Manufacturing method of direct-buried tower crane foundation

Abstract

This invention provides a method for manufacturing a directly buried tower crane foundation. The method involves pre-installing a connecting section between the top of the reinforcing cage and the bottom of the tower crane pile hole above the ground surface of the tower crane foundation pit. A steel pipe is then lowered into the connecting section of the reinforcing cage, and after adjusting the verticality of the steel pipe and the reinforcing cage, the steel pipe and the reinforcing cage are pre-fixed together. A positioning ring on the outside of the steel pipe ensures that the pre-fixed steel pipe and the reinforcing cage are lowered vertically into the tower crane pile hole. A first concrete pour is then made from inside the steel pipe into the tower crane pile hole. The tower crane foot is buried at the pre-embedded line of the steel pipe foot, and after adjusting the verticality of the tower crane foot and the steel pipe, the tower crane foot is fixed to the steel pipe. A second concrete pour is then made into the steel pipe to fix the tower crane foot to the steel pipe, forming a tower crane foot, steel pipe, and cast-in-place pile with consistent verticality. This method not only simplifies the manufacturing process and provides stronger connections, but also reduces the likelihood of tilting during tower crane use.

Description

Technical Field

[0001] This invention relates to the field of tower cranes, and in particular to a method for manufacturing a directly buried tower crane foundation. Background Technology

[0002] Large steel pipe pile tower cranes need to be installed before the excavation of the foundation pit and put into use during the earthwork and foundation pit construction phases. The foundation feet of the large steel pipe pile tower crane are set on a precast concrete platform or steel pipe flange on top of the steel pipe pile. The purpose of setting the precast concrete platform or steel pipe flange on top of the steel pipe pile is to: facilitate the installation of the tower crane foundation feet; adjust the verticality of the tower crane foundation feet, thereby ensuring the verticality of the tower crane; and enhance the support for the tower crane foundation feet by setting support components on the precast concrete platform or steel pipe flange.

[0003] However, as the height and size of tower cranes continue to increase, the existing precast concrete platforms or steel pipe flange connection methods are no longer sufficient to support the load of the tower cranes. In order to enhance the support for the tower crane's feet, support beams or tension beams in various directions are usually added to the precast concrete platforms or steel pipe flanges to prevent the tower crane from tilting. However, such complex structures are very difficult to design and calculate, as well as to construct on site. In particular, once a tilting problem occurs, subsequent repairs are even more difficult. Therefore, the existing tower crane foot connection needs further improvement and refinement. Summary of the Invention

[0004] The present invention aims to propose a method for manufacturing a directly buried tower crane foundation, so as to alleviate the problem of insufficient vertical support of existing tower crane foundations and the easy tilting of tower cranes caused by insufficient support.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A method for manufacturing a directly buried tower crane foundation includes the following steps:

[0007] Obtain tower crane pile holes in the tower crane foundation pit; the tower crane pile holes are used to form steel pipe piles and cast-in-place piles.

[0008] Obtain the reinforcing cage for the cast-in-place pile, wherein the reinforcing cage is a precast reinforcing steel component and the outer diameter of the reinforcing cage is slightly smaller than the diameter of the tower crane pile hole;

[0009] The connection section from the bottom of the tower crane pile hole to the top of the steel cage is left above the ground surface of the tower crane foundation pit.

[0010] Obtain the steel pipe, lower the bottom of the steel pipe into the connecting section of the reinforcing cage, adjust the verticality of the steel pipe and the reinforcing cage, and then pre-fix the steel pipe and the reinforcing cage. The sum of the height of the steel pipe and the height of the reinforcing cage excluding the connecting section should be consistent with the depth of the tower crane pile hole.

[0011] The positioning ring on the outside of the steel pipe allows the pre-fixed steel pipe and reinforcing cage to continue to be lowered into the tower crane pile hole in a vertical direction.

