An assembled foundation and platform of a prefabricated substation cabin structure

Abstract

This utility model discloses a prefabricated foundation and platform for a substation prefabricated cabin structure, relating to the field of power transmission and transformation technology in the power industry. Specifically, it is a prefabricated structure with a modular design, including a prefabricated foundation base, prefabricated columns assembled on the prefabricated foundation base, and column top conversion connection components set on the top of the prefabricated columns. The prefabricated foundation base, prefabricated column units, and column top conversion connection components are connected as a whole by prestressed anchor bolts to form a prefabricated foundation. Adjacent prefabricated foundations are connected by structural beams to form a prefabricated platform. This solution features factory prefabrication, on-site assembly, simple construction, shortened construction period, reliable quality, green construction, and environmental protection without pollution. Different numbers of prefabricated column units can be used to meet the specific requirements of different projects, depending on the differences in foundation bearing capacity and foundation platform elevation. It is widely applicable to prefabricated cabin structures for substations and other similar cabin structures.

Description

Technical Field

[0001] This utility model relates to the field of power transmission and transformation technology in the power industry, specifically to a prefabricated foundation and platform for a substation prefabricated cabin structure. Background Technology

[0002] For substation renovation projects, existing construction methods typically involve multiple stages, including power outages, equipment dismantling, foundation demolition, new foundation construction (including rebar tying, formwork erection, and concrete pouring), and curing. However, this method suffers from long construction cycles and difficulties in quality control. Especially during winter construction, special protective measures are required, increasing construction difficulty, compromising project quality, and leading to prolonged substation outages, resulting in significant power loss and severely impacting grid reliability. More importantly, traditional reinforced concrete foundations have almost zero residual value after their operational lifespan and face challenges such as difficult demolition, large amounts of construction waste, and severe environmental pollution. To address these issues, this application proposes a prefabricated substation foundation and platform with a prefabricated modular structure. Utility Model Content

[0003] This utility model provides a prefabricated foundation and platform for a substation prefabricated cabin structure, which solves the problems mentioned in the background art, such as long construction cycle, difficulty in controlling project quality, low reuse rate of building materials, and waste of resources caused by traditional cast-in-place concrete foundations.

[0004] This utility model provides the following technical solution: a prefabricated foundation and platform for a substation prefabricated cabin structure, which is a prefabricated structure with a modular design, including a prefabricated foundation base, prefabricated columns assembled on the prefabricated foundation base, and a column top conversion connection component set on the top of the prefabricated columns. The prefabricated foundation base, prefabricated column block unit and column top conversion connection component are connected into a whole by prestressed anchor bolts to form a prefabricated foundation. Two adjacent prefabricated foundations are connected by structural beams to form a prefabricated platform. The prefabricated platform is connected to the steel structure base of the prefabricated cabin structure by prestressed anchor bolts. A platform beam is set at the top of one side of the prefabricated platform.

[0005] The precast column is an assembled structure, comprising precast column block units. The precast column block units are assembled and installed with positioning pins and shear keys between adjacent precast column block units and between them and the precast foundation base and the column top conversion connection components.

[0006] Preferably, each of the four sides of the prefabricated foundation base is provided with a lifting ring.

[0007] Preferably, a positioning pin is provided at the middle of each of the four sides of the top of the precast column block unit, and a positioning pin mounting hole adapted to the positioning pin is reserved at the corresponding position at the bottom of the precast column block unit; a shear key mounting groove is provided at the middle of the top of the precast column block unit, and a shear key adapted to the shear key mounting groove is provided at the middle of the bottom of the precast column block unit.

[0008] Preferably, the sidewall of the column top transition connection component is provided with a pre-embedded anchor bolt, which is adapted to the structural beam and the platform beam, and the end of the pre-embedded anchor bolt is exposed outside the column top transition connection component.

[0009] Preferably, the pre-embedded anchor bolt is a fully threaded component, with a first nut anchor head and an anchoring plate in the middle, and a pre-embedded steel plate at the end of the pre-embedded anchor bolt, with the end of the pre-embedded steel plate away from the first nut anchor head located outside the column top transition connection component.

[0010] Preferably, the prestressed anchor bolt is a replaceable component, and the steel structure base of the precast foundation base, precast column block unit, column top conversion connection component and substation precast cabin structure are all provided with anchor bolt installation holes. The prestressed anchor bolt is connected to the precast foundation base through a pre-embedded anchor plate and a second nut anchor head.

[0011] Preferably, the prestressed anchor bolt includes a smooth circular section and a threaded section. The smooth circular section is fitted with a high-density plastic sleeve and sealed with anti-corrosion grease. Both ends of the prestressed anchor bolt are provided with threaded sections.

