Prefabricated beam-slab foundation

Abstract

The application provides an assembled beam-slab foundation, which comprises foundation beams and combined bottom plates, the combined bottom plates comprise foundation bottom plates and four foundation secondary beams integrally formed on the four peripheral edges of the foundation bottom plates, the foundation beams are connected through connecting sleeve assemblies, the side portions of the foundation beams are provided with outwardly protruding corbels, the corbels are connected with the combined bottom plates through connecting pieces, and the four combined bottom plates arranged in a rectangular shape are connected through secondary beam connecting assemblies. The assembled beam-slab foundation provided by the application is formed by integrally forming the foundation bottom plates and the foundation secondary beams in a factory in advance and then connecting the foundation bottom plates with the corbels of the foundation beams through connecting pieces, so that the assembly efficiency is improved. The foundation beams are connected through connecting sleeve assemblies, the foundation secondary beams are connected through secondary beam connecting assemblies, and finally a whole beam-slab foundation is formed by pouring a small amount of concrete in local positions. The above structure is convenient to assemble and effectively improves the bearing capacity of the beam-slab foundation.

Description

Technical Field

[0001] This invention belongs to the field of beam and slab foundation technology, and more specifically, relates to a prefabricated beam and slab foundation. Background Technology

[0002] With the rapid development of prefabricated structures, precast beams and slabs are increasingly widely used in construction. When the upper load of a building is large and the bearing capacity of the foundation is relatively weak, simple independent foundations or strip foundations are no longer sufficient to meet the needs of foundation deformation. In this case, the foundations under walls or columns are usually connected into one piece, so that the entire load of the building is borne on a single slab. This type of raft foundation is called a raft foundation. Raft foundations include beam-slab raft foundations and flat raft foundations. Due to their large base area, raft foundations can reduce the base pressure, increase the bearing capacity of the foundation soil, effectively enhance the overall integrity of the foundation, and adjust for uneven settlement.

[0003] Large raft foundations are prone to quality problems such as heat of hydration and construction cracks during the concrete pouring process. In addition, the amount of wet work and construction waste on site is large, which delays the construction progress and reduces the life cycle of the building.

[0004] To address the aforementioned issues, beam-slab raft foundations offer certain advantages. They possess high structural stiffness and require less concrete during construction. Especially when the building's use places high demands on basement waterproofing, the "grid" space between the foundation beams can be fully utilized for necessary drainage measures. However, existing beam-slab raft foundations generally exhibit uneven stiffness variations and pronounced jumps in stress distribution. At column bases under heavy loads, abrupt changes in stress and reinforcement can easily occur, limiting their application to multi-story building structures and restricting their scope of use. Summary of the Invention

[0005] The purpose of this invention is to provide a prefabricated beam-slab foundation that can improve the bending stiffness and bearing capacity of beam-slab raft foundations, making them suitable for different building structures.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a prefabricated beam-slab foundation is provided, comprising foundation beams arranged in a crisscross pattern to form a rectangular frame and a combined base plate disposed within the rectangular frame. The combined base plate includes a foundation base plate and four foundation secondary beams integrally formed on the four edges of the foundation base plate. The foundation beams are connected by connecting sleeve assemblies. The sides of the foundation beams are provided with outwardly protruding corbels, which are connected to the combined base plate by connectors. The four combined base plates arranged in a rectangular pattern are connected by secondary beam connecting assemblies.

[0007] In one possible implementation, a first steel section protruding from the end of the foundation beam and a pre-embedded top reinforcement bar located above the first steel section are pre-embedded within the foundation beam. The first steel section has a horizontally extending outward plate, and the connecting sleeve assembly includes:

[0008] The bottom sleeve has an upward opening and is supported below the horizontal plate.

[0009] The middle sleeve is set above the horizontal plate and the bottom sleeve and supported below the pre-embedded top reinforcement. The middle sleeve and the bottom sleeve are connected vertically.

[0010] The top sleeve is set above the pre-embedded top reinforcement and the middle sleeve. The top sleeve, the middle sleeve and the bottom sleeve form a pouring cavity that is vertically connected and used for pouring concrete.

[0011] In one possible implementation, the upper end face of the bottom sleeve is provided with a first through cavity with a downward recess for a horizontal plate to pass through, and the lower end face of the top sleeve is provided with a second through cavity with an upward recess for a pre-embedded top reinforcement to pass through. The outer end of the pre-embedded top reinforcement is provided with an anchor plate, and the surface of the anchor plate contacts and engages with the inner wall of the middle sleeve and the inner wall of the top sleeve, respectively.

