Suspension bridge steel box girder construction system and side span sling-free girder section construction method

Abstract

The invention belongs to the technical field of bridge construction, and particularly relates to a suspension bridge steel box girder construction system and a side span sling-free girder section construction method. The device at least comprises a main cable, a catwalk, a permanent cable clamp, a permanent sling, a double-limb tower column, a beam moving support and a tower area support. A plurality of permanent cable clamps are arranged, and the plurality of permanent cable clamps are connected to the main cable; the permanent cable clamp on the middle span is connected with a permanent sling; a catwalk is arranged along the main cable; the beam moving support and the tower area support are connected to the double-limb tower column. The device further comprises three sets of swing shifting devices and a plurality of sets of temporary slings. Wherein two sets of swinging and moving devices are connected to a main cable of a middle span, and the other set of swinging and moving device is connected to a main cable of a side span and used for swinging and moving hoisting of a steel box girder; and the top end of each set of temporary sling is connected with a permanent cable clamp on a side span main cable, is used for mounting a side span steel box girder, and is dismounted after the side span steel box girder is mounted. The beam storage problem of the sling-free beam section is effectively solved, the process is simple, the construction efficiency is high, and the cost is low.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a suspension bridge steel box girder construction system and a side span non-hanger girder section construction method. Background Art

[0002] The steel box girder of a suspension bridge is usually hoisted using a cable-span crane, but the structure of the cable-span crane is relatively complex and the construction cost is high.

[0003] During the actual construction, the steel box girders without cables of suspension bridges are generally temporarily stored on supports. However, when there are many beam sections without cables and the installation height is high, the investment in temporary supports is large, the construction is complex, the safety risks are greater, the construction cost is high, and there is a problem of storing beams without cables. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a suspension bridge steel box girder construction system and a side span non-hanger beam section construction method.

[0005] The technical solution adopted by the present invention is: A suspension bridge steel box girder construction system at least includes a main cable, a catwalk, a permanent cable clamp, a permanent sling, a double-limb tower column, a beam shifting bracket and a tower area bracket; the permanent cable clamps are provided in plurality, and the plurality of permanent cable clamps are all connected to the main cable; the permanent cable clamps on the middle span are connected to the permanent sling; a catwalk is provided along the main cable; the beam shifting bracket and the tower area bracket are respectively connected to the double-limb tower column; the system also includes three sets of swinging devices and multiple sets of temporary slings; two sets of swinging devices are connected to the main cable of the middle span, and the other set of swinging devices is connected to the main cable of the side span, and is used for swinging and lifting the steel box girder; the top end of each set of temporary slings is connected to the permanent cable clamp on the main cable of the side span, and is used for installing the side span steel box girder, and all temporary slings are removed after the installation of the side span steel box girder is completed.

[0006] The swinging device includes a temporary cable clamp, hydraulic equipment, a steel strand and an anchor mechanism; one end of the steel strand is connected to the hydraulic equipment, and the other end of the steel strand is connected to the anchor mechanism through the hydraulic equipment; the top of the hydraulic equipment is connected to the temporary cable clamp.

[0007] The hydraulic equipment includes an installation cylinder, a through-hole jack, a rope storage mechanism and a hydraulic pump station; the installation cylinder is vertically arranged, and a through-hole jack is connected to the inside thereof; the rope storage mechanism is connected to the outer wall of the installation cylinder; one end of the steel strand is wound in the rope storage mechanism, and the other end of the steel strand is extended to the outside of the bottom of the installation cylinder through the installation cylinder and the through-hole jack and then connected to the anchor head; the hydraulic pump station is connected to the through-hole jack and is used to control the through-hole jack to retract and release the steel strand.

[0008] The rope storage mechanism includes a connecting frame, a rope storage drum and a bunching plate; the connecting frame is a frame structure, which is connected to the outer side wall of the mounting tube; the rope storage drum is connected inside the connecting frame and is used for winding the steel strand; the bunching plate is connected to the top of the connecting frame and is used for guiding the steel strand.

[0009] It also includes a suspension arm mechanism; the suspension arm mechanism is connected to the top of the installation tube, and the installation tube is connected to the temporary cable clamp through the suspension arm mechanism.

[0010] The boom mechanism includes a boom, a lower pin shaft and an upper pin shaft; the boom is a rectangular plate structure with connecting pin holes at both ends; the upper end of the boom is connected to a temporary cable clamp through the upper pin shaft, and the lower end of the boom is connected to a mounting tube through the lower pin shaft.

