Transverse and longitudinal grid beam hoisting equipment for steel arch bridge construction

Abstract

The utility model discloses transverse and longitudinal grid beam hoisting equipment for steel arch bridge construction, which comprises two side pavement structures and a suspension assembly arranged between the two side pavement structures, and a support framework used for lifting the middle part of the suspension assembly upwards is arranged on the side pavement structures. A triangular lifting frame used for lifting transverse and longitudinal grid beams is installed on the suspension assembly, an inner groove is formed in each side pavement structure, two skewback foundation pits are formed in one side of the bottom wall of each inner groove, and bridge arch frame structures are installed on the two side pavement structures through the skewback foundation pits. A lattice beam structure located below the bridge arch frame structure is placed in the inner groove. Rotation and transportation in the hoisting process of the grid beam structure can be reduced, the situation that the steel longitudinal and transverse grid beams touch the arch rib structure in the hoisting process is avoided, it is guaranteed that the cross braces can be installed on the arch rib structure in time, and therefore arch bridge system transformation and structural stability are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lattice beam hoisting, in particular to a horizontal and vertical lattice beam hoisting device for steel arch bridge construction. Background Art

[0002] The construction method of cable system hoisting is commonly used in the construction of bottom-supported steel arch bridges. The transverse and longitudinal lattice beams of the bridge deck can only be hoisted after the arch ribs are connected. Since the transverse width of each beam section is greater than the distance between the two arch ribs, and a cross brace is usually set between the two arch ribs, the lattice beam cannot be hoisted from top to bottom or horizontally longitudinally due to the obstruction of the cross brace, because the lattice beam is easy to touch the cross brace during the hoisting process. Even if the cross brace is removed, it is easy to touch the arch rib, resulting in damage to the arch rib or overall instability. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a horizontal and vertical lattice beam lifting equipment for steel arch bridge construction, so as to solve the problem mentioned in the above background technology that the lattice beams are easily collided with arch ribs and cross braces during the lifting process, causing damage to the arch ribs and the lattice beams themselves.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a horizontal and vertical lattice beam hoisting device for steel arch bridge construction, comprising two side pavement structures and a suspension assembly installed between the two side pavement structures, a support structure for lifting the middle part of the suspension assembly upward is installed on the side pavement structure, and a triangular hoisting frame for hoisting the horizontal and vertical lattice beams is installed on the suspension assembly;

[0005] An inner groove is provided on the side pavement structure, and two arch seat foundation pits are provided on one side of the bottom wall of the inner groove. A bridge arch frame structure is installed on the two side pavement structures through the arch seat foundation pits. A lattice beam structure located below the bridge arch frame structure is placed in the inner groove, and a pad for raising the height of the lattice beam structure is installed on the bottom wall of the inner groove.

[0006] Preferably, the suspension assembly includes a suspension rope mounted on a supporting structure, and a rope winder is installed on the side pavement structure for controlling the suspension rope to drive the triangular lifting frame and the lattice beam structure to move their positions.

[0007] Preferably, the bridge arch structure includes two arch ribs installed on the side pavement structure, and a plurality of evenly arranged cross braces are installed between the two arch ribs.

[0008] Preferably, the supporting structure includes two steel supports installed on the side pavement structure, a crossbeam for reinforcing the structure is installed between the two steel supports, and a guide wheel for guiding the direction of the suspension rope is installed in the middle of the top surface of the steel support.

[0009] Preferably, the triangular hanging frame comprises a bearing plate installed on a suspension rope, a sling is installed at the bottom of the bearing plate, and a supporting clamp is installed at the tail end of the sling.

[0010] Preferably, a hydraulic cylinder is installed on the top of the supporting fixture, and a limiting clamp adapted to the width of the transverse steel bars in the lattice beam structure is installed on the free end of the hydraulic cylinder, and two upright steel plates are installed on the bottom wall of the supporting fixture.

[0011] Preferably, one side of the limit clamping plate and the upright steel plate are both inclined at an angle of not less than 45°.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides a working platform for assembling the lattice beam structure and combining and connecting it with the triangular hoisting frame on the side pavement structure below the bridge arch frame structure, so that the subsequent suspension components and the triangular hoisting frame can drive the lattice beam structure to move axially along the bottom of the bridge arch frame structure under the cooperation, which can reduce the rotation and transportation of the lattice beam structure during the hoisting process, avoid the situation that the steel longitudinal and transverse lattice beams touch the arch rib structure during the hoisting process, and ensure that the arch rib structure can be installed with cross braces in time, thereby ensuring the conversion of the arch bridge system and the stability of the structure, and the operation is simple and the cost is low.

[0014] 2. During the hoisting process of the utility model, only conventional cranes are required to participate in hoisting and welding. After welding is completed, triangular hoisting frames are set at both ends of the lattice beam. There is no need to change the main structure of the arch rib and the hoisting sequence, so that the safe hoisting of the bridge deck lattice beam can be achieved.

