Rapid stringing construction method for dismantling continuous beam

Abstract

According to the rapid rope threading construction method for dismantling the continuous beam, the steel wire rope penetrates through the top opening in the top plate, the edge opening in the flange plate and the side opening in the side web plate and then is connected to the hook of the floating crane, the steel wire rope can be prevented from moving relative to the cut section during hoisting, and the construction safety is improved; meanwhile, according to the hole forming mode, the length of the needed large-diameter steel wire rope is small, the weight of the large-diameter steel wire rope is light, the advantage that the floating crane has multiple lifting points is combined, and a crane does not need to be matched for rope penetrating in the construction process, so that on the premise that extra large mechanical equipment such as the crane is not adopted, rapid hole forming and installation of the 54 mm large-diameter lifting steel wire rope are completed, and the construction efficiency is improved. Finally, the purposes of improving the dismantling efficiency of each section of the continuous beam and reducing the construction cost are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of continuous beam dismantling construction, in particular to a rapid rope threading construction method for dismantling a continuous beam. Background Art

[0002] The use of rope saw cutting to dismantle continuous beam bridges can meet the requirements of low environmental impact. After obtaining the cut segments of the continuous beam bridge by rope saw cutting, the hoisting and transportation of the cut segments is involved. The installation efficiency of the hoisting wire rope is an important factor affecting the progress of the demolition. Since the cut segments of the continuous beam bridge are heavy, a large-diameter wire rope with a diameter of 54 mm is required for hoisting. However, since the weight of the 54 mm diameter wire rope is large, most of the existing continuous beam rope threading construction methods require the cooperation of a crane to complete the installation of the large-diameter wire rope. During the continuous beam dismantling process, first, the large-diameter wire rope needs to be threaded through the section to be cut of the continuous beam and the hook of the floating crane through the cooperation of the crane, and then the continuous beam is cut so that the section to be cut is removed from the continuous beam to obtain the cut segment. Finally, the cut segment is lifted away from the construction area by the floating crane to complete the dismantling of the section to be cut.

[0003] When a crane is used to install a large-diameter steel wire rope, the crane has a poor lifting capacity. Therefore, it is not possible to lift the cut segment as a whole during the lifting process. The steel wire rope needs to be connected to the top plate, bottom plate and side webs of the segment to be cut, and then the top plate, bottom plate and side webs of the segment to be cut are separated. Finally, the separated top plate, bottom plate and side webs are lifted away from the construction area in sequence by floating crane. This method requires additional large equipment such as cranes, which increases the construction cost of the demolition process; and the cut segment needs to be cut again during the lifting process, which reduces the construction efficiency. Summary of the invention

[0004] In order to solve the technical problems raised in the background technology, the present invention aims to provide a rapid rope threading construction method for dismantling a continuous beam, which can improve the construction efficiency of dismantling a continuous beam and reduce the construction cost.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A rapid rope threading construction method for dismantling a continuous beam comprises the following steps:

[0007] S1, providing a floating crane, wherein the floating crane has a main lifting point and an auxiliary lifting point;

[0008] S2, a plurality of groups of rope threading holes are opened on the section of the continuous beam to be cut: the section of the continuous beam to be cut includes a top plate, a bottom plate, two side webs and a partition plate, the top plate, the bottom plate and the two side webs are surrounded to form a box beam, the two sides of the top plate extend outward to form flange plates, the partition plate is fixed in the box beam to divide the space in the box beam into two box chambers arranged along the transverse bridge direction; each box chamber is provided with a plurality of groups of rope threading holes arranged at intervals along the longitudinal bridge direction, each group of rope threading holes includes a top opening opened on the top plate, an edge opening opened on the flange plates and a side opening opened on the side webs;

[0009] S3, a first steel wire rope is passed through each set of rope passing holes, wherein the first steel wire rope is a steel wire rope with a diameter of 54 mm, and the step S3 comprises the following steps:

[0010] S31, controlling the floating crane to lower the main lifting point, connecting the upper end of the first steel wire rope to the main lifting point, so that the first steel wire rope passes through the edge opening corresponding to the group of rope passing holes, so that the lower end of the first steel wire rope is located at the side opening of the corresponding side;