[0012] The first concrete pouring is carried out from inside the steel pipe into the tower crane pile hole. The positioning ring on the outside of the steel pipe ensures that the position of the pre-fixed steel pipe and the reinforcing cage remains unchanged during the first concrete pouring process. The first concrete is poured to the pre-embedded line of the steel pipe's anchor.

[0013] The tower crane's footing is buried at the pre-embedded line of the steel pipe. After adjusting the verticality of the tower crane's footing and the steel pipe, the tower crane's footing is fixed to the steel pipe. A second concrete pour is then made into the steel pipe to fix the tower crane's footing to the steel pipe, forming a tower crane footing, steel pipe, and cast-in-place pile with consistent verticality.

[0014] Furthermore, the step of obtaining the tower crane pile hole on the tower crane foundation pit includes:

[0015] Vertical drilling is carried out on the tower crane foundation pit to obtain vertical tower crane pile holes, which are then driven into the bottom elevation of the trench at the bottom of the tower crane foundation pit.

[0016] Furthermore, the height of the connecting section at the top of the steel cage is 2m-4m.

[0017] Furthermore, the step of pre-fixing the steel pipe and the reinforcing cage after adjusting the perpendicularity of the steel pipe and the reinforcing cage includes:

[0018] Temporarily fix the steel cage;

[0019] Adjust the perpendicularity of the steel pipe and the reinforcing cage so that the central axis of the steel pipe coincides with the central axis of the reinforcing cage;

[0020] The steel pipe is fixed to the reinforcing cage by welding at multiple points, and the central axis of the steel pipe is kept to coincide with the central axis of the reinforcing cage.

[0021] Furthermore, after the step of adjusting the perpendicularity of the steel pipe to the reinforcing cage so that the central axis of the steel pipe coincides with the central axis of the reinforcing cage, the method further includes:

[0022] The steel pipe is sunk to a depth of 2-4m into the reinforcing cage.

[0023] Furthermore, the step of using the positioning ring on the outside of the steel pipe to continue lowering the pre-fixed steel pipe and reinforcing cage vertically into the tower crane pile hole includes:

[0024] Two semi-circular splicing plates are welded to the outside of the steel pipe to form a positioning ring.

[0025] Furthermore, the outer diameter of the positioning ring is slightly smaller than the inner diameter of the tower crane pile hole wall.

[0026] Furthermore, the two semi-circular splicing plates of the positioning ring are removed after the earthwork around the steel pipe pile is excavated.

[0027] Furthermore, the distance between the pre-embedded anchor line of the steel pipe sleeve and the top of the steel pipe sleeve is 4-6m.

[0028] Furthermore, the step of adjusting the verticality of the tower crane's baseboard includes:

[0029] The verticality of the tower crane's base line is measured using a theodolite, and the verticality of the tower crane's base line is adjusted based on the theodolite measurement results.

[0030] Compared with existing technologies, the direct-buried tower crane foundation manufacturing method of this invention has the following advantages: This tower crane foundation manufacturing method changes the existing method of connecting the tower crane feet through a precast concrete platform or steel pipe flange. Instead, the tower crane feet are fixedly installed on the top of the steel pipe sleeve of the steel pipe pile. The positioning ring of the steel pipe sleeve ensures the verticality of the cast-in-place pile and the steel pipe pile. The tower crane feet are directly set on the top of the steel pipe sleeve of the steel pipe pile, which makes it easier to ensure the verticality of the tower crane feet. The tower crane feet are directly fixed to the steel pipe pile during the pouring stage, which not only simplifies the manufacturing process but also strengthens the connection. The tower crane is also less prone to tilting problems during use. Attached Figure Description

[0031] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0032] Figure 1 This is a schematic flowchart of the direct-buried tower crane foundation manufacturing method according to an embodiment of the present invention. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] The technical problem this embodiment aims to solve is that existing large steel pipe pile tower cranes based on precast concrete platforms or steel pipe flanges are becoming increasingly difficult to support due to the continuous increase in tower crane height, volume, and weight. To address this issue, existing technologies add support beams or tension beams in various directions to the precast concrete platform or steel pipe flange to prevent tower crane tilting. However, this overly complex structure is extremely difficult to design, calculate, and construct on-site. In particular, in actual engineering projects, occasional tower crane tilting is very difficult to repair once it occurs, as the support beams or tension beams in various directions cannot withstand the enormous load caused by the tilt, leading to major accidents such as project shutdowns.

