A construction assembly and method for a tower crane foundation based on reverse construction

Abstract

The present application relates to the field of building construction technology, specifically to a construction component and method for tower crane foundation based on reverse construction, which comprises four square arranged steel structure lattice columns, the bottom of which is fixed with engineering piles, and the top of which penetrates reinforced concrete pile cap and installs pegs. Tower crane foundation section is pre-buried in the pile cap, and a support steel sleeve is externally sleeved, one end of the connecting column is fixed with the support steel sleeve, and the other end is connected with a limiting fixed connecting plate. Through innovative design, the engineering piles and lattice columns are used as force transmission carriers to pour the pile cap above the basement roof, avoiding traditional reserved openings, forming a continuous load transmission path, eliminating the risk of leakage and structural cracking, and ensuring underground airtightness. The reverse construction sequence is adopted to enable the tower crane in advance, and the support members are welded synchronously during layered excavation to build a dynamically stable frame, improving the collaborative efficiency and safety of deep foundation pit and main structure.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a construction component and method for a tower crane foundation based on reverse construction with one column and one pile. Background Technology

[0002] The reverse construction method, using a single pile and column, is a key technology in modern urban deep foundation pit engineering. Its core lies in pre-completing the basement retaining structure and supporting pile system, forming a vertical load-bearing frame before excavation. With the continuous increase in building depth and increasingly limited construction space in densely populated urban areas, the reverse construction method, due to its high adaptability to site conditions, has gradually become the mainstream choice for intensive development. In such projects, the vertical transportation needs during the construction phase of the basement's horizontal structure are particularly prominent, requiring the deployment of tower cranes before excavation. However, traditional tower crane foundations, relying on the excavated working surface, fundamentally contradict the reverse construction process, necessitating a breakthrough solution.

[0003] In existing technologies, the construction of tower crane foundations generally follows standard models provided by equipment manufacturers, whose design logic is significantly out of sync with site geological conditions and engineering structural characteristics. Especially in reverse-construction deep foundation pit scenarios, conventional tower crane layouts not only struggle to match the phased construction schedule but also force the reservation of large openings due to the unfinished basement roof structure, leading to potential leakage hazards and structural weakening risks. To coordinate reverse-construction efficiency, vertical transportation effectiveness, and structural safety, this invention proposes a reverse-construction one-column-one-pile tower crane foundation construction component and method to address the aforementioned problems. Summary of the Invention

[0004] The purpose of this invention is to provide a construction component and method for a tower crane foundation based on reverse construction with one column and one pile, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a construction component and method for a tower crane foundation based on reverse construction with one column and one pile, comprising: a steel lattice column, wherein the number of steel lattice columns is set to four, and the four steel lattice columns are arranged in a square, the bottom of the steel lattice column is fixedly inserted into the engineering pile, the top of the steel lattice column penetrates the reinforced concrete foundation, and several studs are fixedly installed at the upper end of the steel lattice column; The tower crane foundation embedded section is pre-embedded in the reinforced concrete foundation. The tower crane foundation embedded section is covered with a supporting steel sleeve. The supporting steel sleeve is fixedly connected to one end of the connecting column, and the other end of the connecting column is fixedly connected to the connecting plate. A limiting component for limiting and fixing the connecting plate is connected to one side of the connecting plate.

[0006] Preferably, the steel lattice columns are all composed of four angle steels and four lacing plates welded together.

[0007] Preferably, a steel reinforcement cage is welded and fixed to the bottom outer wall of the steel structure lattice column, a drill hole of the same diameter as the steel reinforcement cage is opened at the top of the engineering pile, and a filling groove is opened on the upper side of the reinforced concrete pile cap.

[0008] Preferably, the limiting component includes a limiting frame, one side of which is fixedly connected to the outer wall of the reinforced concrete foundation, and the other side of which is rotatably connected to one end of a large air cylinder via a limiting shaft, and the other end of the large air cylinder is fixedly connected to one end of the bottom of the movable frame.

