A construction method for integral installation and disassembly of cast-in-place bracket for cross beams on high tower

Abstract

The present application discloses a construction method for the overall installation and disassembly of a cast-in-place support for a beam on a high tower, which includes the following steps: S1, pre-burying a supporting corbel and a lifting device on the main tower; S2, assembling a beam support on the ground, installing a supporting steel beam at both ends of the beam support, the supporting steel beam is slidably connected to the beam support, and installing a first driving member on the beam support to drive the supporting steel beam to move; S3, using a lifting device to lift the beam support, when the supporting steel beam is located above the supporting corbel, using the first driving member to drive the supporting steel beam until the supporting steel beam moves into place, and then lowering the beam support until the supporting steel beam is placed on the supporting corbel; S4, carrying out the construction of the main tower beam; S5, when the construction of the main tower beam is completed, lifting the beam support to separate the supporting steel beam from the supporting corbel, using the first driving member to retract the supporting steel beam, and then lowering the beam support. The present application has the effect of improving the installation and disassembly efficiency of the beam support and improving the construction safety.

Description

Technical Field

[0001] The present application relates to the technical field of main tower construction, and in particular to a construction method for integrally installing and disassembling a cast-in-place bracket for a cross beam on a high tower. Background Art

[0002] The main tower of a large-span cable-stayed bridge or suspension bridge generally consists of two main towers and a crossbeam arranged between the two main towers. When constructing the upper crossbeam, it is difficult to construct the main tower crossbeam because the upper crossbeam is heavy and high above the ground.

[0003] At present, the conventional method of constructing the upper beam of a high tower generally adopts the ground bracket method or the "bracket + high-altitude bracket" method. However, due to the high height of the upper beam, the ground bracket has a high height, which leads to high construction safety risks, high difficulty in construction control, and the risk of limited scope of use. The "bracket + high-altitude bracket" method is used to construct the main tower beam, but there are disadvantages such as difficulty in bracket installation and removal, high-altitude brackets must be installed and removed in blocks, many high-altitude operations, difficult high-altitude welding, difficult to ensure construction quality, and high construction risks. Summary of the invention

[0004] In order to improve the installation and disassembly efficiency of the main tower crossbeam support and reduce the construction risk, the present application provides a construction method for the overall installation and disassembly of the cast-in-place crossbeam support on a high tower.

[0005] The present application provides a construction method for integrally installing and disassembling a cast-in-place bracket for a cross beam on a high tower, which adopts the following technical solution:

[0006] A construction method for integrally installing and disassembling a cast-in-place bracket for a cross beam on a high tower comprises the following steps:

[0007] S1. During the construction of the main tower, the supporting bracket and the lifting device are pre-buried on the main tower. The lifting device is located above the supporting bracket, and a space is reserved between the lifting device and the support for the crossbeam bracket to be placed;

[0008] S2. Assemble the beam bracket on the ground, build a lifting platform on the top of the beam bracket, install support steel beams at both ends of the beam bracket, the support steel beams are slidably connected to the beam bracket, and install a first driving member on the beam bracket to drive the support steel beam to move;

[0009] S3, using the lifting device to lift the crossbeam support, when the supporting steel beam is located above the supporting corbel, using the first driving member to drive the supporting steel beam until the supporting steel beam moves into position, and then lowering the crossbeam support until the supporting steel beam is placed on the supporting corbel;

[0010] S4. Build the formwork frame on the lifting platform, and then carry out the main tower beam construction;

[0011] S5. After the construction of the main tower beam is completed, the demoulding is performed using a lifting platform, and then the beam bracket is lifted to separate the supporting steel beam from the supporting bracket, the supporting steel beam is retracted using the first driving member, and then the beam bracket is lowered to complete the beam construction.