[0012] Preferably, the top and bottom of the precast column unit are provided with water-stop strip fixing grooves, and water-swellable water-stop strips are provided in the water-stop strip fixing grooves; external water-stop strips are provided on the outside of the splicing joints of the assembled platform.

[0013] Preferably, the prefabricated platform is provided with a platform railing beam and a steel ladder. The steel ladder is connected to the structural beam, and the lower end of the steel ladder is connected to the prefabricated foundation base. The platform railing beam is connected to the end of the platform beam away from the prefabricated platform, and a platform railing is provided on the platform railing beam.

[0014] Preferably, a steel grating is installed on the platform beam, and two adjacent platform beams are connected by the steel grating.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The prefabricated foundation and platform of this substation's prefabricated cabin structure features factory prefabrication, on-site assembly, simple construction, shortened construction period, reliable quality, green construction, and environmental friendliness. Its components adopt a modular design, allowing for the use of different numbers of prefabricated column units to meet the specific requirements of different projects, based on variations in foundation bearing capacity and foundation platform elevation. It is widely applicable to prefabricated cabin structures in substations and other similar cabin structures.

[0017] 2. The prefabricated foundation and platform of this substation are prefabricated structures with modular design, making installation and dismantling simple and convenient. Each module is reusable, resulting in high residual value and minimal construction waste, which is beneficial to environmental protection. It avoids the disadvantages of long construction cycles and difficulty in quality control associated with cast-in-place concrete foundations; it also reduces the impact of external weather conditions during construction, avoiding the adverse effects of winter construction, resulting in high construction efficiency, easy assurance of assembly quality, and compliance with national green construction requirements. Attached Figure Description

[0018] Figure 1 This is a front view of the structure of this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the structural column top conversion connection component of this utility model;

[0020] Figure 3 This is a schematic diagram of the prefabricated column block unit of the present invention;

[0021] Figure 4 This is a bottom view of the prefabricated column block unit of the present invention.

[0022] Figure 5 This is a schematic diagram of the prestressed anchor bolt structure of this utility model.

[0023] In the diagram: 1. Precast foundation base; 2. Lifting ring; 3. Precast column block unit; 4. Prestressed anchor bolt; 5. Column top transition connection component; 6. Structural beam; 7. Embedded anchor bolt; 8. Platform beam; 9. Steel grating; 10. Platform fence beam; 11. Platform fence; 12. Steel ladder; 13. Positioning pin; 14. Shear key installation groove; 15. Anchor bolt installation hole; 16. Waterstop strip fixing groove; 17. Water-swellable waterstop strip; 18. Shear key; 19. Positioning pin installation hole; 20. Fixing nut; 21. First nut anchor head; 22. Anchor plate; 23. Embedded steel plate; 25. Second nut anchor head; 26. Embedded anchor plate; 27. Threaded section; 28. Smooth round section. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides an embodiment: Please refer to Figures 1-5 A prefabricated foundation and platform for a substation prefabricated cabin structure is disclosed. The prefabricated structure employs a modular design and includes a prefabricated foundation base 1, prefabricated columns mounted on the prefabricated foundation base 1, and column top transition connection components 5 installed on the top of the prefabricated columns. The prefabricated foundation base 1, prefabricated column block units 3, and column top transition connection components 5 are connected as a whole using prestressed anchor bolts 4 to form a prefabricated foundation. Adjacent prefabricated foundations are connected by structural beams 6 to form a prefabricated platform. The prefabricated platform is connected to the steel structure base of the prefabricated cabin structure using prestressed anchor bolts 4. A platform beam 8 is installed at the top of one side of the prefabricated platform.

[0026] The precast foundation base 1 is a reinforced concrete conical structure, with lifting rings 2 installed at the center of each of its four sides to facilitate the hoisting and positioning of the precast foundation base 1. The dimensions of the precast foundation base 1 are designed based on conditions such as the bearing capacity of the foundation and the groundwater level, ensuring that it meets the bearing capacity and deformation requirements of the precast module structure. The precast foundation base 1 is positioned according to the dimensions of the base plate of the substation precast module structure. The foundation pit is excavated to the designed bearing layer, and after the concrete cushion layer is poured, the precast foundation base is hoisted into place.

[0027] The precast columns are assembled structures, comprising precast column block units 3. Adjacent precast column block units 3 are assembled and installed using positioning pins 13 and shear keys 18, as well as between themselves and the precast foundation base 1 and the column top transition connection component 5. The precast column block unit 3 is a hexahedron with similar dimensions on all sides. The number of precast column block units 3 in each precast column can vary depending on the foundation bearing capacity and foundation platform elevation of different projects to meet specific project requirements.

