Steel structure hoisting vertical load transmission system on basement top plate

Abstract

The utility model provides a vertical load transmission system for hoisting a steel structure on a basement top plate, which relates to the technical field of hoisting of the steel structure on the basement top plate and comprises two symmetrically arranged supporting seats, the supporting seats are respectively arranged on two sides of a crane, and supporting legs on two sides of the crane are respectively arranged on the two supporting seats. The device has the characteristics of easiness in material taking and manufacturing, convenience in operation, wide application range and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure hoisting on the basement top slab, in particular to a vertical load transfer system for steel structure hoisting on the basement top slab. Background Technique

[0002] With the development of urban construction, the scale of urban construction has been gradually expanded, and the construction party is more inclined to utilize underground space and adopt lightweight and high-strength steel structures to meet the growing use requirements. For the hoisting and splicing of conventional steel structures, a crane is used for operation on the basement top slab. To ensure the safety of the basement top slab, a scaffolding needs to be erected at the corresponding position below the hoisting area for back support. The back support range often needs to cover the entire crane travel route, with a large amount of work and seriously affecting the progress of subsequent construction processes in the basement. Experienced steel structure units will also adopt construction measures such as roadbed boxes. However, due to the size limitation of the roadbed boxes, the roadbed boxes at the four support points of the crane cannot be ensured to be erected on the top slab beams, and it may still cause cracking and leakage of the top slab, resulting in irreparable consequences. Summary of the Invention

[0003] In view of the above-mentioned prior art, the utility model proposes a vertical load transfer system for steel structure hoisting on the basement top slab.

[0004] A vertical load transfer system for steel structure hoisting on the basement top slab provided by the utility model includes two symmetrically arranged support seats, the support seats are respectively placed on both sides of the crane, and the outriggers on both sides of the crane are respectively placed on the two support seats.

[0005] Preferably, the support seat includes two symmetrically arranged support beams, and the two support beams are connected by several connecting beams.

[0006] Preferably, the support beam is made of an I-beam with a height of 50 cm, the length of the support beam is 7 m, and the connecting beam is made of an I-beam with a height of 20 cm.

[0007] Preferably, the distance between the two support beams is 1 m.

[0008] Preferably, the distance between the two support seats is 1 m, and the outriggers of the crane cover a top slab area of not less than 250 ㎡ after being extended.

[0009] Preferably, a backing plate is arranged between the outrigger of the crane and the support seat.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: The utility model provides a vertical load transfer system for steel structure hoisting on the basement top slab, which can eliminate the back topping of the scaffolding under the basement top slab. On the basis of ensuring the safety of the top slab, it saves the material cost of scaffolding erection and labor input, and can thus advance the decoration work of the basement in advance, which is beneficial to the traffic organization of the basement and improves the comprehensive benefits of the project. This system is easy to use, durable and stable, and the reinforcement method is safe and reliable. It can be extended and applied to various working conditions where heavy vehicles drive onto the top slab, such as tower crane demolition and prefabricated hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. is a schematic structural diagram of the vertical load transfer system for steel structure hoisting on the basement top slab in an embodiment of the utility model.

[0012] Figure 2 FIG. is a schematic structural diagram of the support base in an embodiment of the utility model.

[0013] In the figure, 1, support base; 2, crane; 3, outrigger; 4, backing plate; 5, support beam; 6, connecting beam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In order to make the technical means, creative features, achieved purposes and effects of the utility model easy to understand, the utility model will be further described below in conjunction with specific embodiments.

[0015] Embodiment: As Figure 1 - Figure 2 shown, a vertical load transfer system for steel structure hoisting on the basement top slab includes two symmetrically arranged support bases 1, the support bases 1 are respectively placed on both sides of the crane 2, the outriggers 3 on both sides of the crane 2 are respectively placed on the two support bases 1, a square backing plate 4 is arranged between the outrigger 3 and the support base 1, the distance between the two support bases 1 is 1 m, and the four outriggers 3 of the crane 2 cover an area of not less than 250 ㎡ of the top slab after being extended to ensure the stability of hoisting and the anti-overturning requirements.

