A construction method for dismantling a rhombic hanging basket

Abstract

The application provides a construction method for dismantling a rhombic hanging basket, after the main beam hanging basket construction is completed, the hanging basket anchoring system is converted, that is, a 32mm precision rolled threaded steel is used to anchor the bottom basket system on the concrete main beam, the original suspender and sling connected between the front upper cross beam and the bottom basket are replaced; and the bottom basket and side mold are lowered by a certain height. After the anchoring system conversion, the upper structure of the hanging basket is dismantled by using a truck crane, the inner mold is dismantled, and the lower part of the hanging basket is dismantled by using an aerial disassembly method. The aerial disassembly method is used, that is, the upper structure of the hanging basket is dismantled by using a truck crane, then the lower part of the hanging basket is aerially disassembled by using multiple hoisting equipment cooperation, the concrete main beam projection area is pulled out by using a winch, and finally the hanging basket is lifted to the bridge deck by using a truck crane. The economic cost is high and the cycle is long due to the influence of geographical factors, and the rhombic hanging basket cannot be directly and integrally lowered, and the problems are solved.

Description

Technical Field

[0001] This invention specifically relates to a construction method for dismantling a diamond-shaped hanging basket, mainly addressing the problem that the diamond-shaped hanging basket cannot be lowered as a whole due to geographical limitations. Background Technology

[0002] The most common method for dismantling a diamond-shaped hanging basket is to lower it as a whole. This involves lowering the lower structure of the basket to a designated area using winches, continuous jacks, or other lifting equipment after the superstructure has been dismantled. This method is technologically mature, has a high safety factor, and a short construction period. However, it can sometimes be limited by geographical factors, making the overall lowering plan difficult to implement and lacking advantages in terms of economy and time. For example, if the area below the hanging basket is swampy, inaccessible to ships (rivers, lakes, or high mountains), the conventional method requires the basket to be moved back from the closure section to a suitable area before being lowered as a whole. However, for a central cable-stayed bridge, moving the basket back is extremely difficult and also increases the construction period and risks. Summary of the Invention

[0003] The purpose of this invention is to provide a construction method for dismantling a diamond-shaped hanging basket, which solves the problem of high economic cost and long cycle caused by the inability to directly lower the diamond-shaped hanging basket as a whole due to geographical factors.

[0004] Therefore, the technical solution provided by the present invention is as follows:

[0005] A construction method for dismantling a diamond-shaped hanging basket includes the following steps:

[0006] Step 1) Replace the lifting rods and slings connecting the upper crossbeam of the hanging basket to the bottom basket with precision rolled threaded steel bars, anchor the bottom basket system to the concrete main beam, and lower the bottom basket and side formwork to a certain height;

[0007] Step 2) Disassemble the upper structure and inner mold of the hanging basket. The upper structure includes the front upper crossbeam, the middle gantry, the diamond frame, and the track.

[0008] The dismantling sequence is as follows: front upper crossbeam → middle gantry → diamond frame → track → inner formwork;

[0009] Step 3) Disassemble the lower structure of the hanging basket using the aerial dismantling method. The lower structure includes a tensioning platform, outer guide beam, side formwork, bottom formwork, bottom longitudinal beam, traveling guide beam, and bottom support beam.

[0010] The dismantling sequence is as follows: tensioning platform → outer guide beam → side formwork → bottom formwork → bottom longitudinal beam → traveling guide beam → bottom support beam.

[0011] The dismantling process of the front upper crossbeam described in step 2) is as follows: First, tie the steel wire rope of the truck crane to the front upper crossbeam segment to be dismantled, then remove the connecting bolts, and then use the truck crane to lift the dismantled components to the bridge deck. Repeat this step until the front upper crossbeam is completely dismantled.

[0012] The dismantling process of the middle gantry described in step 2) is as follows: use guy ropes to fix the hanging basket diamond frame, and dismantle the middle gantry in sections according to the principle of dismantling the sides first and then the middle.

[0013] The dismantling process of the diamond frame described in step 2) is as follows: connect the steel wire rope of the truck crane to the diamond frame, and after the steel wire rope is under tension, release the restraint of the rear anchor rod and guy rope on the diamond frame; after the individual diamond frame is laid down as a whole, dismantle each component of the diamond frame step by step.

[0014] The process of dismantling the track described in step 2) is as follows: the track is dismantled using a truck crane, and then the pad beam is moved.

