Multi-dimensional intelligent auxiliary positioning and integral lifting construction method for large-span wide-width steel box girder

Abstract

The invention belongs to the technical field of steel box girder lifting, and discloses a large-span wide-width steel box girder multi-dimensional intelligent auxiliary positioning and integral lifting construction method which comprises the following steps: S1, a girder transporting ship for transporting a steel box girder travels to a stern and stays on a corresponding bridge pier side, and anchor dropping is carried out for stern initial positioning; s2, a Beidou / GPS dual-mode positioning instrument and a total station capable of establishing three-dimensional coordinate monitoring are set up to monitor the position of the steel box girder in real time, and the tugboat drags the bow of the girder transporting ship to rotate to achieve ship crossing; s3, adjusting the position of the bow of the beam transporting ship through traction of the tugboat and winding and unwinding of a winch cable, and anchoring and positioning the bow of the beam transporting ship; s4, the position of the stern of the beam transporting ship is adjusted through traction of the tugboat and winding and unwinding of a winch cable, and the stern of the beam transporting ship is anchored and positioned; and S5, a steel box girder bridge floor crane correspondingly installed on the bridge floor lowers a lifting rope to be connected with lifting points at the two ends of the steel box girder, and lifting is conducted. The method has the advantages that multi-dimensional auxiliary accurate positioning is achieved, the steel box girder is overall lifted, the engineering quality is improved, and construction safety is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel box girder hoisting, and particularly relates to a multi-dimensional intelligent auxiliary positioning and overall hoisting construction method for long-span wide-width steel box girders. Background Art

[0002] For general steel box girder installation, a process method of segmental processing and installation is adopted. The construction procedures are complex and the construction time is long, which greatly affects the construction progress. It will require high construction site construction requirements and large equipment investment, and the construction has certain limitations. If the process method of hoisting the entire box of long-span steel box girders is adopted, it is necessary to finely adjust the position of the beam carrier ship for transporting ten-thousand-ton steel box girders, and it is necessary to ensure that the center line of the steel box girder is basically coincident with the center line of the bridge. Otherwise, the steel box girder is prone to the pendulum effect due to oscillation during hoisting, posing a great safety hazard. At present, it is impossible to achieve precise positioning for long-span wide-width 100-meter steel box girders in China, nor can it meet the construction requirements of complex bridges. Summary of the Invention

[0003] The present invention aims to provide a multi-dimensional intelligent auxiliary positioning and overall hoisting construction method for long-span wide-width steel box girders, with high construction efficiency and fine adjustment of the position of the steel box girder before hoisting, solving the problem that the overall hoisting and installation of long-span wide-width 100-meter steel box girders cannot finely adjust the position of the steel box girder at present, resulting in a great safety hazard due to the pendulum effect caused by oscillation during hoisting.

[0004] For this purpose, the technical solution adopted by the present invention is as follows: A multi-dimensional intelligent auxiliary positioning and overall hoisting construction method for long-span wide-width steel box girders, comprising the following steps:

[0005] Step S1: The beam carrier ship for transporting the steel box girder sails to the stern and stays on the side of the corresponding bridge pier. Then, the cable of the winch at the stern of the beam carrier ship is connected to the corresponding pier column, and an anchor is dropped for initial positioning of the stern.

[0006] Step S2: A Beidou / GPS dual-mode positioning instrument and a total station capable of establishing three-dimensional coordinate monitoring are set up to monitor the position of the steel box girder in real time. The tugboat is first connected to the bow of the beam carrier ship, and the bow of the beam carrier ship is rotated by towing to achieve a crosswise ship.

[0007] Step S3: The cable of the winch at the bow of the beam carrier ship is connected to the corresponding pier column. Then, according to the monitored position data of the steel box girder, the position of the bow of the beam carrier ship is adjusted by the towing of the tugboat and the retraction and release of the winch cable. When adjusted to the designed position (the vertical projection distance between the bow end point of the beam carrier ship on the center line and the center line of the bridge is within 1 m), the bow of the beam carrier ship is anchored for positioning.

