Concrete modular composite building and its modular components and vertical connection construction method

Abstract

The present invention relates to a modular concrete building and a modular component and a vertical connection construction method thereof. The modular component comprises: a first precast concrete module having a first wall and a first top surface and a first bottom surface at both ends of the first wall; a second precast concrete module having a second wall and a second top surface and a second bottom surface at both ends of the second wall; the first wall and the second wall each form a plurality of connectors extending through the wall to the corresponding top surface and bottom surface, each connector having a joint section extending from the corresponding top surface, the first wall and the second wall each form a plurality of connecting channels extending through the wall to the corresponding top surface and bottom surface, the connecting channels are provided with a joint section extending to the bottom surface at one end close to the corresponding bottom surface, the plurality of connecting channels and the plurality of connecting components of the first wall and the second wall are staggered along the extension direction of the wall, and the joint sections of the plurality of connecting components of the second wall are suitable for one-to-one corresponding insertion into the joint sections of the plurality of connecting channels of the first wall.

Description

Technical Field

[0001] The invention relates to the field of advanced construction of prefabricated concrete buildings, and in particular to a concrete modular composite building and its modular components and a vertical connection construction method. Background Art

[0002] Modular composite buildings divide the building into several three-dimensional box modules and prefabricate them in the factory. These modules are then transported to the construction site for on-site connection and quick assembly into a whole, thus completing the entire construction process. The use of modular construction technology is not only conducive to improving the quality of prefabricated modules, but also completes a large number of structural, decoration and water and electricity construction operations in the factory, which can minimize on-site operations, improve on-site construction efficiency, save labor and reduce environmental impact. It is an efficient, green and low-carbon construction method that can effectively solve the problems of uneven engineering quality and low construction efficiency that are common in the construction industry.

[0003] At present, the modules that have been applied in actual projects can be divided into steel modules and concrete modules according to the main manufacturing materials. Among them, steel modules are mainly used in public buildings such as hotels, apartments, dormitories, etc., while concrete modules are more popular in residential buildings. At present, existing research focuses on steel modules, and there is generally less research on concrete modules. Different from traditional prefabricated concrete components with one-dimensional components (such as beams and columns) and two-dimensional components (such as walls and slabs), there is a significant mutual influence between adjacent modules in the construction of three-dimensional concrete modules. The installed concrete modules will cause the adjacent concrete modules to be installed to lose the external lateral working surface, while the interior decoration of the concrete modules has been completed, and construction work is not allowed. At the same time, the commonly used vertical connection technology of prefabricated concrete components requires a lateral working surface, which determines that the commonly used vertical connection technology of prefabricated components is not suitable for concrete modular construction. In the limited actual concrete modular composite buildings, except for some concrete modules with vertical connections, most concrete modules do not have vertical connections, which is not conducive to improving the structural integrity of the entire concrete modular composite building, and also limits the promotion and application of concrete modular construction in buildings. Therefore, developing innovative vertical connections and methods between modules for concrete modular composite buildings has important engineering practice value. Summary of the invention

[0004] The present invention aims to provide a modular component for concrete modular composite buildings which can solve at least part of the above-mentioned technical problems.

[0005] The present invention also aims to provide a concrete modular composite building using the above-mentioned improved module components.

[0006] The present invention also aims to provide a method for vertically connecting and constructing the above-mentioned concrete modular composite building.

[0007] According to one aspect of the present invention, a modular component is provided for constructing a concrete modular composite building, the modular component comprising: a first precast concrete module having a first wall and a first top surface and a first bottom surface respectively located at opposite ends of the first wall in the vertical direction; a second precast concrete module having a second wall and a second top surface and a second bottom surface respectively located at opposite ends of the second wall in the vertical direction; wherein a plurality of connectors penetrating the wall and extending to the corresponding top surface and bottom surface are formed in each of the first wall and the second wall, and each connector has a joint section extending from the corresponding top surface, and wherein a plurality of connecting channels penetrating the wall and extending to the corresponding top surface and bottom surface are formed in each of the first wall and the second wall, and each connecting channel is provided with a joint section extending to the corresponding bottom surface at one end close to the corresponding bottom surface, wherein the plurality of connecting channels and the plurality of connecting members of each of the first wall and the second wall are staggered along the extension direction of the corresponding wall, and the joint sections of the plurality of connecting members of the second wall are suitable for being plugged into the joint sections of the plurality of connecting channels of the first wall in a one-to-one correspondence.

