Construction method for tower crane to penetrate through basement top plate

Abstract

The invention relates to a construction method for a tower crane to penetrate through a basement roof, and belongs to the technical field of building foundation engineering. The construction method comprises the steps that a hole is reserved in the basement roof, the hole keeps away from a primary beam and a secondary beam of a basement, and a high ridge platform is additionally arranged on the peripheral side of the reserved hole; a tower crane is installed, and the tower crane penetrates out of the basement from the hole; after the tower crane is installed, a supporting assembly used for supporting the top plate is additionally arranged on the peripheral side of the hole; after tower crane construction is completed, the tower cranes are sequentially disassembled from top to bottom; after the tower crane is disassembled, a bottom die is arranged below the hole, the bottom die tightly abuts against the lower surface of the top plate, and a first fixing assembly used for supporting and fixing the bottom die is arranged below the bottom die; concrete pouring is conducted at the hole, and hole plugging is completed; after the concrete is solidified, a waterproof layer is laid above the basement top plate; and the supporting assembly, the first fixing assembly and the bottom die are disassembled. The tower crane mounting method has the effect of improving the tower crane mounting convenience.

Description

Technical Field

[0001] The present application relates to the technical field of building foundation engineering, and in particular to a construction method for a tower crane to penetrate a basement roof. Background Art

[0002] At present, high-cap tower cranes have been widely used in the construction field. For the construction of large foundation pits and multiple internal support projects, the amount of steel pipes, formworks, wooden blocks, steel bars and other materials that need to be transported for internal support construction is relatively large. However, relying on crawler cranes for transportation occupies a large area, requires many equipments and has low operating efficiency. Therefore, installing high-cap tower cranes can effectively solve the material transportation problem in the foundation pit support stage, greatly improve the construction progress and reduce construction costs.

[0003] The traditional tower crane installation method usually carries out foundation construction on the ground. The foundation is relatively stable and can withstand various forces generated by the tower crane during operation. However, foundation construction on the ground occupies a large construction space. For construction areas with limited space, it is inconvenient to install the tower crane. Summary of the invention

[0004] In order to improve the convenience of installing a tower crane, the present application provides a construction method for a tower crane to penetrate a basement roof.

[0005] The application provides a construction method for a tower crane to penetrate a basement roof using the following technical solution: A construction method for a tower crane to penetrate a basement top plate comprises the following steps: S1. Reserve holes on the top plate of the basement, avoid the main and secondary beams of the basement, and add high platforms around the reserved holes. The high platforms are located above the top plate of the basement; S2. Install the tower crane, which passes through the hole to get out of the basement; S3. After the tower crane is installed, a support assembly for supporting the top plate is added around the hole, and the support assembly is arranged below the top plate; S4. After the tower crane construction is completed, dismantle the tower crane from top to bottom; S5. After the tower crane is disassembled, a bottom mold is arranged below the hole, the bottom mold and the lower surface of the top plate are closely abutted, and a first fixing assembly for supporting and fixing the bottom mold is arranged below the bottom mold; S6. Pour concrete at the hole to seal the hole; S7. After the concrete solidifies, a waterproof layer is laid on top of the basement roof; S8, disassembling the support assembly, the first fixing assembly and the bottom mold.

[0006] By adopting the above technical scheme, firstly, a hole is reserved on the top plate of the basement for the tower crane to pass through, the hole avoids the main and secondary beams on the top plate of the basement, and the tower crane sections are built from the ground of the basement upward in sequence until the tower crane is completed, and then a support assembly for supporting the top plate is added on the side of the hole, one end of the support assembly is set on the ground of the basement, and the other end of the support assembly is abutted against the top plate to improve the bearing capacity of the top plate, and after the construction of the tower crane is completed, the tower crane is disassembled from top to bottom in sequence, and after the tower crane is disassembled, a bottom mold is set below the hole, and the bottom mold is fixed and supported by the first fixing assembly, and then concrete is poured from the top of the hole to the hole to close the hole, and after the concrete solidifies, a waterproof layer is laid on the upper surface of the top plate to prevent the top plate from leaking, and finally the support assembly, the first fixing assembly and the bottom mold are disassembled, and for construction areas with limited space, there is no need to carry out foundation construction on the ground, so that it is not easy to affect the installation of the tower crane in the limited construction area, thereby improving the convenience of tower crane installation.

