Prefabricated concrete frame integrated modular house structure and construction method thereof

Abstract

This invention provides a prefabricated concrete frame integrated modular housing structure and its construction method, relating to the field of building construction technology. It includes at least one floor housing structure; the at least one floor housing structure comprises multiple modular units that are spliced ​​together and prefabricated as a single unit. Each modular unit includes at least one of the following: a prefabricated edge beam, a floor slab assembly, and a structural column. In at least one pair of modular units: the adjacent corners of the two modular units together form a splicing area, and the splicing area has only one structural column. The structural column is prefabricated within any one modular unit and connects to the beam end of a prefabricated edge beam or a floor slab assembly within the other modular unit. This modular housing structure significantly reduces on-site wet work and manual binding work, while fundamentally solving the problem that narrow gaps between columns make it difficult to achieve connections, whether hinged or rigid, thus improving the seismic toughness and structural safety of modular buildings.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a prefabricated concrete frame integrated modular housing structure and its construction method. Background Technology

[0002] Modular housing is an advanced form of building industrialization, representing an integrated and systematic upgrade of building industrialization. Through full-process industrialization transformation, it achieves a comprehensive leap in building production efficiency, quality, and environmental performance. It is the core direction for the future industrialization, greening, and intelligent development of the construction industry, and modular housing construction will become the main method of future housing construction.

[0003] While modular housing has demonstrated numerous advantages, its structural problems remain prominent, primarily concerning the connections between structural modules, including both vertical and horizontal connections. In existing technologies, four frame columns are positioned at the four corners of a concrete frame module. On-site connections between modules are achieved by linking these corner columns. However, due to the need for tight fit during module assembly, the narrow gaps between columns make both hinged and rigid connections difficult to implement. If the column connection is designed as a rigid connection, the excessive stiffness of the short beam connecting the columns results in a large absorption of seismic forces during earthquakes, creating a weak point in the seismic resistance and compromising structural safety. If designed as a hinged connection, it affects the structure's lateral stiffness. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated concrete frame integrated modular housing structure, which significantly reduces on-site wet work and manual binding work, and fundamentally solves the problem that narrow gaps between columns make it difficult to achieve connections, whether hinged or rigid, thus improving the seismic toughness and structural safety of modular buildings. Furthermore, this invention provides a construction method for a prefabricated concrete frame integrated modular housing structure using the above-mentioned prefabricated concrete frame integrated modular housing structure.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, the present invention provides a prefabricated concrete frame integrated modular housing structure, comprising at least one floor housing structure;

[0007] At least one floor of the building structure includes a structural column assembly forming a supporting frame, the structural column assembly including at least one structural column;

[0008] The building structure of at least one floor comprises multiple modular units that are spliced ​​together and prefabricated as a single unit. For each modular unit, at least one of the following is included: a side beam, a floor slab assembly, and a structural column prefabricated therein.

[0009] In at least one pair of the module units: the adjacent corners of the two module units together form a first splicing area, the first splicing area is provided with only one structural column, the structural column is prefabricated in any one of the module units and is connected to the beam end of the edge beam or the floor slab assembly prefabricated in the other module unit.

[0010] In an alternative implementation, in at least one pair of said modular units: the floor slab assembly of one is connected to the beam side of the edge beam of the other or the floor slab assembly.

[0011] In an optional embodiment, in the house structure provided with the structural column assembly, the structural column is prefabricated within the modular unit located at the edge.

[0012] In an optional embodiment, the top of the structural column has an upward protrusion that protrudes above the top surface elevation of the module unit, and a first clearance space is provided between the bottom of the structural column and the bottom surface elevation of the module unit for the upward protrusion of the lower structural column to extend into.

[0013] Alternatively, the bottom end of the structural column has a downward protrusion that protrudes below the bottom elevation of the module unit, and a third clearance space is provided between the top end of the structural column and the top elevation of the module unit for the downward protrusion of the upper structural column to extend into.

[0014] In an optional embodiment, a downward-extending steel section is pre-embedded at the bottom of the upper structural column, and the downward-extending steel section is connected to the longitudinal reinforcement inside the structural column.

[0015] An upward-extending steel section is pre-embedded at the top of the structural column located in the lower layer. One end of the upward-extending steel section is connected to the longitudinal reinforcement in the structural column, and the other end is connected to the downward-extending steel section.

[0016] In an optional embodiment, the lower and upper steel sections form a cavity with a side opening, the edge of which is provided with an inner lining eave. The lower and upper steel sections are also connected by a sealing plate, which is located at the side opening and abuts against the inner lining eave.

[0017] In an optional embodiment, the top of the structural column is level with the top surface of the module unit, and the structural column is provided with an upward vertical rib protruding from its own top surface. A second clearance space is provided between the bottom of the structural column and the bottom surface of the module unit for the upward vertical rib of the lower structural column to extend into. Concrete is poured in the second clearance space.

[0018] Alternatively, the bottom end of the structural column is flush with the bottom surface of the module unit, and the structural column is provided with a downwardly extending vertical rib protruding from its own bottom surface. A fourth clearance space is provided between the top end of the structural column and the top surface of the module unit for the downwardly extending vertical rib of the upper structural column to extend into. Concrete is poured in the fourth clearance space.

