Horizontal connection structure and construction method for multi-storey and high-rise concrete modular composite buildings

Abstract

The invention provides a multi-storey and high-rise concrete modular composite building (1) comprising a plurality of prefabricated concrete modules, wherein the building comprises: a plurality of prefabricated concrete modules, wherein the plurality of prefabricated concrete modules are arranged adjacent to each other in a single storey of the multi-storey and high-rise concrete modular composite building (1) to form a pouring space between the vertical concrete walls (1.1) that allows pouring of concrete and forming a composite wall, wherein the sunk grouting zones (3) are arranged in pairs on both sides of the composite wall and allow the pair of connecting pieces (1.3) to be arranged spaced apart from each other; further comprising additional crosspieces (4) provided in the sunk grouting zones (3) to indirectly cross each other with the pair of connecting pieces (1.3) and form a horizontal connection structure capable of bearing lateral loads by means of the concrete poured in the sunk grouting zones (3). It also relates to a method for constructing the multi-storey and high-rise concrete modular composite building (1).

Description

TECHNICAL FIELD

[0001] The present application relates to the field of prefabricated concrete construction. Specifically, it relates to horizontal connection between three-dimensional box-type prefabricated concrete modules for building multi-story and high-rise concrete modular composite buildings and the construction method thereof, so as to improve the lateral force resistance performance of multi-story and high-rise concrete modular composite buildings and improve the construction efficiency thereof. BACKGROUND

[0002] Modular construction technology is considered to be the prefabricated construction technology with the highest prefabrication level. Unlike traditional one-dimensional prefabricated components (such as beams, columns) or two-dimensional prefabricated components (such as walls, boards), modular construction technology uses three-dimensional box-type modules that have been pre-finished as basic prefabricated units, which are assembled on site to form modular composite buildings with different use functions. By using modular construction technology to build buildings, the module production and internal decoration processes can be transferred to the factory, which maximizes the reduction of on-site construction work. This not only helps to improve the construction quality, but also shortens the on-site construction time, saves labor and natural resources, reduces the impact on the surrounding environment, is a green, low-carbon and energy-saving construction method, and meets the inherent requirements of the current construction industry.

[0003] The modules currently used can be divided into steel modules and concrete modules according to the main materials used. Steel modules have been more widely used due to their advantages such as light hoisting weight, flexible building space layout, and mature prefabricated and assembled steel structure technology. However, due to the disadvantages of fire resistance, sound insulation, and cost, the application of steel modules is mainly concentrated in public buildings such as hotels, apartments, and dormitories. Concrete modules have a higher acceptance in private residential buildings, but there are fewer related researches and applications. For multi-story and high-rise concrete modular composite buildings, the vertical load-bearing capacity of concrete modules is generally not a problem because of their good self-bearing capacity under pure vertical load. However, under the action of lateral loads such as earthquakes and winds, reliable horizontal connections are needed to ensure that the lateral force resisting members (such as module walls and core tubes) in the same layer can work together to make the entire concrete modular composite building have sufficient lateral force resistance.

[0004] There are mainly two kinds of horizontal connections and methods used in existing concrete modular composite buildings to achieve sufficient lateral force resistance. One is to cast a layer of reinforced concrete in-situ on the top surface of the concrete module to form a composite floor with the module top plate inside the concrete module, which is used to meet the need of horizontal transfer of lateral forces between different lateral force resisting members. This method of setting a layer of reinforced concrete in-situ has a large amount of wet work on site, which is time-consuming and labor-intensive, and weakens the advantages of modular construction technology, which is not conducive to the popularization and application of concrete modular composite buildings.

[0005] Another method is to set wider holes or gaps in the middle of the adjacent concrete module walls, and add exposed mechanical connecting members such as channel steel, steel bar truss, etc. in these holes and gaps, and then perform site grouting to form a composite wall to transfer the lateral force of the structure. Although this method does not need to perform large grouting of the cast-in-place concrete layer as in the above method, the composite wall formed is thicker, often more than 250 mm. When used in building projects with many rooms, the excessive composite wall will significantly reduce the usable area of the floor, and the pre-set exposed connecting members may affect the transportation, hoisting and installation of the modules, affecting the overall construction efficiency and the project benefits of the builders, and weakening the enthusiasm of the builders to adopt modular construction methods. Furthermore, the embedded multiple exposed mechanical connecting members in the adjacent concrete module walls will increase the manufacturing cost and manufacturing cycle of the concrete modules, which is not conducive to the popularization and application of concrete modular buildings. Further, in order to improve the strength and integrity of the composite wall, tie members such as steel bars are lapped between the exposed mechanical connecting members. This lapping requires a large amount of manual work on site to bend, insert and lap the steel bars, and since the mechanical connecting members that need to be tied are located in the gaps in the middle of the adjacent concrete module walls, which are difficult for workers to access, the construction is difficult, the construction efficiency is low, and the construction effect is difficult to guarantee.

[0006] Therefore, there is an urgent need to improve the horizontal connection between prefabricated concrete modules and the construction method thereof for multi-story and high-rise concrete modular combined buildings. SUMMARY

[0007] Therefore, the object of the present application is to provide an improved horizontal connection and construction method thereof for multi-story and high-rise concrete modular combined buildings to solve the above technical problems.

