Method for quickly transferring segmental beams located at shoal

Abstract

The invention provides a method for quickly transferring a segmental beam at a shoal, which comprises the following steps of: hoisting the segmental beam onto the first sliding trolleys through underwater floating crane equipment by adopting a steel platform hub, a plurality of first sliding trolleys, a plurality of second sliding trolleys, a first hydraulic jacking device, a second hydraulic jacking device and a plurality of steel buttresses; the segmental beam is moved to the joint of the first channel and the second channel through a first sliding trolley, and if the segmental beam does not need to move on the second channel, the segmental beam is directly hoisted through a deck crane; if the segmental beam needs to move on the second channel, the segmental beam is underpinned to the second sliding trolley through the first hydraulic jacking device, the segmental beam is moved to the to-be-hoisted position of the segmental beam on the second channel through the second sliding trolley, and then the segmental beam is hoisted through the deck crane; the segmental beams are rapidly transferred mainly in a transverse moving, jacking and longitudinal moving mode, the safety and stability of the segmental beams in the rapid transferring process are improved, and the construction efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of large-volume segmental beam transportation, and in particular relates to a method for quickly transporting segmental beams located at a shallow beach. Background Art

[0002] As the application of prefabrication and assembly of elevated bridges becomes more and more mature, the prefabrication and assembly of bridges is gradually developing towards the direction of medium span, lightweight components, high efficiency and beautiful appearance. For the main beam of the upper structure of the super-large cross-river bridge, after the main beam is prefabricated, it is affected by flood control walls and shallows and the transport ship cannot dock at the correct position. How to move the segmental beam to the position of the bridge's positive projection surface has become an important problem in the current construction. At present, construction methods such as jack pushing and sliding, walking-type pushing and other construction methods are often used for transportation and construction. The construction efficiency of jack pushing and sliding, walking-type pushing and other methods is low, and it is not suitable for the transportation and construction of segmental beams with variable cross-sections. Therefore, a method for rapid transportation of segmental beams at shallows is invented. Summary of the invention

[0003] In view of the existing problems in the transportation of segmental beams at shallows, the present invention provides a method for rapid transportation of segmental beams at shallows, which solves the problems of inconvenient transportation of large-volume segmental beams at shallows, low transportation safety and low transfer efficiency.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A method for quickly transporting a segment beam located at a shallow beach comprises the following steps:

[0006] Step 1, construct a segment beam rapid transfer system located at a shoal, the segment beam rapid transfer system located at a shoal comprises a steel platform hub, a plurality of first sliding trolleys, a plurality of second sliding trolleys, a first hydraulic jacking device, a second hydraulic jacking device and a plurality of steel piers, the bottom surface of the steel platform hub is higher than the top surface of the flood control wall, the steel platform hub comprises a first channel and a second channel, the first channel and the second channel are arranged horizontally and are located at the same horizontal height, the first channel is perpendicular to the second channel, the main part of the steel platform hub is erected on the water surface, one end of the first channel is located outside the flood control wall, the other end of the first channel is located outside the flood control wall and connected to one end of the second channel, the other end of the second channel is located inside the flood control wall, the second channel is located below the positive projection of the bridge to be constructed, the first sliding trolley is arranged on the first channel and can move along the first channel, the second sliding trolley is arranged on the second channel and can move along the second channel, a first hydraulic jacking device is arranged at the connection between the first channel and the second channel, the plurality of steel piers are arranged on the second channel at equal intervals along the second channel,

[0007] Step 2: hoist the segment beam onto the first sliding trolley by means of an underwater floating crane.

[0008] Step 3, moving the segment beam to the connection between the first channel and the second channel by a first sliding trolley;

[0009] Step 4, if the segmental beam does not need to be moved on the second channel, the segmental beam is directly hoisted by the bridge crane; if the segmental beam needs to be moved on the second channel, the segmental beam is supported and transferred to the second sliding trolley by the first hydraulic jacking device, and the segmental beam is moved to the segmental beam to be hoisted position on the second channel by the second sliding trolley, and then the segmental beam is hoisted by the bridge crane.

[0010] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallow water, in the process of lifting the segmental beams by using a bridge crane, the other segmental beams are lifted onto the first sliding trolley by means of an underwater floating lifting device, the other segmental beams are moved to the connection between the first channel and the second channel by the first sliding trolley, the segmental beams are supported and replaced on the second sliding trolley by the first hydraulic jacking device, the second hydraulic jacking device and the steel pier are respectively arranged on the second channel at the positions to be installed of the other segmental beams, the segmental beams are moved to the second channel at the positions to be installed of the other segmental beams by the second sliding trolley, the segmental beams are supported and replaced on the steel pier by the second hydraulic jacking device for temporary storage, and the other segmental beams are temporarily stored in sequence from the direction away from the first channel to the direction close to the first channel.

[0011] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallows, the first channel and the second channel of the steel platform hub both include steel pipe piles, a number of cross beams, a number of Bailey beams, a number of distribution beams and patterned steel plates arranged in sequence from bottom to top, the number of cross beams, the number of Bailey beams, the distribution beams and the patterned steel plates are respectively arranged horizontally, the steel pipe piles are arranged in at least two rows, each row of steel pipe piles includes a number of steel pipe piles arranged at intervals, the tops of each row of steel pipe piles are connected by one of the cross beams, the Bailey beams are arranged on the number of cross beams at intervals, the Bailey beams are perpendicular to the cross beams, the distribution beams are arranged on the number of Bailey beams at equal intervals, the distribution beams are perpendicular to the Bailey beams, and the patterned steel plates are laid on the number of distribution beams. The steel pipe piles are connected by crossbeams to improve the overall stability of the steel platform hub. Each group of Bailey beams is connected by a 90-type rack. The Bailey beam is located at the crossbeam fulcrum and a node reinforcement frame is set with I-beams to improve the shear strength of the Bailey beam fulcrum. An anti-overturning limit frame is set with steel sections to prevent the Bailey beam from overturning.

[0012] Preferably, in the above-mentioned method for rapid transportation of segment beams located in shallows, two parallel tracks are laid on the patterned steel plates of the first channel and the second channel respectively, the track on the first channel is perpendicular to the track on the second channel, the first sliding trolley and the second sliding trolley both include a trolley frame, a plurality of steel wheels, a plurality of electric motors and a power device, the power device provides power for the electric motor, a plurality of steel wheels matching the corresponding tracks are provided at the bottom of the trolley frame, the electric motor drives the corresponding steel wheels to move along the corresponding tracks, and leveling steel piers and rubber gaskets are provided on the top of the trolley frame from bottom to top; the number of the first sliding trolleys is four, and the electric motors of the four first sliding trolleys achieve synchronous movement under the control of the controller; the number of the second sliding trolleys is four, and the electric motors of the four second sliding trolleys achieve synchronous movement under the control of the controller. The rail sliding trolley is used for sliding transfer construction. Heavy rails are laid on the transport channel panel. In order to ensure the stability of the rails during the segment beam transfer process, steel plates are used to weld and fix the rails to the trestle panel. Four transfer trolleys are arranged on the rails. The transfer trolleys are composed of a trolley frame, steel wheels, electric motors, etc. The trolleys are equipped with power devices, and the four trolleys move synchronously. The 320t rail sliding trolley is composed of P43 heavy rails, trolley frames, steel wheels, electric motors, etc. The trolley is 2450mm long, 1120mm wide, and 560mm high. The trolley is equipped with a power device, and the single vertical bearing capacity is 80t; the lateral spacing of the wheels is 900mm, and it can move synchronously.