[0009] Preferably, a connecting frame is fixedly installed at one end of the top of the mobile frame, a limit rod is fixedly connected to the top of the connecting frame, a limit block is fixedly installed at one end of the limit rod, sliding holes are opened on both sides of the limit frame, the sliding holes are slidably connected to the two ends of the sliding rod, and the middle part of the sliding rod is fixedly connected to the top side of the mobile frame.

[0010] Preferably, the four steel lattice columns are welded and fixed together with transverse struts, first diagonal struts and second diagonal struts, and the two second diagonal struts are fixed together by welding with steel rods.

[0011] A construction method based on a reverse-construction single-column single-pile tower crane foundation construction component includes the following steps: The existing steel lattice columns and engineering piles are used as vertical load-bearing components for the tower crane foundation. A reinforced concrete foundation platform is set on the basement roof slab, with the tower crane foundation pre-embedded in the reinforced concrete foundation platform. The reinforced concrete foundation platform is poured before the construction of slab B. The tower crane load is directly transferred to the steel lattice columns and engineering piles through the independent reinforced concrete foundation platform, and then to the bearing layer of the foundation. There are no reserved openings during the construction process, avoiding the quality hazards such as leakage and cracking caused by reserved openings in the basement. It is economical, efficient and simple to construct.

[0012] The steel lattice columns are assembled. Each steel lattice column is welded from angle steel and gusset plates. All welds are full-length welds with a height of 10 mm. Several studs are fixedly installed at the top of the steel lattice column. After the steel lattice column is assembled, the reinforcing cage is welded onto it. Then, holes are drilled at the top of the engineering pile to facilitate the installation of the reinforcing cage and the steel lattice column. Finally, the concrete is poured between the engineering pile, the reinforcing cage, and the steel lattice column.

[0013] Because reverse construction was adopted and the reinforced concrete foundation was located at the top of the basement, the reinforced concrete foundation support system used soil formwork. Crushed stone was then used to replace and compact the filling trench. During this process, the tower crane foundation pre-embedded section was treated. At the same time, a support steel sleeve was installed at the bottom before the tower crane foundation pre-embedded section was treated. The connecting plate and connecting column were limited by the limiting components, thereby limiting the support steel sleeve. In turn, the support steel sleeve stabilized the bottom of the tower crane foundation pre-embedded section, ensuring the stability of the tower crane in subsequent use.

[0014] As the first layer of soil in the foundation pit is excavated, horizontal struts, the first diagonal struts, and the second diagonal struts are welded between the steel lattice columns within this excavation height range. This process is repeated between each soil layer until the support welding is completed within the height range of the final soil layer. The tower crane can operate normally during the earthwork excavation, support welding, and subsequent structural construction.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By reusing existing engineering piles and steel lattice columns as the vertical force transmission carrier for the tower crane, and by casting a reinforced concrete foundation high above the basement roof slab, the giant pre-reserved openings penetrating the roof slab in traditional methods are completely avoided. The tower crane load is directly transmitted to the pile-column system through the foundation, forming an uninterrupted force transmission path, eliminating the risk of basement leakage and structural cracking at the source, and ensuring the permanent airtightness of the underground space.

[0016] The tower crane foundation platform was poured and put into use before the construction of the basement roof slab, enabling vertical transportation capacity during the earthwork excavation stage. Simultaneously with the layered excavation of the foundation pit, multi-directional support components between the lattice columns were welded, forming a progressively stable frame adapted to the excavation depth. This dynamic support mechanism allows the tower crane to participate in all stages of the reverse construction process, significantly improving the efficiency and safety of the coordinated construction of the deep foundation pit and the main structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a bottom view of the internal structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a side view of the internal structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B; Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point C; Figure 8 For the present invention Figure 5 Enlarged schematic diagram of the structure at point D.

