Steel box girder hoisting construction positioning device and steel box girder hoisting positioning construction method

Abstract

The invention relates to the technical field of bridge construction, in particular to a steel box girder hoisting construction positioning device and a steel box girder hoisting positioning construction method.The steel box girder hoisting construction positioning device comprises a supporting body, a supporting beam is arranged on the top of the supporting body, and a plurality of lifting supporting cylinders are arranged on the supporting beam; the adjusting device comprises a lifting mechanism and a transverse moving mechanism, and the transverse moving mechanism is provided with a first transverse moving end and a second transverse moving end; the positioning instrument comprises an RTK module, a power supply device and a box body, and the RTK module and the power supply device are both installed in the box body. The steel box girder hoisting and positioning construction method comprises the following steps: hoisting a steel box girder to fall on a lifting support cylinder of a support beam; measuring the deviation between the actual coordinate and the positioning coordinate of the steel box girder through a positioning instrument; the adjusting device is used for adjusting the whole steel box girder; welding and fixing the steel box girder; and dismounting the adjusting device and the positioning instrument. The positioning precision is high, manual adjustment is not needed, and the construction efficiency is high.

Description

Technical Field

[0001] This application relates to the technical field of bridge construction, and particularly relates to a steel box girder hoisting construction positioning device and a steel box girder hoisting positioning construction method. Background Art

[0002] In the construction of large-scale bridge projects, steel box girders are commonly used important structural components. There are problems in traditional steel box girder hoisting construction such as low positioning accuracy, great difficulty in controlling the hoisting process, and relatively high safety risks. In the prior art, hoisting positioning often relies on manual measurement and empirical judgment, which not only reduces construction efficiency but also increases the risk of errors. Traditional methods usually use conventional hoisting tools such as steel wires and clamps, and there are obvious deficiencies in precise positioning and stable control. Especially in the construction environment of complex terrains and long-span bridges, traditional hoisting methods are difficult to meet the strict requirements for positioning accuracy and construction safety. Summary of the Invention

[0003] This application aims to solve at least one of the above technical problems in the prior art to some extent. For this reason, the embodiments of this application provide a steel box girder hoisting construction positioning device and a steel box girder hoisting positioning construction method. The steel box girder is adjusted by an adjusting device, with high positioning accuracy and no need for manual adjustment, thus avoiding the safety risks of high-altitude manual measurement operations and improving construction efficiency.

[0004] A steel box girder hoisting construction positioning device includes:

[0005] A support body, on the top of which a support beam is arranged, and a plurality of lifting support cylinders are arranged on the support beam, and each of the lifting support cylinders is arranged at intervals along the length direction of the support beam;

[0006] An adjusting device, arranged at one end of the support body for supporting the steel box girder, the adjusting device includes a lifting mechanism and a transverse movement mechanism, the lifting mechanism is installed on the transverse movement mechanism, the lifting moving end of the lifting mechanism is used to support the steel box girder, the transverse movement mechanism has a first transverse movement end and a second transverse movement end, the first transverse movement end is used to drive the lifting mechanism to move along a first direction, the second transverse movement end is used to drive the lifting mechanism to move along a second direction, and the first direction is perpendicular to the second direction;

[0007] A positioning instrument, including an RTK module, a power supply device and a box body, the RTK module and the power supply device are both installed inside the box body, the RTK module is connected to the power supply device, and a magnetic element is arranged at the bottom of the box body, and the positioning instrument is used to adsorb on the steel box girder through the magnetic element.

[0008] In an optional or preferred embodiment, the support body includes at least four brackets supporting the four corners of the steel box girder.

[0009] In an alternative or preferred embodiment, the bracket includes a bottom plate and a frame. Connecting feet are provided at both the top and bottom of the frame. The frame is connected to the bottom plate through the connecting feet at the bottom, and the support beam is fixed by the connecting feet at the top of the frame.

[0010] In an alternative or preferred embodiment, at least two frames are provided, and the connecting feet between adjacent two frames are aligned and detachably connected.

[0011] In an alternative or preferred embodiment, two support beams are provided, and the two support beams are horizontally fixed at the tops of the respective brackets on the same side.

[0012] In an alternative or preferred embodiment, six brackets are provided, and three brackets are arranged side by side on each side to support the two ends of the steel box girder.