[0008] According to one aspect of the present application, a multi-storey and high-rise concrete modularized combined building is provided, which comprises a plurality of prefabricated concrete modules, wherein: a first prefabricated concrete module, wherein at least a part of the module is load-bearing, and the first prefabricated module comprises at least two vertical concrete walls and a horizontal bottom plate and a first horizontal top plate arranged perpendicularly to the vertical concrete walls, wherein the first horizontal top plate is provided with at least one first sunken grouting area adjacent to the vertical concrete walls and pre-provided with a first connecting member; a second prefabricated concrete module, wherein at least a part of the module is load-bearing, and the second prefabricated module comprises at least two vertical concrete walls and a horizontal bottom plate and a second horizontal top plate arranged perpendicularly to the vertical concrete walls, wherein the second horizontal top plate is provided with at least one second sunken grouting area adjacent to the vertical concrete walls and pre-provided with a second connecting member; wherein the first prefabricated concrete module and the second prefabricated concrete module are arranged adjacent to each other in a single storey of the multi-storey and high-rise concrete modularized combined building, to form a pouring space between the vertical concrete walls of the first prefabricated concrete module and the vertical concrete walls of the second prefabricated concrete module, which allows pouring of concrete and forming of a composite wall, wherein the first sunken grouting area and the second sunken grouting area can be arranged on both sides of the composite wall in pairs and allow the first connecting member and the second connecting member to be positioned in pairs and arranged in pairs; and further comprising an additional lapping member arranged in the first sunken grouting area and the second sunken grouting area arranged in pairs, wherein the additional lapping member is indirectly lapped with the first connecting member and the second connecting member arranged in pairs in a staggered manner, and forms a horizontal connection structure capable of bearing lateral load by means of the concrete poured into the first sunken grouting area and the second sunken grouting area.

[0009] Thus, according to the present application, a sunken grouting area is provided on the horizontal top plate of two adjacent prefabricated concrete modules, and a connecting member is left; an additional lapping member is used to perform indirect lapping connection with the connecting member of the horizontal top plate in a staggered manner, and high-performance grouting material is filled in the sunken grouting area, thereby novelly forming a horizontal connection structure. Furthermore, high-performance grouting material is filled in the gap between the module walls of the two adjacent concrete modules to form an intermediate cast-in-place grouting layer, thereby allowing it to cooperate with the above horizontal connection structure to transfer and resist the lateral load in the prefabricated concrete module building. According to the present application, not only can the construction efficiency of the prefabricated concrete module building be improved, the amount of on-site construction work and the number of required formworks can be reduced, and the thickness of the composite wall formed between the modules can be reduced, but also the load-bearing capacity of the connection between the modules can be improved by optimizing the construction measures and the commonly used surface treatment method of concrete members, thereby improving the structural integrity and lateral resistance of the entire concrete module building and the construction efficiency.

[0010] In a preferred aspect of the invention, each of the first and second precast concrete modules has an equal number of first and second sinking grouting zones and opposite positions spaced along the extension direction of its horizontal top plate, thereby forming multiple distributed horizontal connection structures between the first and second precast concrete modules. This allows for the formation of distributed horizontal connection structures in a manner convenient for on-site workers, which helps improve the efficiency of on-site operations.

[0011] In a preferred aspect of the invention, the first precast concrete module and the second precast concrete module each have a first sinking grouting zone and a second sinking grouting zone opposite to each other along the extension direction of their horizontal top plates, thereby forming a single, centrally arranged horizontal connection structure between the first precast concrete module and the second precast concrete module. This facilitates the formation of sinking grouting zones in the precast concrete modules in a simple and low-cost manner.

[0012] In a preferred aspect of the invention, the first and second connectors are respectively pre-anchored steel bars in the first and second grouting zones, wherein the steel bars do not extend beyond the first and second grouting zones. This allows for the avoidance of interference or collisions between adjacent modules during hoisting when assembling precast concrete modules, thereby improving on-site installation efficiency. Furthermore, compared to existing technologies, it offers a higher degree of prefabrication and a larger proportion of precast concrete in the total floor slab volume, which is highly beneficial for reducing component costs and achieving standardized production.

[0013] In a preferred aspect of the invention, the additional lap joint is centrally arranged relative to the composite wall such that its horizontal connection length with the first and second connectors is substantially the same. The length of the additional lap joint can be determined according to local reinforcement anchorage length design specifications. This allows workers to reliably perform staggered indirect lap joints and helps to improve the strength of distributed horizontal connections.

[0014] In a preferred aspect of the invention, the additional lap joint is located approximately flush with the bottom surface of the first and second sunken grouting zones and the top surface of the composite wall. This allows workers to perform staggered lap joint operations in an easily accessible manner, thereby improving on-site work efficiency.

[0015] As a preferred aspect of the present application, wherein the first and / or second sinking grouting zone is designed as a rectangular notch stepped out at the edge of the horizontal roof, the size of the first and / or second sinking grouting zone is determined according to the local design code and the result of the stress calculation analysis of the module. Thus, it allows the sinking grouting zone suitable for the modular combined building of different regions and different height to be prefabricated in the factory, thereby reducing the workload of the site operation.

[0016] As a preferred aspect of the present application, wherein the width of the pouring space formed between the vertical concrete wall of the first prefabricated concrete module and the vertical concrete wall of the second prefabricated concrete module in the horizontal direction is usually not more than 20mm. Thus, it allows the multi-storey and high-rise concrete modular combined building according to the present application to have a high cost-effective floor area ratio (use area / building area), thereby significantly improving the project income of the builders.

[0017] As a preferred aspect of the present application, wherein the first and / or second prefabricated concrete module is designed as a structural concrete module capable of bearing shear force and gravity or a non-structural concrete module capable of bearing only gravity. Thus, it allows the present application to be more flexible for building multi-storey and high-rise concrete modular combined buildings, and helps the standardized production of prefabricated concrete modules in the factory, which only needs to be accurately installed on site later, which helps to improve the manufacturing and construction efficiency.

