Hoisting and assembling method for fixed support of floating bridge

Abstract

The present invention discloses a method for hoisting and assembling the fixing bracket of a floating bridge, comprising the following steps: erecting a lifting frame on water; performing the operation of increasing the height of the pier column at the lower part of the floating pier through the lifting device and the displacement system on the lifting frame; installing a deck crane at the docking end of the main beam section of the already assembled floating bridge body; connecting the main beam section to be assembled with the upper pier column through the lifting device, the displacement system on the lifting frame and the deck crane; connecting the lower part of the floating pier with the upper pier column through the lifting device and the displacement system on the lifting frame; jointly adjusting the axis between the main beam section to be assembled and the main beam section of the already assembled floating bridge body through the lifting device, the displacement system on the lifting frame and the deck crane; welding and connecting between the main beam section to be assembled and the main beam section of the already assembled floating bridge body; and towing the assembled floating bridge body away from the lifting frame. The present invention solves the problems that the high pier column and the floating drum cannot be towed as a whole, and the assembly of the main beam of the floating bridge with a large longitudinal slope is difficult.

Description

Technical Field

[0001] The invention relates to a method for hoisting and assembling a fixed bracket of a floating bridge. Background Art

[0002] In the past 30 years, floating bridges have been applied to modern infrastructure construction. Their technology has developed rapidly and gradually matured, and can be used as an important part of modern infrastructure. However, compared with land bridges including cable-stayed bridges and suspension bridges, the current data on floating bridges is still very limited, especially the data on construction records, environmental conditions, durability, operation and performance of floating bridges. At present, the number of long floating bridges in the world is very limited, only about 20.

[0003] Most of the floating bridges built abroad are continuous pontoon structures. The square pontoons at the bottom of this type of floating bridge are connected end to end to form a continuous floating structure. The upper part of the pontoons can directly bear vehicle traffic loads, and piers or frame structures can also be set up to increase the bridge deck elevation.

[0004] In the existing construction process of floating bridges, a splicing structure is generally adopted. A floating bridge connector is set between the floating bridge units. The floating bridge connector connects the floating bridge units to each other to form an integral floating bridge structure. Since the two ends of the floating bridge need to be connected to the shore connection structure on the shore, the closer to the two ends of the floating bridge, the greater the longitudinal slope of the floating bridge, and the higher the piers on the pontoons, the general floating top-pushing installation process cannot complete the assembly of the main beam and the pontoon. At the same time, due to the poor towing stability of the high pier pontoon during floating, the piers and pontoons cannot be towed as a whole. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a method for hoisting and assembling a fixed support of a floating bridge, which not only solves the problem that high piers and pontoons cannot be towed as a whole, but also solves the problem that it is difficult to assemble the main beam of a floating bridge with a large longitudinal slope.

[0006] The object of the present invention is achieved as follows: a method for assembling a fixed support of a floating bridge, which is used to assemble multiple sections of floating bridge monomers into a floating bridge as a whole; each section of the floating bridge monomer includes a main beam segment and a floating pier connected to the bottom surface of the main beam segment, each floating pier includes a buoy and a pier column fixed between the top surface of the buoy and the bottom surface of the main beam segment, and the pier column is assembled by a section of lower half pier column and a section of upper half pier column; the assembly method includes the following steps:

[0007] Step 1: Set up a lifting frame on the water. The lifting frame is fixed to the bottom of the water by driving piles. The lifting frame is in a portal shape and is arranged transversely to the bridge. It includes two side frames, two cross beams spanning between the tops of the two side frames, a lifting platform movably installed between the two cross beams, a lifting device installed on the lifting platform, and a displacement system installed on the two cross beams between the lifting platform.

[0008] Step 2: Use a barge to tow the lower half of the pier column to the lower part of the lifting frame. Lift the lower half of the pier column by the lifting device on the lifting frame, and the barge withdraws from the working range of the lifting frame.

[0009] Step 3: Tow a floating buoy to the lower part of the lifting frame, and temporarily fix the floating buoy between the two side frames of the lifting frame by using steel wires.