[0008] Step S4, retract the anchor used for initial positioning at the stern, and then adjust the stern position of the beam transport ship by traction of the tugboat and retraction and extension of the winch cable according to the monitoring position data of the steel box girder. When the center line of the beam transport ship is adjusted to be aligned with the center line of the bridge within the design error range (the vertical projection distance between the stern end point of the beam transport ship on the center line and the same plane of the bridge center line is within 1m), the beam transport ship is anchored at the stern for positioning;

[0009] Step S5, the tugboat drives to the side of the beam transport ship located in the turbulent water area to tow the ship to stabilize the hull, and at the same time, according to the monitoring position data of the steel box girder, the anchor chain and the winch cable are retracted and released to adjust the position of the beam transport ship, so that the longitudinal and lateral position errors of the steel box girder are controlled within the centimeter level. Then, the bridge crane corresponding to the steel box girder installed on the bridge deck lowers the lifting rope to connect with the lifting points at both ends of the steel box girder, and the lifting is carried out after adjusting the progress and load of each lifting point.

[0010] As a preferred embodiment of the above scheme, in step S3, two tugboats are used and are respectively located on the upper and lower sides of the bow of the beam transport ship to connect and push and pull, taking the hull into consideration.

[0011] More preferably, in step S4, two tugboats are used and are respectively located at the upstream and downstream sides of the stern of the beam transport ship to connect and perform push-pull traction.

[0012] More preferably, in step S5, two tugboats are used and are respectively located on the upper and lower sides of the hull of the beam transporting ship to connect for pushing, pulling and traction.

[0013] Further preferably, in step S2, Beidou / GPS dual-mode locators are evenly distributed along the center line of the steel box girder, the total stations are built on the sidewalks corresponding to each other, and the intelligent locators are reasonably placed.

[0014] It is further preferred that, in the steps S3 and S4, the bow and stern of the beam transport ship are anchored and positioned using an "eight" anchor, which has a large mooring force, reduces the ship's swaying, and has strong stability. It is suitable for complex environments such as strong wind attacks, rapid water flow, poor bottom quality, or typhoon resistance anchoring; the tugboat adopts 3000 horsepower to 4000 horsepower to ensure the pulling force of the bow and stern of the beam transport ship, and the cable of the winch at the bow and stern of the beam transport ship is connected to the corresponding side pier steel cofferdam, and with the help of the steel cofferdam of the pier, the cost and time of building additional winch cable connection anchoring points are effectively saved.

[0015] Further preferably, in the step S5, the steel box girder deck crane includes at least three groups of first diamond truss components arranged in parallel. The first diamond truss components are connected by a connecting component. A front upper cross beam is arranged at the front end above the first diamond truss components. A hoist for hoisting the bridge is arranged on the front upper cross beam. A transverse connecting rod for connecting the first diamond truss components is arranged horizontally below the front upper cross beam. The steel box girder deck crane further includes a group of second diamond truss components arranged in parallel on the left side of the leftmost first diamond truss component and a group of second diamond truss components arranged in parallel on the right side of the rightmost first diamond truss component. The second diamond truss components and the adjacent first diamond truss components are connected by cross braces. At least three sets of horizontal bracings for increasing the overall strength are additionally arranged horizontally between the first diamond truss components. A front upper cross beam is additionally arranged on the second diamond truss components. The two front upper cross beams are arranged in parallel, and a cushion beam for installing the hoist is arranged above them.

[0016] By adding the second diamond truss components, the overall stability of the hoisting equipment is improved. A front upper cross beam is additionally arranged on the second diamond truss components, and a cushion beam is arranged on the two front upper cross beams for installing the hoist, which improves the strength and stiffness of the equipment. The steel box girder can be lifted as a whole, thereby reducing the frequency of high-altitude operations, lowering the safety risks, and making the lifting process more efficient, reducing the construction period. The hoist can accurately control the hoisting force and speed to ensure the smooth placement of the steel box girder.