[0008] The use of the inter-module vertical connection and method of the present invention innovatively solves the difficult problem that the precast concrete modules are not suitable for setting the lateral grouting working surface due to the mutual influence between the modules during construction. It can not only reduce the on-site construction workload of the concrete modular composite building, reduce the working surface and formwork requirements to significantly improve the construction efficiency, but also can improve the reliability and construction quality of the staggered non-contact overlapping vertical steel bar connection between the modules by optimizing the material size, structural measures, overlap number and length of the joint sections such as the corrugated pipe, so as to ensure the effectiveness of the vertical load transfer between the precast concrete modules, thereby improving the lateral force resistance performance of the entire concrete modular composite building.

[0009] In some embodiments, the first precast concrete module includes a first top plate and a first bottom plate connected at opposite ends of the first wall, wherein the first top surface is formed on an outer surface of the first top plate, and the first bottom surface is formed on an outer surface of the first bottom plate.

[0010] In some embodiments, the second precast concrete module includes a second top plate and a second bottom plate connected at opposite ends of the second wall, wherein the second top surface is formed on an outer surface of the second top plate, and the second bottom surface is formed on an outer surface of the second bottom plate.

[0011] In some embodiments, the diameter of the joining section is 2 to 3 times the diameter of the joint section.

[0012] In some embodiments, the connecting members are steel bars preset in the first wall and the second wall.

[0013] In some embodiments, the joint section is a corrugated tube preset in the first wall and the second wall.

[0014] According to another aspect of the present invention, there is provided a concrete modular composite building, comprising the aforementioned module components, wherein the first precast concrete module and the second precast concrete module are vertically joined together, and the joint sections of the plurality of connectors of the second precast concrete module are plugged into the joint sections of the plurality of connecting channels of the first precast concrete module one by one and are wrapped by the slurry poured into the connecting channels.

[0015] According to another aspect of the present invention, a method for vertically connecting and constructing a concrete modular composite building is provided, comprising the following steps: providing the aforementioned module components; installing the second precast concrete module in place; positioning the first precast concrete module above the second precast concrete module; lowering the first precast concrete module so that the first precast concrete module falls vertically onto the second precast concrete module, wherein the joint sections of the plurality of connectors of the second precast concrete module are correspondingly inserted into the joint sections of the plurality of connecting channels of the first precast concrete module; and grouting is performed from above the first precast concrete module so that the grout flows into the plurality of connecting channels of the first precast concrete module and wraps the joint sections therein.

[0016] In some embodiments, one layer of the concrete modular composite building includes a plurality of first precast concrete modules arranged adjacent to each other, and after the plurality of first precast concrete modules in the layer are vertically placed on corresponding second precast concrete modules, grouting is performed from above the plurality of first precast concrete modules.

[0017] In some embodiments, the “installing the second precast concrete module in place” includes hoisting the second precast concrete module into place at the foundation layer or the transfer layer.

[0018] Some of the other features and advantages of the present invention will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 It is a schematic diagram of the on-site module hoisting of a concrete modular composite building according to an embodiment of the present invention;

[0021] Figure 2is a cross-sectional view of the vertical connection between precast concrete modules according to an embodiment of the present invention;

[0022] Figure 3 is a wall section and side view of a precast concrete module using the vertical connection and method according to an embodiment of the present invention;

[0023] Figure 4 is a top view of two adjacent upper and lower precast concrete modules according to an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the hoisting installation state of two adjacent upper and lower precast concrete modules according to an embodiment of the present invention;

[0025] Figure 6 is a cross-sectional view of a wall in which two adjacent upper and lower precast concrete modules are installed in place according to an embodiment of the present invention;

[0026] Figure 7 is a schematic diagram of grouting in a reserved grouting connection channel according to an embodiment of the present invention;

[0027] Figure 8 is a cross-sectional view of a wall in which grouting of two adjacent upper and lower precast concrete modules is completed according to an embodiment of the present invention;

[0028] Figures 9 to 11 is a cross-sectional view of the vertical connection between precast concrete modules according to other embodiments of the present invention.