[0011] S32, using a hook to pass the lower end of the first steel wire rope through the corresponding side opening to be pulled into the box corresponding to the group of rope threading holes;

[0012] S33, installing a second steel wire rope as a lead at the secondary suspension point, wherein the diameter of the second steel wire rope is smaller than the diameter of the first steel wire rope, so that the lower end of the second steel wire rope is lowered through the top opening into the box corresponding to the group of rope threading holes, and manually completing the connection between the lower end of the second steel wire rope and the lower end of the first steel wire rope;

[0013] S34, lifting the auxiliary lifting point of the floating crane, and bringing the lower end of the first steel wire rope out of the top opening through the second steel wire rope, so as to lift the lower end of the first steel wire rope to above the top plate of the section to be cut;

[0014] S35, after the lower end of the first steel wire rope is lifted to above the top plate of the section to be cut, the connection between the first steel wire rope and the second steel wire rope is released, and one end of a third steel wire rope is connected to the lower end of the first steel wire rope, the diameter of the third steel wire rope is the same as that of the first steel wire rope, and the other end of the third steel wire rope is fixed to the main lifting point, thereby completing the rope threading work at the rope threading hole group;

[0015] S36, repeating steps S31-S35 until all the groups of rope threading holes have completed the rope threading;

[0016] S4, adjust the height of the main lifting point of the floating crane so that the first steel wire rope and the third steel wire rope are in a pre-tightened state, and then complete the transverse cutting of the section to be cut, so that the section to be cut is separated from the rest of the continuous beam. At this time, the section to be cut is transformed into a cut-off segment, and the floating crane bears all the weight of the cut-off segment. Finally, the floating crane is used to lift the cut-off segment away from the construction area to complete the dismantling of the section to be cut.

[0017] Furthermore, the number of the main hanging points is two, and the two main hanging points are arranged at intervals along the longitudinal bridge direction. Each of the main hanging points has two hooks that are arranged opposite to each other along the transverse bridge direction and connected to each other, and the steel wire ropes passed through the corresponding rope threading holes at the two chambers are respectively connected to the two hooks; each chamber is provided with two groups of rope threading holes arranged at intervals along the longitudinal bridge direction, and the steel wire ropes passed through the two groups of rope threading holes arranged at intervals along the longitudinal bridge direction are respectively connected to the two main hanging points.

[0018] Furthermore, the first steel wire rope and the second steel wire rope as well as the first steel wire rope and the third steel wire rope are connected via shackles.

[0019] Furthermore, in step S2, a water-grinding drill is used to open a rope threading hole on the section to be cut of the continuous beam bridge.

[0020] Furthermore, the second steel wire rope is a thin steel wire rope with a diameter of 8-12 mm.

[0021] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0022] The rapid rope threading construction method for dismantling a continuous beam of the present invention connects the steel wire rope to the hook of a floating crane after being threaded through the top opening on the top plate, the edge opening on the flange plate and the side opening on the side web plate, which can prevent the steel wire rope from moving relative to the cut section during hoisting, thereby improving the safety of construction; at the same time, the hole opening method requires a shorter length of large-diameter steel wire rope and a lighter weight of large-diameter steel wire rope, and combined with the advantage of multiple hoisting points of the floating crane, no crane is required to cooperate with rope threading during construction. Therefore, it realizes the rapid drilling and installation of 54mm large-diameter hoisting steel wire rope without using additional large-scale mechanical equipment such as a crane, thereby ultimately achieving the purpose of improving the dismantling efficiency of each section of the continuous beam and reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a drilling structure of a section to be cut according to a preferred embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a floating crane used in a preferred embodiment of the present invention;

[0025] Figure 3It is a structural schematic diagram of step S31 in the rapid rope threading construction method for dismantling a continuous beam according to a preferred embodiment of the present invention;

[0026] Figure 4-Figure 5 It is a structural schematic diagram of step S32 in the rapid rope threading construction method for dismantling a continuous beam according to a preferred embodiment of the present invention;

