Tower crane installation structure for deep foundation pit

Abstract

The application relates to the technical field of tower machine structures, improves the problem that an operator needs to support a standard section for alignment in the prior art positioning, and discloses a tower machine installation structure for deep foundation pits, which comprises a plurality of connecting pieces, a positioning frame, a correction assembly and a fixing piece, the positioning frame is connected to one end of a standard section close to the ground through the connecting pieces, the connecting pieces comprise sliding rods, supporting rods and sliding sleeves, the sliding sleeves are vertically arranged on the outer wall of the standard section in a circumferential array, the sliding rods are slidingly connected in the corresponding sliding sleeves, one end of the supporting rods is hinged to the corresponding sliding rods, the other end is hinged to the positioning frame, the supporting rods can slide into the sliding sleeves along the sliding rods, the inner diameter of the positioning frame is larger than the extension surface of the outer wall of the standard section, and the correction assembly is arranged in the positioning frame. The application can provide an installation structure which is free from manual support of the standard section for corresponding alignment, so as to increase project efficiency and guarantee the personal safety of the operator.

Description

Technical Field

[0001] This application relates to the technical field of tower crane structures, and in particular to a tower crane installation structure for deep foundation pits. Background Technology

[0002] A tower crane, also known as a tower hoist, is a rotating crane with its boom mounted on a tall tower. It offers a large working space and is primarily used for the vertical and horizontal transport of materials and the installation of building components during construction.

[0003] Existing tower cranes consist of three parts: the metal structure, the working mechanism, and the electrical system. The metal structure includes the tower body, jib, base, and anchor rods. The working mechanism comprises four parts: hoisting, luffing, slewing, and traveling. The electrical system includes motors, controllers, distribution cabinets, connecting lines, signaling, and lighting devices. The specific installation steps for a tower crane are as follows: 1. Construct the foundation according to design requirements, setting up the pad and base. 2. Install the outriggers and the first standard section on the base and secure them with a bracket. 3. Install the jib root and operator's cab. 4. Install the jib midsection and lifting cylinder. 5. Install the jib tip and luffing trolley. 6. Install the counterweight jib root and slewing mechanism. 7. Install the counterweight jib midsection and counterweight frame. 8. Install the counterweight jib tip and counterweight. 9. Install the tower top, winch, distribution cabinet, and other electrical equipment. 10. Connect various cables, signal lines, hydraulic pipes, etc. 11. Check that all connections are secure, all limit switches are effective, and all indicators are accurate. 12. Conduct a no-load test run to check that all actions are normal and all parameters meet the requirements. 13. Disconnect the connection between the support frame and the first standard section. Start the lifting cylinder to push the support frame and the upper part of the tower crane upwards. 14. Use the tower crane's own winch to lift the second standard section, which has been prepared on the ground, until it is level with the support frame. Then, insert the second standard section into the support frame and connect it to the first standard section. 15. Repeat steps 13 and 14 until all standard sections are installed and the required height is reached.

[0004] Regarding the aforementioned technologies, when a tower crane is installed in a deep foundation pit, the positioning of the standard sections becomes more difficult. It requires a crane to lift the standard sections to a suitable position and then lower them to the corresponding standard section location, where workers manually connect them, which is quite dangerous. Summary of the Invention

[0005] To address the shortcomings of existing technologies that require operators to support standard sections for alignment during positioning, this application provides a tower crane installation structure for deep foundation pits.

