A method for lateral lifting and horizontal lateral movement installation of steel beams for cross-river steel structure bridges

Abstract

This invention relates to a method for the lateral lifting and horizontal lateral movement installation of steel beams for a cross-river steel structure bridge. Two sets of steel beam assembly supports are erected in the water along the bridge site. Each set consists of a lowering support and a sliding support, with the sliding support being higher than the lowering support. Sliding rails, pulleys, and lifting jacks are installed on the sliding support. The mid-span steel beam is transported to a trestle bridge, where it is first lifted above the lowering support using the lifting jacks, and then slid to a designated position using pulleys. The beam is then placed onto the lowering support. The pulleys and sliding rails on the sliding support are then removed, and the portion of the sliding support above the lowering support is removed, serving as the lowering support for the side span steel beams. The side span steel beams are then hoisted from the bank using a crane. This invention eliminates the need for an underwater crane platform and large lifting equipment, resulting in low construction costs and high safety.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology and relates to the installation of steel beams for cross-river steel structure bridges, specifically to a method for lateral lifting and horizontal transverse movement of steel beams. Background Technology

[0002] like Figure 1 As shown, during the installation of steel beams for a cross-river steel structure bridge, in order to improve construction efficiency, the entire span of the steel beam is usually divided into three large segments, including a mid-span segment 101 and two side-span segments 102. Two steel beam assembly supports 103 are erected in the water. The mid-span segment 101 is erected on the two supports, and the two side-span segments are erected on the piers 100 on both banks and on the supports 103 near the piers. Then, the mid-span segment and the side-span segments are welded on the supports to complete the installation of the steel beam.

[0003] Currently, during steel beam installation, the two side spans are typically erected on the shore using truck cranes. However, the mid-span, being farther from the shore, requires the construction of a beam transport trestle bridge (104) in the water. A crane positioning platform or a submersible tower crane also needs to be erected in the water. A beam transport vehicle carries the mid-span to the trestle bridge, where a submersible crane lifts it onto the two supports. The construction costs of submersible crane platforms and tower cranes are high, and the safety of operating large cranes on water is relatively low. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a method for the lateral lifting and horizontal transverse installation of steel beams in cross-river steel structure bridges. This method mainly solves the installation difficulties in the mid-span section, thereby reducing construction costs and improving construction safety.

[0005] The technical solution of the present invention is as follows:

[0006] A method for lateral lifting and horizontal lateral movement installation of steel beams in a cross-river steel structure bridge, wherein the steel beams of the bridge are divided into a mid-span section and two side-span sections, characterized by comprising the following steps:

[0007] (1) Construct a trestle bridge on one side of the bridge site in the water to form a beam transport channel;

[0008] (2) setting two groups of steel beam assembling supports along the bridge position in water, each group of steel beam assembling support is divided into a beam falling support and a sliding support, each group of steel beam assembling support includes three rows of steel pipe piles arranged in the transverse bridge direction, adjacent steel pipe piles are connected through horizontal ties and inclined braces, wherein one row of steel pipe piles closer to the midspan is a beam falling support steel pipe pile, a bearing beam is set on the beam falling support steel pipe pile to form the beam falling support, the height of the beam falling support is consistent with the assembling height of the steel beam, one row of steel pipe piles closer to the bank and one row of steel pipe piles in the middle are sliding support steel pipe piles, the height of the sliding support steel pipe piles is higher than that of the beam falling support steel pipe piles, track beams are respectively set on the two rows of sliding support steel pipe piles, sliding rails are laid on the track beams to form the sliding support, one end of the track beam of the sliding support extends above the trestle;

[0009] a trolley sliding along the two sliding rails is respectively arranged on the sliding support of each group of steel beam assembling supports, a vertical through-hole jack is arranged on each trolley, and a lifting rod is arranged through the jack;

[0010] (3) the steel beam of the midspan section is transported to the trestle through the beam transporting vehicle, the trolleys are moved above the trestle by the pushing oil cylinders on the two sliding supports, the lower ends of the two lifting rods are respectively connected with the two ends of the steel beam, the jack is started to lift the steel beam to be higher than the beam falling support through the lifting rod, then the trolleys are moved to the above of the steel beam installation position along the sliding rails by starting the pushing oil cylinders, and then the two ends of the steel beam are lowered to the two beam falling supports by controlling the jack;

[0011] (4) the trolleys are returned to the above of the trestle by the pushing oil cylinders, and step (3) is repeated to lift each steel beam of the midspan section to the beam falling support;

[0012] (5) the trolleys, the sliding rails and the track beams on the sliding support are removed, the part of the sliding support steel pipe piles higher than the beam falling support is removed, the bearing beam is set on the sliding support steel pipe piles after the height is reduced to serve as the beam falling support of the side span section steel beam, and the side span section steel beam is hoisted by the automobile crane on the bank.