[0012] In one possible implementation, the first steel section is an I-beam, the horizontal plate is the lower flange of the first steel section, the horizontal plate protrudes outward from the end face of the I-beam, and several anchor rods extending in the vertical direction are provided through the horizontal plate.

[0013] In some embodiments, the lower end of the anchor bolt extends to connect with the inner bottom wall of the bottom sleeve, and the peripheral wall of the anchor bolt contacts and engages with the inner walls of the middle sleeve and the bottom sleeve respectively to align the middle sleeve and the bottom sleeve vertically.

[0014] In some embodiments, the top sleeve, middle sleeve and bottom sleeve are respectively provided with rib frames arranged in a crisscross pattern. The rib frames have a pouring cavity that is arranged vertically and horizontally to accommodate concrete. The rib frame of the bottom sleeve extends downward to connect with the inner bottom surface of the bottom sleeve.

[0015] In some embodiments, the rib frame of the middle sleeve is located near the lower part of the middle sleeve, and an outwardly extending plate is also provided on the peripheral wall of the middle sleeve. The plate surface of the outwardly extending plate is arranged in the vertical direction and is connected to the web of the first steel section through a connector.

[0016] In one possible implementation, four rectangularly arranged composite base plates form a composite structure. The foundation secondary beams include a first beam, a second beam, a third beam, and a fourth beam extending towards the center of the composite structure. The first and second beams are collinear, and the third and fourth beams are collinear and perpendicular to the first and second beams. The secondary beam connecting components include:

[0017] Two sets of pre-embedded steel bars are pre-embedded in the first beam and the second beam respectively. The two sets of pre-embedded steel bars extend towards each other and protrude outward from the ends of the first beam or the second beam respectively.

[0018] The supporting plate is embedded at the end of the third beam and is used to support the pre-embedded steel bars below. The upper edge of the supporting plate is provided with a first through hole that opens upward and allows the pre-embedded steel bars to pass through.

[0019] The clamping plate is embedded at the end of the fourth secondary beam and is used to clamp the pre-embedded steel bars. The lower edge of the clamping plate is provided with a second through hole that opens downward and allows the pre-embedded steel bars to pass through.

[0020] The steel connector extends in a direction perpendicular to the embedded reinforcing bar. The steel connector has several vertically penetrating cavities that correspond one-to-one with the embedded reinforcing bars. The lower edge of the steel connector has a third through hole that opens downwards to allow the embedded reinforcing bar to pass into the cavity. The end of the embedded reinforcing bar is threadedly connected to a first nut that abuts against the inner wall of the cavity.

[0021] In some embodiments, the supporting plate and the clamping plate are arranged adjacent to each other and in contact with each other. The clamping plate is located on the side of the supporting plate closer to the steel connector, and the pre-embedded steel bar is threaded with a second nut that abuts against the outer plate surface of the clamping plate.

[0022] In some embodiments, the supporting plate and the clamping plate are provided in two sets along the direction of the embedded steel bars, and the outer plate surface of the clamping plate near the outer end of the embedded steel bars contacts and fits with the side wall of the steel connector.

[0023] Compared with the prior art, the prefabricated beam-slab foundation provided in this application embodiment uses a factory-prefabricated integrated method to form a composite base slab, which is then connected to the corbels of the foundation beams through connectors. This facilitates improved assembly efficiency and accelerates construction progress. The foundation beams are connected by connecting sleeve components, and the foundation secondary beams are connected by secondary beam connecting components. Finally, a small amount of local pouring is required to form the overall beam-slab foundation. The above structure is easy to assemble, improves the load-bearing capacity of the beam-slab foundation, ensures the integrity of the beam-slab foundation, and can be applied to different building structures. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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.

