A method for installing a flying arch bridge arch rib beam

Abstract

The present application relates to the field of arch bridge construction, and specifically to a method for installing the arch rib cross beam of a swallow-tail arch bridge; the method comprises the following steps: Step 1: selecting a unit segment to be hoisted; Step 2: hoisting the selected unit segment using hoisting equipment; Step 3: hoisting the corresponding unit segment to the bridge site using the hoisting equipment; Step 4: after Step 3 is completed, adjusting the position of the corresponding unit segment, and after the adjustment is completed, installing and fixing the unit segment; Step 5: after Step 4 is completed, the installation of one unit segment is completed; the present application discloses a method for installing the arch rib cross beam of a swallow-tail arch bridge; the disclosed installation method can realize the rapid construction and installation of the arch rib cross beam, and through the cooperation of the hoisting equipment and the auxiliary adjusting device, the precise adjustment of each unit segment in the arch rib cross beam can be realized, greatly ensuring the accuracy and speed of the placement of the arch rib cross beam.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of arch bridge construction, in particular to a method for installing arch rib cross beams of a flying swallow type arch bridge. BACKGROUND

[0002] In the installation and construction process of the steel box arch rib cross beams of the large-span basket type steel box arch bridge, the position transfer of the arch rib cross beams is generally achieved by using hoisting equipment to hoist and transfer the arch rib cross beams. Although the traditional hoisting equipment can hoist and transfer the arch rib cross beams, the traditional hoisting method lacks uniformity, and the operation of each person may deviate, thereby reducing the efficiency of the traditional arch rib cross beam hoisting and transfer.

[0003] Therefore, in order to speed up the hoisting and transfer efficiency of the arch rib cross beams, it is necessary to optimize the existing hoisting and transfer process of the arch rib cross beams.

[0004] Meanwhile, the traditional arch rib cross beam hoisting and transfer lacks an adjusting mechanism, which is not convenient for accurately placing the arch rib cross beams after hoisting, and installation errors may occur during subsequent installation.

[0005] In addition, during the installation and construction process of the steel box arch rib cross beams of the large-span basket type steel box arch bridge, due to the influence of temperature changes and various equipment manufacturing errors, each unit stage of the arch rib cross beams needs to be accurately positioned and its aerial attitude needs to be adjusted before installation, thereby ensuring the accuracy of the installation position of each unit segment.

[0006] The patent document with the publication number CN107338733A disclosed a hoisting device and a hoisting method for aerial attitude adjustment and positioning of steel box arch ribs on November 10, 2017. The aerial attitude of the arch rib beam is adjusted, and the hoist is connected to the arch rib beam through a sling, an adjusting rod, a hoist mechanism, a sling, and a hook. The attitude of the hoist mechanism is adjusted through the adjusting rod, and the attitude of the arch rib beam is adjusted. However, the overall operation of this patent is complicated, the hoisting time of the heavy object is increased, the overall engineering efficiency is reduced, and the practicality is poor. SUMMARY

[0007] The purpose of the present application is to provide an arch rib cross beam installation method with high efficiency and relatively unified operation.

[0008] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0009] A method for installing arch rib cross beams of a flying swallow type arch bridge; the arch rib cross beams include a plurality of unit segments, and adjacent unit segments are connected;

[0010] The installation method includes the following steps:

[0011] Step 1: select the unit section to be hoisted;

[0012] Step 2: the selected unit section is hoisted by the hoisting equipment;

[0013] Step 3: after the hoisting equipment hoists the selected unit section, steering and transportation are carried out, so that the hoisted unit section is transported to the bridge position;

[0014] Step 4: after step 3 is completed, the position of the corresponding unit section is adjusted, and after the adjustment is completed, the unit section is installed and fixed;

[0015] Step 5: after step 4 is completed, the installation of one unit section is completed, and the above steps 1-4 are repeated until each unit section of the arch rib beam is hoisted and installed at the corresponding position.

[0016] In step 1, after the corresponding unit section to be hoisted is selected, an auxiliary adjusting device is installed on the unit section to be hoisted.

[0017] Before step 2 starts, trial hoisting is required. After the hoisting equipment is connected with the corresponding unit section, the hoisting equipment moves, so that the hoisted unit section is suspended and stops for 15 minutes. If the hoisting belt in the hoisting equipment is normal, the corresponding unit section is hoisted and transported again.

[0018] The hoisting equipment adjusts the position of the hoisted unit section, and the hoisting system in the hoisting equipment adjusts the placement position of the hoisted unit section.

[0019] The adjacent unit sections are connected by welding.

[0020] The hoisting system is used for adjusting the placement position of the unit section; the auxiliary adjusting device is connected with an adjusting jack, and the auxiliary adjusting device and the adjusting jack are used for fine adjustment of the arrangement position of the corresponding unit section.

[0021] In step 1, an ear mechanism is arranged on the selected unit section, the ear mechanism comprises an ear main plate, and a lateral stiffening plate is arranged on the side surface of the ear main plate; the ear mechanism is connected with the hoisting equipment.

[0022] Each unit section in the arch rib beam is spliced by a plurality of plate units.

[0023] Before step 4 is carried out, a support pile position for supporting the arch rib beam is arranged at the bridge position.

[0024] The support pile position comprises a plurality of column steel pipes, a pile top plate is arranged on the column steel pipe, and a plurality of stiffening plate pieces are arranged between the pile top plate and the column steel pipe.

[0025] The advantages of the present application are that:

[0026] This invention discloses an installation method for the arch rib crossbeam of a swallow-shaped arch bridge. The installation method disclosed in this invention can realize the rapid construction and installation of the arch rib crossbeam. At the same time, through the combined use of hoisting equipment and auxiliary adjustment devices, the precise adjustment of each unit segment in the arch rib crossbeam can be achieved, which greatly ensures the accuracy and speed of the arch rib crossbeam placement. Attached Figure Description

[0027] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0028] Figure 1 This is a schematic diagram of the arch rib beam structure of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the hoisting system of the present invention when initially connected to the unit segment.

