamping mechanism is provided with clamping modules on both sides for clamping the arc-shaped I-beam 101.

[0060] The drive screw 205 is threadedly connected to the bottom end face of the first mounting box 201. One end of the drive screw 205 located inside the first mounting box 201 is rotatably mounted on the bottom end face of the push plate 204 through a bearing. Both ends of the upper end face of the push plate 204 are equipped with double-sided racks 203. The double-sided racks 203 mesh with the clamping modules on both sides to drive the clamping modules to clamp the arc-shaped I-beam 101.

[0061] In this embodiment of the invention, during clamping, the first U-shaped positioning groove 202 is engaged below the arc-shaped I-beam 101. By rotating the drive screw 205, the push plate 204 and the double-sided rack 203 move towards the upper end of the first mounting box 201. The double-sided rack 203 drives the clamping modules on both sides to clamp the two sides of the arc-shaped I-beam 101.

[0062] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The clamping module includes an L-shaped clamping plate 206, a first mounting plate 207, a connecting plate 208, a first rotating plate 209, a second rotating plate 210, and a gear 211;

[0063] The L-shaped clamping plate 206 is mounted on the first mounting plate 207. A connecting plate 208 is mounted on the lower end of the lower end face of the first mounting plate 207. A first rotating plate 209 and a second rotating plate 210 are rotatably mounted on the connecting plate 208.

[0064] The other end of the first rotating plate 209 is rotatably mounted on the inner wall of the first mounting box 201, and the other end of the second rotating plate 210 is equipped with gears 211. The shaft of the gears 211 is rotatably mounted on the inner wall of the first mounting box 201, and the double-sided rack 203 meshes with the gears 211 on the same side of the two clamping modules for transmission.

[0065] In this embodiment of the invention, when the double-sided rack 203 moves towards the upper end of the first mounting box 201, the double-sided rack 203 drives the gears 211 on the same side of the two clamping modules to rotate, and the L-shaped clamping plate 206 clamps the two sides of the arc-shaped I-beam 101; when the double-sided rack 203 moves towards the lower end of the first mounting box 201, the L-shaped clamping plate 206 releases the arc-shaped I-beam 101.

[0066] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The lifting and mounting assembly 4 includes a first telescopic boom 401 with a turntable, and the turntable at the bottom end of the first telescopic boom 401 is rotatably mounted on the vehicle body 3.

[0067] The other end of the first telescopic boom 401 is equipped with a first mounting block 402. A lifting column 403 is hinged to the front end of the first mounting block 402. A first hydraulic cylinder 404 for adjusting the vertical angle of the lifting column 403 is also hinged between the side wall of the lifting column 403 and the first mounting block 402.

[0068] The top of the lifting column 403 is equipped with a positioning and clamping mechanism for positioning and clamping the middle part of the steel arch frame 1, and the two side walls of the lifting column 403 are equipped with a push-out support mechanism for opening the arc-shaped I-beam 101.

[0069] In this invention, when full-face construction is adopted, the number of arc-shaped I-beams 101 is 5; when two-step construction is adopted, the number of arc-shaped I-beams 101 on the upper step is 3; when the steel arch frame 1 is placed on the vehicle body 3, the middle arc-shaped I-beam 101 is placed on the positioning and clamping mechanism, and the folded arc-shaped I-beam 101 is supported by the push-out support mechanisms on both sides.

[0070] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8The positioning and clamping mechanism includes a first top block 405, a second U-shaped positioning groove 406, a positioning boss 407, a sliding groove 408, a clamping block 409, and a second hydraulic cylinder 410.

[0071] The first top block 405 is installed at the top of the lifting column 403. The first top block 405 is provided with a second U-shaped positioning groove 406 for engaging the arc-shaped I-beam 101 in the middle of the steel arch frame 1. The inner wall of the second U-shaped positioning groove 406 is provided with a positioning boss 407. The arc-shaped I-beam 101 is provided with a positioning groove 102 corresponding to the positioning boss 407.

[0072] The second U-shaped positioning groove 406 has sliding grooves 408 on both sides of its inner and outer walls, and the clamping block 409 for the arc-shaped I-beam 101 in the middle of the steel arch frame 1 slides along the sliding groove 408. A second oil cylinder 410 is installed on the outside of the first top block 405, and the telescopic end of the second oil cylinder 410 is connected to the clamping block 409.

[0073] In this embodiment of the invention, during clamping, the central arc-shaped I-beam 101 is placed in the second U-shaped positioning groove 406, and the second hydraulic cylinder 410 pushes the clamping block 409 to clamp the arc-shaped I-beam 101.

[0074] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The ejection support mechanism includes a second telescopic boom 411, a third hydraulic cylinder 412, a second mounting block 413, a second top block 414, a U-shaped slot 415, an arc-shaped groove 416, a limiting plate 417, an annular guide rod 418, and a first spring 419.