[0025] Figure 1This is a structural schematic diagram of a prefabricated beam-slab foundation provided in an embodiment of the present invention;

[0026] Figure 2 This is an embodiment of the present invention. Figure 1 A schematic diagram of the installation structure of the foundation beam and bottom sleeve;

[0027] Figure 3 This is an embodiment of the present invention. Figure 1 Schematic diagram of the installation structure of the foundation beam, bottom sleeve and middle sleeve;

[0028] Figure 4 This is an embodiment of the present invention. Figure 1 Schematic diagram of the installation structure of the foundation beam, bottom sleeve, middle sleeve and top sleeve;

[0029] Figure 5 This is an embodiment of the present invention. Figure 4 A schematic diagram of the top sleeve structure;

[0030] Figure 6 This is an embodiment of the present invention. Figure 4 A schematic diagram of the structure of the middle sleeve;

[0031] Figure 7 This is an embodiment of the present invention. Figure 4 A schematic diagram of the installation structure of one of the foundation beams and the bottom sleeve;

[0032] Figure 8 This is an embodiment of the present invention. Figure 1 Schematic diagram of the installation structure of the secondary beams and secondary beam connection components of the foundation (steel connectors omitted);

[0033] Figure 9 This is an embodiment of the present invention. Figure 1 Schematic diagram of the installation structure of the secondary beams and secondary beam connection components of the foundation;

[0034] Figure 10 This is an embodiment of the present invention. Figure 9 Structural schematic diagram of the China Steel connector;

[0035] Figure 11 This is an embodiment of the present invention. Figure 1 A schematic diagram of the connection structure between two foundation secondary beams arranged side by side.

[0036] The following are the labeling elements in the figure:

[0037] 1. Foundation beam; 11. First steel section; 12. Embedded top reinforcement; 13. Horizontal plate; 14. Anchor plate; 15. Corbel; 2. Foundation base plate; 3. Foundation secondary beam; 31. First beam; 32. Second beam; 33. Third beam; 34. Fourth beam; 4. Connecting sleeve assembly; 41. Bottom sleeve; 411. First through cavity; 42. Middle sleeve; 421. Outer plate; 43. Top sleeve; 431. Second through cavity; 44. Anchor rod; 45. Rib frame; 451. Casting cavity; 5. Secondary beam connecting assembly; 51. Embedded reinforcement; 52. Supporting vertical plate; 521. First through hole; 53. Clamping vertical plate; 531. Second through hole; 54. Steel connector; 541. Third through hole; 542. Accommodating cavity; 55. First nut; 56. Second nut; 6. Outer stirrup; 7. Longitudinal reinforcement. Detailed Implementation

[0038] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0039] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, "a number" means two or more, unless otherwise explicitly specified.

[0040] Please refer to the following: Figures 1 to 11 The prefabricated beam-slab foundation provided by the present invention will now be described. The prefabricated beam-slab foundation includes foundation beams 1 arranged in a crisscross pattern to form a rectangular frame and a combined base plate disposed within the rectangular frame. The combined base plate includes a foundation base plate 2 and four foundation secondary beams 3 integrally formed on the four edges of the foundation base plate 2. The foundation beams 1 are connected to each other by connecting sleeve assemblies 4. The sides of the foundation beams 1 are provided with outwardly protruding corbels 15, which are connected to the combined base plate by connectors. The four combined base plates arranged in a rectangular pattern are connected by secondary beam connecting assemblies 5.

[0041] Compared with the prior art, the prefabricated beam-slab foundation provided in this embodiment uses a prefabricated method to form a composite base slab, with the foundation slab 2 and foundation secondary beams 3 prefabricated in a factory. The base slab is then connected to the corbels 15 of the foundation beams 1 through connectors, which facilitates assembly efficiency and speeds up construction. The foundation beams 1 are connected by connecting sleeve components 4, and the foundation secondary beams 3 are connected by secondary beam connecting components 5. Finally, a small amount of local pouring is required to form the overall beam-slab foundation. The above structure is easy to assemble, improves the load-bearing capacity of the beam-slab foundation, ensures the integrity of the beam-slab foundation, and can be applied to different building structures.

[0042] In some possible implementations, the aforementioned feature connecting sleeve component 4 adopts, for example... Figures 2 to 4 The structure shown. See also Figures 2 to 4 The foundation beam 1 has a first steel section 11 protruding from the end of the foundation beam 1 and a pre-embedded top reinforcement 12 located above the first steel section 11. The first steel section 11 has a horizontal plate 13 extending outward horizontally. The connecting sleeve assembly 4 includes a bottom sleeve 41, a middle sleeve 42 and a top sleeve 43. The bottom sleeve 41 has an upward opening and is supported below the horizontal plate 13. The middle sleeve 42 is located above the horizontal plate 13 and the bottom sleeve 41 and is supported below the pre-embedded top reinforcement 12. The middle sleeve 42 and the bottom sleeve 41 are vertically connected. The top sleeve 43 is located above the pre-embedded top reinforcement 12 and the middle sleeve 42. The top sleeve 43, the middle sleeve 42 and the bottom sleeve 41 form a vertically connected pouring cavity 451 for pouring concrete.