[0019] In an optional implementation, in at least one pair of the module units:

[0020] One of the side beams or floor slab components has a first connector protruding from the side beam or floor slab component, and the other of the structural columns has a second connector protruding from the structural column and connected to the first connector.

[0021] Alternatively, in one of the side beams or floor slab components, the first precast reinforcing bar is exposed, and in the other, the second precast reinforcing bar is exposed and connected to the first reinforcing bar.

[0022] In an optional implementation, in at least one pair of the module units:

[0023] The edge of the side beam is reserved with space for the connection of the floor slab assembly. A third steel bar is prefabricated in the floor slab assembly. The third steel bar is exposed from the side of the floor slab assembly and connected to the side beam through concrete.

[0024] Alternatively, a fourth reinforcing bar is prefabricated in each of two adjacent floor slab components, and the fourth reinforcing bar is exposed from the side of the corresponding floor slab component; a bottom mold is provided on the side of one of the module units, and the bottom mold is located below the exposed part of the fourth reinforcing bar, and the fourth reinforcing bars in the two floor slab components are connected by concrete poured on the bottom mold.

[0025] Secondly, the present invention provides a construction method for a prefabricated concrete frame integrated modular housing structure, employing the prefabricated concrete frame integrated modular housing structure as described in any of the foregoing embodiments, comprising:

[0026] The modular units are hoisted into place and spliced ​​into the lower building structure. The modular units with the floor slab assembly and the exposed steel bars in the floor slab assembly are hoisted later than the modular units with the side beams.

[0027] At least one layer of composite concrete should be poured;

[0028] The upper module unit is hoisted and connected to the lower module unit via a grouting sleeve or connecting assembly.

[0029] The prefabricated concrete frame integrated modular housing structure and its construction method provided by this invention can produce the following beneficial effects:

[0030] The prefabricated concrete frame integrated modular housing structure provided by this invention integrates structural components such as edge beams, structural columns, and floor slabs into the modular unit, realizing the integrated prefabrication of structural components such as beams, slabs, and columns with the module. This reduces on-site work such as rebar tying and concrete pouring. On-site construction of the prefabricated concrete frame integrated modular housing structure can be completed simply by connecting the structural components of different modular units. Its structural system stress is equivalent to that of a cast-in-place reinforced concrete structure, and the joint connections are convenient, with minimal on-site wet work.

[0031] Furthermore, in the prefabricated concrete frame integrated modular housing structure provided by this invention, the structural columns are connected to the end of the edge beams or floor slab components, unlike the direct connection mode between structural columns. This fundamentally solves the problem that the narrow gaps between columns make it difficult to achieve connections, whether hinged or rigid. Moreover, the decentralized, multi-layered horizontal connections (beam-column, beam-beam, slab-beam, slab-slab) enhance the lateral stiffness and energy dissipation capacity of the structure, avoiding seismic force concentration caused by excessive local stiffness, thereby substantially improving the seismic toughness and structural safety of modular buildings. Attached Figure Description

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

[0033] Figure 1 A three-dimensional structural schematic diagram of the first type of module unit provided in an embodiment of the present invention;

[0034] Figure 2 An exploded view of the first type of module unit provided in an embodiment of the present invention;

[0035] Figure 3 This is a plan view of the first type of house structure provided in an embodiment of the present invention;

[0036] Figure 4 This is a plan view of a second type of house structure provided in an embodiment of the present invention;

[0037] Figure 5 This is a plan view of a third type of house structure provided in an embodiment of the present invention;

[0038] Figure 6 This is a plan view of the fourth type of house structure provided in an embodiment of the present invention;

[0039] Figure 7 This is a plan view of the fifth type of house structure provided in an embodiment of the present invention;

[0040] Figure 8 This is a plan view of the sixth type of house structure provided in an embodiment of the present invention;

[0041] Figure 9 This is a plan view of the seventh type of house structure provided in an embodiment of the present invention;

[0042] Figure 10 This is a plan view of the eighth type of house structure provided in an embodiment of the present invention;

[0043] Figure 11 Explosions during the connection of the ninth type of house structure provided in the embodiments of the present invention using Scheme 1 Figure 1 ;

[0044] Figure 12 for Figure 11 A magnified view of part A;

[0045] Figure 13 Explosions during the connection of the ninth type of house structure provided in the embodiments of the present invention using Scheme 1 Figure 2 ;

[0046] Figure 14 An exploded view of the ninth type of house structure provided in this embodiment of the invention when connected using Scheme 2;

[0047] Figure 15 A three-dimensional structural diagram of the floor slab assembly and structural column connected according to Scheme 1, provided in an embodiment of the present invention;

[0048] Figure 16 for Figure 15 A magnified view of part B;

[0049] Figure 17 This is a three-dimensional structural diagram of the floor slab assembly and structural column connected using Scheme 2, as provided in an embodiment of the present invention.