[0007] Optionally, steel bars are reserved at the holes. Before erecting the tower crane, the reserved steel bars are bent upward or downward within the edge of the hole to avoid the tower crane sections. After the tower crane is dismantled, the bent reserved steel bars are bent back and the two steel bars are welded relative to each other.

[0008] By adopting the above technical solution, steel bars can withstand tensile force, while concrete has strong compressive strength. Adding steel bars to concrete can form a composite material. This material combines the advantages of steel bars and concrete, so that the overall structure can withstand a greater load, thereby reserving steel bars. There is no need to re-set the steel bars when filling the holes with concrete later, which provides convenience for the work of the staff.

[0009] Optionally, a water stop plate is fixedly provided on the high ridge platform.

[0010] By adopting the above technical solution, the high platform is added to install a water stop plate, and the water stop plate is used to prevent water above the top plate from flowing into the basement through the holes.

[0011] Optionally, the support assembly includes a support plate and a support rod. The support plate is horizontally arranged. There are multiple support rods, and the multiple support rods are evenly distributed below the support plate. A fixed plate is fixed to the upper end of the support rod. The fixed plate and the support plate are parallel. An adjustment assembly for adjusting the height of the support plate is arranged on the fixed plate.

[0012] By adopting the above technical solution, the support rod is moved, and the support rod drives the fixed plate and the support plate to move. After the support plate moves to the set position, the bottom end of the support rod abuts and is fixed to the ground of the basement, and the adjustment component is used to drive the support plate to move upward relative to the fixed plate, so that the lower surface of the support plate and the top plate are closely abutted, thereby achieving support for the top plate.

[0013] Optionally, the adjustment assembly includes a threaded sleeve and a first screw rod, and the threaded sleeve and the first screw rod are both provided in multiple and one-to-one correspondence. The bottom end of the threaded sleeve is rotatably connected to the upper surface of the fixed plate, the first screw rod and the threaded sleeve are threadedly connected, and the upper end of the first screw rod is fixedly connected to the support plate. A sprocket is fixedly provided on the threaded sleeve, and chains are provided on the outer sleeves of the multiple sprocket wheels.

[0014] By adopting the above technical solution, a threaded sleeve is rotated, the threaded sleeve drives the sprocket to rotate, the sprocket drives the chain to rotate, the chain drives the remaining sprockets to rotate, and the sprocket drives the threaded sleeve to rotate, thereby realizing the synchronous rotation of the threaded sleeve. At the same time, under the guidance of the support plate, the threaded sleeve drives the first screw to move upward, and the first screw drives the support plate to move upward, so that the support plate and the top plate abut against each other, thereby the adjustment component realizes the adjustment of the height of the support plate.

[0015] Optionally, the base mold is hinged to one of the multiple support plates, and the first fixed component includes a sliding sleeve and a fixed rod. The sliding sleeve is mounted on a support rod below the support plate connected to the base mold, the sliding sleeve and the support rod are slidably connected, and a push sleeve is threadedly connected to the support rod, and the push sleeve is located below the sliding sleeve. One end of the fixed rod is hinged to the outer wall of the sliding sleeve, and the other end of the fixed rod is hinged to an end of the base mold away from the support plate.

[0016] By adopting the above technical solution, in the initial state, the bottom mold and the support plate are vertical, the push sleeve is rotated, the push sleeve moves upward relative to the support rod, the push sleeve pushes the sliding sleeve to move upward, the sliding sleeve drives the fixed rod to move, and the fixed rod drives the bottom mold to flip upward. When the bottom mold and the support plate are parallel, the bottom mold and the top plate are tightly abutted, and the bottom mold blocks the lower opening of the hole, so that the first fixed component supports and fixes the bottom mold.