[0010] Step 4: Slowly lower the lower half of the pier column by the lifting device on the lifting frame. When the lower half of the pier column approaches the floating buoy, adjust the docking accuracy between the lower half of the pier column and the floating buoy by adjusting the displacement system on the lifting frame, and then perform the welding and assembly between the lower half of the pier column and the floating buoy to form the lower part of the floating pier. Then, the lifting device releases the lifting point of the lower half of the pier column, and releases the steel wire ropes fixing the floating buoy, and tow the assembled lower part of the floating pier out of the working range of the lifting frame.

[0011] Step 5: First, use a barge to tow the assembled floating bridge body to its position and carry out anchor positioning. Then, install a bridge deck crane on the top surface of the docking end of the main beam section of the assembled floating bridge body.

[0012] Step 6: Tow the main beam section to be spliced into the working range of the lifting frame. The hooks of the lifting device on the lifting frame and the hooks of the bridge deck crane are respectively hooked to the lifting lugs on the two ends of the top surface of the main beam section to be assembled. The hooks of the lifting device and the bridge deck crane lift the main beam section to be assembled at the same time.

[0013] Step 7: First, tow the upper half of the pier column to its position, and then perform the welding connection between the upper half of the pier column and the pier head on the bottom surface of the main beam section to be spliced.

[0014] Step 8: First, tow the assembled lower part of the floating pier to its position, and temporarily fix the lower part of the floating pier between the two side frames of the lifting frame by using steel wire ropes. Then, slowly lower the hook of the lifting device of the lifting frame, and adjust the displacement system on the lifting frame to complete the relative positioning of the upper half of the pier column on the main beam section to be spliced and the upper half of the pier column on the lower part of the floating pier. Then, perform the welding connection between the lower half of the pier column and the upper half of the pier column.

[0015] Step 9: First, use the bridge deck crane to adjust the elevation of the main girder segment to be spliced so that the elevation difference between it and the main girder segment of the assembled floating bridge body meets the requirements of the specification for assembly errors. Then, adjust the displacement system of the fixed lifting frame so that the axis of the main girder segment of the floating bridge monomer to be spliced is aligned with the axis of the main girder segment of the assembled floating bridge body to meet the design and specification requirements. Next, complete the welding work between the main girder segment to be spliced and the main girder segment of the assembled floating bridge body to complete the butt joint installation of the main girder;

[0016] Step 10: First, release the hooks of the lifting device and the bridge deck crane, and then tow the assembled floating bridge body away from the lifting frame;

[0017] Step 11: The bridge deck crane moves forward to the butt joint end of the main girder segment of the assembled floating bridge body;

[0018] Step 12: Repeat Steps 2 to 11 to carry out the assembly construction of the next main girder segment.

[0019] In the above method for hoisting and assembling the fixed support of the floating bridge, when performing Step 1, each side frame includes four steel pipe piles arranged in two rows and two columns, and two longitudinal beams respectively spanning between the tops of the two columns of steel pipe piles.

[0020] In the above method for hoisting and assembling the fixed support of the floating bridge, when performing Step 1, the lifting device includes a lifting jack, a lifting steel wire rope, and a steel wire rope anchor.

[0021] In the above method for hoisting and assembling the fixed support of the floating bridge, when performing Step 1, the displacement system includes a horizontal adjustment oil cylinder installed between the cross beam and the lifting platform, and a longitudinal adjustment oil cylinder installed between the lifting platform and the lifting device.

[0022] The method for hoisting and assembling the fixed support of the floating bridge of the present invention has the following characteristics: A lifting frame is erected on the water, and the lifting operation of the pier column at the lower part of the floating pier is carried out through the lifting device and the displacement system on the lifting frame. Then, the main girder segment to be assembled is successively connected to the upper pier column and the lower part of the floating pier is connected to the upper pier column through the lifting device and the displacement system on the lifting frame. Then, a bridge deck crane is installed at the butt joint end of the main girder segment of the assembled floating bridge body, and the axis between the main girder segment to be assembled and the main girder end of the assembled floating bridge body is jointly adjusted through the lifting device, the displacement system on the lifting frame, and the bridge deck crane and welded, effectively ensuring the assembly accuracy of the main girder. It not only solves the problem that the high pier column and the floating cylinder cannot be towed as a whole, but also solves the problem of difficult assembly of the main girder of the floating bridge with a large longitudinal slope. Description of the Drawings

