Multilayer intelligent fabricated modular prefabricated foundation for building

Abstract

The application relates to a prefabricated foundation for multi-layer intelligent assembly type modular house construction, which comprises a rectangular ring beam and a bottom valve plate located in the rectangular ring beam, a plug plate gap is left between the rectangular ring beam and the bottom valve plate, four corners of the bottom valve plate are connected with four corners of the rectangular ring beam through adjusting mechanisms, during construction, the prefabricated foundation is placed in a foundation pit, the height of the bottom valve plate is adjusted to a set height through the adjusting mechanisms, the bottom valve plate is leveled, then primary grouting is carried out below the bottom valve plate, after the primary grouting is solidified, the height of the rectangular ring beam is adjusted upward to the set height through the adjusting mechanisms, the rectangular ring beam is leveled, then secondary grouting is carried out below the rectangular ring beam and in the plug plate gap, the application not only improves the construction precision and reliability of the modular house foundation, but also reduces the rework and correction cost caused by the uneven foundation, and has good engineering applicability and economic benefits.

Description

Technical Field

[0001] This invention relates to the field of basic technology, and in particular to the field of basic modular housing, specifically referring to a prefabricated foundation for multi-story intelligent prefabricated modular housing construction. Background Technology

[0002] Modular housing, as an efficient and environmentally friendly building form, has been widely used in recent years. Its core construction method involves directly hoisting prefabricated modules to the site for assembly. Multi-story modular houses, due to their greater height and weight, place higher demands on the stability and precision of the foundation structure. Currently, common prefabricated foundations typically combine rectangular ring beams with a bottom valve plate, and are fixed in the foundation pit by concrete grouting. However, in actual construction, the bottom of the foundation pit is often uneven, making it difficult to achieve a level position immediately after placement. Furthermore, during grouting, the buoyancy of the concrete and the vibration generated by compaction can easily cause foundation displacement or tilting. If the foundation is not leveled, the entire superstructure will tilt, posing a serious safety hazard. In addition, traditional prefabricated foundations are difficult to adjust during grouting; once tilting occurs, repair costs are high and the construction period is long. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a prefabricated foundation for multi-story intelligent modular prefabricated housing construction.

[0004] This invention is achieved through the following technical solution: providing a prefabricated foundation for multi-layer intelligent prefabricated modular housing construction, including a rectangular ring beam and a bottom valve plate located within the rectangular ring beam. A ring of insert plates is left between the rectangular ring beam and the bottom valve plate. The four corners of the bottom valve plate are respectively connected to the four corners of the rectangular ring beam through adjustment mechanisms. The four adjustment mechanisms are used to adjust the relative height of the four corners of the bottom valve plate and the four corners of the rectangular ring beam. During construction, the prefabricated foundation is placed in the foundation pit. The height of the bottom valve plate is adjusted to the set height and leveled by the adjustment mechanisms. Then, grouting is performed under the bottom valve plate. After the first grouting has solidified, the height of the rectangular ring beam is adjusted upward to the set height and leveled by the adjustment mechanisms. Then, grouting is performed under the rectangular ring beam and the insert plate joint.

[0005] In this design, the bottom valve plate and the rectangular ring beam are separate structures. Four adjustment mechanisms are used to adjust the relative height of the four corners of the bottom valve plate and the four corners of the rectangular ring beam. The bottom valve plate is fixed by grouting, and then the rectangular ring beam is lifted and fixed by the bottom valve plate, thereby fixing the rectangular ring beam during the second grouting and ensuring the level of the precast foundation.

[0006] As an optimization, a ring of templates is vertically inserted into the joint of the insert plate before the first grouting, and removed after the first grouting has solidified. The templates in this design prevent concrete from entering below the rectangular ring beam during the first grouting, causing it to accumulate below the bottom valve plate, thus effectively supporting the bottom valve plate.

