CN116084591A

CN116084591A - Horizontal connection structure of multi-layer and high-layer concrete modularized combined building and construction method

Info

Publication number: CN116084591A
Application number: CN202211381558.XA
Authority: CN
Inventors: 潘巍; 王震; 张扬; 张志乾
Original assignee: University of Hong Kong HKU
Current assignee: University of Hong Kong HKU
Priority date: 2021-11-08
Filing date: 2022-11-03
Publication date: 2023-05-09

Abstract

The invention provides a multi-story and high-rise concrete modular composite building (1) comprising a plurality of precast concrete modules, wherein the building comprises: a plurality of precast concrete modules, wherein the plurality of precast concrete modules are arranged in alignment adjacent to each other within a single layer of the multi-layer and high-rise concrete modular composite building (1) to form a casting space between the vertical concrete walls (1.1) allowing concrete to be cast in and forming a composite wall, wherein the submerged grouting areas (3) are arranged in pairs on both sides of the composite wall and allowing the connectors (1.3) to be arranged in pairs at intervals from each other; further comprises additional bridging members (4) arranged in the submerged grouting area (3) to indirectly bridge the paired connecting members (1.3) in an interlaced manner, and forms a horizontal connecting structure capable of bearing side load by means of concrete poured into the submerged grouting area (3). Also relates to a method for constructing the multi-story and high-rise concrete modular building (1).

Description

Horizontal connection structure of multi-layer and high-layer concrete modularized combined building and construction method

Technical Field

The invention relates to the field of advanced construction of assembled concrete buildings. In particular, it relates to a horizontal connection between three-dimensional box-type precast concrete modules for constructing a multi-story and high-rise concrete modular composite structure and a construction method thereof, so as to improve lateral force resistance and construction efficiency of the multi-story and high-rise concrete modular composite structure.

Background

Modular construction techniques are considered to be the fabricated construction technique with the highest level of prefabrication. Unlike conventional one-dimensional prefabricated components (e.g., beams, columns) or two-dimensional prefabricated components (e.g., walls, panels), the modular construction technique uses pre-finished three-dimensional box modules as basic prefabricated units, and forms modular composite buildings with different use functions by on-site assembly and synthesis. The building is built by adopting the modularized building technology, the working procedures of module production, interior decoration and the like can be transferred to a factory for carrying out, the on-site construction operation is reduced to the greatest extent, the on-site construction quality is improved, the on-site construction time can be shortened, the labor force and natural resources are saved, the influence on the surrounding environment is reduced, the building is a green low-carbon energy-saving building mode, and the building meets the internal requirement of the current building industry development.

The modules that have been used at present can be classified into steel modules and concrete modules according to the main manufacturing materials. The steel module has the advantages of light hoisting weight, flexible arrangement of building space, mature steel structure prefabrication and assembly technology and the like, so that the steel module is applied more, but the steel module is mainly concentrated in public buildings such as hotels, apartments, dormitories and the like due to the defects of fire resistance, sound insulation, cost and the like. Concrete modules are more accepted in private residential buildings, but related studies and applications are less. For multi-layer and high-rise concrete modular combined buildings, the vertical bearing capacity of the concrete modules is often not very problematic because the concrete modules have better self-bearing capacity under the action of simple vertical loads. However, under the side load effects of earthquakes, wind and the like, the multi-layer and high-layer concrete modularized combined building needs to be connected horizontally reliably so as to ensure that side force resisting components (such as a module wall and a core tube) in the same layer can jointly play a role, so that the whole concrete module building has enough side force resistance.

The horizontal connection and the method for obtaining enough lateral force resistance adopted by the existing concrete modular combined building mainly comprise two steps, namely, casting a reinforced concrete cast-in-situ layer on the top surface of a concrete module in situ, and forming a superposed floor slab with a module top plate in the concrete module so as to meet the requirement of horizontal lateral force transmission between different lateral force resistance components. The method for arranging the reinforced concrete cast-in-situ layer has the advantages of large field wet workload, labor and effort, weakening the advantages of the modularized construction technology and being unfavorable for popularization and application of the concrete modularized combined building.

The other method is to arrange wider pore canal in the middle of the adjacent concrete module wall or to arrange wider pore canal in the middle of the adjacent concrete module wall, add exposed mechanical connecting components such as channel steel, steel bar truss and the like in the pore canal and the large pore canal, and then perform site grouting operation to form a laminated wall body to transfer the side force of the structure. Although the method does not need to carry out large-operation grouting of the cast-in-situ concrete layer, the thickness of the formed laminated wall is larger and often exceeds 250 mm. When the method is used for building projects with more rooms, the use area of floors can be obviously reduced due to excessive overlapped walls, wherein preset connecting members which are arranged in an exposed mode can influence the transportation, hoisting and installation of modules, the overall construction efficiency can be influenced, project benefits of builders can be greatly influenced, and the enthusiasm of the builders for adopting a modularized construction method can be weakened. And a plurality of exposed mechanical connecting members are embedded in the adjacent concrete module walls, so that the manufacturing cost and the manufacturing period of the concrete module can be increased, and the popularization and the application of the concrete module building are not facilitated. Further, in order to improve the strength in the above-mentioned laminated wall body and the integrity of the laminated wall, fasteners such as reinforcing bars are overlapped between the exposed mechanical connection members. The lap joint requires a great deal of manual work on site to bend, insert and lap the reinforcing bars, and because the mechanical connecting members to be fastened are positioned in the gaps between adjacent concrete module walls, which are difficult for workers to access, the construction difficulty is high, the construction efficiency is low and the construction effect is difficult to ensure.

Thus, multi-story and high-rise concrete modular composite construction is faced with an urgent need for improved horizontal connection between precast concrete modules and methods of construction thereof.