[0050] Figure 18 for Figure 17 A magnified view of a portion at point C;

[0051] Figure 19 A three-dimensional structural diagram of the connection between the floor slab assembly and the edge beam provided in an embodiment of the present invention;

[0052] Figure 20 for Figure 19 A magnified view of a portion at point D;

[0053] Figure 21 This is a three-dimensional structural diagram of the connection between adjacent floor slab components provided in an embodiment of the present invention;

[0054] Figure 22 for Figure 21 A magnified view of a portion at point E;

[0055] Figure 23 A three-dimensional structural diagram of the ninth type of building structure combined with composite concrete, provided for an embodiment of the present invention;

[0056] Figure 24 A three-dimensional structural diagram of the first type of prefabricated concrete frame integrated modular house structure provided in this embodiment of the invention;

[0057] Figure 25 This is a three-dimensional structural diagram of a second type of prefabricated concrete frame integrated modular house structure provided in an embodiment of the present invention;

[0058] Figure 26 This is an exploded view of the connection between upper and lower structural columns provided in an embodiment of the present invention;

[0059] Figure 27 A three-dimensional structural diagram of a third type of prefabricated concrete frame integrated modular house structure provided in an embodiment of the present invention.

[0060] Icons: 1-Module unit; 11-Lightweight infill wall; 12-Edge beam; 13-Floor slab assembly; 131-Top slab; 132-Bottom slab; 14-Structural column; 141-Upper protrusion; 142-Lower extension steel; 143-Upper extension steel; 144-Upper extension vertical reinforcement; 145-First clearance space; 146-Inner lining eaves; 147-Sealing plate; 148-Second clearance space; 15-First connector; 16-Second connector; 17-First reinforcement; 18-Second reinforcement; 19-Third reinforcement; 110-Fourth reinforcement; 1011-Bottom formwork; 1012-Side plate; 2-Layer concrete; 3-First splicing area; 4-Second splicing area. Detailed Implementation

[0061] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0063] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0065] The first aspect of the present invention provides a prefabricated concrete frame integrated modular housing structure, including at least one floor housing structure, which may include a single floor housing structure, or a two-story, three-story, four-story or even more-story housing structure, and the specific number of floors can be adjusted according to actual needs.

[0066] At least one floor of the building structure includes structural column components that form a supporting frame. The purpose of the structural column components is to ensure that the building structure of this floor is effectively supported. Depending on the floor area and other conditions of the building structure, the structural column components may include one structural column 14, or two, three, four or even more structural columns 14. The specific number can be adjusted according to actual needs.

[0067] The at least one-story building structure comprises multiple modular units 1 that are interconnected and prefabricated as a single unit. For each modular unit 1, such as... Figure 1 and Figure 2 As shown, it includes at least one of the prefabricated edge beams 12, floor slab components 13, and structural columns 14; in at least one pair of module units 1: the adjacent corners of the two module units 1 together form a first splicing area 3, the first splicing area 3 is provided with only one structural column 14, the structural column 14 is prefabricated in any one module unit 1 and connected to the beam end of the prefabricated edge beam 12 or floor slab component 13 in the other module unit 1.

[0068] It should be understood that structural columns 14 are not required for each module unit 1. For example, if structural columns 14 are provided on both sides of a module unit 1, and the load-bearing requirements are met, then structural columns 14 of the module unit 1 can be omitted. Or, in a building structure, if structural columns 14 are provided on the edge of the module unit 1, then structural columns 14 can be omitted on the middle module unit 1.

[0069] Of course, the above is just an example. In actual construction, for a building structure with a certain floor or several floors where the load-bearing capacity requirement is not high, structural columns 14 may not be required at all.

[0070] Furthermore, it is understandable that not all module units 1 need to have edge beams 12 and floor slab components 13. For example, for buildings requiring a large ceiling height, floor slab components 13 for several module units 1 in a multi-story building structure can be omitted to achieve vertical continuity. Alternatively, provided that the load-bearing capacity is met, some module units 1 may not have edge beams 12, and the connection between the edges of module units 1 can be achieved solely through floor slab components 13.

[0071] In one embodiment, each module unit 1 is provided with at least one of a side beam 12 and a floor slab assembly 13.

[0072] The prefabricated concrete frame integrated modular housing structure provided by the first aspect of the present invention integrates structural components such as edge beams 12, structural columns 14, and floor slab components 13 into the module unit 1, realizing the integrated design and prefabrication of structural components such as beams, slabs, and columns of the module unit 1 with the module. This reduces on-site work such as rebar tying and concrete pouring. On-site construction of the prefabricated concrete frame integrated modular housing structure can be completed simply by connecting the structural components of different module units 1. Its structural system stress is equivalent to that of a cast-in-place reinforced concrete structure, and the node connection is convenient with minimal on-site wet work.

[0073] Furthermore, in the prefabricated concrete frame integrated modular house structure provided by the first aspect of the present invention, the structural column 14 is connected to the end of the edge beam 12 or the floor slab assembly 13, which is different from the direct connection mode of structural column 14. This fundamentally solves the problem that the narrow gap between columns makes it difficult to achieve the connection, whether it is a hinged or rigid connection. Moreover, the decentralized and multi-layered horizontal connection (beam-column, beam-beam, slab-beam, slab-slab) improves the lateral stiffness and energy dissipation capacity of the structure, avoids the phenomenon of seismic force concentration caused by excessive local stiffness, and thus substantially improves the seismic toughness and structural safety of modular buildings.

