A device and method for integral removal of an ultra-wide bailey beam support

Abstract

This invention relates to the field of bridge engineering technology, specifically to a device and operating method for the overall dismantling of an ultra-wide Bailey bridge support. The device includes a main beam, as well as a disc-lock scaffold, Bailey bridges, I-beams, sandboxes, prefabricated steel pipe columns, winches, and wire ropes. The winch is positioned on the top surface of the main beam. The prefabricated steel pipe columns, sandboxes, I-beams, Bailey bridges, and disc-lock scaffold are arranged sequentially from bottom to top to support the main beam. One end of the wire rope passes through a pre-drilled hole in the main beam and connects to the winch on the top surface of the main beam; the other end of the wire rope is connected to the I-beam. The winches are arranged both laterally and longitudinally along the main beam. The winches support the I-beams, Bailey bridges, and disc-lock scaffold via the wire ropes. This invention features a simple structure, convenient installation and dismantling, requires minimal auxiliary tools, effectively solves the dismantling problem of ultra-wide Bailey bridges, significantly reduces dismantling time, and improves construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and in particular to a device and operating method for the overall unloading of an ultra-wide Bailey bridge support. Background Technology

[0002] In bridge construction, when land-based construction is feasible, the full-span scaffolding method is one of the most commonly used construction methods for cast-in-place bridge main beams. The advantages of the full-span scaffolding method are convenient assembly of steel pipe supports and the elimination of the need for large hoisting equipment. The disadvantages are the large consumption of steel pipe supports, the time-consuming and labor-intensive process of dismantling each support individually, and the long construction period, making it unsuitable for high-pier bridges. In contrast, Bailey bridge supports, due to their rapid erection and high mobility, are frequently used as an improved full-span scaffolding method in the construction of cast-in-place high-pier bridge main beams. A Bailey bridge is a steel truss assembled from Bailey beams, used in conjunction with steel pipe columns to form the Bailey bridge support system. Support dismantling is a crucial step in the construction of the bridge main beam. Existing Bailey bridge support dismantling methods involve dismantling the supports gradually from top to bottom. The shortcomings of this method include: the Bailey bridge beam needs to be dismantled piece by piece; the dismantling operation takes a long time, affecting the construction period; and the high labor intensity for workers at height poses safety hazards. Currently, some patents involve the overall dismantling of Bailey bridge supports, but the structures are complex and difficult to apply to the overall dismantling of Bailey bridge supports for ultra-high piers and ultra-wide main beams. Summary of the Invention

[0003] The purpose of this invention is to provide a device and operating method for the overall dismantling of ultra-wide Bailey bridge supports in order to solve the above-mentioned problems. This solves the problem that current methods involving the overall dismantling of Bailey bridge supports are complex in structure and difficult to apply to the overall dismantling of Bailey bridge supports for ultra-high bridge piers and ultra-wide main beams.

[0004] The present invention achieves the above-mentioned objectives through the following technical solution: a device for the overall unloading of an ultra-wide Bailey beam support, comprising a main beam, and further comprising a disc-lock scaffold, Bailey beams, I-beams, sandboxes, prefabricated steel pipe columns, winches, and wire ropes. The winch is arranged on the top surface of the main beam. The prefabricated steel pipe columns, sandboxes, I-beams, Bailey beams, and disc-lock scaffold are arranged sequentially from bottom to top to support the main beam. One end of the wire rope passes through a pre-reserved hole in the main beam and connects to the winch on the top surface of the main beam. The other end of the wire rope is connected to the I-beam. The winches are arranged both laterally and longitudinally along the main beam. The winches support the I-beams, Bailey beams, and disc-lock scaffold through the wire ropes.

[0005] The sand box is filled with gravel and is placed between the I-beam and the prefabricated steel pipe column. The sand box includes a sand-containing chamber and a supporting column inside the sand-containing chamber. The bottom of the sand-containing chamber is provided with a connecting cavity, and bolts run through the sand-containing chamber from the outside to the inside. When the bolts are removed, the gravel in the sand-containing chamber can flow out from the bolt holes on the sand-containing chamber.

[0006] Preferably, the bolt includes a cap, a threaded cylinder, and a rod. The cap is fixedly connected to the threaded cylinder, the threaded cylinder is threadedly connected to the bolt hole on the sand box chamber, the rod passes through the threaded cylinder and is fixed to the cap, and the other end of the rod is inserted into the sand box chamber.