[0013] In an alternative or preferred embodiment, the frame includes main body columns, connecting cross columns and diagonal braces. Four main body columns are provided, and the four main body columns are parallel to each other and distributed in a rectangular shape. Adjacent two main body columns are connected by two parallel and spaced connecting cross columns, and the diagonal corners between the two parallel and spaced connecting cross columns are connected by the diagonal braces. The partial segments of the main body columns above and below the connecting cross columns are both the connecting feet.

[0014] In an alternative or preferred embodiment, a connecting plate is horizontally installed at the end of the main body column, and connecting holes are formed in the connecting plate.

[0015] In an optional or preferred embodiment, the adjusting device includes a power component, a lifting adjusting rod, a top support plate, a first telescopic rod, a second telescopic rod, a first rack guide rail, a second rack guide rail, a first transverse moving gear and a second transverse moving gear. The power component has a first power output shaft, a second power output shaft and a third power output shaft. The lifting adjusting rod is connected to the first power output shaft. The power component drives the lifting adjusting rod to lift through the first power output shaft. The top support plate is horizontally installed at the lifting movable end of the lifting adjusting rod. The first transverse moving gear is connected to the second power output shaft through the first telescopic rod. The first transverse moving gear meshes with the first rack guide rail. The power component drives the first transverse moving gear to move meshingly along the first rack guide rail through the second power output shaft. The second transverse moving gear is connected to the third power output shaft through the second telescopic rod. The second transverse moving gear meshes with the second rack guide rail. The power component drives the second transverse moving gear to move meshingly along the second rack guide rail through the third power output shaft. Both the first rack guide rail and the second rack guide rail are fixedly connected to the bracket. The first transverse moving gear is provided with a first clamping plate for clamping on the outer side edge of the first rack guide rail. The second transverse moving gear is provided with a second clamping plate for clamping on the outer side edge of the second rack guide rail.

[0016] A construction method for hoisting and positioning a steel box girder uses the steel box girder hoisting construction positioning device described in any one of the above to perform positioning construction, including the following steps:

[0017] Hoist the steel box girder and place it on the lifting support cylinder of the support beam;

[0018] Measure the deviation between the actual coordinates and the positioning coordinates of the steel box girder through a positioning instrument;

[0019] According to the deviation measured by the positioning instrument, the adjusting device adjusts the entire steel box girder in the lifting direction, the first direction and the second direction;

[0020] After the steel box girder is adjusted in place, adjust the levelness of the steel box girder through the lifting support cylinder;

[0021] After the levelness of the steel box girder is adjusted in place, temporarily fix the steel box girder;

[0022] Weld and fix the steel box girder;

[0023] Remove the adjusting device and the positioning instrument.

[0024] Based on the above technical solutions, the embodiments of the present application at least have the following beneficial effects: During the construction process, after the steel box girder is hoisted onto the lifting support cylinder, first start the lifting mechanism of the adjusting device to jack up the steel box girder. Subsequently, according to the coordinate deviation value feedback by the positioning instrument, perform a composite movement through the second transverse end of the first transverse end of the transverse movement device to adjust the steel box girder in the horizontal direction. When the steel box girder reaches the designed position, the lifting mechanism of the adjusting device descends, so that the steel box girder lands on the lifting support cylinder. Then, adjust the levelness of the steel box girder through the lifting support cylinder. After the levelness meets the standard, weld the steel box girder. Compared with the traditional hoisting process, the RTK module of the present application obtains millimeter-level positioning data through a multi-band satellite signal receiver. During construction, the operator synchronously receives the coordinate data of the positioning instrument through a wireless terminal, generates a three-dimensional model of the spatial attitude of the steel box girder in real time, and automatically compares it with the designed coordinates. The present application adjusts the steel box girder through the adjusting device, with high positioning accuracy and no need for manual adjustment, thus avoiding the safety risks of high-altitude manual measurement operations and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following further describes the present application in conjunction with the drawings and embodiments;

[0026] Figure 1 is a schematic structural diagram of a steel box girder hoisting construction positioning device provided by an embodiment of the present application;

[0027] Figure 2 is Figure 1 a schematic structural diagram of the bracket in the shown embodiment;

[0028] Figure 3 is Figure 1 a schematic structural diagram of the frame in the shown embodiment;

[0029] Figure 4 is Figure 1 a schematic structural diagram of the adjusting device in the shown embodiment;