[0074] Specifically, such as Figures 3 to 5 As shown, in a house structure with structural column components, two module units 1 can be spliced ​​together, or three or four module units 1 can be spliced ​​together. The corners of two module units 1 are spliced ​​together to form a first splicing area 3, and the corners of two or more module units 1 are spliced ​​together to form a second splicing area 4. Whether it is the first splicing area 3 or the second splicing area 4, only one structural column 14 is provided. The structural column 14 can be prefabricated in any module unit 1.

[0075] It is understood that the size of the second splicing region 4 is larger than that of the first splicing region 3, and each second splicing region 4 can be composed of multiple first splicing regions 3. Within the second splicing region 4, the areas covered by each first splicing region 3 may or may not overlap.

[0076] The aforementioned "single-column multi-connection" corner construction method breaks through the inertia of the traditional modular unit 1 design concept of "a column must be set at every corner," fundamentally eliminating construction bottlenecks such as dense reinforcement, limited grouting space, and difficulty in vibrating concrete in the joint area caused by multiple adjacent columns. Since the high-precision prefabrication and reinforcement integration of the structural column 14 only need to be completed within a single modular unit 1, the factory's standardized production rate is significantly improved; on-site, only one precise hoisting and multi-directional synchronous connection are required, reducing the amount of high-altitude work and the need for temporary supports, thus shortening the construction period. More importantly, this construction changes the structural stiffness distribution pattern: it avoids stress concentration caused by abrupt stiffness changes at the corners of traditional multi-column structures, making the inter-story displacement under horizontal seismic action more uniform; at the same time, by applying constraints to the single column from multiple orthogonal directions through the edge beam 12 and the floor slab assembly 13, the overall rotational stiffness and energy dissipation capacity of the joint area are significantly enhanced, effectively delaying column base yielding under vibration.

[0077] In alternative implementations, such as Figures 6 to 8 As shown, in a house structure with structural column assemblies, structural columns 14 are prefabricated within module units 1 located at the edge.

[0078] The aforementioned edges may refer to the module units 1 located at both ends in the length direction of the house structure arrangement, and / or the module units 1 located at both ends in the width direction of the house structure arrangement.

[0079] The above-described implementation method strengthens the overall overturning resistance and edge constraint stiffness of the structure by prefabricating all structural columns 14 within the edge module unit 1, and can effectively suppress the floor torsional effect under seismic action.

[0080] In alternative implementations, such as Figures 6 to 9 As shown, in at least one pair of horizontally spliced ​​modular units 1: one modular unit 1 is provided with a side beam 12, and the other modular unit 1 is provided with a floor slab assembly 13 connected to the side beam 12.

[0081] The aforementioned connection method breaks through the limitations of traditional "isomorphic symmetrical splicing" between modules, achieving functional complementarity and mechanical synergy between heterogeneous components. Specifically, the edge beam 12 bears the bending moment and shear force transmission under horizontal loads. Since the floor slab component 13 of another module unit 1 is connected to the edge beam 12 of the adjacent module unit 1, the edge beam 12 can jointly resist the deformation of both module units 1. Simultaneously, by eliminating the edge beam 12 of one of the module units 1, the manufacturing process of the aforementioned module unit 1 is simplified, reducing construction costs.

[0082] In one implementation, such as Figure 9 As shown, when the strength requirements are met, two adjacent module units 1 can be connected through their floor slab components 13.

[0083] In one implementation, such as Figure 10 As shown, at least one floor building structure includes N rows and M columns of module units 1, N≥2, M≥2, and at least two rows and / or at least two columns of adjacent module units 1: one module unit 1 is provided with a side beam 12, and the other module unit 1 is provided with a floor slab assembly 13 connected to the side beam 12.

[0084] The above implementation can form a main channel for resisting lateral forces in the transverse direction (between rows) (dominated by the side beam 12), and at the same time or only in the longitudinal direction (between columns) a main channel for resisting lateral forces (dominated by the side beam 12), which significantly improves the deformation coordination ability and damage dispersion of the structure under multi-directional ground motion.

[0085] In an optional implementation, when two horizontally adjacent module units 1 are spliced ​​together, and the beam end of the edge beam 12 of one of them needs to form a structural force transmission connection with the structural column 14 or the beam end of the edge beam 12 of the other, one of the following two mutually exclusive but equivalent connection construction schemes is adopted. Both of them complete the precise positioning and anchoring of embedded parts / reinforcing bars in the component during the factory prefabrication stage, and achieve rapid and reliable assembly on site through standardized operations:

[0086] Option 1: Butt connection using pre-embedded steel connectors:

[0087] like Figures 11 to 13 As shown, a first connector 15 is pre-embedded inside the end of the side beam 12 to be connected. The first connector 15 is a rectangular steel plate, T-shaped steel or I-shaped steel, which protrudes 200~300mm from the surface of the side beam 12. The first connector 15 is welded to the steel bars in the side beam 12 in the factory.