[0013] The present application improves the existing steel beam assembling support, sets the sliding support and the beam falling support, sets the trolley on the sliding support, lifts the steel beam through the jack, and moves and erects the steel beam through the sliding method, so that the water hoist station platform and the tower crane are not needed, the water steel beam hoisting problem is effectively solved, the cost is low, and the safety is high. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the cross-river steel beam segmented installation structure;

[0015] Figure 2 is a schematic diagram of the support along the bridge direction of the present application;

[0016] Figure 3 This is a schematic diagram of the planar structure of the support frame of the present invention;

[0017] Figure 4 This is a schematic diagram of the transverse bridge structure of the support frame of the present invention;

[0018] Figure 5 This is a schematic diagram of the bridge-direction structure of the pulley on the support;

[0019] Figure 6 This is a schematic diagram of the planar structure of the trolley on the support;

[0020] Figure 7 This is a schematic diagram of the transverse bridge structure of the trolley on the support;

[0021] Figure 8 This is a schematic diagram of the longitudinal state of the steel beam being lifted and slid along the bridge according to the present invention;

[0022] Figure 9 This is a schematic diagram of the transverse bridge state of the steel beam being lifted and slid in accordance with the present invention;

[0023] Figure 10 This is a schematic diagram showing the transverse state of the bridge with all the mid-span steel beams installed in place.

[0024] Figure 11 This is a schematic diagram showing the installation status of the side span steel beam. Detailed Implementation

[0025] The specific construction method of this invention is as follows:

[0026] (1) Press Figure 1 The steel beam segmentation method shown divides the entire span into three large segments, including a mid-span segment 101 and two side-span segments 102. A trestle bridge 104 is erected on one side of the bridge site in the water as a beam transport channel. This step is the same as the conventional construction method.

[0027] (2) Figure 2 , Figure 3 , Figure 4As shown in the drawings, two sets of steel beam assembling supports are arranged along the bridge position in water, and the distance between the two sets of steel beam assembling supports is appropriately set according to the length of the midspan section of the steel beam. Unlike the traditional steel beam assembling support, the present application divides each set of steel beam assembling support into two parts, a beam falling support 1 and a sliding support 2. Each set of steel beam assembling support includes three rows of steel pipe piles arranged in the transverse direction of the bridge, and the adjacent steel pipe piles are connected by horizontal ties and diagonal braces. The row of steel pipe piles closer to the midspan is the beam falling support steel pipe pile 11, and the load-bearing beam 12 is arranged on the beam falling support steel pipe pile to form the beam falling support 1. The height of the beam falling support is consistent with the assembly height of the steel beam. The row of steel pipe piles closer to the shore and the middle row of steel pipe piles are the sliding support steel pipe piles 21, and the height of the sliding support steel pipe piles 21 is higher than that of the beam falling support steel pipe piles 11. Track beams 22 are arranged on the two rows of sliding support steel pipe piles, respectively, and sliding rails 23 are arranged on the track beams to form the sliding support 2. One end of the track beam 22 of the sliding support extends above the trestle 104, which facilitates lifting the steel beam from the trestle. Diagonal braces 24 can be welded between the front end of the track beam 22 and the sliding support steel pipe pile 21 to prevent the track beam from deflecting when bearing load.

[0028] Referring to Figure 5 、 Figure 6 、 Figure 7 As shown in the drawings, a trolley 3 is arranged on the sliding support 2 of each set of steel beam assembling support to slide along the two sliding rails. A through jack 4 is vertically arranged on each trolley 3, and a lifting rod 5 is arranged through the jack 4. A jacking oil cylinder 6 is arranged on each sliding rail, and one end of the jacking oil cylinder 6 is connected with the sliding rail 23 through a rail clamp 7, and the other end is connected with the trolley through a pin shaft. The jacking oil cylinder 6 can push or pull the trolley to move along the sliding rail. When the oil cylinder is jacked, the rail clamp 7 is clamped with the sliding rail. After each stroke of the rail clamp 7, the rail clamp 7 is clamped with the sliding rail again, and the oil cylinder starts the next stroke. The cycle is repeated until the trolley is jacked or pulled to the designated position.