[0006] The following technical solution is adopted:

[0007] A tower crane installation structure for deep foundation pits, positioned between adjacent standard sections or between a standard section and a base, includes several connectors, a positioning frame, and a correction assembly. The positioning frame is connected to the ground-facing end of a standard section via the connectors. Each connector includes a sliding rod, a support rod, and a connecting sleeve. The connecting sleeves are vertically arranged in a circumferential array on the outer wall of the standard section. Several sliding rods are slidably connected to corresponding connecting sleeves. One end of each support rod is ball-jointed to a corresponding sliding rod, and the other end is ball-jointed to the positioning frame. The support rod can slide into the connecting sleeve along with the sliding rod. The inner diameter of the positioning frame is larger than the extended surface of the outer wall of the standard section. The correction assembly is disposed within the positioning frame. The correction assembly includes a fixed column, several positioning rods, and several positioning sleeves. The fixed column is vertically arranged within the positioning frame. The positioning sleeve has a fixed column extending outward from the positioning frame. One end of the positioning sleeve is arranged in a circular array perpendicular to the fixed column. One end of the positioning rod is slidably connected to the positioning sleeve, and the other end extends horizontally towards the inner wall of the positioning frame and is provided with an abutment block. An elastic element is provided between the positioning rod and the positioning sleeve to ensure that the positioning rod always has the ability to move in the direction of the extension surface of the inner wall of the positioning frame. Several support rods are vertically arranged at the end of the adjacent standard section or base near the positioning frame. After the abutment block moves with the positioning frame, it abuts against the corresponding support rod to cooperate with the elastic element to guide the positioning frame to align with the extension surface of the support rod. The sliding sleeve is provided with a first fixing member for fixing the sliding rod after the support rod enters the sliding rod. A second fixing member is provided on the outside of the positioning frame for fixing the support rod.

[0008] By adopting the above technical solution, the installation structure is divided into two parts. Several connectors, positioning frames, correction components, and fixing components are located at the bottom of the standard section to be assembled. Support rods are fixed to the end of the base away from the ground or to the end of the standard section already fixed to the base away from the ground. In use, the base is first fixed to the ground with concrete. A crane is then used to lift the standard section above the base, moving it downwards towards the base so that the positioning frames approach the base, and the correction components fall into the space enclosed by the support rods of the base. At this time, due to the action of the elastic element, the positioning rods move away from the positioning post, causing the abutment block to abut the support rod. The positioning rods, with the positioning post as the center, move in a circle due to the reaction of the elastic element. Under the force, the positioning frame is moved to a position corresponding to the center of the base or standard section. At this time, the relative position of the positioning frame and the standard section to be installed can be observed from the crane cab. Adjust the standard section to be installed and the positioning frame to be in a vertical state, and gradually lower the standard section to be installed so that the support rod is inserted into the sliding sleeve. At this time, the standard section to be installed and the base or fixed standard section are on the same straight line. After the standard section to be installed is stably placed on the base or fixed standard section, the structure is fixed by the first and second fixing parts to complete the installation. In this way, an installation structure is provided that eliminates the need for operators to manually support the standard section for calibration, thereby increasing project efficiency and ensuring the personal safety of operators.

[0009] Optionally, the inner wall of the positioning frame is provided with several support sleeves at positions corresponding to the support rod, and the support rod can be inserted into the support sleeve from bottom to top.

[0010] By adopting the above technical solution, the cooperation between the support sleeve and the support rod provides pre-fixation when the standard section to be installed abuts against the base or when the standard section is fixed, so as to facilitate the application of subsequent reinforcement measures.

[0011] Optionally, the second fixing member can be sequentially passed through the positioning frame and the support sleeve into the support rod. The second fixing member is a bolt, and the support rod is provided with threads corresponding to the second fixing member.

[0012] By adopting the above technical solution, the support rod is connected to the support sleeve through the second fastener to fix the standard section to be installed.

[0013] Optionally, the fixed column is circumferentially slidably connected with a plurality of limiting blocks corresponding to the positioning sleeve. The limiting blocks can move along the length direction of the positioning sleeve to abut one end of the positioning rod. The fixed column is provided with a driving component for driving the limiting blocks to move.

[0014] By adopting the above technical solution, after the support rod of the standard section to be installed is connected to the support sleeve, the sliding limit block abuts against the positioning rod to restrict the movement of the positioning rod, and pushes the abutting block to abut against the support rod to provide additional restriction on the standard section to be installed, thereby increasing the stability of the overall structure.