[0007] As an optimization, valve plate reinforcement extends outward from the edge of the bottom valve plate, and a horizontal reinforcing sleeve is fixed inside the rectangular ring beam. The ring beam reinforcement is inserted into the reinforcing sleeve. Before the template is inserted, the ring beam reinforcement is pulled outward so that it does not insert into the space between the valve plate reinforcement and the rectangular ring beam. After the template is removed and before secondary grouting, the ring beam reinforcement is inserted inward so that the ring beam reinforcement and the valve plate reinforcement coincide in the length direction. Since the bottom valve plate and the rectangular ring beam in this application adopt a separate structure, in order to achieve a stable connection between the two and prevent concrete breakage at the joint of the insertion plate after completion, the optimal solution is to set the ring beam reinforcement and the valve plate reinforcement alternately and coincide in the length direction. However, if this is set, the template cannot be inserted. Therefore, the ring beam reinforcement set in this solution can move in the reinforcing sleeve, thereby realizing the function of template insertion. At the same time, after the template is removed, the ring beam reinforcement and the valve plate reinforcement can be made to coincide in the length direction, improving the connection strength between the bottom valve plate and the rectangular ring beam.

[0008] As an optimization, the ring beam reinforcement and valve plate reinforcement are staggered in the horizontal direction to prevent interference between them.

[0009] As an optimization, the adjustment mechanism includes a support plate detachably fixed to the rectangular ring beam and a screw vertically connected to the support plate. The adjustment mechanism also includes an angle steel fixed to the corner of the bottom valve plate, two vertically arranged limiting baffles fixed to the angle steel, and a threaded tube located between the two limiting baffles. The screw passes through the limiting baffles and is threadedly connected to the threaded tube. Rotation of the screw drives the threaded tube to move up and down, thereby causing the bottom valve plate and the rectangular ring beam to move relative to each other vertically via the two limiting baffles. In this design, the rotation of the screw drives the threaded tube to move up and down, and the threaded tube is located between the two limiting baffles, thus causing the limiting baffles to move up and down via the threaded tube. Simultaneously, a certain angle of inclination is allowed between the bottom valve plate and the rectangular ring beam.

[0010] As an optimization, the support plate is fixed to the vertical column sleeve, and a vertical support column is fixed to the rectangular ring beam. The column sleeve is fitted onto the support column, and both the support column and the column sleeve have insertion holes. A pin passes through both the insertion holes to secure the column sleeve and the support column. This design, with the column sleeve fitted onto the support column and connected by a pin, achieves a detachable connection between the support plate and the rectangular ring beam.

[0011] As an optimization, insertion holes are provided at the bottom of the modular house. During installation, support columns are inserted into these holes, and bolts are passed through both the modular house and the column insertion holes. The support columns in this design, while functioning as support plates, can also connect to the modular house, achieving its multi-functional purpose.

[0012] As an optimization, the diameter of the through hole through the limiting baffle of the screw is larger than the outer diameter of the screw, and both the upper and lower ends of the threaded tube are spherical. In this design, the diameter of the through hole through the limiting baffle of the screw is larger than the outer diameter of the screw, so that the screw can have a certain angle with respect to the axis of the through hole, thereby achieving a certain tilt angle between the bottom valve plate and the rectangular ring beam. At the same time, the spherical structure, through contact with the limiting baffle, also allows the limiting baffle and the upper end face of the threaded tube to have a certain tilt angle.

[0013] As an optimization, the side of the threaded tube has a groove for engaging with the end of the angle steel. This groove in the design restricts the rotation of the threaded tube.

[0014] As an optimization, the bottom valve plate has multiple grouting holes. These grouting holes in this design are used for a single grouting process, facilitating the filling of the area below the bottom valve plate with concrete.

[0015] The beneficial effects of this invention are as follows: This invention provides a prefabricated foundation for multi-layer intelligent prefabricated modular housing construction. By setting up a rectangular ring beam, a bottom valve plate, and adjustment mechanisms at the four corners, it achieves phased leveling and grouting of the prefabricated foundation during construction, effectively solving the problem of tilting caused by uneven foundation pits and grouting vibrations in traditional foundations. Specifically, the adjustment mechanisms allow for independent height adjustment and level calibration of the bottom valve plate and rectangular ring beam, ensuring that each structural layer is at the design elevation and level before and after grouting. The initial grouting below the bottom valve plate provides preliminary fixation, and after solidification, a secondary leveling and grouting of the rectangular ring beam is performed, significantly improving the overall flatness and stability of the foundation. The installation of the insert plate joint and template facilitates the isolation and implementation of grouting operations, while the adjustable design of the ring beam reinforcement and valve plate reinforcement enhances the connection strength between components. Furthermore, the adjustment mechanism adopts a detachable screw and sleeve structure with anti-stick treatment on the surface, making it easy to remove after grouting without affecting the overall integrity of the foundation. This invention not only improves the construction accuracy and reliability of modular housing foundations, but also reduces rework and correction costs caused by uneven foundations, demonstrating good engineering applicability and economic benefits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure after the invention is installed;