[0043] In this embodiment, the adjacent ends of the two foundation beams 1 are connected by a connecting sleeve assembly 4. The connecting sleeve assembly 4 consists of three parts: a bottom sleeve 41, a middle sleeve 42, and a top sleeve 43. Each of the three parts is a rectangular hollow component with its main axis extending vertically and having the same cross-sectional dimensions. The lower end of the bottom sleeve 41 is closed, while the middle sleeve 42 and the top sleeve 43 are both vertically continuous. The interiors of the bottom sleeve 41, middle sleeve 42, and top sleeve 43 form a pouring cavity 451 for pouring concrete, which helps to ensure the structural integrity of the entire connecting sleeve assembly 4 after connection and helps to improve the connection strength of the connecting sleeve assembly 4 to the two foundation beams 1.

[0044] Based on this, a first type of steel 11 and embedded reinforcing bars 51 are pre-embedded in the foundation beam 1. The horizontal plate 13 at the bottom of the first type of steel 11 is located between the middle sleeve 42 and the bottom sleeve 41 and extends into the pouring cavity 451, making the horizontal plate 13 and the concrete in the pouring cavity 451 an integral unit, thereby limiting and fixing the horizontal plate 13 in the foundation beams 1 on both sides by the connecting sleeve assembly 4. The embedded reinforcing bars 51 are located between the middle sleeve 42 and the top sleeve 43 and also extend into the pouring cavity 451, making the embedded reinforcing bars 51 and the concrete in the pouring cavity 451 an integral unit, thereby limiting and fixing the embedded reinforcing bars 51 in the foundation beams 1 on both sides by the connecting sleeve assembly 4, and ensuring the effective connection of the two foundation beams 1 on both sides by the connecting sleeve assembly 4.

[0045] In some possible implementations, the aforementioned feature bottom sleeve 41 adopts, for example... Figures 5 to 7 The structure shown. See also Figures 5 to 7 The upper end face of the bottom sleeve 41 is provided with a first through cavity 411 that is recessed for the horizontal plate 13 to pass through, and the lower end face of the top sleeve 43 is provided with a second through cavity 431 that is recessed for the pre-embedded top reinforcement 12 to pass through. The outer end of the pre-embedded top reinforcement 12 is provided with an anchor plate 14, and the surface of the anchor plate 14 contacts and cooperates with the inner wall of the middle sleeve 42 and the inner wall of the top sleeve 43 respectively.

[0046] To ensure the smooth extension of the horizontal plate 13 into the pouring cavity 451 and to guarantee an effective seal around the perimeter of the pouring cavity 451, a first through cavity 411 is horizontally formed on the upper surface of the bottom sleeve 41, at its perimeter. The width of the first through cavity 411 is the same as the width of the horizontal plate 13, creating space for the horizontal plate 13 to pass into the pouring cavity 451. After installation, the top surface of the horizontal plate 13 is flush with the upper surface of the bottom sleeve 41, ensuring a tight seal between the lower surface of the middle sleeve 42 and the upper surface of the bottom sleeve 41, preventing leakage during subsequent concrete pouring.

[0047] Similarly, multiple horizontally penetrating second through cavities 431 are provided on the lower end face of the top sleeve 43, that is, at the four edges. The width of the second through cavity 431 is the same as the width of the embedded steel bar 51, which is used to form a space for the embedded steel bar 51 to pass into the pouring cavity 451. After installation, the lower end face of the top sleeve 43 can contact the upper end face of the middle sleeve 42 to prevent concrete leakage.

[0048] Specifically, the four directions around the outer periphery of the bottom sleeve 41 correspond to the four foundation beams 1. A first through cavity 411 is provided at each of the four edges of the bottom sleeve 41, allowing the horizontal plate 13 on the corresponding foundation beam 1 to pass through. Similarly, the four directions around the outer periphery of the bottom sleeve 41 correspond to the four foundation beams 1, each foundation beam 1 having four pre-embedded reinforcing bars 51 arranged at equal heights. A second through cavity 431 is provided at each of the four edges of the top sleeve 43, allowing the four pre-embedded reinforcing bars 51 on the corresponding foundation beam 1 to pass through, ensuring precise correspondence.