[0023] Figure 1 It is an elevation view of the jacking support erected when performing Step 1 of the present invention, where, Figure 1(a) is a side view of the jacking support, Figure 1 (b) is Figure 1 the right side view of (a);

[0024] Figure 2 is the state diagram when performing Step 2 of the present invention. Among them, Figure 2 (a) is a side view of the state when performing Step 2 of the present invention, Figure 2 (b) is Figure 2 the right side view of (a);

[0025] Figure 3 is the state diagram when performing Step 3 of the present invention. Among them, Figure 3 (a) is a side view of the state when performing Step 3 of the present invention, Figure 3 (b) is Figure 3 the right side view of (a);

[0026] Figure 4 is the state diagram when performing Step 4 of the present invention. Among them, Figure 4 (a) is a side view of the state when performing Step 4 of the present invention, Figure 4 (b) is Figure 4 the right side view of (a);

[0027] Figure 5 is the side view of the state when performing Step 5 of the present invention;

[0028] Figure 5a is the side view of the bridge deck crane when performing Step 5 of the present invention;

[0029] Figure 6 is the first state side view when performing Step 6 of the present invention;

[0030] Figure 7 is the second state side view when performing Step 6 of the present invention;

[0031] Figure 8 is the first state side view when performing Step 7 of the present invention;

[0032] Figure 9 is the second state side view when performing Step 7 of the present invention;

[0033] Figure 10 is the side view of the state when performing Step 9 of the present invention;

[0034] Figure 11 is the side view of the state when performing Step 10 of the present invention;

[0035] Figure 12 is the side view of the state when performing Step 11 of the present invention. Detailed implementation mode

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] Please refer to Figures 1 to 12 , the fixed support hoisting and assembling method of the floating bridge of the present invention is used to assemble multiple floating bridge monomers into an integral floating bridge; each floating bridge monomer includes a main beam segment 1A and a floating pier 1B connected to the bottom surface of the main beam segment 1A; each floating pier 1B includes a floating barrel 11 and a pier column 12 fixed between the top surface of the floating barrel 11 and the bottom surface of the main beam segment 1A, and the pier column 12 is spliced by a lower half pier column 121 and an upper half pier column 122.

[0038] The fixed support hoisting and assembling method of the floating bridge of the present invention includes the following steps:

[0039] Step 1, erect a lifting frame 2 on the water, and the lifting frame 2 is fixed to the bottom of the water by driving piles; the lifting frame 2 is in a portal shape and is arranged transversely to the bridge, and includes two side frames 2A, two cross beams 20 spanning between the tops of the two side frames 2A, a lifting platform 21 movably installed between the two cross beams 20, a lifting device 2B installed on the lifting platform 21, and a displacement system installed between the two cross beams 20 and the lifting platform 21; each side frame 2A includes four steel pipe piles 211 arranged in two rows and two columns and two longitudinal beams 212 respectively spanning between the tops of the two columns of steel pipe piles 211, and a connecting beam 213 is arranged between the four steel pipe piles 211; the lifting device 2B includes a lifting jack 221, a lifting steel wire rope 222, and a steel wire rope anchor 223; the displacement system includes two lateral adjustment cylinders 231 respectively installed between the two cross beams 20 and the lifting platform 21 and a longitudinal adjustment cylinder 232 installed between the lifting platform 21 and the lifting jack 221 of the lifting device 2B (see Figure 1 );

[0040] Step 2, tow the lower half pier column 121 to the lower part of the lifting frame 2 by a barge 200, lift the lower half pier column 121 by the lifting device 2B on the lifting frame 2, and the barge withdraws from the working range of the lifting frame 2 (see Figure 2 );