[0030] Figure 5 is Figure 1 a schematic structural diagram of the positioning instrument in the shown embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to enable those skilled in the art to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] The following further describes the implementation manners of the present application in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0033] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0035] In the embodiments of the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0036] In the construction of large bridge projects, steel box girders are commonly used important structural components. Traditional steel box girder hoisting construction has problems such as low positioning accuracy, difficult control during the hoisting process, and relatively high safety risks. In the prior art, hoisting positioning often relies on manual measurement and empirical judgment, which not only reduces construction efficiency but also increases the risk of errors. Traditional methods usually use conventional hoisting tools such as steel wires and clamps, and there are obvious deficiencies in precise positioning and stable control. Especially in complex terrain and large-span bridge construction environments, traditional hoisting methods are difficult to meet the strict requirements for positioning accuracy and construction safety.

[0037] Refer to Figures 1 to 5, this application provides a positioning device for hoisting steel box girders, which includes a support body 100, an adjusting device 200 and a positioning instrument 300.

[0038] A support beam 101 is arranged on the top of the support body 100, and a plurality of lifting support cylinders 102 are arranged on the support beam 101. Each lifting support cylinder 102 is arranged at intervals along the length direction of the support beam 101. During the hoisting construction process of the steel box girder 400, first, the support body 100 is arranged in the preset hoisting area of the steel box girder 400, and then the steel box girder 400 is hoisted on the top of the lifting support cylinder 102. Among them, the lifting support cylinders 102 arranged at intervals on the surface of the support beam 101 are hydraulic drive structures. After their top surfaces contact the bottom surface of the steel box girder 400, the levelness of the steel box girder 400 can be adjusted by independent lifting.

[0039] In some embodiments, the support body 100 includes at least four brackets 103 respectively supporting at the four corners of the steel box girder 400.

[0040] For hoisting large-tonnage steel box girders 400, for example, in the embodiments of this application, six brackets 103 can also be set, and three brackets 103 are arranged side by side on each side to support the steel box girder 400.

[0041] Such as Figure 2 、 Figure 3 、 Figure 4 , the bracket 103 includes a bottom plate 104 and a frame 105. Connecting feet 106 are arranged at both the top and bottom of the frame 105. The bottom plate 104 is fixed on the ground, and the frame 105 is connected and fixed to the bottom plate 104 through the connecting feet 106 at the bottom. The frame 105 fixes the support beam 101 through the connecting feet 106 at the top.

[0042] Referring to Figure 4 , the frame 105 includes main body columns 107, connecting cross columns 108 and diagonal braces 109. Four main body columns 107 are arranged, and the four main body columns 107 are parallel to each other and distributed in a rectangular shape. Adjacent two main body columns 107 are connected by two parallel and spaced connecting cross columns 108. The diagonal corners between the two parallel and spaced connecting cross columns 108 are connected by diagonal braces 109. The partial segments of the main body columns 107 above the connecting cross columns 108 and the partial segments below the connecting cross columns 108 are both connecting feet 106. The main body columns 107 and the connecting cross columns 108 jointly form the main structure of the frame 105. The setting of the diagonal braces 109 can effectively improve the structural strength of the frame 105.

[0043] In order to increase the support height of the support body 100, in some embodiments, at least two frames 105 are provided, and the connecting feet 106 between adjacent two frames 105 are aligned and detachably connected.

[0044] The end of the connecting foot 106 is horizontally installed with a connecting plate 110, and connecting holes are formed on the connecting plate 110. Adjacent two frames 105 are sequentially connected through the connecting plate 110. The height of the support 103 can be adjusted by increasing or decreasing the frames 105.

[0045] Two support beams 101 are provided, and the two support beams 101 are horizontally fixed on the connecting feet 106 at the tops of the respective supports 103 on the same side, and the two support beams 101 are parallel to each other.

[0046] The adjusting device 200 is arranged at one end of the support body 100 for supporting the steel box girder 400. The adjusting device 200 includes a lifting mechanism and a transverse movement mechanism. The lifting mechanism is installed on the transverse movement mechanism. The lifting moving end of the lifting mechanism is used to support the steel box girder 400. The transverse movement mechanism has a first transverse movement end and a second transverse movement end. The first transverse movement end is used to drive the lifting mechanism to move along the first direction, and the second transverse movement end is used to drive the lifting mechanism to move along the second direction. The first direction is perpendicular to the second direction.

