Pi-shaped steel-concrete composite beam hoisting mechanism

Abstract

The utility model provides a hoisting mechanism for a steel-concrete composite beam shaped like a Chinese character'pi ', which comprises two hoisting assemblies distributed along the longitudinal direction, each hoisting assembly comprises a hoisting block connected with hoisting equipment, two hoisting lugs distributed along the transverse bridge direction and two rope penetrating holes arranged on a bridge deck and distributed along the transverse bridge direction, the two lifting lugs and the two rope penetrating holes are located on the same vertical plane, the lifting lugs are connected with the bottom plate, the lower ends of the two slings correspondingly penetrate through the two rope penetrating holes one to one and then are correspondingly connected with the two lifting lugs one to one, and the upper ends of the two telescopic slings are connected with the lifting block. The utility model aims to provide the hoisting mechanism for the steel-concrete composite beam in the shape of Pi, which is low in hoisting cost, and solves the problem that the hoisting cost is high in the mode of hoisting according to a lifting lug in the conventional pre-buried hoisting device.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a lifting mechanism for a U-shaped steel-concrete composite beam. Background Art

[0002] In bridge construction, U-shaped steel-concrete composite beams are prefabricated and then lifted onto bridge piers. The U-shaped steel-concrete composite beam includes a bridge deck of a concrete structure and two steel beams distributed transversely and extending longitudinally. The steel beam includes a top plate, a vertical plate, and a bottom plate. The top plate, the vertical plate, and the bottom plate are connected in an "I" shape and are located on the lower surface of the bridge deck. The top plate is fixed to the bridge deck. In order to be able to lift, the existing method is to embed a steel plate with bolts in the bridge deck, and then install a lifting lug on the bridge deck by matching nuts with the bolts, and use equipment such as a truss crane to cooperate with a sling to lift the lifting lug to achieve lifting. This lifting method has the following disadvantages: In the embedding method, in order to ensure strength, the area of the steel plate must be large, otherwise the load-bearing capacity is insufficient, resulting in a large consumption of steel. Moreover, the bolts are exposed on the bridge deck and need to be cut off, resulting in a high cost for realizing lifting. Summary of the Utility Model

[0003] The utility model aims to provide a lifting mechanism for a U-shaped steel-concrete composite beam with low lifting cost, and solves the problem of high lifting cost of the existing method of embedding and lifting with lifting lugs.

[0004] In order to achieve the above utility model purpose, the utility model adopts the following technology: A lifting mechanism for a U-shaped steel-concrete composite beam, the U-shaped steel-concrete composite beam includes a bridge deck of a concrete structure and two steel beams distributed transversely and extending longitudinally. The steel beam includes a top plate, a vertical plate, and a bottom plate. The top plate, the vertical plate, and the bottom plate are connected in an "I" shape and are located on the lower surface of the bridge deck. The top plate is fixed to the bridge deck. The feature is that it includes two lifting assemblies distributed longitudinally. The lifting assembly includes a lifting block connected to a lifting device, two lifting lugs distributed transversely, and two rope-passing holes distributed transversely on the bridge deck. The two lifting lugs and the two rope-passing holes are located in the same vertical plane. The lifting lugs are connected to the bottom plate. The lower ends of two slings pass through the two rope-passing holes one by one and are connected to the two lifting lugs one by one. The upper ends of two telescopic slings are connected to the lifting block. The specific process of lifting is as follows: Install the lifting mechanism for the U-shaped steel-concrete composite beam on the U-shaped steel-concrete composite beam to be lifted, and then connect the lifting device to the lifting block, so as to lift the U-shaped steel-concrete composite beam to a set position, and then remove the slings and the lifting block for reuse.

[0005] Preferably, the hoisting assembly further includes a lower horizontal support rod supported along the transverse bridge direction. Both ends of the lower horizontal support rod are connected to the lower ends of the steel girders, and the lower horizontal support rod is aligned with the two lifting lugs, which can prevent the steel girders from being bent and deformed due to local stress during hoisting.

