Folding tunnel steel arch quick splicing device and steel arch quick splicing method

Abstract

The invention discloses a folding type tunnel steel arch rapid splicing device and a steel arch rapid splicing method, and belongs to the technical field of tunnel construction. The folding type tunnel steel arch rapid splicing device is characterized by comprising an installation platform and electric lifting tables, the installation platform is of a rectangular frame structure, at least three electric lifting tables are correspondingly arranged on two opposite frame edges of the installation platform respectively, each electric lifting table comprises a fixed end and a movable end, and the fixed ends are connected with the movable ends. The fixed end of the electric lifting table is fixedly connected with the frame edge of the installation platform, an installation table top is fixed to the upper portion of the movable end of the electric lifting table, an obliquely-arranged connecting plate is fixed to the installation table top, and bolt holes are formed in the connecting plate. According to the rapid splicing device for the steel arches, the distance and the gradient between the multiple steel arches can be conveniently adjusted, and rapid splicing and welding of connecting ribs between the arch crown section, the arch waist section and the arch lower section of the multiple steel arches can be completed in a factory.

Description

Technical Field

[0001] The present invention relates to a foldable tunnel steel arch frame quick splicing device, which is mainly used for splicing tunnel steel arch frames. The present invention also relates to a method for quick splicing tunnel steel arch frames by using the foldable tunnel steel arch frame quick splicing device. Background Art

[0002] Tunnel construction in complex environments places higher demands on construction equipment and technology. The use of large-scale mechanized construction is an inevitable trend in the development of tunnel engineering. After tunnel excavation, in order to resist tunnel deformation, steel arch frames need to be erected quickly. As the main load-bearing structure, the erection speed of steel arch frames not only affects the progress of the project, but also directly affects the safety of the tunnel structure. The installation of steel arch frames is an essential part of tunnel construction, but at present, the installation of steel arch frames mostly uses on-site manual assembly, which cannot be assembled quickly.

[0003] In order to solve the problem of rapid assembly of tunnel steel arch frames, relevant experts and technicians have begun to propose solutions. For example, the Chinese patent with document number CN202221207576.1 proposes a steel arch frame installation device for large-section tunnels. By modifying the excavator, power arm and clamping structure, it is ensured that the steel arch frame will not slide off the fixed platform during the installation process, which is convenient for workers to install the arch frame at the designated position. However, the device requires the excavator to be modified, and the modification process is relatively complicated. In addition, prefabrication and assembly cannot be achieved, and the effect of shortening the process time is limited; the Chinese patent application with document number CN202210521488.7 proposes a tunnel initial support steel arch frame installation device. A loading device is installed on the basis of a traditional excavation gantry. The modification method is simple and the rapid lifting of a single arch frame is achieved. However, there are still deficiencies in the assembly of multiple steel arch frames. The steel bars between the multiple steel arch frames need to be welded on site, and factory prefabrication cannot be achieved. The requirements for manual assembly in a complex on-site environment are high and the time is long.

[0004] In summary, the current tunnel steel arch frame assembly devices have the following problems: (1) The steel arch frames need to be assembled manually on site, which takes a long time in complex environments and cannot be assembled quickly; (2) Some modified mechanized assembly devices can only quickly lift a single section of steel frame, but cannot quickly assemble multiple steel arch frames; (3) Most of the processes require on-site operation, which results in low construction efficiency. Summary of the invention

[0005] In view of the above-mentioned defects existing in the prior art, the present invention provides a foldable tunnel steel arch frame rapid splicing device suitable for rapid assembly of steel arch frames in a factory.

[0006] The present invention is achieved through the following technical scheme: a foldable tunnel steel arch frame rapid splicing device, characterized in that it includes an installation platform and an electric lifting platform, the installation platform is a rectangular frame structure, at least three electric lifting platforms are respectively arranged on two opposite frame edges of the installation platform, the electric lifting platform includes a fixed end and a movable end, the fixed end of the electric lifting platform is fixedly connected to the frame edge of the installation platform, the upper part of the movable end of the electric lifting platform is fixed with a mounting table, the mounting table is fixed with an inclined connecting plate, and bolt holes are arranged on the connecting plate.