[0012] By adopting the above technical solution, the crossbeam bracket is assembled on the ground, and then the crossbeam bracket is lifted by the lifting device. When the crossbeam bracket is located above the supporting corbel, the first driving member drives the supporting steel beam to move toward the main tower until the supporting steel beam moves into place, and then the crossbeam bracket is lowered until the supporting steel beam is placed on the supporting corbel to complete the lifting of the crossbeam bracket. After the construction of the main tower crossbeam is completed, the demoulding is performed using a lifting platform, and then the crossbeam bracket is lifted to separate the supporting steel beam from the supporting corbel, and the supporting steel beam is retracted using the driving member, and then the crossbeam bracket is lowered to complete the construction of the crossbeam. During the installation and disassembly process between the crossbeams, there is no need to perform high-altitude operations, which not only improves the construction efficiency, but also significantly improves the construction safety.

[0013] Preferably, when pre-embedding supporting corbels, multiple supporting corbels are pre-embedded on the opposite side of each main tower, and the multiple supporting corbels are spaced side by side along the thickness direction of the main tower. Positioning devices are provided on the two supporting corbels located at the ends, and the positioning devices are used to position the crossbeam bracket so that the crossbeam bracket will not collide with the supporting corbels during the lifting process and will be stably placed on the supporting corbels.

[0014] By adopting the above technical solution, by pre-embedding multiple supporting brackets, the supporting capacity of the beam bracket can be significantly improved, thereby improving construction safety. At the same time, by arranging a positioning device on the supporting bracket at the end to position the beam bracket, the beam bracket will not collide with the supporting bracket during the lifting process, which is not only convenient for lifting, but also will not damage the supporting bracket, thereby helping to improve construction safety.

[0015] Preferably, the positioning device includes a positioning plate, which is hinged to the side of the supporting corbel, and the side of the positioning plate away from the hinge axis exceeds the lower surface of the supporting corbel, and the supporting corbel is provided with a second driving member for driving the positioning plate to rotate in a vertical plane; positioning strips are fixedly connected to the corresponding positioning plates on both sides in the length direction of the beam bracket, and when the positioning plate is rotated to vertical, the spacing between the two opposite positioning plates matches the spacing between the two positioning strips located at the same end of the beam bracket.

[0016] By adopting the above technical solution, initially, the two positioning plates are distributed in an eight-shaped shape. When the upper end of the beam bracket enters between the two positioning plates, the second driving member drives the positioning plate to rotate in the direction close to the supporting corbel until the positioning plate fits with the supporting corbel; during this period, the positioning plate corrects the position of the beam bracket in the width direction through the positioning bar, so that the beam bracket will not collide with the supporting corbel. When the upper end of the beam bracket passes over the supporting corbel, the positioning plate is reset under the action of the second driving member. When the lower end of the beam bracket enters between the two positioning plates, the second driving member drives the positioning plate to rotate in the direction close to the supporting corbel again until the positioning plate fits with the supporting corbel. The positioning plate plays a positioning role in the width direction of the beam bracket, so that the beam bracket will not collide with the supporting corbel during the lifting process, thereby facilitating the lifting of the beam bracket. At the same time, it will not collide with the supporting corbel, so that the connection position between the supporting corbel and the main tower will not crack, so that the supporting corbel and the main tower are firmly connected, which is conducive to improving construction safety, and will not damage the main tower structure, so that the quality of the main tower remains stable.

[0017] Preferably, one end of the positioning plate extends beyond the end of the supporting corbel away from the main tower, and a groove is recessed on one side of the positioning plate close to the supporting corbel, and the groove is located on the segment of the positioning plate that extends beyond the supporting corbel, and the groove passes through the upper and lower surfaces of the positioning plate, and the groove includes a flared section and a straight section, and the straight section is located above the flared section and is connected to the small end of the flared section, and one side of the straight section is flush with the end of the supporting corbel away from the main tower, and the positioning strip is slidably connected to the straight section, and when the positioning plate is rotated to a vertical state, the spacing between the bottoms of the grooves on the two relative positioning plates is equal to the spacing between the two positioning strips located at the same end of the crossbeam bracket.

