Assembly type lifting structure for steel box arch lifting construction

Abstract

The utility model relates to an assembly type lifting structure for lifting construction of a steel box arch. The device comprises a lifting joist, a lifting sling and a lifting anchor box. The fabricated lifting structure for lifting construction of the steel box arch has three control key points: firstly, the lifting joist is connected with the steel box girder base through bolts, so that quick assembly and component turnover can be realized; the lifting joist and the lifting anchor box are connected with the upper lug plate and the lower lug plate in a plug-pin mode through the lifting sling, it is guaranteed that the force transmission path is clear and reliable, meanwhile excessive welding on a steel box vault bottom plate is avoided, and the construction progress quality is improved; a plurality of bolt lug plates are arranged on the lifting joist and the lifting anchor box, and the positions and the number of lifting straps can be adjusted on site according to the width of the steel box girder and the lifting weight. The lifting structure is convenient to machine, simple in structure, capable of achieving construction turnover and high in practicability, lifting and hoisting construction of most steel box arches can be met under the condition that the safety of the lifting structure is guaranteed, and the construction quality and efficiency are effectively improved.

Description

Technical field:

[0001] The utility model relates to the lifting construction of steel box arch ribs. Specifically, it relates to an assembled lifting structure for steel box arch lifting construction. The utility model is applicable to the design and construction of assembled lifting structures with different steel box arch rib heights and different steel box arch rib widths. Background technology:

[0002] As my country's bridge industry matures, more and more steel box arch bridges are used in municipal bridges, rivers, lakes, and shallow hills. Through the continuous innovation of my country's intelligent bridge construction technology, the new method of "first laying down and then lifting as a whole" has gradually been added to the traditional classic arch bridge construction technology such as inclined-stayed buckle hanging and full-span in-situ brackets. This is especially true in the construction of large-span steel box structure arches across river basins in urban areas. When the rise of the steel box arch is too high and the structural components are heavy, the use of traditional full-span bracket construction technology requires high lifting equipment and poor stability of the bracket erection. It is easy to process, simple to construct, has a fast construction turnover, and is highly practical. It can meet the needs of most steel box arch lifting and hoisting construction while ensuring the safety of the lifting structure. It is particularly important to have an assembled lifting structure that can effectively improve construction quality and efficiency. This patent is an assembled lifting structure for steel box arch lifting construction. Utility model content:

[0003] Deficiencies of traditional technology: The lifting structure of traditional arch rib lifting construction often does not have separate lifting beams, lifting slings and lifting anchor boxes. Traditional structures often replace lifting beams, lifting slings and lifting anchor boxes by directly welding lifting lugs on the steel box arch ribs. On the other hand, the bottom supporting beams are directly welded to the bottom steel box arch ribs to form a supporting beam structure, and then the lifting slings and lifting anchor boxes are installed. The above construction method will directly lead to excessive welding between temporary lifting components and steel box arch rib structures, a long construction period, and difficulty in cutting and dismantling the high-altitude structure after it is lifted into place. At the same time, it will also lead to adverse effects such as stress concentration and deformation of the steel box beam due to welding and direct lifting. After the lifting structure is welded and cut, the secondary use and turnover of the components are poor. This leads to poor construction quality of the steel box arch and poor economic benefits.

[0004] The purpose of this utility model: In view of the characteristics of poor construction efficiency, poor construction quality and poor economic benefits of the traditional arch rib lifting, an assembled lifting structure for steel box arch lifting construction is proposed. This structure consists of three major parts: a lifting support beam, a lifting sling and a lifting anchor box. Mainly through the bolt connection between the lifting support beam and the steel box beam base, rapid assembly and component turnover can be achieved; the lifting support beam and the lifting anchor box are connected to the upper and lower ear plate pins through the lifting sling to ensure a clear and reliable force transmission path, while avoiding excessive welding directly on the bottom plate of the steel box arch, thereby improving the quality of construction progress; at the same time, multiple pin ear plates are set on the lifting support beam and the lifting anchor box, and the position and number of the lifting slings can be adjusted on site according to the width of the steel box beam and the lifting weight. This lifting structure is easy to process, simple in structure, has a fast construction turnover and strong practicality. It can meet the needs of most steel box arch lifting and hoisting construction while ensuring the safety of the lifting structure, and effectively improves the construction quality and efficiency.

