Integral dismantling device for upper cross beam truss

Abstract

The utility model provides an integral dismounting device for an upper cross beam truss. The integral dismounting device comprises a mounting mechanism, a power mechanism and a suspension mechanism, the mounting mechanism comprises two groups of distribution beams arranged on the upper cross beam, a distribution beam gap is formed between the two distribution beams, and the two distribution beams are connected through a fastening plate; the power mechanism comprises continuous jacks, the continuous jacks are installed on the upper sides of the two ends of the two distribution beams respectively, steel strands are assembled on the continuous jacks, and the lower ends of the steel strands are connected with anchorage devices. The suspension mechanism comprises two sets of suspension beams arranged on the main truss, a suspension beam gap is formed between the two distribution beams, and the lower end of the steel strand can sequentially penetrate through the distribution beam gap and the suspension beam gap, so that the anchorage devices are arranged on the lower sides of the suspension beams. The mounting mechanism is arranged on the top surface of the upper cross beam, the continuous jack is used as power, the upper cross beam truss is integrally lowered to the ground, high-altitude steel structure dismantling is changed into ground steel structure dismantling, dismantling operation of the upper cross beam truss is facilitated, potential safety hazards are reduced, and integrity of materials is kept.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to an integral dismantling device for an upper crossbeam truss. Background Technology

[0002] In bridge construction, after the concrete of the upper crossbeam has reached its design strength, the upper crossbeam support needs to be dismantled. For temporary structures such as towers or piers of cable-stayed bridges, tower cranes or large cranes are generally used for dismantling. Using this method, the superstructure of the truss can be dismantled piece by piece along the bridge direction using a tower crane. However, the truss is heavy, and due to limitations in lifting equipment and working space, it cannot be dismantled as a whole using a tower crane. Therefore, when using tower cranes and cranes for dismantling, the truss and other structures need to be cut into several sections, damaging the integrity of the materials and hindering their reuse. Furthermore, dismantling using tower cranes and cranes requires manual lifting, and attention must be paid to lifting distance, weather conditions, and equipment performance, posing significant safety hazards. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an integrated dismantling device for the upper crossbeam truss. An installation mechanism is set on the top surface of the upper crossbeam, and a continuous jack is used as a power source to lower the upper crossbeam truss to the ground as a whole. This changes the dismantling of the steel structure from high altitude to ground, which facilitates the dismantling operation of the upper crossbeam truss, reduces safety hazards, and maintains the integrity of the materials.

[0004] This utility model provides an integral dismantling device for an upper crossbeam truss, including an installation mechanism, a power mechanism, and a suspension mechanism, wherein:

[0005] The installation mechanism includes two sets of distribution beams on the upper crossbeam. Each set consists of two distribution beams, and there is a gap between the two distribution beams in each set. The upper sides of the two distribution beams are connected by fastening plates, and both ends of the distribution beams extend out to the sides of the upper crossbeam.

[0006] The power mechanism includes continuous jacks, which are installed on the upper sides of both ends of the two sets of distribution beams. The continuous jacks are equipped with steel strands, and the lower ends of the steel strands are connected to anchors. The continuous jacks are connected to the hydraulic pump station and the main control panel.

[0007] The suspension mechanism includes two sets of suspension beams on the main truss. Each set consists of two suspension beams. There is a gap between the two distribution beams in each set. Both ends of the suspension beams extend outwards to both sides of the main truss. The lower ends of the steel strands can pass through the gap between the distribution beams and the gap between the suspension beams in sequence, so that the anchor is placed on the lower side of the suspension beam.

[0008] Preferably, it also includes a fastening mechanism, which includes two sets of embedded steel plates on the upper crossbeam, and distribution beams are respectively set on the embedded steel plates and fixedly connected to the embedded steel plates by welding. There is a pre-embedded hole between the two embedded steel plates in each set, and threaded steel is installed in the threaded hole. The threaded steel is vertically set in the gap of the distribution beam, and a fastening sleeve is installed on the upper thread of the threaded steel. A reverse pressure plate is provided at the lower end of the fastening sleeve.

[0009] Preferably, the fastening plates are arranged in pairs, with a gap between the two fastening plates in each pair. The threaded steel bar is vertically placed in the gap between the fastening plates, and the lower side of the reverse pressure plate contacts the upper side of the fastening plate.

[0010] Preferably, the continuous jack is provided with a frame box, which is fixedly installed on the upper side of the distribution beam, and a steel strand guide roller is horizontally arranged on the upper part of the frame box.

[0011] Preferably, both the distribution beam and the suspension beam are I-beam structures.