[0018] According to another aspect of the present application, there is also provided a method for constructing a multi-storey and high-rise concrete modular composite building using the horizontal connection according to the present application, characterized in that the construction steps are as follows: Step A, providing a plurality of prefabricated concrete modules, wherein each of the prefabricated concrete modules comprises at least two vertical concrete walls and horizontal bottom and top plates arranged perpendicularly to the vertical concrete walls, wherein at least one sunken grouting area is prefabricated on the horizontal top plate of the prefabricated concrete module, and a connecting piece is provided in the sunken grouting area; Step B, vertically hoisting one concrete module into position at the base layer or the transfer layer of the multi-storey and high-rise concrete modular composite building, and then hoisting another concrete module into position adjacent to the already hoisted concrete module to form a pouring space between the vertical concrete walls of the two, wherein the horizontal top plates of the two are flush; Step C, sealing both sides of the pouring space to form a formwork for cast-in-place operation, and then pouring grouting material into place until an intermediate cast-in-place grouting layer is formed, wherein the top surface of the intermediate cast-in-place grouting layer is flush with the bottom surface of the sunken grouting area, and the intermediate cast-in-place grouting layer forms a composite wall together with the adjacent vertical concrete wall; Step D, providing an additional lap joint piece in the sunken grouting area so that it indirectly overlaps with the connecting piece in a staggered manner; and Step E, pouring grouting material into place in the sunken grouting area provided with the additional lap joint piece until the top surface of the sunken grouting area is flush with the horizontal top plate.

[0019] Some of the other features and advantages of the present application will become apparent from a reading of the detailed description of the application, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] Embodiments of the present application will now be described in detail in connection with the accompanying drawings, in which:

[0021] Figure 1 is a schematic view of hoisting a concrete module on site for constructing a multi-storey and high-rise concrete modular composite building according to the present application;

[0022] Figures 2-11 is a schematic view of an embodiment of the horizontal connection structure of a concrete module according to the present application, wherein a distributed horizontal connection structure is formed, wherein Figure 2 is a side view of a concrete module of the present application, wherein the sunken grouting area and the connecting piece located therein are clearly shown;

[0023] Figure 3 is a partial enlarged sectional view of the horizontal connection structure of a concrete module of the present application, wherein the sunken grouting area and the connecting piece and the additional lap joint piece located therein are clearly shown;

[0024] Figures 4-11is a schematic view of the horizontal connection structure of the concrete module of the present application, in which the sinking grouting area and the connecting member and the additional lap member located therein are clearly shown. In which, Figure 4 、 Figure 5 、 Figure 8 、 Figure 10 is a schematic view of the state of the concrete module at different construction stages, Figure 6 is a sectional view of the horizontal connection structure of the concrete module of the present application, Figure 7 、 Figure 9 、 Figure 11 is a top view of three typical steps of the construction process of the horizontal connection structure of the concrete module of the present application.

[0025] Figures 12-13 is a schematic view and a top view of another embodiment of the horizontal connection structure of the concrete module of the present application, in which a centralized horizontal connection structure is formed, in which the sinking grouting area and the connecting member located therein are clearly shown.

[0026] BRIEF DESCRIPTION OF DRAWINGS 1A, 1B - concrete module, 1.1 - concrete wall (vertical), 1.2 - horizontal top plate, 1.3 - connecting member; 2 - intermediate cast-in-place grouting layer; 3 - sinking grouting area; 4 - additional lap member. DETAILED DESCRIPTION

[0027] Although the drawings are provided to present some embodiments of the present application, the drawings are not necessarily drawn to scale of the specific embodiments, and some features can be enlarged, removed or cut to better show and explain the disclosure of the present application. Some components in the drawings can be adjusted in position according to actual needs without affecting the technical effects. The phrase "in the drawings" or similar language appearing in the specification does not necessarily refer to all the drawings or examples.

[0028] Here, all directional words (e.g. upward, downward, upward, downward, left, right, left, right, top, bottom, upper, lower, vertical, horizontal) are used only for identification purposes to help the reader understand the present application, and are not limiting, especially to the position, direction or use of the present application.

[0029] In addition, the terms "first", "second" and the like used in the present application do not represent any order, number or importance in the present application, but are used to distinguish one component from other components.

[0030] In Figure 1Multistory and high-rise concrete buildings such as high-rise apartment buildings and office buildings are shown in which the modular construction technique can be used to speed up the construction process and improve the quality of the construction. In particular, the modular construction technique can be the assembly composite building method in which prefabricated concrete modules 1 are made in a factory and then assembled on site into a multistory and high-rise concrete modular composite building. In general, the prefabricated concrete modules 1 can form a unit of the building, such as a room or a portion of a room of an apartment, a suite, an office, and are formed with plumbing, electrical wiring, built-in cabinets, etc. Although the prefabricated concrete modules 1 shown in Figure 1 are intended for use in constructing the upper floors of a modular composite building, it will be appreciated by those skilled in the art that it is also possible to construct the prefabricated concrete modules 1 on the first floor above the base or transfer floor.

[0031] As shown in Figure 1 , the prefabricated concrete modules 1 can include up to four vertical walls, a ceiling and a floor; or, they can have less than four walls and only a ceiling or a floor, with the third and / or fourth walls and ceiling or floor being provided by adjacent modules. As shown in Figure 1 , the prefabricated concrete modules 1 can be lifted into place by a crane and connected together to form an integrated structure.

[0032] Because multistory and high-rise buildings are more susceptible to extreme conditions such as strong winds (typhoons, hurricanes) or earthquakes, it is important to improve the lateral resistance or horizontal connection strength between adjacent prefabricated concrete modules. To this end, the present invention provides distributed or centralized horizontal connection structures that can be used to improve the lateral resistance of multistory and high-rise concrete modular composite buildings between adjacent prefabricated concrete modules. The present invention also relates to a method of constructing a multistory and high-rise concrete modular composite building that includes such novel horizontal connection structures. To this end, the embodiments of the present invention will be described in more detail below. Figures 1 to 13 The embodiments of the present invention will be described in more detail below. In Figures 2 to 11 , a distributed horizontal connection structure between adjacent prefabricated concrete modules is shown, and in Figures 12-13 , a centralized horizontal connection structure between adjacent prefabricated concrete modules is shown.