[0015] The process of removing the inner formwork described in step 2) is as follows: First, the inner formwork box is disassembled manually. After disassembly, the formwork is removed from the pre-reserved hole at the top of the concrete main beam using a truck crane.

[0016] The dismantling process of the tensioning platform described in step 3) is as follows: First, four hand-operated hoists are set up in the beam body to connect the bottom support beam. Then, winches No. 1 and No. 2 are installed at the reserved positions of the concrete main beam. Next, steel wire rope protection devices are installed on the outer edge of the beam wing plate. Finally, the aerial dismantling method is used for dismantling.

[0017] The outer guide beams mentioned in step 3) are dismantled one by one. The specific process is as follows: connect the steel wire rope of the truck crane to the outer guide beam, then use a temporary hand chain hoist to lower the outer guide beam, lift the steel wire rope of the truck crane, and after the outer guide beam is pulled out of the projection area of ​​the concrete main beam, release the constraint of the temporary hand chain hoist and use the truck crane to lift it to the bridge deck.

[0018] In step 3), the side formwork is dismantled in stages, specifically the wing plate and the web plate. The dismantling method is as follows: First, install winch #1 and winch #2 and the truck crane wire rope on the side formwork to be hoisted. Then, disconnect the wing plate formwork from the bottom bolt connection of the rounded chamfer and hoist it to the bridge deck with the help of the winch and the truck crane.

[0019] The No. 2 winch wire rope is installed at the bottom of the side formwork, and the No. 1 winch wire rope is installed in the upper middle part of the side formwork. The No. 1 winch controls the lifting of the side formwork, while the No. 2 winch controls the side formwork to gradually become vertical. When the No. 1 winch wire rope is horizontal, the side formwork is completely vertical. Then, the truck crane lifts the side formwork to the bridge deck. This process is repeated until the side formwork is completely dismantled.

[0020] The dismantling process of the bottom formwork described in step 3) is as follows: First, the bottom formwork is divided into small templates according to the assembly blocks. At the same time, the No. 2 winch is moved to another reserved position and installed, and pulleys are installed on the concrete main beam. Then, a truck crane and the wire rope of the No. 1 winch are installed on the outside of the small templates. The wire rope of the No. 2 winch is installed on the inside. The No. 1 winch slowly pulls the small template out of the projection area of ​​the concrete main beam and gradually raises its height. At the same time, the No. 2 winch controls the small template to gradually make it vertical. When the wire rope of the No. 1 winch is horizontal, the small template is completely vertical. Then, the truck crane lifts it to the bridge deck. Repeat this step until the bottom formwork is completely dismantled.

[0021] Step 3) describes the removal of the bottom longitudinal beams one by one. The specific process is as follows: two winches work together to pull the bottom longitudinal beams out of the concrete main beam area, while controlling their aerial posture to keep them vertical. Then, a truck crane lifts them to the bridge deck. Among them, two bottom longitudinal beams are left on the two longer bottom support beams. The two longer bottom support beams are the two longer sections on the front bottom support beam and the two longer sections on the rear bottom support beam.

[0022] The bottom support beam described in step 3) is dismantled in a partial-to-whole manner. The specific process is as follows: First, the shorter section of the bottom support beam is separated from the whole beam and then lifted to the bridge deck by a winch and a truck crane; then, the two longer sections of the front and rear bottom support beams are unfastened at the bolted joints, so that the front and rear bottom support beams and the bottom longitudinal beams form a "well" shape. The "well" shaped beam is then lifted as a whole by a winch and a truck crane and dismantled in sections.

[0023] The beneficial effects of this invention are:

[0024] This invention employs an aerial dismantling method, which involves using a truck crane to dismantle the upper structure of the hanging basket, then using multiple lifting devices in coordination to dismantle the lower components of the hanging basket in mid-air. A winch is then used to swing the lower components out of the main beam's projection area, and finally, a truck crane lifts them to the bridge deck. This solves the problem of high economic costs and long timelines associated with the inability to directly lower diamond-shaped hanging baskets as a whole due to geographical constraints. Attached Figure Description

[0025] Figure 1 This is a top view of the on-site construction layout of the present invention;

[0026] Figure 2 This is a side view of the on-site construction layout of the present invention;

[0027] Figure 3 This is a schematic diagram of the anchoring system conversion;

[0028] Figure 4 This is a schematic diagram of the removal of the front upper crossbeam;

[0029] Figure 5 This is a schematic diagram of the dismantling of the middle gantry;

[0030] Figure 6 This is a diagram illustrating the dismantling of the diamond-shaped frame;