[0075] The bottom end of the second telescopic boom 411 is hinged to the side wall of the lifting column 403. A third hydraulic cylinder 412 for adjusting the angle of the second telescopic boom 411 is also hinged between the side wall of the second telescopic boom 411 and the side wall of the lifting column 403.

[0076] The top end of the second telescopic boom 411 is equipped with a second mounting block 413. The bottom end of the second top block 414 is hinged to the second mounting block 413. The upper end of the second top block 414 is provided with a U-shaped slot 415 for engaging the arc-shaped I-beam 101. Both ends of the annular guide rod 416 are fixed to the bottom end surface of the second top block 414. The second mounting block 413 is provided with an arc-shaped groove 416 to avoid the annular guide rod 416. A limiting plate 417 is installed in the arc-shaped groove 416. The annular guide rod 416 slides through the limiting plate 417. A first spring 419 is sleeved on the annular guide rod 416 on both sides of the limiting plate 417.

[0077] In this embodiment of the invention, during the full-face construction jacking, the first telescopic boom 401 extends and lifts the middle arc-shaped I-beam 101 to the top of the tunnel. Then, the second telescopic booms 411 on both sides extend to spread the arc-shaped I-beams 101 on both sides of the middle arc-shaped I-beam 101 apart, so that the mounting flanges at their ends abut against the mounting flanges at the ends of the middle arc-shaped I-beam 101. Screws are then manually connected to the mounting flanges of the arc-shaped I-beams 101 to fix them together. The second telescopic boom 411 retracts and its angle is adjusted to support the two bottom arc-shaped I-beams 101, which are then fixed with screws.

[0078] In an example of the present invention, when the two-stage construction is carried out, the first telescopic boom 401 is pushed out and lifted, so that the middle arc-shaped I-beam 101 is lifted to the top of the tunnel on the second stage surface, and the arc-shaped I-beams 101 on both sides are opened by the second telescopic boom 411.

[0079] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 9 , Figure 10 and Figure 11 The vehicle body 3 is also equipped with two sets of disassembly and construction components 5 for disassembling the clamping and connecting components 2. The two sets of disassembly and construction components 5 are respectively arranged on both sides of the lifting and installation components 4.

[0080] Please see Figure 1 , Figure 2 , Figure 5 , Figure 9 , Figure 10 and Figure 11 The dismantling and construction assembly 5 includes a third telescopic boom 501 with a turntable, and the turntable at the bottom end of the third telescopic boom 501 is rotatably mounted on the vehicle body 3.

[0081] The other end of the third telescopic boom 501 is equipped with a third mounting block 502. An adjusting plate 503 is hinged to the front end of the third mounting block 502. A fourth hydraulic cylinder 504 for adjusting the angle of the adjusting plate 503 is also hinged between the third mounting block 502 and the first mounting block 402.

[0082] A protective frame 505 is rotatably mounted on the adjusting plate 503, and a disassembly mechanism for disassembling the clamping mechanism is installed at the front end of the protective frame 505.

[0083] In this embodiment of the invention, during construction, the operator stands in the protective frame 505, the third telescopic boom 501 lifts the disassembly construction component 5 to a predetermined height, the operator connects screws to the mounting flange adjacent to the end of the arc-shaped I-beam 101, and welds the transverse reinforcing bars.

[0084] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 9 , Figure 10 and Figure 11 The disassembly mechanism includes a first mounting plate 506, a second rotating plate 507, and a disassembly module;

[0085] The first mounting plate 506 is installed at the front end of the protective frame 505, and the second rotating plate 507 is mounted on the first mounting plate 506 by a motor. Two sets of disassembly modules are installed on the second rotating plate 507.

[0086] Each of the disassembly modules includes a T-shaped mounting plate 508, a cylinder 509, a second mounting box 510, a drive motor 511, a sliding sleeve 512, a screw sleeve 513, a second spring 514, a positioning plate 515, a magnet 516, and a guide rod 517.

[0087] The cylinder 509 is mounted on the second rotating plate 507 via a T-shaped mounting plate 508. The telescopic end of the cylinder 509 is equipped with a second mounting box 510 with an upper opening. A drive motor 511 is installed inside the second mounting box 510. A guide rod 517 is installed on the bottom surface of the second mounting box 510. The guide rod 517 slides and guides the T-shaped mounting plate 508. Positioning plates 515 for engaging with the side wall of the first mounting box 201 are installed on the side wall of the second mounting box 510.

[0088] The sliding sleeve 512 is installed at the power output end of the drive motor 511, the second spring 514 is installed inside the sliding sleeve 512, the screw sleeve 513 is slidably disposed inside the sliding sleeve 512, the two ends of the second spring 514 are respectively connected to the inner bottom end face of the sliding sleeve 512 and the bottom end of the screw sleeve 513, and a magnet 516 is installed in the nut hole of the screw sleeve 513.

