An assembled rolling mill foundation and pile foundation connecting device and construction method

Abstract

The application provides an assembled rolling mill foundation and pile foundation connecting device and a construction method, and relates to the technical field of building construction. The application discloses a sleeve system, which comprises a horizontally arranged mounting plate and a sleeve pipe connected vertically below the mounting plate, and the pipe cavity of the sleeve pipe and the plate surface of the mounting plate jointly enclose a bottom-open accommodating space; the top of the pile foundation enters the accommodating space through the opening, so that the sleeve pipe surrounds the outside of the top of the pile foundation; a steel bar passing hole is formed in the mounting plate and used for allowing the reserved steel bars of the pile foundation to pass through, and a profile steel mounting groove is also formed in the mounting plate; the lower end of the profile steel passes through the profile steel mounting groove and extends into the pipe cavity of the sleeve pipe, and the upper end of the profile steel can extend into the embedded steel pipe of the equipment foundation. The application has the beneficial effects of realizing quick connection with the pile body, greatly shortening the construction period, being firm and reliable at the connecting position, being excellent in overall anti-vibration performance, being able to effectively resist the vibration generated during equipment operation, and improving the safety during the construction process.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a prefabricated rolling mill foundation and pile foundation connection device and construction method. Background Technology

[0002] Traditional rolling mill archway equipment foundations are mostly constructed using large-volume cast-in-place concrete, resulting in long construction periods and a large amount of on-site work. Especially during the upgrading and renovation of equipment foundations in old plant buildings, construction and normal plant production interfere with each other, posing significant safety hazards. Steel plants have set a "short, quick, and efficient" requirement for equipment foundation construction, demanding that the renovation be completed without affecting plant production operations.

[0003] Prefabricated foundation construction, which involves assembling the foundation into several prefabricated modules, can significantly shorten on-site construction time and reduce the impact on production. However, achieving a reliable connection between the prefabricated foundation modules and the underlying pile foundation has become a key technical challenge restricting the widespread adoption of prefabricated construction.

[0004] Currently, although there are relevant technologies for pile-cap connection in the fields of prefabricated buildings and bridges, they are mostly designed for conventional building conditions and cannot meet the special requirements for the stiffness and bearing capacity of the connection nodes under the continuous vibration conditions of rolling mill equipment. Furthermore, the limited space for rolling mill foundation modification and the inconsistent quality of pile foundation forming further increase the difficulty of connection.

[0005] The existing technology has the following shortcomings:

[0006] 1. When the top of the pile foundation is uneven, the traditional leveling process is complex and time-consuming, making it difficult to meet the needs of rapid construction;

[0007] 2. The connection nodes lack effective load transfer and distribution structures, resulting in insufficient stability under vibration conditions;

[0008] 3. The positioning and connection of the pre-reserved steel bars in the pile foundation with the equipment foundation is difficult, and the installation accuracy is hard to control;

[0009] 4. The connection method is simple and lacks multiple anchoring mechanisms, making it prone to loosening or fatigue failure under long-term vibration.

[0010] Therefore, there is an urgent need for a prefabricated rolling mill foundation and pile foundation connection device and construction method to solve the above-mentioned technical problems. Summary of the Invention

[0011] The purpose of this invention is to provide a prefabricated rolling mill foundation and pile foundation connection device and construction method. For pre-cast equipment module foundations, the device utilizes pre-reserved openings in the archway base foundation to connect with the steel sections fixed to the pile foundation and the reinforcing bars on the piles. Anchoring is achieved through grouting, effectively solving the problem of insufficient stability of the equipment foundation under vibration conditions and improving the overall stiffness and load-bearing capacity of the connection node. The numerous technical effects of the preferred technical solutions provided by this invention are detailed below.