[0047] Specifically, referring to Figure 4 ,the adjusting device 200 includes a power component 201, a lifting adjusting rod 202, a supporting plate 203, a first telescopic rod 204, a second telescopic rod 205, a first rack guide rail 206, a second rack guide rail 207, a first transverse movement gear 208 and a second transverse movement gear 209. The power component 201 has a first power output shaft, a second power output shaft and a third power output shaft. The lifting adjusting rod 202 is connected to the first power output shaft. The power component 201 drives the lifting adjusting rod 202 to lift through the first power output shaft. The supporting plate 203 is horizontally installed at the lifting moving end of the lifting adjusting rod 202. The first transverse movement gear 208 is connected to the second power output shaft through the first telescopic rod 204. The first transverse movement gear 208 meshes with the first rack guide rail 206. The power component 201 drives the first transverse movement gear 208 to move meshingly along the first rack guide rail 206 through the second power output shaft. The second transverse movement gear 209 is connected to the third power output shaft through the second telescopic rod 205. The second transverse movement gear 209 meshes with the second rack guide rail 207. The power component 201 drives the second transverse movement gear 209 to move meshingly along the second rack guide rail 207 through the third power output shaft. Both the first rack guide rail 206 and the second rack guide rail 207 are fixedly connected to the support 103. A first clamping plate 211 for clamping on the outer side edge of the first rack guide rail 206 is provided on the first transverse movement gear 208. A second clamping plate 212 for clamping on the outer side edge of the second rack guide rail 207 is provided on the second transverse movement gear 209.

[0048] Two first rack guides 206 are oppositely arranged on the top frame 105. The first rack guides 206 are fixedly welded to the connecting cross columns 108 and the main body columns 107 of the top frame 105. Two second rack guides 207 are oppositely arranged on the top frame 105. The second rack guides 207 are fixedly welded to the connecting cross columns 108 and the main body columns 107 of the top frame 105.

[0049] The first power output shaft drives the lifting adjustment rod 202 to move vertically. After the top support plate 203 at the top of the lifting adjustment rod 202 contacts the steel box girder 400, it can lift the steel box girder 400.

[0050] In addition, four telescopic diagonal struts 210 are arranged between the top support plate 203 and the power component 201. The four telescopic diagonal struts 210 are circumferentially distributed around the lifting adjustment rod 202. One end of the telescopic diagonal strut 210 is hinged to the top support plate 203, and the other end is hinged to the power component 201.

[0051] The second power output shaft is coaxially fixed to the first telescopic rod 204. The rotation of the second power output shaft drives the first telescopic rod 204 and the first transverse movement gear 208 to move along the first rack guide 206. The third power output shaft is coaxially fixed to the second telescopic rod 205. The rotation of the third power output shaft drives the second transverse movement gear 209 and the second rack guide 207 to move along the second rack guide 207, realizing the two-way precise displacement of the steel box girder 400 in the horizontal plane along the first direction and the second direction. The first transverse movement end is the first transverse movement gear 208, and the second transverse movement end is the second transverse movement gear 209.

[0052] In addition, the first clamping plate 211 is stuck outside the first rack guide 206, and the second clamping plate 212 is stuck outside the second rack guide 207, forming a double anti-disconnection structure to ensure the mechanical stability during the adjustment process.

[0053] Specifically, the power component 201 is set as a combination of a hydraulic cylinder and two double-output shaft stepping motors. The piston rod of the hydraulic cylinder serves as the lifting adjustment rod 202. The first telescopic rods 204 are installed on both output shafts of one of the double-output shaft stepping motors. This double-output shaft stepping motor drives the two first telescopic rods 204 to rotate, and then the first transverse movement gear 208 on the first telescopic rod 204 moves horizontally along the first rack guide 206. The second telescopic rods 205 are installed on both output shafts of the other double-output shaft stepping motor. This double-output shaft stepping motor drives the two second telescopic rods 205 to rotate, and then the second transverse movement gear 209 on the second telescopic rod 205 moves horizontally along the second rack guide 207.

[0054] Refer to Figure 5In some embodiments, the positioning instrument 300 includes an RTK module 301, a power supply device 302 and a box body 303. The RTK module 301 and the power supply device 302 are both installed inside the box body 303. The RTK module 301 and the power supply device 302 are connected, and the positioning instrument 300 is adsorbed on the steel box girder 400 through the magnetic element 304.