[0033] As can be seen from the drawings, in Figure 2A first precast concrete module 1A and a second precast concrete module 1B according to the present application are depicted adjacent to each other. In this embodiment, the first precast concrete module 1A comprises first and second vertical concrete walls 1.1 and has a horizontal floor and first horizontal roof 1.2 attached to the first and second vertical concrete walls 1.1 and arranged perpendicular to the vertical concrete walls 1.1. Thus, the first precast concrete module 1A is able to define an interior space substantially in the shape of a cuboid. Similarly, the second precast concrete module 1B comprises first and second vertical concrete walls 1.1 and has a horizontal floor and second horizontal roof 1.2 attached to the first and second vertical concrete walls 1.1 and arranged perpendicular to the vertical concrete walls 1.1. However, the term "wall" as used in this application also includes a flat wall, a support column or a part of a wall. In short, any support member that can be attached to a floor or a ceiling with additional wall members can be formed as a module according to the present application.

[0034] In this embodiment, each precast concrete module 1A and 1B optionally comprises a load bearing member capable of bearing vertical loads, so that the modules can be used to build multi-storey and high-rise buildings, such as the building shown in Figure 1 The load bearing member can be one of a vertical wall or a support column. When using the precast modules to form a housing unit, various attachments can be incorporated, such as windows, pipes, electrical wiring, built-in units such as kitchen cabinets, flooring, heating, ventilation and air conditioning. By building the various module attachments in a factory environment, they can be factory tested to ensure that all components are working properly before being sent to the building site for assembly, which helps to improve the efficiency of module production and construction. Alternatively, the precast modules can be the shell of a multi-storey or high-rise building that is assembled together and the interior finishing is left to the customer.

[0035] Further, as shown in Figure 2As shown, the first horizontal top plate 1.2 of the first precast concrete module 1A is provided with at least one sunken grouting area 3 adjacent to the vertical concrete wall 1.1, which is pre-provided with first connecting members 1.3. Here, the first sunken grouting area 3 can be prefabricated in the factory, which is shaped like a rectangular notch stepped out at the edge of the horizontal top plate 1.2. As described below, the rectangular notch will be filled with cast-in-place concrete on site during the method of constructing multi-storey and high-rise concrete modular combination buildings. It should be noted that the notch is designed as a rectangle only as an example, and those skilled in the art will understand that it is also feasible to be designed as other shapes such as a square. The size of the notch of the sunken grouting area can be determined according to the lap length between the connecting members and the prefabrication process requirements described below, for example, the lap length can be determined according to the concrete structure design specification of the construction site.

[0036] Here, in order to ensure the reliability of the horizontal connection, the first precast concrete module 1A is spaced apart along the extension direction of the horizontal top plate 1.2 (here, perpendicular to the paper surface direction) by a plurality of sunken grouting areas 3, here as an example by three sunken grouting areas 3, so that a plurality of distributed horizontal connection structures can be formed between the first precast concrete module and the second precast concrete module as described in detail below. Of course, those skilled in the art can understand that it is feasible to provide more sunken grouting areas along the extension direction, depending on the required connection strength and module size.

[0037] Further, as shown more clearly in Figures 3-5 , a plurality of first connecting members 1.3 such as reinforcing bars are respectively pre-anchored in the sunken grouting areas 3 of the first precast concrete module 1A, wherein these first connecting members 1.3 can be anchored in the concrete when the concrete module 1A is prefabricated, which helps to simplify the manufacturing cost and processing cycle of the concrete module. At the same time, these first connecting members 1.3 do not extend beyond the sunken grouting areas 3 that accommodate them, in other words, there are no exposed or extended connecting members such as reinforcing bars around the prefabricated part of the precast concrete module 1A according to the present application, which allows the adjacent modules to avoid interference or even collision during hoisting when assembling the precast concrete module 1A, thereby improving the installation efficiency on site. And as described above, it is not difficult to see that the precast concrete module 1A according to the present application is only provided with connecting members on the horizontal top plate 1.2 at the top, compared with the prior art of adding a large number of mechanical connecting members in the concrete wall 1.1, it has a higher degree of prefabrication and the volume of precast concrete occupies a larger proportion in the total volume of the floor, which is very beneficial for reducing the component cost and realizing standardized production.

[0038] Further, in combination with Figures 2-5As can be seen, the second precast concrete module 1B illustrated here has substantially the same structure as the first precast concrete module 1A. This is more conducive to the standardized production of precast concrete modules in the factory, and only needs to be accurately installed on site later, which helps to improve manufacturing and construction efficiency.

[0039] In order to effectively connect the first precast concrete module 1A and the second precast concrete module 1B to transmit and resist the lateral load in the concrete module building, see Figures 2-3 It can be seen that the first precast concrete module 1A and the second precast concrete module 1B are arranged adjacent to each other in a single layer of a multi-storey and high-rise concrete modular composite building, to form a pouring space between the vertical concrete wall 1.1 of the first precast concrete module 1A and the vertical concrete wall 1.1 of the second precast concrete module 1B, which allows pouring of concrete and forms a composite wall described in detail below. Here, see Figures 5-6 It can be seen that the pouring space is defined by the gap between the vertical concrete wall 1.1 of the first precast concrete module 1A and the vertical concrete wall 1.1 of the second precast concrete module 1B, and after the gap on both sides (two sides perpendicular to the paper) is blocked, the gap will be used as a formwork to form the intermediate cast-in-place grouting layer 2 described below in the subsequent cast-in-place concrete operation. Due to the use of the vertical concrete wall 1.1 of the first precast concrete module 1A and the vertical concrete wall 1.1 of the second precast concrete module 1B as formwork for the construction of the intermediate cast-in-place grouting layer, the construction efficiency is improved, and it conforms to the new direction of green, circular and low-carbon industry development.