[0011] The mounting tube is open at the bottom and has a hollow structure, and a first connecting piece for connecting to the boom mechanism is fixedly connected to the top of the mounting tube; a through hole for the steel strand to pass through is opened on the upper outer wall of the mounting tube; a second connecting piece for connecting to the rope storage mechanism is connected to the outer wall of the mounting tube facing the rope storage mechanism; a guide tube is arranged on the outer side of the through hole for the steel strand to pass through on the upper outer wall of the mounting tube, tilted upward.

[0012] The anchor head mechanism comprises an anchor head and an anchor plate; the anchor plate is connected to the upper end of the anchor head; and the anchor plate is used for connection with the steel strand.

[0013] The temporary sling includes an ear plate, a connecting sleeve, an adjusting screw, an anchor cup and a steel wire rope; the two ends of the steel wire rope are respectively connected with an anchor cup, an adjusting screw, a connecting sleeve and an ear plate in sequence from the end to the outside; the ear plate is a rectangular plate with a pin hole on one side of the rectangular plate; the connecting sleeve and the adjusting screw, as well as the adjusting screw and the anchor cup are threadedly connected; the inner side wall of one end of the connecting sleeve is provided with a thread matching the adjusting screw; one end of the anchor cup is provided with a connecting cavity for connecting with the adjusting screw, and the inner side wall of the connecting cavity is provided with a thread matching the adjusting screw.

[0014] A method for constructing a suspension bridge steel box girder side span non-hanger beam section adopts a suspension bridge steel box girder construction system, comprising the following steps: Step 1: Install three sets of swinging devices from the middle span to the side span, numbered as the first swinging device, the second swinging device, and the third swinging device; the top of each swinging device is fixed on the main cable, the bottom of the swinging device is connected to the porous plate, and the porous plate is connected to the sling; Step 2: transport the steel box girder to the bottom of the first swinging device, and connect and fix the hanger to the steel box girder; Step 3: Start the first swinging device to lift the steel box girder to a preset height; Step 4: Connect the lower end of the second swing device to the porous plate; Step 5: Swing and move the steel box girder to the bottom of the second swing and move device, and then remove the lower end of the first swing and move device from the perforated plate; Step 6: Use the winch installed on the side span site to pull the steel box girder horizontally onto the beam shifting bracket, and then remove the lower end of the second swing shifting device from the perforated plate; Step 7: Use the winch to make the steel box girder slide longitudinally on the beam shifting bracket, pass through between the double-limb tower columns, and move longitudinally to the bottom of the designed position; Step 8: Use the third swinging device to hoist the steel box girder to the setting position, install temporary slings on the steel box girder of the side span, and fix the temporary slings on the permanent cable clamps of the side span; Step 9: Use the same construction process to hoist other steel box girders. The steel box girders without slings in the tower area are stored on the tower area brackets. Temporary slings are installed on the steel box girders in the side spans. The temporary slings are connected to the permanent slings of the main cables of the side spans. Permanent slings are installed on the steel box girders in the middle spans. The permanent slings are fixed on the permanent cable clamps until all the steel box girders are installed. Step 10: Adjust the line shape of all steel box girders, weld the circumferential welds of adjacent steel box girders, and hoist the flange plates of the side span steel box girders into place and weld them into a whole with the steel box girders; Step 11: Adjust the temporary slings so that they are no longer under stress, and then remove the temporary slings to complete the installation of the steel box girder.

[0015] Beneficial effects: The present invention at least includes a main cable, a catwalk, a permanent cable clamp, a permanent sling, a double-limb tower column, a beam-shifting bracket and a tower area bracket; multiple permanent cable clamps are provided, and multiple permanent cable clamps are connected to the main cable; the permanent cable clamp on the middle span is connected to a permanent sling; a catwalk is provided along the main cable; the beam-shifting bracket and the tower area bracket are respectively connected to the double-limb tower column; it also includes three sets of swinging devices and multiple sets of temporary slings; two sets of swinging devices are connected to the main cable of the middle span, and the other set of swinging devices is connected to the main cable of the side span, which is used for swinging and lifting of steel box girders; the top of each set of temporary slings is connected to the permanent cable clamp on the main cable of the side span, which is used for the installation of the side span steel box girder, and all temporary slings are removed after the installation of the side span steel box girder is completed. The present invention can effectively solve the problem of beam storage in beam sections without slings, the temporary slings and swinging devices used are simple in structure, safe and reliable, the temporary slings are easy to disassemble, the construction process is relatively simple, the construction efficiency is high, and the construction cost is low, which can provide a useful reference for other similar engineering construction.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The use status of the present invention is shown in FIG. Figure 1 .