[0016] Furthermore, the support base 1 includes two symmetrically arranged support beams 5, the two support beams 5 are connected by several connecting beams 6, the support beam 5 is made of I-beam with a height of 50 cm, the length of the support beam 5 is 7 m, the connecting beam 6 is made of I-beam with a height of 20 cm, and the distance between the two support beams 1 is 1 m.

[0017] In this embodiment, components such as steel beams and steel columns are constructed in the form of single-piece hoisting. The crane 2 transfers the self-weight and lifting load of the crane to the top slab through the four outriggers 3. Therefore, as long as the I-beam can span the basement top slab beam and has sufficient height, the point load can be converted into a uniform load. The I-beam needs to span two beam-slab spans, and through the conduction of force to the beam-slab and then to the column, the purpose of replacing the basement back topping is achieved.

[0018] During the process of hoisting large components, the crane generally needs to be able to rotate 360°. Considering the worst hoisting condition of the crane, that is, when side-hoisting, one side of the wheels is stressed and the other side of the wheels leaves the ground; when directly hoisting, the front part bears the load and the rear part leaves the ground, while all four outriggers 3 are stressed throughout the process. In this case, at least 1 / 2 of all the weights are borne by the foundation of the I-beam support seat. From this, the bearing capacity of the foundation per unit area can be calculated as follows:

[0019] P = K(G1 + G2 + G3 + G4 + G5) / (a * b * n * 2);

[0020] G1 - The weight of the steel structure to be hoisted;

[0021] G2 - The self-weight of the crane;

[0022] G3 - The lifting counterweight of the crane;

[0023] G4 - The crane's rigging and balance beam;

[0024] G5 - The weight of the I-beam;

[0025] n - The number of I-beams;

[0026] a - The bottom area of the I-beam;

[0027] b - The stress diffusion coefficient (50 cm, 3);

[0028] k - The safety factor, 1.2 - 1.4;

[0029] P - The bearing capacity per unit area of the I-beam foundation;

[0030] Taking a 50-ton truck crane as an example, the self-weight and accessories are about 50 t, the weight of the steel structure is 10 t, and the weight of 2 sets of I-beams is 5 t. It can be calculated that P = (50 + 10 + 5) * 10 * 1.2 / (1 * 14 * 2 * 3) = 9.28 KN / ㎡ < 20 KN / ㎡ (the live load of the designed fire access roof).

[0031] By analyzing the forces of the crane weight, crane position, and hoisting load, the bearing capacity per unit area of the I-beam foundation can meet the reserved load value of the basement roof, and this embodiment can be adopted for vertical load transfer.

[0032] The above is only the implementation mode of the present invention, and it does not limit the patent scope of the present invention accordingly. Any equivalent solutions made by using the content of the specification of the present invention and directly or indirectly applied in other related technical fields are similarly within the patent protection scope of the present invention.

Claims

1. A vertical load transfer system for steel structure hoisting on the basement roof, characterized in that, It includes two symmetrically arranged support seats, which are respectively placed on both sides of the crane, and the outriggers on both sides of the crane are respectively placed on the two support seats.

2. The vertical load transfer system for steel structure hoisting on the basement roof as described in claim 1, wherein The support seat includes two symmetrically arranged support beams, and the two support beams are connected by several connecting beams.

3. The vertical load transfer system for steel structure hoisting on the basement roof as described in claim 2, characterized in that The support beam is made of I-beam with a height of 50 cm, the length of the support beam is 7 m, and the connecting beam is made of I-beam with a height of 20 cm.

4. The vertical load transfer system for steel structure hoisting on the basement top slab as claimed in claim 2 or 3, wherein The distance between the two support beams is 1 m.

5. The vertical load transfer system for steel structure hoisting on the basement roof as described in any one of claims 1 to 3, characterized in that, The distance between the two support seats is 1 m, and the outriggers of the crane cover a roof area of not less than 250 ㎡ after being extended.

6. The vertical load transfer system for steel structure hoisting on the basement roof as described in any one of claims 1-3, wherein, There is a backing plate between the outrigger of the crane and the support seat.

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