[0015] Optionally, the fixed column has an installation groove along its axis, and the driving assembly includes a screw, a sliding sleeve, and several push rods. The screw is rotatably connected to the fixed column through the installation groove, and the screw passes through the sliding sleeve. The sliding sleeve is threadedly connected to the screw. The fixed column has several first clearance grooves arranged vertically in a circumferential direction. The first clearance grooves communicate with the installation groove. Several positioning sleeves each have a second clearance groove corresponding to the first clearance groove. One end of the push rod is hinged to the sliding sleeve, and the other end passes through the first clearance groove and the second clearance groove in sequence and is hinged to the limiting block.

[0016] By adopting the above technical solution, rotating the screw drives the sliding sleeve to move along the length of the screw, thereby driving the limiting block to move through the push rod. The limiting block moves away from the fixed column and pushes the abutment block of the positioning rod to abut the support rod. Since the screw and the sliding sleeve are self-locking, this provides stable support for the support rod. At the same time, the first clearance groove also provides a limit for the sliding sleeve, preventing the sliding sleeve from rotating, so that the sliding sleeve only moves along the length of the screw.

[0017] Optionally, the abutment block has an abutment groove at one end near the inner wall of the positioning frame for abutting the support rod, and the abutment groove is an inwardly concave arc shape.

[0018] By adopting the above technical solution, the abutment groove provides a relative function when abutting the support rod, so as to provide a small-amplitude rotation guide for the positioning frame to adjust the relative position of the positioning frame and the support rod; at the same time, after the positioning rod is restricted by the limiting block, the setting of the abutment groove will make the contact area between the abutment block and the support rod as large as possible, so as to provide more stable support for the positioning frame and the support rod.

[0019] Optionally, the abutment block has a chamfer on the side closest to the ground for abutting the support rod.

[0020] By adopting the above technical solution, when the abutment block abuts the support rod from top to bottom, the chamfer is used to reduce the relative resistance experienced by the abutment block, thereby improving the smoothness of the structure during installation.

[0021] Optionally, the outer wall of the connecting sleeve is provided with a screw hole, and the slide rod is provided with an opening corresponding to the screw hole, and the first fixing member can pass through the screw hole into the opening.

[0022] By adopting the above technical solution, the sliding sleeve and the support rod are connected by the first fixing component, thereby restricting the movement of the positioning frame and providing a more stable installation method.

[0023] Optionally, the end of the screw away from the positioning sleeve passes through the fixing post and is provided with an end block that facilitates rotation of the screw by hand.

[0024] In summary, this application includes at least one of the following beneficial effects:

[0025] 1. To provide an installation structure that eliminates the need for workers to manually support and calibrate standard sections, thereby increasing project efficiency and ensuring the personal safety of workers;

[0026] 2. The standard section to be installed is reinforced and connected by the first and second fasteners to improve the stability of the structural installation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure in this embodiment before installation;

[0028] Figure 2 This is a schematic diagram of the structure after installation in this example;

[0029] Figure 3 This is a cross-sectional structural diagram of the connection point in this embodiment;

[0030] Figure 4 This is a schematic diagram of the calibration component structure;

[0031] Figure 5 This is a schematic diagram of the driver component structure.

[0032] Explanation of reference numerals in the attached drawings: 1. Standard section to be installed; 11. First fixing component; 2. Connecting component; 21. Slide rod; 211. Anti-detachment block; 22. Support rod; 23. Connecting sleeve; 231. Screw hole; 3. Positioning frame; 31. Support sleeve; 4. Correction assembly; 41. Fixing column; 411. Mounting groove; 412. First clearance groove; 42. Positioning rod; 421. Guide block; 43. Positioning sleeve; 431. Limiting groove; 432. Guide groove; 433. Second clearance groove; 44. Abutment block; 441. Abutment groove; 442. Chamfer; 45. Elastic component; 46. Limiting block; 5. Drive assembly; 51. Screw; 511. End block; 52. Slide sleeve; 53. Push rod; 6. Fixed standard section; 61. Support rod; 62. Second fixing component. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 To be continued Figure 5 This application will be described in further detail.