[0028] Four mounting holes 15, compatible with prestressed anchor bolts 4, are pre-drilled at the corners of the precast column block unit 3 using a sleeve core-pulling method. A positioning pin 13 is provided at the center of each of the four sides of the top of the precast column block unit 3. A positioning pin mounting hole 19, compatible with the positioning pin 13, is pre-drilled at the corresponding position on the bottom of the precast column block unit 3, facilitating the assembly and positioning of the precast column block unit 3. A shear key mounting groove 14 is provided at the center of the top of the precast column block unit 3, and a shear key 18, compatible with the shear key mounting groove 14, is provided at the center of the bottom of the precast column block unit 3. The precast column block units 3 are assembled using positioning pins 13 and shear keys 18, ensuring accurate positioning, convenient construction, and enhanced horizontal bearing capacity between different foundation components.

[0029] As described above, the precast columns are modular units that use the same modular dimensions and embedded part specifications, which facilitates the design of the formwork and the replacement of components.

[0030] The side wall of the column top transition connection component 5 is provided with embedded anchor bolts 7, which are adapted to the structural beam 6 and the platform beam 8. The end of the embedded anchor bolt 7 is exposed outside the column top transition connection component 5.

[0031] The pre-embedded anchor bolt 7 is a fully threaded component with a first nut anchor head 21 and an anchoring plate 22 in the middle. The pre-embedded anchor bolt 7 is connected to the column top conversion connection component 5 through the first nut anchor head 21 and the anchoring plate 22. The end of the pre-embedded anchor bolt 7 is provided with a pre-embedded steel plate 23. The pre-embedded anchor bolt 7, together with the pre-embedded steel plate 23, can fit tightly with the prefabricated cabin structure base. The pre-embedded anchor bolt 7 is firmly fixed in the column top conversion connection component 5 by the first nut anchor head 21, the anchoring plate 22 and the pre-embedded steel plate 23. The end of the pre-embedded steel plate 23 away from the first nut anchor head 21 is located outside the column top conversion connection component 5, and the pre-embedded steel plate protrudes about 5mm from the side wall of the column top conversion connection component, which facilitates the docking and installation of the structural beam 6 and the platform beam 8.

[0032] The prestressed anchor bolt 4 is a replaceable component. The precast foundation base 1, the precast column block unit 3, the column top conversion connection component 5, and the steel structure base of the precast substation cabin structure are all provided with anchor bolt installation holes 15. The anchor bolt installation holes 15 of the precast foundation base 1 are provided with embedded anchor plates 26 and second nut anchor heads 25. The lower end of the prestressed anchor bolt 4 is fixed by the second nut anchor head 25 to realize the connection between the prestressed anchor bolt 4 and the precast foundation base 1. During the assembly of the precast foundation and platform, the various components of the precast foundation and the steel structure base of the precast cabin structure are connected into a whole through the anchor bolt installation holes 15 reserved in the precast foundation base 1, the precast column block unit 3, the column top conversion connection component 5, and the steel structure base of the precast cabin structure.

[0033] The prestressed anchor bolt 4 includes a smooth circular section 28 and a threaded section 27. The smooth circular section 28 is fitted with a high-density plastic sleeve and sealed with anti-corrosion grease. Both ends of the prestressed anchor bolt 4 are provided with threaded sections 27. During assembly, the part of the prestressed anchor bolt 4 exposed above the column top transition connection component 5 has continuous threads. With the help of anti-loosening nuts, prestress can be applied in the prefabricated assembled foundation.

[0034] The top and bottom of the precast column block unit 3 are provided with water-stop strip fixing grooves 16, and water-swellable sealing strips 17 are installed in the water-stop strip fixing grooves 16. The water-swellable sealing strips 17 are used to achieve waterproof sealing of the joints of the foundation components during assembly. In addition, the splicing joints of the precast platform are provided with external water-stop strips. The water-stop strips and the water-swellable sealing strips 17 form "two lines of defense" for the precast precast foundation and platform, which can effectively improve the effectiveness of waterproofing of the precast precast foundation.

[0035] As can be seen from the above description, the solution of this application uses water-swellable waterproofing strip 17 and external waterproofing tape to achieve double-layer waterproofing at the joint, thereby improving the reliability of the solution.