[0019] Figure 2 It is a schematic diagram of the structure of the swing device in the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the hydraulic equipment in the swing device of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the temporary sling in the present invention.

[0022] Figure 5 It is a structural schematic diagram of the anchor head mechanism in the present invention.

[0023] Figure 6 The present invention is used in a state diagram Figure 2 .

[0024] Figure 7 The present invention is used in a state diagram Figure 3 .

[0025] Figure 8 The present invention is used in a state diagram Figure 4 .

[0026] Fig. 9 The present invention is used in a state diagram Figure 5 .

[0027] Fig.10 The present invention is used in a state diagram Figure 6 .

[0028] Fig.11 The present invention is used in a state diagram Figure 7 .

[0029] Fig.12 The present invention is used in a state diagram Figure 8 .

[0030] Fig.13 This is a schematic diagram of the state after the temporary sling is removed according to the present invention.

[0031] In the figure: 1. temporary cable clamp; 2. main cable; 3. hydraulic equipment; 4. steel strand; 5. anchor head; 6. catwalk; 7. perforated plate; 8. sling; 9. steel box girder; 10. double-limb tower column; 11. beam shifting bracket; 12. winch; 13. temporary sling; 14. permanent sling; 15. permanent cable clamp; 16. tower bracket; 17. anchor plate; 301. installation cylinder; 302. through-hole jack; 303. rope storage drum; 304. boom; 305. lower pin shaft; 306. upper pin shaft; 307. sparse plate; 308. hydraulic pump station; 309. guide pipe; 131. ear plate; 132. connecting sleeve; 133. adjusting screw; 134. anchor cup; 135. wire rope. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1: according to Figure 1-Figure 13 A suspension bridge steel box girder construction system shown in the figure comprises at least a main cable 2, a catwalk 6, a permanent cable clamp 15, a permanent sling 14, a double-limb tower column 10, a beam shifting bracket 11 and a tower area bracket 16; a plurality of permanent cable clamps 15 are provided, and the plurality of permanent cable clamps 15 are all connected to the main cable 2; the permanent cable clamp 15 on the middle span is connected to the permanent sling 14; a catwalk 6 is provided along the main cable 2; the beam shifting bracket 11 and the tower area bracket 16 are respectively connected to the double-limb tower column 10; it also comprises three sets of swinging devices and multiple sets of temporary slings 13; two sets of swinging devices are connected to the main cable 2 of the middle span, and the other set of swinging devices is connected to the main cable 2 of the side span, and is used for swinging and lifting the steel box girder 9; the top end of each set of temporary slings 13 is connected to the permanent cable clamp 15 on the side span main cable 2, and is used for the installation of the side span steel box girder 9, and all temporary slings 13 are removed after the installation of the side span steel box girder 9 is completed.

[0034] In actual use, first install three sets of swinging and moving devices from the middle span to the side span, numbered in sequence as the first swinging and moving device, the second swinging and moving device, and the third swinging and moving device; the top of each set of swinging and moving devices is fixed on the main cable 2, the bottom end of the swinging and moving device is connected to the porous plate 7, and the porous plate 7 is connected to the sling 8; transport the steel box girder 9 to the bottom of the first swinging and moving device, and connect and fix the sling 8 to the steel box girder 9; start the first swinging and moving device to lift the steel box girder 9 to a preset height; then, pull and connect the lower end of the second swinging and moving device to the porous plate 7; then swing and move the steel box girder 9 to the bottom of the second swinging and moving device, and then remove the lower end of the first swinging and moving device from the porous plate 7; use the winch 12 set on the side span site to horizontally pull the steel box girder 9 to the beam shifting bracket 11, and then remove the lower end of the second swinging and moving device from the porous plate 7; then use the winch 12 to make the steel box girder 9 slide longitudinally on the beam shifting bracket 11, and then remove the lower end of the second swinging and moving device from the porous plate 7. 10, and longitudinally moved to the lower side of the designed position; the steel box girder 9 is hoisted to the setting position by using the third swinging device, and the steel box girder 9 of the side span is installed with a temporary sling 13, and the temporary sling 13 is fixed on the permanent cable clamp 15 of the side span; the same construction process is used to hoist the other steel box girders 9, the steel box girder 9 without slings in the tower area is stored on the tower area bracket 16, and the temporary sling 13 is installed on the steel box girder 9 of the side span, and the temporary sling 13 is connected to the permanent sling 14 of the main cable 2 of the side span On top; install permanent slings 14 on the steel box girder 9 of the middle span, and the permanent slings 14 are fixed on the permanent cable clamps 15 until all the steel box girders are installed; then, adjust the linear shapes of all the steel box girders 9, weld the circumferential welds of adjacent steel box girders 9, and hoist the flange plates of the side span steel box girders 9 into place and weld them into a whole with the steel box girder 9; adjust the temporary slings 13 so that the temporary slings 13 are no longer stressed, and then complete the removal of the temporary slings 13, and the installation construction of the steel box girder is completed.