[0030] Figure 3 for Figure 2 A schematic diagram of the hoisting system adjusting its attitude in mid-air after being connected to the unit segment.

[0031] Figure 4 for Figure 2 A schematic diagram of the electrical components of the hoisting system.

[0032] Figure 5 This is an elevation view of the wedge-shaped block of the present invention installed on the top of the steel pipe pile.

[0033] Figure 6 for Figure 5 A cross-sectional view along AA.

[0034] Figure 7 for Figure 5 Sectional view along 1-1.

[0035] Figure 8 for Figure 5 Sectional view along 2-2.

[0036] Figure 9 This is a schematic diagram of the auxiliary adjustment device of the present invention in use.

[0037] Figure 10 This is a partial structural diagram of the steel pipe column in this invention.

[0038] Figure 11 This is a schematic diagram of the lifting lug mechanism in this invention.

[0039] The markings in the above figures are all:

[0040] In the drawings: 1 - floating crane, 1-1 - arch rib cross beam, 1-11 - unit segment, 2 - hook, 3 - connecting sling, 4 - first buckle, 5 - lifting device, 6 - first lug, 7 - second lug, 8 - second buckle, 9 - lifting sling, 10 - third buckle, 11 - lifting lug, 12 - weight, 13 - storage box, 14 - steel rope connecting piece, 15 - traction rope, 16 - traction end; 17, auxiliary adjusting device, 18, support pile position, 17-1, wedge block, 172, arch rib cross beam, 181, stand steel pipe. DETAILED DESCRIPTION

[0041] The specific embodiments of the present application will be further described in detail below with reference to the drawings.

[0042] A method for installing a flying arch bridge arch rib cross beam 1-1; the arch rib cross beam 1-1 comprises a plurality of unit segments 1-11, and adjacent unit segments 1-11 are butt jointed;

[0043] The installation method comprises the following steps:

[0044] Step 1: selecting a unit segment 1-11 to be hoisted;

[0045] Step 2: hoisting the selected unit segment 1-11 by using hoisting equipment;

[0046] Step 3: after the hoisting equipment hoists the selected unit segment 1-11, steering and transporting are performed, so that the hoisted unit segment 1-11 is transported to the bridge position;

[0047] Step 4: after step 3 is completed, the position of the corresponding unit segment 1-11 is adjusted, and after the adjustment is completed, the unit segment 1-11 is installed and fixed;

[0048] Step 5: after step 4 is completed, the installation of one unit segment 1-11 is completed, and the above steps 1-4 are repeated until each unit segment 1-11 of the arch rib cross beam 1-1 is hoisted and installed at the corresponding position.

[0049] The installation method disclosed by the present application is mainly suitable for the installation of the arch rib cross beam 1-1; the arch rib cross beam 1-1 involved in the present application is a multi-segment structure, that is, as stated above, the arch rib cross beam 1-1 of the present application comprises a plurality of unit segments 1-11, here the unit segment 1-11 is only a general term, and in actual use, adjacent unit segments 1-11 can have obvious differences in size and volume, and the present application divides the arch rib cross beam 1-1 into a plurality of unit segments 1-11, which does not mean that the arch rib cross beam 1-1 involved in the present application is a rectangular beam, and the size of each unit segment 1-11 is designed according to actual needs.

[0050] The mounting method disclosed in the application; after the above-mentioned mounting method is disclosed, the hoisting and mounting of each unit segment 1-11 can be realized, and then the hoisting and mounting of the entire arch rib cross beam can be realized.

[0051] Meanwhile, it should be noted here that in actual implementation, each flying swallow-shaped arch bridge has an arch rib cross beam 1-1 at both ends, so in the actual implementation of the application; the two arch rib cross beams 1-1 of the flying swallow-shaped arch bridge can be constructed synchronously on both banks, and the construction sequence is as described above; in fact, through the increase of manpower and equipment, synchronous construction operation of the two arch rib cross beams 1-1 can be realized together.

[0052] In actual use, the hoisting equipment mainly includes a floating crane, and the floating crane is provided, which facilitates the transportation and hoisting of each unit segment 1-11 in the arch rib cross beam 1-1 on the water surface.

[0053] Further, in the step 1 in the application, after the corresponding unit segment 1-11 to be hoisted is selected, an auxiliary adjusting device 17 is installed on the unit segment 1-11 to be hoisted; through the setting of the auxiliary adjusting device 17, the unit segment 1-11 to be constructed can be supported; the stability of the unit segment 1-11 after hoisting is placed on the support pile 18 is ensured, in addition, the auxiliary adjusting device 17 disclosed in the application is used in subsequent use, and a jack can be used to adjust the position of the unit segment 1-11 after hoisting; the accuracy of the position of the unit segment 1-11 during subsequent construction connection is ensured.

[0054] Specifically, the auxiliary adjusting device 17 in the application comprises a wedge-shaped block 1, the wedge-shaped block 1 comprises two side plates 1711 distributed in parallel at intervals, a heightening plate 1712 is arranged between the two side plates 1711, and the heightening plate 1712 is arranged perpendicular to the side plates 1711; the vertical section of the heightening plate 1712 and the two side plates 1711 is H-shaped; a matching inclined surface 111 is arranged on the side plate 1711; through the setting of the auxiliary adjusting device 17, the unit segment 1-11 to be constructed can be supported; the stability of the unit segment 1-11 after hoisting is placed on the support pile 18 is ensured, in addition, the auxiliary adjusting device 17 disclosed in the application is used in subsequent use, and a jack can be used to adjust the position of the unit segment 1-11 after hoisting; the accuracy of the position of the unit segment 1-11 during subsequent construction connection is ensured.