[0013] Preferably, in the above-mentioned method for rapid transportation of segment beams located in shallow water, the first hydraulic jacking device and the second hydraulic jacking device both use a plurality of hydraulic jacks, each hydraulic jack is arranged on a jack base, and the jack base is arranged on the first channel or the second channel.

[0014] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallow waters, the steel piers include steel structure supports and rubber pads, and the rubber pads are arranged on the steel structure to provide a storage support system for the segmental beams when they are rapidly transported to the correct position, while satisfying the change in slope of the bottom plate of the segmental beams. After the segmental beams are transported to the correct position, the hydraulic jacking system is used to lift and support the segmental beams to the steel piers for storage.

[0015] Preferably, in the above-mentioned method for rapid transportation of segmental beams located at a shallow beach, the bridge crane is arranged on the segmental beam that has been installed, and the bridge crane includes a main truss, a front fulcrum structure, a walking system, two lifting systems, two hoists and a plurality of telescopic legs, the front fulcrum structure includes an adjustment beam and pads arranged below both ends of the adjustment beam, the adjustment beam is fixedly arranged below the front part of the main truss, the walking system is arranged below the front fulcrum structure, the plurality of telescopic legs are arranged at the bottom of the main truss, the lifting system is arranged on the main truss, and each lifting system It includes a lifting mechanism, a steel strand and a wire drum, the lifting mechanism adopts a through-type jack, one end of the steel strand is wound around the wire drum, the other end of the steel strand is connected to the corresponding hanger after passing through the through-type jack, two hangers are fixedly connected to the segmental beam to be installed at intervals, and the two hangers are evenly arranged on the segmental beam to be installed along the transverse direction of the segmental beam to be installed. The segmental beam to be installed can be lifted and the transverse angle of the segmental beam to be installed can be adjusted through the two lifting mechanisms, so as to realize the suspended docking installation of the segmental beam to be installed and the installed segmental beam, and the movement of the main truss is realized by the walking system.

[0016] Preferably, in the above-mentioned method for rapid transportation of segmental beams located at a shallow beach, the segmental beam hoisting by a bridge crane comprises the following steps:

[0017] Step S1, installing a bridge crane on the bridge deck for aligning the end of the bridge deck of the segmental beam to be installed, the bridge crane comprising a main truss, a front fulcrum structure, a walking system, two lifting systems, two hoists and a plurality of telescopic legs, the front fulcrum structure comprising an adjustment beam and pads arranged below both ends of the adjustment beam, the adjustment beam is fixedly arranged below the front of the main truss, the walking system is arranged below the front fulcrum structure, the plurality of telescopic legs are arranged at the bottom of the main truss, the lifting system is arranged on the main truss, each lifting system comprises a lifting mechanism, a steel strand and a wire drum, the lifting mechanism adopts a through-type jack, one end of the steel strand is wound around the wire drum, the other end of the steel strand is connected to the corresponding hoist after passing through the through-type jack, the two hoists are fixedly connected to the segmental beam to be installed at intervals, and the two hoists are evenly arranged on the segmental beam to be installed along the transverse direction of the segmental beam to be installed;

[0018] Step S2, fixing the rear part of the main truss on the bridge deck through the rear anchor system, retracting each telescopic support leg away from the bridge deck, and setting the cushion blocks under both ends of the adjustment beam of the front support structure respectively, and lifting the segmental beam to be installed and adjusting the lateral angle of the segmental beam to be installed through two lifting mechanisms, so as to realize the suspended docking installation of the segmental beam to be installed and the installed segmental beam;

[0019] Step S3, remove the rear anchor system, and move the main truss to the end of the bridge deck through the walking system, the walking system includes two walking mechanisms, a rear sliding track and a roller arranged at the rear middle position of the main truss, the rear sliding track is arranged on the bridge deck and is located on the moving route of the roller, the two walking mechanisms are respectively arranged under the two ends of the adjustment beam, the projections of the two slides and the rollers on the horizontal plane are distributed in an isosceles triangle, the walking mechanism is perpendicular to the adjustment beam, the walking mechanism includes a slide, a slide and a walking cylinder, the rear sliding track is parallel to the slide, the fixed end of the walking cylinder is connected to one end of the slide, the free end of the walking cylinder is fixedly connected to the adjustment beam, and the adjustment beam is fixedly connected to the slide.

[0020] Preferably, in the above-mentioned method for rapid transportation of segment beams located at a shallow beach, in step S3, the traveling cylinder moves the main truss to the end of the bridge deck by alternately moving the main truss and the slideway. When the traveling cylinder needs to drive the main truss to move, each telescopic leg is first supported on the bridge deck, the pad of the front fulcrum structure is removed, the rear sliding track is set on the bridge deck and located on the moving path of the roller, and then each telescopic leg is retracted and suspended in the air, so that the front of the main truss is supported on the corresponding slideway through two slide seats. The middle and rear part of the main truss is supported on the rear sliding track through rollers, the traveling cylinder extends, the slide moves synchronously on the corresponding slide, and the roller moves synchronously on the rear sliding track to drive the main truss to move; when the traveling cylinder needs to drive the slide to move, each telescopic leg is extended and supported on the bridge deck first, the two pads of the front fulcrum structure are respectively arranged under the two ends of the adjustment beam, the main truss is supported on the bridge deck through the telescopic legs and the front fulcrum structure, and the traveling cylinder contracts to drive the slide to move.

[0021] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallow waters, the hoist comprises a steel strand joint structure, a main hoisting structure, two auxiliary hoisting structures and an adjusting jack, the two main hoisting structures are arranged at intervals along the transverse direction of the segmental beam to be installed, the two main hoisting structures are parallel to the longitudinal direction of the segmental beam to be installed, the two auxiliary hoisting structures are parallel to the transverse direction of the segmental beam to be installed, the middle parts of the tops of the two auxiliary hoisting structures are respectively connected to the main hoisting structures, and the two auxiliary hoisting structures are arranged at intervals, the two auxiliary hoisting structures are respectively connected to the segmental beam to be installed, and the bottom of the steel strand joint structure Hingeed at the middle of the top of the main lifting structure, the two hoists are evenly arranged on the segmental beam to be installed along the longitudinal direction of the segmental beam to be installed, one end of the adjusting jack is fixedly connected to one end of the top of the main lifting structure, and the other end of the adjusting jack is connected to the upper side of the steel strand joint structure, the steel strand joint structure is coaxially connected to the steel strand, the central axis of the adjusting jack, the central axis of the main lifting frame and the central axis of the steel strand joint structure are located in the same vertical plane, and the angle between the main lifting structure and the steel strand joint structure can be adjusted by adjusting the jack, thereby adjusting the longitudinal angle of the segmental beam to be installed.

[0022] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallows, the main hoisting structure includes a main hoisting frame, a screw, four adjusting nuts, a guide rail and a slider, the guide rail and the screw are arranged on the main hoisting frame in parallel, each of the sliders is provided with a first through hole for the guide rail to pass through and a second through hole for the guide rail to pass through, two sliders are respectively sleeved on the guide rail through their first through holes, two sliders are respectively sleeved on the screw through their second through holes, four adjusting nuts are respectively sleeved on the screw, the internal threads of the four adjusting nuts are respectively matched with the external threads of the screw, one adjusting nut is arranged on both sides of each slider, the slider can move along the guide rail and the screw, the position of the slider on the guide rail can be adjusted by moving the adjusting nuts on both sides of the slider, and the two sliders are respectively connected to the middle of the top of the two auxiliary hoisting structures.