[0007] Preferably, the bolt cover includes a fixed bolt cover and a movable bolt cover. The fixed bolt cover is fixedly connected to the threaded cylinder, while the movable bolt cover is movably connected to the other side of the fixed bolt cover. A sand guide cylinder is connected to the end of the threaded cylinder away from the fixed bolt cover. The sand guide cylinder has a hollow internal structure and is adapted to the bolt hole on the sand box. The cavity inside the threaded cylinder accommodates the insertion rod, and the sand guide cylinder is also provided with a sand outlet hole.

[0008] Preferably, the fixed cap has a tapered hole on the side facing the movable cap, and the movable cap has a tapered boss that matches the tapered hole on the side facing the fixed cap, with the tapered boss and the tapered hole being splined together.

[0009] Preferably, a descending limiting component is installed at the bottom of the sand box containing sand chamber. The descending limiting component includes two discs distributed vertically. The lower disc is fixed at the bottom of the sand box containing sand chamber. The two discs are connected by a support shaft. A section of the insertion rod inserted into the sand box containing sand chamber is located between the two discs.

[0010] Preferably, the upper and lower ends of the support shaft are respectively connected to the eccentric positions of the two disks, and both the upper and lower ends of the support shaft are connected to the two disks through bearings. Stirring blades are connected to the upper and lower parts of the outer wall of the support shaft.

[0011] The outer wall of the support shaft is fitted with a gear, and the outside of the section of the insert rod inserted into the sand chamber of the sand box is fixed with a rack, which meshes with the gear.

[0012] Preferably, the stirring blade has a wavy structure.

[0013] Preferably, the bearings at the upper and lower ends of the support shaft are located inside the two disks respectively.

[0014] The beneficial effects of this invention are:

[0015] 1. This invention uses a sand box as an intermediate transition connector and controls the lifting by feeding and discharging sand into the sand box. After the sand box is discharged, a discontinuity area appears in the middle of the unloading device. The discontinuity area is used for dismantling, eliminating the need for gradual dismantling from top to bottom. This makes the entire unloading device simple in structure, easy to install and dismantle, and requires few auxiliary tools. It can effectively solve the problem of dismantling ultra-wide Bailey beams, greatly reduce dismantling time, and improve construction efficiency.

[0016] 2. This invention controls sand release by setting a bolt assembly in the sand box. The bolt consists of a movable cap, a fixed cap, a threaded cylinder, a sand guide cylinder, and a rod. This allows the bolt to not only release sand, but also, after being pulled out, to cover the threaded groove of the bolt hole, preventing sand from clogging the threaded groove and preventing the bolt from being fixed in the bolt hole later. Furthermore, after being pulled out, the bolt can continuously extend and retract inward and outward while preventing sand from clogging the threaded groove of the bolt hole, thus drawing out the sand inside, accelerating the flow of sand, and allowing the sand to be quickly discharged from the bolt hole, improving overall efficiency.

[0017] 3. The present invention uses a descending limit component to limit the downward movement of the I-beam in the sand box, preventing it from pressing down on the bolt insertion part. At the same time, the bolt assembly continuously extends and retracts, driving the support shaft in the descending limit component to rotate, causing the stirring blade to agitate the sand and gravel, promoting the flow of the sand and gravel, and preventing the sand and gravel from being pressed together by the pressure from above, which would prevent the sand and gravel from being discharged. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the main beam support;

[0019] Figure 2 This is a schematic diagram of the design of the present invention;

[0020] Figure 3 This is a schematic diagram of the sand box structure;

[0021] Figure 4 This is a schematic diagram illustrating the disassembly of the sand box according to the present invention;

[0022] Figure 5 This is a schematic diagram of the disassembly of the assembled steel pipe column of the present invention;

[0023] Figure 6 This is a schematic diagram showing the disassembly of the prefabricated steel pipe column of the present invention.

[0024] Figure 7 This is a schematic diagram of the overall unloading process of the present invention;

[0025] Figure 8 This is a schematic diagram of the installation of the present invention in the longitudinal direction of a cable-stayed bridge;

[0026] Figure 9 This is a schematic diagram of the installation of the present invention in the longitudinal direction of a box girder bridge;

[0027] Figure 10 This is a top view of the sand box structure in this invention;

[0028] Figure 11 This is a schematic diagram of the bolt structure in this invention;

[0029] Figure 12 This is a schematic diagram of the main view of the bolt structure in this invention;

[0030] Figure 13 This is a schematic diagram of the cross-sectional structure of the sand box in this invention;

[0031] Figure 14 This is a schematic diagram of the descending limit component structure in this invention.