[0055] The auxiliary adjusting device 17 disclosed by the application mainly assists the construction operation of the unit segment 1-11, and mainly comprises a wedge-shaped block 1, which plays a good supporting role, facilitates the support of the unit segment 1-11, and facilitates the support and placement of the unit segment 1-11 after hoisting. In addition, the wedge-shaped block also plays an isolation and protection role. When the position of the unit segment 1-11 is adjusted by the subsequent jack, the jack directly abuts against the wedge-shaped block, avoiding the direct abutment of the jack against the unit segment 1-11 and the damage of the jack to the unit segment 1-11. In addition, the wedge-shaped block 1 comprises two side plates 1711 which are spaced apart and parallel, and the two side plates 1711 are main support plate members and are mainly used for supporting the unit segment 1-11 during subsequent use, thereby ensuring the stability of the placement position of the unit segment 1-11. In addition, a heightening plate 1712 is arranged between the two side plates 1711, the heightening plate 1712 is a reinforcing and connecting plate member, facilitates the connection between the two side plates 1711, and can also increase the structural strength of the entire wedge-shaped block 1. In addition, the arrangement of the heightening plate 1712 facilitates the arrangement and placement of the intermediate plate 1713 and other components in the subsequent process. In the application, the heightening plate 1712 is arranged perpendicularly to the side plate 1711. The vertical section of the heightening plate 1712 and the two side plates 1711 is in H shape. Through such an arrangement, the material discharge inner cavity formed by the side plate 1711 is divided into an upper material cavity 1715 and a lower material cavity 1716. This facilitates the subsequent arrangement of reinforcing members and jacks 1717, facilitates the guarantee of the overall structural strength of the wedge-shaped block 1, and facilitates the subsequent cooperation with the jack 1717 to realize the adjustment of the position of the unit segment 1-11.

[0056] In addition, the side plate 1711 is provided with a fitting inclined surface 111. The arrangement of the fitting inclined surface 111 facilitates the connection between the wedge-shaped block 1 and the unit segment 1-11. In actual use, the wedge-shaped block 1 is fitted on the unit segment 1-11 to be hoisted through the fitting inclined surface 111, which is conducive to guaranteeing the contact area of the wedge-shaped block 1 and the unit segment 1-11 and guaranteeing the stability of the connection between the wedge-shaped block 1 and the unit segment 1-11. In actual connection, the wedge-shaped block 1 and the unit segment 1-11 are generally fixedly connected in a welding manner, and the wedge-shaped block 1 is hoisted together with the unit segment 1-11 during hoisting. This guarantees the linkage of the unit segment 1-11 and the wedge-shaped block 1, facilitates the subsequent adjustment of the position of the wedge-shaped block 1 by the jack 1717, and realizes the adjustment of the position of the unit segment 1-11.

[0057] Further, in the wedge-shaped block 1, the intermediate plate 1713 is arranged on the heightening plate 1712, and the intermediate plate 1713 is arranged in parallel with the side plates 1711; the arrangement of the intermediate plate 1713 serves as an intermediate support plate structure, increases the contact area of the wedge-shaped block 1 and the unit segment 1-11, better guarantees the structural strength of the wedge-shaped block 1, and better guarantees the stability of the connection between the wedge-shaped block 1 and the unit segment 1-11.

[0058] In the present application, the two side plates are arranged at intervals; an intermediate plate is arranged at the center position, and a heightening plate is arranged below the intermediate plate, and the heightening plate is connected with a side plate on each side; the intermediate plate has the same shape as the upper part of the side plate, and the intermediate plate and the side plate are arranged in parallel, and an I-beam is arranged between the intermediate plate and the adjacent side plate.

[0059] Further, in the present application, the two side plates 1711 are symmetrically arranged on both sides of the intermediate plate 1713; and the intermediate plate 1713 and the side plates 1711 are arranged at intervals; through such a design, the subsequent arrangement and placement of the supporting I-beams 1714 can be facilitated; at the same time, through such an arrangement, the wedge-shaped block 1 and the unit segment 1-11 can be connected in multiple places; the connection between the wedge-shaped block 1 and the unit segment 1-11 is better guaranteed.

[0060] Further, in the present application, at least one supporting I-beam 1714 is arranged between the intermediate plate 1713 and the adjacent side plate 1711; the supporting I-beam 1714 serves as a horizontal support, can realize the direct connection between the intermediate plate 1713 and the side plate 1711, and better guarantees the overall structural strength of the entire wedge-shaped block 1.

[0061] Further, in the present application, the side plate 1711 comprises a plate body, an inclined groove is arranged on the plate body, the inclined groove forms a fitting inclined surface 111 on the plate body; the inclined groove is arranged at a corner of the plate body, and the vertical section of the inclined groove is a right-angled triangle; the inclined groove forms the fitting inclined surface 111; the fitting connection between the side plate 1711 and the unit segment 1-11 is facilitated; in the present application, the length of the right-angled side of the inclined groove is less than the length or width of the corresponding side plate 1711; such a design makes the upper end of the side plate 1711 form a trapezoidal structure; based on such a design, the horizontal projection area below the wedge-shaped block 1 can be guaranteed, and the stability of the subsequent arrangement of the wedge-shaped block 1 on the top of the steel pipe pile 3 can be better guaranteed; in the present application, the fitting inclined surface 111 formed by the inclined groove is an inclined surface; such an arrangement can provide a longitudinal and horizontal supporting force for the unit segment 1-11, and better guarantees the stability of the butt joint between the unit segment 1-11 and the adjacent arch rib or bridge deck.

[0062] Further, in the present application, two said side plates 1711 are provided with connecting beams 1718 at one end away from the middle plate 1713; the connecting beams 1718 play a good bridging role, and better ensure the stability of the connection between the two side plates 1711.