[0088] Correspondingly, a second connector 16 is pre-embedded at the same elevation position on the top of the structural column 14 to which it is spliced. Its structure, size and material are completely matched with the first connector 15. The second connector 16 protrudes from the surface of the structural column 14, and the length of the connection area between the two connectors is generally 200~300mm.

[0089] During on-site installation, after hoisting the two module units 1 into place, ensure that the exposed end faces of the first connector 15 and the second connector 16 are tightly fitted together. Use high-strength bolts to evenly arrange no less than 4 fastening points along the surface of the connector plate, or use on-site welding to complete the rigid connection. After the connection is completed, set up a template around the connection area, and then pour concrete to wrap the connector and bolt / weld area to form an integrated reinforced node.

[0090] The advantage of Option 1 is that the edge beam 12 and structural column 14 do not require exposed reinforcement, thus avoiding the difficulties in processing and transportation caused by the large diameter and long length of the reinforcement bars in the edge beam 12 and structural column 14. In addition, traditional steel bars rely on grouting sleeves or post-poured concrete for connection. The grout or concrete needs time to reach its strength, which affects the continuity of installation. In contrast, steel connectors can be connected and bear load immediately, allowing for continuous installation and improving construction efficiency.

[0091] It should be noted that when the beam end of one side beam 12 is connected to the beam end of the other side beam 12 in two spliced ​​module units 1, if the side beam 12 in one module unit 1 is also vertically connected to other side beams 12, the first connector 15 or the second connector 16 in the side beam 12 shall have through holes for the reinforcing bars in the adjacent side beams 12 in the same module unit 1 to pass through and be welded. Alternatively, connectors that connect to the internal reinforcing bars of the adjacent side beams 12 may be provided, and the connectors shall be vertically connected to the corresponding first connector 15 or the second connector 16.

[0092] Option 2: Factory-prefabricated extended steel bars for butt connection:

[0093] like Figure 14 As shown, when the side beam 12 is prefabricated in the factory, the first steel bar 17 at the bottom of its inner part extends outward at the beam end, and the axis of the first steel bar 17 is parallel to the length direction of the side beam 12.

[0094] At the corresponding position of the structural column 14 to which it is spliced, a second steel bar 18 is pre-embedded, which matches the specifications, quantity and spatial positioning of the first steel bar 17.

[0095] During on-site assembly, the two module units 1 are first precisely positioned, and the first steel bar 17 and the second steel bar 18 are connected. After the connection is completed, a combined formwork is erected around the steel bar connection area, and shrinkage-compensating concrete of the same strength grade is poured.

[0096] Both of these solutions together achieve a closed-loop quality control system encompassing "precise factory prefabrication – rapid on-site assembly – controllable node performance." Compared to traditional wet-work nodes, the on-site rebar tying time can be effectively reduced, as can the amount of formwork support and dismantling, and the concrete pouring cycle.

[0097] It should be noted that, as Figures 15 to 18 As shown, the connection between the floor slab component 13 and the structural column 14 can also adopt the connection method of Scheme 1 or Scheme 2 mentioned above. To save space, it will not be described in detail here.

[0098] In an optional implementation, in at least one pair of module units 1, the floor slab assembly 13 of one is connected to the beam side of the edge beam 12 or the floor slab assembly 13 of the other.

[0099] Specifically, such as Figures 19 to 20 As shown, the two adjacent horizontally spliced ​​module units 1 are connected by a heterogeneous connection between the floor slab assembly 13 and the side beam 12 to achieve structural collaborative force transmission.

[0100] Specifically, the edge beam 12 extends along the horizontal edge of the module unit 1, and its cross-section is rectangular. Space is reserved on one edge facing the adjacent module unit 1 for overlapping the floor slab assembly 13. The module unit 1 also includes a prefabricated side plate 1012; the floor slab assembly 13 includes a top plate 131 connected to one end of the side plate 1012 and / or a bottom plate 132 connected to the other end of the side plate 1012. When the edge beam 12 connects to an adjacent module unit 1, the edge beam 12 is positioned outside the side plate 1012 within the module unit 1. Figure 20 For example, the top plate 131 in the floor slab assembly 13 is prefabricated with a third steel bar 19. The top plate 131 extends beyond the side plate 1012, satisfying the requirement that the overlap length with the side beam 12 of the adjacent module unit 1 is 10~20mm. The third steel bar 19 is exposed vertically from the side of the slab and extends to the center line of the side beam 12. The third steel bar 19 is connected to the side beam 12 through concrete.

[0101] In the above embodiments, the floor slab assembly 13 directly bears the floor load; the edge beam 12 serves as a linear bending member, providing lateral and / or longitudinal stiffness and torsional restraint; the two are constructed through a composite structure of "floor slab assembly 13 and edge beam 12 lap joint + exposed steel reinforcement + post-cast concrete", which not only achieves the same stress performance as cast-in-place structures, but also effectively reduces the workload of on-site formwork, steel reinforcement binding and concrete pouring, significantly improving assembly efficiency and connection reliability.