[0034] Reference Figures 1 to 3This application discloses a tower crane installation structure for deep foundation pits. To distinguish different standard sections, the standard section lifted by the crane is referred to as the standard section to be installed 1, and the standard section with the fixed target is referred to as the fixed standard section 6. The installation structure is set between adjacent standard sections to be installed 1 and fixed standard sections 6, or between standard sections to be installed 1 and the base. It is installed on the corresponding structure during production to increase the stability of the standard sections during installation. Specifically, the installation structure includes two parts: first, a part set at the end of the standard section to be installed 1 near the ground, including several connectors 2, positioning frames 3, and correction components 4; second, a part set at the end of the fixed standard section 6 or the base away from the ground, including several vertically arranged support rods 61.

[0035] Reference Figures 3 to 5 Furthermore, the connecting component 2 includes a sliding rod 21, a support rod 22, and a connecting sleeve 23. Four connecting sleeves 23 are provided, arranged vertically in a circumferential array on the outer wall of the standard section 1 to be installed. The four sliding rods 21 are slidably connected to their respective connecting sleeves 23, and the end of each sliding rod 21 away from the ground has an anti-detachment block 211 with an outer diameter larger than the inner diameter of the connecting sleeve 23. The number and position of the support rods 22 correspond to those of the sliding rods 21. One end of the support rod 22 is ball-jointed to the corresponding sliding rod 21, and the other end is ball-jointed to the positioning frame 3. The inner diameter of the connecting sleeve 23 should be sufficient to accommodate the ball-joint joint entering the sleeve, allowing the support rod 22 to slide into the connecting sleeve 23 along with the sliding rod 21. The inner diameter of the positioning frame 3 is larger than the outer wall extension surface of the standard section, allowing the positioning frame 3 to easily frame all four support rods 61 within the positioning frame 3 when the crane lowers the standard section 1 to be installed onto the fixed standard section 6. The correction component 4 is disposed within the positioning frame 3. The correction component 4 includes a fixed post 41, four positioning rods 42, and four positioning sleeves 43. The fixed post 41 is vertically disposed in the middle of the positioning frame 3 and is connected to the positioning frame 3 by several reinforcing rods. The fixed post 41 extends outward from the positioning frame 3. The positioning sleeve 43 is a hollow rectangular tube. One end of the positioning sleeve 43 is arranged in a circular array and is perpendicular to the fixed post 41. The positioning rods 42 are rectangular rods. One end of the positioning rod 42 is slidably connected to the positioning sleeve 43 along the length direction of the positioning sleeve 43, and the other end extends horizontally towards the inner wall of the positioning frame 3 and is provided with an abutment block 44. An elastic element 45 is provided between the positioning rod 42 and the positioning sleeve 43 to ensure that the positioning rod 42 always has the ability to move in the direction of the extension surface of the inner wall of the positioning frame 3. The elastic element 45 is a spring. Preferably, to support the elastic element 45, the elastic element 45 is sleeved outside the positioning rod 42, and the two ends of the elastic element 45 are respectively connected to the positioning sleeve 43 and the abutment block 44. After the abutting block 44 moves with the positioning frame 3, it abuts against the corresponding support rod 61 to cooperate with the elastic element 45 to guide the positioning frame 3 to align with the extension surface of the support rod 61. The sliding sleeve 52 is provided with a first fixing element 11 for fixing the support rod 22 after it enters the sliding rod 21. The outer side of the positioning frame 3 is provided with a second fixing element 62 for fixing the support rod 61.