[0015] 3. In addition to using the supporting clamp to clamp the side steel bars of the lattice beam structure, the utility model also uses a downwardly extending hydraulic cylinder to drive a limiting clamping plate to apply a downward extrusion force to the upper side of the side steel bars of the lattice beam structure, which can effectively increase the clamping effect on the lattice beam to maintain its stability during transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the split structure of the side pavement structure and the bridge arch structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the installation structure of the lattice beam structure and the triangular hanging frame of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the triangular hanging frame of the utility model.

[0020] In the figure: 1. Side pavement structure; 101. Inner groove; 102. Arch seat foundation pit; 103. Bridge arch frame structure; 1031. Arch rib; 1032. Cross brace; 104. Lattice beam structure; 105. Pad; 2. Suspension assembly; 201. Suspension rope; 202. Rope winder; 3. Support structure; 301. Steel bracket; 302. Cross beam; 303. Guide wheel; 4. Triangular lifting frame; 401. Load-bearing plate; 402. Lifting rope; 403. Supporting fixture; 4031. Hydraulic cylinder; 4032. Limiting card plate; 4033. Vertical steel plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Steel arch bridges are mainly composed of arch ribs, hangers, tie rods and bridge deck systems. According to the position of the bridge deck system, they can be divided into top-bearing, mid-bearing and bottom-bearing steel arch bridges. For the construction of bottom-bearing steel arch bridges, the construction method of cable system hoisting is often used. After the arch ribs are closed, the horizontal and vertical lattice beams of the bridge deck system can be hoisted. The lattice beams are prefabricated in sections by the factory, and a station is set up near the bridge location for welding, and connected to the arch ribs on both sides through lifting chains. The first common method is to lift the lattice beam segment from the gap between the arch rib and the cross brace to the bridge deck position for welding; the second method is to set up a walkway and a station at the bottom of the valley under the bridge, sink the cable from above the bridge deck to the bottom of the valley, and lift and install it from bottom to top. However, the transverse width of each beam section is greater than the distance between the two arch ribs, and a cross brace is usually set between the two arch ribs. Due to the obstruction of the cross brace, the lattice beam cannot be hoisted from top to bottom or horizontally and longitudinally, because the lattice beam is easy to hit the cross brace during the hoisting process. Even if the cross brace is removed, it is easy to hit the arch rib, resulting in damage to the arch rib or overall instability. To solve this problem, please refer to Figure 1-Figure 4The utility model provides a horizontal and vertical lattice beam hoisting device for steel arch bridge construction, which can realize the safe hoisting of bridge deck lattice beams. The side pavement structure 1 is the road surface on both sides of the mountain canyon. The suspension assembly 2 is installed on the two side pavement structures 1. The two support structures 3 installed on the two side pavement structures 1 are used to lift the middle part of the suspension assembly 2 upward, so that it arches upward and the middle part remains straight. The triangular hoisting frame 4 installed on the suspension assembly 2 is used to cooperate with the suspension assembly 2 to stably transport the lattice beam. An inner groove 101 is excavated on the side pavement structure 1, and two arch seat foundation pits 102 are opened on one side of the bottom wall of the inner groove 101. A bridge arch frame structure 103 is installed on the two side pavement structures 1 through the arch seat foundation pits 102. The bridge arch frame structure 103 includes two arch ribs 1031 installed on the side pavement structure 1, and a number of evenly arranged cross braces 1032 are installed between the two arch ribs 1031. A lattice beam structure 104 located below the bridge arch frame structure 103 is placed in the inner groove 101, and a pad 105 for raising the height of the lattice beam structure 104 is installed on the bottom wall of the inner groove 101. The inner groove 101 serves as a working platform for assembling the lattice beam structure 104 and combining and connecting it with the triangular lifting frame 4. In actual application, the lattice beam structure 104 is restrained by using multiple triangular lifting frames 4 within the range of the inner groove 101. Since the excavated inner groove 101 is located below the bridge arch frame structure 103, when the lattice beam structure 104 is moved with the cooperation of the suspension assembly 2 and multiple triangular lifting frames 4, it can move axially along the bottom of the bridge arch frame structure 103, thereby reducing the rotation and transportation of the lattice beam structure 104 during the lifting process, and avoiding the lattice beam structure 104 touching the bridge arch frame structure 103 during the lifting process.

[0023] In order to ensure that the triangular hanging frame 4 installed on the suspension assembly 2 has mobility, as shown in FIG. Figure 1 and Figure 2 As shown, the suspension assembly 2 includes a suspension rope 201 mounted on the support structure 3, and a rope reel 202 is installed on the side pavement structure 1 for controlling the suspension rope 201 to drive the triangular hoisting frame 4 and the lattice beam structure 104 to move. There are two groups of suspension assemblies 2, which are respectively located on both sides of the bridge arch structure 103, so that the triangular hoisting frames 4 installed on the two suspension assemblies 2 can be suspended on both sides of the bridge arch structure 103, ensuring that the triangular hoisting frames 4 and the clamped lattice beam structure 104 are not restricted when moving. As for the suspension assembly 2 itself, the rope reels 202 at both ends of the suspension rope 201 are used to synchronously perform winding and unwinding operations, so as to give the triangular hoisting frame 4 on the suspension rope 201 mobility.