[0049] Furthermore, the end of the pre-embedded top reinforcement 12 is provided with an anchor plate 14. The anchor plate 14 is located in the casting cavity 451 and abuts against the inner wall of the top sleeve 43 and the inner wall of the middle sleeve 42, forming a constraint on the pre-embedded top reinforcement 12, ensuring the stability of the relative position between the pre-embedded top reinforcement 12 and the connecting sleeve assembly 4, and improving the reliability of the connection.

[0050] In some possible implementations, the first type of steel 11 with the above-mentioned features adopts, for example... Figure 7 The structure shown. See also Figure 7 The first steel section 11 is an I-beam, and the horizontal plate 13 is the lower flange of the first steel section 11. The horizontal plate 13 protrudes outward from the end face of the I-beam, and several anchor rods 44 extending in the vertical direction are installed through the horizontal plate 13.

[0051] In this embodiment, in order to improve the reliability of the connection and also to reduce the material procurement cost, the first steel 11 adopts the structure of an I-beam, using the lower flange of the I-beam as a horizontal plate 13, the web of the I-beam protruding outward from the upper flange of the I-beam, and the lower flange of the I-beam protruding outward from the web of the I-beam, forming a horizontal plate 13 extending into the casting cavity 451.

[0052] Based on this, multiple through holes are set on the horizontal plate 13. Anchor rods 44 with the same outer diameter as the inner diameter of the holes are inserted into the holes of the horizontal plate 13 to constrain the position of the horizontal plate 13. Finally, concrete is poured into the casting cavity 451 to complete the connection of the connecting sleeve assembly 4 to the foundation beam 1.

[0053] Specifically, the lower end of the anchor rod 44 extends to connect with the inner bottom wall of the bottom sleeve 41. The peripheral wall of the anchor rod 44 contacts and engages with the inner walls of the middle sleeve 42 and the bottom sleeve 41 to align the middle sleeve 42 and the bottom sleeve 41 vertically, which facilitates effective constraint on the position of the horizontal plate 13 and ensures the stability of the relative position of the horizontal plate 13 with the middle sleeve 42 and the bottom sleeve 41. Then, the reliability of the connection is further improved by pouring concrete.

[0054] In some embodiments, the aforementioned top sleeve 43, middle sleeve 42, and bottom sleeve 41 can be adopted as follows: Figures 5 to 7The structure shown. See also Figures 5 to 7 The top sleeve 43, the middle sleeve 42 and the bottom sleeve 41 are respectively provided with rib frames 45 arranged in a crisscross pattern. The rib frames 45 have a pouring cavity 451 that is arranged vertically and horizontally to accommodate concrete. The rib frames 45 of the bottom sleeve 41 extend downward to connect with the inner bottom surface of the bottom sleeve 41.

[0055] In this embodiment, the bottom sleeve 41, the middle sleeve 42 and the top sleeve 43 are respectively provided with rib frame 45. The rib frame 45 is formed by several crisscrossing steel ribs. The rib frame 45 has multiple matrix-arranged and vertically connected through cavities inside. After the subsequent concrete is poured, the rib frame 45 can play a reliable supporting role and ensure the structural strength inside the connecting sleeve assembly 4.

[0056] The rib frame 45 inside the top sleeve 43 provides good force transmission, with its upper edge flush with the upper edge of the top sleeve 43. The lower edge of the rib frame 45 inside the top sleeve 43 has a certain distance from the lower end face of the top sleeve 43, allowing it to abut and press against the pre-embedded reinforcing bar 51, effectively constraining its installation position. The lower edge of the rib frame 45 of the middle sleeve 42 is flush with the lower end face of the middle sleeve 42, and the rib frame 45 can be used to secure the horizontal plate 13 within the first through cavity 411.

[0057] In some embodiments, the sleeve 42 in the above features can be adopted as follows: Figure 6 The structure shown. See also Figure 6 The rib frame 45 of the middle sleeve 42 is located near the lower part of the middle sleeve 42. The peripheral wall of the middle sleeve 42 is also provided with an outwardly extending plate 421. The plate surface of the outwardly extending plate 421 is arranged in the vertical direction and is connected to the web of the first steel 11 through a connector.

[0058] In this embodiment, an extension plate 421 perpendicular to the outer wall of the middle sleeve 42 is provided on its four outer walls. A first steel section 11 is pre-embedded in the foundation beam 1. The web of the first steel section 11 protrudes outward from the upper flange, and the lower flange of the first steel section 11 protrudes outward from the web to form a horizontal plate 13 extending into the casting cavity 451. The length of the extension plate 421 outside the middle sleeve 42 in the vertical direction is equal to the height of the web of the first steel section 11, so that the extension plate 421 and the web can be horizontally aligned. The extension plate 421 and the web are respectively provided with connecting holes evenly arranged in the vertical direction for the connecting parts to pass through, thereby reliably connecting the extension plate 421 and the web, effectively enhancing the connection strength between the connecting sleeve assembly 4 and the foundation beam 1.