[0040] It can be seen that the intermediate cast-in-place grouting layer 2 forms a composite wall with certain lateral force resistance by the bonding action between the grouting material and the exposed aggregate interface between the vertical concrete wall 1.1 of the first precast concrete module 1A and the vertical concrete wall 1.1 of the second precast concrete module 1B. By performing surface treatment such as hydraulic scouring when manufacturing the vertical concrete wall 1.1 of the first precast concrete module 1A and the vertical concrete wall 1.1 of the second precast concrete module 1B in the factory, the roughness of the vertical concrete wall 1.1 can be significantly improved to achieve stronger bonding action with the intermediate cast-in-place grouting layer 2. Due to the reasons described below, the lateral force resistance is achieved by the horizontal connection structure formed by the composite wall and the sunk grouting area of the module horizontal roof, and no mechanical connection member needs to be added in the vertical concrete wall, so the width of the pouring space according to the present application in the horizontal direction (i.e. the thickness of the intermediate cast-in-place grouting layer 2) can be designed to be usually not more than 20 mm, which greatly reduces the distance between the first precast concrete module 1A and the second precast concrete module 1B, thereby allowing the multi-story and high-rise concrete modular combined building according to the present application to have a high cost-effective floor area ratio (useful area / total building area), thereby significantly improving the project income of the construction company.

[0041] Here, referring to Figure 6 It can be seen that the top surface of the intermediate cast-in-place grouting layer 2 is cast-in-place to a height substantially flush with the bottom surface of the sunk grouting area 3 of the first precast concrete module 1A and the second precast concrete module 1B, thereby allowing the additional lapping member 4, such as steel bars, to be placed on the top surface of the intermediate cast-in-place grouting layer 2 and substantially flush with the bottom surface of the sunk grouting area 3 of the first precast concrete module 1A and the second precast concrete module 1B, which allows the additional lapping member 4 to be indirectly lapped at substantially the same height as the pre-anchored connection member 1.3 in the sunk grouting area 3. Due to the sunk grouting area 3 being located on the horizontal roof, it allows workers to easily access the area and place the additional lapping member 4 as required.

[0042] As Figure 3 and Figures 8-9 It is clear that the additional lapping member 4, as an example of four steel bars, is arranged centrally with respect to the composite wall (intermediate cast-in-place grouting layer 2), wherein the additional lapping member 4 is indirectly lapped with the first and second connection members belonging to the first precast concrete module 1A and the second precast concrete module 1B in an interlaced manner. Specifically, the additional lapping member 4 of four steel bars and the first and second connection members of steel bars pre-anchored in the horizontal roof 1.2 are spaced apart from each other in the left-right direction in Figure 3 and Figure 9 There is a certain spacing between the additional lapping member 4 and the first and second connection members in the left-right direction in Figure 3 and Figure 9In the vertical direction, the additional lap splice 4 for four reinforcing bars and the first and second connectors 1.3, which are also reinforcing bars and pre-anchored into the horizontal top slab 1.2, overlap each other. The connection length or lap length of the additional lap splice 4 and the first and second connectors 1.3 pre-anchored into the horizontal top slab 1.2 are substantially the same, and this connection length meets the local reinforcing bar lap splice design requirements for this modular building. Due to the use of an indirect, non-tightening lap splice, the workload of bending or tying reinforcing bars on site is greatly reduced, thus significantly improving on-site work efficiency. On-site workers only need to place the additional lap splice 4 for four reinforcing bars according to the pre-marked positions or with the help of simple measuring tools. It should be noted that, although in Figure 3 The number of additional lap joints 4 is the same as that of the first and second connectors 1.3, but this is not mandatory. Both the number of additional lap joints 4 and their connection length with other connectors can be determined based on site requirements or existing concrete structure design specifications. It should be noted that the four sets of first connectors, second connectors, and additional lap joints 4 in this embodiment are only shown as examples to illustrate the connection method and construction steps of the present invention. Those skilled in the art should understand that due to the influence of concrete module size and material properties, using more or fewer sets of first connectors, second connectors, and additional lap joints 4 is also feasible, as long as the structural design specifications are met and connection and structural safety are ensured; further details will not be elaborated here.

[0043] In addition to significantly reducing the workload of on-site operations, the use of staggered indirect lap splices also helps to diffuse the stress on the reinforcing bars, thereby improving the ultimate bearing capacity of the reinforcing bars.

[0044] Finally, see Figure 10 and Figure 11It can be seen that after the additional lap joint 4 has been placed and indirectly lap jointed with the connecting member 1.3 in a staggered manner, field grouting is performed in the three spaced-apart sunken grouting areas 3 to form a distributed horizontal connecting structure. That is, the grouting material is cast in situ into the sunken grouting area 3 provided with the additional lap joint 4 until the top surface of the sunken grouting area is substantially flush with the horizontal top plate 1.2 and a distributed horizontal connecting structure capable of bearing lateral loads is formed by means of the concrete cast in the sunken grouting area 3. As a result, a plurality of distributed horizontal connecting structures are formed between the first precast concrete module 1A and the second precast concrete module 1B, thereby completing the connection of the two adjacent precast concrete modules 1A and 1B between the layers of the multi-story and high-rise concrete modular combined building. The above operation is sequentially performed in the transfer layer to complete the construction of a layer of the multi-story and high-rise concrete modular combined building. Subsequently, the operation of the next layer is performed on the completed layer, and finally the entire construction of the multi-story and high-rise concrete modular combined building is completed. Compared with the existing method of fully casting the top surface of the precast concrete module to form a composite floor slab, the amount of wet work in the field is significantly reduced, the floor height is reduced, and the cost can be significantly reduced.