[0063] Further, in the present application, the side plate 1711 is provided with a lifting hole; the lifting hole is provided to facilitate the lifting of the wedge-shaped block 1 at the position required in actual use by using a lifting appliance; and then the shifting operation of the wedge-shaped block 1 is facilitated.

[0064] Further, in the present application, before step 2 starts, trial lifting is required; after the lifting equipment is connected with the corresponding unit segment 1-11, the lifting equipment is moved so that the unit segment 1-11 being lifted is suspended, and is stopped for 15 minutes; if the lifting belt in the lifting equipment is normal, the corresponding unit segment 1-11 is continued to be lifted; through such a setting, the present application can reduce the risk of lifting the unit segment 1-11 and reduce the occurrence of construction accidents; at the same time, it is convenient for subsequent observers to observe whether the lifting equipment and the unit segment 1-11 are installed in place; when it is found that the connection between the lifting equipment and the unit segment 1-11 is not firm or is wrong, based on the above steps, replacement or rework can be facilitated.

[0065] Further, in the present application, the lifting equipment adjusts the position of the unit segment 1-11 being lifted, and the lifting system in the lifting equipment adjusts the drop position of the unit segment 1-11 being lifted; in actual use of the present application, through the use of the lifting equipment, the present application can realize the coarse adjustment of the position of the corresponding unit segment 1-11, reduce the actual cost of subsequent fine adjustment, and in addition, through the setting of the lifting system, the present application can better realize the adjustment of the position of the unit segment 1-11.

[0066] As shown in the figure, the hoisting system comprises a floating crane 1, the floating crane 1 is provided with a hook 2, the hook 2 is connected with a lifting spreader 5, the displacement end of the lifting spreader 5 is connected with a unit segment 1-11 through a lifting sling 9; the hoisting system further comprises an electrical assembly for controlling the work of the lifting spreader 5, the length of the displacement end of the lifting spreader 5 is controlled through the electrical assembly, and then the lifting sling 9 with a specific length is selected, the posture of the hoisted unit segment 1-11 in the air is controlled through the overall length of the lifting spreader 5 and the length of the lifting sling 9, so that the user can realize the posture control of the unit segment 1-11 before hoisting, and specifically, in the embodiment, the number of the hooks 2 is two, two lifting spreaders 5 are respectively arranged on each hook 2, the hook 2 is connected with a steel rope on the floating crane 1, the lengths of the four lifting slings 9 are different in the embodiment, and the lengths of the displacement ends of the four lifting spreaders 5 are different when the lifting spreaders 5 are installed; the lifting spreader 5 is flexible to operate, the four lifting spreaders 5 can be used vertically or obliquely, and can be used individually or simultaneously; in addition, the lifting spreader 5 can be manually operated or automatically controlled synchronously; the lifting spreader 5 can be controlled individually or simultaneously.

[0067] In use, the lengths of the displacement ends of the four lifting spreaders 5 are controlled through the electrical assembly, and then the lengths are distributed to different lifting slings 9, the two lifting spreaders 5 are installed on the two sides of one hook 2 respectively, and the four lifting slings 9 are connected to the four ends of the unit segment 1-11 respectively, at this time, the floating crane 1 controls one hook 2 to move upwards, one side of the unit segment 1-11 moves upwards, the hook 2 stops moving and remains stationary, the other hook 2 moves upwards through the work of the floating crane 1, at this time, the other side of the unit segment 1-11 moves upwards, until the heights of the two hooks 2 are the same, at this time, the posture of the unit segment 1-11 in the air is the height required during installation, if there is an error in the posture, the displacement end of the lifting spreader 5 is moved through the electrical assembly to realize fine adjustment; during fine adjustment, the lengths of the lifting slings 9 and the displacement ends are used together to adjust the heights of different ends of the unit segment 1-11, which is convenient and fast, and the floating crane 1 can move the unit segment 1-11 to a specified position for installation and welding; the installation and welding precision of the unit segment 1-11 is high, the length of the steel wire rope or sling is an integer, and when the rigging is matched, the rigging length calculated theoretically cannot be matched, but the length of the displacement end of the lifting spreader 5 is accurately controlled through the electrical assembly, and through cooperation with the lifting sling 9, the rigging value calculated theoretically can be met, and the requirement of accurate positioning is met.

[0068] Specifically, referring to Figure 1 , the lifting spreader 5 comprises a hydraulic cylinder, the upper end of the hydraulic cylinder is provided with a first lug 6, the displacement end of the lifting spreader 5 is a piston, and the piston of the hydraulic cylinder is provided with a second lug 7.

[0069] The first hanging ear 6 is connected with the lifting hook 2 through the connecting sling 3, one end of the connecting sling 3 is sleeved on the lifting hook 2, the other end of the connecting sling 3 is provided with the first buckle 4, the first buckle 4 is connected with the first hanging ear 6, the connection of the lifting hook 2 and the first hanging ear 6 is realized through the connecting sling 3, and the first buckle 3 is in a circular ring shape, the two ends of the first buckle 3 are connected through the fastening bolt, and the fastening bolt is sleeved on the first hanging ear 6.

[0070] The two ends of the lifting sling 9 are respectively sleeved with the second buckle 8 and the third buckle 10, the second buckle 8 is connected with the second hanging ear 7, the second buckle 8 is in a circular ring shape, the two ends of the second buckle 8 are connected through the fastening bolt, and the fastening bolt is sleeved on the second hanging ear 7; the third buckle 10 is connected with the lifting lug 11 on the unit segment 1-11, the third buckle 10 is in a circular ring shape, the two ends of the third buckle 10 are connected through the fastening bolt, and the fastening bolt is sleeved on the lifting lug 11 of the unit segment 1-11.