[0059] Among some possible implementations, the aforementioned characteristic foundation secondary beam 3 adopts, for example... Figure 8 and Figure 9 The structure shown. See also Figure 8and Figure 9 Four rectangular base plates form a composite structure. The foundation secondary beams 3 include a first beam 31, a second beam 32, a third beam 33, and a fourth beam 34 extending towards the center of the composite structure. The first beam 31 and the second beam 32 are collinear, and the third beam 33 and the fourth beam 34 are collinear and perpendicular to the first beam 31 and the second beam 32. The secondary beam connecting assembly 5 includes two sets of embedded steel bars 51, a supporting upright plate 52, a clamping upright plate 53, and steel connectors 54. The two sets of embedded steel bars 51 are embedded in the first beam 31 and the second beam 32, respectively, and extend towards each other, protruding outward from the ends of the first beam 31 or the second beam 32. The supporting upright plate 52 is embedded at the end of the third beam 33 and is used to support... Below the embedded reinforcing bar 51, the upper edge of the supporting plate 52 is provided with a first through hole 521 that opens upward and allows the embedded reinforcing bar 51 to pass through; the clamping plate 53 is embedded at the end of the fourth secondary beam 34 and is used to clamp the embedded reinforcing bar 51 above it. The lower edge of the clamping plate 53 is provided with a second through hole 531 that opens downward and allows the embedded reinforcing bar 51 to pass through; the steel connector 54 extends in a direction perpendicular to the embedded reinforcing bar 51. The steel connector 54 has several vertically penetrating cavities 542 that correspond one-to-one with the embedded reinforcing bars 51. The lower edge of the steel connector 54 is provided with a third through hole 541 that opens downward and allows the embedded reinforcing bar 51 to pass into the cavities 542. The end of the embedded reinforcing bar 51 is threadedly connected to a first nut 55 that abuts against the inner wall of the cavities 542.

[0060] In this embodiment, four rectangularly arranged composite base plates form a composite body, which is then joined together by a secondary beam connecting component 5 located at the center of the composite body. This assembly is primarily achieved by connecting the foundation secondary beams 3 of the different composite base plates. Each composite base plate has four foundation secondary beams 3 arranged around its outer perimeter. For ease of description, these foundation secondary beams 3 at different positions around the secondary beam connecting component 5 are defined as first beam 31, second beam 32, third beam 33, and fourth beam 34, respectively. Two of each of these beams are arranged side-by-side on the outer perimeter of the secondary beam connecting component 5.

[0061] During the prefabrication process, pre-embedded steel bars 51 extending in opposite directions are provided at the adjacent ends of the first beam 31 and the second beam 32. Supporting plates 52 and clamping plates 53 extending in opposite directions are respectively provided at the adjacent ends of the third beam 33 and the fourth beam 34. The extension directions of the supporting plates 52 and the clamping plates 53 are parallel and perpendicular to the extension direction of the pre-embedded steel bars 51. The supporting plates 52 and the clamping plates 53 are located below and above the pre-embedded steel bars 51, respectively, forming a positional relationship with the pre-embedded steel bars 51 to achieve a good limiting effect.

[0062] Specifically, each of the two parallel third beams 33 is provided with a support plate 52. The upper edge of the support plate 52 is provided with a first through hole 521 that opens upward and allows the pre-embedded steel bar 51 to pass through, so that the support plate 52 provides support below the pre-embedded steel bar 51. The lower edge of the clamping plate 53 is provided with a second through hole 531 that opens downward and allows the pre-embedded steel bar 51 to pass through, so that the clamping plate 53 provides downward pressure above the pre-embedded steel bar 51. Through the cooperation of the support plate 52 and the clamping plate 53, the pre-embedded steel bar 51 is effectively limited.