[0023] Preferably, in the above-mentioned method for rapid transportation of segment beams located in shallow water, the sliders are respectively hinged to the middle of the top of the corresponding sub-hanging structure through a cross hinge joint, the cross hinge joint includes a first pin, a second pin and a middle connector, the upper end of the middle connector is hinged to the slider through the first pin, the lower end of the middle connector is hinged to the middle of the top of the sub-hanging structure through the second pin, the first pin and the second pin are perpendicular to each other, and the sub-hanging structure is connected to the segment beam to be installed.

[0024] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallows, the rear anchor system includes a plurality of threaded steel rods, a plurality of nuts and a plurality of pads, the lower ends of the steel rods are successively passed through the reserved holes of the installed segmental beams and the pads and are fixed by corresponding nuts, the upper ends of the steel rods are successively passed through the lower cross beam at the bottom of the rear of the main truss and the pads and are fixed by corresponding nuts, and the steel rods are evenly distributed on the lower cross beam at the rear of the main truss.

[0025] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallows, the main truss includes two upper cross beams, two upper main beams, two front support beams, two rear support beams, two tension beams, two bottom beams and two lower cross beams, the two bottom beams are connected with the two lower cross beams to form a horizontally arranged bottom rectangular frame, the two upper cross beams are connected with the two upper main beams to form a horizontally arranged top rectangular frame, the upper cross beams and the lower cross beams are parallel to the longitudinal direction of the bridge structure, the upper main beam is parallel to the bottom beam, the bottom rectangular frame is located on the bridge deck for aligning with the end of the segmental beam to be installed, and the top The upper rectangular frame is located obliquely above the bottom rectangular frame, the lower end of the front support beam is fixedly connected to the front end of the corresponding bottom beam, the upper end of the front support beam is fixedly connected to the front end of the corresponding upper main beam, the lower end of the rear support beam is fixedly connected to the front end of the corresponding bottom beam, the upper end of the rear support beam is fixedly connected to the rear end of the corresponding upper main beam, the lower end of the tension beam is fixedly connected to the rear end of the corresponding bottom beam, the upper end of the tension beam is fixedly connected to the rear end of the corresponding upper main beam, the horizontal projection of the main part of the upper main beam is located on the outside of the bridge deck, and a platform is provided on the top rectangular frame, and the lifting mechanism is arranged on the platform.

[0026] It can be seen from the technical solutions disclosed above that, compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] In summary, the present invention provides a method for rapid transportation of segmental beams located in shallow waters, which adopts a steel platform hub, a plurality of first sliding trolleys, a plurality of second sliding trolleys, a first hydraulic jacking device, a second hydraulic jacking device and a plurality of steel piers. The bottom surface of the steel platform hub is higher than the top surface of the flood control wall. The steel platform hub includes a first channel and a second channel. The first channel and the second channel are horizontally arranged and located at the same horizontal height. The first channel is perpendicular to the second channel. The main part of the steel platform hub is erected on the water surface. One end of the first channel is located on the outside of the flood control wall, the other end of the first channel is located on the outside of the flood control wall and is connected to one end of the second channel, the other end of the second channel is located on the inside of the flood control wall, the second channel is located below the positive projection of the bridge to be constructed, and the first sliding trolley is arranged at the first The first channel is on the first channel and can move along the first channel, the second sliding trolley is arranged on the second channel and can move along the second channel, the first hydraulic jacking device is arranged at the connection between the first channel and the second channel, the plurality of steel piers are arranged at equal intervals on the second channel along the second channel, the segmental beam is hoisted onto the first sliding trolley by the underwater floating hoisting equipment, the segmental beam is moved to the connection between the first channel and the second channel by the first sliding trolley, if the segmental beam does not need to be moved on the second channel, it is directly hoisted by the bridge crane; if the segmental beam needs to be moved on the second channel, the segmental beam is replaced by the first hydraulic jacking device to the second sliding trolley, the segmental beam is moved to the segmental beam waiting hoisting position on the second channel by the second sliding trolley, and then hoisted by the bridge crane. The present invention mainly adopts the method of lateral movement + jacking + longitudinal movement to quickly transport the segmental beam, which can improve the safety and stability of the segmental beam during the rapid transportation process, and has high construction efficiency, which can greatly save construction time and construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is one of the plan schematic diagrams of the rapid transfer system of segmental beams located in the shallows (the segmental beams are hoisted onto the first sliding trolley by means of underwater floating crane equipment).

[0029] Figure 2 yes Figure 1 Schematic diagram of the A-direction elevation.

[0030] Figure 3 This is the second plan view of the rapid transfer system of segment beams located at the shallows (the segment beams are moved to the connection between the first channel and the second channel by the first sliding trolley).

[0031] Figure 4 yes Figure 3 Schematic diagram of the B-direction elevation.

[0032] Figure 5This is the third plan view of the rapid transfer system for segmental beams located at the shallows (lifting by bridge crane).

[0033] Figure 6 This is the third plan view of the rapid transfer system for segmental beams located at a shallow site (the segmental beams are supported and transferred to the second sliding trolley through the first hydraulic jacking device).

[0034] Figure 7 This is the third plan view of the rapid transfer system for segment beams located at the shallows (the segment beams are moved to the position where the segment beams are to be hoisted on the second channel by the second sliding trolley).

[0035] Figure 8 yes Figure 7 Schematic diagram of the C-direction elevation.

[0036] Fig. 9 This is the third plan view of the rapid transfer system for segmental beams located in the shallows (the segmental beams are supported and transferred to the steel piers for temporary storage through the second hydraulic jacking device).

[0037] Fig.10 It is a three-dimensional schematic diagram of a bridge crane used for lifting corrugated steel web segmental beams.

[0038] Fig.11 This is the side elevation view of the bridge crane.

[0039] Fig.12 This is the front elevation view of the bridge crane.

[0040] Fig.13 This is the plan view of the bridge crane.

[0041] Fig.14 It is a structural diagram of the sling.

[0042] Fig.15 yes Fig.14 Side view of.

[0043] Fig.16 It is a structural diagram of the front fulcrum structure.

[0044] Fig.17 It is a structural diagram of the walking mechanism.

[0045] Fig.18 It is a schematic diagram of the distribution of the walking mechanism and the rear sliding track.

[0046] Fig.19 It is a structural diagram of the main truss.

[0047] In the figure: 1a-first channel, 1b-second channel, 11-steel pipe pile, 12-crossbeam, 13-Bailey beam, 14-distribution beam, 15-patterned steel plate, 2a-first sliding trolley, 2b-second sliding trolley, 3a-first hydraulic jacking device, 3b-second hydraulic jacking device, 31-hydraulic jack, 32-jack base, 4-steel pier, 5-bridge crane, 51-main truss, 511-upper crossbeam, 512-upper main beam, 513-front support beam, 514-rear support beam, 515-lower crossbeam, 516-bottom beam, 517-tension beam, 518-strengthening beam, 52-front fulcrum structure, 521-adjustment crossbeam, 522-pad, 53-travel system, 531-travel cylinder, 532-slide seat, 533-slideway, 534-rear sliding track, 54-telescopic legs, 55-lifting system, 551-lifting mechanism, 552-steel strand, 553-cable drum, 56-hanging device, 561-steel strand joint structure, 562-main lifting structure, 5621-main lifting frame, 5622-screw, 5623-adjusting nut, 5624-guide rail, 5625-slider, 563-auxiliary lifting structure, 564-adjusting jack, 565-cross hinge joint, 5651-first pin shaft, 5652-second pin shaft, 5653-middle connector, 61-leveling steel pier, 62-rubber gasket, 7-installed segmental beams, 8-segmental beams to be installed, 100-flood control wall. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The technical content and features of the present invention will be described in detail below by combining the enumerated embodiments with the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. For the convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the accompanying drawings, but this cannot be a limitation of the technical solution of the present invention.

