Steel wire rope binding structure for dismantling concrete box girder section of old bridge

Abstract

The invention provides a steel wire rope binding structure of an old bridge demolition concrete box girder segment, which comprises a concrete box girder segment and a steel wire rope, the concrete box girder segment is enclosed by a top plate, a bottom plate and webs on two sides, and two sides of the top plate extend outwards to form flange plates; the two opposite sides of each concrete box girder segment are each provided with a plurality of sets of hoisting holes arranged at intervals in the longitudinal bridge direction. Each set of hoisting holes comprises a top opening formed in the top plate, an edge opening formed in the flange plate and a side opening formed in the side web. A steel wire rope for hoisting penetrates through each group of hoisting holes, the steel wire rope sequentially penetrates through the top opening, the edge opening and the side opening of the corresponding group of hoisting holes, and the two opposite ends of the steel wire rope are both used for being connected with a lifting hook of hoisting equipment. The diameter of the steel wire rope for hoisting can be reduced under the condition that the hoisting weight exceeds 200t, the steel wire rope commonly used in the market can be used, meanwhile, the safety risk in the hoisting construction process is reduced, and the safety in the hoisting construction process is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of old bridge demolition construction, in particular to a steel wire rope binding structure for demolishing concrete box beam segments of old bridges. Background Art

[0002] In the prior art, the hoisting of structures such as concrete box beam segments generally adopts the form of double lifting points and two steel wire ropes. Figure 1-2 As shown, the lifting weight of a small concrete box girder segment 10 is generally about 120t, with a safety factor of 6 times, and the diameter of the steel wire rope 40 does not exceed Ф60mm. However, when the lifting weight of the structure exceeds 200t, such as the lifting and removal of the suspended cast-in-place box girder segment of an old bridge, this traditional bottom lifting method is used. Figure 3-4 As shown, the diameter of the wire rope is at least not less than 84mm. Thick-diameter wire ropes are not common on the market and need to be customized separately, which has high cost. At the same time, thick-diameter wire ropes are hard, and a large arc is required at the bottom of the beam to make a turn and transition. It cannot be close to the beam and tightened, and is easy to slide. The steel foot guard of the wire rope protection device at the bottom of the beam is not easy to install and position, and the wire rope is easy to be cut during hoisting. At the same time, due to the short segment length, generally 3m to 4m, which is different from the general length of small prefabricated box girders of 30m and 40m, the hoisting process is prone to rotation around the longitudinal axis and front and back warping, which creates a greater safety risk. Summary of the invention

[0003] In view of the high cost, great safety risk and poor practicality of the traditional hoisting wire rope bundling method for hoisting large-tonnage structures (hoisting weight exceeding 200t), which requires the use of wire ropes with a diameter of more than 80mm, a simple design can reduce the diameter of the hoisting wire rope when the hoisting weight exceeds 200t, and commonly used wire ropes on the market can be used. At the same time, the safety risks of the hoisting construction process are reduced, ensuring the safety of the hoisting construction process.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A wire rope binding structure for dismantling concrete box girder segments of old bridges, comprising a concrete box girder segment and a steel wire rope, wherein the concrete box girder segment is surrounded by a top plate, a bottom plate and two side webs, and the two sides of the top plate extend outward to form flange plates; a plurality of groups of lifting holes arranged at intervals along the longitudinal direction of the bridge are provided on opposite sides of the concrete box girder segment, and each group of lifting holes comprises a top opening provided on the top plate, an edge opening provided on the flange plates and a side opening provided on the side web plates; a steel wire rope for lifting is passed through each group of lifting holes, and the steel wire rope is passed through the top opening, the edge opening and the side opening of the corresponding group of the lifting holes in sequence, and the opposite ends of the steel wire rope are used to be connected to a hook of a lifting device.

[0006] Furthermore, two to four groups of lifting holes are respectively arranged at intervals along the longitudinal direction of the bridge on opposite sides of the concrete box girder segment.

[0007] Furthermore, the steel wire rope is a single steel wire rope.

[0008] Furthermore, the single steel wire rope is doubled and then passed through the corresponding lifting hole.