Disclosure of Invention

It is therefore an object of the present invention to provide an improved horizontal connection for modular multi-story and high-rise concrete composite structures and a method of constructing the same, solving the above-mentioned problems.

According to one aspect of the present invention, there is provided a multi-story and high-rise concrete modular composite building comprising a plurality of precast concrete modules comprising: a first precast concrete module, wherein at least a portion of the module is load bearing and the first precast module comprises at least two vertical concrete walls and a horizontal floor and a first horizontal roof arranged perpendicular to the vertical concrete walls, wherein the first horizontal roof has at least one first submerged grouting area provided adjacent to the vertical concrete walls, pre-set with first connectors; a second precast concrete module, wherein at least a portion of the module is load bearing and the second precast module comprises at least two vertical concrete walls and a horizontal floor and a second horizontal roof arranged perpendicular to the vertical concrete walls, wherein the second horizontal roof has at least one second submerged grouting area provided adjacent to the vertical concrete walls, pre-provided with a second connection; wherein the first precast concrete module and the second precast concrete module are arranged in alignment adjacent to each other within a single layer of the multi-layer and high-rise concrete modular composite building to form a casting space between a vertical concrete wall of the first precast concrete module and a vertical concrete wall of the second precast concrete module that allows concrete to be cast in and forms a composite wall, wherein the first submerged grouting area and the second submerged grouting area can be arranged in pairs on both sides of the composite wall and allow the first connector and the second connector to be positioned in pairs spaced apart from each other; and an additional bridge member provided in the first and second submerged grouting areas arranged in pairs, wherein the additional bridge member indirectly overlaps the pairs of the first and second coupling members in an interlaced manner with each other, and forms a horizontal coupling structure capable of bearing a side load by means of concrete poured into the first and second submerged grouting areas.

Thus, according to the invention, the horizontal top plates of two adjacent precast concrete modules are provided with sinking grouting areas and connecting pieces are reserved; the on-site additional lap joint piece is utilized to carry out staggered indirect lap joint connection with the connecting piece of the horizontal top plate, and the sinking grouting area is filled with high-performance grouting material, so that the horizontal connecting structure is novel. And the gaps of the module walls in two adjacent concrete modules are filled with high-performance grouting materials to form an intermediate cast-in-situ grouting layer, so that the high-performance grouting materials and the above horizontal connecting structures are allowed to form a synergistic effect to transfer and resist lateral loads applied to the construction of the precast concrete modules. According to the invention, the construction efficiency of the precast concrete module building can be improved, the field construction workload and the number of required templates are reduced, the thickness of a composite wall formed among the modules is reduced, and the bearing capacity of the connection among the modules can be improved by optimizing construction measures and a common concrete member surface treatment method, so that the structural integrity, lateral force resistance and construction efficiency of the whole concrete module building are improved.

As a preferred aspect of the present invention, wherein the first precast concrete module and the second precast concrete module are each provided with the same number of the first submerged grouting areas and the second submerged grouting areas, which are opposite in position, at intervals along the extending direction of the horizontal top plate thereof, thereby forming a plurality of distributed horizontal connection structures between the first precast concrete module and the second precast concrete module. Thus, the distributed horizontal connection structure can be formed in a manner that facilitates field worker operations, which contributes to an improvement in efficiency of field operations.

As a preferred aspect of the present invention, wherein the first precast concrete module and the second precast concrete module are each provided with a first submerged grouting area and a second submerged grouting area opposite to each other along an extension direction of the horizontal roof thereof, thereby forming a single centrally arranged horizontal connection structure between the first precast concrete module and the second precast concrete module. Thereby, it is facilitated to form the submerged grouting area in the precast concrete module in a simple and low cost manner.

As a preferred aspect of the present invention, wherein the first and second connection members are reinforcing bars pre-anchored to the first and second submerged grouting areas, respectively, wherein the reinforcing bars do not extend beyond the first and second submerged grouting areas. This aspect thus allows avoiding the adverse effects of interference or even collision between adjacent modules at the time of hoisting when assembling precast concrete modules, thereby contributing to an improvement in the installation efficiency on site. On the other hand, the precast concrete has a higher degree of prefabrication and a larger specific gravity of the volume of precast concrete in the total volume of the floor slab than the prior art, which is very advantageous for reducing the cost of the components and realizing standardized production.

As a preferred aspect of the present invention, wherein the additional joint is centrally disposed with respect to the composite wall such that the connection length thereof in the horizontal direction is substantially the same as the connection length of the first and second connectors. The length of the additional lap joint can be determined according to the local rebar anchor length design specification. Thereby allowing workers to make inter-lapping in a reliable manner and helping to increase the strength of the distributed horizontal connection.

As a preferred aspect of the present invention, wherein the additional landing member is located at a position substantially flush with the bottom surfaces of the first and second submerged grouting areas and the top surface of the composite wall. Thereby, the worker is allowed to perform the inter-lapping work in an easy-to-access manner, thereby improving the efficiency of the field work.

As a preferred aspect of the present invention, the first and/or second submerged grouting areas are designed as stepped rectangular notches pre-made at the edges of the horizontal top plate, and the size of the first and/or second submerged grouting areas is determined according to local design specifications and module stress calculation analysis results. Thus, it is allowed to prefabricate a subsidence grouting area suitable for modular combination buildings of different areas and different heights in a factory, thereby reducing the workload of field operation.

As a preferred aspect of the present invention, wherein a width of the casting space formed between the vertical concrete wall of the first precast concrete module and the vertical concrete wall of the second precast concrete module in the horizontal direction is generally not more than 20 mm. Thus, the multi-layer and high-rise concrete modular composite building according to the present invention is allowed to have a cost-effective yield (use area/building area), thereby significantly improving the project profits of the builders.