[0031] Figure 7 This is a diagram illustrating the removal of the tracks;

[0032] Figure 8 This is a schematic diagram of the removal of the inner mold;

[0033] Figure 9 This is a schematic diagram of the dismantling of the tensioning platform;

[0034] Figure 10 This is a schematic diagram of the removal of the outer guide beam;

[0035] Figure 11 This is a schematic diagram of the side formwork removal;

[0036] Figure 12 This is a schematic diagram of the removal of the bottom formwork;

[0037] Figure 13 This is a schematic diagram of the removal of the bottom longitudinal beam;

[0038] Figure 14 This is a schematic diagram of the removal of the guide beam;

[0039] Figure 15 This is a schematic diagram of the partial removal of the bottom support beam;

[0040] Figure 16 This is a schematic diagram of the complete removal of the bottom support beam.

[0041] In the diagram: 1. Truck crane; 2. Hanging basket; 3. Closing section; 4. Diamond frame; 5. Side formwork; 6. Front upper crossbeam; 7. Middle gantry; 8. Inner formwork; 9. Track; 10. Pulley; 11. Outer guide beam; 12. Precision rolled threaded steel; 13. Bottom longitudinal beam; 14. Bottom formwork; 15. Bottom support beam; 16. Traveling guide beam; 17. Tensioning platform; 18. Guy rope; 19. Concrete main beam; 20. Wire rope protection device; 21. No. 2 winch; 22. Hand chain hoist; 23. No. 1 winch. Detailed Implementation

[0042] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0043] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0044] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0045] Example 1

[0046] This embodiment provides a construction method for dismantling a diamond-shaped hanging basket, including the following steps:

[0047] Step 1) Replace the lifting rods and slings connecting the upper front crossbeam 6 of the hanging basket 2 to the bottom basket with precision rolled threaded steel bars 12, anchor the bottom basket system to the concrete main beam 19, and lower the bottom basket and side formwork 5 to a certain height;

[0048] Step 2) Disassemble the upper structure and inner mold 8 of the hanging basket 2. The upper structure includes the front upper crossbeam 6, the middle gate frame 7, the diamond frame 4, and the track 9.

[0049] The dismantling sequence is as follows: front upper crossbeam 6 → middle gantry 7 → diamond frame 4 → track → inner formwork 8;

[0050] Step 3) The lower structure of the hanging basket 2 is disassembled using the aerial dismantling method. The lower structure includes a tensioning platform 17, an outer guide beam 11, a side formwork 5, a bottom formwork 14, a bottom longitudinal beam 13, a traveling guide beam 16, and a bottom support beam 15.

[0051] The dismantling sequence is as follows: tensioning platform 17 → outer guide beam 11 → side formwork 5 → bottom formwork 14 → bottom longitudinal beam 13 → traveling guide beam 16 → bottom support beam 15.

[0052] Taking the removal of the mid-span rhomboid hanging basket 2 as an example, after the completion of the closure section 3, the anchoring system of hanging basket 2 is first converted, such as... Figure 3 As shown, the bottom basket system is anchored to the concrete main beam 19 using φ32mm precision-rolled threaded steel bars 12, replacing the original hanging rods and straps connecting the front upper crossbeam 6 to the bottom basket, and severing the connection between the upper and lower parts of the hanging basket 2; the side formwork 5 is fixed to the bottom basket, and the bottom basket is lowered to a certain height using jacks. See the construction layout diagram. Figure 1 and Figure 2As shown, the structure above the bridge deck was dismantled using a truck crane 1, while the structure below the bridge deck was dismantled using an aerial dismantling method.

[0053] This invention solves the problem of high economic costs and long cycle caused by the inability to directly lower the rhomboid hanging basket 2 as a whole due to geographical factors.

[0054] Example 2

[0055] Based on Example 1, this example provides a construction method for dismantling a diamond-shaped hanging basket. The dismantling process of the front upper crossbeam 6 in step 2) is as follows: first, attach a steel wire rope from a truck crane 1 to the segment of the front upper crossbeam 6 to be dismantled; then, disassemble the connecting bolts; next, use the truck crane 1 to lift the disassembled components to the bridge deck; repeat this process until the front upper crossbeam 6 is completely dismantled. Figure 4 As shown;

[0056] The dismantling process of the middle gantry 7 described in step 2) is as follows: The diamond-shaped frame 4 of the hanging basket 2 is fixed using guy ropes 18. The middle gantry 7 is dismantled in sections, following the principle of dismantling from both sides first, then from the middle. Figure 5 As shown.