[0035] The present invention can effectively solve the problem of beam storage in beam sections without slings. The temporary slings and swinging devices used are simple in structure, safe and reliable. The temporary slings are easy to disassemble. The construction process is relatively simple, the construction efficiency is high, and the construction cost is low. It can provide a useful reference for other similar engineering constructions.

[0036] Embodiment 2: according to Figure 1-Figure 3 , Figure 5-Figure 13 The suspension bridge steel box girder construction system shown is different from the first embodiment in that the swing device includes a temporary cable clamp 1, a hydraulic device 3, a steel strand 4 and an anchor head mechanism; one end of the steel strand 4 is connected to the hydraulic device 3, and the other end of the steel strand 4 is connected to the anchor head mechanism through the hydraulic device 3; the top of the hydraulic device 3 is connected to the temporary cable clamp 1.

[0037] Furthermore, in some embodiments, the hydraulic equipment 3 includes a mounting cylinder 301, a through-hole jack 302, a rope storage mechanism and a hydraulic pump station 308; the mounting cylinder 301 is vertically arranged, and a through-hole jack 302 is connected to the inside thereof; the rope storage mechanism is connected to the outer wall of the mounting cylinder 301; one end of the steel strand 4 is wound in the rope storage mechanism, and the other end of the steel strand 4 extends to the outside of the bottom of the mounting cylinder 301 through the mounting cylinder 301 and the through-hole jack 302 and is connected to the anchor head 5; the hydraulic pump station 308 is connected to the through-hole jack 302, and is used to control the through-hole jack 302 to retract and release the steel strand 4.

[0038] In actual use, three sets of hydraulic equipment 3 are provided, and the three sets of hydraulic equipment 3 are numbered as the first hydraulic equipment, the second hydraulic equipment, and the third hydraulic equipment in order from the middle span to the side span. Each set of hydraulic equipment is fixed to the main cable 2 through a temporary cable clamp 1, and the upper part of the steel strand 4 is anchored at the through-hole jack 302 in the hydraulic equipment 3, and the lower part of the steel strand 4 is fixed to the anchor head mechanism. The hydraulic pump station 308 of the hydraulic equipment 3 is placed on the surface layer of the catwalk 6. The porous plate 7 is connected to the end of the anchor head 5, and the anchor head 5 is connected to the sling 8 through the porous plate 7. Afterwards, the steel box girder 9 is transported to the lower part of the first hydraulic equipment, and the sling 8 connected to the lower part is connected and fixed to the steel box girder 9. The first hydraulic equipment is started to lift the steel box girder 9 to a certain height. Afterwards, the anchor head mechanism under the second hydraulic equipment is pulled and connected to the porous plate 7 on it. Subsequently, the steel box girder 9 is swung to the lower part of the second hydraulic equipment, and then the anchor head 5 under the first hydraulic equipment is removed from the porous plate 7. Afterwards, the steel box girder 9 is horizontally pulled to the beam shifting bracket 11 connected to the double-limb tower column 10 by the winch 12, and then the anchor head 5 under the second hydraulic equipment is removed from the porous plate 7, thereby completing the swinging of the steel box girder 9 simply and quickly. The steel box girder 9 is longitudinally slid on the beam shifting bracket 11 by the winch 12, and passes through the double-limb tower columns 10 and moves longitudinally to the bottom of the designed position. Since the total width of the steel box girder 9 is larger than the spacing between the double-limb tower columns 10, the flange plates at both ends can be temporarily not welded when the steel box girder 9 is processed, and welding can be performed after it is hoisted into place. The steel box girder 9 is hoisted to the setting position by the third hydraulic equipment.