[0102] It should be noted that when module unit 1 with edge beam 12 is equipped with floor slab assembly 13, such as Figure 20As shown, the factory anchors the top plate 131 of this module unit 1 to its own side beam 12. The top plate 131 does not exceed the centerline of the side beam 12, and the remaining beam width is the reserved space for the top plate 131 of the module unit 1 to be spliced ​​to overlap.

[0103] In alternative implementations, such as Figure 21 and Figure 22 As shown, when two adjacent module units 1 are spliced ​​horizontally and neither of them has a side beam 12:

[0104] The floor slab assembly 13 of each module unit 1 is pre-embedded with the fourth steel bar 110 during the factory prefabrication stage, and is vertically exposed from the side of the floor slab assembly 13 to be spliced.

[0105] Before the two module units 1 are in place and assembled, a bottom formwork 1011 is installed below the exposed fourth steel bar 110 of the floor slab component 13 of any one of the module units 1. The bottom formwork 1011 can be prefabricated in the module unit 1 or installed on site. It is a flat temporary support formwork made of steel, wood or aluminum alloy.

[0106] During on-site installation, the two sets of fourth reinforcing bars 110 are aligned and overlapped above the bottom formwork 1011. Then, concrete is poured on the bottom formwork 1011 to completely cover the exposed sections and overlap areas of the two sets of fourth reinforcing bars 110 and compact it.

[0107] The above-described implementation method enhances the overall bending stiffness and shear bearing capacity of the joint by the continuous penetration of the fourth reinforcing bar 110 and the restraint effect of the concrete.

[0108] It should be noted that in the existing modular housing system, the precast slabs on the top surface of the box do not have reinforcement bars at the ends, and the additional reinforcement bars at the junction are located at the neutral axis of the slab's stress. This severely weakens the effective bending height of the slab, resulting in a significant reduction in the effective cross-section of the structural columns under out-of-plane bending. Consequently, the out-of-plane bending stiffness and bending bearing capacity of the structural columns under a major earthquake cannot reach the full effective height of the cross-section, making them unequal to cast-in-place structures. The above-described implementation method fundamentally solves the problem of severely weakened effective cross-section height caused by "no reinforcement bars at the ends of the precast slabs and additional reinforcement bars placed at the neutral axis" in the existing modular housing technology system by reconstructing the connection structure of the top slab 131. Specifically, the above-described implementation method abandons the traditional practice of passively adding additional reinforcement bars at the neutral axis at the junction, and instead adopts a method in which the third reinforcement bar 19 is exposed from the side of the floor slab assembly 13 and connected to the edge beam 12 through concrete, or the fourth reinforcement bar 110 in the two floor slab assemblies 13 is connected through concrete poured on the bottom formwork 1011. The above structure positions the tensile reinforcement at a reasonable lever arm position in the cross section, restores the effective bending height of the entire cross section, and ensures that the cast-in-place and precast parts are stressed and deformed in coordination. Thus, under the action of a major earthquake, the connection area of ​​the floor slab at the top of the structural column has the same out-of-plane bending stiffness, yield behavior and ultimate bearing capacity as the cast-in-place structure.

[0109] In alternative implementations, such as Figure 23 As shown, module unit 1 also includes a lightweight infill wall 11 installed on the outside of side panel 1012. The lightweight infill wall 11 is a standardized panel component prefabricated in the factory, and its material is preferably at least one of autoclaved aerated concrete board, foamed cement board, light steel keel composite gypsum board or honeycomb aluminum board.

[0110] Specifically, the lightweight infill wall 11 does not extend the entire height of the module unit 1 in the vertical direction. A certain structural gap is reserved between its top and the upper edge of the module unit 1. This gap is filled and compacted simultaneously by the edge concrete of the edge beam 12 or floor slab assembly 13 after the module unit 1 is assembled on site. This ensures the function of the external enclosure while preventing the lightweight infill wall 11 from participating in the vertical load transfer. Sufficient space is reserved at the top of the lightweight infill wall in the beam end connection area to facilitate on-site connection operations of beam end and column end connectors.

[0111] In addition, the installation position of the lightweight infill wall 11 is spatially decoupled from the prefabricated edge beams 12, floor slab components 13 and structural columns 14 inside the module unit 1: they are independent of each other in terms of stress path, construction process and inspection and acceptance.

[0112] In alternative implementations, such as Figure 24 As shown, the upper and lower structural columns 14 can be connected by steel bars and grouting sleeves.

[0113] In alternative implementations, such as Figure 25As shown, the top of the structural column 14 has an upward protrusion 141 that protrudes above the top surface elevation of the module unit 1, and a first clearance space 145 is provided between the bottom end of the structural column 14 and the bottom surface elevation of the module unit 1 for the upper protrusion 141 of the lower structural column 14 to extend into.

[0114] In the above embodiments, since the top of the structural column 14 has an upward protrusion 141 that protrudes above the top surface elevation of the module unit 1, it is convenient for workers to carry out on-site construction operations. The first clearance space 145 at the bottom of the structural column 14 allows the lower structural column 14 to extend in, thereby forming a stable splicing structure in the vertical direction.