[0057] Example 3

[0058] Based on Example 1, this example provides a construction method for dismantling a diamond-shaped hanging basket. The dismantling process of the diamond frame 4 in step 2) is as follows: connect the steel wire rope of the truck crane 1 to the diamond frame 4; after the steel wire rope is under tension, release the constraints of the rear anchor rod and guy rope 18 on the diamond frame 4; after the individual diamond frame 4 is laid down as a whole, dismantle each component of the diamond frame 4 step by step; such as... Figure 6 As shown.

[0059] The removal process of the track described in step 2) is as follows: use a truck crane 1 to dismantle track 9, and then move the pad beam;

[0060] Track 9 and support beams are installed manually in conjunction with truck crane 1. Support beams are moved manually, while tracks are disassembled using truck crane 1. Figure 7 As shown.

[0061] The removal process of the inner mold 8 described in step 2) is as follows: First, the inner mold 8 is disassembled manually. After disassembly, the formwork is removed from the pre-drilled hole at the top of the concrete main beam 19 using a truck crane 1. Figure 8 As shown.

[0062] Example 4

[0063] Based on Example 1, this example provides a construction method for dismantling a diamond-shaped hanging basket. The dismantling process of the tensioning platform 17 in step 3) is as follows: First, four hand-operated hoists 22 are set up in the beam body to connect the bottom support beam 15. Then, winches 1# 23 and 2# 21 are installed at the reserved positions on the concrete main beam 19. Then, wire rope protection devices 20 are installed on the outer edge of the beam wing plate. Finally, the aerial dismantling method is used for dismantling.

[0064] like Figure 9 As shown, before construction, four hand-operated hoists 22 were installed inside the beam to connect to the bottom support beam 15, preventing large swaying of the lower structure during dismantling. A wire rope protection device 20 was installed on the outer edge of the beam's flange to prevent damage to the appearance of the concrete main beam 19 during hoisting. The tensioning platform 17 was dismantled using an aerial dismantling method; first, the wire rope of winch #2 was connected to the bottom of the tensioning platform, and the wire rope of the truck crane 1 was connected to the top of the tensioning platform 17. Then, the connection to the side formwork 5 was cut off, and the truck crane 1 lifted it to the bridge deck. Winch #2 21 primarily controlled the attitude of the tensioning platform 17 in the air to prevent large swings; the truck crane's rope winding speed had to be slower than the winch's rope unwinding speed.

[0065] Example 5

[0066] Based on Example 1, this example provides a construction method for dismantling a diamond-shaped hanging basket, such as... Figure 10 As shown, the outer guide beam 11 described in step 3) is dismantled one by one. The specific process is as follows: connect the steel wire rope of the truck crane to the outer guide beam 11, then use a temporary hand chain hoist (the temporary hand chain hoist is removed after the outer guide beam is dismantled) to lower the outer guide beam 11, lift the steel wire rope of the truck crane 1, and after the outer guide beam 11 is pulled out of the projection area of ​​the concrete main beam 19, release the constraint of the temporary hand chain hoist and use the truck crane 1 to lift it to the bridge deck.

[0067] Use a temporary chain hoist to slowly lower the outer guide beam 11 to prevent excessive shaking.

[0068] Example 6

[0069] Based on Example 1, this example provides a construction method for dismantling a diamond-shaped hanging basket, such as... Figure 11 As shown, in step 3), the side formwork 5 wing plate and web plate are dismantled in stages. The specific dismantling method is as follows: first, install winch 1 and winch 2 and truck crane 1 wire rope on the side formwork to be hoisted, and then disconnect the wing plate template and web plate template from the bottom bolt connection of the rounded chamfer. The winch and truck crane 1 are used to hoist the template to the bridge deck.

[0070] Among them, the wire rope of winch 21 is installed at the bottom of the side formwork 5, and the wire rope of winch 23 is installed in the upper middle part of the side formwork 5. Winch 23 controls the side formwork 5 to be lifted, while winch 21 controls the side formwork 5 to gradually become vertical. When the wire rope of winch 23 is horizontal, the side formwork 5 is completely vertical. Then, the truck crane lifts the side formwork 5 to the bridge deck. This process is repeated until the side formwork 5 is completely dismantled.