[0012] To achieve the above objectives, the present invention provides the following technical solution:

[0013] This invention provides a prefabricated rolling mill foundation and pile foundation connection device for connecting pile foundations and equipment foundations, comprising:

[0014] The sleeve system includes a horizontally mounted mounting plate and a sleeve vertically connected below the mounting plate. The cavity of the sleeve and the surface of the mounting plate together form a receiving space with an open bottom. The top of the pile foundation enters the receiving space through the opening, so that the sleeve surrounds the outside of the top of the pile foundation. The mounting plate has a rebar through hole for the reserved rebar of the pile foundation to pass through, and the mounting plate also has a steel section mounting groove.

[0015] The lower end of the steel profile passes through the steel profile installation groove and extends into the cavity of the sleeve, while the upper end of the steel profile can extend into the pre-embedded steel pipe of the equipment foundation.

[0016] Furthermore, a shear groove is formed at the pile core of the pile foundation extending downward from the top, and the lower end of the steel section extends into the shear groove.

[0017] Furthermore, it also includes a leveling component, which is welded to the reserved reinforcing bar, and the mounting plate is situated on the leveling component.

[0018] Furthermore, it also includes a putty layer, which is filled between the top surface of the mounting plate and the bottom surface of the equipment foundation.

[0019] Furthermore, it also includes a grouting layer and a reinforcing mesh. The grouting layer is poured into the pre-embedded steel pipe, and the reinforcing mesh is placed in the grouting layer to anchor the upper end of the steel section into the pre-embedded steel pipe.

[0020] Furthermore, the cross-sectional shape and size of the steel mounting groove are matched with the cross-section of the steel.

[0021] Furthermore, the surface area of ​​the mounting plate is larger than the opening area of ​​the sleeve.

[0022] Furthermore, the positions of the through holes of the reinforcing bars on the mounting plate correspond one-to-one with the positions of the reserved reinforcing bars on the pile foundation; the positions of the steel section mounting grooves on the mounting plate correspond one-to-one with the positions of the embedded steel pipes on the equipment foundation.

[0023] The present invention provides a construction method for the above-mentioned prefabricated rolling mill foundation and pile foundation connection device, comprising the following steps:

[0024] S1: Level the top of the pile foundation and open a shear groove at the pile core location, and roughen the inner wall of the shear groove.

[0025] S2: Fix the mounting plate and the sleeve together to form a sleeve system; cut through holes for the reinforcing bars on the mounting plate according to the layout position of the reserved reinforcing bars; cut the steel section mounting groove on the mounting plate according to the cross-sectional dimensions of the steel section.

[0026] S3: The sleeve system is fitted onto the top of the pile foundation, so that the reserved reinforcing bar passes through the reinforcing bar through hole;

[0027] S4: The steel section is embedded in the steel section mounting groove and fixed so that the lower end of the steel section extends into the cavity of the sleeve, forming an integrally connected pile foundation structure;

[0028] S5: Apply adhesive mortar to the top surface of the pile foundation structure, and then hoist the prefabricated equipment foundation module above the sleeve system, so that the upper end of the steel section extends into the pre-embedded steel pipe of the prefabricated equipment foundation module; the pile foundation and the equipment foundation are fixed as an integral structure.

[0029] Furthermore, step S3 also includes welding the leveling component to the reserved reinforcing bar, and after the sleeve system is fitted onto the top of the pile foundation, the mounting plate sits on the leveling component.

[0030] This invention provides a prefabricated rolling mill foundation and pile foundation connection device. A sleeve system 2 surrounds and constrains the top of the pile foundation 1, while an installation plate 21 disperses the vertical load transmitted from the equipment foundation 3. The load is then transferred to the pile foundation 1 via a steel section 4, forming a rigid force transmission path from the pile foundation 1 to the sleeve system 2, then to the steel section 4, and finally to the equipment foundation 3. The overall structure requires no on-site welding or extensive cast-in-place pouring; it only needs to be hoisted into place for rapid connection, significantly shortening the construction cycle. Simultaneously, the circumferential constraint of the sleeve 22 on the top of the pile foundation 1 and the insertion connection of the steel section 4 significantly improve the shear, bending, and pull-out resistance of the joint, effectively resisting the strong vibrations generated during rolling mill operation and ensuring long-term safety.