As a preferred aspect of the invention, the first precast concrete module and/or the second precast concrete module are designed as structural concrete modules capable of bearing shear forces and gravity forces or as non-structural concrete modules capable of bearing gravity forces only. Thus, the invention is more flexibly applicable to the construction of multi-layer and high-layer concrete modular combined buildings, and facilitates the standardized production of precast concrete modules in factories, and only the precast concrete modules need to be accurately installed in the field at the later stage, which is beneficial to improving the manufacturing and construction efficiency.

According to another aspect of the present invention, there is also provided a method for constructing a multi-story and high-rise concrete modular combined building using the horizontal joint according to the present invention, characterized by the following construction steps: step A, providing a plurality of precast concrete modules, wherein the precast concrete modules comprise at least two vertical concrete walls, a horizontal bottom plate and a horizontal top plate which are perpendicular to the vertical concrete walls, at least one sinking grouting area is precast on the horizontal top plate of the precast concrete modules, and connecting pieces are preset in the sinking grouting area; step B, vertically hoisting one concrete module into position on a foundation layer or a conversion layer of the multi-layer and high-layer concrete modular combined building, and then positioning the other concrete module adjacent to the positioned concrete module to form a casting space allowing casting grouting materials and forming a composite wall between the two vertical concrete walls, wherein horizontal top plates of the two concrete modules are flush; step C, plugging two sides of the casting space to form a template for cast-in-situ operation, and then casting grouting materials in situ until an intermediate cast-in-situ grouting layer with the top surface approximately flush with the bottom surface of the sinking grouting area is formed, wherein the intermediate cast-in-situ grouting layer and the adjacent vertical concrete wall form a composite wall together; step D, arranging an additional lap joint member in the sinking grouting area so as to be in staggered indirect lap joint with the connecting member; and E, pouring grouting material into the sinking grouting area provided with the additional lap joint part in situ until the top surface of the sinking grouting area is flush with the horizontal top plate.

Additional features and advantages of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following, or may be learned from practice of the invention.

Drawings

Embodiments of the present invention are described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic illustration of a multi-story and high-rise concrete modular composite construction site construction hoist concrete module according to the present invention;

FIGS. 2-11 are schematic views of an embodiment of a horizontal connection structure of a concrete module according to the present invention, in which a distributed horizontal connection structure is formed, wherein FIG. 2 is a side view of the concrete module of the present invention, in which a submerged grouting area and a connection located therein are clearly illustrated;

FIG. 3 is an enlarged partial cross-sectional view of the horizontal coupling structure of the concrete module of the present invention, in which the submerged grouting area and the coupling and additional landing member located therein are clearly illustrated;

fig. 4-11 are schematic views of the in-situ construction process and method of the horizontal joint structure of the concrete module of the present invention, in which the submerged grouting area and the joint and the additional landing member located therein are clearly shown. Fig. 4, 5, 8 and 10 are schematic views of the concrete module at different construction stages, fig. 6 is a cross-sectional view of the horizontal connection structure of the concrete module according to the present invention, and fig. 7, 9 and 11 are plan views of three typical steps of the on-site construction flow of the horizontal connection structure of the concrete module according to the present invention.

Fig. 12-13 are schematic and top views of another embodiment of the horizontal connection structure of a concrete module of the present invention, in which a centralized horizontal connection structure is formed, in which a submerged grouting area and a connection member located therein are clearly shown.

Reference numerals illustrate: 1A, 1B-concrete modules, 1.1-concrete walls (vertical), 1.2-horizontal top plates and 1.3-connectors; 2-a middle cast-in-situ grouting layer; 3-sinking the grouting area; 4-additional landing gear.

Detailed Description

Although the drawings are provided to present some embodiments of the invention, the drawings are not necessarily to scale and certain features may be exaggerated, removed, or sectioned to better illustrate and explain the present disclosure. The position of part of components in the drawings can be adjusted according to actual requirements on the premise of not affecting the technical effect. The appearances of the phrase "in the drawings" or similar language in the specification do not necessarily refer to all figures or examples.

The terms in all directions (e.g., upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above, below, vertical, lateral) are only used for identification purposes to aid the reader's understanding of the present invention, and do not create limitations, particularly as to the position, orientation, or use of the invention.

Furthermore, the terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

In fig. 1, a multi-story and high-rise concrete building such as a high-rise apartment building and an office building is illustrated, in which a modular construction technique is used for construction in order to accelerate the progress of construction and improve the quality of construction. In particular, the modular construction technique may be an assembly and synthesis building method, which makes prefabricated concrete modules 1 in factories and then assembles them into multi-story and high-rise concrete modular composite buildings on site. In general, the precast concrete modules 1 may form a unit in a building, such as an apartment, building, office, or a part of a room, and be formed together with plumbing, electrical wiring, built-in cabinets, etc. Although the concrete module 1 shown in fig. 1 is used to construct the upper floors of the entire modular building complex, those skilled in the art will recognize that it is also possible to construct the concrete module 1 on a first floor above a foundation or conversion floor.

As shown in fig. 1, the precast concrete module 1 may include four vertical walls, one ceiling and a floor at most; alternatively, it is also possible to have fewer than four walls and only a ceiling or floor, while the third and/or fourth wall and the ceiling or floor are provided by adjacent modules. As shown in fig. 1, wherein precast concrete modules 1 may be hoisted into place by a crane and connected together into an integrated structure.

Since multi-story and high-rise buildings are strongly affected by extreme conditions such as strong winds (typhoons, hurricanes) or earthquakes, it is very necessary to improve the lateral resistance or horizontal connection strength between adjacent precast concrete modules. To this end, the present invention provides a distributed or centralized horizontal connection structure that can be used to increase the lateral force resistance of multi-and high-rise concrete modular composite buildings, disposed between adjacent precast concrete modules. The invention also relates to a method of constructing a multi-and high-rise concrete modular composite building comprising such novel horizontal connection structure. For this reason, embodiments of the present invention are described in more detail below in connection with fig. 1 to 13. Wherein in fig. 2 to 11 a distributed horizontal connection is shown arranged between adjacent precast concrete modules and in fig. 12 to 13 a centralized horizontal connection is shown between adjacent precast concrete modules.