[0063] Based on this, the steel connector 54 is located between the first beam 31 and the second beam 32, and extends in a direction perpendicular to the embedded steel bar 51, that is, in the direction of the third beam 33 and the fourth beam 34. The steel connector 54 has several vertically penetrating cavities 542 that correspond one-to-one with the embedded steel bars 51. The cavities 542 are used for the extension ends of the embedded steel bars 51 to extend into, and the first nut 55 abuts against the inner wall of the cavities 542 to effectively lock the relative position of the extension ends of the embedded steel bars 51 and the steel connector 54, ensuring a reliable connection between the embedded steel bars 51 and the steel connector 54 during subsequent concrete pouring.

[0064] In some embodiments, the aforementioned support plate 52 can be adopted as follows: Figure 8 and Figure 9 The structure shown. See also Figure 8 and Figure 9 The supporting plate 52 and the clamping plate 53 are arranged adjacent to each other and in contact. The clamping plate 53 is located on the side of the supporting plate 52 near the steel connector 54. The embedded steel bar 51 is threaded with a second nut 56 that abuts against the outer plate surface of the clamping plate 53.

[0065] In this embodiment, the adjacent side plates of the supporting plate 52 and the clamping plate 53 are in contact with each other, which makes it easier to concentrate the supporting and clamping effects on the pre-embedded steel bar 51 in a relatively close axial position, and avoids the force in the vertical direction being intersected due to the large distance between the two, which would affect the limiting effect on the pre-embedded steel bar 51.

[0066] In some embodiments, the aforementioned supporting plate 52 and clamping plate 53 can be adopted as follows: Figure 8 and Figure 9 The structure shown. See also Figure 8 and Figure 9 The supporting plate 52 and the clamping plate 53 are provided in two sets along the direction of the embedded steel bar 51. The outer plate surface of the clamping plate 53 near the outer end of the embedded steel bar 51 is in contact with the side wall of the steel connector 54.

[0067] In this embodiment, the embedded reinforcing bar 51 of the first beam 31 is used as an example for explanation. In addition to supporting the middle part of the protruding portion of the embedded reinforcing bar 51, a set of supporting upright plates 52 and clamping upright plates 53 are also provided near the steel connector 54 of the embedded reinforcing bar 51. Among them, the clamping upright plate 53 is located near the steel connector 54. Under the thread tightening action of the first nut 55, the outer wall of the clamping upright plate 53 can abut against the outer wall of the steel connector 54, achieving a good limiting effect.

[0068] Based on the above structure, extended stirrups 6 are also provided between the two parallel first beams 31, the two parallel second beams 32, the two parallel third beams 33, and the two parallel fourth beams 34.

[0069] Taking the outward-extending stirrups 6 on two parallel third beams 33 as an example, the outward-extending stirrups 6 are U-shaped steel bars with their openings facing outwards. The openings of the U-shaped steel bars extend along the extension direction of the third beam 33, and the outward-extending stirrups 6 on adjacent sides of the two third beams 33 can form a complete rectangular stirrup structure. The outward-extending stirrups 6 are spaced apart along the extension direction of the third beam 33, and the number of outward-extending stirrups 6 is set according to the foundation bearing capacity requirements. When connecting, the two outward-extending stirrups 6 on the two third beams 33 can be staggered and fitted together, forming a space for the longitudinal steel bars 7 to be inserted. Two longitudinal steel bars 7 are provided in the above space, one near the top and one near the bottom of the outward-extending stirrups 6. Then, the upper and lower longitudinal steel bars 7 are tied together. The length of the longitudinal steel bars 7 is the same as the length of the third beam 33. After tying, concrete is poured at this position to achieve a reliable connection between the two third beams 33. The two primary beams 31, two secondary beams 32, and two quaternary beams 34, which are adjacent and arranged in parallel, are also reliably connected by the above-mentioned structure to achieve the effect of connecting two adjacent composite base plates. Combined with the connection sleeve component 4 to connect the four foundation beams 1, and the secondary beam connection component 5 to connect the foundation secondary beams 3, the entire prefabricated beam-slab foundation is formed. The assembly process is simple and convenient, which improves the load-bearing capacity of the beam-slab foundation and can be applied to different building structures.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A prefabricated beam-slab foundation, characterized in that, The system includes foundation beams arranged in a crisscross pattern to form a rectangular frame and a composite base plate disposed within the rectangular frame. The composite base plate includes a foundation base plate and four foundation secondary beams integrally formed on the four edges of the foundation base plate. The foundation beams are connected to each other by connecting sleeve assemblies. The sides of the foundation beams are provided with outwardly protruding brackets, which are connected to the composite base plate by connectors. The four composite base plates arranged in a rectangular pattern are connected by secondary beam connecting assemblies. The foundation beam includes a first steel section protruding from its end and a pre-embedded top reinforcement bar located above the first steel section. The first steel section has a horizontally extending plate. The first steel section is an I-beam, and the horizontal plate is the lower flange of the first steel section, protruding outward from the end face of the I-beam. The connecting sleeve assembly includes a bottom sleeve, a middle sleeve, and a top sleeve. The bottom sleeve has an upward opening and is supported below the horizontal plate. The middle sleeve is located above the horizontal plate and the bottom sleeve, and is supported below the pre-embedded top reinforcement bar, with the middle sleeve and the bottom sleeve communicating vertically. The top sleeve is located above the pre-embedded top reinforcement bar and the middle sleeve, and the top sleeve, the middle sleeve, and the bottom sleeve form a vertically communicating pouring cavity for pouring concrete. The horizontal plate and the pre-embedded top reinforcement bar both extend into the pouring cavity. The top sleeve, the middle sleeve, and the bottom sleeve are each provided with a rib frame arranged in a crisscross pattern. The rib frame has a vertically through-hole for accommodating concrete pouring cavities. The rib frame of the bottom sleeve extends downward to connect with the inner bottom surface of the bottom sleeve. The rib frame of the middle sleeve is located near the lower part of the middle sleeve. The peripheral wall of the middle sleeve is also provided with an outwardly extending plate. The surface of the outward plate is arranged in the vertical direction and is connected to the web of the first steel section through a connector.