[0031] The construction method for the prefabricated rolling mill foundation and pile foundation connection device provided by this invention eliminates the need for large-scale formwork and reinforcement binding, as well as wet operations. This significantly shortens the construction cycle compared to traditional methods. The method is simple to operate, requiring only basic training for ordinary workers, thus reducing labor costs. Furthermore, it avoids extensive on-site welding and high-altitude work, significantly reducing safety risks, making it particularly suitable for the rapid renovation of confined spaces in old factory buildings. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the prefabricated rolling mill foundation and pile foundation connection device of the present invention;

[0034] Figure 2 yes Figure 1 Enlarged view of the details of the connection in the middle;

[0035] Figure 3 This is a schematic diagram of the sleeve system in the prefabricated rolling mill foundation and pile foundation connection device of the present invention;

[0036] Figure 4 yes Figure 3 A top-view structural diagram;

[0037] Figure 5 This is a schematic diagram of the pile foundation structure in the prefabricated rolling mill foundation and pile foundation connection device of the present invention;

[0038] Figure 6 This is a schematic diagram of the connection between the pile foundation and the sleeve system in the prefabricated rolling mill foundation and pile foundation connection device of the present invention;

[0039] Figure 7 This is a schematic diagram of the internal structure of the pile foundation in the prefabricated rolling mill foundation and pile foundation connection device of the present invention;

[0040] Figure 8 This is a schematic diagram of the structure during construction of the pile foundation in the prefabricated rolling mill foundation and pile foundation connection device of the present invention.

[0041] In the diagram: 1. Pile foundation; 11. Reserved reinforcing steel; 12. Leveling component; 13. Mortar layer; 14. Shear groove; 2. Sleeve system; 21. Mounting plate; 211. Reinforcing steel through hole; 212. Steel mounting groove; 22. Sleeve; 3. Equipment foundation; 4. Steel section. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0043] like Figure 1 and Figure 2 As shown, the present invention provides a prefabricated rolling mill foundation and pile foundation connection device for connecting pile foundation 1 and equipment foundation 3, including sleeve system 2 and steel section 4.

[0044] like Figure 3 and Figure 4 As shown, the sleeve system 2 includes a horizontally positioned mounting plate 21 and a vertically connected sleeve 22 below the mounting plate 21. The lumen of the sleeve 22 and the surface of the mounting plate 21 together form a receiving space with an open bottom. Figure 5 and Figure 6 As shown, the top of the pile foundation 1 enters the accommodating space through an opening, so that the sleeve 22 surrounds the outer side of the top of the pile foundation 1; the mounting plate 21 has a rebar through hole 211 for the reserved rebar 11 of the pile foundation 1 to pass through, and the mounting plate 21 also has a steel section mounting groove 212. The lower end of the steel section 4 passes through the steel section mounting groove 212 and extends into the cavity of the sleeve 22, and the upper end of the steel section 4 can extend into the pre-embedded steel pipe of the equipment foundation 3.

[0045] Specifically, in this embodiment, the mounting plate 21 is a horizontal steel plate, and the sleeve 22 is a vertical steel pipe, which are welded together. The cavity of the sleeve 22 and the bottom surface of the mounting plate 21 form a cylindrical accommodating space that is closed at the top and open at the bottom. The inner diameter of this space is slightly larger than the outer diameter of the top of the pile foundation 1, so that the top of the pile foundation 1 can be inserted from the bottom opening and surrounded by the sleeve 22. In this embodiment, the mounting plate 21 has several circular holes, namely, steel bar through holes 211, with a hole diameter slightly larger than the reserved steel bar diameter to allow the steel bar to pass through without obstruction. At the same time, a through groove with the same cross-sectional shape as the steel section 4, namely the steel section installation groove 212, is opened. The groove width and groove length match the outer contour of the cross-section of the steel section 4. The steel section is made of H-beam or I-beam. Its lower end is vertically inserted into the inner cavity of the sleeve 22 through the steel section installation groove 212 and extends to near the top of the pile. The upper end is higher than the mounting plate 21 by a certain length so as to be inserted into the pre-embedded steel pipe of the equipment foundation 3 later.