[0039] In some embodiments, the rope storage mechanism includes a connecting frame, a rope storage drum 303 and a bunching plate 307; the connecting frame is a frame structure, which is connected to the outer wall of the mounting tube 301; the rope storage drum 303 is connected in the connecting frame for winding the steel strand 4; the bunching plate 307 is connected to the top of the connecting frame for guiding the steel strand 4.

[0040] In specific application, the upper end of the steel strand 4 is anchored by the clip in the through-core jack 302. After passing through the through-core jack 302, the upper end of the steel strand 4 bypasses the bunching plate 307 and is stored in the rope storage drum 303. The bunching plate 307 is used to comb the steel strand 4, effectively preventing the steel strand 4 from being twisted, and ensuring the safety of construction. The lower end of the steel strand 4 is fixed on the anchor plate 13 of the anchor head 5.

[0041] Embodiment three: according to Figure 1-Figure 5 The suspension bridge steel box girder construction system shown is different from the second embodiment in that the boom mechanism is connected to the top of the installation cylinder 301, and the installation cylinder 301 is connected to the temporary cable clamp 1 through the boom mechanism.

[0042] Furthermore, the boom mechanism includes a boom 304, a lower pin 305 and an upper pin 306; the boom 304 is a rectangular plate-like structure, with connecting pin holes at both ends; the upper end of the boom 304 is connected to the temporary cable clamp 1 through the upper pin 306, and the lower end of the boom 304 is connected to the mounting tube 301 through the lower pin 305.

[0043] In actual use, the boom 304 is connected to the temporary cable clamp 1 through the upper pin 306, and the installation tube 301 is connected to the boom 304 through the lower pin 305. After the boom 304 is removed, the length of the swing construction device 16 can be shortened, and it is used for hoisting steel box girders 9 with a smaller hoisting height.

[0044] Embodiment 4: according to Figure 3 The steel box girder construction system for a suspension bridge shown in the figure is different from the second embodiment in that the installation cylinder 301 is an open lower part and a hollow structure, and a first connecting piece for connecting to the boom mechanism is fixedly connected to the top of the installation cylinder 301; a through hole for the steel strand 4 to pass through is opened on the upper outer wall of the installation cylinder 301; a second connecting piece for connecting to the rope storage mechanism is connected to the outer wall of the installation cylinder 301 facing the rope storage mechanism; a guide tube 309 is arranged on the outer side of the through hole for the steel strand 4 to pass through on the upper outer wall of the installation cylinder 301, and is inclined upward.

[0045] In actual use, the installation cylinder 301 adopts the above technical solution to smoothly and safely retract and release the steel strand 4; the setting of the guide tube 309 makes the steel strand 4 enter and exit the installation cylinder 301 more smoothly.

[0046] Embodiment five: according to Figure 1-Figure 3 , Figure 5 The suspension bridge steel box girder construction system shown is different from the first embodiment in that the anchor head mechanism includes an anchor head 5 and an anchor plate 17; the anchor plate 17 is connected to the upper end of the anchor head 5; and the anchor plate 17 is used for connection with the steel strand 4.

[0047] The anchor plate 17 in this embodiment adopts the existing technology.

[0048] In actual use, the bottom end of the steel strand 4 is fixed on the anchor plate 17 of the anchor head mechanism, and the upper end of the steel strand 4 is anchored by the clip in the through-core jack 302. After passing through the through-core jack 302, the upper end of the steel strand 4 bypasses the bundle-splitting plate 307 and is stored in the rope storage drum 303. The bundle-splitting plate 307 is used to comb the steel strand 4 to prevent the steel strand 4 from being twisted. The through-core jack 302 is controlled by the hydraulic pump station 308, and the steel strand 4 is retracted and released by controlling the through-core jack 302, so as to facilitate the lifting of the steel box girder 9.

[0049] Embodiment six: according to Figure 4 , Fig.12 and Fig.13 The steel box girder construction system for a suspension bridge shown in the figure is different from the first embodiment in that the temporary sling 13 includes an ear plate 131, a connecting sleeve 132, an adjusting screw 133, an anchor cup 134 and a steel wire rope 135; the two ends of the steel wire rope 135 are respectively connected with an anchor cup 134, an adjusting screw 133, a connecting sleeve 132 and an ear plate 131 in sequence from the end to the outside; the ear plate 131 is a rectangular plate with a pin hole on one side of the rectangular plate; the connecting sleeve 132 and the adjusting screw 133, as well as the adjusting screw 133 and the anchor cup 134 are threadedly connected; the inner side wall of one end of the connecting sleeve 132 is provided with a thread matching the adjusting screw 133; one end of the anchor cup 134 is provided with a connecting cavity for connecting with the adjusting screw 133, and the inner side wall of the connecting cavity is provided with a thread matching the adjusting screw 133.