[0024] In order to reduce the wear degree of the suspension rope 201 when it moves back and forth, Figure 1As shown, the support structure 3 consists of two steel supports 301 installed on the side pavement structure 1, a crossbeam 302 installed between the two steel supports 301 for reinforcing the structure, and a guide wheel 303 installed in the middle of the top surface of the steel support 301 for guiding the direction of the suspension rope 201. The guide wheel 303 is used to prevent the suspension rope 201 from slipping significantly during movement, thereby ensuring the safe and smooth docking of the lattice beam structure 104. At the same time, the surface of the guide wheel 303 is arc-shaped, which can effectively reduce the wear on the suspension rope 201 and the pressure on the contact area, thereby extending the service life of the suspension rope 201.

[0025] like Figure 1 , Figure 3 and Figure 4 As shown, the triangular lifting frame 4 includes a bearing plate 401 fixedly mounted on the suspension rope 201, a sling 402 is fixedly connected to the bottom of the bearing plate 401, a supporting fixture 403 is fixedly connected to the tail end of the sling 402, the spacing between the top wall and the bottom wall of the supporting fixture 403 is set to be greater than the thickness of the lattice beam structure 104, a hydraulic cylinder 4031 is installed on the top of the supporting fixture 403, and a limiting clamp 4032 adapted to the width of the transverse steel bar in the lattice beam structure 104 is installed at the free end of the hydraulic cylinder 4031, and two upright steel plates 4033 are installed on the bottom wall of the supporting fixture 403, and one side of the limiting clamp 4032 and the upright steel plate 4033 are both inclined at an angle of not less than 45°, which is used to expand the opening size of the two, so that the supporting fixture 403 can be more easily connected when the supporting fixture 403 is set on the lattice beam structure 104. In actual application, the supporting clamp 403 is docked on the steel bar on the side of the lattice beam structure 104, and the hydraulic cylinder 4031 is driven to extend downward, thereby driving the limiting clamp 4032 to move downward until it is clamped on the upper side of the steel bar on the side of the lattice beam structure 104, so as to increase the clamping effect of the lattice beam structure 104.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A horizontal and vertical lattice beam hoisting device for steel arch bridge construction, comprising two side pavement structures (1) and a suspension assembly (2) installed between the two side pavement structures (1), characterized in that: The side pavement structure (1) is provided with a support frame (3) for lifting the middle part of the suspension assembly (2) upwards, and the suspension assembly (2) is provided with a triangular hanging frame (4) for hanging the horizontal and vertical lattice beams; The side pavement structure (1) is provided with an inner groove (101), and two abutment foundation pits (102) are provided on one side of the bottom wall of the inner groove (101). A bridge arch frame structure (103) is installed on the two side pavement structures (1) through the abutment foundation pits (102). A lattice beam structure (104) located below the bridge arch frame structure (103) is placed in the inner groove (101), and a pad (105) for raising the height of the lattice beam structure (104) is installed on the bottom wall of the inner groove (101).

2. The equipment for hoisting horizontal and vertical lattice beams for steel arch bridge construction according to claim 1 is characterized in that: The suspension assembly (2) comprises a suspension rope (201) mounted on a support structure (3), and a rope winder (202) is installed on the side pavement structure (1) for controlling the suspension rope (201) to drive the triangular hanging frame (4) and the lattice beam structure (104) to move.

3. The equipment for hoisting horizontal and vertical lattice beams for steel arch bridge construction according to claim 1 is characterized in that: The bridge arch structure (103) comprises two arch ribs (1031) installed on the side pavement structure (1), and a plurality of evenly arranged cross braces (1032) are installed between the two arch ribs (1031).

4. The equipment for hoisting horizontal and vertical lattice beams for steel arch bridge construction according to claim 1 is characterized in that: The support structure (3) comprises two steel supports (301) installed on the side pavement structure (1), a crossbeam (302) for reinforcing the structure is installed between the two steel supports (301), and a guide wheel (303) for guiding the direction of the suspension rope (201) is installed in the middle of the top surface of the steel support (301).

5. The equipment for hoisting horizontal and vertical lattice beams for steel arch bridge construction according to claim 1 is characterized in that: The triangular hanging frame (4) comprises a bearing plate (401) mounted on a suspension rope (201), a sling (402) is mounted at the bottom of the bearing plate (401), and a supporting fixture (403) is mounted at the tail end of the sling (402).

6. The equipment for hoisting horizontal and vertical lattice beams for steel arch bridge construction according to claim 5 is characterized in that: A hydraulic cylinder (4031) is installed on the top of the supporting fixture (403), and a limiting clamp (4032) adapted to the width of the transverse steel bars in the lattice beam structure (104) is installed on the free end of the hydraulic cylinder (4031), and two upright steel plates (4033) are installed on the bottom wall of the supporting fixture (403).

7. The equipment for hoisting horizontal and vertical lattice beams for steel arch bridge construction according to claim 6 is characterized by: One side of the limit clamping plate (4032) and the upright steel plate (4033) are both inclined at an angle of not less than 45°.

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