Tunnel supporting device and method for civil construction

Abstract

The invention belongs to the technical field of tunnel construction, and particularly relates to a tunnel supporting device and method for civil construction, the tunnel supporting device comprises first L-shaped bases, a second L-shaped base and a third L-shaped base, multifunctional structures are fixedly mounted on the inner sides of the two first L-shaped bases, and each multifunctional structure comprises a first fixing plate set; worms are rotationally installed between the two first fixing plate sets, scissor fork type telescopic assemblies are arranged between the two first L-shaped bases, the second L-shaped base and the third L-shaped base, and the special self-locking performance when the worms are engaged with the worm gear tooth sets and the special self-locking performance when the worms are engaged with the worm gear tooth sets are utilized. Tooth shapes of the worm gear tooth group and the worm are generally involute or arc tooth shapes, meshing of the tooth shapes has a high contact ratio, loads can be effectively dispersed, the problem that due to the fact that the ground in a tunnel is hollow, when a second L-shaped base and a third L-shaped base are moved through a shear fork type telescopic assembly, the second L-shaped base and the third L-shaped base are difficult to move can be solved, and the service life of the second L-shaped base and the third L-shaped base is prolonged. The reliability and portability are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction, and more specifically, particularly relates to a tunnel supporting device and method for civil construction. Background Art

[0002] Tunnel construction is a complex engineering activity of excavating passages underground or in mountains, involving a variety of technologies and methods. In the process of tunnels passing through different geological areas, various adverse geological conditions may be encountered, such as soft strata, fault fracture zones, and karst caves. The surrounding rock stability in these areas is poor, which can easily lead to deformation, cracks and other problems in the tunnel, seriously affecting the safety of the tunnel. Therefore, it is necessary to take timely measures and use various support devices for reinforcement to prevent the problem from further expanding and ensure the smooth progress and long-term stable operation of the tunnel project.

[0003] For example, a "support device for tunnel construction" with a Chinese patent publication number of CN117627707A can drive the support platform to slide on the track through a displacement component arranged inside the installation box, so that the equipment can be moved along with the progress of the project. The track is pre-laid and does not need to be repositioned after moving, which can improve the efficiency of construction. The lifting component arranged on the installation plate can adjust the height of the top plate, and the angle of the side plate can be adjusted through the adjustment component, so that it can adapt to tunnels of different specifications, thereby ensuring the flexibility of the use of the device. However, in the process of implementing the above technical solution, it was found that there were at least the following technical problems: when the device is in use, it is necessary to use multiple cylinders, motors and air pumps. Due to the small space inside the tunnel, it is difficult and costly to lay power supply lines in long-distance tunnels. The simultaneous operation of multiple cylinders, motors and air pumps requires a large amount of power supply. In the special environment of the tunnel, it is difficult to meet such a high power demand. At the same time, due to the large overall size of the device, it will be difficult for workers to enter and exit when supporting and protecting the vulnerable positions of the tunnel. Therefore, the practicality of the device is insufficient and needs to be improved; Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a tunnel support device for civil construction is provided, in order to achieve a purpose with greater practical value. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a tunnel supporting device and method for civil construction to solve the above problems.

[0005] In a first aspect of the present invention, a tunnel support device for civil construction includes a first L-shaped base, a second L-shaped base, and a third L-shaped base, wherein the two second L-shaped bases are located between the first L-shaped base and the third L-shaped base; A multifunctional structure is fixedly installed on the inner sides of the two first L-shaped bases; The multifunctional structure includes a first fixed plate group, a worm is rotatably installed between the two first fixed plate groups, a scissor-type telescopic assembly is provided between the two first L-shaped bases, the second L-shaped base and the third L-shaped base, a transmission column is provided on the side walls of the two scissor-type telescopic assemblies, both of the transmission columns are partially exposed outside the first L-shaped base, arc-shaped parts are fixedly installed on the circumferential surfaces of the two transmission columns, both of the arc-shaped parts are located outside the scissor-type telescopic assemblies, worm gear tooth groups are provided on the outsides of the two arc-shaped parts, and both of the worm gear tooth groups are meshed with the worm.