[0018] By adopting the above technical solution, when the positioning strip is between the two positioning plates, the second driving member drives the positioning plate to rotate in the direction close to the supporting corbel, thereby correcting the position of the crossbeam support in the width direction. When the positioning plate fits the supporting corbel, the positioning strip is located in the flared section, and the crossbeam support continues to be lifted. The positioning strip gradually slides into the straight section through the flared section, thereby preliminarily correcting the position of the crossbeam support in the length direction, so that after the crossbeam support is placed on the supporting corbel, the supporting corbel is evenly stressed, and there will be no cracking of the connection between the supporting corbel and the main tower due to excessive stress on individual corbel supports.

[0019] Preferably, the positioning device also includes a transverse positioning mechanism, which includes a fixed tube arranged on the upper surface of the supporting corbel, an insertion strip being slidably inserted in the fixed tube, and a connecting plate being fixedly connected to one end of the insertion strip away from the main tower; a limiting member for limiting the sliding of the insertion strip relative to the fixed tube and an unlocking component for unlocking the limiting member are provided on the fixed tube, and when the limiting member limits the insertion strip, a side of the connecting plate away from the insertion strip is flush with a side of the supporting corbel away from the main tower.

[0020] By adopting the above technical solution, after the crossbeam bracket passes over the supporting corbel, it needs to continue to be lifted to a certain height so that the supporting steel beam can move normally. During this process, the crossbeam bracket will still slide, which may cause uneven force on the supporting corbels on both sides. Therefore, by setting a transverse positioning component, when the lower end of the crossbeam bracket passes over the supporting corbel, the positioning strip and the connecting plate are pressed tightly, so that the crossbeam bracket will not shake along the length direction. After that, the first driving member drives the supporting steel beam to move, and the unlocking component unlocks the limiter so that the insert can move relative to the fixed tube, so that the supporting steel beam can be smoothly placed on the supporting corbel, and the supporting corbel is evenly stressed, thereby eliminating the possibility that the connection between the supporting corbel and the main tower will crack due to excessive force on individual corbel supports.

[0021] Preferably, the limiting member comprises a limiting strip, the side wall of the fixing tube is provided with a through hole for the limiting strip to pass through, the inserting strip is provided with an insertion hole for the limiting strip to be inserted, and the unlocking assembly is used to pull the limiting strip out of the through hole.

[0022] By adopting the above technical solution, initially, the limiting strip passes through the through hole and is inserted into the insertion hole, thereby limiting the movement of the insertion strip relative to the fixed tube, so that the connecting plate plays a limiting role on the crossbeam support.

[0023] Preferably, the unlocking assembly includes a first connecting rod, one end of the first connecting rod penetrates the connecting plate and is hinged to the second connecting rod, the rotation plane of the second connecting rod is perpendicular to the connecting plate, and the end of the second connecting rod away from the first connecting rod is hinged to the limit strip; the end of the first connecting rod away from the second connecting rod is fixedly connected to a fixed block, the cross-sectional area of ​​the fixed block is larger than the cross-sectional area of ​​the first connecting rod, a spring is sleeved on the first connecting rod, the spring is located between the fixed block and the connecting plate, and the positioning strip is provided with an avoidance groove for avoiding the first connecting rod and the fixed block.

[0024] By adopting the above technical solution, when the crossbeam support is hoisted into place, the first driving member drives the supporting steel beam to move. During the movement, the supporting steel beam contacts the fixed block and pushes the first connecting rod to move in the direction close to the main tower. The movement of the first connecting rod drives the movement of the second connecting rod. The lower end of the second connecting rod moves up and pulls the limit bar up until the limit bar exits the through hole to achieve unlocking. After that, the supporting steel beam continues to move and pushes the connecting plate to move, so that the supporting steel beam can be stably placed on the supporting corbel. The presence of the spring and the fixed block prevents the limit bar from falling out of the through hole under the influence of wind or other factors, so that the connecting plate maintains the limiting effect on the crossbeam support at the beginning.

[0025] Preferably, in step S2, the crossbeam support is assembled between the two main towers to facilitate subsequent lifting of the crossbeam support.

