Beam body transfer method

Abstract

The application discloses a beam body transfer method, and relates to the technical field of bridge superstructure erection construction, which comprises the following steps: making a transport ship carrying a box girder travel to the interval between two groups of support platforms arranged at a hoisting position, a support mechanism being arranged between the box girder and the transport ship, and making the part of the support mechanism extending out of the two sides of the transport ship to be located above the support platforms; and lowering the transport ship to make the part of the support mechanism extending out of the two sides of the transport ship to fall on the support platforms. The box girder is placed on the support mechanism of the transport ship, and the two end parts of the support mechanism extend out of the two sides of the transport ship, so that the box girder can be placed on the support platforms through the support mechanism by changing the elevation of the transport ship on the water surface, the problem that the transport ship can only transport but cannot erect the girder is solved, and the problem that the girder-erecting integrated ship can erect the girder and transport but has high long-distance transportation cost is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge superstructure erection construction technology, in particular to a beam body transfer method. BACKGROUND

[0002] In the design of bridge superstructure, box section has good structural performance, so box girder is widely used in the superstructure of various modern bridges in China. In long-span bridges, box girder has good stability during construction and use, and can meet the requirements of modern construction methods such as cantilever construction and incremental launching construction.

[0003] Due to the large volume and heavy weight of the box girder, it is generally transported on water to the hoisting position, and the bridge deck crane on the installed steel box girder is used for vertical lifting. For other cases that cannot be vertically lifted, the steel box girder needs to be transferred from the beam storage position to the hoisting position by other methods.

[0004] At present, when a beam transport and erection integrated ship is used to construct a long-span bridge, the beam body is first transported to the construction wharf by a transport ship, but it cannot be directly fed into the beam, and needs to be unloaded and then transported to the hoisting position by building a platform from the wharf to the construction area; or the beam is directly transported from the precast yard wharf to the construction site by the beam transport and erection integrated ship (long transportation distance). The above construction methods will result in high construction cost and low construction efficiency. SUMMARY

[0005] In view of the defects in the prior art, the purpose of the present application is to provide a beam body transfer method to solve the problems of high transfer cost and low construction efficiency of box girder transfer from the beam storage position to the hoisting position in the prior art.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is:

[0007] A beam body transfer method is provided, which comprises the following steps:

[0008] The transport ship carrying the box girder is driven to travel between the two groups of support platforms arranged at intervals at the hoisting position, a support mechanism is arranged between the box girder and the transport ship, and the part of the support mechanism extending out of both sides of the transport ship is located above the support platform;

[0009] The transport ship is lowered to make the part of the support mechanism extending out of both sides of the transport ship fall onto the support platform.

[0010] In some optional embodiments, the bottom of the support mechanism is provided with a jacking device for abutting against the top of the support platform to adjust the height of the support mechanism relative to the support platform.

[0011] In some optional embodiments, the support mechanism is two flat beams arranged at intervals.

[0012] In some optional embodiments, the two flat beams are arranged at intervals on the transport ship, and the box girder is arranged in the length direction of the transport ship, and the two ends of the flat beam extend to the width direction of the transport ship.

[0013] In some optional embodiments, the two ends of each flat beam extend to the same length of the transport ship.

[0014] In some optional embodiments, the two groups of support platforms are arranged at intervals in the longitudinal direction of the bridge, and each group of support platforms comprises two sub-platforms arranged at intervals in the transverse direction of the bridge, and each sub-platform is arranged to expose a certain height above the water surface.

[0015] In some optional embodiments, the certain height of each sub-platform is less than the high position of the hull elevation of the transport ship and greater than the low position of the hull elevation of the transport ship.

[0016] In some optional embodiments, a plurality of fender piers are arranged on the outer sides of each sub-platform away from each other.

[0017] In some optional embodiments, the interval distance of the two groups of support platforms is greater than or equal to the sum of the hull width of the transport ship and twice the safety distance.

[0018] In some optional embodiments, after the transport ship is lowered to make the part of the support mechanism extending out of the two sides of the transport ship fall on the support platform, the transport and girder integrated ship drives to the hoisting position to complete the girder taking and drives away, the transport ship drives to below the support mechanism, the transport ship is raised to carry the support mechanism and drives away from the hoisting position.