[0036] To address the aforementioned technical problems, this embodiment provides a novel foundation manufacturing solution for large steel pipe pile tower cranes, namely, a direct-buried tower crane foundation manufacturing method. For example... Figure 1 As shown, the manufacturing method of this directly buried tower crane foundation includes the following steps:

[0037] S110: Obtain tower crane pile holes in the tower crane foundation pit, the tower crane pile holes being used to form steel pipe piles and cast-in-place piles.

[0038] By surveying the construction site, the location, size, and depth of the foundation pit are determined, and excavation is carried out according to the construction design requirements. The tower crane foundation pit is the basic structure used to place the tower crane equipment on the construction site. Piles are driven into the tower crane foundation pit to obtain tower crane pile holes.

[0039] After obtaining the tower crane pile holes, the cast-in-place piles and steel pipe piles are formed according to the design plan. The cast-in-place piles are formed by reinforced concrete, which has high construction efficiency, low cost, and excellent durability and seismic resistance. Therefore, they are usually set at the bottom layer and are also longer. The steel pipe piles are formed by using steel pipes, which have strong bearing capacity and good bending resistance. They are usually used to support the main body of the tower crane. During construction, the steel pipe piles need to be fixed to the top of the cast-in-place piles.

[0040] Specifically, first, tower crane pile holes are driven into the tower crane foundation pit, and the tower crane pile holes are driven to the bottom elevation of the trench at the bottom of the foundation pit. The diameter of the tower crane pile holes is 900mm, and the depth of the tower crane pile holes is 20m-40m.

[0041] Specifically, four tower crane pile holes are set in a square orientation on the tower crane foundation pit. Four supporting structures are formed in the four tower crane pile holes. Each supporting structure includes a bottom cast-in-place pile and a top steel pipe pile. In the traditional scheme, a precast concrete platform is set on top of the steel pipe pile. On the one hand, the precast concrete platform can bind the four supporting structures together to form a stable foundation for supporting the tower crane. On the other hand, the precast concrete platform can increase the construction space of the tower crane foundation. Auxiliary structures such as support beams and tension beams in various directions can be added to the precast concrete platform to enhance the stability of the tower crane.

[0042] Based on feedback from construction sites regarding tower crane tilting issues, the main manifestations of tower crane tilting are deformation, displacement, tearing, and tilting of the tower crane's foundation. The causes of these tilts include the tilting of the tower crane's main body, the tilting of the steel pipe piles, or a simultaneous tilting of both the main body and the steel pipe piles. In other words, as the height, volume, and weight of tower cranes increase, traditional patching methods have reached their limits. They cannot fundamentally solve the problem of the increased load-bearing pressure on the tower crane foundation, nor can they effectively prevent tilting by adding more support beams or tension beams. Ultimately, during construction, tower crane tilting accidents due to the inability to bear excessive weight occur frequently.

[0043] A core aspect of this plan is that the connection strength and verticality of the steel pipe piles are considered during construction. Sufficient strength of the steel pipe piles ensures adequate support for the tower crane assembly, while guaranteed verticality ensures the verticality of the tower crane assembly. This also avoids the need for retroactive adjustments to the steel pipe piles, such as corrective measures by the tower crane's anchors, which would reduce the actual load-bearing capacity of the steel pipe piles. In other words, the most stable and ideal foundation with the highest load-bearing capacity is one where the cast-in-place piles, steel pipe piles, and tower crane assembly are all installed on a coaxial vertical line. Any tilting of any of these three structures would reduce the overall load-bearing capacity of the tower crane system.