Referring to the drawings, a first precast concrete module 1A and a second precast concrete module 1B according to the present invention are depicted in fig. 2, which are hoisted or installed to be placed adjacent to each other. In this embodiment, the first precast concrete module 1A comprises a first vertical concrete wall and a second vertical concrete wall 1.1 with a horizontal bottom plate and a first horizontal top plate 1.2 connected to the first vertical concrete wall and the second vertical concrete wall and arranged perpendicular to the vertical concrete walls. Thereby, the first precast concrete module 1A can define an inner space having a substantially cubic shape. Likewise, the second precast concrete module 1B comprises a first vertical concrete wall and a second vertical concrete wall 1.1 with a horizontal bottom plate and a second horizontal top plate 1.2 connected to the first vertical concrete wall and the second vertical concrete wall 1.1 and arranged perpendicular to the vertical concrete walls. However, the term "wall" as used in this application also includes planar walls, support columns, or portions of walls. In short, any support member that can be connected to a floor or ceiling together with additional wall members can be formed into a module according to the present invention.

Here, each precast

concrete module

1A and 1B optionally comprises a carrier capable of bearing vertical loads, so that the module can be used for constructing multi-storey and high rise buildings, such as the building shown in fig. 1. The carrier may be one of a vertical wall or a support column. When prefabricated modules are used to form a housing unit, various attachments may be incorporated therein, like windows, pipes, wires, built-in units such as kitchen cabinets, floors, heating ventilation air conditioning etc. By constructing the various in-module attachments in a factory environment, factory testing can be performed to ensure that all components are properly used before being sent to a construction site for assembly, which helps to improve the efficiency of module production and construction. Alternatively, the prefabricated module may be a housing, interior decoration, or the like, which is completed after the multi-story or high-rise building is assembled and completed, and the like is delivered to the customer.

Further, as shown in fig. 2, the first horizontal top plate 1.2 of the first precast concrete module 1A is provided with at least one first submerged grouting area 3 provided adjacent to the vertical concrete wall body, where the first connectors 1.3 are preset. Here, the first submerged grouting area 3 can be adapted to be prefabricated in a factory in a shape like a stepped rectangular indentation dug out at the edge of the horizontal roof plate 1.2. As described below, the oblong gap will be filled and poured with cast-in-place concrete in the field during the method of constructing a multi-story and high-rise concrete modular composite building. It should be noted that designing the indentations as rectangles is only an example, and those skilled in the art will appreciate that other shapes, such as squares, are possible. The size of the gap in the submerged grouting area can be determined according to the overlap length between connecting pieces and prefabrication process requirements, wherein the overlap length can be determined by referring to the concrete structure design specification of the construction site.

In order to ensure a reliable horizontal connection, a plurality of grout-sinking areas 3, in this case 3 grout-sinking areas 3 as an example, are distributed at intervals in the direction of extension of the horizontal roof 1.2 (in this case perpendicular to the plane of the paper) of the first precast concrete module 1A, 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, it will be appreciated by those skilled in the art that it is possible to provide more submerged grouting areas distributed along the extension direction, depending on the desired strength of the connection and the size of the module.

Further, as is more clearly illustrated in fig. 3-5, a plurality of first connectors 1.3, such as steel bars, are pre-anchored in each of the submerged grouting areas 3 of the first precast concrete modules 1A, wherein the first connectors 1.3 may be anchored in the concrete when the concrete modules 1A are precast, which helps to simplify the manufacturing costs and the processing cycle of the concrete modules. At the same time, these first connectors 1.3 do not extend beyond the submerged grouting area 3 in which they are housed, in other words, there are no exposed or extended connectors, such as steel bars, around the prefabricated part of the precast concrete module 1A according to the present invention, which allows avoiding the adverse effects of interference or even collision between adjacent modules at the time of hoisting when assembling the precast concrete module 1A, thus contributing to an improvement in the installation efficiency on site. Also, as is apparent from the above description, the precast concrete module 1A according to the present invention is provided with connectors only on the top horizontal ceiling 1.2, and has a higher degree of prefabrication and a larger specific gravity of the volume of precast concrete in the total volume of the floor slab than the existing method of adding a large number of mechanical connection members in the concrete wall 1.1, which is very advantageous in reducing the construction cost of the members and realizing standardized production.

Further, as can be seen in connection with fig. 2-5, the second precast concrete module 1B illustrated herein has substantially the same structure as the first precast concrete module 1A. This is more conducive to standardized production of precast concrete modules in factories, and the precast concrete modules need only be precisely installed in the field at a later stage, which is conducive to improvement in manufacturing and construction efficiency.

In order to effectively connect the first precast concrete module 1A and the second precast concrete module 1B to transfer and resist side loads received in the concrete module building, as can be seen from fig. 2 to 3, the first precast concrete module 1A and the second precast concrete module 1B are arranged adjacent to each other in a single layer of the multi-layer and high-rise concrete modular combined building to form a casting space between the vertical concrete walls 1.1 of the first precast concrete module 1A and the vertical concrete walls 1.1 of the second precast concrete module 1B, which allows casting concrete and forms a composite wall described in detail below, and herein, as can be seen from fig. 5 to 6, is defined by a gap between the vertical concrete walls 1.1 of the first precast concrete module 1A and the vertical concrete walls 1.1 of the second precast concrete module 1B, which, after plugging both sides of the gap (both sides perpendicular to the paper surface direction), will be used as a casting template in a subsequent casting operation to form an intermediate layer 2 described in detail below. Due to the fact that the formwork in the later cast-in-situ grouting layer construction is formed by means 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, construction efficiency is improved, and the new direction of industry development of green circulation low carbon is met.