[0032] In the diagram: 1. Main beam; 2. Disc-lock scaffolding; 3. Bailey bridge beam; 4. I-beam; 5. Sand box; 6. Prefabricated steel pipe column; 7. Winch; 8. Wire rope; 51. Sand box chamber; 52. Bolt; 53. Connecting chamber; 54. Lowering limit assembly; 55. Bearing column; 521. Fixed bolt cover; 522. Threaded cylinder; 523. Sand guide cylinder; 524. Insert rod; 525. Movable bolt cover; 526. Sand outlet hole; 527. Rack; 541. Disc; 542. Support shaft; 543. Gear; 544. Agitator blade. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-9 In specific implementation: A device for the overall unloading of an ultra-wide Bailey beam support includes a main beam 1, a disc-lock scaffold 2, a Bailey beam 3, an I-beam 4, a sand box 5, prefabricated steel pipe columns 6, a winch 7, and a wire rope 8. The winch 7 is arranged on the top surface of the main beam 1. The prefabricated steel pipe columns 6, sand box 5, I-beam 4, Bailey beam 3, and disc-lock scaffold 2 are arranged sequentially from bottom to top to support the main beam 1. One end of the wire rope 8 passes through a reserved hole in the main beam 1 and connects to the winch 7 on the top surface of the main beam 1. The other end of the wire rope 8 is connected to the I-beam 4. The winch 7 is arranged both laterally and longitudinally along the main beam 1. The winch 7 supports the I-beam 4, Bailey beam 3, and disc-lock scaffold 2 through the wire rope 8.

[0035] The sand box 5 is filled with gravel and is placed between the I-beam 4 and the prefabricated steel pipe column 6. The sand box 5 includes a sand-containing chamber 51 and a supporting column 55 located within the sand-containing chamber 51. The supporting column 55 is supported by the gravel within the sand-containing chamber 51, and a connecting chamber 53 is provided at the bottom of the sand-containing chamber 51. The top of the prefabricated steel pipe column 6 is inserted into the connecting chamber 53. Bolts 52 penetrate the sand-containing chamber 51 from the outside in. When the bolts 52 are removed, the gravel in the sand-containing chamber 51 can flow out through the bolt holes. As the gravel flows out, the supporting column 55 gradually descends within the sand-containing chamber 51.

[0036] Based on the total weight of the I-beam 4, Bailey beam 3, and disc-lock scaffold 2, determine the required quantity of wire rope 8 and the power of the winch 7. The sand box structure is as follows: Figure 3 As shown, before installing the support structure, the sand box 5 is filled with sand and placed between the I-beam 4 and the prefabricated steel pipe column 6. Before dismantling the support structure, the sand can be unscrewed by unscrewing the bolts 52 on the side of the sand box, providing space for subsequent dismantling. The I-beam 4 is parallel to the transverse direction of the main beam 1, and the Bailey beam 3 is parallel to the longitudinal direction of the main beam 1. The I-beam 4 supports the Bailey beam 3, the Bailey beam 3 supports the disc-lock scaffold 2, and the disc-lock scaffold 2 supports the bottom formwork of the main beam 1.

[0037] Please refer to Figure 10-14 Bolt 52 includes a cap, a threaded cylinder 522, and a rod 524. The cap is fixedly connected to the threaded cylinder 522. The threaded cylinder 522 is threadedly connected to a bolt hole on the sand chamber 51 of the sand box. The rod 524 passes through the threaded cylinder 522 and is fixed to the cap, with the other end of the rod 524 inserted into the sand chamber 51. The cap includes a fixed cap 521 and a movable cap 525. One end of the rod 524 movably passes through the threaded cylinder 522 and is fixed to the movable cap 525. The fixed cap 521 is fixedly connected to the threaded cylinder 522. The side of the fixed cap 521 facing the movable cap 525 has a tapered hole, while the side of the movable cap 525 facing the fixed cap 521 has a hole with a... A tapered boss that matches the tapered hole is splined between the tapered boss and the tapered hole, so that the movable cap 525 is movably connected to the other side of the fixed cap 521. The end of the threaded cylinder 522 away from the fixed cap 521 is connected to the sand guide cylinder 523. The sand guide cylinder 523 has a hollow structure inside and matches the bolt hole on the sand box sand chamber 51. The cavity inside the threaded cylinder 522 accommodates the insertion rod 524. The sand guide cylinder 523 is also provided with a sand outlet hole 526. A descending limit component 54 is installed at the bottom of the sand box sand chamber 51. The descending limit component 54 includes two upper and lower distributed discs 541. The lower disc 541 is fixed at the bottom of the sand box sand chamber 51.