[0017] Further preferably, the second diamond truss components and the first diamond truss components have the same shape and size. The second diamond truss components and the first diamond truss components both include upper horizontal bars, lower horizontal bars, front inclined bars, rear inclined bars, and vertical bars. Each bar is pinned by a pin with a diameter of 169 mm and made of 45# steel. The upper horizontal bar, lower horizontal bar, front inclined bar, and rear inclined bar are connected to form a diamond shape, and the vertical bar is connected at the diagonal of the diamond.

[0018] Further preferably, the connecting component includes upper chord bars and lower chord bars arranged in parallel. The upper chord bars are arranged at the connection between the top of the vertical bar and the end of the upper horizontal bar, and the lower chord bars are arranged in the middle of the vertical bar. Vertical web members arranged vertically and inclined web members arranged obliquely are arranged at intervals between the upper chord bars and the lower chord bars. The upper chord bars and the lower chord bars are made of 220×220×10 mm square steel, and the vertical web members and the inclined web members are made of 150×150×6 mm square steel, with the material being Q345B. The connecting component is bolted to the first diamond truss component. The horizontal bracings are respectively arranged in the middle of the upper horizontal bar, the middle of the lower horizontal bar, and the end of the vertical bar. The second diamond truss components are provided with cross braces corresponding to the connections between the first diamond truss components and the horizontal bracings, as well as the upper chord bars and the lower chord bars of the connecting component.

[0019] Further preferably, the number of the hoisting machines is five, with two arranged at the front and rear on both sides of the front upper cross beam and one arranged in the middle. The hoisting machines adopt 200t hydraulic continuous jacks, and the jacks use 15×7-φs15.2 steel wire ropes to hoist the steel box girder. Channels for connecting the steel wire ropes to the steel box girder are provided on the second diamond truss assembly, the first diamond truss assembly and the front upper cross beam; a connecting rod is arranged at intervals between the transverse connecting rod and the bracing between the middle parts of the upper horizontal rods.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) Compared with the current situation that the position of the steel box girder cannot be finely adjusted during the overall lifting and installation of the steel box girder with a large span and a width of 100 meters, this solution adopts multi-dimensional auxiliary positioning means of tugboat collaborative control, self-owned ship anchor system and winch cable retraction and release linkage to achieve precise positioning of the bow and stern of the beam-carrying ship. Through on-site testing, it is found that the position error of the steel box girder can be controlled within 10 cm by using this method, breaking through the bottleneck of traditional waterborne positioning accuracy, and realizing the centimeter-level dynamic adjustment ability of the transverse ship attitude of ten-thousand-ton ships and the whole 100-meter steel box girder under complex river hydrological conditions. The concept is novel and provides a new technical solution for the waterborne hoisting of steel box girders of long-span bridges.

[0022] (2) In the construction of 100-meter-class steel box girder projects, the overall synchronous lifting technology is adopted for the first time to realize the overall installation of the steel box girder, completely breaking through the traditional construction mode of segment-by-segment hoisting. Through the innovative process of overall synchronous lifting, the amount of high-altitude operation is significantly reduced by more than 80%, the intensity of on-site high-altitude welding operation is effectively reduced, and the cumulative error problem that may occur in segmental installation is fundamentally avoided. Engineering practice shows that while significantly improving the project quality and construction safety, this technology greatly shortens the construction period and effectively reduces the construction risk.

[0023] (3) First, an anchor is dropped for the initial positioning of the stern of the beam-carrying ship, and then a tugboat is used for traction and the winch cable is retracted and released to accurately position the bow and stern of the beam-carrying ship in sequence, and an anchor is dropped for positioning after the positioning, so as to ensure that the center line of the steel box girder is basically coincident with the center line of the bridge, effectively avoiding the pendulum effect caused by the oscillation of the steel box girder during the hoisting of the steel box girder deck crane, eliminating potential safety hazards, and ensuring the safety of the staff and the stability of the equipment.