[0007] In the present invention, the distance between the frame edges of the two electric lift platforms connected to the installation platform is adapted to the cross-sectional size of the tunnel steel arch frame, and the distance between two adjacent electric lift platforms on the frame edge of the installation platform is the same as the design spacing of two adjacent steel arch frames. The connecting plate on the installation table of the electric lift platform is used to connect with the steel arch frame to be assembled, and the electric lift platform can be raised and lowered. The slope between the steel arch frames can be adjusted by raising and lowering the electric lift platform to meet the design requirements.

[0008] Further, a plurality of electric lift platform fixing positions are arranged on the frame edge of the mounting platform connected to the electric lift platform. By selecting the fixing positions of the electric lift platform, the distance between the steel arches can be quickly adjusted.

[0009] The present invention also provides a foldable tunnel steel arch frame rapid splicing method, the technical scheme adopted is: a foldable tunnel steel arch frame rapid splicing method, the foldable tunnel steel arch frame includes an arch top section, two arch waist sections, and two arch lower sections, and is characterized by comprising the following steps:

[0010] (1) In a factory, the foldable tunnel steel arch frame quick splicing device described above is used to complete the welding of the connecting ribs of the arch crown section of multiple steel arch frames, the connecting ribs of the arch waist section of multiple steel arch frames, and the connecting ribs of the arch lower section of multiple steel arch frames: when welding the connecting ribs of the arch crown section of multiple steel arch frames, the fixed position and lifting height of the corresponding electric lifting platform are adjusted according to the spacing and slope of the steel arch frames to be assembled, and the two ends of the arch crown section of the multiple steel arch frames to be assembled are respectively fixedly connected to the connecting plates on the corresponding electric lifting platform, and then the connecting ribs between the steel arch frames are welded according to the designed spacing to complete the assembly of the arch crown section of the multiple steel arch frames; When welding the connecting ribs of the arch waist sections of multiple steel arch frames, the lower ends of the arch waist sections of the multiple steel arch frames to be assembled are respectively fixedly connected to the connecting plates on the corresponding electric lifting platforms, the lifting heights of the electric lifting platforms are checked, and then the connecting ribs between the steel arch frames are welded according to the designed spacing to complete the assembly of the arch waist sections of the multiple steel arch frames; when welding the connecting ribs of the arch lower sections of multiple steel arch frames, the lower ends of the arch lower sections of the multiple steel arch frames to be assembled are respectively fixedly connected to the connecting plates on the corresponding electric lifting platforms, the lifting heights of the electric lifting platforms are checked, and then the connecting ribs between the steel arch frames are welded according to the designed spacing to complete the assembly of the arch lower sections of the multiple steel arch frames;

[0011] (2) The two ends of each arch crown section of the assembled multiple steel arch frames are respectively hingedly connected to the corresponding single arch waist section of the assembled multiple steel arch frames through hinge axes to complete the pre-assembly of the three-section steel arch frame;

[0012] (3) The two waist sections of the pre-assembled three-section steel arch frame are folded toward the arch section respectively, and the folded three-section steel arch frame and the arch lower section of the pre-assembled multiple steel arch frames are transported to the working surface by using transportation equipment, and then erected by using a three-arm arch frame trolley. The middle arm of the three-arm arch frame trolley clamps the arch section of the multiple steel arch frames and lifts it to the arch position, and adjusts the position of the steel arch frame to be consistent with the tunnel slope. The two side arms of the three-arm arch frame trolley clamp the two waist sections respectively, unfold them, and dock them with the arch frame of the lifted arch section. The three sections of the steel arch frame are fixed by three mechanical arms, and the three sections of the steel arch frame are fixedly connected by bolts;