[0038] The two discs 541 are connected by a support shaft 542. The section of the insert rod 524 inserted into the sand chamber 51 is located between the two discs 541. The upper and lower ends of the support shaft 542 are respectively connected to the eccentric positions of the two discs 541, and both the upper and lower ends of the support shaft 542 are connected to the two discs 541 through bearings. The bearings at the upper and lower ends of the support shaft 542 are respectively located inside the two discs 541. The upper and lower parts of the outer wall of the support shaft 542 are connected to wave-shaped stirring blades 544. A gear 543 is sleeved on the outer wall of the support shaft 542. A rack 527 is fixed to the outside of the section of the insert rod 524 inserted into the sand chamber 51. The rack 527 meshes with the gear 543.

[0039] When bolt 52 is removed directly, the sand in the sand box 5 may clog the bolt hole when it is discharged. Therefore, bolt 52 has been optimized and improved. After bolt 52 is rotated off the bolt hole, the threaded cylinder 522 disengages from the bolt hole, but the sand cylinder 523 immediately enters the bolt hole, and the sand enters the sand cylinder 523 and is discharged from the sand outlet 526 on the sand cylinder 523. This prevents the sand from clogging the threaded groove of the bolt hole. At the same time, the movable cap 525 can be detached from the fixed cap 521, and then the movable cap 525 can be pulled continuously, causing the insert rod 524 to move in the sand chamber 51 of the sand box, which accelerates the flow rate of the sand. While the insert rod 524 is moving, it will drive the gear 543 to rotate using the rack 527 on its outside. When the gear 543 rotates, the support shaft 542 drives the stirring blade 544 to rotate, which promotes the flow of sand and prevents the sand from being pressed together by the pressure from above, thus preventing the sand from being unable to be discharged.

[0040] The following are the specific construction steps for using an overall unloading device for an ultra-wide Bailey beam support:

[0041] The first step involves arranging prefabricated steel pipe columns (6), sand boxes (5), I-beams (4), Bailey beams (3), and disc-lock scaffolding (2) sequentially from bottom to top to bear the construction loads from the main beam formwork, reinforcing cage, poured concrete, and the main beam during curing. Figure 1 As shown;

[0042] The second step involves fixing a winch 7 to the top surface of the main beam 1 after its curing is complete and the lower supports can be removed. The winch 7 is connected to a wire rope 8, which passes through a pre-drilled hole in the main beam 1 and connects to the I-beam 4. The wire rope 8 supports the I-beam 4, the Bailey bridge 3, and the disc-lock scaffold 2. Figure 2 As shown;

[0043] The third step is to unscrew the bolts 52 on the side of the sand box 5 to release the sand until the sand box 5 is completely separated from the I-beam 4 above it. Then remove the sand box 4. At this point, the prefabricated steel pipe column 6 will also be separated from the I-beam 4. Figure 4As shown;

[0044] The fourth step involves dismantling the prefabricated steel pipe column into six sections. A crane is used to move the dismantled sections along the transverse direction of the main beam 1, and a trailer is used to transport the sections away. Figure 5 As shown;

[0045] Fifth, the winch 7 uses wire rope 8 to gradually and slowly lower the I-beam 4, Bailey beam 3, and disc-lock scaffold 2 as a whole until they reach the ground. Figure 6 and Figure 7 As shown;

[0046] Step 6: Disassemble the disc-lock scaffold 2, Bailey beam 3, and I-beam 2. Use a crane to lift the disc-lock scaffold 2, Bailey beam 3, and I-beam 2 in sequence and transport them away with a trailer. If transportation conditions permit, transport the disc-lock scaffold 2, Bailey beam 3, and I-beam 2 as a whole.

[0047] In specific embodiment 1, during the construction of the main girder of a rotating cable-stayed bridge, the main girder is first cast on-site using Bailey bridge supports on the land on both sides of the riverbank or existing traffic lines. After the main girder has been cured and the stay cables have been tensioned, the Bailey bridge supports can be dismantled as a whole using the method of this invention. Figure 8 As shown.