[0024] (4) The real-time feedback closed-loop control technology that innovatively combines Beidou / GPS dual-mode positioning and total station three-dimensional coordinate monitoring is adopted to break through the bottleneck of traditional waterborne positioning accuracy, realize the centimeter-level dynamic adjustment ability of the transverse ship attitude of ten-thousand-ton ships and the whole 100-meter steel box girder under complex river hydrological conditions, ensure that the longitudinal and transverse positioning errors are controlled within centimeters, realize intelligent auxiliary positioning, and provide a new technical solution for the waterborne hoisting of steel box girders of long-span bridges.

[0025] In summary, the present invention has the advantages of multi-dimensional auxiliary precise positioning, integral lifting of steel box girders, improvement of construction quality, and guarantee of construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the beam carrier ship traveling to the stern and staying beside the corresponding bridge pier in step S1.

[0027] Figure 2 It is a schematic diagram of the cable of the winch at the stern of the beam carrier ship being connected to the pier column on the corresponding side in step S1.

[0028] Figure 3 It is a schematic diagram of step S2.

[0029] Figure 4 It is a schematic diagram of adjusting the bow position of the beam carrier ship by towing with a tugboat and retracting and releasing the cable of the winch in step S3.

[0030] Figure 5 It is a schematic diagram of the bow of the beam carrier ship being anchored and positioned after adjustment in step S3.

[0031] Figure 6 It is a schematic diagram of adjusting the stern position of the beam carrier ship by towing with a tugboat and retracting and releasing the cable of the winch in step S4.

[0032] Figure 7 It is a schematic diagram of the stern of the beam carrier ship being anchored and positioned after adjustment in step S4.

[0033] Figure 8 It is a schematic diagram of the tugboat traveling to the side of the beam carrier ship located in the water turbulence area and towing to stabilize the hull in step S5.

[0034] Figure 9 It is a schematic diagram of the working state of the steel box girder deck crane Figure One .

[0035] Figure 10 It is a schematic diagram of the working state of the steel box girder deck crane Figure Two .

[0036] Figure 11 It is a schematic diagram of the structure of the steel box girder deck crane. DETAILED DESCRIPTION OF THE INVENTION

[0037] The present invention will be further described below through embodiments in conjunction with the drawings:

[0038] Combined with Figure 1 — Figure 11 As shown, a multi-dimensional intelligent auxiliary positioning and integral lifting construction method for long-span wide-width steel box girders is as follows in specific implementation steps:

[0039] Step S1: The beam transport ship 1 carrying the steel box girder sails to the stern and stays beside the corresponding bridge pier. Then, the cable of the winch at the stern of the beam transport ship 1 is connected to the pier column on the corresponding side, and an anchor is dropped for initial positioning of the stern.

[0040] Step S2: A Beidou / GPS dual-mode positioning instrument and a total station capable of establishing three-dimensional coordinate monitoring are set up to monitor the position of the steel box girder in real time. The tugboat 2 is first connected to the bow of the beam transport ship 1, and the bow of the beam transport ship 1 is rotated by towing to achieve a transverse ship.

[0041] Step S3: The cable of the winch at the bow of the beam transport ship 1 is connected to the pier column on the corresponding side. Then, according to the monitored position data of the steel box girder, the position of the bow of the beam transport ship 1 is adjusted by towing the tugboat 2 and taking in and paying out the cable of the winch. When adjusted to the designed position, the bow of the beam transport ship 1 drops an anchor for positioning.

[0042] In Step S3, two tugboats 2 are used and are respectively connected to the upstream and downstream sides of the bow of the beam transport ship 1 for push-pull towing.

[0043] Step S4: The anchor for initial positioning of the stern is retrieved. Then, according to the monitored position data of the steel box girder, the position of the stern of the beam transport ship 1 is adjusted by towing the tugboat 2 and taking in and paying out the cable of the winch. When adjusted to the situation where the center line of the beam transport ship 1 is aligned with the center line of the bridge within the designed error range, the stern of the beam transport ship 1 drops an anchor for positioning.