[0046] This prefabricated rolling mill foundation and pile foundation connection device uses a sleeve system 2 to surround and constrain the top of the pile foundation 1, utilizes an installation plate 21 to distribute the vertical load transmitted from the equipment foundation 3, and transfers the load to the pile foundation 1 through the steel section 4, forming a rigid force transmission path from the pile foundation 1 to the sleeve system 2, then to the steel section 4, and finally to the equipment foundation 3. The overall structure requires no on-site welding or extensive cast-in-place pouring; it only needs to be hoisted into place for rapid connection, significantly shortening the construction cycle. At the same time, the circumferential constraint of the sleeve 22 on the top of the pile foundation 1 and the insertion connection of the steel section 4 significantly improve the shear, bending, and pull-out resistance of the joint, effectively resisting the strong vibrations generated during the operation of the rolling mill and ensuring long-term safe use.

[0047] As an optional implementation method, such as Figure 7 As shown, the shear groove 14 is opened at the pile core of the pile foundation 1, extending downward from the top, and the lower end of the steel section 4 extends into the shear groove 14.

[0048] In this embodiment, a vertical groove, namely the shear groove 14, is formed at the top center of the pile foundation 1 using a water drill or manual chiseling. The groove depth is determined based on the insertion length of the steel section and should generally be as deep as possible. The inner wall of the shear groove 14 needs to be roughened to increase its roughness. After the lower end of the steel section 4 passes through the sleeve system 2, it is directly inserted into the shear groove 14. The lower end face of the steel section 4 can contact the bottom of the groove or leave a small gap for subsequent grouting. The cross-sectional dimensions of the shear groove 14 are slightly larger than the cross-section of the steel section 4 to facilitate installation and allow for the injection of bonding materials.

[0049] By setting the shear groove 14, a direct embedded anchoring position is provided for the lower end of the steel section 4. When the horizontal impact force of the rolling mill acts on the equipment foundation 3, the steel section 4 transmits the shear force to the concrete of the side wall of the shear groove 14. It relies on the bearing pressure and friction resistance of the groove wall to resist the horizontal displacement, which greatly improves the shear stiffness of the connection node and avoids the slippage failure caused by the steel section 4 and the top of the pile foundation 1 relying only on mortar or friction to transmit force.

[0050] As an optional implementation method, such as Figure 8 As shown, it also includes a leveling component 12, which is welded to the reserved reinforcing bar 11, and the mounting plate 21 sits on the leveling component 12. In this embodiment, the leveling component 12 is a small steel pad or steel plate, and its thickness can be selected according to the actual elevation deviation of the pile top. After the top of the pile foundation is leveled, if the concrete surface of the pile top is uneven or the elevation difference is large, the leveling component 12 is welded to the root or side wall of the reserved reinforcing bar 11 to make its top surface at the same design elevation. After the mounting plate 21 is inserted into the reserved reinforcing bar 11, its bottom surface directly rests on the top surface of the leveling component 12, thereby ensuring that the mounting plate 21 is level and the elevation is accurate, without the need to apply a thick layer of mortar to the pile top for leveling.

[0051] By setting up the leveling component 12, the problem of inconsistent pile foundation forming quality on site is solved. It replaces the traditional complex and time-consuming secondary leveling process at the top of the pile. The elevation and flatness of the installation plate can be quickly adjusted by simply welding the pad, ensuring the installation accuracy of the subsequent steel section 4 and equipment foundation 3. At the same time, it avoids the decrease in bearing capacity or cracking in the later stage due to excessive leveling layer.

[0052] As an optional implementation, a putty layer 13 is also included, which fills the space between the top surface of the mounting plate 21 and the bottom surface of the equipment foundation 3. In this embodiment, the putty is made of high-strength epoxy resin or polymer cement-based putty. Before the equipment foundation is hoisted, a certain thickness of putty, such as 3-5 mm, is applied to the top surface of the mounting plate 21. After the equipment foundation 3 is in place, the putty is squeezed and filled into the tiny gaps between the top surface of the mounting plate 21 and the bottom surface of the equipment foundation 3, forming a uniform adhesive layer. The putty layer not only effectively transmits vertical pressure but also buffers the vibration energy generated during equipment operation, playing a damping role. Simultaneously, the adhesive force of the putty connects the equipment foundation 3 and the mounting plate 21 into a single unit, preventing horizontal relative slippage and enhancing overall integrity. Furthermore, the putty has a short setting time, allowing for rapid load-bearing and shortening the construction period.