[0006] Preferably, a slide groove is formed through the inside of the two first L-shaped bases, side grooves are symmetrically formed on the inner walls of the two slide grooves, sliders are symmetrically fixedly installed on the side walls of the two worm gear tooth groups, a slide bar is symmetrically fixedly installed on the surface of each slider, each slider is located inside the slide groove, each slider is slidably installed with the slide groove, each slide bar is located inside the side groove, and each slide bar is slidably installed with the side groove.

[0007] Preferably, the surfaces of the two first L-shaped bases and the third L-shaped base are fixedly mounted with hanging handles, and the lower ends of the two first L-shaped bases, the second L-shaped base and the third L-shaped base are all provided with universal wheels.

[0008] Preferably, the upper ends of the two first L-shaped bases, the second L-shaped base and the third L-shaped base are fixedly mounted with cylindrical jacks, the output shafts of each cylindrical jack are fixedly mounted with support frames between each pair of output shafts, and the telescopic shelves are threadedly mounted between each pair of support frames.

[0009] Preferably, each of the cylindrical jacks is provided with a transmission handle on the side wall, a spring telescopic rod is fixedly installed inside each of the transmission handles, a through slot is penetrated through the piston of each of the spring telescopic rods, a special-shaped plate is provided between each of the spring telescopic rods, a plurality of second fixed plate groups are fixedly installed on the upper end of the special-shaped plates, a rotating shaft is fixedly installed on the inner side of each of the second fixed plate groups, each of the second fixed plate groups and the rotating shaft are parallel to the spring telescopic rod, and each of the through slots is rotatably installed with the rotating shaft.

[0010] Preferably, a fixing block is fixedly installed at the lower end of the special-shaped plate, a circular groove is opened inside the fixing block, a ball hinge is provided inside the circular groove, and a transmission rod is fixedly installed on the circumferential surface of the ball hinge.