[0029] Description of reference numerals:

[0030] 1. First precast concrete module; 1.1. First wall; 1.2. First top plate; 1.3. First bottom plate; 2. Second precast concrete module; 2.1. Second wall; 2.2. Second

[0031] Top plate; 3. Connecting piece; 3.1. Joint section; 4. Connecting channel; 5. Joint section;

[0032] 6. Open your mouth DETAILED DESCRIPTION

[0033] Now, with reference to the accompanying drawings, the schematic scheme of the modular components for concrete modular composite buildings and the concrete modular composite buildings and the vertical connection construction method thereof disclosed in the present invention is described in detail. Although the drawings are provided to present some embodiments of the present invention, the drawings do not have to be drawn according to the dimensions of the specific embodiments, and certain features may be enlarged, removed or partially cut to better illustrate and explain the disclosure of the present invention. 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 terms appearing in the specification do not necessarily refer to all drawings or examples.

[0034] Certain directional terms used to describe the drawings below, such as "inside", "outside", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0035] The terms "first", "first", "second", "second" and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0036] In concrete modular composite buildings, three-dimensional precast concrete modules are produced in factories and transported to the site for hoisting and installation. Precast concrete modules have already completed interior decoration, furniture, and pipeline laying when they are produced. When it is necessary to form a vertical connection between adjacent precast concrete modules on the upper and lower floors, modular walls are usually used in the connection design to improve the axial bearing capacity and horizontal shear bearing capacity of the connection.

[0037] At present, four types of vertical connection designs are usually used in the construction process of actual concrete modular composite buildings, including grouting sleeves, post-grouting belts, through-grouting channels and composite wall panel connections. The inventors found that these four types of vertical connection designs all have more or less defects.

[0038] The first grouting sleeve method and the second post-grouting belt method require the grouting port or key area to be set on the side wall. This arrangement has obvious weaknesses. It is easily restricted by the adjacent precast concrete module wall and is difficult to operate. The grouting operation is generally on the key line, which will affect the construction efficiency. In addition, for the grouting sleeve method, especially when facing large-sized precast concrete modules, a large number of grouting sleeves will be required, and the construction quality is heavily dependent on the operation ability of on-site construction personnel. It is not widely applicable in the field of concrete modular composite buildings. For the post-grouting belt method, it is basically the same as the traditional precast wall connection method. The connection area is exposed, and additional construction space needs to be provided for the post-casting belt. The formwork is required for pouring operations and demolding after the operation is completed. The post-grouting belt connection method can be used to form shear walls and is only used for structural modules. The wall of another adjacent module needs to be counted as a non-structural component.

[0039] The third through-grouting channel method and the fourth composite wall panel connection method can usually be cast from the top of the precast concrete module, and no additional template is required for grouting. However, when these two connection methods are used, it will be found that the connection area is surrounded by the module wall. Because the concrete module is highly prefabricated, the internal decoration, furniture, pipelines, etc. have been installed and laid in the factory. Therefore, it is impossible to open holes in the module wall for grouting during on-site casting, otherwise the internal decoration, structure, pipelines and even furniture of the module will be polluted or damaged. The Chinese patent with publication number CN107542190A discloses such a concrete module connection method for forming a composite wall by integral grouting between walls, in which the vertical connection is formed by overlapping two steel bars in a grouting channel, and the prefabricated parts of different layers can be connected by steel bars to achieve force transmission. However, this steel bar connection requires the insertion of connecting steel bars on site and the precise alignment of the two steel bars in the same grouting channel to form an overlap, which is difficult to install and position, and is only used to form shear walls but not non-shear walls, and the thickness of the formed wall is relatively large. Another Chinese patent with publication number CN113195841A also discloses a concrete module connection method for forming a composite wall by integral grouting between walls, which uses prefabricated steel sections and steel trusses instead of steel bars, and forms vertical connections through on-site grouting and prefabricated parts. However, this connection method requires the production of a large number of embedded parts, and requires additional in-situ concrete to be cast at the joints of the upper and lower modules to form a whole. This method is only suitable for forming shear walls, and is not used for non-shear walls.

[0040] Therefore, the four existing vertical connection designs of concrete modules all have certain limitations in actual operation.

[0041] In addition, one-dimensional precast concrete components (such as precast concrete columns) and two-dimensional precast concrete components (such as precast concrete walls) are often used in the current construction industry. They also often need to be connected vertically with the help of steel bars. However, similar vertical connection designs for one-dimensional and two-dimensional precast concrete components cannot be applied to the vertical connection of precast concrete modules in concrete modular composite buildings.