[0012] The working principle of this utility model is as follows: The overall dismantling device for the upper crossbeam truss of this utility model is equipped with an installation structure. Two sets of double-I-beams are reasonably arranged on the top surface of the completed upper crossbeam as distribution beams to install the power mechanism and as support beams for suspending and lowering the truss during dismantling. Next, continuous jacks are used as the power mechanism. Four continuous jacks are installed at both ends of the two sets of distribution beams and connected to the central control equipment placed in the middle of the upper crossbeam. Simultaneously, prestressed steel strands are anchored using anchors. The suspension mechanism on the main truss is connected to the continuous jacks through the anchors and steel strands. When the continuous jacks are working, the entire truss system is lowered to the bridge deck, where it is finally disassembled and dismantled. In addition, a fastening mechanism is set up, in which the distribution beam is welded to the pre-embedded steel plate and a fastening plate is welded to the upper side of the distribution beam for fixation. At the same time, pre-embedded holes are set on the upper crossbeam, and a screw threaded into the pre-embedded hole is used to install a fastening sleeve on it. The reverse pressure plate on the fastening sleeve contacts the fastening plate to further fix the distribution beam and ensure its stability and firmness.

[0013] The beneficial effects of this utility model are as follows: The integrated dismantling device for the upper crossbeam truss of this utility model has an installation mechanism set on the top surface of the upper crossbeam. Using continuous jacks as power, the entire upper crossbeam truss is lowered to the ground, transforming the dismantling of the steel structure from high-altitude to ground-level, facilitating the dismantling operation, reducing safety hazards, and maintaining the integrity of the materials. Using continuous jacks to dismantle the truss requires only manual assistance during the construction preparation stage; the rest is basically a mechanical and intelligent operation, fundamentally solving the safety hazards. Attached Figure Description

[0014] Figure 1 This is a perspective view of the integrated dismantling device for the upper crossbeam truss of this utility model;

[0015] Figure 2 for Figure 1 A magnified view of part A in the image;

[0016] Figure 3 for Figure 1 A magnified view of part B in the image;

[0017] Figure 4 for Figure 2 A magnified view of part C.

[0018] In the diagram: Installation mechanism 1, distribution beam 11, distribution beam gap 12, fastening plate 13, fastening plate gap 14; Power mechanism 2, continuous jack 21, steel strand 22, anchor 23, frame box 24, guide roller 25; Suspension mechanism 3, suspension beam 31, suspension beam gap 32; Fastening mechanism 4, embedded steel plate 41, threaded steel 42, fastening sleeve 43, reverse pressure plate 44; Upper crossbeam 5; Main truss 6. Detailed Implementation

[0019] To make the technical solution of this utility model easier to understand, the technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings and specific embodiments.

[0020] Example 1:

[0021] like Figures 1 to 4 As shown, the integral dismantling device for the upper crossbeam truss in this embodiment includes an installation mechanism 1, a power mechanism 2, and a suspension mechanism 3, wherein:

[0022] The installation mechanism 1 includes two sets of distribution beams 11 on the upper crossbeam 5. Each set consists of two distribution beams 11. A distribution beam gap 12 is provided between the two distribution beams 11 in each set. The upper sides of the two distribution beams 11 are connected by fastening plates 13. Both ends of the distribution beams 11 extend out to the sides of the upper crossbeam 5.

[0023] The power mechanism 2 includes a continuous jack 21, which is installed on the upper side of both ends of the two sets of distribution beams 11. The continuous jack 21 is equipped with steel strands 22, and the lower end of the steel strands 22 is connected to the anchor 23. The continuous jack 21 is connected to the hydraulic pump station and the main control panel.

[0024] The suspension mechanism 3 includes two sets of suspension beams 31 mounted on the main truss 6. Each set consists of two suspension beams 31. A suspension beam gap 32 is provided between the two distribution beams 11 in each set. Both ends of the suspension beams 31 extend outwards to both sides of the main truss 6. The lower end of the steel strand 22 can pass through the distribution beam gap 12 and the suspension beam gap 32 in sequence, so that the anchor 23 is placed under the suspension beam 31.

[0025] Example 2:

[0026] like Figures 1 to 4 As shown, the integral dismantling device for the upper crossbeam truss in this embodiment includes an installation mechanism 1, a power mechanism 2, a suspension mechanism 3, and a fastening mechanism 4, wherein:

[0027] The installation mechanism 1 includes two sets of distribution beams 11 on the upper crossbeam 5. Each set consists of two distribution beams 11. A distribution beam gap 12 is provided between the two distribution beams 11 in each set. The upper sides of the two distribution beams 11 are connected by fastening plates 13. Both ends of the distribution beams 11 extend out to the sides of the upper crossbeam 5.