[0050] In actual use, the temporary sling 13 is connected to the permanent lifting lug on the steel box girder 9 to be lifted through the lug plate 131 through the pin shaft; then safe lifting can be carried out. The temporary sling 13 has a simple structure, is safe and reliable, is easy to disassemble, has a relatively simple construction process, high construction efficiency, and low construction cost.

[0051] In some embodiments, one side of the ear plate 131 is cut into an arc shape to avoid stress concentration during construction.

[0052] In this embodiment, the anchor cup 134 and the steel wire rope 135 are connected and fixed by casting. Both ends of the adjusting screw rod 133 are provided with positive and negative threads.

[0053] In actual use, during the hoisting stage of the steel box girder 9, the hoisting equipment is used to hoist the non-cable beam section to the designed position, and then one end of the temporary sling 13 is connected to the non-cable beam section by a pin through the pin hole on the ear plate 131, and it is suspended in the air, without the need to set up a temporary beam storage bracket; the other end of the temporary sling 13 is connected to the straddle-type permanent cable clamp 15 connected to the main cable 2 by a pin through the pin hole on the ear plate 131, and then the hoisting begins. When the steel box girder 9 of the suspension bridge is completely hoisted and welded, the total length of the temporary sling 13 is lengthened by screwing the adjusting screw 133, so that the temporary sling 13 is gradually no longer stressed, until the adjusting screw 133 is screwed out, the temporary sling 13 is removed, and the suspension system conversion is completed. After the bridge is completed, the temporary sling 13 is removed.

[0054] In specific applications, the connecting sleeve 132 adopts the above technical solution, and can conveniently adjust the total length of the temporary sling that is easy to disassemble by screwing, thereby ensuring that the lifting work can be carried out safely, steadily and smoothly.

[0055] Embodiment seven: according to Figure 1-Figure 13 The method for constructing a suspension bridge steel box girder side span non-hanger beam section shown in the figure adopts a suspension bridge steel box girder construction system, comprising the following steps: Step 1: Install three sets of swinging devices from the middle span to the side span, numbered as the first swinging device, the second swinging device, and the third swinging device; the top of the hydraulic equipment 3 in each swinging device is fixed to the main cable 2 through a temporary cable clamp 1, the top of the steel strand 4 is anchored to the through-hole jack 302 in the hydraulic equipment 3, and the bottom of the steel strand 4 is fixed to the anchor plate 17 in the anchor head mechanism; the hydraulic pump station 308 of the hydraulic equipment 3 is placed on the surface layer of the catwalk 6; the anchor head 5 is connected to the sling 8 through a porous plate 7; Step 2: transport the steel box girder 9 to the bottom of the first swinging device, and connect and fix the sling 8 to the steel box girder 9; Step 3: Start the first swinging device to lift the steel box girder 9 to a preset height; Step 4: Connect the lower end of the second swing device to the porous plate 7 by traction; Step 5: Swing and move the steel box girder 9 to the bottom of the second swing and move device, and then remove the lower end of the first swing and move device from the porous plate 7; Step 6: Use the winch 12 set on the side span site to horizontally pull the steel box beam 9 onto the beam shifting bracket 11, and then remove the lower end of the second swing shifting device from the porous plate 7; Step 7: Use the winch 12 to make the steel box girder 9 slide longitudinally on the beam shifting bracket 11, pass through between the double-limb tower columns 10, and move longitudinally to the bottom of the designed position; since the total width of the steel box girder 9 is larger than the spacing between the double-limb tower columns 10, the flange plates at both ends may not be welded during the processing of the steel box girder 9, and welding will be performed after it is hoisted in place; Step 8: Use the third swinging device to hoist the steel box girder 9 to the installation position, install the temporary sling 13 on the steel box girder 9 of the side span, and fix the temporary sling 13 on the permanent cable clamp 15 of the side span; Step 9: Use the same construction process to carry out the hoisting construction of other steel box girders 9. The steel box girders 9 without slings in the tower area are stored on the tower area bracket 16. Temporary slings 13 are installed on the steel box girders 9 in the side spans. The temporary slings 13 are connected to the permanent slings 14 of the main cables 2 in the side spans. Permanent slings 14 are installed on the steel box girders 9 in the middle spans. The permanent slings 14 are fixed on the permanent cable clamps 15 until all the steel box girders are installed. Step 10: Adjust the line shape of all steel box girders 9, weld the circumferential welds of adjacent steel box girders 9, and hoist the flange plates of the side span steel box girders 9 into place and weld them into a whole with the steel box girders 9; Step 11: adjust the adjusting screw 133 on the temporary sling 13 so that the temporary sling 13 is no longer stressed, and then the temporary sling 13 is removed, thereby completing the installation construction of the steel box girder.