[0053] As an optional implementation, it also includes a grouting layer and a steel mesh. The grouting layer is poured into the pre-embedded steel pipe, and the steel mesh is set in the grouting layer to anchor the upper end of the steel section 4 into the pre-embedded steel pipe.

[0054] In this embodiment, the pre-embedded steel pipe is a vertical steel pipe embedded during the prefabrication of the equipment foundation 3, and its inner diameter is larger than the cross-sectional dimensions of the steel section 4. After the upper end of the steel section 4 extends into the pre-embedded steel pipe, high-strength non-shrink grout, such as GMC grout, is injected into the pipe, and pre-tied or cut steel mesh is placed inside. After the grout solidifies, the steel mesh is encased within it, forming an integral anchor body with the flange of the steel section 4 and the pipe wall, firmly anchoring the upper end of the steel section 4 to the equipment foundation 3. By setting up a secondary anchoring structure with grout and steel mesh, the connection strength between the steel section 4 and the equipment foundation 3 is greatly enhanced. It can not only withstand upward pull-out forces but also evenly transfer the foundation load to the steel section 4, avoiding stress concentration. The steel mesh further increases the crack resistance and integrity of the grout body, ensuring that it does not loosen or fail due to fatigue under long-term vibration.

[0055] As an optional implementation, the cross-sectional shape and dimensions of the steel section mounting groove 212 match the cross-section of the steel section 4. In this embodiment, the steel section mounting groove 212 is a rectangular or H-shaped elongated groove. Its width is equal to the flange width or web thickness of the steel section 4, depending on the steel section embedding direction, and its length is equal to the height or width of the steel section. The specific dimensions perfectly match the outer contour of the selected steel section 4, allowing the steel section to be tightly embedded. The gap between the groove edge and the surface of the steel section 4 is controlled within 1~2mm. The tightly matched mounting groove ensures accurate positioning of the steel section in the horizontal direction, and after embedding, the groove wall provides lateral restraint to the steel section, preventing the steel section from rotating or displacing during vibration, while ensuring the verticality of the vertical force transmission path and avoiding eccentric loading.

[0056] As an optional implementation, the surface area of ​​the mounting plate 21 is larger than the opening area of ​​the sleeve 22. Specifically, the mounting plate 21 is a square or circular steel plate, and its outer contour dimension is significantly larger than the outer diameter of the sleeve 22. That is, the mounting plate 21 extends outward with a certain width around its perimeter. Increasing the area of ​​the mounting plate 21 can effectively disperse the concentrated load transmitted by the equipment foundation 3 to a larger area of ​​the pile top, reduce the local compressive stress of the pile top concrete, and avoid pile top crushing or uneven settlement caused by excessive stress. This is especially suitable for high-load conditions of heavy rolling mill equipment and improves the safety of the foundation.

[0057] In this embodiment, the positions of the reinforcing bar through holes 211 on the mounting plate 21 correspond one-to-one with the positions of the reserved reinforcing bars 11 on the pile foundation 1; the positions of the steel section mounting grooves 212 on the mounting plate 21 correspond one-to-one with the positions of the embedded steel pipes on the equipment foundation 3. No on-site measurement and adjustment are required, significantly reducing high-altitude operations and manual intervention, improving construction efficiency and installation accuracy, while avoiding component damage or connection failure due to forced installation.