[0006] Preferably, connection plates are connected to both ends of the lower horizontal support rod by bolts and nuts. The connection plates are welded to the steel girders, and are also welded to the upper surface of the bottom plate and the inner surface of the vertical plate. This can facilitate the removal of the lower horizontal support rod for reuse, while the lifting lugs and connection plates are for single-use.

[0007] Preferably, "U"-shaped brackets are fixedly connected to both ends of the lower horizontal support rod. The lower ends of the steel girders are inserted into the brackets, and the lifting lugs are fixed to the brackets. The lifting lugs and the lower horizontal support rod are distributed on both sides of the steel girders. A connection groove is formed between the lifting lugs and the brackets. The part of the bottom plate located outside the vertical plate is inserted into the connection groove, and the brackets can move longitudinally relative to the steel girders. After the U-shaped steel-concrete composite beam is hoisted in place, the slings and lifting blocks are removed, and then the lower horizontal support rod is moved longitudinally, so that the brackets, lifting lugs and lower horizontal support rod can all be removed. All components of the U-shaped steel-concrete composite beam hoisting mechanism can be reused, with low precision requirements for the relative positions of the rope-passing holes and the lifting lugs, improving the convenience during manufacturing.

[0008] Preferably, the distance between the lower surface of the lower horizontal support rod and the lower surface of the bracket is more than ten centimeters. When the U-shaped steel-concrete composite beam is not suspended, the U-shaped steel-concrete composite beam hoisting mechanism can also be conveniently removed.

[0009] Preferably, the lifting block includes a horizontal suspension rod and a number of stoppers arranged on the horizontal suspension rod. Rope-passing grooves are formed between adjacent stoppers. The connection point between the hoisting equipment and the lifting block is located in the middle of the horizontal suspension rod. The stoppers are symmetrically distributed on both sides of the connection point between the hoisting equipment and the lifting block, and the two slings are symmetrically distributed on both sides of the connection point between the hoisting equipment and the lifting block. When hoisting U-shaped steel-concrete composite beams with different bridge widths, the inclination angle of the slings can be made reasonable, reducing the extrusion force on the bridge deck and preventing damage to the bridge deck during hoisting.

[0010] Preferably, the lifting lugs are welded to the upper surface of the bottom plate and connected to the bottom plate. The connection is reliable.

[0011] Preferably, the lifting lugs are also welded to the vertical plate, which can further improve the connection reliability.

[0012] Preferably, the vertical plates of the two steel girders are located between the two lifting lugs and between the two rope-passing holes, which can improve the stability during hoisting.

[0013] Preferably, the hoisting assembly further includes an upper horizontal support rod located above the bridge deck. Fork heads are provided at both ends of the upper horizontal support rod. The two sling ropes are respectively threaded through the two fork heads at both ends of the upper horizontal support rod. When the sling ropes lift the U-shaped steel-concrete composite beam, the sling ropes abut against the fork heads. When the sling ropes lift the U-shaped steel-concrete composite beam and generate a closing force, the force acts on the upper horizontal support rod, so that the bridge deck will not be squeezed. It has a good protective function for the bridge deck.

[0014] Beneficial effects: Good reliability during hoisting, low hoisting cost, and less damage to the U-shaped steel-concrete composite beam. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the present invention;

[0016] Figure 2 is a schematic diagram of Embodiment 2 of the present invention;