[0056] The present invention effectively solves the problem of beam storage in non-suspender beam sections, and the entire operation process is simple, the construction efficiency is high, and the cost is low.

[0057] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one. Devices that are not introduced in detail can be replaced by devices with the same functions in the prior art.

[0058] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0059] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0060] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A suspension bridge steel box girder construction system, comprising at least a main cable (2), a catwalk (6), a permanent cable clamp (15), a permanent sling (14), a double-limb tower column (10), a beam shifting bracket (11) and a tower area bracket (16); a plurality of the permanent cable clamps (15) are provided, and the plurality of permanent cable clamps (15) are all connected to the main cable (2); the permanent cable clamp (15) on the middle span is connected to the permanent sling (14); a catwalk (6) is provided along the main cable (2); the beam shifting bracket (11) and the tower area bracket (16) are respectively connected to the double-limb tower column (10); characterized in that: It also includes three sets of swinging devices and multiple sets of temporary slings (13); two sets of the swinging devices are connected to the main cables (2) of the middle span, and the other set of the swinging devices is connected to the main cables (2) of the side span, and is used for swinging and lifting the steel box girder (9); the top end of each set of temporary slings (13) is connected to the permanent cable clamp (15) on the main cables (2) of the side span, and is used for installing the side span steel box girder (9). After the installation of the side span steel box girder (9) is completed, all temporary slings (13) are removed.

2. A suspension bridge steel box girder construction system as claimed in claim 1, characterized in that: The swing device comprises a temporary cable clamp (1), a hydraulic device (3), a steel strand (4) and an anchor mechanism; one end of the steel strand (4) is connected to the hydraulic device (3), and the other end of the steel strand (4) is connected to the anchor mechanism via the hydraulic device (3); the top of the hydraulic device (3) is connected to the temporary cable clamp (1).

3. A suspension bridge steel box girder construction system as claimed in claim 2, characterized in that: The hydraulic equipment (3) comprises a mounting cylinder (301), a through-hole jack (302), a rope storage mechanism and a hydraulic pump station (308); the mounting cylinder (301) is arranged vertically, and the through-hole jack (302) is connected to the inside of the mounting cylinder; the rope storage mechanism is connected to the outer wall of the mounting cylinder (301); one end of the steel strand (4) is wound in the rope storage mechanism, and the other end of the steel strand (4) is extended to the outside of the bottom of the mounting cylinder (301) through the mounting cylinder (301) and the through-hole jack (302) and then connected to the anchor head (5); the hydraulic pump station (308) is connected to the through-hole jack (302) and is used to control the through-hole jack (302) to retract and release the steel strand (4).

4. A suspension bridge steel box girder construction system as claimed in claim 3, characterized in that: The rope storage mechanism comprises a connecting frame, a rope storage drum (303) and a bunching plate (307); the connecting frame is a frame structure connected to the outer wall of the mounting cylinder (301); the rope storage drum (303) is connected inside the connecting frame and is used for winding the steel strand (4); the bunching plate (307) is connected to the top of the connecting frame and is used for guiding the steel strand (4).

5. A suspension bridge steel box girder construction system as claimed in claim 3, characterized in that: It also comprises a suspension arm mechanism; the suspension arm mechanism is connected to the top of the installation cylinder (301), and the installation cylinder (301) is connected to the temporary cable clamp (1) via the suspension arm mechanism.

6. A suspension bridge steel box girder construction system as claimed in claim 5, characterized in that: The suspension arm mechanism comprises a suspension arm (304), a lower pin shaft (305) and an upper pin shaft (306); the suspension arm (304) is a rectangular plate-shaped structure, and connecting pin holes are respectively provided at both ends of the suspension arm; the upper end of the suspension arm (304) is connected to the temporary cable clamp (1) via the upper pin shaft (306), and the lower end of the suspension arm (304) is connected to the installation cylinder (301) via the lower pin shaft (305).