[0011] In a second aspect of the present invention, a working method of the tunnel support device for civil construction comprises the following steps: When no support is performed, the first L-shaped base, the second L-shaped base and the third L-shaped base are in a retracted state through the scissor-type telescopic assembly; When it is necessary to support the vulnerable part of the tunnel, the worm is rotated, and the worm is meshed with the worm gear teeth group on the outside of the two arc-shaped parts, generating radial force, causing the worm gear teeth group to rotate as a whole; The rotation of the worm gear tooth group drives the transmission column to move through the arc-shaped member, thereby driving the connecting rod of the scissor-type telescopic assembly to expand; the expansion of the scissor-type telescopic assembly causes the second L-shaped base and the third L-shaped base to move away from the first L-shaped base, thereby adjusting the support area according to the size of the vulnerable part of the tunnel; While the worm gear teeth group rotates, the slider and the slide bar slide in the slide groove and the side groove respectively, providing additional limit and increasing the stability of the device during the expansion process; When the second L-shaped base and the third L-shaped base move to the desired position, the transmission rod is pulled back and forth in the up and down directions; the transmission rod drives the spring telescopic rod to move back and forth up and down through the fixed block and the special-shaped plate; the piston movement of the spring telescopic rod causes the pump cylinder under the transmission handle to pressurize the inside of the cylindrical jack; according to Pascal's principle, the large piston of the cylindrical jack generates an upward force after being subjected to pressure, pushing the support frame and the telescopic shed to rise as a whole, thereby supporting and reinforcing the vulnerable parts of the tunnel.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by rotating the worm, the worm can be rotated on the first fixed plate group and meshed with the worm gear tooth group on the arc-shaped member, so that the worm gear tooth group generates a radial force to rotate as a whole, and then a radial force can be generated on the transmission column of the scissor-type telescopic assembly, so that the transmission column moves, so that the connecting rod of the scissor-type telescopic assembly can be expanded, and then a radial force is generated to drive the second L-shaped base and the third L-shaped base to move to the side away from the first L-shaped base, so that the support area can be adjusted according to the size of the vulnerable part of the tunnel, thereby improving applicability; In the present invention, by utilizing the special self-locking property of the worm and the worm wheel tooth group when meshing, and when the worm and the worm wheel tooth group are meshing, the tooth profiles of the worm wheel tooth group and the worm are usually involute or arc tooth profiles, and the meshing of such tooth profiles has a high overlap, which can effectively disperse the load, thereby avoiding the problem of difficulty in moving the second L-shaped base and the third L-shaped base due to potholes on the ground in the tunnel or the problem of inaccurate support of the first L-shaped base, the second L-shaped base, and the third L-shaped base when the scissor-type telescopic assembly is used to move the second L-shaped base and the third L-shaped base, thereby improving reliability and portability; In the present invention, by providing a first L-shaped base, a second L-shaped base, a third L-shaped base and a support frame, the overall shape of the device is an arch, which is consistent with the shape of the tunnel, and the multifunctional structure is installed on the inner side of the first L-shaped base, the second L-shaped base and the third L-shaped base, so that the first L-shaped base, the second L-shaped base and the third L-shaped base are hollow, which greatly reduces the impact on the entry and exit of the staff and improves the practicality; In the present invention, when the worm and the worm gear teeth group on the arc-shaped member are meshed to drive the connecting rod of the scissor-type telescopic assembly to expand and drive the second L-shaped base and the third L-shaped base to move, the arc-shaped member will drive the slider and the slide bar to slide in the slide groove and the side groove respectively, thereby providing additional limit and increasing stability; In the present invention, by reciprocatingly pulling the transmission rod in the up-and-down direction and limiting the spring telescopic rod by the transmission handle, when the transmission rod moves, the spring telescopic rod can be driven to move up and down through the second fixed plate group and the rotating shaft on the special-shaped plate, and then the transmission handle can be piston-moved, so that each cylindrical jack can be synchronously driven to rise at the same time to complete the rise of the support frame, so that the fragile parts of the tunnel can be supported more conveniently, and the practicality is further improved; In the present invention, by optimizing the structure of the device, workers can manually complete the support and protection work of vulnerable parts in the tunnel without any power support, and the occupied space is small, making the device more flexible and applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the three-dimensional explosion structure of the present invention; Figure 3 It is a schematic diagram of the support frame connection explosion structure of the present invention; Figure 4 It is a schematic diagram of the explosion structure of the cylindrical jack connection of the present invention; Figure 5 It is a schematic diagram of the explosion structure of the spring telescopic rod connection of the present invention; Figure 6 The present invention Figure 5 A magnified view of the structure at A; Figure 7 is a schematic diagram of the three-dimensional structure of the second fixing plate assembly of the present invention; Figure 8 It is a schematic diagram of the explosion structure of the ball head hinge connection of the present invention; Fig. 9 It is a schematic diagram of the explosion structure of the second L-shaped base connection of the present invention; Fig.10 It is a schematic diagram of the explosion structure of the hanging handle connection of the present invention; Fig.11 is a schematic diagram of the three-dimensional structure of the first L-shaped base of the present invention; Fig.12 It is a schematic diagram of the explosion structure of the scissor-type telescopic assembly connection of the present invention; Fig.13 It is a schematic diagram of the arc-shaped piece connection explosion structure of the present invention.

[0014] In the figure, the correspondence between the component names and the figure numbers is: 11. first L-shaped base; 12. second L-shaped base; 13. third L-shaped base; 14. first fixed plate group; 15. worm; 16. scissor-type telescopic assembly; 17. transmission column; 18. arc-shaped member; 19. worm gear group; 21. slide groove; 22. side groove; 23. slider; 24. slide bar; 25. hanging handle; 26. universal wheel; 27. cylindrical jack; 28. support frame; 29. ​​telescopic shed; 31. transmission handle; 32. spring telescopic rod; 33. through groove; 34. special-shaped plate; 35. second fixed plate group; 36. rotating shaft; 37. fixed block; 38. circular groove; 39. ball hinge; 41. transmission rod. DETAILED DESCRIPTION