[0071] The electrical assembly includes a smart case, a concentrator, a wireless access point and an emergency stop receiving box, the smart case is connected with the emergency stop receiving box through a data cable, the wireless access point is electrically connected with the smart case, the emergency stop receiving box is connected with the concentrator through a data cable, the concentrator is connected with the lifting hoist 5 through a combination cable, the concentrator is connected with a main power cable, in use, the concentrator transmits a control signal to the lifting hoist 5, and then the lifting hoist 5 controls the extension length of the displacement end, the smart case and the wireless access point receive external wireless signals; the emergency stop receiving box receives an emergency stop signal, so as to ensure that the emergency stop receiving box receives the emergency stop signal and transmits the emergency stop signal to the concentrator, and then transmits the signal to the lifting hoist 5 through the combination cable, so as to control the emergency stop of the lifting hoist 5; the electrical assembly and the lifting hoist 5 are powered through the main power cable.

[0072] Specifically, the lifting hoist 5 is provided with a high-pressure hydraulic power unit, an oil tank and a control electric box, the control electric box is provided with a controller of the lifting hoist 5, the controller controls the working of the high-pressure hydraulic power unit, and then the oil in the oil tank flows in the hydraulic cylinder, and then the extension length of the piston is controlled, and the controller in the control electric box is connected with the concentrator through the combination cable.

[0073] The electrical assembly further comprises a remote control device, an emergency stop controller and a handle controller. The remote control device is connected with the wireless access point through Wi-Fi. The remote control device sends a Wi-Fi signal, which is received by the wireless access point, to control the lifting spreader 5. The emergency stop controller is connected with the emergency stop receiving box through Wi-Fi. The emergency stop controller sends an emergency stop Wi-Fi signal, which is transmitted to the concentrator to make the lifting spreader 5 stop. The handle controller is connected with the telescopic assembly through a cable. The handle controller is used as a backup device to control the lifting spreader 5 in case of failure of the remote control device. The remote control device is controlled through wireless Wi-Fi with an effective distance of 100 m. The remote control device has real-time visibility, i.e., the oil cylinder stroke size, lifting height and load of each lifting spreader 5 can be seen through the interface of the remote control device.

[0074] Referring to the drawings, the electrical assembly is arranged in the storage box 13. The storage box 13 is provided with a steel wire rope 14 connected with the floating crane 1. The floating crane 1 works to move the storage box 13 and the steel wire rope 14 upward. When working, the storage box 13 moves upward with the lifting spreader 5 to ensure that the electrical assembly in the storage box 13 stably controls the lifting spreader 5.

[0075] Referring to the drawings, the storage box 13 is provided with a traction rope 15. The traction rope 15 is provided with a movable traction end 16. When the unit segment 1-11 is hoisted on the wharf, the traction end 16 can be moved. The traction end 16 moves to realize that the storage box 13 does not affect the lifting spreader 5 and the unit segment 1-11 under the connection of the traction rope 15.

[0076] In specific use, the hoisting system is used. The specific steps are as follows:

[0077] Step 1, check the lifting spreader 5. Place the lifting spreader 5 on a semitrailer for transportation. After transportation to a designated position, take the lifting spreader 5 off the semitrailer. Specifically, when detecting the lifting spreader 5, the specific contents of the inspection are as follows: check whether the hydraulic pump of the lifting spreader 5 leaks oil, whether the oil tank leaks oil, whether the bolts on the oil tank are tightened, whether the valves and valve groups on the lifting spreader 5 leak oil, whether the bolts on the valves and valve groups are tightened, whether the bolts on the breather cap on the lifting spreader 5 are tightened, and whether the protective shell on the lifting spreader 5 is damaged.

[0078] Step 2, the lifting hanger 5 is connected with the electrical assembly, the piston of the four lifting hangers 5 is controlled respectively through the remote control device, at this time, the first hanging ear 6 on one end of the lifting hanger 5 is connected with the first buckle 4, the connecting sling 3 is sleeved on the hook 2, the second hanging ear 7 on the piston end of the lifting hanger 5 is connected with the second buckle 8, at this time, the lifting sling 9 is sleeved on the second buckle 8, the lifting sling 9 is sleeved on the third buckle 10, and then the third buckle 10 is connected with the lifting lug 11 on the unit segment 1-11, at this time, the connecting sling 3 on the two lifting hangers 5 is sleeved on the hook 2, so that the two lifting hangers 5 are connected on the two hooks 2 of the floating crane 1 respectively, and the four third buckles 10 are connected with the four lifting lugs 11 on the unit segment 1-11 respectively;

[0079] Step 3, the electrical assembly is stored in the storage box 13, the storage box 13 is connected with the steel rope connecting piece 14, the steel rope connecting piece 14 is connected with the floating crane 1, the traction rope 15 is connected at the bottom end of the storage box 13, and the traction rope 15 is connected with the traction end 16, and the floating crane 1 works to lift the entire storage box 13 to the air;

[0080] Step 4, the floating crane 1 works, so that one hook 2 moves upward, and then the two lifting hangers 5, the connecting sling 3 and the lifting sling 9 on the hook 2 move upward, so that one end of the unit segment 1-11 moves upward, and the unit segment 1-11 is inclined, at this time, the hook 2 remains stationary;

[0081] Step 5, the floating crane 1 works, so that the other hook 2 moves upward, and then the two lifting hangers 5, the connecting sling 3 and the lifting sling 9 on the other hook 2 move upward, so that the other end of the unit segment 1-11 moves upward, and the other end of the unit segment 1-11 moves upward to the height of the hook 2 in step 4;

[0082] Step 6, the floating crane 1 works to move the two hooks 2 upward at the same time, at this time, the unit segment 1-11 is moved as a whole to the position that the lowest end of the unit segment 1-11 is 1500mm away from the ground, whether the unit segment 1-11 in the air meets the requirements is observed, if it meets the requirements, the entire unit segment 1-11 is moved to the specified position for installation through the floating crane 1; if it does not meet the requirements, the piston of the four lifting hangers 5 is controlled through the remote control device to make fine adjustment until it meets the requirements, and after meeting the requirements, the entire unit segment 1-11 is moved to the specified position for installation through the floating crane 1;

[0083] Step 7, in the process of steps 4, 5 and 6, the traction end 16 moves to move the traction rope 15, and then the entire storage box 13 is inclined to ensure that the storage box 13 does not affect the work of the lifting hanger 5.