[0055] The RTK module 301 is a real-time dynamic positioning technology based on carrier phase observation values, which can provide three-dimensional positioning results of the measuring station in a specified coordinate system in real time.

[0056] During the construction process, four positioning instruments 300 are set up, and the four positioning instruments 300 are adsorbed on the four corners of the top surface of the steel box girder through magnetic elements 304.

[0057] A high-strength permanent magnet is embedded at the bottom of the box body 303 of the positioning instrument 300, which can be quickly adsorbed on the four corner surfaces of the steel box girder 400. The RTK module 301 built into the box body 303 obtains millimeter-level positioning data through a multi-band satellite signal receiver, and the power supply device 302 uses a low-temperature resistant lithium battery pack. During construction, the operator synchronously receives the coordinate data of the four-corner positioning instrument 300 through a wireless terminal, generates a three-dimensional model of the spatial posture of the steel box girder 400 in real time, and automatically compares it with the design coordinates.

[0058] During the construction process, after the steel box girder 400 is hoisted to the lifting support cylinder 102, the lifting mechanism of the adjusting device 200 is first started to lift the steel box girder 400. Subsequently, according to the coordinate deviation value fed back by the positioning instrument 300, the first transverse end and the second transverse end of the transverse device perform a compound movement to adjust the steel box girder 400 in the horizontal direction. When the steel box girder 400 reaches the designed position, the lifting mechanism of the adjusting device 200 descends, so that the steel box girder 400 falls on the lifting support cylinder 102, and then the lifting support cylinder is used to adjust the horizontality of the steel box girder 400. When the horizontality meets the standard, preliminary positioning is achieved by welding a temporary fixing plate. At this time, the positioning instrument 300 continuously monitors the offset caused by welding thermal deformation until it is removed after all welding operations are completed. During construction, the operator synchronously receives the coordinate data of the positioning instrument 300 through the wireless terminal, generates a three-dimensional model of the spatial posture of the steel box girder 400 in real time, and automatically compares it with the design coordinates. Therefore, the positioning accuracy of the present application is high. The present application adjusts the steel box girder 400 through the adjustment device 200 without manual adjustment, thereby avoiding the safety risks of high-altitude manual measurement operations and improving construction efficiency.

[0059] This application adapts to different span requirements through modular brackets 103. When the construction site is a curved bridge, the length of the support beam 101 can be adjusted by increasing or decreasing the number of intermediate brackets 103. In complex terrains such as mountainous canyons, the design of the diagonal braces 109 of the support 100 can effectively resist lateral wind loads. The bracket 103 is composed of multiple frames 105, and the detachable connection structure between the frames 105 facilitates transportation and rapid assembly. Compared with the traditional hoisting process, this application shortens the positioning adjustment time, has high positioning accuracy, and avoids the safety risks of high-altitude manual measurement operations.

[0060] This application also provides a construction method for hoisting and positioning of steel box girders. Using the above-mentioned steel box girder hoisting construction positioning device for positioning construction, it includes the following steps:

[0061] Hoist the steel box girder 400 and place it on the lifting support cylinder 102 of the support beam 101;

[0062] Measure the deviation between the actual coordinates and the positioning coordinates of the steel box girder 400 through the positioning instrument 300;

[0063] According to the deviation measured by the positioning instrument 300, adjust the device 200 to adjust the entire steel box girder 400 in the lifting direction, the first direction, and the second direction;

[0064] After the steel box girder 400 is adjusted in place, the lifting support cylinder 102 adjusts the levelness of the steel box girder 400;

[0065] After the levelness of the steel box girder 400 is adjusted in place, temporarily fix the steel box girder 400;

[0066] Weld and fix the steel box girder 400;

[0067] Remove the adjusting device 200 and the positioning instrument 300.