[0015] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] See also Figure 1 - Fig.13 The present invention provides a tunnel support device for civil construction, comprising a first L-shaped base 11, a second L-shaped base 12, and a third L-shaped base 13, wherein the two second L-shaped bases 12 are both located between the first L-shaped base 11 and the third L-shaped base 13; A multifunctional structure is fixedly installed on the inner side of the two first L-shaped bases 11; The multifunctional structure includes a first fixed plate group 14, a worm 15 is rotatably installed between the two first fixed plate groups 14, a scissor-type telescopic assembly 16 is arranged between the two first L-shaped bases 11, the second L-shaped base 12 and the third L-shaped base 13, a transmission column 17 is arranged on the side wall of the two scissor-type telescopic assemblies 16, the two transmission columns 17 are partially exposed outside the first L-shaped base 11, and arc-shaped parts 18 are fixedly installed on the circumferential surfaces of the two transmission columns 17, the two arc-shaped parts 18 are located on the outside of the scissor-type telescopic assembly 16, and worm gear tooth groups 19 are arranged on the outside of the two arc-shaped parts 18, and the two worm gear tooth groups 19 are meshed and installed with the worm 15. By rotating the worm 15, the worm 15 can be rotated on the first fixed plate group 14 and meshed with the worm gear tooth group 19 on the arc-shaped part 18, so that the worm gear tooth group 19 generates a radial force to rotate as a whole, and then a radial force can be generated on the transmission column 17 of the scissor-type telescopic assembly 16, so that the transmission The movable column 17 moves, so that the connecting rod of the scissor-type telescopic assembly 16 can be expanded, and then a radial force is generated to drive the second L-shaped base 12 and the third L-shaped base 13 to move to the side away from the first L-shaped base 11, so that the support area can be adjusted according to the size of the vulnerable part of the tunnel, thereby improving applicability, and by utilizing the special self-locking property of the worm 15 and the worm gear tooth group 19 when they are meshed, and when the worm 15 and the worm gear tooth group 19 are meshed, the tooth profiles of the worm gear tooth group 19 and the worm 15 are usually involute or circular arc tooth profiles, and this tooth profile has a high degree of overlap and can effectively disperse the load. Therefore, it can avoid the problem of difficulty in moving the second L-shaped base 12 and the third L-shaped base 13 due to potholes in the tunnel when the scissor-type telescopic assembly 16 is used to move the second L-shaped base 12 and the third L-shaped base 13, or the problem of inaccurate support of the first L-shaped base 11, the second L-shaped base 12, and the third L-shaped base 13, thereby improving reliability and portability.

[0019] A slide groove 21 is provided through the inside of the two first L-shaped bases 11, and side grooves 22 are symmetrically provided on the inner walls of the two slide grooves 21. Slide blocks 23 are symmetrically fixedly installed on the side walls of the two worm gear tooth groups 19, and a slide bar 24 is symmetrically fixedly installed on the surface of each slide block 23. Each slide block 23 is located in the slide groove 21, and each slide block 23 is slidably installed with the slide groove 21. Each slide bar 24 is located in the side groove 22, and each slide bar 24 is slidably installed with the side groove 22. When the worm 15 engages with the worm gear tooth group 19 on the arc-shaped member 18 to drive the connecting rod of the scissor-type telescopic assembly 16 to expand and drive the second L-shaped base 12 and the third L-shaped base 13 to move, the arc-shaped member 18 will drive the slide block 23 and the slide bar 24 to slide in the slide groove 21 and the side groove 22 respectively, thereby providing additional limit and increasing stability.

[0020] A lifting handle 25 is fixedly installed on the surface of the two first L-shaped bases 11 and the third L-shaped base 13, and universal wheels 26 are provided on the lower ends of the two first L-shaped bases 11, the second L-shaped base 12, and the third L-shaped base 13. By providing the lifting handle 25 and the universal wheel 26, the staff can use a trailer to move the entire device to the position to be supported.