[0089] In this embodiment of the invention, while the operator is installing screws and welding, the motor drives the second rotating plate 507 to rotate, and the cylinder 509 pushes out, so that the positioning plate 515 is snapped onto the outer wall of the first mounting box 201. At the same time, the screw sleeve 513 is fitted onto the nut of the drive screw 205, and the magnet 516 attracts the nut. The drive motor 511 is started, and the screw sleeve 513 causes the drive screw 205 to move closer to the lower end face of the first mounting box 201.

[0090] Please see Figure 1 and Figure 2 The rear side of the vehicle body 3 is provided with a limiting placement groove 301 for placing the bottom end of the folding steel arch frame 1, and telescopic outriggers 302 are provided on both sides of the vehicle body 3.

[0091] In this embodiment of the invention, during transportation, the lower end of the folding steel arch frame 1 is placed in the placement slot 301 to facilitate the vehicle body 3 in transporting the folding steel arch frame 1 to the tunnel construction face. After the vehicle body 3 moves to the designated position, the telescopic outriggers 302 are extended to support the vehicle body before the lifting operation is carried out.

[0092] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A tunnel support construction device suitable for various surrounding rock conditions, the tunnel support construction device comprising a steel arch frame (1), the steel arch frame (1) comprising a plurality of sequentially connected arc-shaped I-beams (101), characterized in that, Two adjacent arc-shaped I-beams (101) are connected by a clamping connection assembly (2). The clamping connection assembly (2) includes two clamping mechanisms that are hinged to each other. The two clamping mechanisms are respectively clamped at the adjacent ends of the two arc-shaped I-beams (101). The tunnel support construction device also includes a vehicle body (3), on which a lifting installation assembly (4) is installed for clamping the lifting steel arch frame (1) and spreading out several arc-shaped I-beams (101). The clamping mechanism includes a first mounting box (201), a first U-shaped positioning groove (202), a rack (203), a push plate (204), and a drive screw (205). The two first mounting boxes (201) of the adjacent clamping mechanism are hinged to each other. The upper end of the first mounting box (201) is open. The top of the side walls at both ends of the first mounting box (201) is provided with a first U-shaped positioning groove (202). The clamping mechanism is provided with clamping modules on both sides for clamping the arc-shaped I-beam (101). The drive screw (205) is threaded to the bottom end face of the first mounting box (201). One end of the drive screw (205) located inside the first mounting box (201) is rotatably mounted on the bottom end face of the push plate (204) through a bearing. Both ends of the upper end face of the push plate (204) are equipped with racks (203). The racks (203) mesh with the clamping modules on both sides to drive the clamping modules to clamp the arc-shaped I-beam (101). The clamping module includes an L-shaped clamping plate (206), a first mounting plate (207), a connecting plate (208), a first rotating plate (209), a second rotating plate (210), and a gear (211). The L-shaped clamping plate (206) is mounted on the first mounting plate (207). A connecting plate (208) is mounted on the lower end of the lower surface of the first mounting plate (207). A first rotating plate (209) and a second rotating plate (210) are rotatably mounted on the connecting plate (208). The other end of the first rotating plate (209) is rotatably mounted on the inner wall of the first mounting box (201), and the other end of the second rotating plate (210) is equipped with a gear (211). The shaft of the gear (211) is rotatably mounted on the inner wall of the first mounting box (201), and the rack (203) meshes with the gear (211) on the same side of the two clamping modules for transmission.

2. The tunnel support construction device applicable to various surrounding rock conditions as described in claim 1, characterized in that, The lifting and mounting assembly (4) includes a first telescopic boom (401) with a turntable, and the turntable at the bottom end of the first telescopic boom (401) is rotatably mounted on the vehicle body (3). The other end of the first telescopic boom (401) is equipped with a first mounting block (402), and a lifting column (403) is hinged to the front end of the first mounting block (402). A first hydraulic cylinder (404) for adjusting the vertical angle of the lifting column (403) is also hinged between the side wall of the lifting column (403) and the first mounting block (402). The top of the lifting column (403) is equipped with a positioning and clamping mechanism for positioning and clamping the middle part of the steel arch frame (1), and both sides of the lifting column (403) are equipped with a push-out support mechanism for opening the arc-shaped I-beam (101).