[0042] The inventor's research shows that there are two main characteristics of the vertical connection between precast concrete modules used in concrete modular composite buildings. First, if the connection form requires grouting ports and grouting outlets, they are preferably arranged on the upper surface of the precast concrete module rather than the side wall; second, the protruding steel bars used for vertical connection need to be arranged on the upper part of the precast concrete module, because the precast concrete module is produced, transported, hoisted and installed on site as a whole in the factory, and the module weight is very large, even close to 30 tons, far exceeding one-dimensional and two-dimensional precast concrete components. Therefore, once the protruding steel bars are located on the side wall (horizontally extended) and the bottom, it will have an adverse effect on the placement, transportation, hoisting and installation of the module, increasing the construction cost. It is also impractical to flip the module.

[0043] Based on the characteristics of vertical connection between precast concrete modules of concrete modular composite buildings, the traditional vertical connection method obtained by one-dimensional and two-dimensional precast concrete components and their modifications cannot be applied to the vertical connection of precast concrete modules.

[0044] For example, a common vertical connection of one-dimensional or two-dimensional precast concrete components uses lateral grouting ports or outlets, which need to pass through precast concrete columns or precast concrete wall panels. This is easy to do for precast concrete columns or precast concrete wall panels because they are generally not large in size and there is enough work surface on the construction site for grouting. Because there is no decoration or pipeline layout other than the component part, there is no need to consider the damage caused by the lateral grouting port to the decoration, pipeline, etc. However, as analyzed above, this lateral grouting port or outlet is not suitable for the vertical connection of precast concrete modules.

[0045] Another common vertical connection of one-dimensional or two-dimensional precast concrete components uses connecting steel bars extending vertically downward and prefabricating grouting sleeves or corrugated pipes in the lower base. Grouting is performed in advance in the grouting sleeves or corrugated pipes, and then the connecting steel bars of the one-dimensional or two-dimensional precast concrete components are inserted into the seat grout to form an anchor. The lower base can be another precast concrete column or a thick slab base. However, as analyzed above, this type of steel bar extending from the lower part of the component is not suitable for vertical connection of precast concrete modules and will significantly increase the wall thickness.

[0046] In addition, the inventors have also found that even if the existing one-dimensional or two-dimensional precast concrete component vertical connection method is modified, it cannot be applied to the vertical connection of precast concrete modules in concrete modular composite buildings in terms of mechanical principles and usage purposes.

[0047] For example, the grouting port in the first one-dimensional or two-dimensional precast concrete component vertical connection method is changed to be arranged above the component, but the insertion of the connecting steel bar from the bottom of the component to the grouting channel is not changed. This modification is impractical and unnecessary in actual operation, because the original purpose is to form a vertical connection through steel bar anchoring, that is, the precast component is vertically connected with the lower base or precast part through this grouting design, but the precast part above the precast part cannot transmit axial force and horizontal shear force through the steel bar anchoring. In addition, setting the grouting port or grouting outlet on the upper surface of the precast component will significantly increase the grouting operation volume, and relevant specifications such as the "Technical Standards for Prefabricated Concrete Construction" in mainland China and the Code of Practice for Precast Concrete Construction in the Hong Kong Special Administrative Region of China have regulations on the extension length of the steel bars of precast components. Blindly increasing the length of the grouting channel will only increase the construction cost, but will not increase the connection strength. Therefore, the first one-dimensional or two-dimensional precast concrete component vertical connection method cannot be applied to the vertical connection between precast concrete modules through modification.

[0048] For another example, the grouting port in the first one-dimensional or two-dimensional precast concrete component vertical connection method is changed to be arranged above the component, and the length of the inserted steel bar is increased, and another steel bar is used for lap connection. This variant is similar to the steel bar connection disclosed in CN107542190A, and its defects have been discussed above and will not be repeated here.

[0049] For another example, the grouting port in the first type of vertical connection of one-dimensional or two-dimensional precast concrete components is changed to be arranged above the component, and the length of the extension into the component is increased. A typical example of this modification is often seen in the connection between the piers and the bridge deck of a bridge. In this case, the entire grouting channel runs through the bridge deck, and grouting is performed by blocking the lower surface of the bridge deck. However, this design is still essentially a steel bar anchoring and is not suitable for vertical connection between precast concrete modules.

[0050] For another example, the second one-dimensional or two-dimensional precast concrete component vertical connection method is changed to turn the precast components upside down so that the steel bar joints extend from the upper part of the components. This modification is still common in bridge connection design. In essence, it is still the traditional arrangement of two steel bars in a grouting channel for overlap anchoring, and is not suitable for vertical connection between precast concrete modules.