[0021] The upper ends of the two first L-shaped bases 11, the second L-shaped base 12, and the third L-shaped base 13 are all fixedly installed with cylindrical jacks 27, and support frames 28 are fixedly installed between the output shafts of each cylindrical jack 27, and telescopic sheds 29 are threadedly installed between each support frame 28. By arranging the first L-shaped base 11, the second L-shaped base 12, the third L-shaped base 13 and the support frame 28, the overall shape of the device is arched, which conforms to the shape of the tunnel, and the multifunctional structure is installed on the inner side of the first L-shaped base 11, the second L-shaped base 12, and the third L-shaped base 13. Therefore, the first L-shaped base 11, the second L-shaped base 12, and the third L-shaped base 13 are hollow, which greatly reduces the impact on the entry and exit of the staff and improves the practicality. In addition, by arranging the telescopic shed 29, it is possible to prevent small stones and soil blocks from falling from the fragile parts of the tunnel and affecting the normal passage of the staff.

[0022] A transmission handle 31 is provided on the side wall of each cylindrical jack 27, a spring telescopic rod 32 is fixedly installed inside each transmission handle 31, a through slot 33 is penetrated through the piston of each spring telescopic rod 32, a special-shaped plate 34 is provided between each spring telescopic rod 32, a plurality of second fixed plate groups 35 are fixedly installed on the upper end of the special-shaped plate 34, a rotating shaft 36 is fixedly installed on the inner side of each second fixed plate group 35, each second fixed plate group 35 and the rotating shaft 36 are parallel to the spring telescopic rod 32, and each through slot 33 is rotated with the rotating shaft 36 The transmission rod 41 is dynamically installed by reciprocatingly pulling the transmission rod 41 in the up and down directions and limiting the spring telescopic rod 32 by the transmission handle 31, so that when the transmission rod 41 moves, the spring telescopic rod 32 can be driven to move up and down through the second fixed plate group 35 and the rotating shaft 36 on the special-shaped plate 34, and then the transmission handle 31 can be piston-moved, so that each cylindrical jack 27 can be synchronously driven to rise at the same time to complete the rise of the support frame 28, so that the fragile parts of the tunnel can be supported more conveniently, and the practicality is further improved.

[0023] A fixing block 37 is fixedly installed at the lower end of the special-shaped plate 34, a circular groove 38 is opened inside the fixing block 37, a ball hinge 39 is arranged inside the circular groove 38, and a transmission rod 41 is fixedly installed on the circumferential surface of the ball hinge 39. By setting the ball hinge 39, after the staff moves the support frame 28 into place through the cylindrical jack 27, the staff can move the transmission rod 41 to any position by themselves through the damping force of the ball hinge 39, so as to avoid affecting the walking of the staff.

[0024] Working principle: In the first step, when the staff needs to support the vulnerable part of the tunnel, the staff can first set the tow rope between the hanging handle 25 on one side of the third L-shaped base 13, and connect the electric trailer with the tow rope. Then the staff can use the electric trailer to move the first L-shaped base 11 of the tunnel support device to the end of the vulnerable part of the tunnel. After the movement is completed, the staff releases the connection between the electric trailer and the tow rope and removes the tow rope from the hanging handle 25. In the second step, the staff can then rotate the worm 15 according to the overall length of the vulnerable part of the tunnel, so that the worm 15 rotates on the first fixed plate group 14 and meshes with the worm gear tooth group 19 on the arc-shaped member 18, so that the worm gear tooth group 19 generates a radial force to rotate as a whole, and then the arc-shaped member 18 drives the slider 23 and the slide bar 24 to slide in the slide groove 21 and the side groove 22 respectively. At the same time, the rotation of the worm gear tooth group 19 will generate a radial force on the transmission column 17, so that the transmission column 17 moves, so that the connecting rod of the scissor-type telescopic assembly 16 can be expanded, and then a radial force is generated to drive the second L-shaped base 12 and the third L The shaped base 13 moves to the side away from the first L-shaped base 11. At the same time, when the second L-shaped base 12 and the third L-shaped base 13 move, the universal wheel 26 will actively rub against the ground and rotate. At this time, the distances between the first L-shaped base 11, the second L-shaped base 12 and the third L-shaped base 13 will increase equidistantly. At the same time, the movement between the first L-shaped base 11, the second L-shaped base 12 and the third L-shaped base 13 will cause the worm gear tooth group 19 to actively stretch. When one side of the third L-shaped base 13 is located at the end of the vulnerable part of the tunnel, the first fixed plate group 14 can be stopped from rotating, thereby completing the coverage of the vulnerable part of the tunnel. In the third step, the staff can then pull the transmission rod 41 back and forth in the up and down directions, so that the transmission rod 41 drives each spring telescopic rod 32 (the spring telescopic rod 32 is a prior art, usually composed of a shell, a spring, and a piston rod) to move back and forth up and down through the fixed block 37 and the special-shaped plate 34, and then the transmission handle 31 can be rotated, so that the piston of the pump cylinder under the transmission handle 31 pressurizes the inside of the cylindrical jack 27. According to Pascal's principle, this pressure will be transmitted to the large piston of the cylindrical jack 27 through the hydraulic oil. Since the area of ​​the large piston is much larger than that of the small oil cylinder, the large piston will drive the output shaft to generate an upward force, so that the support frame 28 as a whole drives the telescopic shed 29 as a whole to move upward. When the support frame 28 can support the fragile parts of the tunnel, the transmission rod 41 can be stopped from being pulled up and down, thereby completing the work of supporting and protecting the fragile parts of the tunnel.