[0019] Compared with the prior art, the advantages of the present application are that by placing the box girder on the support mechanism of the transport ship and making the two ends of the support mechanism extend out of the two sides of the transport ship, the box girder can be placed on the support platform through the support mechanism by changing the elevation of the transport ship above the water surface, thereby solving the problem that the transport ship can transport but cannot erect the girder, and the transport and girder integrated ship can erect the girder and transport, but the long-distance transportation cost is high. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1An operation schematic view of the beam body transfer method of the present application;

[0022] Figure 2 An structure schematic view of the sub-platform in the beam body transfer method of the present application.

[0023] In the figure: 1, sub-platform; 11, pile column; 12, pile top distribution beam; 13, platform main beam; 2, anti-collision pier; 3, shoulder beam; 4, box girder; 5, transport ship; 6, transport and erect beam integrated ship. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0025] The embodiments of the present application will be further described below in combination with the drawings.

[0026] The present application provides a beam body transfer method, which comprises the following steps:

[0027] S1: as shown, the transport ship 5 carrying the box girder 4 is driven to the interval between the two groups of support platforms at the hoisting position, the support mechanism between the box girder 4 and the transport ship 5 is provided, and the part of the support mechanism extending out of the both sides of the transport ship 5 is located above the support platform. Figure 1 It can be understood that when the box girder 4 is loaded on the transport ship 5 from the beam storage position, the support mechanism needs to be placed on the transport ship 5 first, and then the box girder 4 is placed on the support mechanism. At this time, the support mechanism needs to extend out of the both sides of the transport ship 5, so that when the transport ship 5 is transported to the hoisting position, the box girder 4 can be placed on the support platform by using the support mechanism.

[0028] It should be noted that the support platform needs to be erected at the hoisting position. In the present example, the hoisting position is located above the water body, and the box girder 4 is waterborne construction. Therefore, the support platform can be a pile column inserted into the water bottom or a support fixed at the hoisting position. The support platform needs to be erected according to the weight of the box girder 4 and the support mechanism to meet the bearing requirement. At the same time, the interval distance of the support platforms should be such that the transport ship 5 can pass through while reserving a certain installation distance to avoid collision between the transport ship 5 and the support platform.

[0029]

[0030] ​When the ship body level of the transport ship 5 is higher than the level of the top of the support platform, the bottom of the support mechanism placed on the transport ship 5 is higher than the top surface of the support platform, the transport ship 5 can enter between the two groups of support platforms to ensure that the part of the support mechanism extending out of the transport ship 5 is above the support platform, to prepare for the next step of beam falling, and meanwhile, the support mechanism does not interfere with the transport ship 5.

[0031] S2: Lower the transport ship 5 to make the part of the support mechanism extending out of the two sides of the transport ship 5 fall on the support platform.

[0032] Here, the height of the transport ship 5 exposed to the water, i.e. the level of the ship body, can be raised or lowered by changing the draft of the transport ship 5. When the transport ship 5 lowers the ship body level until the part of the support mechanism extending out of the two sides of the transport ship 5 falls on the support platform, the beam feeding step of transporting the box girder 4 to the hoisting position is completed, and when the transport ship 5 leaves, the hoisting device can be used to hoist the box girder 4 to complete the beam taking step.

[0033] In some optional embodiments, a jacking device is arranged at the bottom of the support mechanism to abut against the top of the support platform to adjust the height of the support mechanism relative to the support platform.

[0034] The purpose of such arrangement is that when the transport ship 5 drives to the hoisting position between the two groups of support platforms arranged at intervals, the jacking device can be used to abut against and raise the support mechanism and the box girder 4 on the support mechanism after the extending part of the support mechanism is above the support platform, so that the support mechanism and the box girder 4 are separated from the transport ship 5, and the beam feeding step is completed.

[0035] In this example, the jacking device and the transport ship 5 can be used in cooperation to make the box girder 4 fall on the support platform more stably and controllably by abutting against the support platform while lowering the ship body level of the transport ship 5, and the time for beam placing or taking is saved, and the work efficiency is improved.

[0036] Preferably, the jacking device is a numerical control hydraulic jack.