[0051] After extensive research, the inventor proposed the improved concrete modular composite building connection member and vertical connection construction method of the present application. For the concrete modular composite building, the reserved connectors and reserved on-site grouting connection channels in the concrete walls of the adjacent upper and lower precast concrete modules are used. The grouting channel and the connector of each precast concrete module are staggered, and the grouting channel is only used to accommodate the extended joint section of the lower precast concrete module, so as to form an effective staggered non-contact lap vertical connection between the upper and lower precast concrete modules, which can realize vertical load transfer to jointly resist the vertical load and lateral load of the concrete modular composite building. The technical solution of the present invention can solve the problem that the precast concrete module is not suitable for setting the lateral grouting working surface due to the mutual influence between the modules during construction by means of the grouting port formed on the top surface of the precast concrete module, and improve the construction efficiency and ensure the grouting quality by using a thicker caliber joint section at one end of the grouting channel to accommodate the joint section of the connector, so as to provide a more competitive structure and construction scheme for concrete modular composite buildings.

[0052] Combine the following Figures 1 to 9 The concrete modular composite building and its connecting components and vertical connection construction method of the present invention are described.

[0053] The inter-module vertical connection member of the concrete modular composite building of the present invention involves two adjacent upper and lower precast concrete modules, namely, a first precast concrete module 1 and a second precast concrete module 2, which are both precast in a factory. The first precast concrete module 1 includes a vertically extending first concrete module wall (hereinafter referred to as the first wall) 1.1, a first top plate 1.2 connected to the top of the first wall 1.1, and a first bottom plate 1.3 connected to the bottom of the first wall 1.1, wherein according to the embodiment shown in the figure, the outer surface of the first top plate 1.2 facing away from the first bottom plate 1.3 is configured as the top surface of the first precast concrete module 1, and the outer surface of the first bottom plate 1.3 facing away from the first top plate 1.2 is configured as the bottom surface of the first precast concrete module 1. The second precast concrete module 2 includes a second concrete module wall (hereinafter referred to as the second wall) 2.1 extending vertically, a second top plate 2.2 connected to the top of the second wall 2.1, and a second bottom plate (not shown in the figure) connected to the bottom of the second wall 2.1, wherein according to the embodiment shown in the figure, the outer surface of the second top plate 2.2 facing away from the second bottom plate is configured as the top surface of the second precast concrete module 2, and the surface of the second bottom plate facing away from the second top plate 2.2 is configured as the bottom surface of the second precast concrete module 2.

[0054] When the first precast concrete module 1 and the second precast concrete module 2 are prefabricated in the factory, a plurality of connectors 3 and connecting channels 4 for on-site grouting are reserved in the first wall 1.1 and the second wall 2.1. These connectors 3 and connecting channels 4 in each precast concrete module are arranged in a staggered manner, that is, one connector 3 is provided between every two adjacent connecting channels 4, and one connecting channel 4 is provided between every two adjacent connectors 3. These connectors 3 and connecting channels 4 are preferably arranged at even intervals. When two precast concrete modules are vertically aligned and connected, the positions of the connectors of different precast concrete modules are staggered, and similarly, the positions of the connecting channels of different precast concrete modules are also staggered.

[0055] Each connector 3 extends vertically through the entire wall in the corresponding first wall 1.1 or second wall 2.1, and the top end of the connector 3 extends out of the outer surface of the corresponding first top plate 1.2 or the outer surface of the second top plate 2.2 to form a joint section 3.1 with sufficient anchoring length, and the end surface of the bottom end can be kept flush with the outer surface of the first bottom plate 1.3 or the outer surface of the second bottom plate. The connector 3 can be a steel bar reserved in the wall or other metal or non-metal parts with sufficient strength.

[0056] Each connecting channel 4 extends vertically in the corresponding first wall 1.1 or second wall 2.1, the top end of the connecting channel 4 penetrates the outer surface of the corresponding first top plate 1.2 or second top plate 2.2 to form a grouting port on the outer surface of the top plate, and the bottom end of the connecting channel 4 penetrates the outer surface of the corresponding first bottom plate 1.3 or second bottom plate to form an orifice on the outer surface of the bottom plate for inserting the joint section 3.1. The connecting channel 4 is divided into two sections along its longitudinal direction, namely, a first section with a smaller cross-sectional size and a second section 5 with a larger cross-sectional size, wherein the grouting port is formed at the top end of the first section, and the orifice for inserting the joint section 3.1 is formed at the bottom end of the second section 5, thereby the second section 5 also serves as a joint section 5 for accommodating the joint section 3.1. The cross-sectional size of the joint section 5 is designed to be larger than the cross-sectional size of the joint section 3.1, so that the grout injected from the grouting port located on the top surface of the precast concrete module can enter the joint section 5 along the connecting channel 4 and wrap the joint section 3.1 inserted into the joint section 5 to form an effective anchoring. The joint section 5 can be a corrugated pipe preset in the wall when the precast concrete modules are produced in the factory. When the two precast concrete modules are vertically aligned and connected, the extended joint section of the connecting piece of the lower precast concrete module is aligned one by one with the joint section of the connecting channel of the upper precast concrete module.