[0044] The verticality of the lowest-level reinforced concrete piles is achieved through pile driving, making it easy to ensure verticality. However, the verticality of steel pipe piles requires balancing the connection strength and verticality between the steel pipe piles and the cast-in-place piles. In actual construction, workers are often reluctant to increase their workload to ensure more precise verticality because the verticality of subsequent steel pipe piles is allowed to deviate slightly and the deviation can be corrected by the tower crane's anchor points. This difficulty stems from the fact that the steel pipe piles need to be fixed to the reinforcing cage of the cast-in-place piles. The welding space between the steel pipe piles and the reinforcing cage is narrow, making the work difficult. Furthermore, in traditional solutions, once the steel pipe piles are fixed, it is difficult to adjust the angle of verticality; if they are not fixed, welding is difficult. Therefore, the verticality of the steel pipe piles is often ensured based on the construction workers' experience, which is insufficient in terms of controlling the verticality of the steel pipe piles.

[0045] Therefore, in subsequent steps S120-S150, the first core problem mentioned above is overcome.

[0046] S120: Obtain the reinforcing cage for the cast-in-place pile. The reinforcing cage is a precast reinforcing steel component. The outer diameter of the reinforcing cage is slightly smaller than the diameter of the tower crane pile hole to ensure that the reinforcing cage can be lowered into the tower crane pile hole. S130: Lower the reinforcing cage into the tower crane pile hole, and leave at least part of the upper connecting section of the reinforcing cage above the ground surface of the tower crane foundation pit.

[0047] S140: Take the steel pipe, lower the bottom of the steel pipe into the connecting section of the reinforcing cage, adjust the verticality of the steel pipe and the reinforcing cage, and then pre-fix the steel pipe and the reinforcing cage. The sum of the height of the steel pipe and the height of the reinforcing cage excluding the connecting section is consistent with the depth of the tower crane pile hole.

[0048] S150: The fixed steel pipe and the reinforcing cage are lowered vertically into the tower crane pile hole through the positioning ring on the outside of the steel pipe until the bottom elevation of the trench.

[0049] In the above scheme, firstly, the reinforcing cage of the cast-in-place pile is not directly lowered into the tower crane pile hole, but a portion is left outside, that is, at least a connecting section is reserved above the ground surface. This reserved position is to adjust the connection stability and verticality consistency between the steel pipe pile and the reinforcing cage of the cast-in-place pile. Unlike the traditional manufacturing method, this scheme does not directly lower the reinforcing cage into the tower crane pile hole, but at least a connecting section is reserved above the ground surface. At this time, there is still space in the tower crane pile hole that includes at least the height of the steel pipe.

[0050] The pre-existing portion of the reinforcing cage is positioned above the surface of the tower crane pit, typically at a height of 1m-3m. Simultaneously, the steel pipe is hoisted and lowered into the connecting section of the reinforcing cage. At this point, the reinforcing cage can be fixed first, and the verticality of the steel pipe and the reinforcing cage can be adjusted to be consistent. After adjusting the depth of the steel pipe into the reinforcing cage to the preset depth, the steel pipe and the reinforcing cage are pre-fixed by spot welding. Since the spot welded portions of the steel pipe and the reinforcing cage are still at least above ground level, the surrounding space is large, and the operation is convenient. Therefore, it can be easily implemented on the construction site, ensuring consistent verticality between the reinforcing cage and the steel pipe, and precisely controlling the depth of the overlap. Furthermore, multi-point welding ensures sufficient stability of the pre-connection.