[0058] The present invention also provides a construction method for the above-mentioned prefabricated rolling mill foundation and pile foundation connection device, comprising the following steps:

[0059] S1: Level the top of pile 1 and open shear groove 14 at the pile core position, and roughen the inner wall of shear groove 14; during construction, use a pneumatic pick or manual chisel to remove the laitance and uneven layer at the top of the pile to expose the fresh concrete surface and ensure that the top surface is level; use a core drill or impact drill to open a vertical shear groove in the pile core, the groove depth is according to the design, and the inner wall is roughened with a steel chisel to increase the roughness.

[0060] S2: Fix the mounting plate 21 and sleeve 22 together to form a sleeve system 2; cut through the reinforcing bars 11 to the mounting plate 21 according to the layout of the reserved reinforcing bars 11; cut the steel section mounting groove 212 on the mounting plate 21 according to the cross-sectional dimensions of the steel section 4; wherein, the mounting plate 21 and sleeve 22 are welded together in the factory, and the weld is fully welded. According to the design drawings, use plasma cutting or water cutting to open round holes and long grooves on the mounting plate 21, and grind the edges of the holes and grooves smooth.

[0061] S3: Place the sleeve system 2 on the top of the pile foundation 1, so that the reserved steel bars 11 pass through the steel bar through hole 211. Insert the sleeve system 2 from top to bottom from the top of the pile, so that all the reserved steel bars 11 pass through the corresponding steel bar through hole 211, and the bottom of the sleeve 22 rests on the top of the pile or the leveling part 12.

[0062] To further improve the adaptability to different pile foundation forming qualities, the leveling component 12 is welded to the reserved steel bar 11, the sleeve system 2 is fitted on the top of the pile foundation 1, and the mounting plate 21 is placed on the leveling component 12. In this way, even if there is a large deviation at the top of the pile, it can be quickly and accurately leveled by welding the leveling component.

[0063] During construction, based on the actual elevation measurement of the pile top, a leveling component 12 is welded onto the reserved reinforcing steel, and its top surface is adjusted to the design elevation. Then, the sleeve system 2 is fitted in, so that the bottom surface of the mounting plate 21 naturally rests on the top surface of the leveling component 12, ensuring that the mounting plate 21 is level. If the pile top itself is relatively flat, a leveling component is not required.

[0064] S4: The steel section 4 is embedded in the steel section installation groove 212 and fixed so that the lower end of the steel section 4 extends into the cavity of the sleeve 22 to form an integrally connected pile foundation structure; specifically, the steel section 4 is inserted from the steel section installation groove above the mounting plate 21, and the lower end passes through the inner cavity of the sleeve 22 into the shear groove 14, and the verticality is adjusted. If necessary, temporary wedges are added to the side of the groove for fixation.

[0065] S5: Apply mortar to the top surface of the pile foundation structure, then hoist the precast equipment foundation module above the sleeve system 2, so that the upper end of the steel section 4 extends into the pre-embedded steel pipe of the precast equipment foundation module; the pile foundation 1 and the equipment foundation 3 are fixed as an integral structure. During construction, after applying mortar to the top surface of the mounting plate 21, use a crane to lift the precast equipment foundation module, align it with the upper end of the steel section and the position of the pre-embedded steel pipe, and slowly lower it into place so that the upper end of the steel section is inserted into the steel pipe. At the same time, the mortar on the bottom surface of the foundation is squeezed to a uniform thickness; then grout is poured into the pre-embedded steel pipe and a steel mesh is placed in, and after curing, it forms an integral structure.

[0066] The construction method for this prefabricated rolling mill foundation and pile foundation connection device eliminates the need for large-scale formwork and reinforcement binding, as well as wet work. This significantly shortens the construction cycle compared to traditional methods. The operation is simple, and ordinary workers can learn to use it after minimal training, reducing labor costs. Simultaneously, it avoids extensive on-site welding and high-altitude work, significantly reducing safety risks, making it particularly suitable for the rapid renovation of confined spaces in old factory buildings.