[0071] Example 7

[0072] Based on Example 1, this example provides a construction method for dismantling a diamond-shaped hanging basket, such as... Figure 12 As shown, the dismantling process of the bottom formwork 14 in step 3) is as follows: First, the bottom formwork 14 is divided into small templates according to the assembly blocks. At the same time, the No. 2 winch is moved to another reserved position and installed, and pulleys 10 are installed on the concrete main beam 19. Then, a truck crane and the wire rope of the No. 1 winch are installed on the outside of the small templates. The wire rope of the No. 2 winch 21 is installed on the inside. The No. 1 winch 23 slowly pulls the rope to pull the small template out of the projection area of ​​the concrete main beam 19 and gradually raises the height. At the same time, the No. 2 winch 21 controls the small template to gradually make it vertical. When the wire rope of the No. 1 winch 23 is horizontal, the small template is completely vertical. Then, the truck crane 1 lifts it to the bridge deck. This step is repeated until the bottom formwork 14 is completely dismantled.

[0073] Once the bottom formwork 14 is completely vertical, use the truck crane 1 to lift it to the top surface of the concrete main beam 19. When the wire ropes of winches 1 and 2 are on the top surface of the concrete main beam 19, they are released from the small formwork. The wire ropes of winches 1 and 2 are connected with rope clamps. Winch 21 takes in the rope, and winch 1 23 releases the rope, thus transferring the rope ends to the small formwork to be hoisted. At this point, a circulation system will be formed.

[0074] Example 8

[0075] Based on Example 1, this example provides a construction method for dismantling a diamond-shaped hanging basket, such as... Figure 13 As shown, in step 3), the bottom longitudinal beams 13 are dismantled one by one. The specific process is as follows: two winches work together to pull the bottom longitudinal beams 13 out of the projection area of ​​the concrete main beam 19, while controlling its aerial posture to make it vertical. Then, the truck crane 1 lifts it to the bridge deck. Among them, two bottom longitudinal beams 13 are left on the two longer bottom support beams 15 without being dismantled. The two longer bottom support beams 15 are the two longer sections on the front bottom support beam and the two longer sections on the rear bottom support beam.

[0076] When removing the bottom longitudinal beam 13, leave 4 bottom longitudinal beams 13 unremoved as stable components when the bottom support beam 15 is finally removed as a whole.

[0077] Example 9

[0078] Based on Example 1, this example provides a construction method for dismantling a diamond-shaped hanging basket. In step 3), the bottom support beam 15 is dismantled using a partial-to-overall approach. Specifically, the shorter section of the bottom support beam 15 is first separated from the whole structure. Figure 15 As shown, the winches (winch 1 and winch 2) are then used in conjunction with the truck crane 1 to lift the beam to the bridge deck, and the connection between the hand-operated hoist 22 and the bottom support beam 15 is released. Then, the two longer sections of the front and rear bottom support beams are unfastened at the bolted joints, so that the front and rear bottom support beams and the bottom longitudinal beam 13 form a "well" shape. A "well" shaped beam is then hoisted as a whole using winch 21 and the truck crane 1, as shown. Figure 16 As shown, the demolition was carried out in sections and phased out.

[0079] The guide beam 16 was also dismantled using an aerial dismantling method, similar to the dismantling of the bottom longitudinal beam 13. Figure 14 As shown.

[0080] This invention employs an aerial dismantling method, which involves using a truck crane 1 to dismantle the upper structure of the hanging basket 2, then using multiple lifting devices in coordination to dismantle the lower components of the hanging basket 2 in the air. A winch 21 is then used to swing the lower components out of the projection area of ​​the main beam 19, and finally, the truck crane 1 lifts them to the bridge deck. This solves the problem of high economic costs and long timelines associated with the inability to directly lower the diamond-shaped hanging basket 2 as a whole due to geographical factors.