[0037] In this example, the support mechanism is two flat shoulder beams 3 arranged at intervals.

[0038] It can be understood that the flat shoulder beam 3 is a beam body with a set length, and the length of the flat shoulder beam 3 is set according to the ship width of the transport ship 5 and the interval distance between the two groups of support platforms. The flat shoulder beam 3 is used to support the box girder 4, which can reduce the self weight of the support mechanism on the premise of ensuring that the box girder 4 is stably supported, thereby reducing the dead weight of the transport ship 5.

[0039] Here, the numerical control hydraulic jack can be arranged at the bottom of the two ends of the two flat beam 3 extending out of the transport ship 5, and correspond to the position of the supporting platform, to assist the beam landing.

[0040] Preferably, the two flat beams 3 are arranged on the transport ship 5 with a spacing, and the box girder 4 is consistent with the length direction of the transport ship 5, and the two ends of the flat beam 3 extend to the width direction of the transport ship 5.

[0041] In order to further stabilize the box girder 4 supported by the two flat beams 3 and keep balance when the beam lands on the supporting platform, in this example, the two flat beams 3 are arranged vertically to the box girder 4, and preferably, the center line of the length direction of the box girder 4 coincides with the line connecting the midpoints of the two flat beams 3.

[0042] In some optional embodiments, the length of each of the above flat beams 3 extending out of the above transport ship 5 is the same.

[0043] The advantage of such arrangement is that when the transport ship 5 drives to the middle position between the two supporting platforms, the supporting mechanism can be extended out of the two sides of the transport ship 5 above the supporting platform, which is convenient for the transport ship 5 to find the beam landing position.

[0044] Of course, if the length of the flat beam 3 is long enough or the area of the supporting platform is large enough, the length of the flat beam 3 extending out of the transport ship 5 can not be limited.

[0045] In some optional embodiments, the two groups of above-mentioned supporting platforms are arranged with a spacing along the longitudinal bridge direction, and each of the above-mentioned supporting platforms includes two sub-platforms 1 arranged with a spacing along the transverse bridge direction, and each of the above-mentioned sub-platforms 1 is arranged to expose the water surface to a certain height.

[0046] Before the transport ship 5 performs the beam body transfer and feeding beam action, it is necessary to build a supporting platform at the hoisting position. In this example, four sub-platforms 1 are built outside the hoisting position, and the corresponding two sub-platforms 1 in the two groups are used to support one flat beam 3.

[0047] It can be understood that the transport ship 5 drives into the space between the two groups of supporting platforms along the longitudinal bridge direction until the hoisting position, and then the two ends of the two flat beams 3 are respectively located above the two corresponding sub-platforms 1 of the two groups, and then the ship body height of the transport ship 5 is adjusted to be lower than the height of the sub-platform 1 exposed to the water surface, so that the two flat beams 3 and the box girder 4 on the flat beam 3 are landed on the sub-platform 1.

[0048] It should be noted that the height of the sub-platform 1 exposed to the water surface is set according to the conventional set height of the transport ship 5.

[0049] In this example, the set height of each of the above-mentioned sub-platforms is less than the high position of the ship body height of the above-mentioned transport ship 5, and greater than the low position of the ship body height of the above-mentioned transport ship 5.

[0050] In this way, the "high-in and low-out" can be ensured when the transport ship 5 drives to the lifting position and feeds the beam, so as to smoothly pass the beam 3 and the box girder 4 to the sub-platform 1. Of course, the model of the transport ship 5 also needs to be selected according to the weight of the box girder 4, and the distance between the two groups of support platforms also needs to be set according to the ship width of the transport ship 5.

[0051] In some optional embodiments, the distance between the two groups of support platforms is greater than or equal to the sum of the ship width of the transport ship 5 and twice the safety distance.

[0052] For example, when the safety distance is 3m, the distance between the two groups of support platforms is the ship width of the transport ship 5 plus 6m. The purpose of this setting is to prevent the transport ship 5 from colliding with the support platform when driving between the two groups of support platforms. Of course, the safety distance can be set according to the actual construction and the water environment of the site, which is not limited here.