It can be seen that the intermediate cast-in-situ grouting layer 2 forms a composite wall body with a certain lateral force resistance through the bonding action between grouting materials and the exposed aggregate interfaces of the vertical concrete wall body 1.1 of the first precast concrete module 1A and the vertical concrete wall body 1.1 of the second precast concrete module 1B. By performing surface treatments such as hydraulic flushing when manufacturing the vertical concrete walls 1.1 of the first precast concrete module 1A and the vertical concrete walls 1.1 of the second precast concrete module 1B in a factory, the roughness of the vertical concrete walls 1.1 can be significantly improved to obtain a stronger bonding effect with the intermediate cast-in-place grouting layer 2. Due to the fact that the lateral resistance is cooperatively achieved by the horizontal connection structure formed by the composite wall and the submerged grouting area of the module horizontal roof as described below and without the need of adding mechanical connection members in the vertical concrete wall, the width of the casting space in the horizontal direction (i.e., the thickness of the middle cast-in-place grouting layer 2) according to the present invention can be designed to be generally 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-layer and high-rise concrete modular composite building according to the present invention to have a cost-effective yield (use area/building area), thereby significantly improving the project profits of builders.

Here, referring to fig. 6, it can be seen that the top surface of the intermediate cast-in-place grout layer 2 is cast-in-place to a height substantially flush with the bottom surfaces of the submerged grout zones 3 of the first and second precast

concrete modules

1A and 1B, thereby allowing an additional bridge piece 4, here, such as a rebar, to be placed on the top surface of the intermediate cast-in-place grout layer 2 and substantially flush with the bottom surfaces of the submerged grout zones 3 of the first and second precast

concrete modules

1A and 1B, which allows the additional bridge piece 4 to be indirectly overlapped at substantially the same height as the pre-anchored connection piece 1.3 within the submerged grout zone 3. This allows a worker to easily access the submerged grouting area 3 and place the additional lap joint 4 as prescribed due to the fact that the area is located on a horizontal roof.

As is clear from fig. 3 and 8 to 9, the additional bridge pieces 4, here exemplified by four reinforcing bars, are arranged centrally with respect to the composite wall (middle cast-in-place grout layer 2), wherein these additional bridge pieces 4 indirectly overlap with the first and second connecting pieces belonging to the first and second precast

concrete modules

1A and 1B in a staggered manner with each other. Specifically, the additional bridge 4 for four reinforcing bars and the first and second coupling members 1.3 of the pre-anchored horizontal roof 1.2 for the same reinforcing bars are spaced apart from each other in the left-right direction in fig. 3 and 9, but the additional bridge 4 for four reinforcing bars and the first and second coupling members 1.3 of the pre-anchored horizontal roof 1.2 for the same reinforcing bars are overlapped with each other in the up-down direction in fig. 3 and 9, wherein the coupling length or the overlap length of the additional bridge 4 and the first and second coupling members 1.3 of the pre-anchored horizontal roof 1.2 is substantially the same, and the coupling length meets the reinforcing bar overlap design specification requirements of the place where the modular combination building is located. Due to the fact that non-tight indirect lap joint is adopted, the workload of field workers for bending or binding the reinforcing steel bars is greatly reduced, and accordingly field operation efficiency is remarkably improved. The site worker can place the additional bridge 4 of four bars as desired, simply by marking the positions in advance or by means of a simple gauge. It should be noted that although in fig. 3 the number of additional landing members 4 is the same as the first and second attachment members 1.3, this is not essential. Whether the number of additional landing members 4 or the length of their connection to other attachment members can be determined according to site requirements or existing concrete structural design specifications. It should be noted that the number of the four sets of the first connecting member, the second connecting member and the additional bridging member 4 in the present embodiment is only shown as an example to illustrate the connecting method and the construction steps of the present invention, and those skilled in the art should be aware of the influence of the size and the material properties of the concrete module, and it is possible to use more or less sets of the first connecting member, the second connecting member and the additional bridging member 4, so long as the requirements of the structural design specification can be met and the connection and the structural safety can be ensured, which will not be repeated herein.

Besides remarkably reducing the workload of field operation, the adoption of the staggered indirect lap joint is also beneficial to diffusing the stress born by the reinforcing steel bars and the like, so that the ultimate bearing capacity of the reinforcing steel bars can be improved.

Finally, referring to fig. 10 and 11, after the additional bridge 4 has been placed and indirectly overlapped with the connection member 1.3 in an interlaced manner, in-situ grouting work is performed in the 3 subsidence grouting areas 3 arranged at intervals to form a distributed horizontal connection structure. That is, the grouting material is cast in place into the submerged grouting area 3 provided with the additional bridge 4 until the top surface of the submerged grouting area is substantially flush with the horizontal roof 1.2 and a distributed horizontal connection structure capable of bearing side loads is formed by means of the concrete poured into the submerged grouting area 3. As a result, a plurality of horizontally connected structures are formed between the first precast concrete module 1A and the second precast concrete module 1B in a distributed arrangement, thereby completing the connection of two adjacent precast

concrete modules

1A and 1B between one layer of the multi-layer and high-layer concrete modular composite structure. The above operations are sequentially and circularly carried out on the conversion layer, thereby constructing one layer of the multi-layer and high-layer concrete modularized combined building. And then carrying out the operation of the upper layer on the basis of the completed layer, and finally completing the whole construction work of the multi-layer and high-layer concrete modular combined building. Compared with the existing method that the top surfaces of the precast concrete modules are required to be fully poured to form the composite floor slab, the method has the advantages that the field wet work load is obviously reduced, the floor height is reduced, and the cost can be obviously reduced.