[0026] By adopting the above technical solution, it is convenient to lift the beam bracket, which is beneficial to improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the lifting beam bracket in this application;

[0028] Figure 2 is a schematic diagram of the structure of the bottom bracket in this application;

[0029] Figure 3 It is a schematic diagram of the connection between the supporting steel beam and the crossbeam bracket in this application;

[0030] Figure 4 It is a structural schematic diagram of a supporting corbel provided with a positioning device in the present application;

[0031] Figure 5 It is a schematic diagram of the structure when the supporting steel frame is installed in this application.

[0032] Description of reference numerals:

[0033] 1. Main tower; 2. Supporting bracket; 3. Lifting device; 31. Fixed frame; 32. Continuous jack; 4. Crossbeam bracket; 41. Bottom bracket; 411. I-beam; 412. Connection system; 42. Top bracket; 43. Support frame; 5. Lifting platform; 51. Jack; 52. Bottom formwork frame; 6. Support steel beam; 7. First driving member; 8. Positioning strip; 9. Fixed plate; 10. Strengthening rib plate; 11. Pulley; 12. Positioning plate; 13. Second driving member; 14. Groove; 141. Expanding section; 142. Straight section; 15. Transverse positioning mechanism; 151. Fixed tube; 152. Insert strip; 153. Connecting plate; 154. Limiting strip; 155. Unlocking assembly; 1551. First connecting rod; 1552. Second connecting rod; 1553. Fixed block; 1554. Spring; 16. Avoidance groove; 17. Mounting plate. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] The present application embodiment discloses a construction method for integrally installing and disassembling a cast-in-place bracket for a cross beam on a high tower. The method comprises the following steps:

[0036] S1. Reference Figure 1During the construction of the main tower 1, according to the construction position of the crossbeam, supporting corbels 2 and lifting devices 3 are embedded on the opposite sides of the two main towers 1. The lifting device 3 is located above the supporting corbels 2, and the lifting device 3 is used to lift the crossbeam bracket 4. A space is reserved between the lifting device 3 and the support for the crossbeam bracket 4 to be placed. It should be noted that: multiple supporting corbels 2 need to be embedded on each main tower 1, and the multiple supporting corbels 2 are evenly spaced along the width direction of the main tower 1, and it is necessary to ensure that the upper surfaces of the multiple supporting corbels 2 are located in the same horizontal plane. Then a positioning device is set on the supporting corbel 2 located at the end, and the positioning device plays a positioning role on the crossbeam bracket 4, so that the crossbeam bracket 4 will not collide with the supporting corbel 2 during the lifting process and is stably placed on the supporting corbel 2.

[0037] Specifically, the lifting device 3 includes a fixing frame 31 pre-buried on the main tower 1 and a continuous jack 32 installed on the fixing frame 31 .

[0038] The supporting corbel 2 is arranged in a long strip shape and is made of solid steel bars. In the embodiment of the present application, three supporting corbels 2 are pre-buried on each main tower 1. The specific number of supporting corbels 2 depends on the size of the main tower 1, which will not be described in detail here.

[0039] S2. Assemble the crossbeam support 4 on the ground between the two main towers 1. The crossbeam support 4 is composed of a bottom support 41, a top support 42, and a support frame 43 arranged between the bottom support 41 and the top support 42. The bottom support 41 and the top support 42 have the same structure. After the crossbeam support 4 is assembled, build a lifting platform 5 on the top support 42, and then install a supporting steel beam 6 at the bottom of the bottom support 41. The supporting steel beam 6 can move along the length direction of the bottom support 41, and then install a first driving member 7 that drives the supporting steel beam 6 to move on the bottom support 41, and then weld positioning strips 8 on both sides of the top support 42 and the bottom support 41 in the length direction at the corresponding positioning devices.