[0009] The present invention further provides a steel wire rope binding structure for dismantling concrete box girder segments of old bridges, comprising a concrete box girder segment and a steel wire rope, wherein the concrete box girder segment is surrounded by a top plate, a bottom plate and two side webs, and the two sides of the top plate extend outward to form flange plates; a plurality of groups of lifting holes arranged at intervals along the longitudinal direction of the bridge are provided on the opposite sides of the concrete box girder segment, and each group of lifting holes comprises a top opening provided on the top plate and a side opening provided on the side web plates; a steel wire rope for lifting is passed through each group of lifting holes, one end of the steel wire rope is used to be connected to a hook of a lifting device, and the other end of the steel wire rope passes through the top opening and the side opening in sequence, is wrapped around the outer side surface of the flange plate, and is then connected to the hook of the lifting device.

[0010] Furthermore, two to four groups of lifting holes are respectively arranged at intervals along the longitudinal direction of the bridge on opposite sides of the concrete box girder segment.

[0011] Furthermore, the steel wire rope is a single steel wire rope.

[0012] Furthermore, the single steel wire rope is doubled and then passed through the corresponding lifting hole.

[0013] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0014] The steel wire rope binding structure for dismantling concrete box girder segments of old bridges of the present invention can avoid sliding of steel wire ropes by drilling holes in the webs of the dismantled concrete box girder segments of old bridges, changing the traditional bottom-hanging method to web-hanging method, and at the same time, the web-hanging holes added to the hoisted concrete box girder segments increase the number of force-bearing limbs of the hoisting steel wire ropes, thereby achieving the purpose of reducing the diameter of the steel wire ropes and increasing the safety of the hoisting process, reducing the hoisting cost, and making the hoisting construction convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the hoisting state of a small-sized concrete box girder segment in the prior art;

[0016] Figure 2 for Figure 1 The main view;

[0017] Figure 3It is a schematic diagram of the hoisting state of the cast-in-place box girder section of the old bridge in the prior art;

[0018] Figure 4 for Figure 3 The main view;

[0019] Figure 5 A structural schematic diagram of a concrete box girder segment of a steel wire rope binding structure for dismantling a concrete box girder segment of an old bridge according to a preferred embodiment of the present invention;

[0020] Figure 6 It is a structural schematic diagram of a steel wire rope binding structure for dismantling a concrete box girder segment of an old bridge according to a preferred embodiment of the present invention;

[0021] Figure 7 for Figure 6 The main view;

[0022] Figure 8 for Figure 6 The schematic diagram of the structure when the wire rope is passed through the lifting holes in a double form is shown;

[0023] Fig. 9 A schematic structural diagram of a concrete box girder segment of a steel wire rope binding structure for dismantling a concrete box girder segment of an old bridge according to another embodiment of the present invention;

[0024] Fig.10 It is a structural schematic diagram of a steel wire rope binding structure for dismantling a concrete box girder segment of an old bridge according to another embodiment of the present invention;

[0025] Main component symbols

[0026] 10. Concrete box girder segment; 11. Top plate; 12. Bottom plate; 13. Side web plate; 14. Partition plate; 15. Flange plate; 16. Box chamber; 30. Lifting hole; 31. Top opening; 32. Edge opening; 33. Side opening; 40. Wire rope. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] Please also see Figures 5 to 7 A preferred embodiment of the present invention provides a steel wire rope binding structure for dismantling a concrete box girder segment of an old bridge, comprising a concrete box girder segment 10 and a steel wire rope 40 passing through the concrete box girder segment 10 and used for hoisting the concrete box girder segment 10.

[0031] The concrete box girder segment 10 is a hollow box girder structure formed by a top plate 11, a bottom plate 12 and two side webs 13. Specifically, the top plate 11 and the bottom plate 12 are arranged opposite to each other, and the two side webs 13 are arranged opposite to each other and connect the top plate 11 and the bottom plate 12. Both sides of the top plate 11 extend outward to form flange plates 15. A partition 14 is fixed in the hollow cavity of the concrete box girder segment 10. In this embodiment, the partition 14 divides the hollow cavity of the concrete box girder segment 10 into two box chambers 16 arranged along the transverse bridge direction. The structure of the concrete box girder segment 10 belongs to the prior art and will not be described here for the sake of space saving. A plurality of groups of hoisting holes 30 arranged at intervals along the longitudinal bridge direction are correspondingly provided on the opposite sides of the concrete box girder segment 10, and each group of hoisting holes 30 includes a top opening 31 opened on the top plate 11, an edge opening 32 opened on the flange plate 15 and a side opening 33 opened on the side web 13. The hoisting holes 30 serve as the hoisting points of the concrete box girder segment 10, and facilitate the insertion of the steel wire rope 40. In this embodiment, the hoisting holes 30 are drilled in the top plate 11, the web plate and the flange plate 15 of the box girder respectively by a water-grinding drill.