[0045] As can be seen from the above description, when the multi-story and high-rise concrete modular combined building according to the present application is subjected to external influences such as typhoons or earthquakes, not only can the composite wall formed by the two adjacent vertical concrete walls 1.1 and the intermediate cast-in-place grouting layer 2 resist lateral forces, but also the distributed horizontal connecting structures formed in the plurality of sunken grouting areas of the horizontal top plate and the composite wall work together to transmit and resist the lateral loads in the concrete module building. Due to the cooperation of the distributed horizontal connections formed by the cast-in-place sunken grouting areas 3 in the horizontal top plate of the concrete modules 1A and 1B and the composite wall formed by the vertical walls of adjacent modules and the intermediate cast-in-place grouting layer, a novel horizontal force transmission mechanism between the concrete modules is formed, which fully utilizes different components in the concrete modules for force transmission and reduces the design requirements for the strength and thickness of the composite wall when relying solely on the composite wall for force transmission. According to the present application, mechanical connecting members do not need to be arranged in the composite wall or wider inter-module wall gaps, which can significantly reduce the thickness of the composite wall formed between the precast concrete modules while ensuring sufficient lateral resistance.

[0046] Further, since the concrete module with distributed horizontal connecting structures according to the present application has good lateral resistance, the concrete module of the present application is not only suitable for structural concrete modules capable of bearing shear forces and gravity. According to the needs, it is feasible to select one or both of the first precast concrete module 1A and the second precast concrete module 1B in the present application as a non-structural concrete module capable of only bearing gravity.

[0047] Next, the construction method for constructing the above multi-storey and high-rise concrete modular composite building according to the present application is described in the following, in which the construction steps are as follows:

[0048] Step A, see Figure 2 , provides a plurality of precast concrete modules 1A and 1B, in which each of the precast concrete modules comprises at least two vertical concrete walls 1.1 and a horizontal bottom plate and a horizontal top plate 1.2 arranged perpendicularly to the vertical concrete walls 1.1, in which at least one recessed grouting area 3 (as an example, Figure 2 three recessed grouting areas 3 in

[0049] Here, as aforementioned, the plurality of recessed grouting areas 3 pre-provided on the horizontal top plate 1.2 of the precast concrete modules 1A and 1B are pre-reserved when the modules are manufactured in the module production factory, and the connecting members 1.3 such as steel bars in the areas are also reserved. As aforementioned, the number, shape and size of the recessed grouting areas 3 are not intended to be limited for each precast concrete module 1A or 1B, as they can be flexibly determined according to the structural design or specifications. As a non-limiting example, the length of the recessed grouting area 3 along the extension direction of the connecting member 1.3 needs to satisfy the lap length of the connecting member 1.3 and the additional lap member 4 to be above 15d and 300mm (mm), and a longer lap length, typically above 30d, is required when the connecting member 1.3 and the additional lap member 4 are in tension; the spacing of the connecting member 1.3 and the corresponding additional lap member 4 needs to satisfy the corresponding specification, such as the distance between each group of steel bar laps to be above d and 25mm (required by the design and construction specification in mainland China) or 2d and 20mm (required by the design and construction specification in Hong Kong Special Administrative Region of China). In the above, d is the smaller one of the diameter of the connecting member 1.3 or the additional lap member 4. When new high-performance grouting material or connecting member 1.3 or additional lap member 1.4 is used, it can also be determined according to the results of the corresponding structural experiments.

[0050] Next, see Figure 4 , in Step B, one of the concrete modules 1A is hoisted vertically into position at the base layer or the upper layer of the multi-storey and high-rise concrete modular composite building 1, in which the edges of the vertical walls 1.1 of the precast concrete module 1A can be strictly aligned with the pre-provided intermediate grouting area edges by means of pre-marking or measuring tools. Subsequently, another precast concrete module 1B is hoisted horizontally to the other side of the pre-provided intermediate grouting area and is aligned along Figure 4the arrow direction in the figure drops to the position immediately adjacent to the concrete module 1A. The position of the precast concrete module 1B after the drop is corrected relative to the position of the concrete module 1A so that the edge of the vertical module of the precast concrete module 1B is strictly aligned with the edge of the preset intermediate grouting zone, which makes the precast concrete module 1B be positioned adjacent to the already positioned concrete module 1A to form a pouring space between the vertical concrete walls 1.1 of both, which allows pouring of concrete and forming of a composite wall, where the horizontal top plates 1.2 of both are substantially flush, at this time the state of the already positioned precast concrete module 1A and the precast concrete module 1B can be seen in Figure 2 .

[0051] Referring to Figures 5-7 It can be seen that in the subsequent step C, the two sides of the pouring space are blocked to form a formwork for the cast-in-place operation. The cast-in-place operation performed here is a self-top-to-bottom grouting process until the grouting to the lower edge of the sunken grouting zone 3 of the horizontal top plate 1.2 of the precast concrete modules 1A and 1B. In order to achieve self-top-to-bottom grouting, a grouting hole and a grout outlet hole are provided in the pouring space that have been blocked, which are located outside the precast concrete modules, wherein the grouting hole is designed for self-top-to-bottom grouting and the grout outlet hole is designed for self-bottom-to-top grouting. It is particularly preferred that the grout outlet hole is arranged at a distance from the grouting hole at a high position to ensure the density of the grouting. Preferably, the above-mentioned grouting hole and grout outlet hole are arranged outside the precast concrete modules 1A and 1B, which reduces the impact on other integrated functions within the precast concrete module unit and improves the role and efficiency of the functional integration of the module unit. Preferably, a grouting channel is additionally provided and has a certain slope, which also helps to improve the efficiency of grouting. The operation of pouring grouting material continues until the intermediate cast-in-place grouting layer 2 is formed, which has a top surface substantially flush with the bottom surface of the plurality of sunken grouting zones 3, wherein the intermediate cast-in-place grouting layer 2 forms a composite wall together with the adjacent vertical concrete wall. Here, the grouting material can be ordinary concrete or high-performance concrete or reactive powder concrete (RPC) and high-strength mortar. The above grouting material helps to improve the bonding strength of the interface and has good self-compacting property.