As is apparent from the above description, the multi-and high-rise concrete modular composite construction according to the present invention can transmit and resist lateral loads applied to a concrete module construction by not only the composite wall formed by two adjacent vertical concrete walls 1.1 and the middle cast-in-place grouting layer 2, but also the cooperation of the composite wall and the distributed horizontal connection structure formed by a plurality of submerged grouting areas of the horizontal roof panel, when being subjected to external influences such as typhoons or earthquakes. The invention utilizes the distributed horizontal connection formed by the cast-in-situ sinking grouting areas 3 in the horizontal top plates of the

concrete modules

1A and 1B and the combined action of the vertical walls of the adjacent modules and the composite wall formed by the middle cast-in-situ grouting layer, thus forming a novel horizontal force transmission mechanism between the concrete modules, fully utilizing different components in the concrete modules to transmit force, and reducing the design requirements on the strength and thickness of the composite wall when the force is transmitted by the composite wall alone. According to the invention, the mechanical connecting members are not required to be arranged in the composite wall body by adopting pore channels or wider gaps among the module walls, and the thickness of the composite wall body formed among the precast concrete modules can be obviously reduced on the premise of ensuring enough lateral force resistance.

Further, since the concrete module with the distributed horizontal connection structure according to the present invention has excellent lateral force resistance, the concrete module of the present invention is not only applicable to structural type concrete modules capable of bearing shearing force and gravity. It is possible to select one or both of the first precast concrete modules 1A and the second precast concrete modules 1B in the present invention as an unstructured concrete module capable of withstanding only gravity, as needed.

Next, a construction method for constructing the above multi-story and high-rise concrete modular combination building according to the present invention will be described hereinafter, in which the construction steps are as follows:

step a, see fig. 2, a plurality of precast

concrete modules

1A and 1B are provided, wherein each of these 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 perpendicular to the vertical concrete walls 1.1, wherein at least one submerged grouting area 3 (as an example, three submerged grouting areas 3 in fig. 2) is precast on the horizontal top plate 1.2 of the precast concrete module, wherein connectors 1.3 are preset at these submerged grouting areas 3.

Here, as previously described, a plurality of submerged grouting areas 3 preset on the horizontal top plates 1.2 of the precast

concrete modules

1A and 1B are reserved at the time of module production factory fabrication, and the connection members 1.3 such as reinforcing bars in the areas thereof are reserved. As previously mentioned, it is not intended herein to define the number, shape and size of the submerged grouting areas 3 for each precast

concrete module

1A or 1B, since they can be flexibly determined according to structural design or specifications. As a non-limiting example, the length of the submerged grouting area 3 along the extension direction of the joint 1.3 is generally required to satisfy the overlapping length of the joint 1.3 and the additional overlapping member 4 of 15d and 300 millimeters (mm) or more, and longer overlapping length is required to be provided when the joint 1.3 and the additional overlapping member 4 are pulled, generally about 30d or more, depending on the kind and strength of the high-performance grouting material filled in the submerged grouting area 3; the corresponding specification of the spacing between the connector 1.3 and the corresponding additional bridge 4 is to be satisfied in the direction perpendicular to the connector 1.3, such as a distance between each set of bars being d and 25mm or more (required by the design construction specification of the chinese land) or 2d and 20mm or more (required by the design construction specification of the chinese hong Kong special administrative district). In the above, d is the smaller of the diameters of the attachment piece 1.3 or the additional landing piece 4. When a novel high-performance grouting material or connecting piece 1.3 or an additional lap joint piece 1.4 is adopted, the determination can be carried out according to the result of a corresponding structural experiment.

Next, referring to fig. 4, in step B, a concrete module 1A is vertically hoisted into place at the base or upper level of the multi-and high-rise concrete modular combined building 1, wherein the edges of the vertical walls 1.1 of the precast concrete modules 1A can be aligned exactly with the edges of the pre-set middle grout region by means of pre-scoring or gauge. The other precast concrete module 1B is then lifted in a horizontal direction to the other side of the preset middle grout region and lowered in the direction of the arrow in fig. 4 to be arranged next to the concrete module 1A. The arrangement position of the lowered precast concrete module 1B relative to the concrete module 1A is corrected such that the edge of the vertical mold body of the precast concrete module 1B is exactly aligned with the edge of the preset middle grouting area, which positions the precast concrete module 1B adjacent to the concrete module 1A in place to form a casting space between the two vertical concrete walls 1.1 allowing casting of concrete and forming a composite wall, wherein the horizontal top plates 1.2 of the two are substantially flush, at which point the state of the precast concrete module 1A and the precast concrete module 1B in place can be seen in fig. 2.

Referring to fig. 5 to 7, in the subsequent step C, both sides of the casting space are blocked to form a mold for the cast-in-place operation. The cast-in-place operation is performed here by performing a grouting process from top to bottom until grouting is performed to the lower edge of the submerged grouting area 3 of the horizontal top plate 1.2 of the precast

concrete modules

1A and 1B. In order to realize top-down grouting, a grouting hole and a grout outlet are arranged at the outer side of the precast concrete module in the blocked casting space, wherein the grouting hole is designed to be grouting from top to bottom and the grout outlet is designed to be grout outlet from bottom to top. It is particularly preferable that the grout outlet holes are provided at high places with a distance from the grout holes to secure the compactness of the grout. Preferably, the above-mentioned grouting holes and grout outlets are provided outside the precast

concrete modules

1A and 1B, which reduces the influence on other integrated functions in the precast concrete module unit and improves the function and efficiency of the functional integration of the module unit, compared to the grouting holes and grout outlets provided inside the module unit. Preferably, a grouting groove of a through length is added and has a certain inclination, which also helps to improve grouting efficiency. The operation of casting in grouting material is continued until an intermediate cast-in-situ grouting layer 2 with the top surface approximately flush with the bottom surfaces of the plurality of submerged grouting areas 3 is formed, wherein the intermediate cast-in-situ grouting layer 2 and the adjacent vertical concrete wall form a composite wall body together. Here, the grouting material may be general concrete or high-performance concrete or Reactive Powder Concrete (RPC) and high-strength mortar. The grouting material is favorable for improving the bonding strength of an interface and has better self-compaction property.