[0036] Reference Figures 3 to 5 Furthermore, the positioning frame 3 is a rectangular frame structure. Four support sleeves 31, corresponding to the support rod 61, are provided on the inner wall of the positioning frame 3. The support sleeves 31 are vertically positioned, with their openings facing the support rod 61 at the bottom. The lower surface of the support sleeve 31 is higher than the highest point of the abutment block 44 in the vertical direction. The support rod 61 can be inserted into the support sleeve 31 from bottom to top. The cooperation between the support sleeve 31 and the support rod 61 provides pre-fixation when the standard section 1 to be installed abuts the base or is fixed to the standard section 6, facilitating subsequent reinforcement. The second fixing member 62 can be sequentially inserted through the positioning frame 3 and the support sleeve 31 into the support rod 61. The second fixing member 62 is a bolt, and the support rod 61 has threads corresponding to the second fixing member 62. The support rod 61 is connected to the support sleeve 31 through the second fixing member 62 to fix the standard section 1 to be installed.

[0037] Reference Figures 3 to 5 The fixed column 41 is circumferentially slidably connected to four limiting blocks 46 corresponding to the positioning sleeve 43. The positioning sleeve 43 has a limiting groove 431 for the limiting blocks 46 to slide in, the limiting groove 431 being rectangular, and the limiting blocks 46 being corresponding rectangular rods. A guide block 421 is provided at one end of the positioning rod 42 near the limiting block 46, forming a T-shape with the positioning block. A guide groove 432 is adaptively provided within the positioning sleeve 43 for the guide block 421 to slide in. The guide groove 432, in conjunction with the guide block 421, prevents the positioning rod 42 from rotating or disengaging from the positioning sleeve 43. The limiting blocks 46 can move along the length of the positioning sleeve 43 to abut against one end of the positioning rod 42. The fixed column 41 is equipped with a drive assembly 5 for driving the movement of the limiting blocks 46. After the support rod 61 of the standard section 1 to be installed is connected to the support sleeve 31, the sliding limit block 46 abuts against the positioning rod 42 to restrict the movement of the positioning rod 42, and pushes the abutment block 44 to abut against the support rod 61 to provide additional restriction on the standard section 1 to be installed and increase the stability of the overall structure.

[0038] Reference Figures 3 to 5Furthermore, the fixed post 41 has a vertically formed mounting groove 411 along its axis. The drive assembly 5 includes a screw 51, a sliding sleeve 52, and several push rods 53. The screw 51 has a thread in the middle and smooth rods at both ends. The screw 51 is rotatably connected to the fixed post 41 through the mounting groove 411. Optionally, bearings can be added to increase the rotational stability of the screw 51. The screw 51 passes through the sliding sleeve 52, which is threadedly connected to the screw 51. The fixed post 41 has several first clearance grooves 412 arranged vertically in a circumferential direction. The first clearance grooves 412 communicate with the mounting groove 411. Several positioning sleeves 43 each have second clearance grooves 433 corresponding to the first clearance grooves 412. One end of the push rod 53 is hinged to the sliding sleeve 52, and the other end passes through the first clearance groove 412 and the second clearance groove 433 in sequence and is hinged to the limiting block 46. Rotating the screw 51 causes the sliding sleeve 52 to move along the length of the screw 51, thereby causing the limiting block 46 to move via the push rod 53. The limiting block 46 moves away from the fixed post 41 and pushes the abutment block 44 of the positioning rod 42 to abut against the support rod 61. Since the screw 51 and the sliding sleeve 52 are self-locking, they provide stable support for the support rod 61. At the same time, the first clearance groove 412 also provides a limit for the sliding sleeve 52, preventing the sliding sleeve 52 from rotating, so that the sliding sleeve 52 only moves along the length of the screw 51.