[0067] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A prefabricated rolling mill foundation and pile foundation connection device for connecting pile foundation (1) and equipment foundation (3), characterized in that, include: The sleeve system (2) includes a horizontally arranged mounting plate (21) and a sleeve (22) vertically connected to the bottom of the mounting plate (21). The cavity of the sleeve (22) and the plate surface of the mounting plate (21) together form a receiving space with an open bottom. The top of the pile foundation (1) enters the receiving space through the opening, so that the sleeve (22) surrounds the outside of the top of the pile foundation (1). The mounting plate (21) is provided with a steel bar through hole (211) for the reserved steel bar (11) of the pile foundation (1) to pass through, and the mounting plate (21) is also provided with a steel section mounting groove (212). The lower end of the steel section (4) passes through the steel section installation groove (212) and extends into the cavity of the sleeve (22), while the upper end of the steel section (4) can extend into the pre-embedded steel pipe of the equipment foundation (3).

2. The prefabricated rolling mill foundation and pile foundation connection device according to claim 1, characterized in that: The shear groove (14) is opened at the pile core of the pile foundation (1) extending downward from the top, and the lower end of the steel section (4) extends into the shear groove (14).

3. A prefabricated rolling mill foundation and pile foundation connection device according to claim 1 or 2, characterized in that: It also includes a leveling component (12), which is welded to the reserved reinforcing bar (11), and the mounting plate (21) is located on the leveling component (12).

4. A prefabricated rolling mill foundation and pile foundation connection device according to claim 1 or 2, characterized in that: It also includes a putty layer (13) that fills the space between the top surface of the mounting plate (21) and the bottom surface of the equipment base (3).

5. A prefabricated rolling mill foundation and pile foundation connection device according to claim 1 or 2, characterized in that: It also includes a grouting layer and a steel mesh. The grouting layer is poured into the pre-embedded steel pipe, and the steel mesh is set in the grouting layer to anchor the upper end of the steel section (4) into the pre-embedded steel pipe.

6. A prefabricated rolling mill foundation and pile foundation connection device according to claim 1 or 2, characterized in that: The cross-sectional shape and size of the steel mounting groove (212) are matched with the cross-section of the steel (4).

7. A prefabricated rolling mill foundation and pile foundation connection device according to claim 1 or 2, characterized in that: The surface area of ​​the mounting plate (21) is larger than the opening area of ​​the sleeve (22).

8. A prefabricated rolling mill foundation and pile foundation connection device according to claim 1 or 2, characterized in that: The position of the reinforcing bar through hole (211) on the mounting plate (21) corresponds one-to-one with the position of the reserved reinforcing bar (11) on the pile foundation (1); the position of the steel section mounting groove (212) on the mounting plate (21) corresponds one-to-one with the position of the embedded steel pipe on the equipment foundation (3).

9. A construction method for a prefabricated rolling mill foundation and pile foundation connection device as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Flatten the top of the pile foundation (1) and open a shear groove (14) at the pile core position, and roughen the inner wall of the shear groove (14); S2: Fix the mounting plate (21) and the sleeve (22) together to form a sleeve system (2); cut the reinforcing bar through hole (211) on the mounting plate (21) according to the layout position of the reserved reinforcing bar (11); cut the steel section mounting groove (212) on the mounting plate (21) according to the cross-sectional size of the steel section (4). S3: The sleeve system (2) is fitted onto the top of the pile foundation (1) so that the reserved steel bar (11) passes through the steel bar through hole (211). S4: The steel section (4) is embedded in the steel section mounting groove (212) and fixed so that the lower end of the steel section (4) extends into the cavity of the sleeve (22) to form an integrally connected pile foundation structure; S5: Apply mortar (13) to the top surface of the pile foundation structure, and then hoist the prefabricated equipment foundation module (3) above the sleeve system (2) so that the upper end of the steel section (4) extends into the pre-embedded steel pipe of the prefabricated equipment foundation module (3); the pile foundation (1) and the equipment foundation (3) are fixed as an integral structure.

10. The construction method of the prefabricated rolling mill foundation and pile foundation connection device according to claim 9, characterized in that: Step S3 also includes welding the leveling component (12) to the reserved reinforcing bar (11), and after the sleeve system (2) is fitted onto the top of the pile foundation (1), the mounting plate (21) sits on the leveling component (12).

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