[0032] A steel wire rope 40 for lifting is passed through each group of lifting holes 30. The steel wire rope 40 passes through the top opening 31, the edge opening 32 and the side opening 33 of the corresponding group of lifting holes 30 in sequence. The opposite ends of the steel wire rope 40 are used to connect with the hook of a lifting device (not shown). The lifting device can be a lifting device such as a truck crane, a floating crane, a gantry crane, etc. in the prior art. Specifically, 2-4 groups of lifting holes 30 arranged at intervals along the longitudinal bridge direction are respectively provided on the opposite sides of the concrete box girder segment 10. In this embodiment, when 4 groups of lifting holes 30 arranged at intervals along the longitudinal bridge direction are respectively provided on the opposite sides of the concrete box girder segment 10, a single steel wire rope 40 can be used for lifting. Please refer to Figure 8 When two groups of hoisting holes 30 arranged at intervals along the longitudinal direction of the bridge are respectively provided on opposite sides of the concrete box girder segment 10, a single steel wire rope 40 can be used for hoisting after being doubled and then passed through the corresponding hoisting holes 30.

[0033] Please also see Figures 9 and 10 Another embodiment of the present invention provides a steel wire rope binding structure for dismantling a concrete box girder segment of an old bridge, including a concrete box girder segment 10 and a steel wire rope 40 passing through the concrete box girder segment 10 and used for hoisting the concrete box girder segment 10.

[0034] The concrete box girder segment 10 is a hollow box girder structure surrounded by a top plate 11, a bottom plate 12 and two side webs 13. Specifically, the top plate 11 and the bottom plate 12 are arranged opposite to each other, and the two side webs 13 are arranged opposite to each other and connect the top plate 11 and the bottom plate 12. Both sides of the top plate 11 extend outward to form flange plates 15. A partition 14 is fixed in the hollow cavity of the concrete box girder segment 10. In this embodiment, the partition 14 divides the hollow cavity of the concrete box girder segment 10 into two box chambers 16 arranged along the transverse bridge direction. The structure of the concrete box girder segment 10 belongs to the prior art and will not be described here for the sake of space saving. A plurality of groups of hoisting holes 30 arranged at intervals along the longitudinal bridge direction are correspondingly provided on the opposite sides of the concrete box girder segment 10, and each group of hoisting holes 30 includes a top opening 31 opened on the top plate 11 and a side opening 33 opened on the side web 13. The hoisting holes 30 serve as the hoisting points of the concrete box girder segment 10, and facilitate the insertion of the steel wire rope 40. In this embodiment, the hoisting holes 30 are drilled in the top plate 11 and the web of the box girder respectively by a water-grinding drill.

[0035] A steel wire rope 40 for hoisting is passed through each group of hoisting holes 30, one end of the steel wire rope 40 is used to connect with a hook of a hoisting device, and the other end of the steel wire rope 40 passes through the top opening 31 and the side opening 33 in sequence and is wound around the outer side of the flange plate 15 and then connected with the hook of the hoisting device. Specifically, in this embodiment, when four groups of hoisting holes 30 arranged at intervals along the longitudinal bridge direction are respectively provided on opposite sides of the concrete box girder segment 10, a single steel wire rope 40 can be used for hoisting. When two groups of hoisting holes 30 arranged at intervals along the longitudinal bridge direction are respectively provided on opposite sides of the concrete box girder segment 10, a single steel wire rope 40 can be used for hoisting after being doubled and then passed through the corresponding hoisting holes 30. In this embodiment, the portion of the steel wire rope 40 in contact with the outer side surface of the flange plate 15 and the inner wall of the lifting hole 30 is also wrapped with flexible parts such as cloth strips and rubber belts to prevent the sharp corners of the outer side surface of the flange plate 15 of the beam body or the lifting hole 30 from cutting the steel wire rope and causing the steel wire rope to break.