[0028] The power mechanism 2 includes a continuous jack 21, which is installed on the upper side of both ends of the two sets of distribution beams 11. The continuous jack 21 is equipped with steel strands 22, and the lower end of the steel strands 22 is connected to the anchor 23. The continuous jack 21 is connected to the hydraulic pump station and the main control panel.

[0029] The suspension mechanism 3 includes two sets of suspension beams 31 mounted on the main truss 6. Each set consists of two suspension beams 31. A suspension beam gap 32 is provided between the two distribution beams 11 in each set. Both ends of the suspension beams 31 extend outwards to both sides of the main truss 6. The lower end of the steel strand 22 can pass through the distribution beam gap 12 and the suspension beam gap 32 in sequence, so that the anchor 23 is placed under the suspension beam 31.

[0030] The fastening mechanism 4 includes two sets of embedded steel plates 41 on the upper crossbeam 5. The distribution beam 11 is respectively set on the embedded steel plates 41 and is fixedly connected to the embedded steel plates 41 by welding. An embedded hole is provided between the two embedded steel plates 41 in each set. The threaded steel bar 42 is installed in the threaded hole. The threaded steel bar 42 is vertically set in the gap 12 of the distribution beam. The upper thread of the threaded steel bar 42 is fitted with a fastening sleeve 43. The lower end of the fastening sleeve 43 is provided with a reverse pressure plate 44.

[0031] The fastening plates 13 are arranged in pairs, and a fastening plate gap 14 is provided between the two fastening plates 13 in each pair. The threaded steel bar 42 is vertically arranged in the fastening plate gap 14, and the lower side of the reverse pressure plate 44 contacts the upper side of the fastening plate 13.

[0032] The continuous jack 21 is provided with a frame box 24, which is fixedly installed on the upper side of the distribution beam 11. A steel strand guide roller 25 is horizontally arranged on the upper part of the frame box 24.

[0033] Both the distribution beam 11 and the suspension beam 31 are I-beam structures.

[0034] How to use this utility model:

[0035] 1. Install the overall dismantling device for the upper beam truss:

[0036] (1) Installation of distribution beam: Double H45b I-beams are used as distribution beam 11. Since the top surface of the upper crossbeam 5 is arc-shaped, it is necessary to ensure the flatness of the distribution beam by pre-embedded steel plate 41 or pad. The distance between the edges of the two I-beam ribs is 30cm. After installation, it must be fully welded to the pre-embedded steel plate 41. Then, using the pre-embedded holes, use φ32mm diameter precision rolled threaded steel 42 to vertically pass through the distribution beam gap 12. Then, I20 double I-beams are set on the top surface of the distribution beam 11 as fastening plates 13, and fastening sleeves 43 are used to fit on the threaded steel. The reverse pressure plate 44 contacts the fastening plate to ensure that the distribution beam 11 is stable and firm.

[0037] (2) Installation of the suspension beam: Since an I-beam was already installed on the upper side of the main truss during the construction of the upper crossbeam, this can be used as the suspension beam 31, requiring only reinforcement measures. The reinforcement adopts the form of welding and U-shaped buckle bolting. At the connection between the suspension beam 31 and each main truss 6, it must be fully welded to the main truss and U-shaped buckles must be added to ensure a firm connection between the suspension beam 31 and the main truss 6.

[0038] (3) Installation of continuous jacks: Four continuous jacks 21 with a capacity of not less than 100t are used on site. The continuous jacks 21 are installed on the distribution beam 11 on the top surface of the upper crossbeam, with their center 100cm away from the longitudinal edge of the upper crossbeam. The bottom of the continuous jacks 21 is firmly welded to the distribution beam 11 steel through triangular stiffening plates to prevent overturning.

[0039] (4) Lifting frame box: A frame box 24 is placed on each continuous jack 21. The frame box 24 is mainly used to protect the continuous jack 21 and ensure that the steel strand 22 passes smoothly through the continuous jack 21. The frame box 24 is made of I-beams and steel pipes, with a height of not less than 2.7m and a bottom dimension of 0.6m×0.6m.

[0040] (5) Steel strand installation: The steel strands 22 used by the continuous jack 21 are installed from top to bottom. Each continuous jack has 6 steel strands 22 installed. The steel strands 22 should not be in contact with the distribution beam 11 and the suspension beam 31 to prevent scratching the steel strands 22. The top of the steel strands 22 is clamped by the continuous jack 21, and its bottom is locked by the anchor 24. Since the contact area between the suspension beam 31 and the anchor 24 is small, a steel plate with a thickness of not less than 30mm needs to be placed between them. The plane size of the steel plate is 40cm×40cm.

[0041] (6) Lifting the upper crossbeam truss: After the distribution beam 11, suspension beam 31, continuous jack 21 and steel strand 22 are ready to be in place, start the continuous jack 21 to start lifting, and apply a total lifting force of 50t to the upper crossbeam truss.