[0068] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0069] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A steel box girder hoisting construction positioning device, characterized in that: include: A support body, wherein a support beam is arranged on the top of the support body, and a plurality of lifting support cylinders are arranged on the support beam, and each of the lifting support cylinders is arranged at intervals along the length direction of the support beam; An adjusting device is arranged at one end of the supporting body for supporting the steel box girder, the adjusting device comprises a lifting mechanism and a transverse mechanism, the lifting mechanism is installed on the transverse mechanism, the lifting movable end of the lifting mechanism is used to support the steel box girder, the transverse mechanism has a first transverse end and a second transverse end, the first transverse end is used to drive the lifting mechanism to move along a first direction, the second transverse end is used to drive the lifting mechanism to move along a second direction, the first direction is perpendicular to the second direction; The positioning instrument comprises an RTK module, a power supply device and a box body, wherein the RTK module and the power supply device are both installed inside the box body, the RTK module and the power supply device are connected, a magnetic element is arranged at the bottom of the box body, and the positioning instrument is used to be adsorbed on a steel box girder through the magnetic element.

2. The steel box girder hoisting construction positioning device according to claim 1 is characterized in that: The support body includes at least four brackets supported at four corners of the steel box beam.

3. The steel box girder hoisting construction positioning device according to claim 2 is characterized in that: The bracket includes a base plate and a frame, and connecting feet are provided at the top and bottom of the frame. The frame is connected to the base plate via the connecting feet at the bottom, and the frame fixes the support beam via the connecting feet at the top.

4. The steel box girder hoisting construction positioning device according to claim 3 is characterized in that: At least two frames are provided, and the connecting legs between two adjacent frames are aligned and detachably connected.

5. The steel box girder hoisting construction positioning device according to claim 2 is characterized in that: Two support beams are provided, and the two support beams are horizontally fixed on the top of each bracket on the same side.

6. The steel box girder hoisting construction positioning device according to claim 2 is characterized in that: Six brackets are provided, with three brackets distributed side by side on each side and supported at both ends of the steel box girder.

7. The steel box girder hoisting construction positioning device according to claim 3 is characterized by: The frame includes main columns, connecting cross columns and diagonal braces. Four main columns are arranged. The four main columns are parallel to each other and distributed in a rectangular shape. Two adjacent main columns are connected by two parallel and spaced connecting cross columns. The diagonals between the two parallel and spaced connecting cross columns are connected by the diagonal braces. The partial sections of the main columns located above the connecting cross columns and the partial sections located below the connecting cross columns are all connecting legs.

8. The steel box girder hoisting construction positioning device according to claim 7 is characterized in that: A connecting plate is horizontally installed at the end of the main column, and a connecting hole is provided on the connecting plate.

9. The steel box girder hoisting construction positioning device according to claim 2 is characterized in that: The adjusting device comprises a power component, a lifting adjustment rod, a top support plate, a first telescopic rod, a second telescopic rod, a first rack guide, a second rack guide, a first transverse gear and a second transverse gear, the power component comprises a first power output shaft, a second power output shaft and a third power output shaft, the lifting adjustment rod is connected to the first power output shaft, the power component drives the lifting adjustment rod to rise and fall through the first power output shaft, the top support plate is horizontally installed at the lifting movable end of the lifting adjustment rod, the first transverse gear is connected to the second power output shaft through the first telescopic rod, the first transverse gear is meshed with the first rack guide, the The power component drives the first transverse shift gear to mesh and move along the first rack guide through the second power output shaft, the second transverse shift gear is connected to the third power output shaft through the second telescopic rod, the second transverse shift gear is meshed with the second rack guide, the power component drives the second transverse shift gear to mesh and move along the second rack guide through the third power output shaft, the first rack guide and the second rack guide are both fixedly connected to the bracket, the first transverse shift gear is provided with a first clamping plate for clamping on the outer edge of the first rack guide, and the second transverse shift gear is provided with a second clamping plate for clamping on the outer edge of the second rack guide.

10. A method for hoisting and positioning a steel box girder, characterized in that: The positioning construction is performed using the steel box girder hoisting construction positioning device described in any one of claims 1 to 9, comprising the following steps: The hoisted steel box girder falls on the lifting support cylinder of the support beam; The deviation between the actual coordinates of the steel box girder and the positioning coordinates is measured by a positioning instrument; According to the deviation measured by the positioning instrument, the adjusting device adjusts the entire steel box girder in the lifting direction, the first direction and the second direction; When the steel box girder is adjusted into place, the horizontality of the steel box girder is adjusted by lifting the support tube; After the horizontality of the steel box girder is adjusted to the right level, the steel box girder is temporarily fixed; Welding and fixing of steel box beams; Remove the adjustment device and positioning instrument.

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