Subsequently in step D, referring to fig. 8-9, a plurality of additional bridge pieces 4 are provided in the plurality of submerged grouting areas 3 located opposite to each other so as to be cross-lapped indirectly with the connecting pieces 1.3 in the plurality of submerged grouting areas 3, wherein it is easy and efficient for the field workers to perform the field cross-lapped indirect lap reinforcement connection operation since the intermediate cast-in-place grout layer 2 has already formed a composite wall having a height level with the submerged grouting areas together with the adjacent vertical concrete wall 1.1. Those skilled in the art will appreciate that the present invention is not intended to be limited to parameters such as the number, spacing, length of connection or diameter of rebar between the additional lap pieces 4 and the connectors 1.3 of rebar, as these parameters need to be arranged according to local regulatory requirements or based on experimental study results. As a non-limiting example, the diameter of the rebar commonly employed in the horizontal roof panels 1.2 of

concrete modules

1A or 1B may be 12 millimeters (mm), 16mm, 20mm, etc., with lap length and spacing parameters as previously described in step a. So long as the distance between the reinforcing bars and the connection length with the connection members such as the reinforcing bars in the two precast

concrete modules

1A and 1B are ensured so that the connection reinforcing bars sufficiently function and meet the local structural design specifications.

Finally in step E, see fig. 10-11, grouting material is cast in place into a plurality of spaced apart submerged grouting areas 3 provided with additional bridge pieces 4 until the top surfaces of these submerged grouting areas 3 are flush with the horizontal roof 1.2, thereby completing the entire construction process of forming a distributed horizontal connection structure between adjacent precast

concrete modules

1A and 1B. The grouting material can also be ordinary concrete or high-performance concrete or Reactive Powder Concrete (RPC) and high-strength mortar. The grouting material is favorable for improving the bonding strength of an interface and has better self-compaction property.

Further, another possible embodiment of the present invention is clearly shown in fig. 12-13. Since the present invention is not intended to limit the number and size of the submerged grouting areas 3, it is also possible to combine several submerged grouting areas 3 of smaller size into one submerged grouting area 3 of larger size, and thus to form a single centrally arranged horizontal connection structure therebetween, unlike the above-described horizontal connection structure in which a plurality of distributed arrangements are formed between the precast

concrete modules

1A and 1B.

Specifically, in the embodiment shown in fig. 12 and 13, in each of the precast

concrete modules

1A and 1B, a single submerged grouting area 3 is provided opposite to each other in the extending direction of the horizontal top plate 1.2 (here, perpendicular to the paper surface direction), wherein the single submerged grouting area 3 is adapted to be prefabricated in a factory with a stepped, e.g. rectangular, gap of uniform size and dimension, wherein the size of the gap can also be determined according to the overlap length between the connectors and the prefabrication process requirements described above, wherein the overlap length can be determined, for example, with reference to the concrete structural design specifications of the construction site. Unlike the embodiment shown in fig. 2 to 11, it is easier and less costly to prefabricate a single submerged grouting area 3 in precast

concrete modules

1A and 1B. Further, in the case of providing a single submerged grouting area 3, the dimensions and relative positions of the two in a direction parallel to the vertical concrete wall 1.1 do not strictly require precise alignment, as long as it is ensured that the overlap length between the connector 1.3 and the additional connector 4 in the submerged grouting area 3 can meet the structural design specification requirements of the construction site. Since the connection principle and construction method of the embodiment shown in fig. 12 and 13 are substantially the same as those of the embodiment shown in fig. 2 and 11, a detailed description thereof will be omitted.

For purposes of this disclosure and unless otherwise specifically stated, "a" means "one or more". As used in this specification and the claims, the terms "comprising" or "including" will be non-inclusive, somewhat like "comprising," in that those terms are interpreted when employed as transitional coupling words. Furthermore, to the extent that the term "or" is used (e.g., A or B), it will mean "A or B or both. When applicants intend to indicate "only a or B but not both", it will be used "only a or B but not both". Thus, the use of the term "or" is inclusive, and not exclusive. Also, to the extent that the term "in" or "within" is used in the specification or the claims, they are intended to have the additional meaning of "on" or "above". As used herein, "about" will be understood by those skilled in the art and will vary to some extent depending on the application in which it is used. If the use of this term is not clear to a person skilled in the art, "about" will mean at most plus or minus 10% for the particular term.

The exemplary systems and methods of the present invention have been particularly shown and described with reference to the foregoing embodiments, which are merely examples of the best modes for carrying out the systems and methods. It will be appreciated by those skilled in the art that various changes may be made to the embodiments of the systems and methods described herein in practicing the systems and/or methods without departing from the spirit and scope of the invention as defined in the following claims. The following claims are intended to define the scope of the systems and methods and systems and methods within the scope of these claims and their equivalents are contemplated. The above description of the present system and method should be understood to include all novel and non-obvious combinations of elements described herein, and claims may be presented in this or a later application to any novel and non-obvious combination of elements. Furthermore, the embodiments described above are exemplary, and no single feature or element is essential to all possible combinations that may be claimed in this or a later application.