[0084] Further, in the present application, the adjacent unit segments 1-11 are connected by welding; such a connection method facilitates the connection between adjacent unit segments 1-11; in actual connection, it is required that the adjacent unit segments 1-11 are connected by girth welding; in actual implementation, it is required that the girth welding construction sequence is as follows: top plate butt joint → bottom plate butt joint → web butt joint → stiffening rib embedding (here, the stiffening rib is a reinforcing plate structure on each unit segment); in actual welding, it is required that the top plate welding is from the center to both sides; the bottom plate welding is from the center to both sides; the web welding is from the bottom to the top; by using the above welding sequence, the welding stress can be well avoided.

[0085] Further, in the present application, a hoisting system is used for adjusting the placement position of the unit segments 1-11; the preliminary adjustment of the unit segments 1-11 is realized; the auxiliary adjusting device 17 is externally connected with an adjusting jack, and the auxiliary adjusting device 17 and the adjusting jack are used for fine adjustment of the arrangement position of the corresponding unit segments 1-11; in the present application, the auxiliary adjusting device 17 is matched with a jack 1717; here, the jack is generally a three-way jack; two side plates 1711 are spaced apart to form a discharging inner cavity, a heightening plate 1712 is arranged between the two side plates 1711, and the heightening plate 1712 divides the discharging inner cavity into an upper feeding cavity 1715 and a lower feeding cavity 1716; the jack 1717 is arranged on the support pile position 18 below, that is, on each stand column steel pipe 181 in the support pile position 18; and is arranged in the lower feeding cavity 1716 of the auxiliary adjusting device 17; the jack 1717 of the present application is mainly used for subsequent use by pushing the wedge-shaped block 1, so that the wedge-shaped block 1 drives the unit segments 1-11 to move, thereby realizing the adjustment of the position of the unit segments 1-11; in addition, in the present application, the jack 1717 is a three-way jack 1717, so that the spatial position of the unit segments 1-11 can be changed as needed in actual use; at the same time, in order to facilitate the cooperation of the jack 1717 and the wedge-shaped block 1, the jack 1717 is arranged below the wedge-shaped block 1 and above the top of the steel pipe pile, and the pushing of the wedge-shaped block 1 is realized by the operation of the jack 1717 itself, and finally the adjustment of the position of the unit segments 1-11 is realized; in summary, it can be known that the cooperation of the hoisting equipment and the auxiliary adjusting device 17 can realize the accurate adjustment of each unit segment 1-11 in the arch rib beam 1-1, and greatly guarantees the accuracy and speed of the placement of the arch rib beam 1-1.

[0086] Further, in the application, in the step 1, the lifting lug mechanism 1-2 is arranged on the selected unit segment 1-11, the lifting lug mechanism 1-2 comprises a lifting lug main plate 1-21, and the side of the lifting lug main plate 1-21 is provided with a lateral stiffening plate 1-22; the lifting lug mechanism 1-2 is connected with the hoisting equipment; through the arrangement of the lifting lug main plate 1-21 and the lateral stiffening plate 1-22, the strength of the lifting lug mechanism 1-2 is greatly improved, and the stability of the subsequent connection with the hoisting equipment is facilitated; in actual arrangement, four lifting lug mechanisms 1-2 are arranged on one unit segment 1-11 and are distributed at the four corners of the unit segment 1-11.

[0087] Through the arrangement of the lifting lug mechanism, the hoisting position of the unit segment in the arch rib beam can be determined, and the overturning operation during the transportation of the unit segment is reduced.

[0088] Further, in the application, each unit segment 1-11 in the arch rib beam 1-1 is spliced by a plurality of plate units; such an arrangement facilitates the assembly of each unit segment 1-11, and in turn facilitates the actual construction operation of the arch rib beam 1-1.

[0089] Further, in the application, before the step 4 is performed, the support pile position 18 for supporting the arch rib beam 1-1 is arranged at the bridge position; through the arrangement of the support pile position 18, the subsequent placement of each unit segment 1-11 is facilitated, the subsequent fine adjustment is facilitated, and the subsequent welding construction is also facilitated; through the arrangement of the support pile position 18, a construction platform is established on the water, and the subsequent construction operation of each unit segment 1-11 is facilitated.

[0090] In the application, the support pile position comprises a plurality of column steel pipes 181, and the column steel pipe 181 is actually a steel pipe pile structure; a pile top plate 182 is arranged on the column steel pipe 181, the arrangement of the pile top plate 182 increases the lateral area of the column steel pipe 181, and facilitates the subsequent placement of the unit segment 1-11; in addition, a plurality of stiffening plate pieces 183 are arranged between the pile top plate 182 and the column steel pipe 181 in the application; the stiffening plate piece 183 plays a role in increasing the strength and ensuring the overall structural strength of the pile top plate 182.