[0040] Reference Figure 2 and Figure 3The embodiment of the present application is described by taking the bottom bracket 41 as an example. The bottom bracket 41 is formed by welding a plurality of I-beams 411 arranged side by side through a connection system 412, and the connection system 412 is composed of a plurality of rods. The I-beams 411 and the supporting corbels 2 are staggered along the width direction of the main tower 1. The supporting steel beam 6 spans across the plurality of I-beams 411, and two fixing plates 9 are welded on the upper surface of the supporting steel beam 6 at the positions corresponding to each I-beam 411. The two fixing plates 9 are respectively located on both sides of the I-beam 411, and a reinforcing rib 10 is welded between the fixing plate 9 and the supporting steel beam 6. A pulley 11 is installed on the fixing plate 9, and the pulley 11 is hung on the wing plate of the I-beam 411 and is slidably connected to the I-beam 411 along the length direction of the I-beam 411. The first driving member 7 is preferably a hydraulic cylinder, which is installed on the lower surface of the I-beam 411 and located between the two supporting steel beams 6. The cylinder body of the hydraulic cylinder is hinged to the I-beam 411, and the piston rod of the hydraulic cylinder is hinged to the supporting steel beam 6. The supporting steel beam 6 is driven to move by the hydraulic cylinder.

[0041] S3. The beam support 4 is lifted by the continuous jack 32. During the lifting process, the beam support 4 is positioned by the positioning device so that the beam support 4 does not collide with the supporting bracket 2. When the supporting steel beam 6 is located above the supporting bracket 2, the first driving member 7 drives the supporting steel beam 6 to move toward the main tower 1, and then lowers the beam support 4 until the supporting steel beam 6 is placed on the supporting bracket 2.

[0042] Reference Figure 4 The positioning device includes a positioning plate 12, one side of which is hinged to the side of the supporting corbel 2, the side of the positioning plate 12 away from the hinge axis exceeds the lower surface of the supporting corbel 2, and one end of the positioning plate 12 extends beyond the end of the supporting corbel 2 away from the main tower 1. The supporting corbel 2 is provided with a second driving member 13 for driving the positioning plate 12 to rotate in a vertical plane. The second driving member 13 is preferably a hydraulic cylinder. A mounting plate 17 is welded to the side wall of the supporting corbel 2. The cylinder body of the hydraulic cylinder is hinged to the mounting plate 17, and the piston rod of the hydraulic cylinder is hinged to the positioning plate 12.

[0043] Reference Figure 3, a groove 14 is recessed on one side of the positioning plate 12 near the supporting corbel 2, and the groove 14 passes through the upper surface and the lower surface of the positioning plate 12. The groove 14 includes a flared section 141 and a straight section 142, the flared section 141 is arranged in an isosceles trapezoid, the straight section 142 is located above the flared section 141 and is connected to the small end of the flared section 141, and one side of the straight section 142 is flush with the end of the supporting corbel 2 away from the main tower 1. When the positioning plate 12 is rotated to fit the supporting corbel 2, that is, when the positioning plate 12 is rotated to be vertical, the spacing between the bottoms of the grooves 14 on the two relative positioning plates 12 is equal to the spacing between the two positioning strips 8 on the same end of the bottom bracket 41, and the spacing between the straight sections 142 on the two positioning plates 12 on the same side matches the spacing between the two positioning strips 8 on the same side of the bottom bracket 41. The positioning strip 8 is rounded on the side away from the bottom bracket 41 to prevent the positioning plate 12 from getting stuck during the rotation process.

[0044] Reference Figure 4 and Figure 5 The positioning device also includes a transverse positioning mechanism 15 arranged on the top of the supporting corbel 2. The transverse positioning mechanism 15 includes a fixed tube 151 welded to the upper surface of the supporting corbel 2. The fixed tube 151 is a square tube, and one end of the fixed tube 151 abuts against the main tower 1 or is buried in the main tower 1. A plug-in strip 152 is slidably inserted in the fixed tube 151, and one end of the plug-in strip 152 extending out of the fixed tube 151 is fixedly connected to a connecting plate 153. The connecting plate 153 is provided with a limiter for limiting the sliding of the plug-in strip 152 relative to the fixed tube 151 and an unlocking component 155 for unlocking the limiter.

[0045] The limiting member is a limiting strip 154. The side wall of the fixed tube 151 is provided with a through hole for the limiting strip 154 ​​to pass through, and the inserting strip 152 is provided with an insertion hole for the limiting strip 154 ​​to be inserted into. When the limiting strip 154 ​​is inserted into the insertion hole, the side of the connecting plate 153 away from the inserting strip 152 is flush with the side of the supporting corbel 2 away from the main tower 1.