7. A suspension bridge steel box girder construction system as claimed in claim 3, characterized in that: The mounting tube (301) is a hollow structure with an open lower portion, and a first connecting piece for connecting to a boom mechanism is fixedly connected to the top thereof; a through hole for passing the steel strand (4) is opened on the upper outer wall of the mounting tube (301); a second connecting piece for connecting to the rope storage mechanism is connected to the outer wall of the mounting tube (301) facing the rope storage mechanism; and a guide tube (309) is arranged on the outer side of the through hole for passing the steel strand (4) on the upper outer wall of the mounting tube (301) in an upwardly inclined manner.

8. A suspension bridge steel box girder construction system as claimed in claim 1, characterized in that: The anchor head mechanism comprises an anchor head (5) and an anchor plate (17); the anchor plate (17) is connected to the upper end of the anchor head (5); and the anchor plate (17) is used for connection with the steel strand (4).

9. A suspension bridge steel box girder construction system as claimed in claim 1, characterized in that: The temporary sling (13) comprises an ear plate (131), a connecting sleeve (132), an adjusting screw (133), an anchor cup (134) and a steel wire rope (135); the two ends of the steel wire rope (135) are respectively connected with the anchor cup (134), the adjusting screw (133), the connecting sleeve (132) and the ear plate (131) in order from the end to the outside; the ear plate (131) is a rectangular plate, and a pin hole is opened on one side of the rectangular plate; the connecting sleeve (132) and the adjusting screw (133), and the adjusting screw (133) and the anchor cup (134) are threadedly connected; the inner side wall of one end of the connecting sleeve (132) is provided with a thread matching the adjusting screw (133); the anchor cup (134) is provided with a connecting cavity for connecting with the adjusting screw (133) at one end, and the inner side wall of the connecting cavity is provided with a thread matching the adjusting screw (133).

10. A method for constructing a side span non-hanger beam section of a steel box girder of a suspension bridge, characterized in that: A suspension bridge steel box girder construction system as claimed in any one of claims 1 to 9 is used, comprising the following steps: Step 1: Install three sets of swinging devices from the middle span to the side span, numbered as the first swinging device, the second swinging device, and the third swinging device; the top of each swinging device is fixed to the main cable (2), the bottom of the swinging device is connected to the porous plate (7), and the porous plate (7) is connected to the sling (8); Step 2: transport the steel box girder (9) to the bottom of the first swinging device, and connect and fix the sling (8) to the steel box girder (9); Step 3: Start the first swinging device to lift the steel box girder (9) to a preset height; Step 4: Pull and connect the lower end of the second swing device to the porous plate (7); Step 5: Swing the steel box girder (9) to the bottom of the second swing device, and then remove the lower end of the first swing device from the porous plate (7); Step 6: Use a winch (12) installed on the side span site to horizontally pull the steel box girder (9) onto the beam shifting bracket (11), and then remove the lower end of the second swing shifting device from the porous plate (7); Step 7: Using a winch (12), the steel box girder (9) is slid longitudinally on the beam shifting bracket (11), passes between the double-limb tower columns (10), and is longitudinally shifted to below the designed position; Step 8: Using the third swinging device to hoist the steel box girder (9) to the installation position, installing a temporary sling (13) on the steel box girder (9) of the side span, and fixing the temporary sling (13) on the permanent cable clamp (15) of the side span; Step 9: The same construction process is used to carry out the hoisting construction of other steel box girders (9). The steel box girders (9) without slings in the tower area are stored on the tower area bracket (16). Temporary slings (13) are installed on the steel box girders (9) of the side spans. The temporary slings (13) are connected to the permanent slings (14) of the main cables (2) of the side spans. Permanent slings (14) are installed on the steel box girders (9) of the middle spans. The permanent slings (14) are fixed to the permanent cable clamps (15) until all the steel box girders are installed. Step 10: adjusting the line shapes of all steel box girders (9), welding the circumferential welds of adjacent steel box girders (9), and hoisting the flange plates of the side span steel box girders (9) into place and welding them to form a whole with the steel box girders (9); Step 11: Adjust the temporary sling (13) so that the temporary sling (13) is no longer stressed, and then remove the temporary sling (13), thereby completing the installation construction of the steel box girder.

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