[0005] Principle of the present invention:

[0006] A prefabricated lifting structure for steel box arch lifting construction is characterized in that a lifting joist is arranged at the lower part of the steel box beam, the lower base of the steel box beam is connected to the lifting joist by bolts 2, lifting slings are arranged on both sides of the steel box beam web, and a lifting anchor box is arranged at the top of the steel box beam. The lifting slings are used to effectively connect the lifting joist and the lifting anchor box through pins, and a steel strand lifting hole is provided on the lifting anchor box. The lifting anchor box is driven by the lifting steel strand to lift the steel box arch.

[0007] The advantages of the present invention are: 1. A lifting support beam is provided at the lower part of the steel box girder, and this structure serves as a steel box arch supporting structure, with 3-4 lower lifting ear plates at the upper edges of both ends. 2. The lower base of the steel box girder is connected to the lifting support beam by bolts, that is, bolt holes are provided on the lower bottom plate of the steel box girder and the upper steel plate of the lifting support beam, and bolt connection is adopted, with the number of bolts being no less than 8, to ensure installation quality and convenient dismantling. 3. Lifting slings are provided on both sides of the steel box girder web, and the length of the lifting slings must ensure that the distance between the lifting anchor box and the upper steel plate of the steel box arch rib is greater than 1m. Lifting ear holes are provided on the lifting slings, and the lower lifting ear holes are provided as round holes, and the upper lifting ear holes are provided as elliptical holes, to facilitate component installation and positioning. 4. A lifting anchor box is provided at the top of the steel box girder, serving as a steel box arch lifting shoulder pole structure, with 3-4 lower lifting ear plates provided at the lower edges of both ends. 5. Use lifting slings to effectively connect the lifting beam and the lifting anchor box through pins. The number and position of the slings can be adjusted according to the lifting weight of the steel box arch and the width of the steel box arch ribs at the construction site. At the same time, the length of the pins can be adjusted according to the number and position of the slings. 6. Set steel strand lifting holes on the lifting anchor box. The lifting anchor box is driven by the steel strands to lift the steel box arch. There are three steel strand lifting holes on the lifting anchor box, of which the two outer ones serve as the main lifting holes and the middle one serves as the backup lifting hole. The number of lifting steel strands is set according to the weight of the steel box arch to ensure sufficient safety factor. Description of the drawings:

[0008] Figure 1 This is a schematic diagram of the side elevation of an assembled lifting structure for steel box arch lifting construction; the diagram mainly reflects the side elevation structural layout of the assembled lifting structure, and illustrates the positions of the lifting beams, lifting slings, lifting anchor boxes, and lifting steel strands.

[0009] Figure 2 This is a schematic diagram of the side elevation 1-1 of a prefabricated lifting structure for steel box arch lifting construction; the figure mainly reflects the cross-sectional structural layout of the prefabricated lifting structure, and illustrates the positions of the lifting beams, lifting slings, lifting anchor boxes, and lifting steel strands.

[0010] Figure 3 This is a three-view drawing of the components of the lifting beam structure in a prefabricated lifting structure for steel box arch lifting construction.

[0011] Figure 4 This is a three-view drawing of the components of the lifting anchor box assembly in a prefabricated lifting structure for steel box arch lifting construction.

[0012] Figure 5 This is a flat side schematic diagram of the components of the lifting sling in an assembled lifting structure for steel box arch lifting construction.

[0013] In the figure: 1-steel box arch rib, 2-lifting joist, 3-lifting sling, 4-lifting anchor box, 5-latch, 6-lifting steel strand, 7-lower lifting ear hole; 8-upper lifting ear hole, 9-lower lifting ear plate, 10-upper lifting ear plate, 11-steel strand lifting hole, 12-bolt hole. Specific implementation method:

[0014] In order to make the purpose and technical solution of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention.