[0017] Figure 2 This is a schematic diagram of the installation process of the present invention;

[0018] Figure 3 This is a schematic diagram of the rectangular ring beam of the present invention;

[0019] Figure 4 This is a schematic diagram of the bottom valve plate of the present invention;

[0020] Figure 5 This is a schematic diagram of the bottom valve plate and adjusting mechanism of the present invention;

[0021] Figure 6 This is a schematic diagram of the adjustment mechanism of the present invention;

[0022] Figure 7 This is a horizontal cross-sectional view of the position of the threaded tube in the adjustment mechanism of the present invention;

[0023] Figure 8 This is a schematic diagram of the structure of the threaded tube of the present invention;

[0024] Figure 9 This is a front view of the present invention;

[0025] Figure 10 When the precast foundation of this invention is first placed into the foundation pit Figure 9 Sectional view of plane AA;

[0026] Figure 11 For the present invention Figure 10 A magnified view of a portion of the image;

[0027] Figure 12 After the first grouting of the present invention Figure 9 Sectional view of plane AA;

[0028] Figure 13 For the present invention Figure 12 A magnified view of a portion of the image;

[0029] Figure 14 Before secondary grouting of this invention Figure 9 Sectional view of plane AA;

[0030] Figure 15 For the present invention Figure 14 A magnified view of a portion of the image;

[0031] Figure 16 This is a schematic diagram of the structure after the invention is installed;

[0032] As shown in the figure:

[0033] 1. Rectangular ring beam, 2. Bottom valve plate, 3. Adjustment mechanism, 4. Valve plate reinforcement, 5. Ring beam reinforcement, 6. Reinforcement sleeve, 7. Support column, 8. Column insertion hole, 9. Template, 10. Grouting hole, 31. Column sleeve, 32. Support plate, 33. Screw, 34. Limiting baffle, 35. Threaded pipe, 36. Angle steel, 37. Handle, 38. Reinforcing plate, 39. Sleeve insertion hole. Detailed Implementation

[0034] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0035] like Figures 1-16 As shown, a prefabricated foundation for a multi-story intelligent modular prefabricated house according to the present invention includes a rectangular ring beam 1 and a bottom valve plate 2 located within the rectangular ring beam 1, as follows: Figure 3 As shown, the rectangular ring beam 1 has a width of 200-300mm and a height of 200-400mm. The internal space is rectangular and used to house the rectangular bottom valve plate 2. The rectangular ring beam 1 is cast from concrete in the factory and contains a steel reinforcement cage.

[0036] Vertical support columns 7 are fixed to the four corners of the rectangular ring beam 1. The support columns 7 are vertical rectangular tubes with their lower ends flush with the lower end of the rectangular ring beam 1 and their upper ends higher than the rectangular ring beam 1. The interior of the support columns 7 can also be used for grouting.

[0037] The support column 7 has a column insertion hole 8, and there is an insertion hole at the bottom of the modular house. When the modular house is installed, the support column 7 is inserted into the insertion hole, and bolts are passed through the modular house and the column insertion hole 8 to achieve the connection between the modular house and the prefabricated foundation.

[0038] The bottom valve plate 2 is a horizontal concrete slab with a steel mesh inside. The ends of the valve plate steel bars 4 of the steel mesh protrude from the edge. The bottom valve plate 2 has multiple grouting holes 10 for easy grouting.