[0053] As shown in Figure 2 In some optional embodiments, each sub-platform 1 includes a plurality of pile columns 11 vertically inserted into the water bottom and exposed to the water surface at a set height. A pile top distribution beam 12 and a platform main beam 13 are arranged on the top of the pile column 11.

[0054] In this example, the pile columns 11 are arranged in a matrix, and there are 9 pile columns 11 in each column. Every three pile columns 11 in each column are connected by a pile top distribution beam 12. A plurality of platform main beams 13 are arranged on the top of the pile top distribution beam 12 and form a network structure with the pile top distribution beam 12, thereby stably supporting the beam 3.

[0055] In other embodiments, the number of pile columns 11 can be set according to the weight of the beam 3 and the box girder 4 to be supported, and the number and distance between the pile columns 11 can be determined according to the size of the beam 3, so that the top area and bearing capacity of the sub-platform 1 meet the requirements.

[0056] Preferably, a plurality of fender piers 2 are arranged on the outer sides of each sub-platform 1 away from each other.

[0057] It can be understood that, in order to further prevent the transport ship 5 from colliding when entering between the two groups of support mechanisms, a plurality of fender piers 2 are arranged on the outer sides of each sub-platform 1 away from each other. Of course, fender piers 2 can also be arranged around the outer side of each sub-platform 1.

[0058] In some optional embodiments, after the transport ship 5 is lowered and the support mechanism extending from both sides of the transport ship 5 falls onto the support platform, the transport and support beam integrated ship 6 drives to the lifting position to complete the beam taking, the transport ship 5 drives below the support mechanism, the transport ship 5 is raised to carry the support mechanism and drives away from the lifting position.

[0059] It can be understood that after the transport ship 5 places the bent girders 3 and the box girder 4 on the support mechanism, the top of the transport ship 5 is kept lower than the top surface of the support platform, and after the transport ship 5 meets the passing requirements, the transport ship 5 can drive away from the lifting position at a low position. At this time, the transport and support girder integrated ship 6 can be driven to the lifting position, and the box girder 4 is lifted and installed, after the construction is completed, the transport and support girder integrated ship 6 drives away from the lifting position, and the transport ship 5 drives to the lifting position again, and drives into the lower part of the support mechanism at a height lower than the support mechanism. At this time, the height of the ship body of the transport ship 5 is adjusted to be higher than the height of the support platform, so as to support the support mechanism, and drive away from the lifting position with the support mechanism, to complete the single transfer.

[0060] Taking the embodiment of the application as an example, the transport ship 5 drives into and drives away from between the two groups of support platforms, and the transport and support girder integrated ship 6 drives into or drives away from the lifting position between the two sub-platforms 1 in a group, so that the box girder 4 can be transported to the lifting position along the longitudinal bridge, and the transport and support girder integrated ship 6 drives in a direction perpendicular to the box girder 4 to facilitate lifting.

[0061] The transport ship 5 carries two bent girders 3 and a box girder 4, and drives into between the two groups of sub-platforms 1 at a ship body height higher than the height of the top of the sub-platform 1. When the bent girders 3 are placed on the sub-platform 1, the height of the ship body of the transport ship 5 is lowered to place the box girder 4 on the two groups of sub-platforms 1 through the two bent girders 3, and then the transport ship 5 drives out of the lifting position at a height lower than the height of the bottom of the sub-platform 1 and the bent girders 3. At this time, the transport and support girder integrated ship 6 drives into between the two sub-platforms 1 in a group to lift the box girder 4, after the lifting is completed, the transport and support girder integrated ship 6 drives away, and the transport ship 5 drives into the lifting position again at a height lower than the height of the bottom of the sub-platform 1 and the bent girders 3. When the transport ship 5 is located below the two bent girders 3, the height of the ship body is raised, so that the transport ship 5 supports and lifts the two bent girders 3 away from the sub-platform 1. When it is ensured that the bent girders 3 are stably placed on the transport ship 5 and separated from the sub-platform 1, and the driving requirements are met, the transport ship can be kept at a height higher than the height of the top of the sub-platform 1, and the bottom of the bent girders 3 on the ship body is also higher than the height of the top of the sub-platform 1, and drives away from the lifting position.

[0062] Therefore, the interval distance between the two sub-platforms 1 in the same group should be greater than the ship body width of the transport and support girder integrated ship 6, and considering the safety distance, the sum of the ship width of the transport and support girder integrated ship 6 and twice the safety distance is preferred.