[0046] The unlocking assembly 155 comprises a first link 1551, one end of which penetrates the connecting plate 153 and is hinged to a second link 1552, the rotation plane of the second link 1552 is perpendicular to the connecting plate 153, and one end of the second link 1552 away from the first link 1551 is hinged to the limit bar 154. One end of the first link 1551 away from the second link 1552 is fixedly connected to a fixing block 1553, the fixing block 1553 is located at the end of the first link 1551 away from the main tower 1, the cross-sectional area of ​​the fixing block 1553 is larger than the cross-sectional area of ​​the first link 1551, the first link 1551 is sleeved with a spring 1554, the spring 1554 is located between the fixing block 1553 and the connecting plate 153, and the two ends of the spring 1554 are fixedly connected to the fixing block 1553 and the connecting plate 153 respectively. The positioning bar 8 is provided with an avoidance groove 16 for avoiding the first connecting rod 1551 and the fixing block 1553 . When the spring 1554 is not subjected to external force, the first connecting rod 1551 and the fixing block 1553 can pass through the avoidance groove 16 .

[0047] Initially, the two positioning plates 12 are distributed in an eight-shaped shape. When the top bracket 42 enters between the two positioning plates 12, the lifting of the beam bracket 4 is stopped, and the positioning plate 12 is driven by the second driving member 13 to rotate in the direction close to the supporting corbel 2 until the positioning plate 12 fits with the supporting corbel 2. During this period, the positioning plate 12 corrects the position of the beam bracket 4 in the width direction through the positioning bar 8, so that the top bracket 42 will not collide with the supporting corbel 2. Then continue to lift the beam bracket 4. When the top bracket 42 passes over the supporting corbel 2, the positioning plate 12 is reset under the action of the second driving member 13. Continue to lift the beam bracket 4. When the bottom bracket 41 enters between the two positioning plates 12, the second driving member 13 drives the positioning plate 12 to rotate in the direction close to the supporting corbel 2 again until the positioning plate 12 fits with the supporting corbel 2. The positioning plate 12 has a positioning effect on the position of the beam bracket 4 in the width direction, so that the bottom bracket 41 will not collide with the supporting corbel 2 during the lifting process.

[0048] Continue to lift the crossbeam support 4, and the positioning strip 8 slides into the straight section 142 through the flared section 141, thereby automatically correcting the position of the crossbeam support 4 in the length direction. After the support steel beam 6 passes over the support bracket 2, the positioning strip 8 abuts against the connecting plate 153, and then the first driving member 7 drives the support steel beam 6 to move in the direction close to the connecting plate 153. During the movement, the support steel beam 6 abuts against the fixed plate 9 and pushes the first connecting rod 1551 to move in the direction close to the main tower 1. The movement of the first connecting rod 1551 drives the movement of the second connecting rod 1552, and the lower end of the second connecting rod 1552 moves upward to make the limiting strip 154 ​​withdraw from the through hole, thereby unlocking the insertion strip 152. Thereafter, the support steel beam 6 continues to move and pushes the connecting plate 153 to move until the connecting plate 153 abuts against the fixed tube 151, and then the crossbeam support 4 is lowered so that the crossbeam support 4 is placed on the support bracket 2, completing the lifting of the crossbeam support 4.

[0049] By setting the positioning device, not only the crossbeam support 4 will not collide with the supporting corbels 2 during the lifting process, but also when the crossbeam support 4 is placed on the supporting corbels 2, each supporting corbel 2 is evenly stressed, and there will be no cracking of the connection between the supporting corbel 2 and the main tower 1 due to excessive stress on individual supporting corbels 2, which is beneficial to improving construction safety.

[0050] S4, build a template frame on the lifting platform 5, and then carry out the cross beam construction of the main tower 1. The lifting platform 5 includes a plurality of jacks 51 installed on the top bracket 42, and the piston rods of the plurality of jacks 51 are commonly connected to the bottom template frame 52.