[0039] A groove is left between the rectangular ring beam 1 and the bottom valve plate 2. The end of the valve plate reinforcing bar 4 is located inside the groove, and the end of the valve plate reinforcing bar 4 is 10-25mm away from the inner ring of the rectangular ring beam 1. This allows a ring of formwork 9 to be vertically inserted into the groove before the first grouting. This prevents concrete from entering below the rectangular ring beam during the first grouting, causing it to accumulate below the bottom valve plate and effectively support the bottom valve plate.

[0040] The four corners of the bottom valve plate 2 are connected to the four corners of the rectangular ring beam 1 through the adjustment mechanism 3. The four adjustment mechanisms 3 are used to adjust the relative height of the four corners of the bottom valve plate 2 and the four corners of the rectangular ring beam 1. Since the four corners are adjusted individually, the horizontal relationship between the bottom valve plate 2 and the rectangular ring beam 1 can also be adjusted.

[0041] like Figure 6 As shown, the adjustment mechanism 3 includes a support plate 32 detachably fixed to the rectangular ring beam 1 and a screw 33 vertically connected to the support plate 32. The support plate 32 is horizontally fixed to the vertical column sleeve 31. To improve the connection rigidity and strength, a stiffening plate 38 is welded above the support plate 32. The column sleeve 31 is a rectangular tube with its inner hole fitting with the outer wall of the support column 7, so that the column sleeve 31 can be fitted onto the support column 7. The column sleeve 31 has a sleeve insertion hole 39. A pin passes through the column insertion hole 8 and the sleeve insertion hole 39 to fix the column sleeve 31 and the support column 7. This achieves the detachable and fixed connection of the support plate 32 to the rectangular ring beam 1.

[0042] The screw 33 is vertically arranged and rotatably connected to the support plate 32 through a bearing. The screw 33 can be driven to rotate by a power tool. When the weight of the precast foundation is small, it can be manually rotated by a crank 37 welded to the upper end of the screw 33.

[0043] The adjustment mechanism 3 also includes an angle steel 36 fixed to the corner of the bottom valve plate 2, two vertically arranged limiting baffles 34 fixed to the angle steel 36, and a threaded pipe 35 located between the two limiting baffles 34. The angle steel 36 is embedded in the four corners of the bottom valve plate 2. Both limiting baffles 34 are arranged horizontally. The threaded pipe 35 is located between the two limiting baffles 34 and can have a vertical movement of 1-3mm to ensure that the threaded pipe 35 can tilt to a certain extent.

[0044] The screw 33 passes through the limiting baffle 34 and is threadedly connected to the threaded tube 35. The rotation of the screw 33 drives the threaded tube 35 to move up and down, thereby causing the bottom valve plate 2 and the rectangular ring beam 1 to move up and down relative to each other through the two limiting baffles 34. Since the bottom valve plate 2 and the rectangular ring beam 1 are not both kept horizontal during adjustment, there may be a certain tilt angle between the bottom valve plate and the rectangular ring beam.

[0045] The diameter of the through hole through the limiting baffle 34 of the screw 33 is larger than the outer diameter of the screw 33, and both the upper and lower ends of the threaded tube 35 are spherical. In this design, the diameter of the through hole through the limiting baffle of the screw is larger than the outer diameter of the screw, so that the screw can have a certain angle with respect to the axis of the through hole, thereby achieving a certain tilt angle between the bottom valve plate and the rectangular ring beam. At the same time, the spherical structure, through contact with the limiting baffle, also allows the limiting baffle and the upper end face of the threaded tube to have a certain tilt angle.

[0046] To prevent the threaded tube 35 from rotating along with the screw 33, such as Figure 7 As shown, the side of the threaded tube 35 has a groove that is locked onto the end of the angle steel 36. The groove can restrict the rotation of the threaded tube, and the groove is slightly larger than the size of the end of the angle steel 36.