[0029] As shown in the drawings, Figure 5 、 Figure 6 、 Figure 7 As a specific embodiment of the present application, the trolley 3 includes two longitudinal beams 31 arranged in the longitudinal direction of the bridge, and two pulleys 32 are arranged on the bottom of each longitudinal beam to slide along the two sliding rails. Two cross beams 33 are welded on the two longitudinal beams, and the jack 4 is arranged on the cross beam 33 closer to the midspan.

[0030] In the embodiment of the present application, the track beam 22 on the sliding support can adopt double-spliced I-beams, and the slide rails 23 are welded on the top surface of the flange plate of the track beam in the transverse bridge direction. Since the jack is arranged on one side of the trolley, in order to avoid the trolley from overturning due to uneven force when the jack lifts the steel beam, an L-shaped limiting rod 34 can be arranged on the bottom of each longitudinal beam of the trolley towards the end of the side span, the upper end of the limiting rod 34 is welded with the bottom of the longitudinal beam 31, and the lower end of the limiting rod 34 extends below the upper flange plate of the track beam 22, the lower end of the L-shaped limiting rod functions as a hook, when the trolley lifts the steel beam, the lower end of the limiting rod is clamped on the bottom surface of the upper flange plate of the track beam, which can prevent the trolley from overturning.

[0031] Further, as shown in Figure 5 , a guide wheel 35 can be arranged on the top surface of the part where the limiting rod 34 extends below the upper flange plate of the track beam 22, when the trolley slides along the guide rail, the guide wheel 35 can slide along the lower flange plate of the track beam, which reduces the friction between the limiting rod and the bottom surface of the upper flange plate of the track beam.

[0032] (3) As shown in Figure 8 and Figure 9 , and referring to Figures 2 to 4 , the steel beam 101 of the mid-span section is transported to the trestle 104 by the beam transport vehicle, the trolley 3 on the two sliding supports is moved above the trestle by the pushing oil cylinder, the lower ends of the two hangers 5 are connected with the two ends of the steel beam 101 of the mid-span section respectively, the jack 4 is started to lift the hanger 5, the steel beam 101 is lifted to be higher than the beam lowering support 1, then the trolley 3 is moved to the position above the steel beam installation position along the slide rail by the pushing oil cylinder 6, and the two ends of the steel beam are lowered to the two beam lowering supports 1 by controlling the jack, thereby completing the erection of the steel beam 101 of the mid-span section.

[0033] (4) As shown in Figure 10 , the trolley is returned to the trestle by the pushing oil cylinder, and the step (3) is repeated, so that the steel beam 101 of each mid-span section is lifted to the beam lowering support 1 in sequence.

[0034] (5) As shown in Figure 11 , after all the steel beams of the mid-span section are hoisted in place, the trolley, the slide rail and the track beam on the sliding support are removed, and the part of the sliding support steel pipe pile 21 which is higher than the beam lowering support steel pipe pile 11 is removed, the load-bearing beam is arranged on the sliding support steel pipe pile 21 after the height is reduced, which is used as the beam lowering support of the side span section, and the steel beam 102 of the side span section is hoisted by the truck crane.

[0035] In the embodiment of the present application, the sliding support steel pipe pile 21 can adopt an integral steel pipe pile, after the trolley and the track beam on the sliding support are removed, the part of the sliding support steel pipe pile which is higher than the beam lowering support steel pipe pile can be directly cut off, and the load-bearing beam is arranged on the steel pipe pile after the height is reduced, which is used for erecting the steel beam of the side span section.

[0036] As shown in Figure 2As shown in the middle, in order to improve the reuse rate of the steel pipe pile, the sliding support steel pipe pile 21 can also adopt a combined structure, including two segments, the height of the lower segment 211 is equal to the height of the beam support steel pipe pile 11, and the upper segment 212 is connected with the lower segment through the flange 213. After the trolley and the track beam on the sliding support are removed, the upper segment of each row of sliding support steel pipe piles is removed, and the load-bearing beam is erected on the lower segment to support the erection of the side span segment steel beam.