[0027] Figure 6 It is a structural schematic diagram of step S33 in the rapid rope threading construction method for dismantling a continuous beam according to a preferred embodiment of the present invention;

[0028] Figure 7 It is a structural schematic diagram of step S34 in the rapid rope threading construction method for dismantling a continuous beam according to a preferred embodiment of the present invention;

[0029] Figure 8 It is a structural schematic diagram of step S35 in the rapid rope threading construction method for dismantling a continuous beam according to a preferred embodiment of the present invention;

[0030] Figure 9-10 It is a structural schematic diagram of step S36 in the rapid rope threading construction method for dismantling continuous beams according to a preferred embodiment of the present invention;

[0031] Fig.11 This is a structural diagram of step S4 in the rapid rope threading construction method for dismantling continuous beams according to a preferred embodiment of the present invention; description of the main component symbols

[0032] 10. Floating crane; 11. Main lifting point; 112. Hook; 13. Auxiliary lifting point; 20. Section to be cut; 21. Top plate; 22. Bottom plate; 23. Side web plate; 24. Partition plate; 25. Flange plate; 26. Box chamber; 30. Rope threading hole; 31. Top opening; 32. Edge opening; 33. Side opening; 40. First wire rope; 50. Second wire rope; 60. Third wire rope; 70. Hull; 80. Hook; 90. Shackle; 200. Wire rope. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Please also see Figures 1 to 11 A preferred embodiment of the present invention provides a method for rapid rope threading in continuous beam dismantling, comprising the following steps:

[0037] S1, provide a floating crane 10, the floating crane 10 has a main hanging point 11 and an auxiliary hanging point 13. In this embodiment, the number of the main hanging points 11 is two, the two main hanging points 11 are arranged at intervals along the longitudinal bridge direction, and each main hanging point 11 has two hooks 112 arranged opposite to each other along the transverse bridge direction and connected to each other. The structure of the floating crane 10 belongs to the prior art, and is not described here for the sake of space.

[0038] S2, a plurality of groups of rope threading holes 30 are opened on the to-be-cut section 20 of the continuous beam.

[0039] The section 20 to be cut of the continuous beam includes a top plate 21, a bottom plate 22, two side webs 23 and a partition 24. The top plate 21, the bottom plate 22 and the two side webs 23 are arranged to form a box beam. Specifically, the top plate 21 and the bottom plate 22 are arranged opposite to each other in the vertical direction, the two side webs 23 are arranged opposite to each other in the transverse direction, and the side webs 23 connect the top plate 21 and the bottom plate 22. Both sides of the top plate 21 extend outward to form flange plates 25. The partition 24 is fixed in the box beam to divide the space in the box beam into two box chambers 26 arranged in the transverse direction. The box beam structure of the continuous beam belongs to the prior art and will not be described here for the sake of space saving.

[0040] In this embodiment, each box chamber 26 is provided with a plurality of groups of rope holes 30 arranged at intervals along the longitudinal bridge direction. The rope holes 30 serve as the hanging points of the section 20 to be cut, which facilitates the insertion of the wire rope. In this embodiment, each box chamber 26 is provided with two groups of rope holes 30 arranged at intervals along the longitudinal bridge direction. Each group of rope holes 30 includes a top opening 31 opened on the top plate 21 and connected to the corresponding side box chamber 26, an edge opening 32 opened on the flange plate 25, and a side opening 33 opened on the side web plate 23 and connected to the corresponding side box chamber 26. In this embodiment, a water-grinding drill is used to open the rope holes 30 on the section 20 to be cut of the continuous beam.

[0041] S3, inserting a steel wire rope for hoisting at each set of rope insertion holes 30, which includes the following steps:

[0042] S31, control the floating crane 10 to lower the main suspension point 11, connect the upper end of the first steel wire rope 40 to the hook 112 of the main suspension point 11, so that the first steel wire rope 40 passes through the edge opening 32 corresponding to the group of rope passing holes 30, so that the lower end of the first steel wire rope 40 is located at the side opening 33 of the corresponding side. The first steel wire rope 40 is a large diameter steel wire rope with a diameter of 54 mm.