[0051] At this point, the steel pipe and rebar cage continue to be lowered. Since the steel pipe and rebar cage have been pre-fixed and connected, their verticality must be consistent during the lowering process. However, because the diameter of the steel pipe is smaller than the diameter of the rebar cage, and the diameter of the rebar cage is also slightly smaller than the diameter of the tower crane pile hole, the traditional method cannot guarantee that the steel pipe and rebar cage are vertical when they continue to be lowered. The traditional approach is to control the verticality of the rebar cage based on the opinions of the on-site construction personnel, trying to ensure the verticality of the rebar cage as much as possible. Similarly, since the rebar cage can be adjusted during the installation of the tower crane feet even if it is not perfectly vertical, the workers will not pursue the verticality of the rebar cage very precisely, nor can they achieve it.

[0052] In this design, a detachable positioning ring is installed on the outside of the steel pipe. The outer diameter of the positioning ring is consistent with the inner diameter of the tower crane pile hole. Therefore, the positioning ring ensures that the steel pipe is perfectly perpendicular to the tower crane pile hole when it is lowered in. Furthermore, the positioning ring itself has a limited thickness, so even if there is some friction with the hole wall, it will not affect the smooth lowering of the very heavy steel pipe into the tower crane pile hole. Simultaneously, the positioning ring on the steel pipe also ensures the verticality of the reinforcing cage, which is something that traditional methods cannot achieve.

[0053] Two semi-circular splicing plates are welded to the outer side of the steel pipe sleeve. These two semi-circular splicing plates are welded together to form a positioning ring. The outer diameter of the pipe sleeve is 600mm, and the outer diameter of the positioning ring is slightly smaller than the inner diameter of the pile hole wall. The positioning ring needs a certain thickness to ensure it can stabilize the steel pipe sleeve; typically, the thickness of the semi-circular splicing plate is greater than 50mm. The two semi-circular splicing plates can be removed after the steel pipe sleeve forms the steel pipe pile, once the excavation pit has been opened.

[0054] At this point, the first core problem of tower crane tilting was solved. The pre-welding of the pre-reinforced steel cage and steel pipe ensured the consistency of their verticality, and a positioning ring solved the problem of ensuring that both were inserted vertically into the tower crane pile hole.

[0055] Continuing, S160: The first concrete pour is carried out from inside the steel pipe into the tower crane pile hole. The positioning ring on the outside of the steel pipe ensures that the position of the pre-fixed steel pipe and the reinforcing cage remains unchanged during the first concrete pour. The first concrete is poured to the pre-embedded line of the steel pipe's anchor.

[0056] When construction workers lower the reinforcing cage, they do not pursue verticality. This is not only because it is difficult to control, but also because even if the vertical direction of the reinforcing cage is very precise, the cage will deviate in direction due to the impact of the concrete grout when it is lowered, causing the verticality to no longer match the initial verticality. The positioning ring in this solution not only ensures the vertical orientation of the reinforcing cage and steel pipe when they are lowered, but also prevents them from shifting due to the impact of the concrete grout when it is lowered. This ensures that the final cast-in-place piles and steel pipe piles have consistent verticality and are set in the correct vertical direction.

[0057] In traditional methods, it is difficult for technicians to achieve consistent verticality of the reinforcing cages in steel pipe piles and cast-in-place piles, and it is also unnecessary to do so. Therefore, steel pipe piles for large tower crane foundations almost inevitably have a certain degree of tilt. In actual construction, it is only possible to ensure that the tilt of the steel pipe piles is within the design range. Due to the tilt of the steel pipe piles, directly inserting the tower crane footing into the steel pipe sleeve and pouring concrete grout in this method may cause the verticality adjustment range of the tower crane footing to not meet the design requirements. Therefore, a precast concrete platform or steel pipe flange is set on the top of the steel pipe pile. The precast concrete platform or steel pipe flange increases the insertion area and insertion angle of the steel pipe pile footing, ensuring that even if the steel pipe sleeve is tilted, it can still be inserted into the tower crane footing as designed. At the same time, it can be ensured that the tilt of the steel pipe sleeve can be corrected by the verticality of the tower crane footing. In addition, support beams and tension beams in various directions can be added to improve the adhesion of the tower crane footing.