[0051] S5. After the construction of the cross beam of the main tower 1 is completed, the demoulding is performed using the lifting platform 5, and then the cross beam bracket 4 is lifted using the continuous jack 32 to separate the supporting steel beam 6 from the supporting corbel 2, and the supporting steel beam 6 is retracted using the first driving member 7, and then the cross beam bracket 4 is lowered using the continuous jack 32. After the cross beam bracket 4 is placed on the ground, the cross beam bracket 4 is disassembled.

[0052] The implementation principle of the construction method of the integral installation and disassembly of the cast-in-place bracket of the cross beam on the high tower in the embodiment of the present application is:

[0053] The present application embeds the supporting corbel 2 and the continuous lifting device 3 on the main tower 1, so that the installation and removal of the beam bracket 4 can be carried out by hoisting, so that the beam bracket 4 can be assembled on the ground, thereby reducing high-altitude operations, which is not only conducive to improving construction efficiency, but also significantly improving construction safety. At the same time, by arranging a positioning device on the supporting corbel 2 located at the end, the positioning device plays a positioning role on the beam bracket 4 during the lifting process, so that the beam bracket 4 will not collide with the supporting corbel 2, which is not only conducive to improving the lifting efficiency, but also makes the connection between the supporting corbel 2 and the main tower 1 not easy to crack. At the same time, the positioning device also plays a positioning role in the installation process of the beam bracket 4, so that after the beam bracket 4 is placed on the supporting corbel 2, each supporting corbel 2 is evenly stressed, thereby eliminating the possibility that the connection between the supporting corbel 2 and the main tower 1 is cracked due to excessive stress on individual supporting corbels 2.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction method for integral installation and disassembly of a cast-in-place bracket for a crossbeam on a high tower, characterized in that: The following steps are involved: S1. During the construction of the main tower (1), the supporting bracket (2) and the lifting device (3) are pre-buried on the main tower (1), the lifting device (3) is located above the supporting bracket (2), and a space is reserved between the lifting device (3) and the support for the crossbeam bracket (4) to be placed; S2, assembling a crossbeam support (4) on the ground, building a lifting platform (5) on the top of the crossbeam support (4), installing supporting steel beams (6) at both ends of the crossbeam support (4), the supporting steel beams (6) are slidably connected to the crossbeam support (4), and installing a first driving member (7) on the crossbeam support (4) for driving the supporting steel beam (6) to move; S3, using the lifting device (3) to lift the crossbeam support (4), when the supporting steel beam (6) is located above the supporting corbel (2), using the first driving member (7) to drive the supporting steel beam (6) until the supporting steel beam (6) moves into position, and then lowering the crossbeam support (4) until the supporting steel beam (6) is placed on the supporting corbel (2); S4, building a formwork frame on the lifting platform (5), and then carrying out the crossbeam construction of the main tower (1); S5. After the construction of the cross beam of the main tower (1) is completed, the demoulding is performed using the lifting platform (5), and then the cross beam bracket (4) is lifted to separate the supporting steel beam (6) from the supporting bracket (2). The supporting steel beam (6) is retracted using the first driving member (7), and then the cross beam bracket (4) is lowered to complete the construction of the cross beam.

2. The construction method for integral installation and disassembly of a cast-in-place bracket for a high tower upper beam according to claim 1 is characterized in that: When pre-embedding the supporting corbels (2), a plurality of supporting corbels (2) are pre-embedded on the opposite side of each main tower (1), and the plurality of supporting corbels (2) are spaced apart and arranged side by side along the thickness direction of the main tower (1). Positioning devices are provided on the two supporting corbels (2) at the ends, and the positioning devices are used to position the crossbeam bracket (4), so that the crossbeam bracket (4) will not collide with the supporting corbels (2) during the lifting process and is stably placed on the supporting corbels (2).