[0036] Traditional bottom cranes need to use steel wire ropes with a diameter of more than 80mm for lifting structures with a lifting weight of more than 200t. Thick-diameter steel wire ropes are hard, not commonly used, and easily consumable, with high cost of use. During the bundling process, due to their high hardness, they cannot be tightly attached to the structure and are prone to sliding. At the same time, the steel foot guard of the wire rope protection device at the bottom of the beam is not easy to install and position, and the wire rope is easily damaged during lifting. There is a great safety risk, the weight is heavy, the punching efficiency is low during the construction process, and large machinery is required for assistance. The wire rope binding structure for dismantling the concrete box girder segment of the old bridge provided by the embodiment of the present invention adopts the method of hanging the web plate, and the wire rope 40 is perforated to hang the web plate of the beam body, so that the beam body can be completely locked while ensuring that the lengths of the two horizontal wire ropes 40 are the same, so as to avoid the sliding of the hoisting wire rope 40, the clockwise and counterclockwise rotation of the beam body along the longitudinal axis, and the front and back upturning, thereby greatly increasing the safety of the hoisting; at the same time, the web plate hoisting hole 30 added to the hoisted concrete box girder segment 10 increases the number of force-bearing limbs of the hoisting wire rope 40, and the diameter of the hoisting wire rope 40 is reduced, and the commonly used wire rope with a diameter of 54mm on the market can be used, the hardness of the wire rope 40 is reduced, the flexibility is increased, and the single weight of the wire rope 40 is reduced, which is convenient for manual rope threading operation. In addition, since the diameter of the wire rope 40 is reduced, a single wire rope 40 can be used to punch holes for hoisting in a double manner. At this time, the number of groups of the hoisting holes 30 can be further reduced, which is convenient for construction personnel to flexibly apply according to the construction situation.

[0037] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A wire rope binding structure for dismantling concrete box girder segments of an old bridge, characterized in that: It comprises a concrete box girder segment and a steel wire rope, wherein the concrete box girder segment is surrounded by a top plate, a bottom plate and two side web plates, and the two sides of the top plate extend outward to form flange plates; the opposite sides of the concrete box girder segment are provided with a plurality of groups of lifting holes arranged at intervals along the longitudinal bridge direction, and each group of lifting holes comprises a top opening opened on the top plate, an edge opening opened on the flange plate and a side opening opened on the side web plate; a steel wire rope for lifting is passed through each group of lifting holes, and the steel wire rope is passed through the top opening, the edge opening and the side opening of the corresponding group of the lifting holes in sequence, and the opposite ends of the steel wire rope are used to be connected to a hook of a lifting device.

2. The steel wire rope binding structure for dismantling concrete box girder segments of an old bridge as claimed in claim 1, characterized in that: Two to four groups of hoisting holes are arranged at intervals along the longitudinal direction of the bridge respectively on opposite sides of the concrete box beam segment.

3. The steel wire rope binding structure for dismantling concrete box girder segments of an old bridge as claimed in claim 2, characterized in that: The steel wire rope is a single steel wire rope.

4. The steel wire rope binding structure for dismantling concrete box girder segments of an old bridge as claimed in claim 3, characterized in that: The single steel wire rope is doubled and then passed through the corresponding lifting hole.

5. A wire rope binding structure for dismantling concrete box girder segments of an old bridge, characterized in that: It comprises a concrete box girder segment and a steel wire rope, wherein the concrete box girder segment is surrounded by a top plate, a bottom plate and two side web plates, and the two sides of the top plate extend outward to form flange plates; the opposite sides of the concrete box girder segment are provided with a plurality of groups of lifting holes arranged at intervals along the longitudinal bridge direction, and each group of lifting holes comprises a top opening opened on the top plate and a side opening opened on the side web plates; a steel wire rope for lifting is passed through each group of lifting holes, one end of the steel wire rope is used to be connected to a hook of a lifting device, and the other end of the steel wire rope passes through the top opening and the side opening in sequence, is wound around the outer side surface of the flange plate, and then is connected to the hook of the lifting device.

6. The steel wire rope binding structure for dismantling concrete box girder segments of an old bridge as claimed in claim 5, characterized in that: Two to four groups of hoisting holes are arranged at intervals along the longitudinal direction of the bridge respectively on opposite sides of the concrete box beam segment.

7. The steel wire rope binding structure for dismantling concrete box girder segments of an old bridge as claimed in claim 6, characterized in that: The steel wire rope is a single steel wire rope.

8. The steel wire rope binding structure for dismantling concrete box girder segments of an old bridge as claimed in claim 7, characterized in that: The single steel wire rope is doubled and then passed through the corresponding lifting hole.

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