[0039] Reference Figures 3 to 5 The positioning rod 42 is arranged diagonally along the positioning frame 3. The width of the abutment block 44 should be at least 1.5 times greater than the diameter of the support rod 61 to facilitate the abutment block 44 abutting the support rod 61. An abutment groove 441 for abutting the support rod 61 is provided at one end of the abutment block 44 near the inner wall of the positioning frame 3. The abutment groove 441 is an inwardly concave arc shape. The space enclosed by the abutment groove 441 and the inner wall of the positioning block frame provides a tolerance space for the crane to control the docking of the support rod 61. The abutment groove 441 provides a relative function when abutting the support rod 61, providing a small-amplitude rotational guide for the positioning frame 3 to adjust the relative position of the positioning frame 3 and the support rod 61. Simultaneously, after the positioning rod 42 is restricted by the limiting block 46, the abutment groove 441 maximizes the contact area between the abutment block 44 and the support rod 61, providing more stable support for the positioning frame 3 and the support rod 61. The abutment block 44 has a chamfer 442 on the side closest to the ground for abutting the support rod 61. When the abutment block 44 abuts the support rod 61 from top to bottom, the chamfer 442 reduces the relative resistance experienced by the abutment block 44, thereby improving the smoothness of the structure during installation.

[0040] Reference Figures 3 to 5 The outer wall of the connecting sleeve 23 has a screw hole 231, and the slide rod 21 has an opening corresponding to the screw hole 231. The first fixing member 11 can pass through the screw hole 231 into the opening. The first fixing member 11 connects the slide sleeve 52 and the support rod 22, thereby restricting the movement of the positioning frame 3 and providing a more stable installation method.

[0041] Reference Figures 3 to 5 The end of the screw 51 away from the positioning sleeve 43 passes through the fixing post 41 and is provided with an end block 511 for easy rotation by hand. The end block 511 is cylindrical and has friction texture on its surface.

[0042] The implementation principle of a tower crane installation structure for a deep foundation pit according to an embodiment of this application is as follows:

[0043] In use, the base is first fixed to the ground with concrete. The standard section is then lifted above the base by a crane and brought down to the base so that the positioning frame 3 is close to the base and the correction component 4 falls into the space enclosed by the support rods 61 of the base.

[0044] At this time, due to the action of the elastic element 45, several positioning rods 42 move away from the positioning post, causing the abutting block 44 to abut against the support rod 61. With the positioning post as the center, the several positioning rods 42, under the reaction force of the elastic element 45, drive the positioning frame 3 to move to the position corresponding to the center of the base or standard section. This process is called pre-positioning.

[0045] At this time, the relative position of the positioning frame 3 and the standard section 1 to be installed can be observed from the crane cab. Adjust the standard section 1 to be installed and the positioning frame 3 to be in a vertical state, and gradually lower the standard section 1 to be installed so that the support rod 22 is inserted into the connecting sleeve 23. At this time, the standard section 1 to be installed and the base or fixed standard section are on the same straight line. After the standard section 1 to be installed is stably placed on the base or fixed standard section, the structure is fixed by the first fixing member 11 and the second fixing member 62 to complete the installation.

[0046] Therefore, an installation structure is provided that eliminates the need for operators to manually support and calibrate the standard sections, thereby increasing project efficiency and ensuring the personal safety of operators.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tower crane installation structure for deep foundation pits, characterized in that: Located between adjacent standard sections or between a standard section and a base, the system includes several connectors (2), a positioning frame (3), and a correction assembly (4). The positioning frame (3) is connected to the end of the standard section near the ground via several connectors (2). Each connector (2) includes a slide rod (21), a support rod (22), and a connecting sleeve (23). Several connecting sleeves (23) are vertically arranged in a circumferential array on the outer wall of the standard section. Several slide rods (21) are slidably connected to the corresponding connecting sleeves (23). Several support rods (22) are connected to the base. One end of the ball joint is connected to the slide rod (21), and the other end is connected to the positioning frame (3). The support rod (22) can slide into the connecting sleeve (23) along with the slide rod (21). The inner diameter of the positioning frame (3) is larger than the outer wall extension surface of the standard section. The correction component (4) is set inside the positioning frame (3). The correction component (4) includes a fixed column (41), several positioning rods (42) and several positioning sleeves (43). The fixed column (41) is vertically set in the middle of the positioning frame (3). The fixed column (41) extends towards the... The positioning frame (3) extends outward. One end of the positioning sleeve (43) is arranged in a circular array and perpendicular to the fixed column (41). One end of the positioning rod (42) is slidably connected in the positioning sleeve (43), and the other end extends horizontally towards the inner wall of the positioning frame (3) and is provided with an abutment block (44). An elastic element (45) is provided between the positioning rod (42) and the positioning sleeve (43) to ensure that the positioning rod (42) always has the ability to move in the direction of the extension surface of the inner wall of the positioning frame (3). An adjacent standard section or base is close to the positioning frame (3). A plurality of support rods (61) are vertically arranged at the end. The abutting block (44) abuts against the corresponding support rod (61) after the positioning frame (3) moves to cooperate with the elastic element (45) to guide the positioning frame (3) to align with the extension surface of the support rod (61). The connecting sleeve (23) is provided with a first fixing element (11) for fixing the slide rod (21) after the support rod (22) enters the slide rod (21). The outer side of the positioning frame (3) is provided with a second fixing element (62) for fixing the support rod (61).