[0049] See also Figures 1 to 19 This embodiment discloses a method for rapid transportation of a segment beam located at a shallow beach, comprising the following steps:

[0050] Step 1, construct a segment beam rapid transfer system located at the shoal, the segment beam rapid transfer system located at the shoal includes a steel platform hub, a plurality of first sliding trolleys 2a, a plurality of second sliding trolleys 2b, a first hydraulic jacking device 3a, a second hydraulic jacking device 3b and a plurality of steel piers 4, the bottom surface of the steel platform hub is higher than the top surface of the flood control wall 100, the steel platform hub includes a first channel 1a and a second channel 1b, the first channel 1a and the second channel 1b are horizontally arranged and located at the same horizontal height, the first channel 1a is perpendicular to the second channel 1b, the main part of the steel platform hub is erected on the water surface, one end of the first channel 1a is located at On the outside of the flood control wall 100, the other end of the first channel 1a is located on the outside of the flood control wall 100 and connected to one end of the second channel 1b, the other end of the second channel 1b is located on the inside of the flood control wall 100, and the second channel 1b is located below the positive projection of the bridge to be constructed. The first sliding trolley 2a is arranged on the first channel 1a and can move along the first channel 1a, the second sliding trolley 2b is arranged on the second channel 1b and can move along the second channel 1b, and the first hydraulic jacking device 3a is provided at the connection between the first channel 1a and the second channel 1b, and the plurality of steel piers 4 are arranged on the second channel 1b at equal intervals along the second channel 1b.

[0051] Step 2: hoist the segment beam onto the first sliding trolley 2a by means of an underwater floating crane (not shown).

[0052] Step 3, moving the segment beam to the connection between the first channel 1a and the second channel 1b by the first sliding trolley 2a;

[0053] Step 4, if the segmental beam does not need to be moved on the second channel 1b, the segmental beam is directly hoisted by the bridge crane 5; if the segmental beam needs to be moved on the second channel 1b, the segmental beam is supported on the second sliding trolley 2b by the first hydraulic jacking device 3a, and the segmental beam is moved to the segmental beam to be hoisted position on the second channel 1b by the second sliding trolley 2b, and then the segmental beam is hoisted by the bridge crane 5.

[0054] After the segmental beam is prefabricated, if the transport ship cannot dock at the correct position, that is, directly below the position where the segmental beam is to be installed, due to the influence of the shoal, how to move the segmental beam to the position of the bridge projection surface, that is, directly below the position where the segmental beam is to be installed has become an important problem in many current projects. Conventional construction methods such as jack-pushing sliding and walking-type pushing are used for moving and construction. The construction efficiency of jack-pushing sliding and walking-type pushing is low, and it is not suitable for the moving and construction of segmental beams with variable cross-sections. The present invention adopts the method of lateral movement + jacking + longitudinal movement to quickly transport the segmental beam, with the steel platform hub of the main part in the water as the hub channel, the first hydraulic jacking device 3a as the supporting device, and the first sliding trolley 2a and the second sliding trolley 2b as the load-bearing transportation equipment, so as to quickly transport the segmental beam to the position to be hoisted, that is, the correct position, which can improve the safety and stability of the segmental beam during the rapid transportation process, and has high construction efficiency, which can effectively save construction time and construction costs.

[0055] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallow water, in the process of lifting the segmental beams by the bridge crane 5, the other segmental beams are lifted onto the first sliding trolley 2a by the underwater floating lifting equipment, the other segmental beams are moved to the connection between the first channel 1a and the second channel 1b by the first sliding trolley 2a, the segmental beams are supported and transferred to the second sliding trolley 2b by the first hydraulic jacking device 3a, the second hydraulic jacking device 3b and the steel pier 4 are respectively arranged on the second channel 1b at the position to be installed of the other segmental beams, the segmental beams are moved to the second channel 1b at the position to be installed of the other segmental beams by the second sliding trolley 2b, the segmental beams are supported and transferred to the steel pier 4 by the second hydraulic jacking device 3b for temporary storage, and the other segmental beams are temporarily stored in sequence from the direction away from the first channel 1a to the direction close to the first channel 1a. In this way, while one segmental beam is being hoisted, other segmental beams can be safely and temporarily stored, which not only ensures the safety and stability of the segmental beams during rapid transportation, but also further improves construction efficiency and significantly saves construction time and construction costs.

[0056] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallows, the first channel 1a and the second channel 1b of the steel platform hub both include steel pipe piles 11, a plurality of cross beams 12, a plurality of Bailey beams 13, a plurality of distribution beams 14 and a patterned steel plate 15 arranged in sequence from bottom to top, the plurality of cross beams 12, the plurality of Bailey beams 13, the distribution beams 14 and the patterned steel plates 15 are respectively arranged horizontally, the steel pipe piles 11 are arranged in at least two rows, each row of steel pipe piles 11 includes a plurality of steel pipe piles 11 arranged at intervals, the tops of each row of steel pipe piles 11 are connected by one of the cross beams 12, the Bailey beams 13 are arranged at intervals on the plurality of cross beams 12, the Bailey beams 13 are perpendicular to the cross beams 12, the distribution beams 14 are arranged at equal intervals on the plurality of Bailey beams 13, the distribution beams 14 are perpendicular to the Bailey beams 13, and the patterned steel plates 15 are laid on the plurality of distribution beams 14. The steel pipe piles 11 are connected by cross beams 12 to improve the overall stability of the steel platform hub. Each group of Bailey beams 13 is connected by a 90-type flower rack. The Bailey beams 13 are located at the fulcrum of the cross beam 12 and a node reinforcement frame is set with I-beams to improve the shear strength of the fulcrum of the Bailey beams 13. The anti-overturning limit frame is set with steel to prevent the overturning of the Bailey beams 13. In addition, the Bailey beams 13 are reinforced Bailey beams 13 to improve their own strength and stability.

[0057] Preferably, in the above-mentioned method for rapid transportation of segment beams located in shallows, two parallel tracks are laid on the patterned steel plates 15 of the first channel 1a and the second channel 1b, respectively, and the track on the first channel 1a is perpendicular to the track on the second channel 1b. The first sliding trolley 2a and the second sliding trolley 2b both include a trolley frame, a plurality of steel wheels, a plurality of electric motors and a power device, the power device provides power for the electric motor, a plurality of steel wheels matching the corresponding tracks are provided at the bottom of the trolley frame, the electric motor drives the corresponding steel wheels to move along the corresponding tracks, and a leveling steel pier 61 and a rubber gasket 62 are provided on the top of the trolley frame from bottom to top; the number of the first sliding trolleys 2a is four, and the electric motors of the four first sliding trolleys 2a achieve synchronous movement under the control of the controller; the number of the second sliding trolleys 2b is four, and the electric motors of the four second sliding trolleys 2b achieve synchronous movement under the control of the controller. The sliding transfer construction is carried out by using a rail sliding trolley, and heavy rails are laid on the transport channel panel. In order to ensure the stability of the rails during the segment beam transfer process, steel plates are used to weld and fix the rails to the trestle panel. The first sliding trolley 2a and the second sliding trolley 2b both use 320t rail sliding trolleys. The 320t rail sliding trolleys are composed of P43 heavy rails, trolley frames, steel wheels, electric motors, etc. The trolley is 2450mm long, 1120mm wide, and 560mm high. The trolley is equipped with a power device, and the single vertical bearing capacity is 80t; the lateral spacing of the wheels is 900mm. The maximum load capacity of a single 320t rail sliding trolley is 80t. Each trolley has 4 (1.1WK) electric motors, i.e., motors. Four motors form a group, with a total of 16 (1.1KW) motors. The 16 motors are aligned, and limit switches are installed on both sides of the track. They are connected to the forward and reverse control box, and the operation of the 320t rail sliding trolley is controlled by buttons to ensure synchronous movement when the sliding trolley is loaded. In addition, the four first sliding trolleys 2a can be connected to each other to further improve synchronization. The four second sliding trolleys 2b can be connected to each other to further improve synchronization.