[0025] A working method of the tunnel support device for civil construction includes the following steps: When no support is performed, the first L-shaped base 11, the second L-shaped base 12 and the third L-shaped base 13 are in a retracted state through the scissor-type telescopic assembly 16; When it is necessary to support the vulnerable part of the tunnel, the worm 15 is rotated, and the worm 15 meshes with the worm gear teeth group 19 outside the two arc-shaped parts 18, generating radial force to rotate the worm gear teeth group 19 as a whole; The rotation of the worm gear tooth group 19 drives the transmission column 17 to move through the arc-shaped member 18, thereby driving the connecting rod of the scissor-type telescopic assembly 16 to expand; the expansion of the scissor-type telescopic assembly 16 causes the second L-shaped base 12 and the third L-shaped base 13 to move away from the first L-shaped base 11, thereby adjusting the support area according to the size of the vulnerable part of the tunnel; While the worm gear tooth set 19 rotates, the slider 23 and the slide bar 24 slide in the slide groove 21 and the side groove 22 respectively, providing additional limit and increasing the stability of the device during the expansion process; When the second L-shaped base 12 and the third L-shaped base 13 move to the desired position, the transmission rod 41 is pulled back and forth in the up and down directions; the transmission rod 41 drives the spring telescopic rod 32 to move back and forth up and down through the fixed block 37 and the special-shaped plate 34; the piston movement of the spring telescopic rod 32 causes the pump cylinder under the transmission handle 31 to pressurize the inside of the cylindrical jack 27; according to Pascal's principle, the large piston of the cylindrical jack 27 generates an upward force after being pressurized, pushing the support frame 28 and the telescopic shed 29 to rise as a whole, thereby supporting and reinforcing the vulnerable parts of the tunnel.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0027] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A tunnel support device for civil construction, characterized in that: It comprises a first L-shaped base (11), a second L-shaped base (12), and a third L-shaped base (13); A multifunctional structure is fixedly installed on the inner sides of the two first L-shaped bases (11); The multifunctional structure comprises a first fixed plate group (14), a worm (15) is rotatably mounted between the two first fixed plate groups (14), a scissor-type telescopic assembly (16) is arranged between the two first L-shaped bases (11), the second L-shaped base (12) and the third L-shaped base (13), a transmission column (17) is arranged on the side walls of the two scissor-type telescopic assemblies (16), the two transmission columns (17) are partially exposed outside the first L-shaped base (11), an arc-shaped member (18) is fixedly mounted on the circumferential surface of the two transmission columns (17), a worm gear tooth group (19) is arranged on the outer side of the two arc-shaped members (18), and the two worm gear tooth groups (19) are meshed with the worm (15).

2. A tunnel support device for civil construction as claimed in claim 1, characterized in that: A slide groove (21) is provided inside each of the two first L-shaped bases (11), side grooves (22) are symmetrically provided on the inner walls of the two slide grooves (21), and sliding blocks (23) are symmetrically fixedly mounted on the side walls of the two worm gear tooth groups (19).