[0013] (4) The lower arch sections of the steel arch frames on both sides are supported and adjusted by using adjustable support pads, and are fixedly connected to the waist arch sections of the steel arch frames by using bolts, and the erection is completed; the adjustable support pads include a base plate, a first threaded rod vertically fixed to the base plate, a sleeve with an internal thread, and a support pad, the lower end of the sleeve is threadedly connected to the first threaded rod, a second threaded rod is vertically fixed to the bottom of the support pad, the second threaded rod is threadedly connected to the upper end of the sleeve, and an operating handle is fixed to the outside of the sleeve.

[0014] The beneficial effects of the present invention are as follows: (1) the foldable tunnel steel arch frame quick splicing device of the present invention has a simple structure, through which the spacing and slope adjustment between multiple steel arch frames can be conveniently realized, and the quick assembly and welding of the connecting ribs between the arch top section, arch waist section and arch lower section of multiple steel arch frames can be completed in the factory;

[0015] (2) By adopting the hinge axis, the circumferential pre-connection between the multiple sections of the steel frame in a single steel arch frame can be realized, and the single steel arch frame can be folded, which is convenient for transportation and can be quickly connected and fixed by bolts after being transported to the working surface, which can save a lot of time;

[0016] (3) With the on-site three-arm arch frame trolley, the position of multiple steel arch frames can be quickly fixed, and then with the adjustable support pad, the steel frame assembly of the lower section of multiple steel arch frames can be realized, and the erection process can be completed quickly and conveniently, realizing the mechanization and less-manpower of the erection;

[0017] (4) The present invention pre-assembles the top section, waist section and lower section of multiple steel arch frames in a factory, and then connects the pre-assembled steel arch frames on site. This steel arch frame splicing method has a fast splicing speed, can greatly reduce the workload of on-site assembly, reduce the difficulty of construction, and speed up the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the foldable tunnel steel arch frame rapid splicing device in the present invention;

[0019] Figure 2 is a side view of the mounting frame of the present invention;

[0020] Figure 3 It is a schematic diagram of the main view of the electric lifting platform in the present invention;

[0021] Figure 4 is a schematic top view of the electric lifting platform in the present invention;

[0022] Figure 5 is a side view schematic diagram of the electric lifting platform in the present invention;

[0023] Figure 6 It is a schematic diagram of the transmission structure of the electric lifting platform in the present invention;

[0024] Figure 7 yes Figure 6 AA cross-sectional view in FIG.

[0025] Figure 8 It is a schematic diagram of the structure of the adjustable support pad in the present invention;

[0026] Fig. 9 It is a schematic diagram of the assembly and connection of multiple steel arch vault sections;

[0027] Fig.10 It is a schematic diagram of the folding of the steel arch;

[0028] Fig.11 This is a schematic diagram of the splicing of multiple steel arch frames (arch crown section and two arch waist sections);

[0029] In the figure, 1, installation platform, 2, electric lifting platform, 3, adjustable support pad, 4, arch top section of steel arch frame, 5, hinge axis, 6, arch waist section of steel arch frame, 7, connecting ribs, 8, connecting plate of steel arch frame;

[0030] 1.1, bolt hole;

[0031] 2.1, installation table, 2.2, connecting plate, 2.3, column, 2.4, bolt hole, 2.5, motor reducer, 2.6, transmission shaft, 2.7, coupling, 2.8, turbine screw lift, 2.9, mounting frame, 2.10, mounting plate;

[0032] 2.3.1, the movable section of the column, 2.3.2, the fixed section of the column;

[0033] 2.8.1. The lifting screw of the turbine screw lift;

[0034] 3.1. Bottom plate, 3.2. First threaded rod, 3.3. Sleeve, 3.4. Second threaded rod, 3.5. Support pad, 3.6. Operating handle. DETAILED DESCRIPTION

[0035] The present invention will be further described below by way of non-limiting embodiments and in conjunction with the accompanying drawings:

[0036] As shown in the attached drawings, a foldable tunnel steel arch frame rapid splicing device includes a mounting platform 1 and an electric lifting platform 2. The mounting platform 1 is a rectangular frame structure made of I-beams, and at least three electric lifting platforms 2 are respectively arranged on two opposite frame edges of the mounting platform 1. The electric lifting platform 2 includes a fixed end and a movable end. The fixed end of the electric lifting platform 2 is fixedly connected to the frame edge of the mounting platform 1. The upper part of the movable end of the electric lifting platform 2 is fixed with a mounting table 2.1, and an inclined connecting plate 2.2 is fixed on the mounting table 2.1. The connecting plate 2.2 is provided with bolt holes 2.4. The lifting mechanism of the electric lifting platform 2 in the present invention is the prior art. The lifting mechanism used in this embodiment is a turbine screw lift. A hollow column 2.3 is arranged at each of the four corners of the lower part of the mounting table 2.1 of the electric lifting platform 2. Each column 2.3 includes a fixed section 2.3.2 at the lower part and a movable section 2.3.1 at the upper part. The movable section 2.3.1 is sleeved in the fixed section 2.3.2. The upper ends of the four movable sections 2.3.1 are fixedly connected to the mounting table 2.1. A set of turbine screw lifts 2.8 is arranged in each column 2.3. The fixed end of the turbine screw lift is fixed on the mounting frame 2.9. The mounting frame 2.9 is fixed in the fixed section 2.3.2 of the column 2.3. The upper end of the lifting screw 2.8.1 of the turbine screw lift is connected to the mounting table 2.1, and the other end is a movable end. Every two columns 2.3 use a motor reducer 2.5 to drive the internal worm screw lift 2.8. The motor reducer 2.5 is fixedly mounted on the mounting plate 2.10 between the two columns 2.3 and has a double output shaft. The two output shafts of the motor reducer 2.5 are connected to the input shaft of the worm screw lift 2.8 through the transmission shaft 2.6 and the coupling 2.7. The two motor reducers 2.5 can drive the movable ends of the four columns to be lifted and lowered. The side wall of the movable joint is provided with a strip groove to prevent interference with the mounting frame 2.9 and the input shaft of the worm screw lift. The worm screw lift 2.8 and the motor reducer 2.5 are both existing technologies and can be purchased from the market.

[0037] In order to facilitate the adjustment of the distance between the electric lift platforms 2, a plurality of electric lift platform fixing positions are provided on the frame edge of the mounting platform 1 connected to the electric lift platform 2. The mounting position of the electric lift platform 2 on the mounting frame can be selected as required. In this embodiment, the electric lift platform 2 is fixed to the frame edge of the mounting platform 1 by bolts, and a plurality of bolt holes 1.1 for connecting to the electric lift platform 2 are provided on the frame edge of the mounting platform 1.

[0038] The present invention also provides a method for quickly splicing a foldable tunnel steel arch frame. The foldable tunnel steel arch frame is connected by a plurality of steel arch frames through a plurality of connecting ribs 7. Each steel arch frame is divided into 5 sections, including an arch top section 4, two left and right arch waist sections 6, and two left and right arch bottom sections. The two arch waist sections 6 of each steel arch frame are respectively hinged to the two ends of the arch top section 4 through a hinge shaft 5. A connecting plate 8 is welded to the connecting end of each section of the steel arch frame. The hinge shaft 5 is connected to the connecting plate 8, and a bolt hole is provided on the connecting plate 8. The tooling used for the quick splicing of the steel arch frame includes the above-mentioned foldable tunnel steel arch frame quick splicing device and the adjustable support pad 3. The adjustable support pad 3 includes a base plate 3.1, a first threaded rod 3.2 vertically fixed on the base plate 3.1, a sleeve 3.3 with an internal thread, and a support pad 3.5. The lower end of the sleeve 3.3 is threadedly connected to the first threaded rod 3.2, a second threaded rod 3.4 is vertically fixed to the bottom of the support pad 3.5, and the second threaded rod 3.4 is threadedly connected to the upper end of the sleeve 3.3. Three operating handles 3.6 are fixed to the outside of the sleeve 3.3, and the support pad 3.5 can be height-adjusted by the operating handles 3.6.