[0057] Although the figure only shows that the outer surface of the top plate of the precast concrete module is the top surface of the precast concrete module and the outer surface of the bottom plate of the precast concrete module is the bottom surface of the precast concrete module, those skilled in the art will understand that the top surface of the precast concrete module is not limited to being formed by the top plate, and the bottom surface is not limited to being formed by the bottom plate. Fig.10 In another embodiment of the present invention, the top surface of the wall of the precast concrete module can be used as the top surface of the precast concrete module, and Fig.11 In another embodiment, the bottom end surface of the wall can be used as the bottom surface of the prefabricated concrete module ( Fig.11 The non-structural wall on the right is not shown), the grouting connection channel can penetrate the top end surface of the wall to form a grouting port, and the joint section can also penetrate the bottom end surface of the wall to open for the joint section of the connector of another precast concrete module to be inserted.

[0058] During construction, one of the precast concrete modules is first hoisted into place as the lower concrete module, while positioning the other precast concrete module (as the upper concrete module); when hoisting the upper concrete module, the reserved on-site grouting connection channel in its wall will be aligned one by one with the reserved connectors (such as connecting steel bars) set in the lower concrete module, and at the same time, the connectors in the wall of the upper concrete module are staggered one by one with the connectors in the lower concrete module, and the joint sections of the reserved connectors in the lower concrete module can all be accurately inserted into the thicker joint sections at the lower end of the reserved on-site grouting connection channel in the upper concrete module, and the vertical connection between the modules is formed by the connection of the connectors. After the upper concrete module is hoisted, grouting is performed from the top of the upper concrete module into the reserved on-site grouting connection channel, and the bottom plate of the upper concrete module and the top plate of the lower concrete module are connected by grouting to form a blockage in the interface of their respective walls.

[0059] By adopting the vertical connection technology of the present invention, there is only one connector in a grouting connection channel, the inserted joint section is easy to locate, and the binding and alignment work required for direct lap joint of traditional steel bars is omitted, which improves the construction efficiency and reduces the construction difficulty, and it is easier to control the construction quality. The connection technology between the adjacent upper and lower precast concrete modules is through the grouting joint section without contact with the joint section. The staggered reserved connectors and the reserved on-site grouting connection channels in each wall form an effective staggered non-contact lap vertical connection. The staggered connectors between modules of different layers are non-contact lapped to form an overall vertical force transmission path, which can realize vertical load transfer to jointly resist the vertical and lateral loads of the concrete modular composite building. The constructed structural module connection and non-structural module connection are universal, and the shear wall and non-shear wall are universal, and the restriction on the wall thickness is also reduced.

[0060] The size, position and quantity of the reserved connectors 3, reserved on-site grouting connection channels 4 and joint sections 5 are determined according to the structural design and module type. A reliable staggered non-contact lap vertical connection is formed between adjacent upper and lower precast concrete modules by staggered reserved connectors 3 and reserved on-site grouting connection channels 4. It is necessary to ensure that there is a suitable lap length and spacing between the reserved connectors 3 in the first wall 1.1 of the upper layer and the corresponding joint sections 3.1 of the second wall 2.1 of the lower layer. The length of the joint section 5 should be slightly longer than the length of the joint section 3.1 to be inserted and meet the requirements for the anchoring of the connector. The diameter of the joint section 5 should meet the requirements for rapid construction and ensuring the quality of grouting. Preferably, the diameter of the joint section 5 is about 2 to 3 times the diameter of the joint section 3.1. The present invention does not intend to limit or give specific values ​​of these design parameters, because these design parameters can be flexibly determined according to local structural design specifications and module sizes, or determined by experimental results in the case of over-limit design. For example, by adopting a new type of high-performance grouting material, such as adding steel fibers, etc., the longitudinal lengths of the joint section 3.1 and the joint section 5 of the connector 3 can be appropriately shortened while ensuring the connection performance.