[0091] Further, the auxiliary adjusting device 17 in the application further comprises a pile top steel plate 31; the pile top steel plate 31 is connected with the wedge-shaped block 1 and the pile top plate 182 respectively; in the application, the pile top steel plate 31 is a plate member structure fixed subsequently, mainly used as a connecting member after the position adjustment of the unit segment 1-11 by the subsequent jack 1717 is completed, to realize the connection between the wedge-shaped block 1 and the pile top of the steel pipe pile 3, thereby realizing the fixation of the wedge-shaped block 1 on the pile top, and then realizing the fixation of the position of the unit segment 1-11, thereby facilitating the butt joint between the subsequent unit segment 1-11 and the adjacent component, and ensuring the accuracy of the butt joint between the unit segment 1-11 and the adjacent component.

[0092] Specifically:

[0093] The installation of the arch rib cross beam 1-1 adopts the construction method of “support pile position 18 + floating crane sectional hoisting”.

[0094] The support pile position 18 is built by steel pipes and sectional steel, and the arch rib cross beam 1-1 is hoisted by the floating crane to the support for welding and assembly.

[0095] Steel structure assembly fields are arranged on both banks, arch feeding wharfs are arranged on both sides of the banks, the plate units are transported to the assembly fields to be assembled into segments, and then the module vehicles are used to transport the segments to the arch feeding wharfs, the unit segments 1-11 are hoisted by the floating crane to the bridge position at the wharf, the floating crane is positioned, the arch is taken, and the arch rib cross beam 1-1 is hoisted.

[0096] Two 610t land transport assembly type floating cranes are arranged for hoisting the arch rib cross beam 1-1 in actual construction, the No.1 floating crane is arranged on the south side of the bridge position, and the No.2 floating crane is arranged on the north side of the bridge position.

[0097] The segments of the arch rib cross beam 1-1 are assembled by the plate units at the assembly fields on the east and west banks, and then the segments are taken out of the molds, and transported to the south and north wharfs on the west bank by the module vehicles.

[0098] The wharf on the south side of the west bank adopts the steel pipe Bailey beam support structure form with a length of 27m and a width of 15.5m, and the wharf on the north side of the west bank adopts the hardening of the access road.

[0099] The trestle is painted with marks to ensure that the transport vehicles walk on the specified route.

[0100] The lowest water level for hoisting the arch rib cross beam 1-1 is designed as +39m, and the segments are hoisted by the 610t floating crane with a 90m hoisting rod.

[0101] The construction steps are illustrated by taking one of the unit segments 1-11 XL1Z of the arch rib cross beam 1-1 as an example, and the construction of the remaining segments refers to this chapter.

[0102] Step one of the construction: the trial hoisting should be carried out when hoisting, the lifting is 10cm, and the lifting belt, steel wire rope and lifting lug lifting appliance are observed for 15min;

[0103] Construction step two: the floating crane approaches the arch pier; after anchoring and fixing, the segment is taken out;

[0104] When lifting the unit segment 1-11, the floating crane uses a 90m hoist, with a lifting height of 81m, a horizontal distance of 34m, a maximum lifting load of 310t, and the heaviest arch rib beam 1-1 of 180.4t, with a load rate of 58%, meeting the construction requirements.

[0105] Construction step three: the floating crane turns after lifting the unit segment 1-11.

[0106] Construction step four: the floating crane is transported to the bridge site.

[0107] Construction step five: the floating crane transports the unit segment 1-11 to the bridge site, installs the unit segment 1-11, and finally forms the corresponding arch rib beam 1-1.

[0108] When lifting the XL1Z segment, the floating crane uses a 90m hoist, with a lifting height of 81m, a horizontal distance of 34m, a maximum lifting load of 310t, and the heaviest arch rib of 180.4t, meeting the construction requirements.

[0109] The lifting tool is composed of four hydraulic cylinders and is designed to level the load.

[0110] The four hydraulic cylinders of the system allow a load of up to 600 tons, with a stroke of 1.5m, and dimensions of 3.11x0.42x0.955m in length, width and height.

[0111] The 610t floating crane uses double hooks to lift the corresponding unit segment 1-11, and four lifting points are provided on each unit segment 1-11. The lifting lugs are arranged along the transverse direction of the bridge, and are in the form of lug plate pin holes, welded at the position of the transverse bulkhead in the upper arch rib. The lifting tool is a custom-made lifting tool for adjusting the spatial posture of the arch rib, and a 200t synthetic fiber lifting belt (6 times safety factor) + a snap ring, with an angle between the lifting belt and the plane of not less than 60o.

[0112] The snap ring is of type GB / T25854-6-DX200.

[0113] To avoid lateral bending moment on the lug plate, the lug plate is arranged along the transverse direction of the upper arch rib, and the lug plate main plate is butt welded with the upper arch rib transverse bulkhead in full penetration. The lug lateral stiffening rib is welded with the lug plate main plate in a penetration angle weld, with a weld leg size of 12mm.

[0114] Obviously, the specific implementation of the present application is not limited by the above-mentioned manner, and various non-essential improvements using the method concept and technical solution of the present application are within the protection scope of the present application.