[0017] Optionally, a support column is hinged under the bottom mold, a connecting groove is opened on the side of the bottom end of the support column away from the bottom mold, a thread is set on the side wall of the connecting groove of the support column, a second screw is threadedly connected to the thread at the support column, a base is fixed on the end of the second screw away from the support column, and a second fixing component that can be fixed and separated from the support column is set on one side of the support column.

[0018] By adopting the above technical solution, during the process of the bottom mold flipping upward, the bottom mold drives the support column to move. At the same time, the support column is affected by its own gravity, and the length direction of the support column is not easy to change. When the bottom mold and the top plate are abutted, the length direction of the support column is perpendicular to the bottom mold. The second fixing component fixes the support column, and the second screw is rotated. The second screw moves downward relative to the support column, and the second screw drives the base to move. The base and the base are closely abutted against the basement floor, thereby realizing the supporting effect of the support column on the bottom mold and improving the bearing capacity of the bottom mold.

[0019] Optionally, a fixed block is fixedly provided on the side of the base mold facing the support column, an avoidance groove is opened on the side of the fixed block facing away from the base mold, the avoidance groove passes through one side of the fixed block, an auxiliary plate is fixedly provided on one side of the support column, the auxiliary plate and the avoidance groove are snap-fitted together, a movable groove is opened on one side wall of the avoidance groove of the fixed block, the second fixed component includes a baffle and a pull rod, the baffle is arranged in the movable groove, the baffle and the fixed block are slidably connected, the pull rod is fixedly connected to the side of the baffle away from the avoidance groove, the end of the pull rod away from the baffle passes through the fixed block, and the pull rod and the fixed block are slidably connected.

[0020] By adopting the above technical solution, during the process of the bottom mold flipping upward, the bottom mold drives the fixed block to move, and as the auxiliary plate moves into the avoidance groove, the baffle moves toward the movable groove, and the baffle drives the pull rod to move. When the auxiliary plate moves into the avoidance groove, the pull rod pushes the baffle to move toward the avoidance groove, and the baffle drills the auxiliary plate, making it difficult for the auxiliary plate to move out of the avoidance groove, thereby completing the fixation of the support column.

[0021] Optionally, a pull plate is fixedly provided on the side of the pull rod away from the baffle, a spring is fixedly provided between the pull plate and the fixed block, and the spring is sleeved outside the pull rod.

[0022] By adopting the above technical solution, when the pull rod moves toward the direction away from the fixed block, the pull rod drives the pull plate to move and the spring is stretched. When the auxiliary plate is in the avoidance operation, the spring contracts, driving the pull plate to move toward the fixed block, the pull plate drives the pull rod to move, and the pull rod drives the baffle to move. There is no need for the staff to manually move the pull rod toward the fixed block, which provides convenience for the staff.

[0023] Optionally, a side of the baffle away from the pull rod is configured as an inclined surface.

[0024] By adopting the above technical solution, in the process of the auxiliary plate gradually moving into the avoidance groove, the auxiliary plate first contacts the inclined surface of the baffle plate and pushes the baffle plate to move toward the movable groove. The baffle plate drives the pull rod to move. In the process of fixing the support column, there is no need for the staff to manually pull the pull rod away from the fixed block, thereby providing convenience for the staff's work.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting a hole for the tower crane to pass through on the top plate of the basement, the tower crane can be built from the basement. For construction areas with limited space, there is no need to carry out foundation construction on the ground, so that the installation of the tower crane is not easily affected in the limited construction area, which improves the convenience of tower crane installation; 2. The supporting column supports the bottom mold, thus improving the bearing capacity of the bottom mold; 3. The support column is fixed by the second fixing assembly so that the support column is not easily moved at will during the process of supporting the bottom mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a cross-sectional view of the structure of the basement top plate in the embodiment of the present application; Figure 2 is a structural cross-sectional view showing the second fixing component in the embodiment of the present application; Figure 3 It is a structural cross-sectional view showing the connection groove in the embodiment of the present application.