[0036] The prefabricated platform is equipped with a platform railing beam 10 and a steel ladder 12. The steel ladder 12 is connected to the structural beam 6, and the lower end of the steel ladder 12 is connected to the prefabricated foundation base 1. During assembly, the steel ladder 12 and the structural beam 6 are fixed on site with bolts, and the lower end is fixed to the prefabricated foundation base 1 with expansion bolts. The platform railing beam 10 is connected to the end of the platform beam 8 away from the prefabricated platform. A platform railing 11 is installed on the platform railing beam 10, and the platform railing beam 10 is equipped with connectors for the platform railing 11 to facilitate the installation and fixing of the finished railing.

[0037] A steel grating plate 9 is installed on the platform beam 8. Two adjacent platform beams 8 are connected by the steel grating plate 9. The steel grating plate 9 is connected to the platform beam 8 by grating clips. Bolt holes are reserved on the platform beam 8 to facilitate the fixing of the grating clips.

[0038] In the application of this scheme, the structural beam 6, platform beam 8, platform railing beam 10 and steel ladder 12 are connected to the prefabricated foundation by on-site bolt fixing according to the foundation assembly scheme, and are assembled into a prefabricated platform foundation for the substation prefabricated cabin structure.

[0039] After the project's lifecycle ends, the structural beams 6, platform beams 8, platform railing beams 10, and steel ladders 12, among other steel structural components, can be dismantled, treated appropriately, and reused in the next project. The prefabricated foundation can be separated and dismantled by unscrewing the prestressed anchor bolts 4, allowing for the separation of the prefabricated foundation base 1, prefabricated column block units 3, and column top transition connection components 5. Due to their modular design, the prefabricated column block units 3 and column top transition connection components 5 can also be restored and reused in the next project if the damage does not affect their continued use. The installation and dismantling of the prefabricated foundation and platform are simple and convenient, have high residual value, generate less construction waste, and are beneficial to environmental protection.

[0040] The assembly and connection of the prefabricated foundation and platform of the substation prefabricated structure includes the following steps:

[0041] The first step is to lay out and position the precast foundation base 1 according to the dimensions of the precast cabin structure, excavate the foundation pit, pour the concrete cushion layer, and hoist the precast foundation base 1 into place.

[0042] The second step is to fix the prestressed anchor bolt 4 in the pre-embedded anchor plate 26 and the second nut anchor head 25 reserved in the precast foundation base 1;

[0043] The third step is to align the anchor bolt mounting holes 15 of the precast column block unit 3 with the position of the prestressed anchor bolt 4 and install it until the positioning pin 13 is fully inserted into the positioning pin mounting hole 19 and the shear key 18 is fully located in the shear key mounting groove 14; divide the number of precast column block units 3 according to the column top elevation, and repeat the installation of precast column block units 3 to the column top transition connection component 5.

[0044] The fourth step is to align the anchor bolt mounting hole 15 of the column top conversion connection component 5 with the positioning of the prestressed anchor bolt 4 and install it until the positioning pin 13 is fully inserted into the positioning pin mounting hole 19 and the shear key 18 is fully located in the shear key mounting groove 14.

[0045] The fifth step is to initially tighten the top nuts of the prestressed anchor bolts 4 to apply initial prestress to the prefabricated foundation. This increases the overall integrity of the foundation and facilitates the installation of structural beams and platform beams. It also ensures that the water-swellable sealing strip 17 is fully embedded in the sealing strip fixing groove 16. Then, the sealing strip is applied to the joints of the prefabricated foundation for waterproofing.

[0046] The sixth step is to symmetrically and orderly assemble the structural beams 6 and platform beams 8 onto the pre-embedded anchor bolts 7 of the column top conversion connection component 5, then install the platform fence beams 10, platform fences 11 and steel ladders 12 on the prefabricated platform, and finally install the steel grating 9.

[0047] In summary, the proposed solution enables factory prefabrication and on-site installation of prefabricated substation foundations and platforms, achieving green construction, convenient operation, and reliable quality. Prefabricated assembly foundations and platforms offer simple and convenient factory prefabrication, on-site assembly, installation, and dismantling, shortening the construction period, ensuring reliable quality, and being environmentally friendly and pollution-free. This aligns with national green construction policies and avoids the drawbacks of long construction cycles and difficulty in quality control associated with cast-in-place concrete foundations. It also reduces the impact of external weather conditions during construction, avoiding the adverse factors of winter construction, resulting in high construction efficiency and easily guaranteed assembly quality. Furthermore, different numbers of prefabricated column units can be used to meet the specific requirements of different projects, taking into account variations in foundation bearing capacity and foundation platform elevation. This solution is widely applicable to prefabricated substation structures and other similar cabin structures.