[0018] In the diagram: 1. Steel lattice column; 2. Engineering pile; 3. Reinforced concrete foundation; 4. Stud; 5. Tower crane foundation embedded section; 6. Support steel sleeve; 7. Connecting column; 8. Connecting plate; 9. Angle steel; 10. Draw plate; 11. Reinforcing cage; 12. Drill hole; 13. Filling groove; 14. Limiting frame; 15. Limiting shaft; 16. Large air cylinder; 17. Moving frame; 18. Connecting frame; 19. Limiting rod; 20. Limiting block; 21. Sliding hole; 22. Sliding rod; 23. Horizontal strut; 24. First diagonal strut; 25. Second diagonal strut; 26. Steel rod. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0020] Please see Figures 1 to 8 This invention provides a technical solution: a construction component and method for a tower crane foundation based on reverse construction with one column and one pile, comprising: four steel lattice columns 1 arranged in a square shape; the bottom of each steel lattice column 1 is fixedly connected to an engineering pile 2; the top of each steel lattice column 1 penetrates a reinforced concrete foundation 3; several studs 4 are fixedly installed at the upper end of each steel lattice column 1; a tower crane foundation pre-embedded section 5 is pre-embedded within the reinforced concrete foundation 3; a supporting steel sleeve 6 is fitted outside the pre-embedded section 5; the supporting steel sleeve 6 is fixedly connected to one end of a connecting column 7; and the other end of the connecting column 7 is fixedly connected to a connecting plate 8. One side of the connecting plate 8 is connected to a limiting component for limiting and fixing the connecting plate 8. The original steel lattice column 1 and engineering pile 2 are used as the vertical load-bearing components of the tower crane foundation. A reinforced concrete foundation 3 is set on the top slab of the basement. The tower crane foundation embedded section 5 is pre-embedded in the reinforced concrete foundation 3. The reinforced concrete foundation 3 is poured before the construction of the B0 slab. The tower crane load is directly transferred to the steel lattice column 1 and engineering pile 2 through the independent reinforced concrete foundation 3, and then transferred to the foundation bearing layer. There are no reserved openings during the construction process, avoiding the quality hazards such as leakage and cracking caused by reserved openings in the basement. It is economical, efficient and simple to construct.

[0021] Each steel lattice column 1 is composed of four angle steels 9 and four connecting plates 10 welded together. A reinforcing cage 11 is welded and fixed to the bottom outer wall of each steel lattice column 1. A drilled hole 12 of the same diameter as the reinforcing cage 11 is opened at the top of each engineering pile 2. A filling groove 13 is opened on the upper side of the reinforced concrete foundation 3. First, the steel lattice columns 1 are assembled. Each steel lattice column 1 is welded from angle steels 9 and connecting plates 10, with all welds being full-length welds with a weld height of ten millimeters. Several studs 4 are fixedly installed at the top of each steel lattice column 1. The studs 4 are shear-resistant connectors between the steel lattice column 1 and the reinforced concrete foundation 3, ensuring the connection between the reinforced concrete foundation 3 and the steel structure below. A strong shear connection is formed between the steel lattice columns 1. After the steel lattice columns 1 are assembled, the reinforcing cage 11 is welded onto them. Then, a hole 12 is drilled at the top of the engineering pile 2. After drilling, an ultrasonic tester is used to test the verticality of the pile hole. If the verticality does not meet the design requirements, a rotary drilling rig is used to repair the hole until the verticality of the pile hole meets the requirement of ≤1 / 200. This facilitates the installation of the reinforcing cage 11 and the steel lattice columns 1 inside. The fabricated steel lattice columns 1 are connected to the reinforcing cage 11 and placed in position. Finally, the concrete is poured between the engineering pile 2, the reinforcing cage 11, and the steel lattice columns 1.