[0058] Preferably, in the above-mentioned method for rapid transportation of segment beams located at a shallow beach, the first hydraulic jacking device 3a and the second hydraulic jacking device 3b both use a plurality of hydraulic jacks, each of which is arranged on a jack base, and the jack base is arranged on the first channel 1a or the second channel 1b. The jack base of the first hydraulic jacking device 3a is fixedly arranged at the connection between the first channel 1a and the second channel 1b; the jack base of the second hydraulic jacking device 3b is detachably fixedly arranged on the second channel 1b as required, and can be specifically connected by bolts to facilitate the replacement of the second hydraulic jacking device 3b.

[0059] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallow waters, the steel pier 4 includes a steel structure support and a rubber pad 522. The rubber pad 522 is arranged on the steel structure to provide a storage support system for the segmental beam when it is rapidly transported to the correct position, while satisfying the change in slope of the bottom plate of the segmental beam. After the segmental beam is transported to the correct position, the hydraulic jacking system is used to lift and support the segmental beam to the steel pier 4 for storage.

[0060] Preferably, in the above-mentioned method for rapid transportation of segmental beams located at a shallow beach, the bridge crane 5 is arranged on the segmental beam that has been installed, and the bridge crane 5 includes a main truss 51, a front fulcrum structure 52, a walking system 53, two lifting systems 55, two hoists 56 and a plurality of telescopic legs 54, the front fulcrum structure 52 includes an adjustment beam 521 and pads 522 arranged below the two ends of the adjustment beam 521, the adjustment beam 521 is fixedly arranged below the front part of the main truss 51, the walking system 53 is arranged below the front fulcrum structure 52, the plurality of telescopic legs 54 are arranged at the bottom of the main truss 51, the lifting system 55 is arranged on the main truss 51, and each lifting system 55 is arranged on the main truss 51. 55 includes a lifting mechanism 551, a steel strand 552 and a wire drum 553. The lifting mechanism 551 adopts a through-type jack. One end of the steel strand 552 is wound around the wire drum 553. The other end of the steel strand 552 passes through the through-type jack and is connected to the corresponding hanger 56. Two hangers 56 are fixedly connected to the segmental beam 8 to be installed at intervals. The two hangers 56 are evenly arranged on the segmental beam 8 to be installed along the transverse direction of the segmental beam 8 to be installed. The segmental beam 8 to be installed can be lifted and the transverse angle of the segmental beam 8 to be installed can be adjusted through the two lifting mechanisms 551, so as to realize the suspended docking installation of the segmental beam 8 to be installed and the installed segmental beam 7. The movement of the main truss 51 is realized by the walking system 53. On the one hand, the segmental beam 8 to be installed is lifted by two lifting mechanisms 551. The through-type jacks adopted by the lifting mechanisms 551 have high precision control. The two lifting mechanisms 551 can adjust the lateral angle of the segmental beam 8 to be installed by retracting and releasing the steel strands 552 of different lengths, that is, by lifting the steel strands 552 on one side, one side of the segmental beam 8 to be installed where the sling 56 corresponding to the steel strands 552 is located will be raised compared to the other side, so that the segmental beam 8 to be installed can be accurately lifted and the lifting angle can be adjusted, and the segmental beam 8 to be installed and the installed segmental beam 7 can be connected in mid-air, thereby improving the symmetrical suspension accuracy of the segmental beams, effectively improving the construction efficiency of the symmetrical suspension of the segmental beams, and solving the problem of symmetrical suspension of large-span corrugated steel web PC composite beams while ensuring structural stability and safety. On the other hand, the bridge crane 5 can move the main truss 51 through the walking system 53, which improves the movement efficiency of the bridge crane 5 while ensuring the stability and safety of the structure of the bridge crane 5, thereby improving the construction efficiency and shortening the construction period.

[0061] Preferably, in the above-mentioned method for rapid transportation of segmental beams at a shallow site, the segmental beam hoisting by the bridge crane 5 comprises the following steps:

[0062] Step S1, installing a bridge crane 5 on the bridge deck for aligning the end of the bridge deck of the segmental beam to be installed, the bridge crane 5 includes a main truss 51, a front fulcrum structure 52, a walking system 53, two lifting systems 55, two hangers 56 and a plurality of telescopic legs 54, the front fulcrum structure 52 includes an adjustment beam 521 and pads 522 arranged below the two ends of the adjustment beam 521, the adjustment beam 521 is fixedly arranged below the front part of the main truss 51, the walking system 53 is arranged below the front fulcrum structure 52, and the plurality of telescopic legs 54 The lifting system 55 is arranged at the bottom of the main truss 51. Each lifting system 55 includes a lifting mechanism 551, a steel strand 552 and a wire drum 553. The lifting mechanism 551 adopts a through-type jack. One end of the steel strand 552 is wound around the wire drum 553. The other end of the steel strand 552 is connected to the corresponding hanger 56 after passing through the through-type jack. Two hangers 56 are fixedly connected to the segment beam 8 to be installed at intervals. The two hangers 56 are evenly arranged on the segment beam 8 to be installed along the transverse direction of the segment beam 8 to be installed.

[0063] Step S2, fix the rear part of the main truss 51 on the bridge deck through the rear anchor system, retract the telescopic support legs and leave the bridge deck, and respectively set the cushion blocks 522 under the two ends of the adjustment beam 521 of the front support structure 52, and the segment beam 8 to be installed can be lifted and the lateral angle of the segment beam 8 to be installed can be adjusted through two lifting mechanisms 551, so as to realize the suspended docking installation of the segment beam 8 to be installed and the installed segment beam 7;

[0064] Step S3, remove the rear anchor system, and move the main truss 51 to the end of the bridge deck through the walking system 53, the walking system 53 includes two walking mechanisms, a rear sliding track 534 and a roller arranged at the rear middle position of the main truss 51, the rear sliding track 534 is arranged on the bridge deck and is located on the moving route of the roller, the two walking mechanisms are respectively arranged below the two ends of the adjustment beam 521, the projections of the two slides 532 and the rollers on the horizontal plane are distributed in an isosceles triangle, the walking mechanism is perpendicular to the adjustment beam 521, the walking mechanism includes a slide 533, a slide 532 and a walking cylinder 531, the rear sliding track 534 is parallel to the slide 533, the fixed end of the walking cylinder 531 is connected to one end of the slide 533, the free end of the walking cylinder 531 is fixedly connected to the adjustment beam 521, and the adjustment beam 521 is fixedly connected to the slide 532.