[0081] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A construction method for dismantling a rhombic hanging basket, characterized by, Comprising the following steps: Step 1) replace the hanging basket front upper crossbeam and the hanger rod and hanger belt connected with the bottom basket with finished rolling threaded steel, anchor the bottom basket system on the concrete main beam, and lower the bottom basket and side mold by a certain height; Step 2) disassemble the upper structure and inner mold of the hanging basket, the upper structure comprising a front upper crossbeam, a middle portal, a diamond frame, and a track; The disassembly sequence is: front upper crossbeam → middle portal → diamond frame → track → inner mold; The disassembly process of the front upper crossbeam is: first tie the automobile hoist steel wire rope on the front upper crossbeam segment to be disassembled, then disassemble the connecting bolts, then use the automobile hoist to hoist the disassembled components to the bridge deck, and repeat this step until the front upper crossbeam is disassembled; The disassembly process of the middle portal is: use the cable wind rope to fix the hanging basket diamond frame, and disassemble the middle portal in blocks following the principle of disassembling the two sides first and then the middle; The disassembly process of the diamond frame is: connect the automobile hoist steel wire rope with the diamond frame, then release the constraints of the rear anchor rod and the cable wind rope on the diamond frame after the steel wire rope is stressed; after the single diamond frame is completely laid down, disassemble the diamond frame components one by one; The disassembly process of the track is: use the automobile hoist to disassemble the track, and then transport the cushion beam; The disassembly process of the inner mold is: first manually disassemble the inner mold in the box, and then use the automobile hoist to take out the formwork from the reserved hole at the top of the concrete main beam after disassembly is completed; Step 3) disassemble the lower structure of the hanging basket using the air disassembly method, the lower structure comprising a tensioning platform, an outer guide beam, a side mold, a bottom mold, a bottom longitudinal beam, a walking guide beam, and a bottom support beam; The disassembly process of the tensioning platform is: first set 4 hand-operated hoists to connect the bottom support beam in the beam body, install a 1# winch and a 2# winch at the reserved position of the concrete main beam, then install a steel wire rope protection device on the outer edge of the beam body wing plate, and finally disassemble using the air disassembly method; The disassembly process of the bottom mold is: first divide the bottom mold into small block templates according to the assembly, and at the same time, move the 2# winch to another reserved position for installation and install a pulley on the concrete main beam; then install the automobile hoist, 1# winch steel wire rope outside the small block templates; install the 2# winch steel wire rope inside; slowly wind the small block templates out of the projection area of the concrete main beam and gradually raise the height by the 1# winch, while the 2# winch controls the small block templates to gradually become vertical; when the 1# winch steel wire rope is horizontal, the small block templates are completely vertical, and then use the automobile hoist to transport them to the bridge deck; repeat this step until the bottom mold is disassembled; The disassembly sequence is: tensioning platform → outer guide beam → side mold → bottom mold → bottom longitudinal beam → walking guide beam → bottom support beam.

2. The construction method for dismantling a rhombic hanging basket according to claim 1, wherein The outer guide beam in Step 3) is disassembled in a root-by-root manner, the specific process being: connect the automobile hoist steel wire rope with the outer guide beam, then lower the outer guide beam using the temporary hand-operated hoist, raise the automobile hoist steel wire rope, and after the outer guide beam is pulled out of the projection area of the concrete main beam, release the constraints of the temporary hand-operated hoist, and use the automobile hoist to lift it to the bridge deck.

3. The construction method for dismantling a rhombic hanging basket according to claim 1, wherein The side mold in Step 3) is disassembled in a wing plate and web step-by-step manner, the specific disassembly method being: first install a 1# winch, a 2# winch, and an automobile hoist steel wire rope on the side mold to be hoisted, then disconnect the wing plate template and the web template from the circular arc chamfer bottom bolt connection, and hoist them to the bridge deck by the winch in cooperation with the automobile hoist; Wherein, 2# hoist steel wire rope is installed in the side mold bottom, 1# hoist steel wire rope is installed in the side mold upper part; By 1# hoist control will side mold lift, simultaneously 2# hoist control side mold makes it gradually vertical, when 1# hoist steel wire rope is horizontal, side mold is completely in vertical state, again by car hoist will side mold be transported to the bridge; Cycle this step until side mold dismantling is completed.

4. The construction method for dismantling a rhombic hanging basket according to claim 1, wherein The bottom longitudinal beam in step 3 is dismantled by root, and the specific process is that two hoists are used to pull out the bottom longitudinal beam from the beam bottom area, and the aerial posture is controlled to make it vertical, and then the car hoist is used to transport it to the bridge; Wherein, two bottom longitudinal beams are left on the longer two sections of the bottom support beam, and the longer two sections of the bottom support beam are respectively the longer two sections of the front bottom support beam and the longer two sections of the rear bottom support beam.

5. The construction method for dismantling a rhombic hanging basket according to claim 4, wherein The bottom support beam in step 3 is dismantled by first locally and then integrally, and the specific process is that the shorter section of the bottom support beam is separated from the whole, and then lifted to the bridge by the hoist in cooperation with the car hoist; Then, the two longer sections of the front bottom support beam and the rear bottom support beam are disconnected at the bolted part, so that the front bottom support beam and the rear bottom support beam form an "I" shape with the bottom longitudinal beam, and one "I" shaped beam is integrally hoisted by the hoist in cooperation with the car hoist, and is dismantled by section.

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