Claims

1. A method for installing a flying arch bridge rib beam, characterized in that, the rib beam comprises a plurality of unit segments, and adjacent unit segments are butt jointed; the installation method comprises the following steps: Step 1: selecting a unit segment to be hoisted; Step 2: hoisting the selected unit segment by using a hoisting device; after selecting the corresponding unit segment to be hoisted, an auxiliary adjusting device is installed on the unit segment to be hoisted; Step 3: after the hoisting device hoists the selected unit segment, steering and transportation are performed, so that the hoisted unit segment is transported to the bridge position; the hoisting device comprises a hoisting system; the hoisting system comprises a floating crane (1), the floating crane (1) is provided with a hook (2), the hook (2) is connected with a lifting spreader (5), the displacement end of the lifting spreader (5) is connected with the unit segment through a lifting sling (9); further comprising an electrical assembly for controlling the work of the lifting spreader (5); the length of the displacement end of the lifting spreader is controlled by the electrical assembly, and then a lifting sling with a specific length is selected, and the posture of the hoisted unit segment in the air is controlled by the overall length of the lifting spreader and the length of the lifting sling; the lifting spreader (5) comprises a hydraulic cylinder, the upper end of the hydraulic cylinder is provided with a first lug (6), the displacement end of the lifting spreader is a piston, and the piston of the hydraulic cylinder is provided with a second lug; the first lug is connected with the hook through a connecting sling, one end of the connecting sling is sleeved on the hook, the other end of the connecting sling is provided with a first buckle, the first buckle is connected with the first lug, the connection between the hook and the first lug is realized through the connecting sling, and the first buckle is annular, the two ends of the first buckle are connected through a fastening bolt, and the fastening bolt is sleeved on the first lug; the two ends of the lifting sling are respectively sleeved with a second buckle and a third buckle, the second buckle is connected with the second lug, the second buckle is annular, the two ends of the second buckle are connected through a fastening bolt, and the fastening bolt is sleeved on the second lug; the third buckle is connected with the lifting lug on the unit segment, the third buckle is annular, the two ends of the third buckle are connected through a fastening bolt, and the fastening bolt is sleeved on the lifting lug of the unit segment; the hoisting method based on the hoisting system comprises the following steps: the specific steps are: S1, check the lifting spreader (5), place the lifting spreader (5) on a semitrailer for transportation, and after transportation to the specified position, take down the lifting spreader (5) from the semitrailer; S2, the lifting hanger (5) is connected with the electrical assembly, the piston of the four lifting hangers (5) is controlled respectively through the remote control device, at this time, the first hanging ear (6) on one end of the lifting hanger (5) is connected with the first buckle (4), the connecting sling (3) is sleeved on the hook (2), the second hanging ear (7) of the piston end of the lifting hanger (5) is connected with the second buckle (8), at this time, the lifting sling (9) is sleeved on the second buckle (8), the lifting sling (9) is sleeved on the third buckle (10), and then the third buckle (10) is connected with the lifting lug (11) on the unit segment, at this time, the connecting sling (3) on the two lifting hangers (5) is sleeved on the hook (2), so that the two hooks (2) on the floating crane (1) are connected with two lifting hangers (5) respectively, and four third buckles (10) are connected with four lifting lugs (11) on the unit segment respectively; S3, the electrical assembly is stored in the storage box (13), and the storage box (13) is connected with the steel rope connecting piece (14), the steel rope connecting piece (14) is connected with the floating crane (1), the traction rope (15) is connected at the bottom end of the storage box (13), and the traction rope (15) is connected with the traction end (16), the floating crane (1) works to lift the entire storage box (13) to the air; S4, the floating crane (1) works, so that one hook (2) moves up, and then the two lifting hangers (5), the connecting sling (3) and the lifting sling (9) on the hook (2) move up, so that one end of the unit segment moves up, and the unit segment is inclined, at this time, the hook (2) remains stationary; S5, the floating crane (1) works, so that the other hook (2) moves up, and then the two lifting hangers (5), the connecting sling (3) and the lifting sling (9) on the other hook (2) move up, so that the other end of the unit segment moves up, and the other hook (2) is consistent with the hook (2) in S4; S6, the floating crane (1) works to move the two hooks (2) up at the same time, at this time, the unit segment is moved to the lowest end of the unit segment, and the distance from the ground is 1500mm, whether the unit segment in the air meets the requirements is observed, if it meets the requirements, the entire unit segment is moved to the specified position for installation through the floating crane (1); if it does not meet the requirements, the pistons of the four lifting hangers (5) are controlled through the remote control device to make fine adjustment until it meets the requirements, and after meeting the requirements, the entire unit segment is moved to the specified position for installation through the floating crane (1); S7, in the process of steps S4, S5 and S6, the traction end (16) moves to move the traction rope (15), and then the entire storage box (13) is inclined, so as to ensure that the storage box (13) does not affect the work of the lifting hanger (5); Meanwhile, support pile positions for supporting arch rib cross beams are arranged at bridge positions; The support pile position comprises a plurality of column steel pipes, a pile top plate is arranged on the column steel pipe, and a plurality of stiffening plate pieces are arranged between the pile top plate and the column steel pipe; Step 4: after step 3 is completed, the position of the corresponding unit segment is adjusted, and after the adjustment is completed, the unit segment is installed and fixed; The hoisting equipment adjusts the position of the hoisted unit segment, and a hoisting system in the hoisting equipment adjusts the placement position of the hoisted unit segment; The hoisting system is used for adjusting the placement position of the unit segment, and the auxiliary adjusting device is externally connected with an adjusting jack, and the auxiliary adjusting device and the adjusting jack are used for fine adjustment of the placement position of the unit segment; Step 5: after step 4 is completed, the installation of one unit segment is completed, and steps 1-4 are repeated until each unit segment of the arch rib beam is hoisted and installed at the corresponding position.

2. The installation method of the flying arch bridge rib beam according to claim 1, characterized in that, Before step 2 starts, a trial hoisting is required, the hoisting equipment is connected with the corresponding unit segment, the hoisting equipment is moved, the hoisted unit segment is suspended, and is stopped for 15 minutes, and if the hoisting belt in the hoisting equipment is normal, the corresponding unit segment is hoisted and transported.

3. The installation method of the flying arch bridge rib beam according to claim 1, characterized in that, The adjacent unit segments are connected by welding.

4. The installation method of the flying arch bridge rib beam according to claim 1, characterized in that, In step 1, an ear mechanism is arranged on the selected unit segment, the ear mechanism comprises an ear main plate, and a lateral stiffening plate is arranged on the side surface of the ear main plate; and the ear mechanism is connected with the hoisting equipment.

5. The method of installing a flying buttress rib beam of a flying buttress arch bridge according to claim 1, wherein Each unit segment in the arch rib beam is spliced by a plurality of plate units.

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