[0061] The method for constructing a concrete modular composite building using the modular components of the present invention will be described in detail below with reference to the accompanying drawings.

[0062] Step 1: Reference Figure 1 , transport the precast concrete modules from the precast factory to the construction site, select one of the precast concrete modules (such as the second precast concrete module 2), lift it to the installation position and calibrate it. The second precast concrete module 2 can be installed on the foundation layer or the transfer layer.

[0063] Step 2: Reference Figures 3 to 5 , another precast concrete module (for example, the first precast concrete module 1) is hoisted to the top of the second precast concrete module 2 and adjusted to an accurate horizontal position.

[0064] Step 3: Reference Figure 5 , the first precast concrete module 1 is lowered vertically, so that the lower end joint section 5 of the reserved on-site grouting connection channel 4 of the first precast concrete module 1 adjacent to each other is plugged into the joint section 3.1 of the connecting piece 3 of the second precast concrete 2 in a one-to-one correspondence, referring to Figure 2 and Figure 6 .

[0065] Step 4: Reference Figure 7 and Figure 8, on-site grouting is performed above the first precast concrete module 1, and grouting is performed from the grouting port of the reserved grouting connection channel 4 on the first top plate 1.2. After the grouting material enters the lower joint section 4 along the connection channel 4, it wraps and bonds the joint section 3.1 of the inserted second precast concrete module 2. After anchoring, the joint section 3.1 of the connector 3 of the second precast concrete module 2 located at the lower layer forms a staggered non-contact overlapping vertical connection with the adjacent reserved connector 3 in the first wall 1.1 of the first precast concrete module 1 located at the upper layer, thereby forming a vertical connection between the upper and lower adjacent first precast concrete modules 1 and second precast concrete modules 2. The first bottom plate 1.3 of the adjacent first precast concrete module 1 and the second top plate 2.2 of the second precast concrete module 2 are sealed by the seat mortar.

[0066] When constructing a modular concrete building according to the present invention, the first precast concrete module 1 and the second precast concrete module 2 can be stacked vertically aligned on the foundation or transfer layer. After the first precast concrete module 1 of the upper layer is hoisted and positioned, all the reserved on-site grouting connection channels 4 are grouted. In addition, the grouting of the reserved on-site grouting connection channels 4 can be carried out layer by layer, after all the precast concrete modules cast in each layer are hoisted in place and the adjacent wall 1.1 is positioned.

[0067] Although the figure shows that the first precast concrete module 1 and the second precast concrete module 2 each have four first walls 1.1 and four second walls 1.2, those skilled in the art will appreciate that the number and configuration of the walls in each precast concrete module may be adjusted according to the architectural design, for example, it may include curved walls, may be less than four walls or more than four walls, and may have openings 6 (see FIG. 1 ) in the wall, such as doors and windows. Fig. 9 ), etc., as long as the force transfer between modules and the local design specifications can be met, and the wall thickness of the precast concrete module can meet the requirements, the vertical connection method between modules of the present invention can be adopted.

[0068] The technical solution of the present invention can achieve a series of advantages, including:

[0069] 1. Use vertical grouting operation to carry out on-site grouting from the grouting connection channel reserved on the top plate of the precast concrete module. No lateral working surface is required, which can solve the problem that it is not suitable to set up a lateral grouting working surface for precast concrete modules due to the mutual influence between modules during construction.

[0070] 2. The template work for grouting is eliminated or reduced, and the on-site grouting work is less, which is conducive to improving construction efficiency and quality.

[0071] 3. The joint section of the connector of the lower precast concrete module is inserted into the larger diameter joint section of the upper precast concrete module, which is convenient for installation and centering, and has high construction efficiency. The top-down grouting operation performed by the reserved grouting connection channel is less affected by the reserved inserted joint section, and the grouting quality is easier to ensure than that of traditional grouting sleeves and large-volume grouting.

[0072] 4. Use a joint section such as a corrugated pipe to connect the reserved connecting parts in the wall of the lower precast concrete module at the bottom of the wall. This connection form will significantly improve the bonding performance of the grouting material inside the joint section and the joint section of the connecting part due to the restraining effect of the joint section. Compared with the traditional connection form of direct overlap between connecting parts (rebars) and connecting parts (rebars), it can significantly reduce the amount of connecting parts used and obtain better connection strength.