[0115] In other embodiments, the bottom end of the structural column 14 may have a downward protrusion that protrudes below the bottom surface elevation of the module unit 1, and a third clearance space may be provided between the top end of the structural column 14 and the top surface elevation of the module unit 1 for the downward protrusion of the upper structural column 14 to extend into.

[0116] Based on the above-described embodiments, such as Figure 25 As shown, a downward-extending steel section 142 is pre-embedded at the bottom of the upper structural column 14, and the downward-extending steel section 142 is connected to the longitudinal reinforcement inside the structural column 14; an upward-extending steel section 143 is pre-embedded at the top of the lower structural column 14, one end of the upward-extending steel section 143 is connected to the longitudinal reinforcement inside the structural column 14, and the other end is connected to the downward-extending steel section 142.

[0117] The above method is convenient for construction operations and is more efficient than the method of connecting with steel bars and grouting sleeves.

[0118] The aforementioned upward-extending steel section 143 and downward-extending steel section 142 can be made of rectangular steel plates, T-shaped steel or I-shaped steel.

[0119] In alternative implementations, such as Figure 26 As shown, the lower extension steel 142 and the upper extension steel 143 form a cavity with a side opening. The edge of the side opening is provided with an inner lining eave 146. The lower extension steel 142 and the upper extension steel 143 are also connected by a sealing plate 147, which is located at the side opening and abuts against the inner lining eave 146.

[0120] During construction, when a side plate 1012 of module unit 1 exists on one side of structural column 14, after the lower extension steel 142 and upper extension steel 143 are in place, if welding cannot be performed from the outside, welding can be performed from the inside through the opening. Then, the opening is sealed from the outside by welding with a sealing plate 147. Therefore, the opening must be located on the side without side plate 1012. In the above process, the inner lining eaves 146 provide auxiliary fixing and welding lining for the sealing plate 147.

[0121] In alternative implementations, such as Figure 27As shown, the top of the structural column 14 is level with the top surface of the module unit 1, and the structural column 14 is pre-set with an upward vertical rib 144 protruding from its own top surface. A second clearance space 148 is provided between the bottom end of the structural column 14 and the bottom surface of the module unit 1 for the upward vertical rib 144 of the lower structural column 14 to extend into. Concrete is poured in the second clearance space 148.

[0122] In other embodiments, the bottom end of the structural column 14 is flush with the bottom surface of the module unit 1, and the structural column 14 is provided with a downward extending vertical rib protruding from its own bottom surface. A fourth clearance space is provided between the top end of the structural column 14 and the top surface of the module unit 1 for the downward extending vertical rib of the upper structural column 14 to extend into. Concrete is poured in the fourth clearance space.

[0123] The above-described implementation method avoids the strict dependence of traditional grouting sleeves on the positioning accuracy of reinforcing bars, and improves the error tolerance rate and construction efficiency of on-site assembly. At the same time, since the upper vertical bar 144 or the lower vertical bar penetrates the structural column 14 and is embedded in the cast-in-place grout, the stress change and weak link caused by "the need for lap splicing of the split reinforcing bars at the floor" in the semi-cast-in-place and semi-precast system are eliminated, so that the modular structure has a stable and reliable plastic hinge development capability under seismic cyclic loads.

[0124] A second aspect of the present invention provides a construction method for a prefabricated concrete frame integrated modular housing structure. The construction method for the prefabricated concrete frame integrated modular housing structure provided in this second aspect of the present invention utilizes the aforementioned prefabricated concrete frame integrated modular housing structure and includes:

[0125] Based on the building layout plan and structural calculation model, all module units 1 are prefabricated in the factory; then, several module units 1 are hoisted into place and spliced ​​into the lower building structure. When assembling the lower building structure, the splicing method is adopted in the same direction.

[0126] It should be noted that during on-site hoisting, the module unit 1 equipped with the edge beam 12 is hoisted first. After it is temporarily fixed, leveled and corrected, the module unit 1 equipped with the floor slab assembly 13 is hoisted. The beam end of the edge beam 12 of one of the two adjacent module units 1 is connected to the structural column 14 or the beam end of the edge beam 12 of the other, and / or, the floor slab assembly 13 of one is connected to the beam side of the edge beam 12 or the floor slab assembly 13 of the other, and then the composite layer concrete 2 is poured, and concrete is poured at the connection of the above structures.

[0127] The subsequent construction includes leveling layer (generally 20mm thick) and grouting around module unit 1 and wall end face.