[0027] In the figure, 1, top plate; 11, hole; 12, high ridge; 13, water stop plate; 2, support assembly; 21, support plate; 22, support rod; 221, push sleeve; 3, bottom mold; 4, first fixed assembly; 41, sliding sleeve; 42, fixed rod; 5, fixed plate; 51, sprocket; 52, chain; 6, adjustment assembly; 61, threaded sleeve; 62, first screw; 7, support column; 71, connecting groove; 72, second screw; 73, base; 74, auxiliary plate; 8, second fixed assembly; 81, baffle; 82, pull rod; 9, fixed block; 91, avoidance groove; 92, movable groove; 93, pull plate; 94, spring. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0029] The embodiment of the present application discloses a construction method for a tower crane to penetrate a basement roof.

[0030] refer to Figure 1 A construction method for a tower crane to penetrate a basement top plate comprises the following steps: S1. A hole 11 is reserved at the top plate 1 of the basement. The hole 11 avoids the position of the primary and secondary beams. The size of the hole 11 is 2300 mm long and 2100 mm wide. The hole 11 is rectangular. Steel bars are reserved at the hole 11. The reserved steel bars are bent upward or downward at the edge of the hole 11 to avoid the tower crane section. A high platform 12 with a width of 300 mm and a height of 350 mm is added around the hole 11. Two layers of steel bars are arranged in the high platform 12. The steel bars are arranged in two directions in a double-layer manner. A 3 mm thick water stop plate 13 is installed on the high platform 12. In the embodiment of the present application, the water stop plate 13 is made of steel. S2. Install a tower crane in the basement, and the tower crane passes through the basement through hole 11; S3, adding support components 2 for supporting the top plate 1 around the hole 11; S4. Place a sign prohibiting stacking of heavy objects above the hole 11, set up a guardrail, and hang a sign to prevent falling; S5. After the main construction is completed, dismantle the tower crane from top to bottom; S6. Adjust the bent reserved steel bars back to the original position, clean and remove rust with a wire brush, and weld the two corresponding steel bars at the same time; S7, a bottom mold 3 is arranged directly below the hole 11, the bottom mold 3 blocks the lower end opening of the hole 11, and a first fixing component 4 for fixing and supporting the bottom mold 3 is arranged below the bottom mold 3; S8, pouring concrete at the hole 11 to seal the hole 11. Before pouring concrete, clean the debris around the hole 11, the loose sand and gravel on the surface of the top plate 1, and the weak concrete layer. At the same time, add the washed and fully moistened chiseled surface to the concrete. Curing is carried out 12 hours after the concrete pouring is completed. The curing time is greater than or equal to 14 days. The concrete curing method adopts water curing; S9, laying a waterproof layer on the upper surface of the top plate 1; S10, dismantling the supporting assembly 2, the first fixing assembly 4 and the bottom mold 3, and recycling them.

[0031] refer to Figure 1 The support assembly 2 includes a support plate 21 and a support rod 22. The support plate 21 is horizontally arranged. A fixed plate 5 is arranged below the support plate 21. The fixed plate 5 and the support plate 21 are parallel. Four support rods 22 are arranged. The four support rods 22 are respectively distributed at the four corners of the fixed plate 5. The support rod 22 is below the fixed plate 5. The support rod 22 and the fixed plate 5 are perpendicular. The upper end of the support rod 22 is fixedly connected to the fixed plate 5. An adjustment assembly 6 for adjusting the height of the support plate 21 is arranged between the fixed plate 5 and the support plate 21.

[0032] The adjusting assembly 6 includes a threaded sleeve 61 and a first screw rod 62. There are four threaded sleeves 61 and four first screw rods 62, and they correspond to each other. The threaded sleeve 61 is rotatably connected to the upper surface of the fixed plate 5. The threaded sleeve 61 is perpendicular to the fixed plate 5. The first screw rod 62 is threadedly connected to the threaded sleeve 61. The upper end of the first screw rod 62 is fixedly connected to the support plate 21. Sprockets 51 are fixed on the threaded sleeves 61, and chains 52 are arranged on the outer sleeves of the four sprockets 51.