Claims

1. A method for installing a steel beam of a steel structure bridge across a river by lifting and horizontally moving the steel beam from a side position, wherein the steel beam of the steel structure bridge is divided into a midspan section and two side span sections, and characterized in that, The method comprises the following steps: (1) erecting a trestle on one side of the bridge site in water to form a beam transportation channel; (2) erecting two groups of steel beam assembling supports along the bridge site in water, each group of steel beam assembling support comprising a beam falling support and a sliding support, each group of steel beam assembling support comprising three rows of steel pipe piles arranged in the transverse direction of the bridge, the steel pipe piles being connected by horizontal ties and diagonal braces, wherein one row of steel pipe piles closer to the midspan is the beam falling support steel pipe pile, a load bearing beam is erected on the beam falling support steel pipe pile to form the beam falling support, the height of the beam falling support is consistent with the assembling height of the steel beam, one row of steel pipe piles closer to the bank and one row of steel pipe piles in the middle are the sliding support steel pipe piles, the height of the sliding support steel pipe piles is higher than that of the beam falling support steel pipe piles, track beams are respectively erected on the two rows of sliding support steel pipe piles, and sliding rails are laid on the track beams to form the sliding support, one end of the track beam of the sliding support extends above the trestle; a trolley sliding along the two sliding rails is arranged on the sliding support of each group of steel beam assembling support, a vertical through-center jack is arranged on each trolley, and a suspender is arranged in the through-center jack; (3) a steel beam in the midspan section is transported to the trestle by a beam transportation vehicle, the trolleys are moved above the trestle by the thrusting oil cylinders on the two sliding supports, the lower ends of the two suspenders are respectively connected to the two ends of the steel beam, the jack is started to lift the steel beam to a position higher than the beam falling support through the suspender, then the trolleys are moved to a position above the assembling position of the steel beam along the sliding rails by starting the thrusting oil cylinders, and the jack is controlled to lower the two ends of the steel beam to the two beam falling supports; (4) the trolleys are returned to above the trestle by the thrusting oil cylinders, and step (3) is repeated to lift each steel beam in the midspan section to the beam falling support; (5) the trolleys, the sliding rails and the track beams on the sliding support are removed, the part of the sliding support steel pipe pile higher than the beam falling support is removed, a load bearing beam is erected on the sliding support steel pipe pile after the height is reduced to serve as a beam falling support of a side span section steel beam, and the side span section steel beam is hoisted by a truck crane.

2. The steel beam side lifting and horizontal moving installation method of the steel structure bridge across the river according to claim 1, characterized in that: The trolley comprises two longitudinal beams arranged in the longitudinal direction of the bridge, each longitudinal beam is provided with two pulleys sliding along the two sliding rails at the bottom, two cross beams are welded to the two longitudinal beams, and the jack is arranged on the cross beam closer to the midspan.

3. The steel beam side lifting and horizontal moving installation method of the steel structure bridge across the river according to claim 2, characterized in that: The track beam on the sliding support is made of double-spliced I-beams, and the sliding rails are welded to the top surface of the flange plate of the track beam in the transverse direction of the bridge.

4. The steel beam side lifting and horizontal moving installation method of the steel structure bridge across the river according to claim 3, characterized in that: The bottom part of each longitudinal beam of the trolley towards the end of the side span is respectively provided with an L-shaped limiting rod, the upper end of the limiting rod is welded to the bottom of the longitudinal beam, and the lower end of the limiting rod extends below the upper flange plate of the track beam.

5. The method for installing the steel beam of the steel bridge across a river according to claim 1, wherein: The top surface of the part of the limiting rod extending below the upper flange plate of the track beam is provided with a guide wheel. The sliding support steel pipe pile comprises two segments arranged in the vertical direction, the height of the lower segment is equal to that of the beam falling support steel pipe pile, and the upper segment and the lower segment are connected by flanges; after the hoisting of all the steel beams in the midspan section is completed, the trolleys, the sliding rails and the track beams on the sliding support are removed, the upper segment of each row of sliding support steel pipe piles is removed, and a load bearing beam is erected on the lower segment to support the steel beam in the side span section.

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