[0063] Of course, other lifting devices can also be used to lift the box girder 4, and here, considering the water construction, the transport and support girder integrated ship is more convenient and easy to construct.

[0064] Compared with the box girder 4 transported to the hoisting position and hoisted by the integrated ship for transporting and erecting the girder from the storage position, the transportation distance of the integrated ship for transporting and erecting the girder is smaller in the embodiment of the application, so that the cost is saved.

[0065] The beam body transportation method of the application places the box girder on the supporting mechanism on the transportation ship, and then uses two spaced supporting platforms arranged at the hoisting position to cooperate with the hull of the transportation ship, adopts the mode of driving into the two supporting platforms at a high position and then lowering the girder to the supporting platforms at a low position, realizes the beam body transportation in the water environment, and improves the economy of construction. The two flat beam pads arranged between the box girder and the transportation ship not only can stably support the box girder, but also are convenient to material and easy to operate. Each group of supporting platforms is arranged as two spaced sub-platforms, the construction amount is small, and the cost is low. The sub-platforms can be erected at the hoisting position, improve the construction convenience, shorten the girder transportation distance of the integrated ship for transporting and erecting the girder, and save the time cost. The jacking device arranged at the bottom of the supporting mechanism cooperates with the transportation ship to lower and take the girder, which not only makes the lowering and taking of the girder more stable, but also has better controllability, saves the time of placing or taking the girder, and improves the work efficiency. The fender arranged around the sub-platform improves the safety of the transportation ship when driving into and driving out between the two groups of supporting mechanisms, and avoids the rubbing accident.

[0066] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower", etc. are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0068] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of transporting a girder body, characterized by, It comprises the following steps: The transport ship (5) carrying the box girder (4) is driven to the two groups of support platforms arranged at intervals at the hoisting position, the support mechanism between the box girder (4) and the transport ship (5) is arranged, and the part of the support mechanism extending out of both sides of the transport ship (5) is located above the support platforms; The transport ship (5) is lowered to make the part of the support mechanism extending out of both sides of the transport ship (5) fall on the support platforms; The bottom of the support mechanism is provided with a jacking device for abutting against the top of the support platform to adjust the height of the support mechanism relative to the support platform. By cooperating the jacking device with the transport ship (5), the box girder (4) can be more stable when falling on the support platform, the operation is better, the time for placing or taking the girder is saved, and the work efficiency is improved.

2. The girder body transfer method according to claim 1, wherein The support mechanism is two interval shoulder poles (3).

3. The girder body transfer method according to claim 2, wherein The two interval shoulder poles (3) are arranged on the transport ship (5) and the length direction of the box girder (4) and the transport ship (5) is consistent, and the two ends of the shoulder pole (3) extend to the width direction of the transport ship (5).

4. The girder body transfer method according to claim 3, wherein The length of each shoulder pole (3) extending out of both ends of the transport ship (5) is the same.

5. The girder body transfer method according to claim 1, wherein The two groups of support platforms are arranged along the longitudinal bridge direction at intervals, each group of support platforms comprises two interval sub-platforms (1) along the transverse bridge direction, and each sub-platform (1) is arranged to expose the water surface by a certain height.

6. The girder body transfer method according to claim 5, wherein The certain height of each sub-platform is less than the high position of the hull elevation of the transport ship (5) and greater than the low position of the hull elevation of the transport ship (5).

7. The girder body transfer method according to claim 5, wherein A plurality of fender piers (2) are arranged on the outer sides of each sub-platform (1) away from each other.

8. The girder body transfer method according to claim 1, wherein The interval distance of the two groups of support platforms is greater than or equal to the sum of the hull width of the transport ship (5) and twice the safety distance.

9. The girder body transfer method according to claim 1, wherein After the transport ship (5) is lowered to make the part of the support mechanism extending out of both sides of the transport ship (5) fall on the support platforms, the transport and girder lifting integrated ship (6) drives to the hoisting position to complete the girder taking and drives away, the transport ship (5) drives to below the support mechanism, the transport ship (5) is raised to carry the support mechanism and drives away from the hoisting position.

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