2. The tower crane installation structure for a deep foundation pit according to claim 1, characterized in that: The inner wall of the positioning frame (3) is provided with several support sleeves (31) whose positions correspond to the support rod (61), and the support rod (61) can be inserted into the support sleeve (31) from bottom to top.

3. The tower crane installation structure for a deep foundation pit according to claim 2, characterized in that: The second fixing member (62) can be sequentially inserted through the positioning frame (3) and the support sleeve (31) into the support rod (61). The second fixing member (62) is a bolt, and the support rod (61) is provided with a thread corresponding to the second fixing member (62).

4. The tower crane installation structure for a deep foundation pit according to claim 1, characterized in that: The fixed column (41) is circumferentially slidably connected with a plurality of limiting blocks (46) corresponding to the positioning sleeve (43). The limiting blocks (46) can move along the length direction of the positioning sleeve (43) to abut one end of the positioning rod (42). The fixed column (41) is provided with a driving component (5) for driving the limiting blocks (46) to move.

5. The tower crane installation structure for a deep foundation pit according to claim 4, characterized in that: The fixed column (41) has an installation groove (411) along its axis. The drive assembly (5) includes a screw (51), a sliding sleeve (52), and several push rods (53). The screw (51) is rotatably connected to the fixed column (41) through the installation groove (411). The screw (51) passes through the sliding sleeve (52). The sliding sleeve (52) is threadedly connected to the screw (51). The fixed column (41) has several first clearance grooves (412) arranged vertically in the circumferential direction. The first clearance grooves (412) are connected to the installation groove (411). Several positioning sleeves (43) are provided with second clearance grooves (433) corresponding to the first clearance grooves (412). One end of the push rod (53) is hinged to the sliding sleeve (52), and the other end passes through the first clearance groove (412) and the second clearance groove (433) in sequence and is hinged to the limiting block (46).

6. The tower crane installation structure for a deep foundation pit according to claim 1, characterized in that: The abutment block (44) has an abutment groove (441) for abutting the support rod (61) at one end near the inner wall of the positioning frame (3). The abutment groove (441) is an inwardly concave arc shape.

7. The tower crane installation structure for a deep foundation pit according to claim 6, characterized in that: The abutment block (44) has a chamfer (442) on the side near the ground for abutting the support rod (61).

8. The tower crane installation structure for a deep foundation pit according to claim 5, characterized in that: The outer wall of the connecting sleeve (23) is provided with a screw hole (231), and the slide rod (21) is provided with an opening corresponding to the screw hole (231). The first fixing member (11) can pass through the screw hole (231) into the opening.

9. The tower crane installation structure for a deep foundation pit according to claim 5, characterized in that: The end of the screw (51) away from the positioning sleeve (43) passes through the fixing post (41) and is provided with an end block (511) that facilitates the rotation of the screw (51) by hand.

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