3. The construction method for integral installation and disassembly of a cast-in-place bracket for a cross beam on a high tower according to claim 2, characterized in that: The positioning device comprises a positioning plate (12), the positioning plate (12) is hinged to the side of the supporting corbel (2), the side of the positioning plate (12) away from the hinge axis exceeds the lower surface of the supporting corbel (2), and the supporting corbel (2) is provided with a second driving member (13) for driving the positioning plate (12) to rotate in a vertical plane; positioning strips (8) are fixedly connected to the corresponding positioning plates (12) on both sides of the longitudinal direction of the beam bracket (4), and when the positioning plate (12) is rotated to vertical, the spacing between the two opposite positioning plates (12) matches the spacing between the two positioning strips (8) located at the same end of the beam bracket (4).

4. The construction method for integral installation and disassembly of a cast-in-place bracket for a high tower upper beam according to claim 3 is characterized in that: One end of the positioning plate (12) extends beyond the end of the supporting corbel (2) away from the main tower (1); a groove (14) is recessed on one side of the positioning plate (12) close to the supporting corbel (2); the groove (14) is located on a section of the positioning plate (12) that exceeds the supporting corbel (2); the groove (14) passes through the upper surface and the lower surface of the positioning plate (12); the groove (14) includes an expanded section (141) and a straight section (142); the straight section (142) is located at the expanded section. The straight section (142) is above the mouth section (141) and is connected to the small end of the expanded section (141). One side of the straight section (142) is flush with the end of the supporting corbel (2) away from the main tower (1). The positioning strip (8) is slidably connected to the straight section (142). When the positioning plate (12) is rotated to a vertical state, the spacing between the bottoms of the grooves (14) on the two relatively positioning plates (12) is equal to the spacing between the two positioning strips (8) located at the same end of the crossbeam bracket (4).

5. The construction method for integral installation and disassembly of a cast-in-place bracket for a cross beam on a high tower according to claim 4, characterized in that: The positioning device further comprises a transverse positioning mechanism (15), the transverse positioning mechanism (15) comprising a fixed tube (151) arranged on the upper surface of the supporting corbel (2), a plug strip (152) being slidably inserted in the fixed tube (151), and a connecting plate (153) being fixedly connected to one end of the plug strip (152) away from the main tower (1); a limiting member for limiting the sliding of the plug strip (152) relative to the fixed tube (151) and an unlocking assembly (155) for unlocking the limiting member are arranged on the fixed tube (151); when the limiting member acts to limit the plug strip (152), a side of the connecting plate (153) away from the plug strip (152) is flush with a side of the supporting corbel (2) away from the main tower (1).

6. The construction method for integral installation and disassembly of a cast-in-place bracket for a cross beam on a high tower according to claim 5, characterized in that: The limiting member comprises a limiting strip (154); a through hole for the limiting strip (154) to pass through is formed on the side wall of the fixing tube (151); an insertion hole for the limiting strip (154) to be inserted is formed on the insertion strip (152); and the unlocking component (155) is used to pull the limiting strip (154) out of the through hole.

7. The construction method for integral installation and disassembly of a cast-in-place bracket for a cross beam on a high tower according to claim 6, characterized in that: The unlocking assembly (155) comprises a first connecting rod (1551), one end of which penetrates the connecting plate (153) and is hinged to a second connecting rod (1552), the rotation plane of the second connecting rod (1552) is perpendicular to the connecting plate (153), and one end of the second connecting rod (1552) away from the first connecting rod (1551) is hinged to the limit bar (154); the first connecting rod (1551) away from the second connecting rod (1552) ) is fixedly connected to one end of the first connecting rod (1551), the cross-sectional area of ​​the fixing block (1553) is larger than the cross-sectional area of ​​the first connecting rod (1551), a spring (1554) is sleeved on the first connecting rod (1551), the spring (1554) is located between the fixing block (1553) and the connecting plate (153), and an avoidance groove (16) for avoiding the first connecting rod (1551) and the fixing block (1553) is opened on the positioning strip (8).

8. The construction method for integral installation and disassembly of a cast-in-place bracket for a high tower upper beam according to claim 1, characterized in that: In step S2, the crossbeam support (4) is assembled between the two main towers (1) so as to facilitate the subsequent lifting of the crossbeam support (4).

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