Arch rib double-ship transportation fixing device

Abstract

The utility model relates to an arch rib double-ship transportation fixing device which comprises a bottom plate, a side plate perpendicular to the bottom plate is fixedly arranged at one end of the bottom plate, two sets of lower buckling cables are arranged on the bottom plate, each set of lower buckling cables is provided with at least one lower buckling cable, one end of each lower buckling cable is anchored with the bottom plate, two sets of upper buckling cables are arranged on the side plate, and each set of upper buckling cables is provided with at least one lower buckling cable. One end of each upper buckle cable is anchored with the side plate; the distance between the two sets of lower buckling cables on the bottom plate and the distance between the two sets of upper buckling cables on the side plates are both larger than the width of the arch rib. When in use, the bottom plate is welded on a ship, the arch feet of the arch rib are supported at the junction of the bottom plate and the side plates, the upper buckle cable and the lower buckle cable are respectively connected with the top and the bottom of the arch rib, and the arch rib is fixed in a mode of combining rigid support and flexible constraint, so that the stability of the arch rib can be ensured; and adverse effects on the arch rib structure caused by asynchronous swaying of the two ships can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge construction technical field relates to a kind of arch rib's transport construction of arch bridge, specifically related to a kind of arch rib double-ship transport fixing device. BACKGROUND

[0002] When the construction of river-crossing arch bridge, in the case that the river has navigation condition, the arch rib is often assembled on the bank and floated to the bridge site for installation. Since the arch rib has large span, the arch rib can be transported by double ships. The two ends of the arch rib are fixed on two transport ships respectively, and the two ships are driven in coordination to transport the arch rib. Usually, the arch foot of the arch rib is rigidly fixed on the support platform of the ship by welding or bolt connection. However, during the transportation of the arch rib, the ship will sway in different directions, such as longitudinal, transverse and vertical directions, due to the influence of waves. Moreover, the sway of the two ships is not synchronized, and the rigid fixing of the arch rib and the ship can easily cause the arch rib to be twisted and deformed. SUMMARY

[0003] The utility model aims at the above problems, provides a kind of fixing device specially used for arch rib double-ship transport, can offset the destructive influence of sway on the arch rib structure during the arch rib transportation by double ships, ensures the safety of arch rib transportation.

[0004] The technical scheme of the utility model is as follows:

[0005] An arch rib double-ship transport fixing device is characterized by comprising a bottom plate, a side plate perpendicular to the bottom plate is fixedly arranged at one end of the bottom plate, two groups of at least one lower cable are arranged on the bottom plate, one end of each lower cable is anchored to the bottom plate, two groups of at least one upper cable are arranged on the side plate, one end of each upper cable is anchored to the side plate, and the spacing between the two groups of lower cables on the bottom plate and the spacing between the two groups of upper cables on the side plate are both greater than the width of the arch rib.

[0006] The utility model has simple structure, and the arch rib is fixed by combining rigid support and flexible constraint. The flexible constraint allows the relative spatial position between the arch rib and the fixing device to change to a certain extent under the action of external force, and the arch rib can restore to the original state after the external force is eliminated. The arch rib can be kept stable, and the deformation caused by secondary stress can be offset, so that the adverse effects of the unsynchronized sway of the two ships on the arch rib structure, such as twisting and bending, can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a structural schematic diagram of the utility model;

[0008] Figure 2 is a side view of the utility model in use state;

[0009] Figure 3 is a side view of the utility model connected with the arch rib;

[0010] Figure 4 Figure 1 is a perspective view of the utility model connecting with arch rib. DETAILED DESCRIPTION

[0011] As Figure 1 shown, the utility model includes a bottom plate 1, one end of the bottom plate is fixedly provided with a side plate 2 perpendicular to the bottom plate, two groups of at least one lower buckle cable 3 are arranged on the bottom plate, one end of each lower buckle cable 3 is anchored to the bottom plate 1, two groups of at least one upper buckle cable 4 are arranged on the side plate, one end of each upper buckle cable 4 is anchored to the side plate 2; the spacing of the two groups of lower buckle cables on the bottom plate and the spacing of the two groups of upper buckle cables on the side plate are both greater than the width of the arch rib.