[0047] Since the bottom valve plate and rectangular ring beam in this application are separate structures, the optimal solution to ensure a stable connection between them and prevent concrete breakage at the joint between the insert plates after completion is to stagger the ring beam reinforcement and the valve plate reinforcement, making them coincident in the length direction. However, this arrangement would prevent the insertion of the formwork. Therefore, in this embodiment, valve plate reinforcement 4 extends outward from the edge of the bottom valve plate 2, and a horizontal reinforcing sleeve 6 is fixed inside the rectangular ring beam 1. The ring beam reinforcement 5 is inserted into the reinforcing sleeve 6. Before the formwork 9 is inserted, the ring beam reinforcement 5 is pulled outward so that it does not insert into the space between the valve plate reinforcement 4 and the rectangular ring beam 1. After the formwork 9 is removed and before secondary grouting, the ring beam reinforcement 5 is inserted inward so that the ring beam reinforcement 5 and the valve plate reinforcement 4 coincide in the length direction. The ring beam reinforcement 5 and the valve plate reinforcement 4 are staggered in the horizontal direction.

[0048] like Figure 11 , 13 As shown in Figure 15, the ring beam reinforcement in this embodiment can move within the reinforcement sleeve, thereby enabling the template insertion function. Simultaneously, after the template is removed, the ring beam reinforcement and the valve plate reinforcement can overlap in the length direction, improving the connection strength between the bottom valve plate and the rectangular ring beam.

[0049] How to use this invention:

[0050] During transportation, the bottom valve plate 2 and the rectangular ring beam 1 are connected as a whole through four adjusting mechanisms 3. During construction, the precast foundation is placed in the foundation pit by a crane. Figure 10 As shown, the lower end of the rectangular ring beam 1 is supported at the bottom of the foundation pit. At this time, due to the unevenness of the foundation pit, the entire rectangular ring beam 1 and the bottom valve plate 2 are tilted and cannot be guaranteed to be horizontal.

[0051] The height of the bottom valve plate 2 is adjusted to the set height by adjusting mechanism 3 and the bottom valve plate 2 is leveled. The set height here is the bottom valve plate 2 height required by the design, which is generally lower than the ground to allow for backfilling or floor installation above the bottom valve plate 2. At this time, the bottom valve plate 2 remains horizontal, and the rectangular ring beam 1 is still in an inclined state.

[0052] Pull the ring beam reinforcement 5 outwards so that its end is flush with the inner ring of the rectangular ring beam 1, thus preventing the ring beam reinforcement 5 from being inserted into the space between the valve plate reinforcement 4 and the rectangular ring beam 1, facilitating the entry and exit of the formwork. Then, insert multiple formwork panels 9 through the insertion plate joints and tap them downwards to drive them into the soil for fixation. Figure 2 The diagram shows multiple templates 9 being inserted downwards in sequence.

[0053] Then, grouting is performed under the bottom valve plate 2 through the grouting hole 10. Concrete is used for grouting, and the concrete fills the area under the bottom valve plate 2 after the first grouting. After the first grouting solidifies, the formwork 9 is removed, and the height of the rectangular ring beam 1 is adjusted upward to the set height through the adjusting mechanism 3 and the rectangular ring beam 1 is leveled. The set height at this time is the height of the rectangular ring beam 1 designed at that time, which is generally flush with or slightly lower than the ground. At this time, the bottom of the rectangular ring beam 1 is separated from the bottom of the foundation pit.

[0054] Then insert the ring beam reinforcement 5 inward so that the ring beam reinforcement 5 and the valve plate reinforcement 4 coincide in the length direction, as shown. Figure 16 As shown, although the ring beam reinforcement 5 and the valve plate reinforcement 4 are staggered, they overlap in length, thereby improving the connection strength between the bottom valve plate 2 and the rectangular ring beam 1 through the interlocking effect.

[0055] Then, secondary grouting is carried out on the area below the rectangular ring beam 1 and the joint of the insert plate. Concrete is used for secondary grouting, and grouting is performed from the joint of the insert plate, the outside of the rectangular ring beam 1, and the inside of the supporting column 7.

[0056] After the secondary grout has solidified, rotate the handle 37 to unscrew the screw 33 from the threaded pipe 35, thereby removing the column sleeve 31 and the screw 33. To facilitate the unscrewing of the screw 33 at this time, grease is applied to the surface of the screw 33 during initial processing or before on-site installation to prevent it from bonding with the concrete. After the precast foundation installation is completed, ground backfilling and modular house installation work are carried out.