[0039] The specific steps include:

[0040] (1) Design the arc shape and segment length of the arch frame according to the design drawing, and process the single-section steel arch frame of the required size;

[0041] (2) In the factory, the foldable tunnel steel arch frame quick splicing device described above is used to respectively complete the welding of the connecting ribs of the arch crown section of multiple steel arch frames, the connecting ribs of the arch waist section of multiple steel arch frames, and the connecting ribs of the arch lower section of multiple steel arch frames: when welding the connecting ribs of the arch crown section of multiple steel arch frames, the fixed position and lifting height of the corresponding electric lifting platform 2 are adjusted according to the spacing and slope of the steel arch frames to be assembled, and the two ends of the arch crown section of the multiple steel arch frames to be assembled are respectively fixedly connected to the corresponding connecting plates 2.2 on the electric lifting platform 2, and then the connecting ribs between the steel arch frames are welded according to the designed spacing to complete the assembly of the arch crown section of multiple steel arch frames; When welding the connecting ribs of the arch waist section of a steel arch frame, the lower ends of the arch waist sections of the multiple steel arch frames to be assembled are respectively fixedly connected to the connecting plates 2.2 on the corresponding electric lifting platforms 2, and the lifting heights of the electric lifting platforms 2 are checked. Then, the connecting ribs between the steel arch frames are welded according to the designed spacing to complete the assembly of the arch waist sections of the multiple steel arch frames; when welding the connecting ribs of the arch lower sections of the multiple steel arch frames, the lower ends of the arch lower sections of the multiple steel arch frames to be assembled are respectively fixedly connected to the connecting plates 2.2 on the corresponding electric lifting platforms 2, and the lifting heights of the electric lifting platforms are checked. Then, the connecting ribs between the steel arch frames are welded according to the designed spacing to complete the assembly of the arch lower sections of the multiple steel arch frames;

[0042] (2) The two ends of each arch top section of the assembled multiple steel arch frames are respectively hingedly connected to the corresponding single arch waist section of the assembled multiple steel arch frames through the hinge shaft 5 to complete the pre-assembly of the three-section steel arch frame;

[0043] (3) The two waist sections of the pre-assembled three-section steel arch frame are folded toward the arch section respectively, and the folded three-section steel arch frame and the arch lower section of the pre-assembled multiple steel arch frames are transported to the working surface by using transportation equipment, and then erected by using a three-arm arch frame trolley. The middle arm of the three-arm arch frame trolley clamps the arch section of the multiple steel arch frames and lifts it to the arch position, and adjusts the position of the steel arch frame to be consistent with the tunnel slope. The two side arms of the three-arm arch frame trolley clamp the two waist sections respectively, unfold them, and dock them with the arch frame of the lifted arch section. The three sections of the steel arch frame are fixed by three mechanical arms, and the three sections of the steel arch frame are fixedly connected by bolts;

[0044] (4) The lower arch sections of the steel arch frames on both sides are supported by adjustable support pads, and the lower arch sections are adjusted by the adjustable support pads so that they are docked with the waist section of the steel arch frame, and fixedly connected with the waist section of the steel arch frame by bolts, and the erection is completed.

[0045] The three-arm arch trolley used in the present invention is a prior art.

[0046] The other parts of this embodiment are all prior art and will not be described in detail here.