[0128] Subsequently, the upper module unit 1 is hoisted, and the upper structural column 14 is connected to the lower structural column 14 via a grouting sleeve or connecting assembly. The connecting assembly includes an upper extending steel section 143 and a lower extending steel section 142, or includes an upper extending vertical rib 144 or a lower extending vertical rib. When the lower extending steel section 142 and the upper extending steel section 143 form a cavity with a side opening, high-strength grout is poured into the cavity, and then the outside is wrapped with concrete. Once the designed strength is reached, the adjacent module unit 1 is hoisted until completion.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated concrete frame integrated modular housing structure, characterized in that, Includes at least one floor of building structure; The building structure at least one floor includes a structural column assembly forming a supporting frame, the structural column assembly including at least one structural column (14). The building structure of at least one floor comprises multiple modular units (1) that are spliced ​​together and prefabricated as a single unit. Each modular unit (1) includes at least one of the following: a side beam (12), a floor slab assembly (13), and a structural column (14) prefabricated therein. In at least one pair of the module units (1): the adjacent corners of the two module units (1) together form a first splicing area (3), the first splicing area (3) is provided with only one structural column (14), the structural column (14) is prefabricated in any one of the module units (1) and connected to the beam end of the prefabricated side beam (12) in the other module unit (1) or the floor slab assembly (13), and the periphery of the connection area is supported by formwork and concrete is poured.

2. The prefabricated concrete frame integrated modular housing structure according to claim 1, characterized in that, In at least one pair of the module units (1): the floor slab assembly (13) of one is connected to the beam side of the side beam (12) of the other or the floor slab assembly (13).

3. The prefabricated concrete frame integrated modular housing structure according to claim 1, characterized in that, In the house structure provided with the structural column assembly, the structural column (14) is prefabricated within the module unit (1) located at the edge.

4. The prefabricated concrete frame integrated modular housing structure according to claim 1, characterized in that, The top of the structural column (14) has an upward protrusion (141) that protrudes above the top surface elevation of the module unit (1), and a first clearance space (145) is provided between the bottom end of the structural column (14) and the bottom surface elevation of the module unit (1) for the upper protrusion (141) of the lower structural column (14) to extend into. Alternatively, the bottom end of the structural column (14) has a downward protrusion that protrudes below the bottom surface elevation of the module unit (1), and a third clearance space is provided between the top end of the structural column (14) and the top surface elevation of the module unit (1) for the downward protrusion of the upper structural column (14) to extend into.

5. The prefabricated concrete frame integrated modular housing structure according to claim 4, characterized in that, The bottom of the upper structural column (14) is pre-embedded with a downward-extending steel section (142), which is connected to the longitudinal reinforcement in the structural column (14). An upward-extending steel section (143) is pre-embedded at the top of the structural column (14) located in the lower layer. One end of the upward-extending steel section (143) is connected to the longitudinal reinforcement in the structural column (14), and the other end is connected to the downward-extending steel section (142).

6. The prefabricated concrete frame integrated modular housing structure according to claim 5, characterized in that, The lower extension steel (142) and the upper extension steel (143) form a cavity with a side opening. The edge of the side opening is provided with an inner lining eave (146). The lower extension steel (142) and the upper extension steel (143) are also connected by a sealing plate (147). The sealing plate (147) is located in the side opening and abuts against the inner lining eave (146).

7. The prefabricated concrete frame integrated modular housing structure according to claim 1, characterized in that, The top of the structural column (14) is level with the top surface of the module unit (1), and the structural column (14) is provided with an upward vertical rib (144) protruding from its own top surface. A second clearance space (148) is provided between the bottom end of the structural column (14) and the bottom surface of the module unit (1) for the upward vertical rib (144) of the lower structural column (14) to extend into. Concrete is poured in the second clearance space (148). Alternatively, the bottom end of the structural column (14) is flush with the bottom surface of the module unit (1), and the structural column (14) is provided with a downward vertical bar protruding from its own bottom surface. A fourth clearance space is provided between the top end of the structural column (14) and the top surface of the module unit (1) for the downward vertical bar of the upper structural column (14) to extend into. Concrete is poured in the fourth clearance space.

8. The prefabricated concrete frame integrated modular housing structure according to claim 1, characterized in that, In at least one pair of the module units (1): One of the side beams (12) or the floor slab assembly (13) is pre-embedded with a first connector (15) protruding from the side beam (12) or the floor slab assembly (13), and the other of the structural columns (14) is pre-embedded with a second connector (16), the second connector (16) protruding from the structural column (14) and connected to the first connector (15); Alternatively, the first reinforcing bar (17) prefabricated in the side beam (12) or the floor slab assembly (13) of one of them is exposed, and the second reinforcing bar (18) prefabricated in the structural column (14) of the other is exposed and connected to the first reinforcing bar (17).

9. The prefabricated concrete frame integrated modular housing structure according to claim 2, characterized in that, In at least one pair of the module units (1): The edge of the side beam (12) is reserved with space for connection of the floor slab assembly (13). The floor slab assembly (13) is prefabricated with a third steel bar (19). The third steel bar (19) is exposed from the side of the floor slab assembly (13) and connected to the side beam (12) through concrete. Alternatively, a fourth reinforcing bar (110) may be prefabricated in each of the two adjacent floor slab components (13), and the fourth reinforcing bar (110) may be exposed from the slab side of the corresponding floor slab component (13); a bottom mold (1011) may be provided on the side of one of the module units (1), and the bottom mold (1011) may be located below the exposed part of the fourth reinforcing bar (110), and the fourth reinforcing bars (110) in the two floor slab components (13) may be connected by concrete poured on the bottom mold (1011).

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