[0012] In the specific implementation of the utility model, in order to ensure the connection strength between the bottom plate and the side plate, stiffening plates 5 can be welded between the two sides of the bottom plate 1 and the two sides of the side plate 2.

[0013] In the specific implementation of the utility model, in order to reduce the overall weight of the device, ensure the self-strength of the bottom plate and the side plate, and facilitate the installation and anchoring of the lower buckle cable and the upper buckle cable to the bottom plate and the side plate, the bottom plate 1 and the side plate 2 can respectively adopt two layers of steel plates, and a plurality of support plates 6 are equidistantly welded between the two layers of steel plates.

[0014] As Figure 2 , Figure 3 , Figure 4 As shown in the figure, when the arch rib is transported, one fixing device of the utility model is arranged on each of the two arch-transporting ships 7, and the bottom plate of the fixing device is welded to the deck of the ship; the two ends of the arch rib 8 are respectively placed on the two fixing devices, the arch foot of the arch rib is supported at the junction of the bottom plate 1 and the side plate 2, the two groups of lower buckle cables 3 are respectively connected to the two sides of the bottom of the arch rib 8, the two groups of upper buckle cables 4 are respectively connected to the two sides of the top of the arch rib 8, and the arch rib is fixed. A certain pre-tension is respectively applied to the lower buckle cable and the upper buckle cable, and the size of the pre-tension is taken as the standard that does not affect the deformation of the arch rib structure, and is obtained through stress calculation.

[0015] The above structure, the bottom plate 1 and the side plate 2 respectively form rigid compression constraints to the arch foot of the arch rib 8, the lower buckle cable 3 and the upper buckle cable 4 form tensile flexible constraints to the arch rib 8, the flexible constraints can allow the relative position between the arch rib and the fixing device to change to a certain extent under the action of external force, and the original position can be restored after the external force is eliminated, so as to offset the deformation of the arch rib caused by secondary stress.

[0016] Two ships cooperate to transport arch rib. During transportation, when the water surface is calm, the two ships have the same height, the arch rib is in the state of superstatic, and the arch rib structure is stable; when the two ships oscillate forward and backward due to the influence of wave force, the heights of the two ships are different, and the arch foot will have a rotating trend from the vertical plane of the arch rib, and the rotating centers of the two ships are different, the high water level ship will rotate around the contact point between the arch rib and the bottom plate of the fixing device, at this time, the tension of the upper cable 4 will increase to prevent the rotation of the arch foot and ensure the stability of the arch rib, the low water level ship will rotate around the contact point between the arch rib and the side plate of the fixing device, at this time, the tension of the lower cable 3 will increase to prevent the rotation of the arch foot and ensure the stability of the arch rib; when the two ships oscillate left and right due to the influence of wave force, since the upper cable 4 and the lower cable 3 have an angle with the vertical plane of the arch rib 7 in space, they exert spatial constraint on the arch rib, which not only ensures the stability of the arch rib in the vertical plane, but also ensures the lateral stability of the arch rib.

Claims

1. An arch rib double boat transport fixture characterized by: The application relates to a bottom plate, one end of which is fixedly provided with a vertical side plate, two groups of at least one lower buckling cable are arranged on the bottom plate, one end of each lower buckling cable is anchored to the bottom plate, two groups of at least one upper buckling cable are arranged on the side plate, one end of each upper buckling cable is anchored to the side plate, the interval of the two groups of lower buckling cables on the bottom plate and the interval of the two groups of upper buckling cables on the side plate are greater than the width of the arch rib.

2. The arch rib double boat transport fixture according to claim 1, characterized in that: Stiffening plates are welded between the two sides of the bottom plate and the two sides of the side plate.

3. The arch rib double boat transport fixture of claim 1, wherein: The bottom plate and the side plate are respectively made of two layers of steel plates, and a plurality of supporting plates are equidistantly welded between the two layers of steel plates.

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