[0065] Preferably, in the above-mentioned method for rapid transportation of segment beams located at a shallow beach, in step S3, the travel cylinder 531 moves the main truss 51 to the end of the bridge deck by alternately moving the main truss 51 and the slide 533. When the travel cylinder 531 needs to drive the main truss 51 to move, each telescopic leg 54 is first supported on the bridge deck, the pad 522 of the front fulcrum structure 52 is removed, and the rear sliding track 534 is set on the bridge deck and located on the moving path of the roller, and then each telescopic leg 54 is retracted and suspended in the air, so that the front part of the main truss 51 is supported on the corresponding slide 533 through the two slide seats 532, and the main truss 51 is supported on the bridge deck. The middle and rear part of the main truss 51 is supported on the rear sliding track 534 through rollers, the travel cylinder 531 is extended, the slide 532 moves synchronously on the corresponding slide 533, and the roller moves synchronously on the rear sliding track 534, driving the main truss 51 to move; when the travel cylinder 531 needs to drive the slide 533 to move, each telescopic leg 54 is extended and supported on the bridge deck, the two pads 522 of the front fulcrum structure 52 are respectively arranged under the two ends of the adjustment beam 521, the main truss 51 is supported on the bridge deck through the telescopic legs 54 and the front fulcrum structure 52, and the travel cylinder 531 is contracted to drive the slide 533 to move. Since the projections of the two slides 532 and rollers installed at the bottom of the main truss 51 on the horizontal plane are distributed in an isosceles triangle, when the travel cylinder 531 is extended, the slide 532 moves synchronously on the corresponding slide 533, and the roller moves synchronously on the rear sliding track 534, making the movement of the main truss 51 more stable and safe.

[0066] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in shallow waters, the hoist 56 includes a steel strand joint structure 561, a main hoisting structure 562, two auxiliary hoisting structures 563 and an adjusting jack 564, the two main hoisting structures 562 are arranged at intervals along the transverse direction of the segmental beam 8 to be installed, the two main hoisting structures 562 are parallel to the longitudinal direction of the segmental beam 8 to be installed, the two auxiliary hoisting structures 563 are parallel to the transverse direction of the segmental beam 8 to be installed, the middle parts of the tops of the two auxiliary hoisting structures 563 are respectively connected to the main hoisting structure 562, and the two auxiliary hoisting structures 563 are arranged at intervals, the two auxiliary hoisting structures 563 are respectively connected to the segmental beam 8 to be installed, and the bottom of the steel strand joint structure 561 is hinged. In the middle of the top of the main hanging structure 562, two hangers 56 are evenly arranged on the segmental beam 8 to be installed along the longitudinal direction of the segmental beam 8 to be installed, one end of the adjusting jack 564 is fixedly connected to the top end of the main hanging structure 562, and the other end of the adjusting jack 564 is connected to the upper side of the steel strand joint structure 561, and the steel strand joint structure 561 is coaxially connected to the steel strand 552. The central axis of the adjusting jack 564, the central axis of the main hanging frame 5621 and the central axis of the steel strand joint structure 561 are located in the same vertical plane. By adjusting the jack 564, the angle between the main hanging structure 562 and the steel strand joint structure 561 can be adjusted, thereby adjusting the longitudinal angle of the segmental beam 8 to be installed. That is to say, when the adjusting jack 564 contracts, the end of the main hanging structure 562 on which the adjusting jack 564 is installed will be raised, and the auxiliary hanging structure 563 corresponding to the end of the main hanging structure 562 on which the adjusting jack 564 is installed will be raised, so that the corresponding end of the segment beam to be installed connected to the auxiliary hanging structure 563 corresponding to the end of the main hanging structure 562 on which the adjusting jack 564 is installed will be raised, thereby achieving the adjustment of the longitudinal angle of the segment beam 8 to be installed, further improving the precision and efficiency of the suspended docking between the segment beams. In addition, during the segment beam hoisting operation, by adjusting the two adjusting jacks 564 and the two lifting mechanisms 551, the horizontal and vertical slopes of the segment beam can be adjusted to ensure that the hoist 56 is evenly stressed and the segment beam is lifted vertically in a horizontal posture, further improving the hoisting quality and precision.

[0067] Preferably, in the above-mentioned method for rapid transportation of segment beams located at the shallows, the main hanging structure 562 includes a main hanging frame 5621, a screw 5622, four adjusting nuts 5623, a guide rail 5624 and a slider 5625, the guide rail 5624 and the screw 5622 are arranged on the main hanging frame 5621 in parallel, each of the sliders 5625 is provided with a first through hole for the guide rail 5624 to pass through and a second through hole for the guide rail 5624 to pass through, the two sliders 5625 are respectively sleeved on the guide rail 5624 through their first through holes, and the two sliders 5625 are respectively The second through hole is sleeved on the screw rod 5622, and four adjusting nuts 5623 are sleeved on the screw rod 5622 respectively. The internal threads of the four adjusting nuts 5623 match the external threads of the screw rod 5622 respectively. An adjusting nut 5623 is arranged on both sides of each slider 5625 respectively. The slider 5625 can move along the guide rail 5624 and the screw rod 5622. The position of the slider 5625 on the guide rail 5624 can be adjusted by moving the adjusting nuts 5623 on both sides of the slider 5625. The two sliders 5625 are respectively connected to the middle of the top of the two auxiliary suspension structures 563. With the above structure, the position and spacing of the two auxiliary suspension structures 563 can be adjusted, which not only makes the sling 56 suitable for segmental beams of different sizes, but also makes the two auxiliary suspension structures 563 evenly arranged on the segmental beam 8 to be installed, so that the segmental beam 8 to be installed is evenly stressed during the hoisting and is not easily deformed or damaged.

[0068] Preferably, in the above-mentioned method for rapid transportation of segment beams located in shallow water, the sliders 5625 are respectively hinged to the middle of the top of the corresponding auxiliary suspension structure 563 through a cross hinge joint 565, and the cross hinge joint 565 includes a first pin 5651, a second pin 5652 and a middle connector 5653, the upper end of the middle connector 5653 is hinged to the slider 5625 through the first pin 5651, and the lower end of the middle connector 5653 is hinged to the middle of the top of the auxiliary suspension structure 563 through the second pin 5652, the first pin 5651 and the second pin 5652 are perpendicular to each other, and the auxiliary suspension structure 563 is connected to the segment beam 8 to be installed. The auxiliary suspension structure 563 is connected to the main suspension structure 562 through a cross hinge 565. Even if the segment beam 8 to be installed undergoes considerable deformation during the processes of prefabrication, hoisting and storage (especially double-layer stacking), the auxiliary suspension structure 563 can be made to fit on the surface of the segment beam 8 to be installed by adjusting the relative angle between the auxiliary suspension structure 563 and the main suspension structure 562. Finally, the auxiliary suspension structure 563 is connected and fixed to the segment beam 8 to be installed through the screw rod 5622 assembly, so that the segment beam 8 to be installed is evenly stressed during hoisting and is not easily deformed or damaged. In other words, the auxiliary suspension structure 563 is connected to the main suspension structure 562 through a cross hinge 565, which can meet the deflection of the segment beam in the longitudinal and transverse directions during hoisting, can adapt to the special deformation requirements of the corrugated steel web segment beam, and effectively improve the hoisting quality and accuracy.

[0069] Preferably, in the above-mentioned method for rapid transportation of segmental beams located at a shallow beach, the rear anchor system includes a plurality of threaded steel bars, a plurality of nuts and a plurality of pads, the lower ends of the steel bars are successively passed through the reserved holes of the installed segmental beams and the pads and then fixed by corresponding nuts, the upper ends of the steel bars are successively passed through the lower cross beam 515 at the bottom of the rear of the main truss 51 and the pads and then fixed by corresponding nuts, and the steel bars are evenly distributed on the lower cross beam 515 at the rear of the main truss 51. When the bridge crane 5 hoists the segmental beam, the rear of the main truss 51 is fixed to the bridge deck by the rear anchor system, which can improve the stability and safety of the main truss 51 when the lifting mechanism 551 hoists the segmental beam.