[0044] In Steps S3 and S4, the bow and stern of the beam transport ship 1 both use "eight"-shaped anchors for positioning. The tugboat 2 has a horsepower of 3000 to 4000. The cables of the winches at the bow and stern of the beam transport ship 1 are connected to the steel cofferdam of the pier column on the corresponding side. When adjusted to the situation where the vertical projection distance between the bow and stern endpoints of the beam transport ship located on the center line of the beam transport ship and the center line of the bridge is within 1 m, the bow and stern of the beam transport ship 1 then drop anchors for positioning.

[0045] In Step S4, two tugboats 2 are used and are respectively connected to the upstream and downstream sides of the stern of the beam transport ship 1 for push-pull towing.

[0046] The Beidou / GPS dual-mode positioning instruments are evenly distributed along the center line position of the steel box girder, and the total stations are correspondingly set up on the access roads on both banks.

[0047] Step S5: The tugboat 2 sails to the side of the beam transport ship 1 located in the water turbulence area and tows for hull stability. At the same time, according to the monitored position data of the steel box girder, the anchor chain of the ship anchor and the cable of the winch are taken in and paid out to adjust the position of the beam transport ship 1, so that the longitudinal and transverse position errors of the steel box girder are controlled within the centimeter range. Then, the lifting ropes of the steel box girder deck crane a installed on the bridge deck are lowered and connected to the lifting points at both ends of the steel box girder. After adjusting the processes and loads of each lifting point, the steel box girder is lifted.

[0048] In Step S5, two tugboats 2 are used and are respectively connected to the upstream and downstream sides of the beam transport ship 1 for push-pull towing.

[0049] In step S5, the steel box girder deck crane a includes at least three groups of first diamond truss components a1 arranged in parallel. The first diamond truss components a1 are connected by a connecting component a2. At the front end above the first diamond truss component a1, there is a front upper cross beam a3. The front upper cross beam a3 has a box section with a height of 700 mm, a width of 500 mm, a top and bottom plate thickness δ = 16 mm, a web thickness δ = 12 mm, and the material is Q345B.

[0050] On the front upper cross beam a3, there is a hoist a4 for hoisting the bridge. The number of hoists a4 is five. Two are arranged at the front and back on both sides of the front upper cross beam a3, and one is arranged in the middle. The hoist a4 uses a 200t hydraulic continuous jack, and the jack uses 15×7 - φs15.2 steel strands to hoist the steel box girder. The second diamond truss component a5, the first diamond truss component a1, and the front upper cross beam a3 are provided with channels for the steel strands to connect the steel box girder.

[0051] Horizontally arranged below the front upper cross beam a3 is a horizontal connecting rod for connecting the first diamond truss components a1. The first diamond truss components a1 are connected by the horizontal connecting rod to ensure the overall strength of the structure. There is a connecting rod a9 arranged at intervals between the horizontal connecting rod and the bracing a7 in the middle of the upper horizontal rod a11. The connecting rod a9 is arranged between the horizontal connecting rod and the bracing a7 in the middle of the upper horizontal rod a11 to improve the overall stability and strength.

[0052] The steel box girder deck crane also includes a group of second diamond truss components a5 arranged in parallel on the left side of the leftmost first diamond truss component a1 and a group of second diamond truss components a5 arranged in parallel on the right side of the rightmost first diamond truss component a1. The second diamond truss component a5 is connected to the adjacent first diamond truss component a1 by a cross brace a6. At least three groups of bracings a7 for increasing the overall strength are added horizontally between the first diamond truss components a1. The bracings a7 are respectively arranged in the middle of the upper horizontal rod a11, the middle of the lower horizontal rod a12, and the end of the vertical rod a15. Both ends of the bracing a7 are connected to the first diamond truss components a1 on the left and right sides. The second diamond truss component a5 is provided with a cross brace a6 at the connection of the upper chord a16 and the lower chord a17 corresponding to the first diamond truss component a1, the bracing a7, and the connecting component a2.