[0033] Move the support rod 22, and the support rod 22 drives the fixed plate 5 and the support plate 21 to move, so that the support plate 21 moves to the peripheral side of the hole 11, and the bottom end of the support rod 22 abuts and is fixed to the ground of the basement, and rotates a threaded sleeve 61, and the threaded sleeve 61 drives the sprocket 51 to rotate, and the sprocket 51 drives the chain 52 to rotate, and the chain 52 drives the remaining three sprockets 51 to rotate, and the sprocket 51 drives the threaded sleeve 61 to rotate, thereby realizing the synchronous rotation of the four threaded sleeves 61. At the same time, under the guidance of the support plate 21, the first screw 62 moves upward, and the first screw 62 drives the support plate 21 to move, so that the support plate 21 and the top plate 1 are closely abutted, so that the support assembly 2 realizes the supporting effect on the top plate 1 on the peripheral side of the hole 11.

[0034] refer to Figure 1 The bottom mold 3 is hinged to one of the four support plates 21, and the first fixed component 4 includes a sliding sleeve 41 and a fixed rod 42. Two sliding sleeves 41 and two fixed rods 42 are provided and correspond to each other. The two sliding sleeves 41 are respectively sleeved on the two support rods 22 below the support plate 21 hinged to the bottom mold 3. The sliding sleeve 41 and the support rod 22 are slidably connected. A push sleeve 221 is provided below the sliding sleeve 41. The push sleeve 221 is sleeved on the support rod 22 and is threadedly connected to the support rod 22. One end of the fixed rod 42 is hinged to the sliding sleeve 41, and the other end of the fixed rod 42 is hinged to the end of the bottom mold 3 away from the hinge.

[0035] When sealing the lower opening of the hole 11, rotate the push sleeve 221, the push sleeve 221 pushes the sliding sleeve 41 to move upward, the sliding sleeve 41 drives the fixed rod 42 to move, and the fixed rod 42 drives the bottom mold 3 to flip upward. When the bottom mold 3 is in a horizontal state, the bottom mold 3 completes the sealing of the lower opening of the hole 11, and at the same time, the side of the bottom mold 3 abuts against the lower surface of the top plate 1.

[0036] refer to Figure 1 , Figure 2 and Figure 3 A support column 7 is hingedly connected to the middle part of the side of the bottom mold 3 facing away from the top plate 1, and a connecting groove 71 is provided on the side of the support column 7 away from the fixed mold plate. The support column 7 is provided with a thread on the side wall of the connecting groove 71, and the support column 7 is threadedly connected with a second screw rod 72 at the connecting groove 71. A base 73 is fixed to the bottom end of the second screw rod 72, and the base 73 is perpendicular to the second screw rod 72. An auxiliary plate 74 is fixedly provided on one side of the upper end of the support column 7, and a fixing block 9 is fixedly provided on the side of the bottom mold 3 facing the support column 7. An avoidance groove 91 is provided on the side of the fixed block 9 facing away from the bottom mold 3, and the avoidance groove 91 runs through one side of the fixed block 9, the auxiliary plate 74 and the avoidance groove 91 are snap-fitted, and a second fixing component 8 for fixing the auxiliary plate 74 is provided at the fixed block 9.

[0037] The second fixed component 8 includes a baffle 81 and a pull rod 82. The fixed block 9 is provided with a movable groove 92 on one side wall of the avoidance groove 91. The baffle 81 is arranged at the movable groove 92. The baffle 81 and the fixed block 9 are slidably connected. The pull rod 82 is fixedly connected to the side of the baffle 81 away from the avoidance groove 91. The end of the pull rod 82 away from the baffle 81 passes through the fixed block 9. The pull rod 82 and the fixed block 9 are slidably connected. A pull plate 93 is fixedly provided at the end of the pull rod 82 away from the baffle 81. A spring 94 is fixedly provided between the pull plate 93 and the fixed block 9. The spring 94 is sleeved outside the pull rod 82. The side of the baffle 81 away from the pull rod 82 is set as an inclined surface.