[0043] S32, using the hook 80 to pass the lower end of the first steel wire rope 40 through the corresponding side opening 33 to be pulled into the box chamber 26 corresponding to the group of rope threading holes 30. The hook 80 of this embodiment is formed by bending a steel bar.

[0044] S33, install the second steel wire rope 50 as a lead at the auxiliary suspension point 13. The diameter of the second steel wire rope 50 is smaller than that of the first steel wire rope 40. Specifically, the second steel wire rope 50 is a thin steel wire rope with a diameter of 8-12 mm. The thin steel wire rope within this diameter range can bear the weight of the large diameter steel wire rope, and its weight is light, which is convenient for workers to operate alone. The lower end of the second steel wire rope 50 is lowered through the top opening 31 to the box chamber 26 corresponding to the group of rope holes 30, and the lower end of the second steel wire rope 50 is manually connected to the lower end of the first steel wire rope 40; specifically, the first steel wire rope 40 and the second steel wire rope 50 are connected by a shackle 90.

[0045] S34, lift the auxiliary lifting point 13 of the floating crane 10, and bring the lower end of the first steel wire rope 40 out from the top opening 31 through the second steel wire rope 50, so that the lower end of the first steel wire rope 40 is lifted to above the top plate 21 of the section to be cut 20.

[0046] S35, after the lower end of the first steel wire rope 40 is lifted to above the top plate 21 of the section to be cut 20, the connection between the first steel wire rope 40 and the second steel wire rope 50 is released, and one end of the third steel wire rope 60 is connected to the lower end of the first steel wire rope 40. Specifically, the first steel wire rope 40 and the third steel wire rope 60 are connected by a shackle 90; the diameter of the third steel wire rope 60 is the same as that of the first steel wire rope 40, and the other end of the third steel wire rope 60 is fixed to the hook 112 of the main lifting point 11 to complete the rope threading work at the rope threading holes 30 of this group.

[0047] S36, repeat steps S31-S35 until all the groups of rope threading holes 30 are threaded. In this embodiment, the steel wire ropes threaded through the two groups of rope threading holes 30 corresponding to each chamber 26 are respectively connected to the two main suspension points 11, and the steel wire ropes threaded through the two groups of rope threading holes 30 corresponding to the two chambers 26 are respectively connected to the hooks 112 on both sides of the main suspension point 11.

[0048] S4, adjust the height of the main lifting point 11 of the floating crane 10 so that the first steel wire rope 40 and the third steel wire rope 60 are in a pre-tightened state, and then complete the transverse cutting of the section to be cut 20, so that the section to be cut 20 is separated from the rest of the continuous beam. At this time, the section to be cut 20 is transformed into a cut-off segment, and the floating crane 10 bears all the weight of the cut-off segment. Finally, the floating crane 10 is used to lift the cut-off segment away from the construction area, and the dismantling of the section to be cut 20 is completed.

[0049] The rapid rope threading construction method for dismantling a continuous beam of the present invention connects the steel wire rope 200 to the main lifting point 11 of the floating crane 10 after passing the steel wire rope 200 through the top opening 31 on the top plate 21, the edge opening 32 on the flange plate 25 and the side opening 33 on the side web plate 23. During hoisting, the steel wire rope 200 can be prevented from moving relative to the cut segment, thereby improving the safety of construction. At the same time, the hole opening method requires a shorter length of large-diameter steel wire rope, and the weight of the large-diameter steel wire rope used is also lighter. Combined with the advantage of multiple hoisting points of the floating crane, no crane is required to cooperate with rope threading during construction. Therefore, it realizes the rapid drilling and installation of the 54mm large-diameter hoisting steel wire rope without using additional large-scale mechanical equipment such as a crane, thereby ultimately achieving the purpose of improving the dismantling efficiency of each segment of the continuous beam and reducing the construction cost.