[0053] A front upper cross beam a3 is added to the second diamond truss component a5. The two front upper cross beams a3 are arranged in parallel, and a cushion beam a8 for installing the hoist a4 is provided above. By adding the cushion beam a8 for installing the hoist a4 and a front upper cross beam a3, the stress of the cross beam can be dispersed to ensure the overall stress of the hoisting equipment.

[0054] The second diamond truss assembly a5 has the same shape and dimensions as the first diamond truss assembly a1. Both the second diamond truss assembly a5 and the first diamond truss assembly a1 include an upper horizontal bar a11, a lower horizontal bar a12, a front diagonal bar a13, a rear diagonal bar a14, and a vertical bar a15. Each member is pinned together using a 45# steel pin with a diameter of 169 mm. The upper horizontal bar a11, the lower horizontal bar a12, the front diagonal bar a13, and the rear diagonal bar a14 are connected to form a diamond shape, and the vertical bar a15 is connected at the diagonal corners of the diamond. Each member of the second diamond truss assembly a5 and the first diamond truss assembly a1 is connected using a φ169 mm pin, made of 45# steel. The front end of the lower horizontal bar a12 is connected to the bridge top surface through a temporary strengthening backing plate a10.

[0055] The connection assembly a2 includes an upper chord bar a16 and a lower chord bar a17 arranged in parallel. The upper chord bar a16 is arranged at the connection between the top end of the vertical bar a15 and the end of the upper horizontal bar a11, and the lower chord bar a17 is arranged in the middle of the vertical bar a15. Between the upper chord bar a16 and the lower chord bar a17, there are vertically arranged vertical web members a18 and inclined web members a19 arranged at intervals. The upper chord bar a16 and the lower chord bar a17 are made of 220×220×10 mm square steel, and the vertical web members a18 and the inclined web members a19 are made of 150×150×6 mm square steel, with the material being Q345B. The connection assembly a2 is bolted to the first diamond truss assembly a1. The connections between the connection assembly a2 and the first diamond truss assembly a1, as well as between the cross brace a6 and the second diamond truss assembly a5, are all made using 10.9 grade M24×80 bolts.

[0056] In this embodiment, for the fixed base of the steel box girder deck crane (the fixed base is a prior art and will not be elaborated here), due to the addition of the second diamond truss assembly a5, corresponding improvements and adjustments are also made. The fixed base includes a base plate and flange plates. The rear end of the base plate is fixed by a rear anchor, and the rear anchor includes an added rear anchor pier for fixing the rear anchor, rear anchor high-strength steel bars, and rear anchor backing plates. High-strength steel bars with a size of φ36 mm (PSB1080) are added at the rear end of the second diamond truss assembly a5. The number of rear anchor high-strength steel bars increases from the original three groups to five groups, and the size of the rear anchor backing plate is adjusted from 200*150*170 mm to 1500*500*30 mm, thereby ensuring the stability of the lifting equipment.

[0057] Corresponding adjustments are made to the fixed structure under the flange plate. The fixed structure includes longitudinal main bars, transverse main bars, and stirrups. Among them, the diameters of the longitudinal main bars and the transverse main bars are increased from 16 mm to 25 mm, the spacing between adjacent stirrups is adjusted to 15 cm, and steel plates are added on the bridge top surface at the front support point of the flange plate, and the space between the steel plates and the bridge top surface is filled densely with grouting material to ensure the force at the front support point.

[0058] By adding a second diamond truss assembly a5, the overall stability of the hoisting equipment is improved. A front upper crossbeam a3 is added to the second diamond truss assembly a5, and a cushion beam a8 is arranged on the two front upper crossbeams a3 for installing a hoist a4, which improves the strength and stiffness of the equipment, enables the overall lifting of the steel box girder, thereby reducing the frequency of high-altitude operations, lowering safety risks, and making the lifting process more efficient, reducing the construction period; the hoist a4 can accurately control the hoisting force and speed to ensure the smooth placement of the steel box girder.