3. The tunnel support construction device applicable to various surrounding rock conditions as described in claim 2, characterized in that, The positioning and clamping mechanism includes a first top block (405), a second U-shaped positioning groove (406), a positioning boss (407), a sliding groove (408), a clamping block (409), and a second hydraulic cylinder (410). The first top block (405) is installed on the top of the lifting column (403). The first top block (405) is provided with a second U-shaped positioning groove (406) for engaging the arc-shaped I-beam (101) in the middle of the steel arch frame (1). The inner wall of the second U-shaped positioning groove (406) is provided with a positioning boss (407). The arc-shaped I-beam (101) is provided with a positioning groove (102) corresponding to the positioning boss (407). The second U-shaped positioning groove (406) has sliding grooves (408) on both sides of its inner and outer walls. The clamping block (409) for the arc-shaped I-beam (101) in the middle of the steel arch frame (1) slides along the sliding groove (408). The first top block (405) is equipped with a second oil cylinder (410), and the telescopic end of the second oil cylinder (410) is connected to the clamping block (409).

4. The tunnel support construction device applicable to various surrounding rock conditions as described in claim 3, characterized in that, The ejection support mechanism includes a second telescopic boom (411), a third hydraulic cylinder (412), a second mounting block (413), a second top block (414), a U-shaped slot (415), an arc-shaped groove (416), a limiting plate (417), an annular guide rod (418), and a first spring (419). The bottom end of the second telescopic boom (411) is hinged to the side wall of the lifting column (403), and a third hydraulic cylinder (412) for adjusting the angle of the second telescopic boom (411) is also hinged between the side wall of the second telescopic boom (411) and the side wall of the lifting column (403). The top end of the second telescopic boom (411) is equipped with a second mounting block (413), and the bottom end of the second top block (414) is hinged to the second mounting block (413). The upper end of the second top block (414) is provided with a U-shaped slot (415) for engaging the arc-shaped I-beam (101). Both ends of the annular guide rod (418) are fixed to the bottom end surface of the second top block (414). The second mounting block (413) is provided with an arc-shaped groove (416) to avoid the annular guide rod (418). A limit plate (417) is installed in the arc-shaped groove (416). The annular guide rod (418) slides through the limit plate (417). A first spring (419) is sleeved on the annular guide rod (418) on both sides of the limit plate (417).

5. The tunnel support construction device applicable to various surrounding rock conditions as described in claim 1, characterized in that, The vehicle body (3) is also equipped with two sets of disassembly construction components (5) for disassembling the clamping connection component (2), and the two sets of disassembly construction components (5) are respectively located on both sides of the lifting installation component (4).

6. The tunnel support construction device applicable to various surrounding rock conditions as described in claim 5, characterized in that, The dismantling construction assembly (5) includes a third telescopic boom (501) with a turntable, and the turntable at the bottom end of the third telescopic boom (501) is rotatably mounted on the vehicle body (3). The other end of the third telescopic boom (501) is equipped with a third mounting block (502), and an adjusting plate (503) is hinged to the front end of the third mounting block (502). A fourth hydraulic cylinder (504) for adjusting the angle of the adjusting plate (503) is also hinged between the third mounting block (502) and the first mounting block (402). A protective frame (505) is rotatably mounted on the adjusting plate (503), and a disassembly mechanism for disassembling the clamping mechanism is installed at the front end of the protective frame (505).

7. The tunnel support construction device applicable to various surrounding rock conditions as described in claim 6, characterized in that, The disassembly mechanism includes a first mounting plate (506), a second rotating plate (507), and a disassembly module; The first mounting plate (506) is installed at the front end of the protective frame (505), and the second rotating plate (507) is mounted on the first mounting plate (506) by a motor. Two sets of disassembly modules are installed on the second rotating plate (507). Each of the disassembly modules includes a T-shaped mounting plate (508), a cylinder (509), a second mounting box (510), a drive motor (511), a sliding sleeve (512), a screw sleeve (513), a second spring (514), a positioning plate (515), a magnet (516), and a guide rod (517). The cylinder (509) is mounted on the second rotating plate (507) via a T-shaped mounting plate (508). The telescopic end of the cylinder (509) is equipped with a second mounting box (510) with an open top. A drive motor (511) is installed inside the second mounting box (510). A guide rod (517) is installed on the bottom surface of the second mounting box (510). The guide rod (517) slides and guides the T-shaped mounting plate (508). Positioning plates (515) for engaging with the side wall of the first mounting box (201) are installed on the side wall of the second mounting box (510). The sliding sleeve (512) is installed at the power output end of the drive motor (511), the second spring (514) is installed inside the sliding sleeve (512), the screw sleeve (513) is slidably disposed inside the sliding sleeve (512), the two ends of the second spring (514) are respectively connected to the bottom inner surface of the sliding sleeve (512) and the bottom end of the screw sleeve (513), and a magnet (516) is installed in the nut hole of the screw sleeve (513).

8. The tunnel support construction device applicable to various surrounding rock conditions as described in claim 1, characterized in that, The rear side of the vehicle body (3) is provided with a limiting placement groove (301) for placing the bottom end of the folding steel arch frame (1), and telescopic outriggers (302) are provided on both sides of the vehicle body (3).

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