[0042] 2. Remove the connecting components between the main truss side and the cable tower:

[0043] After the upper crossbeam truss has been supported by continuous jacks to a capacity of 120t, begin dismantling the welded parts between the top of the main truss and the embedded parts of the tower, as well as the filling parts between the middle of the main truss and the tower arm, dismantling from top to bottom. Note that after all embedded parts are cut off, they must be immediately ground and coated with anti-rust paint.

[0044] 3. Remove the corbel:

[0045] After the main truss and tower connecting components are completely removed, the lower supporting brackets of the main truss will be dismantled. Before dismantling the brackets, the pads and crossbeams 1 should be welded sequentially to ensure that the pads and crossbeams 1 do not fall off after the brackets are removed. Each bracket weighs 1.45 tons.

[0046] Use a 2t chain hoist to securely suspend the bracket. Then, use the movable chain hoist to remove the steel plate and square timber between the bracket and the pre-embedded box. After removal, use the chain hoist to pull the bracket out of the pre-embedded box hole, ensuring that the bracket does not contact the tower arm during lowering.

[0047] 4. Lower the main truss

[0048] After the corbels are removed, check again whether the main truss is connected to the tower arm. Only after confirming that there is no connection can continuous jacks be used to lower it. Each upper crossbeam must be assigned a general worker to assist the operators at any time and to straighten the steel strands. Lowering can only be stopped when the bottom of the main truss is 1m away from the bridge deck. Then, use tower cranes and chain conveyors to dismantle the main truss sections one by one from the outside to the inside.

[0049] It should be noted that the embodiments described herein are only some embodiments of this utility model, and not all implementations of this utility model. These embodiments are merely illustrative and are intended only to provide a more intuitive and clear way of understanding the content of this utility model, not to limit the technical solutions described herein. All other implementation methods that can be conceived by those skilled in the art without creative effort, as well as other simple substitutions and variations of the technical solutions of this utility model, without departing from the concept of this utility model, are within the protection scope of this utility model.

Claims

1. A modular dismantling device for an upper crossbeam truss, characterized in that, It includes an installation mechanism (1), a power mechanism (2), and a suspension mechanism (3), wherein: The installation mechanism (1) includes two sets of distribution beams (11) on the upper crossbeam. Each set consists of two distribution beams (11). A distribution beam gap (12) is provided between the two distribution beams (11) in each set. The upper sides of the two distribution beams (11) are connected by a fastening plate (13). Both ends of the distribution beams (11) extend out to the sides of the upper crossbeam. The power mechanism (2) includes a continuous jack (21), which is installed on the upper side of both ends of the two sets of distribution beams (11). The continuous jack (21) is equipped with a steel strand (22), and the lower end of the steel strand (22) is connected to an anchor (23). The continuous jack (21) is connected to the hydraulic pump station and the main control console. The suspension mechanism (3) includes two sets of suspension beams (31) on the main truss. Each set consists of two suspension beams (31). There is a suspension beam gap (32) between the two distribution beams (11) in each set. Both ends of the suspension beams (31) extend outward to both sides of the main truss. The lower end of the steel strand (22) can pass through the distribution beam gap (12) and the suspension beam gap (32) in sequence, so that the anchor (23) is placed under the suspension beam (31).

2. The integral dismantling device for the upper crossbeam truss as described in claim 1, characterized in that, It also includes a fastening mechanism (4), which includes two sets of embedded steel plates (41) on the upper crossbeam. The distribution beam (11) is respectively set on the embedded steel plates (41) and is fixedly connected to the embedded steel plates (41) by welding. There is an embedded hole between the two embedded steel plates (41) in each set. The threaded steel (42) is installed in the embedded hole. The threaded steel (42) is vertically set in the gap (12) of the distribution beam. The upper thread of the threaded steel (42) is fitted with a fastening sleeve (43). The lower end of the fastening sleeve (43) is provided with a reverse pressure plate (44).

3. The integral dismantling device for the upper crossbeam truss as described in claim 2, characterized in that, The fastening plates (13) are arranged in pairs, and a fastening plate gap (14) is provided between the two fastening plates (13) in each pair. The threaded steel (42) is vertically arranged in the fastening plate gap (14), and the lower side of the reverse pressure plate (44) contacts the upper side of the fastening plate (13).

4. The integral dismantling device for the upper crossbeam truss as described in claim 1, characterized in that, The continuous jack (21) is provided with a frame box (24), which is fixedly installed on the upper side of the distribution beam (11). A steel strand guide roller (25) is horizontally installed on the upper part of the frame box (24).

5. The integral dismantling device for the upper crossbeam truss as described in claim 1, characterized in that, Both the distribution beam (11) and the suspension beam (31) are I-beam structures.

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