Claims

1. A foldable tunnel steel arch quick splicing device, characterized by: It includes an installation platform and an electric lifting platform. The installation platform is a rectangular frame structure. At least three electric lifting platforms are respectively arranged on two opposite frame edges of the installation platform. The electric lifting platform includes a fixed end and a movable end. The fixed end of the electric lifting platform is fixedly connected to the frame edge of the installation platform. The upper part of the movable end of the electric lifting platform is fixed with a mounting table surface, and an inclined connecting plate is fixed on the mounting table surface, and bolt holes are arranged on the connecting plate.

2. The foldable tunnel steel arch quick splicing device according to claim 1 is characterized by: A plurality of electric lift platform fixing positions are arranged on the frame edge of the mounting platform connected to the electric lift platform.

3. A method for quickly splicing a foldable tunnel steel arch frame, wherein the foldable tunnel steel arch frame comprises an arch top section, two arch waist sections, and two arch lower sections, and is characterized by: The steps include: (1) In a factory, the foldable tunnel steel arch frame rapid splicing device described in any one of claims 1-2 is used to complete the welding of the connecting ribs of the arch crown section of multiple steel arch frames, the connecting ribs of the arch waist section of multiple steel arch frames, and the connecting ribs of the arch lower section of multiple steel arch frames: when welding the connecting ribs of the arch crown section of multiple steel arch frames, the fixed position and lifting height of the corresponding electric lifting platform are adjusted according to the spacing and slope of the steel arch frames to be assembled, and the two ends of the arch crown section of the multiple steel arch frames to be assembled are respectively fixedly connected to the connecting plates on the corresponding electric lifting platform, and then the connecting ribs between the steel arch frames are welded according to the designed spacing to complete the arch crown section of the multiple steel arch frames. Assembly of the arch waist sections of multiple steel arch frames; when welding the connecting ribs of the arch waist sections of multiple steel arch frames, the lower ends of the arch waist sections of the multiple steel arch frames to be assembled are respectively fixedly connected to the connecting plates on the corresponding electric lifting platforms, the lifting heights of each electric lifting platform are checked, and then the connecting ribs between the steel arch frames are welded according to the designed spacing to complete the assembly of the arch waist sections of multiple steel arch frames; when welding the connecting ribs of the arch lower sections of multiple steel arch frames, the lower ends of the arch lower sections of multiple steel arch frames to be assembled are respectively fixedly connected to the connecting plates on the corresponding electric lifting platforms, the lifting heights of each electric lifting platform are checked, and then the connecting ribs between the steel arch frames are welded according to the designed spacing to complete the assembly of the arch lower sections of multiple steel arch frames; (2) The two ends of each arch crown section of the assembled multiple steel arch frames are respectively hingedly connected to the corresponding single arch waist section of the assembled multiple steel arch frames through hinge axes to complete the pre-assembly of the three-section steel arch frame; (3) The two waist sections of the pre-assembled three-section steel arch frame are folded toward the arch section respectively, and the folded three-section steel arch frame and the arch lower section of the pre-assembled multiple steel arch frames are transported to the working surface by using transportation equipment, and then erected by using a three-arm arch frame trolley. The middle arm of the three-arm arch frame trolley clamps the arch section of the multiple steel arch frames and lifts it to the arch position, and adjusts the position of the steel arch frame to be consistent with the tunnel slope. The two side arms of the three-arm arch frame trolley clamp the two waist sections respectively, unfold them, and dock them with the arch frame of the lifted arch section. The three sections of the steel arch frame are fixed by three mechanical arms, and the three sections of the steel arch frame are fixedly connected by bolts; (4) The lower arch sections of the steel arch frames on both sides are supported and adjusted by using adjustable support pads, and are fixedly connected to the waist arch sections of the steel arch frames by using bolts, and the erection is completed; the adjustable support pads include a base plate, a first threaded rod vertically fixed to the base plate, a sleeve with an internal thread, and a support pad, the lower end of the sleeve is threadedly connected to the first threaded rod, a second threaded rod is vertically fixed to the bottom of the support pad, the second threaded rod is threadedly connected to the upper end of the sleeve, and an operating handle is fixed to the outside of the sleeve.

Images