[0048] In specific embodiment 2, for box girder bridges, the main girder between two piers is cast on-site using a Bailey beam support system. Once the main girder is cured and the piers can support it, the Bailey beam support system can be completely dismantled using the method of this invention. Figure 9 As shown 。

[0049] In addition, depending on the construction needs on site, the winch 7 can be replaced with a through-hole hydraulic jack, and the wire rope 8 can be replaced with a precision-rolled threaded steel bar, both of which are used to suspend the I-beam 4. As for the installation of the through-hole hydraulic jack and the precision-rolled threaded steel bar, it is a conventional method and will not be described in detail here.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for the overall unloading of an ultra-wide Bailey beam support, comprising a main beam (1), characterized in that, It also includes a disc-lock scaffold (2), a Bailey beam (3), an I-beam (4), a sand box (5), a prefabricated steel pipe column (6), a winch (7), and a wire rope (8). The winch (7) is arranged on the top surface of the main beam (1). The prefabricated steel pipe column (6), sand box (5), I-beam (4), Bailey beam (3), and disc-lock scaffold (2) are arranged sequentially from bottom to top to support the main beam (1). One end of the wire rope (8) passes through a reserved hole in the main beam (1) and is connected to the winch (7) on the top surface of the main beam (1). The other end of the wire rope (8) is connected to the I-beam (4). The winch (7) is arranged along both the transverse and longitudinal directions of the main beam (1). The winch (7) supports the I-beam (4), Bailey beam (3), and disc-lock scaffold (2) through the wire rope (8). The sand box (5) is filled with sand and gravel. The sand box (5) is placed between the I-beam (4) and the prefabricated steel pipe column (6). The sand box (5) includes a sand box containing chamber (51) and a supporting column (55) inside the sand box containing chamber (51). The bottom of the sand box containing chamber (51) is provided with a connecting chamber (53). The sand box containing chamber (51) is penetrated by bolts (52) from the outside to the inside. When the bolts (52) are removed, the sand and gravel in the sand box containing chamber (51) can flow out from the bolt holes on the sand box containing chamber (51). The bolt (52) includes a bolt cap, a threaded cylinder (522) and a plug rod (524). The bolt cap is fixedly connected to the threaded cylinder (522). The threaded cylinder (522) is threadedly connected to the bolt hole on the sand box sand chamber (51). The plug rod (524) passes through the threaded cylinder (522) and is fixed to the bolt cap. The other end of the plug rod (524) is inserted into the sand box sand chamber (51). The cap includes a fixed cap (521) and a movable cap (525). The fixed cap (521) is fixedly connected to the threaded cylinder (522), while the movable cap (525) is movably connected to the other side of the fixed cap (521). The end of the threaded cylinder (522) away from the fixed cap (521) is connected to a sand guide cylinder (523). The interior of the sand guide cylinder (523) is hollow, and the sand guide cylinder (523) is adapted to the bolt hole on the sand box sand chamber (51). The cavity inside the threaded cylinder (522) accommodates the insertion rod (524). The sand guide cylinder (523) is also provided with a sand outlet hole (526). The bottom of the sand box chamber (51) is equipped with a lowering limit assembly (54). The lowering limit assembly (54) includes two vertically distributed discs (541). The lower disc (541) is fixed to the bottom of the sand box chamber (51). The two discs (541) are connected by a support shaft (542). The end of the insertion rod (524) inserted into the sand box chamber (51) is located between the two discs (541). The upper and lower ends of the support shaft (542) are respectively connected to the eccentric positions of the two disks (541), and the upper and lower ends of the support shaft (542) are connected to the two disks (541) through bearings. The upper and lower parts of the outer wall of the support shaft (542) are connected to stirring blades (544). The outer wall of the support shaft (542) is fitted with a gear (543), and the outside of the section of the insert rod (524) inserted into the sand box sand chamber (51) is fixed with a rack (527), which meshes with the gear (543).

2. The device for the overall unloading of the ultra-wide Bailey beam support according to claim 1, characterized in that: The fixed cap (521) has a tapered hole on the side facing the movable cap (525), and the movable cap (525) has a tapered boss that matches the tapered hole on the side facing the fixed cap (521). The tapered boss and the tapered hole are splined together.

3. The device for the overall unloading of the ultra-wide Bailey beam support according to claim 1, characterized in that: The stirring blade (544) has a wavy structure.

4. The device for the overall unloading of the ultra-wide Bailey beam support according to claim 1, characterized in that: The bearings at the upper and lower ends of the support shaft (542) are located inside the two discs (541) respectively.

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