[0017] Figure 3 is Figure 2 a partial enlarged schematic diagram of point A of

[0018] In the figure: the bridge deck 1 of the concrete structure, the steel beam 2, the top plate 3, the vertical plate 4, the bottom plate 5, the lifting block 6, the lifting ear 7, the rope-passing hole 8, the sling rope 9, the cross suspension rod 10, the stop block 11, the rope-passing groove 12, the hoisting equipment 13, the connection point 14 between the hoisting equipment and the lifting block, the lower horizontal support rod 15, the connecting piece 16, the bracket 17, the rolling ball 18, the part of the bottom plate outside the vertical plate 19, the lower surface 20 of the lower horizontal support rod, the lower surface 21 of the bracket, the upper horizontal support rod 22, the fork head 23. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1, see Figure 1, a U-shaped steel-concrete composite beam hoisting mechanism. The U-shaped steel-concrete composite beam includes a bridge deck 1 made of concrete structure and two steel beams 2 distributed along the transverse direction of the bridge and extending along the longitudinal direction of the bridge. The steel beam includes a top plate 3, a vertical plate 4, and a bottom plate 5. The top plate, the vertical plate, and the bottom plate are connected in an "I" shape and are located on the lower surface of the bridge deck. The top plate is fixed to the bridge deck. It includes two hoisting components distributed longitudinally. The hoisting component includes a lifting block 6 connected to the hoisting equipment, two lifting lugs 7 distributed along the transverse direction of the bridge, and two rope-passing holes 8 distributed along the transverse direction of the bridge provided on the bridge deck. The two lifting lugs and the two rope-passing holes are located in the same vertical plane. The lifting lug is connected to the bottom plate. Specifically: the lifting lug is welded to the upper surface of the bottom plate to be connected to the bottom plate, and the lifting lug is also welded to the vertical plate.

[0021] The lower ends of two lifting ropes 9 pass through the two rope-passing holes in one-to-one correspondence and are connected to the two lifting lugs in one-to-one correspondence. The upper ends of the two telescopic lifting ropes are connected to the lifting block. The lifting block includes a transverse lifting rod 10 and several retaining blocks 11 provided on the transverse lifting rod. A rope-passing groove 12 is formed between adjacent retaining blocks. The connection point 14 between the hoisting equipment 13 and the lifting block is located exactly in the middle of the transverse lifting rod. The retaining blocks are symmetrically distributed on both sides of the connection point between the hoisting equipment and the lifting block. The two lifting ropes are symmetrically distributed on both sides of the connection point between the hoisting equipment and the lifting block. The hoisting component further includes a lower transverse support rod 15 supported along the transverse direction of the bridge. The two ends of the lower transverse support rod are connected to the lower ends of the steel beams. The lower transverse support rod is aligned with the two lifting lugs. Both ends of the lower transverse support rod are connected with connecting pieces 16 through bolts and nuts. The connecting pieces are welded to the steel beams. The connecting pieces are welded to both the upper surface of the bottom plate and the inner surface of the vertical plate. The vertical plates of the two steel beams are located between the two lifting lugs. The vertical plates of the two steel beams are located between the two rope-passing holes.

[0022] The specific hoisting process is as follows: Install the U-shaped steel-concrete composite beam hoisting mechanism on the U-shaped steel-concrete composite beam to be hoisted, and then connect the hoisting equipment to the lifting block, so as to hoist the U-shaped steel-concrete composite beam to the set position, and then remove the lifting ropes and the lifting block for reuse. The rope-passing holes can be used as the interfaces of the bridge deck drain pipes in the later stage.

[0023] Embodiment 2, the difference from Embodiment 1 is:

[0024] See Figure 2 and Figure 3, brackets 17 in the shape of "U" are fixedly connected to both ends of the lower horizontal support rod, and the lower end of the steel beam, i.e., the bottom plate, is inserted into the brackets. The lifting lugs are fixed to the brackets, specifically by welding. The lifting lugs are located on the vertical plate through the rolling balls 18. The lifting lugs and the lower horizontal support rod are distributed on both sides of the steel beam. A connecting groove is formed between the lifting lugs and the brackets. The part 19 of the bottom plate located outside the vertical plate is inserted into the connecting groove, and the brackets can move longitudinally along the bridge relative to the steel beam. After the π-shaped steel-concrete composite beam is hoisted in place, the sling and the lifting block are removed, and then the lower horizontal support rod is moved longitudinally, so as to remove the brackets, the lifting lugs and the lower horizontal support rod. The distance between the lower surface 20 of the lower horizontal support rod and the lower surface 21 of the brackets is more than ten centimeters. The hoisting assembly further includes an upper horizontal support rod 22 located above the bridge deck. Fork heads 23 are provided at both ends of the upper horizontal support rod. Two slings are respectively inserted into the two fork heads at both ends of the upper horizontal support rod. When the slings lift the π-shaped steel-concrete composite beam, the slings are in contact with the fork heads.