2. The prefabricated beam-slab foundation as described in claim 1, characterized in that, The upper end face of the bottom sleeve is provided with a first through cavity with a downward recess for the horizontal plate to pass through, and the lower end face of the top sleeve is provided with a second through cavity with an upward recess for the pre-embedded top reinforcement to pass through. The outer end of the pre-embedded top reinforcement is provided with an anchor plate, and the surface of the anchor plate is in contact with the inner wall of the middle sleeve and the inner wall of the top sleeve, respectively.

3. The prefabricated beam-slab foundation as described in claim 1, characterized in that, A plurality of anchor rods extending vertically are provided through the horizontal plate; the lower end of the anchor rod extends to connect with the inner bottom wall of the bottom sleeve, and the peripheral wall of the anchor rod contacts and engages with the inner walls of the middle sleeve and the bottom sleeve respectively to align the middle sleeve and the bottom sleeve vertically.

4. The prefabricated beam-slab foundation as described in any one of claims 1-3, characterized in that, The four rectangularly arranged composite base plates form a composite body. The foundation secondary beams include a first beam, a second beam, a third beam, and a fourth beam extending towards the center of the composite body. The first beam and the second beam are collinear, and the third beam and the fourth beam are collinear and perpendicular to the first beam and the second beam. The secondary beam connecting assembly includes: Two sets of pre-embedded reinforcing bars are pre-embedded in the first beam and the second beam, respectively. The two sets of pre-embedded reinforcing bars extend towards each other and protrude outward from the ends of the first beam or the second beam, respectively. The supporting plate is embedded at the end of the third beam and is used to support the pre-embedded steel bars below. The upper edge of the supporting plate is provided with a first through hole that opens upward and allows the pre-embedded steel bars to pass through. A clamping plate is embedded in the end of the fourth secondary beam and used to clamp the pre-embedded reinforcing bar. The lower edge of the clamping plate is provided with a second through hole that opens downward and allows the pre-embedded reinforcing bar to pass through. A steel connector extends in a direction perpendicular to the embedded reinforcing bar. The steel connector has several vertically penetrating cavities that correspond one-to-one with the embedded reinforcing bar. The lower edge of the steel connector has a third through hole with an opening facing downwards to allow the embedded reinforcing bar to pass into the cavities. The end of the embedded reinforcing bar is threadedly connected to a first nut that abuts against the inner wall of the cavities.

5. The prefabricated beam-slab foundation as described in claim 4, characterized in that, The supporting upright plate and the clamping upright plate are arranged adjacent to each other and in contact with each other. The clamping upright plate is located on the side of the supporting upright plate closer to the steel connector. The pre-embedded steel bar is threaded with a second nut that abuts against the outer surface of the clamping upright plate.

6. The prefabricated beam-slab foundation as described in claim 4, characterized in that, The supporting plate and the clamping plate are provided in two sets along the direction of the embedded steel bar. The outer plate surface of the clamping plate near the outer end of the embedded steel bar contacts and fits with the side wall of the steel connector.

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