[0058] Continuing, the tower crane foot is buried at the pre-embedded line of the steel pipe. After adjusting the verticality of the tower crane foot and the steel pipe, the tower crane foot is fixed to the steel pipe. Then, a second concrete pour is carried out into the steel pipe to fix the tower crane foot to the steel pipe, forming a tower crane foot, steel pipe and cast-in-place pile with consistent verticality.

[0059] Unlike traditional methods that use precast concrete platforms or steel pipe flanges on top of steel pipe piles for the tower crane's foundation, this solution directly embeds the tower crane's foundation into the steel pipe and fixes it with poured concrete. Because the steel pipe is very strong, the strength of the foundation after embedding it meets construction requirements. Since the tower crane's foundation is relatively lightweight and the construction work is above ground, adjusting verticality and maintaining verticality during concrete pouring are easy. Furthermore, the second pour of concrete for the tower crane's foundation does not require waiting for the concrete in the reinforcing cage and steel pipe to solidify; it can be poured directly. The presence of positioning rings ensures that the second pour does not affect the verticality of the steel pipe or its placement. In other words, the positioning rings on the outside of the steel pipe guarantee the consistency of verticality, accuracy of vertical orientation, and stability of subsequent construction across the three components and three construction processes: the steel pipe, the reinforcing cage, and the tower crane's foundation.

[0060] The existing tower crane support structure consists of a support column and a limiting plate, with the limiting plate fixedly welded to the bottom of the support column. When the top of the steel pipe sleeve is a precast concrete platform, the support column and limiting plate are pre-welded to the reinforcing steel of the precast platform before concrete is poured. When the top of the steel pipe sleeve is a steel pipe flange, the support column and limiting plate are pre-welded to the steel pipe flange before concrete is poured. Because the precast concrete platform and steel pipe flange are very large, and the apertures on them are much larger than those on the steel pipe sleeve, there is more working space, and more supporting components can be installed to ensure the support strength of the tower crane support. This is the reason for using a precast concrete platform or steel pipe flange on top of the steel pipe sleeve.

[0061] The tower crane's support structure in this method is a support column. The support column can be deeply embedded within the steel pipe sleeve; the support strength of the tower crane's support structure is increased simply by extending the length of the support column to increase the contact area between the tower crane's support and the steel pipe sleeve.

[0062] To further enhance the connection strength between the tower crane's footing and the steel pipe sleeve, rivets can be evenly distributed on the tower crane's footing. After the concrete is poured and formed, the rivets are stably connected to the concrete, which can further enhance the connection strength between the tower crane's footing and the steel pipe sleeve, thereby meeting the support requirements of the tower crane.

[0063] Ultimately, this resulted in a vertically aligned tower crane foundation consisting of steel pipe piles and cast-in-place piles. Furthermore, aside from connecting the steel pipe piles and cast-in-place piles, and the tower crane foundation itself, almost all concrete pouring was performed in one go, eliminating the need for segmented curing time and significantly reducing the tower crane foundation's manufacturing time.

[0064] After the concrete has cured, the large tower crane will be erected on the base of the tower crane.