[0052] Subsequently in step D, referring to Figures 8-9In the plurality of sinking grouting zones 3 arranged in opposite positions, a plurality of additional lapping members 4 are arranged to indirectly lap with the connecting members 1.3 in the plurality of sinking grouting zones 3 in a staggered manner. Since the intermediate cast-in-place grouting layer 2 has formed a composite wall with the adjacent vertical concrete wall 1.1 to have a height level with the sinking grouting zones, it is easy and efficient for the site workers to perform the site staggered indirect lapping steel bar connection work. It will be appreciated by those skilled in the art that the present application is not intended to limit the parameters such as the number, spacing, connection length or steel bar diameter between the additional lapping members 4 and the connecting members 1.3, because these parameters need to be arranged according to local specification requirements or based on test research results. As a non-limiting example, the steel bar diameter in the horizontal top plate 1.2 of the concrete module 1A or 1B can be 12 mm, 16 mm, 20 mm, etc., and the lapping length and spacing parameters have been described above in step A. As long as the steel bar spacing and the connection length of the connecting members such as steel bars in the two precast concrete modules 1A and 1B can make the connecting steel bars fully function and meet the local structural design specification.

[0053] Finally, in step E, referring to Figures 10-11 the grouting material is cast in place into the plurality of spaced sinking grouting zones 3 provided with the additional lapping members 4 until the top surface of the sinking grouting zones 3 is flush with the horizontal top plate 1.2, thereby completing the entire construction process of forming a distributed horizontal connection structure between the adjacent precast concrete modules 1A and 1B. At this time, the grouting material can also be ordinary concrete or high-performance concrete or reactive powder concrete (RPC) and high-strength mortar. The above grouting material helps to improve the bonding strength of the interface and has good self-compacting property.

[0054] Further, another feasible embodiment of the present application is clearly shown in Figures 12-13 Since the present application is not intended to limit the number and size of the sinking grouting zones 3, several smaller sinking grouting zones 3 are combined into one larger sinking grouting zone 3, and further, unlike the above in which a plurality of distributed horizontal connection structures are formed between the precast concrete module 1A and the precast concrete module 1B, it is also feasible to form a single concentrated horizontal connection structure between the two.

[0055] Specifically, in Figure 12 and 13In the shown embodiment, each of the precast concrete modules 1A and 1B is provided with a single dowel grout zone 3 opposite to each other along the extension direction of the horizontal top plate 1.2 thereof (herein, perpendicular to the plane of the paper), wherein the single dowel grout zone 3 is adapted to be prefabricated in the factory with a consistent size and dimension of a stepped recess, such as a rectangular recess, wherein the size and dimension of the recess can also be determined according to the above-mentioned overlap length between the connectors 1.3 and the prefabrication process requirements, wherein the overlap length can be determined, for example, with reference to the concrete structure design specifications of the construction site. With Figures 2 to 11 In contrast to the embodiment shown in Fig. 1, it is easier and less costly to prefabricate the single dowel grout zone 3 in the precast concrete modules 1A and 1B. Further, in the case of the single dowel grout zone 3, the size and relative position of the two in the direction parallel to the vertical concrete wall 1.1 are not strictly required to be accurately aligned, as long as the overlap length between the connectors 1.3 and the additional connectors 4 in the dowel grout zone 3 can meet the requirements of the structure design specifications of the construction site. Since Figure 12 and 13 The connection principle and construction method of the shown embodiment are substantially the same as the embodiment shown in Fig. 1, which will not be described here again. Figure 2 and 11 The connection principle and construction method of the shown embodiment are substantially the same as the embodiment shown in Fig. 1, which will not be described here again.

[0056] For the purposes of the present disclosure, and unless otherwise specified, "a" means "one or more". In terms of the language used in the specification and claims, the term "comprising" or "comprises" will be used in a non- exhaustive sense, that is, it will be interpreted to mean "including but not limited to", in a similar manner as the term "containing" is interpreted in the field of patent law. Also, in terms of the language used in the specification and claims, the term "or" is used in its inclusive sense (i.e., "and / or"), that is, it will be interpreted to mean "one or the other, or both". When the applicant intends for "only A or B but not both" to be the intended meaning, the applicant will employ the phrase "only A or B but not both". Thus, the use of the term "or" is an inclusive and not an exclusive use. Also, in terms of the language used in the specification and claims, the terms "in" and "into" are intended to have additional meanings "on" or "onto" as well. "About" as used herein will be understood by one of ordinary skill in the art and will vary to some degree depending upon the context in which it is used. If the term "about" is used in reference to a particular term, it will mean that the particular term is at most 10% greater or less than the particular term. "Approximately" as used herein will be understood by one of ordinary skill in the art and will vary to some degree depending upon the context in which it is used. If the term "approximately" is used in reference to a particular term, it will mean that the particular term is at most 10% greater or less than the particular term.

[0057] The exemplary system and method of the present application have been specifically illustrated and described hereinabove with the intention of being merely exemplary thereof and not limiting thereof. It will be understood by those skilled in the art that various changes in the embodiments of the system and method described herein can be made without departing from the spirit and scope of the application as defined in the appended claims. The appended claims are intended to cover the system and method as broadly as possible, and therefore, the specification is to be construed in such a manner to encompass all possible embodiments. The above description of the system and method should therefore be understood to include all novel and non-obvious elements of the description as recited in the following claims, which are incorporated by reference herein. Moreover, no single feature or element of the above-described embodiments is essential to the system and method as claimed in this application or in subsequent applications.