[0041] Step 3, tow a floating barrel 11 to the lower part of the lifting frame 2, temporarily fix the floating barrel 11 between the two side frames 2A of the lifting frame 2 by a steel wire rope 110, and limit the floating barrel 11 in the horizontal direction (see Figure 3 );

[0042] Step 4: Slowly lower the lower pier column 121 through the lifting device 2B on the lifting frame 2. When the lower pier column 121 is close to the floating pontoon 11, adjust the docking accuracy between the lower pier column 121 and the bottom of the pier column located at the center of the top surface of the floating pontoon 11 by adjusting the displacement system on the lifting frame 2, and then perform the welding and assembly between the lower pier column 121 and the bottom of the pier column to form the lower part of the floating pier (see Figure 4 ). Then, the lifting device 2B releases the lifting point with the lower pier column 121, and releases the steel wire rope 110 fixing the floating pontoon 11, and tow the assembled lower part of the floating pier out of the working range of the lifting frame 2;

[0043] Step 5: First, use a barge to tow the assembled floating bridge body 100 into position and anchor it. Then, install a bridge deck crane 3 on the top surface of the docking end of the main beam section of the assembled floating bridge body 100; The bridge deck crane 3 is installed on the movable support 30 (see Figure 5 and Figure 5a );

[0044] Step 6: Tow the main beam segment 1A to be spliced into the working range of the lifting frame 2. The hooks of the lifting device 2B on the lifting frame 2 and the hooks of the bridge deck crane 3 are respectively hooked to the lifting lugs on the two ends of the top surface of the main beam segment 1A to be assembled (see Figure 6 ), and the hooks of the lifting device 2B and the bridge deck crane 3 lift the main beam segment 1A to be assembled at the same time (see Figure 7 );

[0045] Step 7: First, tow the upper pier column 122 into position (see Figure 8 ), and then perform the welding connection between the upper pier column 122 and the pier head on the bottom surface of the main beam segment 1A to be spliced (see Figure 9 );

[0046] Step 8: First, tow the assembled lower part of the floating pier into position, and use a steel wire rope to temporarily fix the lower part of the floating pier between the two side frames 2A of the lifting frame 2 to limit the horizontal direction of the lower part of the floating pier. Then, slowly lower the hook of the lifting device 2B of the lifting frame 2, and adjust the displacement system on the lifting frame 2 to complete the relative positioning of the upper pier column 122 on the main beam segment 1A to be spliced and the upper pier column 121 on the lower part of the floating pier. Then, perform the welding connection between the lower pier column 121 and the upper pier column 122;

[0047] Step 9: First, use the bridge deck crane 3 to adjust the elevation of the main beam segment 1A to be spliced so that the elevation difference between it and the main beam segment of the assembled floating bridge body 100 meets the requirements of the specification for assembly errors, and adjust the displacement system of the fixed lifting frame 2 so that the axis of the main beam segment 1A to be spliced and the axis of the main beam segment of the assembled floating bridge body 100 meet the design and specification requirements. Then, complete the welding work between the main beam segment 1A to be spliced and the main beam segment of the assembled floating bridge body 100 to complete the docking installation of the main beam (seeFigure 10 )

[0048] Step ten: First, release the hooks of the lifting device 2B and the deck crane 3, and then tow the assembled floating bridge body away from the lifting frame 2 (see Figure 11 )

[0049] Step eleven: The deck crane 3 moves forward to the docking end of the main girder section of the assembled floating bridge body (see Figure 12 )

[0050] Step twelve: Repeat Steps two to eleven to carry out the assembly construction of the next main girder section.

[0051] The above embodiments are only for illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical fields can also make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention, which should be defined by each claim.