[0065] This tower crane foundation manufacturing method changes the existing method of connecting the tower crane feet through precast concrete platforms or steel pipe flanges. Instead, the tower crane feet are fixedly installed on the top of the steel pipe sleeve of the steel pipe pile. The positioning ring of the steel pipe sleeve ensures the verticality of the cast-in-place pile and the steel pipe pile. The tower crane feet are directly set on the top of the steel pipe sleeve of the steel pipe pile, which makes it easier to ensure the verticality of the tower crane feet. The tower crane feet are directly fixed to the steel pipe pile during the pouring stage. This not only simplifies the manufacturing process but also strengthens the connection and makes it less likely for the tower crane to tilt during use.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for manufacturing a directly buried tower crane foundation, characterized in that, Includes the following steps: Obtain tower crane pile holes in the tower crane foundation pit; the tower crane pile holes are used to form steel pipe piles and cast-in-place piles. Obtain the reinforcing cage for the cast-in-place pile, wherein the reinforcing cage is a precast reinforcing steel component and the outer diameter of the reinforcing cage is slightly smaller than the diameter of the tower crane pile hole; The connection section from the bottom of the tower crane pile hole to the top of the steel cage is left above the ground surface of the tower crane foundation pit. Obtain a steel pipe, lower the bottom of the steel pipe into the connecting section of the reinforcing cage, adjust the verticality of the steel pipe and the reinforcing cage, and then pre-fix the steel pipe and the reinforcing cage. The sum of the height of the steel pipe and the height of the reinforcing cage excluding the connecting section should be consistent with the depth of the tower crane pile hole. The step of adjusting the verticality of the steel pipe and the reinforcing cage and then pre-fixing the steel pipe and the reinforcing cage includes: temporarily fixing the reinforcing cage; adjusting the verticality of the steel pipe and the reinforcing cage so that the central axis of the steel pipe coincides with the central axis of the reinforcing cage; and fixing the steel pipe and the reinforcing cage by welding at multiple points, while keeping the central axis of the steel pipe coincident with the central axis of the reinforcing cage. The pre-fixed steel pipe and reinforcing cage are lowered into the tower crane pile hole in a vertical direction by using the positioning ring on the outside of the steel pipe; the step of using the positioning ring on the outside of the steel pipe to lower the pre-fixed steel pipe and reinforcing cage in a vertical direction includes: welding two semi-circular splicing plates on the outside of the steel pipe to form a positioning ring. The first concrete pouring is carried out from inside the steel pipe into the tower crane pile hole. The positioning ring on the outside of the steel pipe ensures that the position of the pre-fixed steel pipe and the reinforcing cage remains unchanged during the first concrete pouring process. The first concrete is poured to the pre-embedded line of the steel pipe's anchor. The tower crane's footing is buried at the pre-embedded line of the steel pipe. After adjusting the verticality of the tower crane's footing and the steel pipe, the tower crane's footing is fixed to the steel pipe. A second concrete pour is then made into the steel pipe to fix the tower crane's footing to the steel pipe, forming a tower crane footing, steel pipe, and cast-in-place pile with consistent verticality.

2. The method for manufacturing a directly buried tower crane foundation according to claim 1, characterized in that, The steps for obtaining tower crane pile holes on the tower crane foundation pit include: Vertical drilling is carried out on the tower crane foundation pit to obtain vertical tower crane pile holes, which are then driven into the bottom elevation of the trench at the bottom of the tower crane foundation pit.

3. The method for manufacturing a directly buried tower crane foundation according to claim 1, characterized in that, The height of the connecting section at the top of the steel cage is 2m-4m.

4. The method for manufacturing a directly buried tower crane foundation according to claim 1, characterized in that, The step of adjusting the perpendicularity of the steel pipe to the reinforcing cage, so that the central axis of the steel pipe coincides with the central axis of the reinforcing cage, further includes: The steel pipe is sunk to a depth of 2m-4m into the reinforcing cage.

5. The method for manufacturing a directly buried tower crane foundation according to claim 1, characterized in that, The outer diameter of the positioning ring is slightly smaller than the inner diameter of the tower crane pile hole wall.

6. The method for manufacturing a directly buried tower crane foundation according to claim 5, characterized in that, The two semi-circular splicing plates of the positioning ring were removed after the earthwork around the steel pipe pile was excavated.

7. The method for manufacturing a directly buried tower crane foundation according to claim 1, characterized in that, The distance between the pre-embedded anchor line of the steel pipe and the top of the steel pipe is 4-6m.

8. The method for manufacturing a directly buried tower crane foundation according to claim 1, characterized in that, The steps for adjusting the verticality of the tower crane's baseboard include: The verticality of the tower crane's base line is measured using a theodolite, and the verticality of the tower crane's base line is adjusted based on the theodolite measurement results.

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