[0048] The standard parts used in this utility model are all purchased from the market according to actual application needs. Irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each structure all adopt conventional techniques such as bolt connections that are already mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, which will not be detailed here. Furthermore, the materials of each structural component in this application can be selected according to requirements and are not limited here. Content not described in detail in this specification belongs to the prior art known to those skilled in the art. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A prefabricated foundation and platform for a substation prefabricated cabin structure, characterized in that, The prefabricated structure adopts a modular design, including a prefabricated foundation base (1), prefabricated columns assembled on the prefabricated foundation base (1), and a column top conversion connection component (5) set on the top of the prefabricated columns. The prefabricated foundation base (1), prefabricated column block unit (3) and column top conversion connection component (5) are connected into a whole by prestressed anchor bolts (4) to form a prefabricated foundation. Two adjacent prefabricated foundations are connected by structural beams (6) to form a prefabricated platform. The prefabricated platform is connected to the steel structure base of the prefabricated cabin structure by prestressed anchor bolts (4). A platform beam (8) is set at the top of one side of the prefabricated platform. The precast column is an assembled structure, including precast column block units (3). The two adjacent precast column block units (3) are assembled and installed with positioning pins (13) and shear keys (18) to the precast foundation base (1) and the column top conversion connection component (5).

2. The prefabricated foundation and platform for a substation prefabricated cabin structure according to claim 1, characterized in that: The prefabricated foundation base (1) is equipped with lifting rings (2) at the center of each of its four sides.

3. The prefabricated foundation and platform for a substation prefabricated cabin structure according to claim 1, characterized in that: The precast column unit (3) has a positioning pin (13) at the middle of each of the four sides of the top, and a positioning pin mounting hole (19) adapted to the positioning pin (13) is reserved at the corresponding position of the bottom of the precast column unit (3); a shear key mounting groove (14) is provided at the middle of the top of the precast column unit (3), and a shear key (18) adapted to the shear key mounting groove (14) is provided at the middle of the bottom of the precast column unit (3).

4. The prefabricated foundation and platform for a substation prefabricated cabin structure according to claim 1, characterized in that: The side wall of the column top conversion connection component (5) is provided with a pre-embedded anchor bolt (7). The pre-embedded anchor bolt (7) is adapted to the structural beam (6) and the platform beam (8). The end of the pre-embedded anchor bolt (7) is exposed outside the column top conversion connection component (5).

5. The prefabricated foundation and platform for a substation prefabricated cabin structure according to claim 4, characterized in that: The pre-embedded anchor bolt (7) is a fully threaded component, with a first nut anchor head (21) and an anchor plate (22) in the middle. The end of the pre-embedded anchor bolt (7) is provided with a pre-embedded steel plate (23), and the end of the pre-embedded steel plate (23) away from the first nut anchor head (21) is located outside the column top conversion connection component (5).

6. The prefabricated foundation and platform for a substation prefabricated cabin structure according to claim 1, characterized in that: The prestressed anchor bolt (4) is a replaceable component. The precast foundation base (1), precast column block unit (3), column top conversion connection component (5) and steel structure base of the substation precast cabin structure are all provided with anchor bolt installation holes (15). The prestressed anchor bolt (4) is connected to the precast foundation base (1) through the pre-embedded anchor plate (26) and the second nut anchor head (25).

7. The prefabricated foundation and platform for a substation prefabricated cabin structure according to claim 6, characterized in that: The prestressed anchor (4) includes a smooth circular section (28) and a threaded section (27). The smooth circular section (28) is covered with a high-density plastic sleeve and sealed with anti-corrosion grease. Both ends of the prestressed anchor (4) are provided with threaded sections (27).

8. The prefabricated foundation and platform for a substation prefabricated cabin structure according to claim 1, characterized in that: The top and bottom of the precast column block unit (3) are provided with water-stop strip fixing grooves (16), and water-swellable water-stop strips (17) are provided in the water-stop strip fixing grooves (16); the splice joints of the assembled platform are provided with external water-stop strips.

9. The prefabricated foundation and platform for a substation prefabricated cabin structure according to claim 1, characterized in that: The prefabricated platform is provided with a platform fence beam (10) and a steel ladder (12). The steel ladder (12) is connected to the structural beam (6). The lower end of the steel ladder (12) is connected to the prefabricated foundation base (1). The platform fence beam (10) is connected to the end of the platform beam (8) away from the prefabricated platform. The platform fence beam (10) is provided with a platform fence (11).

10. The prefabricated foundation and platform for a substation prefabricated cabin structure according to claim 1, characterized in that: A steel grating (9) is installed on the platform beam (8), and two adjacent platform beams (8) are connected by the steel grating (9).

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