[0050] 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 rapid rope threading construction method for dismantling a continuous beam, characterized in that: The following steps are involved: S1, providing a floating crane, wherein the floating crane has a main lifting point and an auxiliary lifting point; S2, a plurality of groups of rope threading holes are opened on the section of the continuous beam to be cut: the section of the continuous beam to be cut includes a top plate, a bottom plate, two side webs and a partition plate, the top plate, the bottom plate and the two side webs are surrounded to form a box beam, the two sides of the top plate extend outward to form flange plates, the partition plate is fixed in the box beam to divide the space in the box beam into two box chambers arranged along the transverse bridge direction; each box chamber is provided with a plurality of groups of rope threading holes arranged at intervals along the longitudinal bridge direction, each group of rope threading holes includes a top opening opened on the top plate, an edge opening opened on the flange plates and a side opening opened on the side webs; S3, threading a steel wire rope for hoisting at each set of rope threading holes, step S3 comprises the following steps: S31, controlling the floating crane to lower the main lifting point, connecting the upper end of the first steel wire rope to the main lifting point, so that the first steel wire rope passes through the edge opening corresponding to the group of rope passing holes, so that the lower end of the first steel wire rope is located at the side opening of the corresponding side; S32, using a hook to pass the lower end of the first steel wire rope through the corresponding side opening to be pulled into the box corresponding to the group of rope threading holes; S33, installing a second steel wire rope as a lead at the secondary suspension point, wherein the diameter of the second steel wire rope is smaller than the diameter of the first steel wire rope, so that the lower end of the second steel wire rope is lowered through the top opening into the box corresponding to the group of rope threading holes, and manually completing the connection between the lower end of the second steel wire rope and the lower end of the first steel wire rope; S34, lifting the auxiliary lifting point of the floating crane, and bringing the lower end of the first steel wire rope out of the top opening through the second steel wire rope, so as to lift the lower end of the first steel wire rope to above the top plate of the section to be cut; S35, after the lower end of the first steel wire rope is lifted to above the top plate of the section to be cut, the connection between the first steel wire rope and the second steel wire rope is released, and one end of a third steel wire rope is connected to the lower end of the first steel wire rope, the diameter of the third steel wire rope is the same as that of the first steel wire rope, and the other end of the third steel wire rope is fixed to the main lifting point, thereby completing the rope threading work at the rope threading hole group; S36, repeating steps S31-S35 until all the groups of rope threading holes have completed the rope threading; S4, adjust the height of the main lifting point of the floating crane so that the first steel wire rope and the third steel wire rope are in a pre-tightened state, and then complete the transverse cutting of the section to be cut, so that the section to be cut is separated from the rest of the continuous beam. At this time, the section to be cut is transformed into a cut-off segment, and the floating crane bears all the weight of the cut-off segment. Finally, the floating crane is used to lift the cut-off segment away from the construction area.

2. The rapid rope threading construction method for dismantling a continuous beam as claimed in claim 1 is characterized in that: There are two main hanging points, which are spaced apart in the longitudinal direction of the bridge. Each main hanging point has two hooks that are oppositely arranged and connected to each other in the transverse direction of the bridge. The steel wire ropes passed through the corresponding rope passing holes in the two chambers are respectively connected to the two hooks; each chamber is provided with two groups of rope passing holes spaced apart in the longitudinal direction of the bridge, and the steel wire ropes passed through the two groups of rope passing holes spaced apart in the longitudinal direction of the bridge are respectively connected to the two main hanging points.

3. The rapid rope threading construction method for dismantling a continuous beam as claimed in claim 1 is characterized in that: The first steel wire rope and the second steel wire rope as well as the first steel wire rope and the third steel wire rope are connected via shackles.

4. The rapid rope threading construction method for dismantling a continuous beam as claimed in claim 1 is characterized in that: In step S2, a water-grinding drill is used to open a rope threading hole on the to-be-cut section of the continuous beam bridge.

5. The rapid rope threading construction method for dismantling a continuous beam as claimed in claim 1 is characterized in that: The second steel wire rope is a thin steel wire rope with a diameter of 8-12 mm.

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