Claims

1. A multi-story and high-rise concrete modular composite building (1) comprising a plurality of precast concrete modules, comprising:

A first precast concrete module (1A), wherein at least a part of the module is load bearing and the first precast concrete module comprises at least two vertical concrete walls (1.1) and a horizontal floor and a first horizontal roof (1.2) arranged perpendicular to the vertical concrete walls (1.1), wherein the first horizontal roof (1.2) is provided with at least one first submerged grouting zone (3) arranged adjacent to the vertical concrete walls (1.1) pre-provided with first connectors (1.3);

a second precast concrete module (1B), wherein at least a portion of the module is load bearing and the second precast concrete module comprises at least two vertical concrete walls (1.1) and a horizontal floor and a second horizontal roof (1.2) arranged perpendicular to the vertical concrete walls (1.1), wherein the second horizontal roof (1.2) is provided with at least one second submerged grouting zone (3) arranged adjacent to the vertical concrete walls (1.1) pre-provided with second connectors (1.3);

wherein the first precast concrete module (1A) and the second precast concrete module (1B) are arranged adjacently to each other in a single layer of the multi-and high-rise concrete modular combined building (1) to form a casting space between a vertical concrete wall (1.1) of the first precast concrete module (1A) and a vertical concrete wall (1.1) of the second precast concrete module (1B) allowing casting concrete and forming a composite wall, wherein the first and second submerged grouting areas (3, 3) can be arranged in pairs on both sides of the composite wall and allowing the first and second connectors (1.3 ) to be positioned in pairs spaced apart from each other;

The device further comprises an additional lap joint (4) arranged in the first sinking grouting area (3) and the second sinking grouting area (3) which are arranged in pairs, wherein the additional lap joint (4) and the first connecting piece (1.3) and the second connecting piece (1.3) which are arranged in pairs are mutually staggered and indirectly overlapped, and a horizontal connecting structure capable of bearing side load is formed by means of concrete poured into the first sinking grouting area (3) and the second sinking grouting area (3).

2. The multi-and high-rise concrete modular composite building (1) according to claim 1, wherein the first precast concrete module (1A) and the second precast concrete module (1B) are each distributed with a plurality of first submerged grouting areas (3) and second submerged grouting areas (3) which are the same in number and opposite in position at intervals along the extending direction of the horizontal top plate (1.2) thereof, so that a plurality of horizontally connected structures which are distributed are formed between the first precast concrete module (1A) and the second precast concrete module (1B).

3. The multi-and high-rise concrete modular combined 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 submerged grouting area (3) and a second submerged grouting area (3) opposite to each other along the extension direction of their horizontal roof (1.2), so that a single centrally arranged horizontal connection structure is formed between the first precast concrete module (1A) and the second precast concrete module (1B).

4. The multi-and high-rise concrete modular combination building (1) according to claim 1 or 2, wherein the first (1.3) and second (1.3) connectors are steel bars pre-anchored to the first (3) and second (3) submerged grouting areas, respectively, wherein the steel bars do not extend beyond the first (3) and second (3) submerged grouting areas.

5. The multi-and high-rise concrete modular combined building (1) according to claim 1 or 2, characterized in that the additional bridge (4) is arranged centrally with respect to the composite wall such that its connection length in the horizontal direction with the first (1.3) and second (1.3) connectors is substantially the same.

6. The multi-and high-rise concrete modular combination building (1) according to claim 5, wherein the additional bridge (4) is located flush with the bottom surface of the first and second submerged grouting areas (3, 3) and the top surface of the composite wall.

7. The multi-and high-rise concrete modular combination building (1) according to claim 1 or 2, wherein the first submerged grouting area (3) and/or the second submerged grouting area (3) are designed as stepped rectangular indentations prefabricated at the edges of the horizontal roof plate (1.2).

8. The multi-and high-rise concrete modular combination building (1) according to claim 1 or 2, wherein the casting space formed between the vertical concrete walls (1.1) of the first precast concrete module (1A) and the vertical concrete walls (1.1) of the second precast concrete module (1B) has a width in the horizontal direction of typically not more than 20 mm.

9. The multi-and high-rise concrete modular combination building (1) according to claim 1 or 2, wherein the first precast concrete module (1A) and/or the second precast concrete module (1B) are designed as structural concrete modules capable of bearing shear forces and gravity forces or as non-structural concrete modules capable of bearing gravity forces only.

10. Method for constructing a multi-and high-rise concrete modular combined building (1) according to any one of claims 1 to 9, characterized by the following construction steps:

step A, providing a plurality of precast concrete modules, wherein the precast concrete modules comprise at least two vertical concrete walls (1.1) and a horizontal bottom plate and a horizontal top plate (1.2) which are arranged perpendicular to the vertical concrete walls (1.1), wherein at least one sinking grouting area (3) is precast on the horizontal top plate (1.2) of the precast concrete modules, wherein connecting pieces (1.3) are preset in the sinking grouting area (3);

Step B, vertically hoisting one concrete module into position on a foundation layer or a conversion layer of the multi-layer and high-rise concrete modular combined building (1), and then positioning the other concrete module adjacent to the positioned concrete module to form a casting space allowing concrete to be cast in and forming a composite wall between the two vertical concrete walls (1.1), wherein the horizontal top plates (1.2) of the two concrete modules are flush;

step C, plugging two sides of the casting space to form a template for cast-in-situ operation, and then casting grouting material in situ until a middle cast-in-situ grouting layer (2) with the top surface approximately flush with the bottom surface of the sinking grouting area (3) is formed, wherein the middle cast-in-situ grouting layer (2) and the adjacent vertical concrete wall (1.1) together form a composite wall;

step D, arranging an additional lap joint piece (4) in the sinking grouting area (3) so as to be in staggered indirect lap joint with the connecting piece (1.3);

and E, pouring grouting material into the sinking grouting area (3) provided with the additional lap joint part (4) in situ until the top surface of the sinking grouting area (3) is approximately flush with the horizontal top plate (1.2).

11. Method according to claim 9, characterized in that in step C, a grouting hole and a grout outlet are provided in the plugged casting space outside the precast concrete, wherein the grouting hole is designed for top-down grouting and the grout outlet is designed for bottom-up grout outlet.