Claims

1. A multi-dimensional intelligent auxiliary positioning and overall lifting construction method for a large-span and wide steel box girder, characterized in that: The following steps are involved: Step S1, the beam transport ship (1) transporting the steel box beam travels to the stern and stops at the corresponding bridge pier side, then connects the cable of the winch at the stern of the beam transport ship (1) to the corresponding side pier column, and drops anchor to perform initial stern positioning; Step S2: Setting up a Beidou / GPS dual-mode positioning device and a total station capable of establishing three-dimensional coordinate monitoring to monitor the position of the steel box girder in real time, the tugboat (2) first connects with the bow of the beam transport ship (1), and tows the bow of the beam transport ship (1) to rotate and realize the horizontal ship; Step S3, connecting the cable of the winch at the bow of the beam transport ship (1) to the corresponding side pier column, and then adjusting the bow position of the beam transport ship (1) by towing the tugboat (2) and retracting and releasing the winch cable according to the monitoring position data of the steel box girder. When adjusted to the designed position, the bow of the beam transport ship (1) is anchored and positioned; Step S4, retract the anchor used for initial positioning at the stern, and then adjust the stern position of the beam transport ship (1) by towing the tugboat (2) and retracting and releasing the winch cable according to the monitoring position data of the steel box girder. When the center line of the beam transport ship (1) is adjusted to be aligned with the center line of the bridge within the design error range, the beam transport ship (1) is anchored at the stern for positioning; Step S5, the tugboat (2) drives to the side of the beam transport ship (1) located in the turbulent water area to tow the ship to stabilize the hull, and at the same time, according to the monitoring position data of the steel box girder, the anchor chain and the winch cable are retracted and released to adjust the position of the beam transport ship (1), so that the longitudinal and transverse position errors of the steel box girder are controlled within the centimeter level, and then the corresponding steel box girder bridge crane (a) installed on the bridge deck lowers the lifting rope to connect with the lifting points at both ends of the steel box girder, and the lifting is carried out after adjusting the progress and load of each lifting point.

2. According to claim 1, a large-span and wide steel box girder multi-dimensional intelligent auxiliary positioning and overall lifting construction method is characterized by: In the step S3, two tugboats (2) are used and are respectively located on the upper and lower sides of the bow of the beam transporting ship (1) to connect and push and pull.

3. According to claim 1, a large-span and wide steel box girder multi-dimensional intelligent auxiliary positioning and overall lifting construction method is characterized by: In the step S4, two tugboats (2) are used and are respectively located at the upstream and downstream sides of the stern of the beam transporting vessel (1) to connect and push, pull and tug.

4. The method for multi-dimensional intelligent auxiliary positioning and overall lifting of a large-span wide steel box girder according to claim 1 is characterized in that: In the step S5, two tugboats (2) are used and are respectively located on the upper and lower sides of the hull of the beam transporting vessel (1) to connect, push, pull and tug.

5. The method for multi-dimensional intelligent auxiliary positioning and overall lifting of a large-span wide steel box girder according to claim 1 is characterized in that: In step S2, Beidou / GPS dual-mode positioning instruments are evenly distributed along the center line of the steel box girder, and the total stations are built on the sidewalks on both sides corresponding to each other.

6. The method for multi-dimensional intelligent auxiliary positioning and overall lifting of a large-span wide steel box girder according to claim 1 is characterized in that: In the steps S3 and S4, the bow and stern of the beam transport ship (1) both use "eight" anchors for anchoring and positioning, the tugboat (2) uses 3000 horsepower to 4000 horsepower, and the cables of the winches at the bow and stern of the beam transport ship (1) are connected to the corresponding side pier steel cofferdam; when the vertical projection distance between the bow end point of the stern of the beam transport ship (1) located on the center line of the beam transport ship (1) and the same plane as the center line of the bridge is adjusted to be within 1m, the bow and stern of the beam transport ship (1) are anchored and positioned.