Claims

1. A multi-storey and high-rise concrete modular combined building (1) comprising a plurality of prefabricated concrete modules, characterized in that , comprising: a first prefabricated concrete module (1A), wherein at least a part of the module is load-bearing, and the first prefabricated concrete module comprises at least two vertical concrete walls (1.1) and a horizontal bottom plate and a first horizontal top plate (1.2) arranged perpendicularly to the vertical concrete walls (1.1), wherein the first horizontal top plate (1.2) is provided with at least one first sunken grouting area (3) adjacent to the vertical concrete walls (1.1) and provided with a first connecting element (1.3); a second prefabricated concrete module (1B), wherein at least a part of the module is load-bearing, and the second prefabricated concrete module comprises at least two vertical concrete walls (1.1) and a horizontal bottom plate and a second horizontal top plate (1.2) arranged perpendicularly to the vertical concrete walls (1.1), wherein the second horizontal top plate (1.2) is provided with at least one second sunken grouting area (3) adjacent to the vertical concrete walls (1.1) and provided with a second connecting element (1.3); wherein the first prefabricated concrete module (1A) and the second prefabricated concrete module (1B) are arranged adjacent to each other in a single layer of the multi-storey and high-rise concrete modular combined building (1) to form a pouring space between the vertical concrete walls (1.1) of the first prefabricated concrete module (1A) and the vertical concrete walls (1.1) of the second prefabricated concrete module (1B) to allow pouring of concrete and forming a composite wall, wherein the first sunken grouting area (3) and the second sunken grouting area (3) can be arranged on both sides of the composite wall in pairs and allow the first connecting element (1.3) and the second connecting element (1.3) to be positioned in pairs and spaced apart from each other; further comprising an additional overlapping element (4) arranged in the first sunken grouting area (3) and the second sunken grouting area (3) arranged in pairs, wherein the additional overlapping element (4) is indirectly overlapped with the first connecting element (1.3) and the second connecting element (1.3) arranged in pairs and staggered with each other, and forms a horizontal connecting structure capable of bearing lateral load by means of the concrete poured into the first sunken grouting area (3) and the second sunken grouting area (3); wherein the first prefabricated concrete module (1A) and the second prefabricated concrete module (1B) are each spaced apart by a same number of first sunken grouting areas (3) and second sunken grouting areas (3) arranged in pairs in the extension direction of the horizontal top plate (1.2) thereof, thereby forming a plurality of distributed horizontal connecting structures between the first prefabricated concrete module (1A) and the second prefabricated concrete module (1B); wherein the pouring space formed between the vertical concrete walls (1.1) of the first prefabricated concrete module (1A) and the vertical concrete walls (1.1) of the second prefabricated concrete module (1B) has a width in the horizontal direction of generally not more than 20 mm.

2. The multi-storey and high-rise concrete modular composite building (1) according to claim 1, characterized in that , the first precast concrete module (1A) and the second precast concrete module (1B) are each provided with a first and a second sinking grout area (3) opposite to each other along the extension direction of the horizontal top plate (1.2) of the precast concrete module, so as to form a single centrally arranged horizontal connection structure between the first precast concrete module (1A) and the second precast concrete module (1B).

3. The multi-storey and high-rise concrete modular integrated building (1) as claimed in claim 1, wherein, wherein the first and second connection members (1.3) are steel bars each pre-anchored in the first and second sinking grout area (3), wherein the steel bars do not extend beyond the first and second sinking grout area (3).

4. The multi-storey and high-rise concrete modular integrated building (1) as claimed in claim 1, wherein, The additional lapping member (4) is arranged centrally with respect to the composite wall, so that the connection length of the additional lapping member (4) and the first and second connection members (1.3) in horizontal direction is substantially the same.

5. The multi-storey and high-rise concrete modular integrated building (1) according to claim 4, characterized in that, The additional lapping member (4) is arranged at a level with the bottom surface of the first and second sinking grout area (3) and the top surface of the composite wall.

6. The multi-storey and high-rise concrete modular integrated building (1) as claimed in claim 1, wherein, wherein the first and / or second sinking grout area (3) is designed as a rectangular notch precast at the edge of the horizontal top plate (1.2) in a stepped manner.

7. The multi-storey and high-rise concrete modular integrated building (1) as claimed in claim 1, wherein, wherein the first and / or second precast concrete module (1A, 1B) is designed as a structural concrete module capable of bearing shear forces and gravity or as a non-structural concrete module capable of bearing only gravity.

8. A method for constructing a multi-storey and high-rise concrete modular composite building (1) according to any one of claims 1 to 7, characterized in that, The construction steps are as follows: Step A, providing a plurality of precast concrete modules, wherein each of the precast concrete modules comprises at least two vertical concrete walls (1.1) and a horizontal bottom plate and a horizontal top plate (1.2) arranged perpendicularly to the vertical concrete walls (1.1), wherein at least one sinking grout area (3) is precast on the horizontal top plate (1.2) of the precast concrete module, wherein a connection member (1.3) is pre-provided in the sinking grout area (3); Step B, vertically hoisting one concrete module into position at the base layer or the transfer layer of the multi-storey and high-rise concrete modular combined building (1), and then hoisting another concrete module into position adjacent to the already hoisted concrete module to form a pouring space between the vertical concrete walls (1.1) of the two concrete modules, wherein the horizontal top plates (1.2) of the two concrete modules are flush; Step C, sealing both sides of the pouring space to form a formwork for the in-situ operation, and then pouring in-situ grouting material until an intermediate in-situ grouting layer (2) is formed, wherein the top surface of the intermediate in-situ grouting layer (2) is substantially flush with the bottom surface of the sinking grout area (3), and the intermediate in-situ grouting layer (2) together with the adjacent vertical concrete walls (1.1) forms a composite wall; Step D, arranging an additional lapping member (4) in the sinking grout area (3) so that it is indirectly lapped with the connection member (1.3) in a staggered manner; Step E, pouring in-situ grouting material into the sinking grout area (3) provided with the additional lapping member (4) until the top surface of the sinking grout area (3) is substantially flush with the horizontal top plate (1.2).

9. The method of claim 8, wherein, In step C, the sealed pouring space is provided with a grouting hole and a grout outlet hole located outside the precast concrete module, wherein the grouting hole is designed for top-down grouting and the grout outlet hole is designed for bottom-up grouting.

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