[0038] In the process of the bottom mold 3 flipping upward, the bottom mold 3 drives the fixed block 9 and the support column 7 to move. The support column 7 is affected by its own gravity and the support column 7 remains in a vertical state. When the auxiliary plate 74 moves relative to the fixed block 9 toward the avoidance groove 91, the auxiliary plate 74 first contacts the inclined surface of the baffle 81 and squeezes the baffle 81 toward the movable groove 92. The baffle 81 drives the pull rod 82 to move, and the pull rod 82 drives the pull plate 93 to move, and the spring 94 is stretched. When the bottom mold 3 and the top plate 1 are in contact, the auxiliary plate 74 is in the avoidance groove 91 and above the baffle 81. The spring 94 contracts, driving the pull plate 93 to move. The plate 93 moves toward the fixed block 9, and the pull plate 93 drives the pull rod 82 to move, and the pull rod 82 pushes the baffle plate 81 to move. The end of the baffle plate 81 away from the pull rod 82 moves into the avoidance groove 91, and the baffle plate 81 blocks the auxiliary plate 74, making it difficult for the auxiliary plate 74 to move out of the avoidance groove 91, thereby achieving the fixation of the support column 7, rotating the base 73, and the base 73 drives the second screw 72 to rotate, and the second screw 72 moves downward. At the same time, the base 73 moves downward until the base 73 is tightly abutted against the basement floor, thereby achieving the supporting effect of the support column 7 on the bottom mold 3 and improving the bearing capacity of the bottom mold 3.

[0039] The implementation principle of a construction method for a tower crane to pass through a basement roof in an embodiment of the present application is as follows: a hole 11 is reserved at the basement roof 1 for the tower crane to pass through, so that the tower crane can be built from the basement and pass through the hole 11. After the main construction is completed, the tower crane is disassembled. After the tower crane is disassembled, a bottom form 3 is set directly below the hole 11, and the bottom form 3 is supported and fixed by a first fixing assembly 4. Concrete is poured on top of the bottom form 3 to complete the filling of the hole 11. After the concrete solidifies, a waterproof layer is laid on the upper surface of the roof 1 to complete the construction. For construction areas with limited space, there is no need to carry out foundation construction on the ground, so that it is not easy to affect the installation of the tower crane in the limited construction area, thereby improving the convenience of tower crane installation.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on 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 a tower crane to penetrate a basement roof, characterized in that: The following steps are involved: S1. A hole (11) is reserved at the top plate (1) of the basement, the hole (11) avoids the main and secondary beams of the basement, and a high platform (12) is added around the reserved hole (11), and the high platform (12) is located above the top plate (1) of the basement; S2, installing a tower crane, which passes through the basement through the hole (11); S3. After the tower crane is installed, a support assembly (2) for supporting the top plate (1) is added to the peripheral side of the hole (11), and the support assembly (2) is arranged below the top plate (1); S4. After the tower crane construction is completed, dismantle the tower crane from top to bottom; S5. After the tower crane is disassembled, a bottom mold (3) is arranged below the hole (11), the bottom mold (3) and the lower surface of the top plate (1) are in close contact, and a first fixing component (4) for supporting and fixing the bottom mold (3) is arranged below the bottom mold (3); S6, pouring concrete at the hole (11) to complete the plugging of the hole (11); S7. After the concrete solidifies, a waterproof layer is laid on the top slab of the basement (1); S8. Disassemble the support assembly (2), the first fixing assembly (4) and the bottom mold (3).

2. The construction method of a tower crane penetrating a basement roof according to claim 1 is characterized in that: Reinforcement bars are reserved at the holes (11). Before erecting the tower crane, the reserved reinforcement bars are bent upward or downward within the edge of the holes (11) to avoid the tower crane joints. After disassembling the tower crane, the bent reserved reinforcement bars are bent back and two reinforcement bars are welded relative to each other.

3. The construction method of a tower crane penetrating a basement roof according to claim 1 is characterized in that: A water stop plate (13) is fixedly provided on the high ridge platform (12).