[0070] Preferably, in the above-mentioned method for rapid transportation of segmental beams located in the shallows, the main truss 51 includes two upper cross beams 511, two upper main beams 512, two front support beams 513, two rear support beams 514, two tension beams 517, two bottom beams 516 and two lower cross beams 515, the two bottom beams 516 are connected with the two lower cross beams 515 to form a horizontally arranged bottom rectangular frame, the two upper cross beams 511 are connected with the two upper main beams 512 to form a horizontally arranged top rectangular frame, the upper cross beams 511 and the lower cross beams 515 are parallel to the longitudinal direction of the bridge structure, the upper main beam 512 is parallel to the bottom beam 516, and the bottom rectangular frame is located on the bridge deck for aligning with the end of the segmental beam to be installed. The top rectangular frame is located obliquely above the bottom rectangular frame, the lower end of the front support beam 513 is fixedly connected to the front end of the corresponding bottom beam 516, the upper end of the front support beam 513 is fixedly connected to the front end of the corresponding upper main beam 512, the lower end of the rear support beam 514 is fixedly connected to the front end of the corresponding bottom beam 516, the upper end of the rear support beam 514 is fixedly connected to the rear end of the corresponding upper main beam 512, the lower end of the tension beam 517 is fixedly connected to the rear end of the corresponding bottom beam 516, the upper end of the tension beam 517 is fixedly connected to the rear end of the corresponding upper main beam 512, the horizontal projection of the main part of the upper main beam 512 is located outside the bridge deck, a platform is provided on the top rectangular frame, and the lifting mechanism 551 is arranged on the platform. The main truss 51 is made of steel material. , which is composed of the main force-bearing rods such as the upper main beam 512, the upper cross beam 511, the front support beam 513, the rear support beam 514, the tension beam 517, the bottom beam 516 and the lower cross beam 515 and other auxiliary parallel connecting rods. The upper main beam 512, the upper cross beam 511, the front support beam 513, the rear support beam 514, the tension beam 517, the bottom beam 516 and the lower cross beam 515 are respectively connected to form a parallelogram structure with two stable triangular structures through flange plates and pins, which effectively improves the stability of the main truss 51. In order to further improve the stability of the main truss 51, a reinforcing beam 518 parallel to the upper main beam 512 is provided on the inner side of the upper main beam 512, and a reinforcing beam 518 parallel to the front support beam 513 is provided on the inner side of the front support beam 513. In addition, the internal space of the truss is used to place the hydraulic power pump station and the electric control system, and provide a working platform for construction operations. To facilitate transportation, the truss adopts a detachable design with flange connection and pin connection.

[0071] See also Fig. 9 , Fig. 9 The bridge crane on the left side is carrying out the construction of the left bridge deck, and the bridge crane 5 on the right side is carrying out the construction of the right bridge deck. The bridge crane 5 on the right side directly lifts the segmental beams on the transport ship, and construction is carried out on both sides at the same time, thereby improving construction efficiency.

[0072] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A method for rapid transportation of segmental beams located in a shallow area, characterized in that: The steps include: Step 1, construct a segment beam rapid transfer system located at a shoal, the segment beam rapid transfer system located at a shoal comprises a steel platform hub, a plurality of first sliding trolleys, a plurality of second sliding trolleys, a first hydraulic jacking device, a second hydraulic jacking device and a plurality of steel piers, the bottom surface of the steel platform hub is higher than the top surface of the flood control wall, the steel platform hub comprises a first channel and a second channel, the first channel and the second channel are arranged horizontally and are located at the same horizontal height, the first channel is perpendicular to the second channel, the main part of the steel platform hub is erected on the water surface, one end of the first channel is located outside the flood control wall, the other end of the first channel is located outside the flood control wall and connected to one end of the second channel, the other end of the second channel is located inside the flood control wall, the second channel is located below the positive projection of the bridge to be constructed, the first sliding trolley is arranged on the first channel and can move along the first channel, the second sliding trolley is arranged on the second channel and can move along the second channel, a first hydraulic jacking device is arranged at the connection between the first channel and the second channel, the plurality of steel piers are arranged on the second channel at equal intervals along the second channel, Step 2: hoist the segment beam onto the first sliding trolley by means of an underwater floating crane. Step 3, moving the segment beam to the connection between the first channel and the second channel by a first sliding trolley; Step 4, if the segmental beam does not need to be moved on the second channel, the segmental beam is directly hoisted by the bridge crane; if the segmental beam needs to be moved on the second channel, the segmental beam is supported and transferred to the second sliding trolley by the first hydraulic jacking device, and the segmental beam is moved to the segmental beam to be hoisted position on the second channel by the second sliding trolley, and then the segmental beam is hoisted by the bridge crane.

2. The method for rapid transportation of segment beams located at a shallow beach as claimed in claim 1, characterized in that: In the process of hoisting the segmental beams by using the bridge crane, the other segmental beams are hoisted onto the first sliding trolley by the underwater floating lifting equipment, the other segmental beams are moved to the connection between the first channel and the second channel by the first sliding trolley, the segmental beams are supported and replaced on the second sliding trolley by the first hydraulic jacking device, the second hydraulic jacking device and the steel pier are respectively arranged on the positions to be installed of the other segmental beams on the second channel, the segmental beams are moved to the positions to be installed of the other segmental beams on the second channel by the second sliding trolley, the segmental beams are supported and replaced on the steel pier by the second hydraulic jacking device for temporary storage, and the other segmental beams are temporarily stored in sequence from the direction away from the first channel to the direction close to the first channel.

3. The method for rapid transportation of segment beams at a shallow site as claimed in claim 1, characterized in that: The first channel and the second channel of the steel platform hub both include steel pipe piles, a number of cross beams, a number of Bailey beams, a number of distribution beams and patterned steel plates arranged in sequence from bottom to top. The number of cross beams, the number of Bailey beams, the distribution beams and the patterned steel plates are arranged horizontally respectively. The steel pipe piles are arranged in at least two rows, each row of steel pipe piles includes a number of steel pipe piles arranged at intervals, and the tops of each row of steel pipe piles are connected by a cross beam. The Bailey beams are arranged at intervals on the number of cross beams, and the Bailey beams are perpendicular to the cross beams. The distribution beams are arranged at equal intervals on the number of Bailey beams, and the distribution beams are perpendicular to the Bailey beams. The patterned steel plates are laid on the number of distribution beams. The steel pipe piles are connected by cross beams to improve the overall stability of the steel platform hub. Each group of Bailey beams is connected by a 90-type flower rack. The Bailey beams are located at the cross beam fulcrum position and the node reinforcement frame is set by I-beams to improve the shear strength of the Bailey beam fulcrum, and the anti-overturning limit frame is set by steel to prevent the Bailey beam from overturning.

4. The method for rapid transportation of segment beams at a shallow site as claimed in claim 1, characterized in that: Two parallel tracks are laid on the patterned steel plates of the first channel and the second channel respectively, the track on the first channel is perpendicular to the track on the second channel, the first sliding trolley and the second sliding trolley both include a trolley frame, a plurality of steel wheels, a plurality of electric motors and a power device, the power device provides power for the electric motor, a plurality of steel wheels matching the corresponding tracks are provided at the bottom of the trolley frame, the electric motor drives the corresponding steel wheels to move along the corresponding tracks, and leveling steel piers and rubber gaskets are provided on the top of the trolley frame from bottom to top; the number of the first sliding trolleys is four, and the electric motors of the four first sliding trolleys achieve synchronous movement under the control of the controller; the number of the second sliding trolleys is four, and the electric motors of the four second sliding trolleys achieve synchronous movement under the control of the controller.