[0015] like Figure 1-Figure 5 As shown, an assembled lifting structure for steel box arch lifting construction mainly includes three parts. The first part is the lifting beam structure, which consists of a lifting beam 2, a lower lifting ear plate 9, and a bolt hole 12; the second part is the lifting sling hoisting component, which consists of a lifting sling 3, a pin 5, a lower lifting ear hole 7, and an upper lifting ear hole guardrail 8; the third part is the lifting anchor box structure, which consists of a lifting anchor box 4, an upper lifting ear plate 10, a steel strand lifting hole 11, and a lifting steel strand 6, which together constitute the assembled lifting structure of the steel box arch rib 1.

[0016] The specific implementation steps are as follows:

[0017] Step 1: Determine the lifting structure position for arch rib lifting based on the lifting weight and structural layout of the steel box arch;

[0018] Step 2: Use bolts to bolt the lifting joist 2 and the lifting anchor box 4 together;

[0019] Step 3: Adjust the number and position of slings according to the lifting weight of the steel box arch and the width of the steel box arch rib 1 at the construction site, install the lifting sling 3, and secure it with the pin 5;

[0020] Step 4: Install the upper anchor box. Before installing the lifting steel strand 6 on the anchor box, use a manual hoist to fix the upper anchor box.

[0021] Step 5: Set the number of steel strands according to the weight of the steel box arch lifting, and pass the steel strands through the steel strand lifting holes 11 on both sides of the lifting anchor box;

[0022] Step 6: The lifting structure is completed safely, inspected and accepted, and trial hoisted and operated.

Claims

1. A steel box arch lifting construction assembled lifting structure, characterized in that: A lifting joist (2) is provided at the lower part of the steel box girder, the lower base of the steel box girder is connected to the lifting joist (2) by bolts, lifting slings (3) are provided on both sides of the web of the steel box girder, a lifting anchor box (4) is provided at the top of the steel box girder, the lifting joist (2) and the lifting anchor box (4) are effectively connected by means of the lifting slings (3) through a latch (5), a steel strand lifting hole (11) is provided on the lifting anchor box (4), and the steel strand drives the lifting anchor box (4) to lift and hoist the steel box arch.

2. The assembled lifting structure for steel box arch lifting construction according to claim 1 is characterized by: A lifting support beam (2) is provided at the lower part of the steel box beam, and the structure serves as a steel box arch lifting structure, and 3-4 lower lifting lug plates (9) are provided at the upper edges of both ends.

3. The assembled lifting structure for steel box arch lifting construction according to claim 1 is characterized by: The lower base of the steel box beam is connected to the lifting joist (2) by bolts, that is, bolt holes (12) are provided on the lower base plate of the steel box beam and the upper steel plate of the lifting joist, and the bolt connection is adopted, and the number of bolts is not less than 8.

4. The assembled lifting structure for steel box arch lifting construction according to claim 1 is characterized by: The lifting slings (3) are arranged on both sides of the web of the steel box beam, and the length of the lifting slings (3) needs to ensure that the distance between the lifting anchor box (4) and the upper steel plate of the steel box arch rib (1) is greater than 1m. The lifting slings (3) are provided with lifting ear holes, the lower lifting ear hole (7) is set as a circular hole, and the upper lifting ear hole (8) is set as an elliptical hole.

5. The assembled lifting structure for steel box arch lifting construction according to claim 1 is characterized by: The lifting anchor box (4) is arranged at the top of the steel box beam, and the structure serves as a steel box arch lifting shoulder pole structure, and 3-4 lower lifting lug plates (9) are arranged at the lower edges of both ends.

6. The assembled lifting structure for steel box arch lifting construction according to claim 1 is characterized by: The lifting slings are used to effectively connect the lifting beam (2) and the lifting anchor box (4) through the latch (5). The number and position of the slings need to be adjusted according to the lifting weight of the steel box arch and the width change of the steel box arch rib (1) at the construction site, and the length of the latch (5) needs to be adjusted according to the number and position of the slings.

7. The assembled lifting structure for steel box arch lifting construction according to claim 1 is characterized by: The lifting anchor box (4) is provided with a steel strand lifting hole (11), and the lifting anchor box (4) is driven by the lifting steel strand to lift the steel box arch, that is, three steel strand lifting holes (11) are provided on the lifting anchor box (4), wherein the two outer ones serve as main lifting holes, and the middle one serves as a spare lifting hole. The number of lifting steel strands (6) is set according to the weight of the steel box arch to be lifted, so as to ensure a sufficient safety factor.

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