4. The construction method of a tower crane penetrating a basement roof according to claim 1 is characterized in that: The support assembly (2) comprises a support plate (21) and a support rod (22); the support plate (21) is arranged horizontally; a plurality of support rods (22) are arranged; the plurality of support rods (22) are evenly distributed below the support plate (21); a fixing plate (5) is fixedly arranged at the upper end of the support rod (22); the fixing plate (5) and the support plate (21) are parallel; and an adjustment assembly (6) for adjusting the height of the support plate (21) is arranged on the fixing plate (5).

5. The construction method of a tower crane passing through a basement roof according to claim 4 is characterized in that: The adjusting assembly (6) comprises a threaded sleeve (61) and a first screw rod (62), the threaded sleeve (61) and the first screw rod (62) are provided in multiple numbers and correspond to each other, the bottom end of the threaded sleeve (61) is rotatably connected to the upper surface of the fixing plate (5), the first screw rod (62) and the threaded sleeve (61) are threadedly connected, the upper end of the first screw rod (62) is fixedly connected to the support plate (21), the threaded sleeve (61) is fixedly provided with a sprocket (51), and the outer shells of the multiple sprockets (51) are provided with chains (52).

6. The construction method of a tower crane penetrating a basement roof according to claim 4 is characterized in that: The bottom mold (3) is hinged to one of the plurality of support plates (21); the first fixing assembly (4) comprises a sliding sleeve (41) and a fixing rod (42); the sliding sleeve (41) is sleeved on a supporting rod (22) below the supporting plate (21) connected to the bottom mold (3); the sliding sleeve (41) and the supporting rod (22) are slidably connected; a pushing sleeve (221) is threadedly connected to the supporting rod (22); the pushing sleeve (221) is located below the sliding sleeve (41); one end of the fixing rod (42) is hinged to the outer wall of the sliding sleeve (41); and the other end of the fixing rod (42) is hinged to one end of the bottom mold (3) away from the supporting plate (21).

7. The construction method of a tower crane penetrating a basement roof according to claim 6, characterized in that: A support column (7) is hingedly connected below the bottom mold (3); a connection groove (71) is provided on the side of the bottom end of the support column (7) away from the bottom mold (3); a thread is provided on the side wall of the connection groove (71) of the support column (7); a second screw rod (72) is threadedly connected to the thread of the support column (7); a base (73) is fixedly provided on the end of the second screw rod (72) away from the support column (7); and a second fixing component (8) that can be fixed and separated from the support column (7) is provided on one side of the support column (7).

8. The construction method of a tower crane penetrating a basement roof according to claim 7, characterized in that: A fixed block (9) is fixedly provided on the side of the bottom mold (3) facing the support column (7), and an avoidance groove (91) is provided on the side of the fixed block (9) facing away from the bottom mold (3), and the avoidance groove (91) passes through one side of the fixed block (9). An auxiliary plate (74) is fixedly provided on one side of the support column (7), and the auxiliary plate (74) and the avoidance groove (91) are snap-fitted and matched. A movable groove (92) is provided on a side wall of the avoidance groove (91) of the fixed block (9), and the second fixed component (8) comprises a baffle plate (81) and a pull rod (82), and the baffle plate (81) is provided with a movable groove (92), the baffle plate (81) and the fixed block (9) are slidably connected, the pull rod (82) and the side of the baffle plate (81) away from the avoidance groove (91) are fixedly connected, and the end of the pull rod (82) away from the baffle plate (81) passes through the fixed block (9), and the pull rod (82) and the fixed block (9) are slidably connected.

9. A construction method for a tower crane to penetrate a basement roof according to claim 8, characterized in that: A pull plate (93) is fixedly provided on one side of the pull rod (82) away from the baffle (81), a spring (94) is fixedly provided between the pull plate (93) and the fixed block (9), and the spring (94) is sleeved outside the pull rod (82).

10. A construction method for a tower crane to penetrate a basement roof according to claim 9, characterized in that: The side of the baffle (81) away from the pull rod (82) is arranged as an inclined surface.

Images