5. The method for rapid transportation of segment beams at a shallow site as claimed in claim 1, characterized in that: The bridge crane is arranged on the installed segmental beam, and includes a main truss, a front fulcrum structure, a walking system, two lifting systems, two hoists and a plurality of telescopic legs. The front fulcrum structure includes an adjustment beam and pads arranged below the two ends of the adjustment beam. The adjustment beam is fixedly arranged below the front of the main truss, the walking system is arranged below the front fulcrum structure, the plurality of telescopic legs are arranged at the bottom of the main truss, the lifting system is arranged on the main truss, and each lifting system includes a lifting mechanism, a steel strand and The wire drum and the lifting mechanism adopt a through-type jack. One end of the steel strand is wound on the wire drum, and the other end of the steel strand is connected to the corresponding hanger after passing through the through-type jack. Two hangers are fixedly connected to the segmental beam to be installed at intervals. The two hangers are evenly arranged on the segmental beam to be installed along the transverse direction of the segmental beam to be installed. The segmental beam to be installed can be lifted and the transverse angle of the segmental beam to be installed can be adjusted through the two lifting mechanisms, so as to realize the suspended docking installation of the segmental beam to be installed and the installed segmental beam, and the movement of the main truss is realized by the walking system.

6. The method for rapid transportation of segment beams at a shallow site as claimed in claim 1, characterized in that: The segment beam hoisting by the bridge crane comprises the following steps: Step S1, installing a bridge crane on the bridge deck for aligning the end of the bridge deck of the segmental beam to be installed, the bridge crane comprising a main truss, a front fulcrum structure, a walking system, two lifting systems, two hoists and a plurality of telescopic legs, the front fulcrum structure comprising an adjustment beam and pads arranged below both ends of the adjustment beam, the adjustment beam is fixedly arranged below the front of the main truss, the walking system is arranged below the front fulcrum structure, the plurality of telescopic legs are arranged at the bottom of the main truss, the lifting system is arranged on the main truss, each lifting system comprises a lifting mechanism, a steel strand and a wire drum, the lifting mechanism adopts a through-type jack, one end of the steel strand is wound around the wire drum, the other end of the steel strand is connected to the corresponding hoist after passing through the through-type jack, the two hoists are fixedly connected to the segmental beam to be installed at intervals, and the two hoists are evenly arranged on the segmental beam to be installed along the transverse direction of the segmental beam to be installed; Step S2, fixing the rear part of the main truss on the bridge deck through the rear anchor system, retracting each telescopic support leg away from the bridge deck, and setting the cushion blocks under both ends of the adjustment beam of the front support structure respectively, and lifting the segmental beam to be installed and adjusting the lateral angle of the segmental beam to be installed through two lifting mechanisms, so as to realize the suspended docking installation of the segmental beam to be installed and the installed segmental beam; Step S3, remove the rear anchor system, and move the main truss to the end of the bridge deck through the walking system, the walking system includes two walking mechanisms, a rear sliding track and a roller arranged at the rear middle position of the main truss, the rear sliding track is arranged on the bridge deck and is located on the moving route of the roller, the two walking mechanisms are respectively arranged under the two ends of the adjustment beam, the projections of the two slides and the rollers on the horizontal plane are distributed in an isosceles triangle, the walking mechanism is perpendicular to the adjustment beam, the walking mechanism includes a slide, a slide and a walking cylinder, the rear sliding track is parallel to the slide, the fixed end of the walking cylinder is connected to one end of the slide, the free end of the walking cylinder is fixedly connected to the adjustment beam, and the adjustment beam is fixedly connected to the slide.

7. The method for using a bridge crane according to claim 5, characterized in that: In step S3, the traveling cylinder moves the main truss to the end of the bridge deck by alternately moving the main truss and the slideway. When the traveling cylinder needs to drive the main truss to move, each telescopic leg is first supported on the bridge deck, the pad of the front fulcrum structure is removed, the rear sliding track is set on the bridge deck and located on the moving route of the roller, and then each telescopic leg is retracted and suspended in the air, so that the front part of the main truss is supported on the corresponding slideway by two sliding seats, and the middle and rear parts of the main truss are supported on the rear sliding track by rollers. The traveling cylinder is extended, the sliding seat moves synchronously on the corresponding slideway, and the roller moves synchronously on the rear sliding track, driving the main truss to move; when the traveling cylinder needs to drive the slideway to move, each telescopic leg is first extended and supported on the bridge deck, the two pads of the front fulcrum structure are respectively set under the two ends of the adjustment beam, the main truss is supported on the bridge deck by the telescopic legs and the front fulcrum structure, and the traveling cylinder is retracted to drive the slideway to move.

8. The method for using a bridge crane according to claim 5, characterized in that: The sling comprises a steel strand joint structure, a main suspension structure, two auxiliary suspension structures and an adjusting jack, wherein the two main suspension structures are arranged at intervals along the transverse direction of the segment beam to be installed, the two main suspension structures are parallel to the longitudinal direction of the segment beam to be installed, the two auxiliary suspension structures are parallel to the transverse direction of the segment beam to be installed, the middle of the top of the two auxiliary suspension structures are respectively connected to the main suspension structure, and the two auxiliary suspension structures are arranged at intervals, the two auxiliary suspension structures are respectively connected to the segment beam to be installed, and the bottom of the steel strand joint structure is hinged to the middle of the top of the main suspension structure The two hoists are evenly arranged on the segmental beam to be installed along the longitudinal direction of the segmental beam to be installed, one end of the adjusting jack is fixedly connected to the top end of the main lifting structure, the other end of the adjusting jack is connected to the upper side of the steel strand joint structure, the steel strand joint structure is coaxially connected to the steel strand, the central axis of the adjusting jack, the central axis of the main lifting frame and the central axis of the steel strand joint structure are located in the same vertical plane, and the angle between the main lifting structure and the steel strand joint structure can be adjusted by adjusting the jack, thereby adjusting the longitudinal angle of the segmental beam to be installed.

9. The method for using a bridge crane according to claim 8, characterized in that: The main hanging structure includes a main hanging frame, a screw, four adjusting nuts, a guide rail and a slider. The guide rail and the screw are arranged on the main hanging frame in parallel. Each of the sliders is provided with a first through hole for the guide rail to pass through and a second through hole for the guide rail to pass through. Two sliders are respectively sleeved on the guide rail through their own first through holes, and two sliders are respectively sleeved on the screw through their own second through holes. Four adjusting nuts are respectively sleeved on the screw, and the internal threads of the four adjusting nuts are respectively matched with the external threads of the screw. An adjusting nut is respectively arranged on both sides of each slider. The slider can move along the guide rail and the screw. The position of the slider on the guide rail can be adjusted by moving the adjusting nuts on both sides of the slider. The two sliders are respectively connected to the middle of the top of the two auxiliary hanging structures.

10. The method for using a bridge crane according to claim 9, characterized in that: The sliders are respectively hinged to the middle of the top of the corresponding auxiliary suspension structure through a cross hinge joint, and the cross hinge joint includes a first pin, a second pin and a middle connector. The upper end of the middle connector is hinged to the slider through the first pin, and the lower end of the middle connector is hinged to the middle of the top of the auxiliary suspension structure through the second pin. The first pin and the second pin are perpendicular to each other, and the auxiliary suspension structure is connected to the segment beam to be installed.

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