[0057] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. A prefabricated foundation for multi-story intelligent modular prefabricated housing construction, characterized in that: Includes a rectangular ring beam (1) and a bottom valve plate (2) located inside the rectangular ring beam (1). A ring of insert plate gaps is left between the rectangular ring beam (1) and the bottom valve plate (2). The four corners of the bottom valve plate (2) are connected to the four corners of the rectangular ring beam (1) through adjustment mechanisms (3). The four adjustment mechanisms (3) are used to adjust the relative height of the four corners of the bottom valve plate (2) and the four corners of the rectangular ring beam (1). During construction, the precast foundation is placed in the foundation pit. The height of the bottom valve plate (2) is adjusted to the set height through the adjustment mechanism (3) and the bottom valve plate (2) is leveled. Then, grouting is performed below the bottom valve plate (2). After the first grouting solidifies, the height of the rectangular ring beam (1) is adjusted upward to the set height through the adjustment mechanism (3) and the rectangular ring beam (1) is leveled. Then, grouting is performed below the rectangular ring beam (1) and the insert plate gaps. Before grouting, a ring of templates (9) is vertically inserted into the joint of the insert plate and removed after the grouting has solidified. The adjustment mechanism (3) includes a support plate (32) detachably fixed to the rectangular ring beam (1) and a screw (33) vertically connected to the support plate (32). The adjustment mechanism (3) also includes an angle steel (36) fixed to the corner of the bottom valve plate (2), two vertically arranged limiting baffles (34) fixed to the angle steel (36), and a threaded pipe (35) located between the two limiting baffles (34). The screw (33) passes through the limiting baffles (34) and is threadedly connected to the threaded pipe (35). The rotation of the screw (33) drives the threaded pipe (35) to move up and down, thereby driving the bottom valve plate (2) and the rectangular ring beam (1) to move up and down relative to each other through the two limiting baffles (34). Angle steel (36) is embedded in the four corners of the bottom valve plate (2). Both limit baffles (34) are set horizontally. The threaded pipe (35) is located between the two limit baffles (34) and has a vertical movement of 1-3mm, ensuring that the threaded pipe (35) can tilt to a certain extent. The diameter of the through hole of the screw (33) through the limiting baffle (34) is larger than the outer diameter of the screw (33), and both the upper and lower ends of the threaded tube (35) are spherical; The threaded tube (35) has a groove on its side that is used to lock onto the end of the angle steel (36).

2. The prefabricated foundation for a multi-story intelligent prefabricated modular house building according to claim 1, characterized in that: The bottom valve plate (2) has valve plate reinforcing bars (4) extending outward from its edge. A horizontal reinforcing bar sleeve (6) is fixed inside the rectangular ring beam (1). A ring beam reinforcing bar (5) is inserted inside the reinforcing bar sleeve (6). Before the template (9) is inserted, the ring beam reinforcing bar (5) is pulled outward so that it is not inserted into the space between the valve plate reinforcing bar (4) and the rectangular ring beam (1). After the template (9) is removed and before secondary grouting, the ring beam reinforcing bar (5) is inserted inward so that the ring beam reinforcing bar (5) and the valve plate reinforcing bar (4) coincide in the length direction.

3. The prefabricated foundation for a multi-story intelligent prefabricated modular house building according to claim 2, characterized in that: The ring beam reinforcement (5) and valve plate reinforcement (4) are staggered in the horizontal direction.

4. The prefabricated foundation for a multi-story intelligent prefabricated modular house building according to claim 1, characterized in that: The support plate (32) is fixed to the vertical column sleeve (31). A vertical support column (7) is fixed to the rectangular ring beam (1). The column sleeve (31) is sleeved on the support column (7). The support column (7) has a column insertion hole (8). The column sleeve (31) has a sleeve insertion hole (39). The column sleeve (31) and the support column (7) are fixed by passing a pin through the column insertion hole (8) and the sleeve insertion hole (39).

5. A prefabricated foundation for a multi-story intelligent prefabricated modular house building according to claim 4, characterized in that: The modular house has a hole at the bottom. When the modular house is installed, the support column (7) is inserted into the hole and bolts are passed through the modular house and the support column hole (8).

6. The prefabricated foundation for a multi-story intelligent prefabricated modular house building according to claim 1, characterized in that: The bottom valve plate (2) has multiple grouting holes (10).

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