[0022] The limiting assembly includes a limiting frame 14. One side of the limiting frame 14 is fixedly connected to the outer wall of the reinforced concrete foundation 3. The other side of the limiting frame 14 is rotatably connected to one end of a large air cylinder 16 via a limiting shaft 15. The other end of the large air cylinder 16 is fixedly connected to one bottom end of a movable frame 17. The large air cylinder 16 is electrically connected to an external control device. A connecting frame 18 is fixedly installed at one top end of the movable frame 17. A limiting rod 19 is fixedly connected to the top of the connecting frame 18. A limiting block 20 is fixedly installed at one end of the limiting rod 19. Sliding holes 21 are provided on both side walls of the limiting frame 14. The sliding holes 21 are slidably connected to both ends of a sliding rod 22. The middle part of the sliding rod 22 is fixedly connected to the top side of the movable frame 17. Because reverse construction is adopted and the reinforced concrete foundation 3 is located at the top of the basement, the support system of the reinforced concrete foundation 3 uses soil formwork. Then, crushed stone is used for replacement and compaction in the filling trench 13. During this process, the tower crane foundation pre-embedded section 5 is treated. At the same time, a support steel sleeve 6 is installed at the bottom before the tower crane foundation pre-embedded section 5 is treated. By controlling the output end of the atmospheric cylinder 16 to extend, the non-output end of the atmospheric cylinder 16 rotates on the limit frame 14 through the limit shaft 15, thereby driving the moving frame 17 to move. The moving frame 17 slides in the limit frame 14 through the sliding connection between the sliding rod 22 and the sliding hole 21, moving towards the reinforced concrete foundation 3. Then, the connecting frame 18 drives the limit block 20 on the limit rod 19 to move towards the connecting plate 8 until one side of the limit block 20 is engaged with one side of the connecting plate 8. The limit block 20 limits the connecting column 7 fixedly connected to the connecting plate 8, and the support steel sleeve 6 stabilizes the bottom of the tower crane foundation pre-embedded section 5, ensuring the stability of the tower crane in subsequent use.

[0023] The four steel lattice columns 1 are welded and fixed together by transverse struts 23, first diagonal struts 24, and second diagonal struts 25. The two second diagonal struts 25 are welded and fixed together by steel rods 26. As the first layer of soil in the foundation pit is excavated, the transverse struts 23, first diagonal struts 24, and second diagonal struts 25 are welded between the steel lattice columns 1 within this excavation height range. This process is repeated for each soil layer until the support welding is completed within the height range of the final soil layer. The tower crane can operate normally during the earthwork excavation, support welding, and subsequent structural construction. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction component for a tower crane foundation based on reverse construction with one column and one pile, comprising a steel lattice column (1), characterized in that: The number of steel lattice columns (1) is set to four, and the four steel lattice columns (1) are arranged in a square. The bottom of the steel lattice column (1) is fixedly inserted with the engineering pile (2), and the top of the steel lattice column (1) passes through the reinforced concrete foundation (3). Several studs (4) are fixedly installed on the upper end of the steel lattice column (1). The tower crane foundation embedded section (5) is embedded in the reinforced concrete foundation (3). The tower crane foundation embedded section (5) is fitted with a support steel sleeve (6). The support steel sleeve (6) is fixedly connected to one end of the connecting column (7). The other end of the connecting column (7) is fixedly connected to the connecting plate (8). A limiting component for limiting and fixing the connecting plate (8) is connected to one side of the connecting plate (8). The limiting component includes a limiting frame (14), one side of which is fixedly connected to the outer wall of the reinforced concrete foundation (3), and the other side of which is rotatably connected to one end of the atmospheric cylinder (16) via a limiting shaft (15), and the other end of the atmospheric cylinder (16) is fixedly connected to one end of the bottom of the movable frame (17). A connecting frame (18) is fixedly installed at one end of the top of the mobile frame (17). A limiting rod (19) is fixedly connected to the top of the connecting frame (18). A limiting block (20) is fixedly installed at one end of the limiting rod (19). Sliding holes (21) are opened on both sides of the limiting frame (14). The sliding holes (21) are slidably connected to both ends of the sliding rod (22). The middle part of the sliding rod (22) is fixedly connected to the top side of the mobile frame (17). A filling groove (13) is provided on the upper side of the reinforced concrete foundation (3); crushed stone is replaced and compacted in the filling groove (13).