7. The method for multi-dimensional intelligent auxiliary positioning and overall lifting of a large-span wide steel box girder according to claim 1 is characterized in that: In the step S5, the steel box girder bridge crane (a) includes at least three groups of first rhombus truss assemblies (a1) arranged in parallel, the first rhombus truss assemblies (a1) are connected by connecting assemblies (a2), a front upper cross beam (a3) ​​is arranged at the front end above the first rhombus truss assembly (a1), a hoist (a4) for hoisting the bridge is arranged on the front upper cross beam (a3), a transverse connecting rod for connecting the first rhombus truss assembly (a1) is arranged transversely below the front upper cross beam (a3), and the steel box girder bridge crane (a) also includes a first rhombus truss assembly (a1) arranged in parallel on the left side A group of second diamond truss components (a5) on the left side and a group of second diamond truss components (a5) arranged in parallel on the right side of the first diamond truss component (a1) on the right side, the second diamond truss components (a5) are connected to the adjacent first diamond truss components (a1) through a cross brace (a6), at least three groups of parallel links (a7) are added laterally between the first diamond truss components (a1) to increase the overall strength, a front upper cross beam (a3) ​​is added to the second diamond truss component (a5), the two front upper cross beams (a3) ​​are arranged in parallel, and a cushion beam (a8) for installing a crane (a4) is arranged on the top.

8. The method for multi-dimensional intelligent auxiliary positioning and overall lifting of a large-span wide steel box girder according to claim 7 is characterized in that: The second diamond truss assembly (a5) has the same shape and size as the first diamond truss assembly (a1). The second diamond truss assembly (a5) and the first diamond truss assembly (a1) both include an upper horizontal rod (a11), a lower horizontal rod (a12), a front diagonal rod (a13), a rear diagonal rod (a14), and a vertical rod (a15). Each rod is connected by a 169 mm diameter 45# steel pin. The upper horizontal rod (a11), the lower horizontal rod (a12), the front diagonal rod (a13), and the rear diagonal rod (a14) are connected in a diamond shape, and the vertical rod (a15) is connected at the diagonal of the diamond.

9. The method for multi-dimensional intelligent auxiliary positioning and overall lifting of a large-span wide steel box girder according to claim 8 is characterized in that: The connecting assembly (a2) comprises an upper chord (a16) and a lower chord (a17) arranged in parallel, wherein the upper chord (a16) is arranged at the connection between the top end of the vertical rod (a15) and the end of the upper horizontal rod (a11), and the lower chord (a17) is arranged in the middle of the vertical rod (a15), and a vertical web member (a18) and an inclined diagonal web member (a19) are arranged between the upper chord (a16) and the lower chord (a17) at intervals, and the upper chord (a16) and the lower chord (a17) adopt 2 20×220×10mm square steel, the vertical web members and the diagonal web members are made of 150×150×6mm square steel, the material is Q345B, the connecting component (a2) and the first rhombus truss component (a1) are bolted together; the parallel joint (a7) is respectively arranged in the middle of the upper horizontal bar, the middle of the lower horizontal bar, and the end of the vertical bar; the second rhombus truss component (a5) is provided with a cross brace (a6) corresponding to the connection between the first rhombus truss component (a1) and the parallel joint (a7) and the upper chord and lower chord of the connecting component (a2).

10. The method for multi-dimensional intelligent auxiliary positioning and overall lifting of a large-span wide steel box girder according to claim 9, characterized in that: There are five hoisting machines (a4), two of which are arranged on both sides of the front upper cross beam (a3) ​​and one in the middle. The hoisting machine (a4) adopts a 200t hydraulic continuous jack, and the jack adopts 15×7-φs15.2 steel strands to hoist the steel box beam. The second diamond truss assembly (a5), the first diamond truss assembly (a1) and the front upper cross beam (a3) ​​are provided with channels for connecting the steel box beams with the steel strands; a connecting rod (a9) is arranged between the transverse connecting rod and the flat joint (a7) arranged in the middle of the upper horizontal rod.

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