Claims

1. A hoisting and assembling method for the fixed support of a floating bridge, which is used to assemble multiple floating bridge monomers into an integral floating bridge; each floating bridge monomer includes a main beam segment and a floating pier connected to the bottom surface of the main beam segment, and each floating pier includes a floating barrel and a pier column fixed between the top surface of the floating barrel and the bottom surface of the main beam segment. The pier column is spliced by a lower half pier column and an upper half pier column; it is characterized in that, The assembling method includes the following steps: Step 1: Erect a lifting frame on the water. The lifting frame is fixed to the bottom of the water by driving piles. The lifting frame is in a portal shape and is arranged transversely to the bridge. It includes two side frames, two cross beams spanning between the tops of the two side frames, a lifting platform movably installed between the two cross beams, a lifting device installed on the lifting platform, and a displacement system installed between the two cross beams and the lifting platform. Step 2: Use a barge to tow the lower part of the pier column to the lower part of the lifting frame, lift the lower part of the pier column by the lifting device on the lifting frame, and the barge withdraws from the working range of the lifting frame. Step 3: Tow a floating drum to the lower part of the lifting frame and temporarily fix the floating drum between the two side frames of the lifting frame by using steel wire ropes. Step 4: Slowly lower the lower part of the pier column by the lifting device on the lifting frame. When the lower part of the pier column is close to the floating drum, adjust the docking accuracy between the lower part of the pier column and the floating drum by adjusting the displacement system on the lifting frame, then perform the welding and assembling between the lower part of the pier column and the floating drum to form the lower part of the floating pier. Then, release the lifting point of the lifting device from the lower part of the pier column and release the steel wire ropes fixing the floating drum, and tow the assembled lower part of the floating pier out of the working range of the lifting frame. Step 5: First, use a barge to tow the assembled floating bridge body into position and carry out anchor positioning. Then, install a bridge deck crane on the top surface of the docking end of the main beam section of the assembled floating bridge body. Step 6: Tow the main beam section to be spliced into the working range of the lifting frame. The hooks of the lifting device on the lifting frame and the hooks of the bridge deck crane are respectively hooked to the lifting lugs on the two ends of the top surface of the main beam section to be assembled. The hooks of the lifting device and the bridge deck crane lift the main beam section to be assembled at the same time. Step 7: First, tow the upper part of the pier column into position, and then perform the welding connection between the upper part of the pier column and the pier head on the bottom surface of the main beam section to be spliced. Step 8: First, tow the assembled lower part of the floating pier into position and temporarily fix the lower part of the floating pier between the two side frames of the lifting frame by using steel wire ropes. Then, slowly lower the hook of the lifting device of the lifting frame and adjust the displacement system on the lifting frame to complete the relative positioning of the upper part of the pier column on the main beam section to be spliced and the upper part of the pier column on the lower part of the floating pier. Then, perform the welding connection between the lower part of the pier column and the upper part of the pier column. Step 9: First, use the bridge deck crane to adjust the elevation of the main beam section to be spliced so that the elevation difference between it and the main beam section of the assembled floating bridge body meets the requirements of the specification for assembling errors. And adjust the displacement system of the fixed lifting frame so that the axis of the main beam section of the floating bridge monomer to be spliced and the axis of the main beam section of the assembled floating bridge body meet the design and specification requirements. Then, complete the welding work between the main beam section to be spliced and the main beam section of the assembled floating bridge body to complete the docking installation of the main beam. Step 10: First, release the hooks of the lifting device and the bridge deck crane, and then tow the assembled floating bridge body away from the lifting frame. Step 11: The bridge deck crane moves forward to the docking end of the main beam section of the assembled floating bridge body. Step 12: Repeat Steps 2 to 11 to carry out the assembling construction of the next main beam section.

2. The hoisting and assembling method of the fixed bracket of the floating bridge according to claim 1, characterized in that, When performing Step 1, each side frame includes four steel pipe piles arranged in a two-row and two-column manner and two longitudinal beams respectively spanning between the tops of the two columns of steel pipe piles.

3. The hoisting and assembling method of the fixed support of the floating bridge according to claim 1, characterized in that, When performing Step 1, the lifting device includes a lifting jack, a lifting wire rope and a wire rope anchor.

4. The hoisting and assembling method of the fixed support of the floating bridge according to claim 1, characterized in that When performing Step 1, the displacement system includes a lateral adjustment oil cylinder installed between the cross beam and the lifting platform and a longitudinal adjustment oil cylinder installed between the lifting platform and the lifting device.

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