2. The construction component for a tower crane foundation based on reverse-construction single-column single-pile as described in claim 1, characterized in that: The steel lattice column (1) is composed of four angle steels (9) and four lacing plates (10) welded together.

3. The construction component for a tower crane foundation based on reverse-construction single-column single-pile as described in claim 2, characterized in that: The steel structure lattice column (1) has a steel cage (11) welded and fixedly installed on the bottom outer wall, and the top of the engineering pile (2) has a drill hole (12) with the same diameter as the steel cage (11).

4. The construction component for a tower crane foundation based on reverse-construction single-column single-pile as described in claim 1, characterized in that: The four steel lattice columns (1) are welded together with a transverse strut (23), a first diagonal strut (24), and a second diagonal strut (25). The two second diagonal struts (25) are welded together with a steel rod (26).

5. A construction method for a tower crane foundation based on a reverse-construction single-column single-pile construction component according to claim 4, characterized in that: Using the existing steel lattice column (1) and engineering pile (2) as the vertical load-bearing components of the tower crane foundation, a reinforced concrete foundation (3) is set on the top slab of the basement. The tower crane foundation embedded section (5) is pre-embedded in the reinforced concrete foundation (3). The reinforced concrete foundation (3) is poured before the construction of the B0 slab. The tower crane load is directly transferred to the steel lattice column (1) and engineering pile (2) through the independent reinforced concrete foundation (3), and then transferred to the bearing layer of the foundation. There are no reserved openings during the construction process, avoiding quality hazards such as leakage and cracking caused by reserved openings in the basement. It is economical, efficient and simple to construct.

6. A construction method for a tower crane foundation based on a reverse-construction single-column single-pile construction component according to claim 5, characterized in that: The steel lattice column (1) is assembled. Each steel lattice column (1) is welded from angle steel (9) and gusset plate (10). The welds are all full-length welds with a height of 10 mm. Several studs (4) are fixedly installed at the top of the steel lattice column (1). After the steel lattice column (1) is assembled, the steel cage (11) is welded on it. Then, a hole (12) is drilled at the top of the engineering pile (2) to facilitate the installation of the steel cage (11) and the steel lattice column (1) inside. Finally, the engineering pile (2), the steel cage (11) and the steel lattice column (1) are poured.

7. A construction method for a tower crane foundation based on a reverse-construction single-column single-pile construction component according to claim 6, characterized in that: Since the reverse construction is adopted and the reinforced concrete foundation (3) is located at the top of the basement, the support system of the reinforced concrete foundation (3) adopts soil formwork, and the tower crane foundation embedded section (5) is processed in this process. At the same time, before the tower crane foundation embedded section (5) is processed, a support steel sleeve (6) is installed at the bottom. The connecting plate (8) and connecting column (7) are limited by the limiting component, thereby limiting the support steel sleeve (6). Then, the bottom of the tower crane foundation embedded section (5) is stably limited by the support steel sleeve (6) to ensure the stability of the tower crane in subsequent use.

8. A construction method for a tower crane foundation based on a reverse-construction single-column single-pile foundation construction component according to claim 7, characterized in that: As the first layer of soil in the foundation pit is excavated, horizontal struts (23), first diagonal struts (24), and second diagonal struts (25) are welded between the steel lattice columns (1) within the excavation height range. This cycle continues between each soil layer until the support welding is completed within the height range of the last soil layer. The tower crane can operate normally during the earthwork excavation, support welding, and subsequent structural construction.

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