3. A tunnel support device for civil construction as claimed in claim 2, characterized in that: A sliding bar (24) is symmetrically fixedly mounted on the surface of each of the sliding blocks (23); each of the sliding blocks (23) is located inside the sliding groove (21); and each of the sliding blocks (23) is slidably mounted with the sliding groove (21).

4. A tunnel support device for civil construction as claimed in claim 3, characterized in that: Each of the slide bars (24) is located inside the side groove (22), and each of the slide bars (24) is slidably mounted on the side groove (22). A hanging handle (25) is fixedly mounted on the surface of the two first L-shaped bases (11) and the third L-shaped base (13). Universal wheels (26) are provided at the lower ends of the two first L-shaped bases (11), the second L-shaped base (12), and the third L-shaped base (13).

5. A tunnel support device for civil construction as claimed in claim 4, characterized in that: The upper ends of the two first L-shaped bases (11), the second L-shaped base (12), and the third L-shaped base (13) are all fixedly mounted with cylindrical jacks (27), the output shafts of each cylindrical jack (27) are fixedly mounted with support frames (28) between each pair of output shafts, and the telescopic sheds (29) are threadedly mounted between each pair of support frames (28).

6. A tunnel support device for civil construction as claimed in claim 5, characterized in that: A transmission handle (31) is provided on the side wall of each cylindrical jack (27), and a spring telescopic rod (32) is fixedly installed inside each transmission handle (31).

7. A tunnel support device for civil construction as claimed in claim 6, characterized in that: A through slot (33) is provided through the piston of each of the spring telescopic rods (32), a special-shaped plate (34) is provided between each of the spring telescopic rods (32), and a plurality of second fixed plate groups (35) are fixedly mounted on the upper end of the special-shaped plate (34).

8. A tunnel support device for civil construction as claimed in claim 7, characterized in that: A rotating shaft (36) is fixedly mounted on the inner side of each second fixed plate group (35), and each through slot (33) is rotatably mounted on the rotating shaft (36).

9. A tunnel support device for civil construction as claimed in claim 8, characterized in that: A fixing block (37) is fixedly mounted on the lower end of the special-shaped plate (34), and a circular groove (38) is provided inside the fixing block (37).

10. A working method of the tunnel support device for civil construction according to any one of claims 1 to 9, characterized in that: These include: When no support is performed, the first L-shaped base (11), the second L-shaped base (12) and the third L-shaped base (13) are in a retracted state via the scissor-type telescopic assembly (16); When it is necessary to support the vulnerable part of the tunnel, the worm (15) is rotated, and the worm (15) meshes with the worm gear tooth group (19) on the outside of the two arc-shaped members (18), generating a radial force, so that the worm gear tooth group (19) rotates as a whole; The rotation of the worm gear tooth group (19) drives the transmission column (17) to move through the arc-shaped member (18), thereby driving the connecting rod of the scissor-type telescopic assembly (16) to expand; the expansion of the scissor-type telescopic assembly (16) causes the second L-shaped base (12) and the third L-shaped base (13) to move in a direction away from the first L-shaped base (11), thereby achieving adjustment of the support area according to the size of the vulnerable part of the tunnel; While the worm gear tooth set (19) rotates, the slider (23) and the slide bar (24) slide in the slide groove (21) and the side groove (22) respectively, providing additional limit and increasing the stability of the device during the expansion process; When the second L-shaped base (12) and the third L-shaped base (13) are moved to the desired position, the transmission rod (41) is pulled back and forth in the up and down directions; the transmission rod (41) drives the spring telescopic rod (32) to move back and forth in the up and down directions through the fixed block (37) and the special-shaped plate (34); the piston movement of the spring telescopic rod (32) causes the pump cylinder below the transmission handle (31) to pressurize the inside of the cylindrical jack (27); according to the Pascal principle, the large piston of the cylindrical jack (27) generates an upward force after being subjected to pressure, pushing the support frame (28) and the telescopic shed (29) to rise as a whole, thereby supporting and reinforcing the vulnerable parts of the tunnel.

Images