[0025] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hoisting mechanism for a v-shaped steel-concrete composite beam, the v-shaped steel-concrete composite beam comprising a bridge deck of a concrete structure and two steel beams distributed in the transverse direction of the bridge and extending in the longitudinal direction of the bridge, the steel beam comprising a top plate, a vertical plate and a bottom plate, the top plate, the vertical plate and the bottom plate are connected together in an "I" shape and are located on the lower surface of the bridge deck, the top plate is fixed together with the bridge deck, and is characterized in that: It includes two lifting components distributed along the longitudinal direction, and the lifting components include a lifting block connected to the lifting equipment, two lifting ears distributed along the transverse direction of the bridge, and two rope passing holes arranged on the bridge deck and distributed along the transverse direction of the bridge, the two lifting ears and the two rope passing holes are located on the same vertical plane, the lifting ears are connected to the bottom plate, the lower ends of the two slings pass through the two rope passing holes one by one and are connected to the two lifting ears one by one, and the upper ends of the two telescopic slings are connected to the lifting block.

2. The hoisting mechanism for a steel-concrete composite beam according to claim 1 is characterized in that: The hoisting assembly also includes a lower transverse support rod supported along the transverse bridge direction, the two ends of the lower transverse support rod are connected to the lower end of the steel beam, and the lower transverse support rod is aligned with the two lifting ears.

3. The hoisting mechanism for a steel-concrete composite beam according to claim 2 is characterized in that: Both ends of the lower horizontal support rod are connected with connecting plates through bolts and nuts. The connecting plates are welded together with the steel beams, and the connecting plates are welded together with the upper surface of the bottom plate and the inner surface of the vertical plate.

4. The hoisting mechanism for a steel-concrete composite beam according to claim 2 is characterized in that: Both ends of the lower horizontal support rod are fixedly connected with a "U"-shaped bracket, the lower end of the steel beam is inserted into the bracket, the lifting ear is fixed together with the bracket, the lifting ear and the lower horizontal support rod are distributed on both sides of the steel beam, a connecting groove is formed between the lifting ear and the bracket, the part of the bottom plate located outside the vertical plate is inserted into the connecting groove, and the bracket can move along the longitudinal bridge direction equivalent to the steel beam.

5. The hoisting mechanism for a steel-concrete composite beam according to claim 4 is characterized in that: The lower surface of the lower horizontal support rod is higher than the lower surface of the bracket by more than ten centimeters.

6. A hoisting mechanism for a steel-concrete composite beam according to claim 1, 2, 3, 4 or 5, characterized in that: The lifting block includes a transverse lifting rod and a plurality of blocks arranged on the transverse lifting rod, and rope threading grooves are formed between adjacent blocks. The connection point between the lifting equipment and the lifting block is located in the middle of the transverse lifting rod, and the blocks are symmetrically distributed on both sides of the connection point between the lifting equipment and the lifting block. The two lifting cables are symmetrically distributed on both sides of the connection point between the lifting equipment and the lifting block.

7. A hoisting mechanism for a steel-concrete composite beam according to claim 1, 2, 3, 4 or 5, characterized in that: The hanging ear is welded to the upper surface of the bottom plate and connected with the bottom plate.

8. The hoisting mechanism for a steel-concrete composite beam according to claim 7 is characterized in that: The lifting lugs are also welded together with the vertical plates.

9. A hoisting mechanism for a steel-concrete composite beam according to claim 1, 2, 3, 4 or 5, characterized in that: The vertical plates of the two steel beams are located between the two lifting ears, and the vertical plates of the two steel beams are located between the two rope threading holes.

10. The hoisting mechanism for a steel-concrete composite beam according to claim 9, characterized in that: The lifting assembly also includes an upper cross support rod located above the bridge deck, with forks provided at both ends of the upper cross support rod. The two slings are correspondingly passed through the two forks at both ends of the upper cross support rod. When the sling lifts the arched steel-concrete composite beam, the sling is in contact with the fork.

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