[0073] 5. Compared with the traditional anchor connection form of connectors, the inter-module vertical connection method of the present invention forms a reliable vertical connection of the module wall as a whole through the contactless overlap form of connectors, and transmits force through the module wall as a whole between different floors, thereby improving the integrity of the concrete modular composite building structure and helping to improve the overall lateral force resistance performance of the modular composite building.

[0074] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0075] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A modular component for constructing a concrete modular composite building, characterized in that: The module components include: The first prefabricated concrete module (1) comprises a first wall (1.1) and a first top surface and a first bottom surface respectively located at two opposite ends of the first wall (1.1) in the vertical direction, wherein: A plurality of connecting members are formed in the first wall (1.1), penetrating the first wall (1.1) and extending toward the first top surface and the first bottom surface, and each connecting member has a joint section extending from the first top surface. A plurality of connecting channels are also formed in the first wall (1.1) and extend toward the first top surface and the first bottom surface, and each connecting channel is provided with a joint section extending to the first bottom surface at one end close to the first bottom surface. The plurality of connecting members and the plurality of connecting channels in the first wall (1.1) are staggered and arranged at intervals along the lateral extension direction of the first wall (1.1), so that a connecting member is provided between two adjacent first connecting channels, and a connecting channel is provided between two adjacent connecting members; The second prefabricated concrete module (2) comprises a second wall (2.1) and a second top surface and a second bottom surface respectively located at opposite ends of the second wall (2.1) in the vertical direction, wherein: A plurality of connecting members are formed in the second wall (2.1), penetrating the second wall (1.1) and extending toward the second top surface and the second bottom surface, and each connecting member has a joint section extending from the second top surface. A plurality of connecting channels are also formed in the second wall (2.1) and extend toward the second top surface and the second bottom surface, and each connecting channel is provided with a joint section extending to the second bottom surface at one end close to the second bottom surface. The plurality of connecting members and the plurality of connecting channels in the second wall (2.1) are staggered and arranged at intervals along the lateral extension direction of the second wall (2.1), so that a connecting member is provided between two adjacent connecting channels, and a connecting channel is provided between two adjacent connecting members; The positions of the connecting members in the first wall (1.1) and the connecting members in the second wall (2.1) are staggered, and the positions of the connecting channels in the first wall (1.1) and the connecting channels in the second wall (2.1) are staggered, so that when the first precast concrete module (1) and the second precast concrete module (2) are stacked up and down, the joint sections of the multiple connecting members of the second wall (2.1) are suitable for being plugged into the joint sections (5) of the multiple connecting channels of the first wall (1.1) in a one-to-one correspondence.

2. The modular component according to claim 1, characterized in that The first precast concrete module (1) comprises a first top plate (1.2) and a first bottom plate (1.3) connected to opposite ends of the first wall (1.1), wherein the first top surface is formed on the outer surface of the first top plate (1.2), and the first bottom surface is formed on the outer surface of the first bottom plate (1.3).

3. The modular component according to claim 1, characterized in that The second precast concrete module (2) comprises a second top plate (2.2) and a second bottom plate connected to opposite ends of the second wall (2.1), wherein the second top surface is formed on the outer surface of the second top plate (2.2), and the second bottom surface is formed on the outer surface of the second bottom plate.

4. The modular component according to claim 2, characterized in that The diameter of the joining section (5) is 2 to 3 times the diameter of the connecting section (3.1).

5. The modular component according to any one of claims 1 to 4, characterized in that The connecting member (3) is a steel bar preset in the first wall (1.1) and the second wall (2.1).

6. The modular component according to any one of claims 1 to 4, characterized in that The joint section (5) is a corrugated tube preset in the first wall (1.1) and the second wall (2.1).

7. A concrete modular composite building, characterized in that: A modular component comprising any one of claims 1 to 6, wherein the first precast concrete module (1) and the second precast concrete module (2) are joined together vertically, and the joint sections (3.1) of the plurality of connecting pieces (3) of the second precast concrete module (2) are plugged into the joint sections (5) of the plurality of connecting channels (4) of the first precast concrete module (1) one by one and are wrapped by the slurry poured into the connecting channels (4).

8. A method for vertically connecting and constructing a concrete modular composite building, characterized in that: The following steps are involved: Providing a modular component according to any one of claims 1 to 6; Installing the second prefabricated concrete module (2) in place; Positioning the first precast concrete module (1) above the second precast concrete module (2); Lowering the first precast concrete module (1) so that the first precast concrete module (1) is placed vertically on the second precast concrete module (2), wherein the joint sections (3.1) of the plurality of connecting members (3) of the second precast concrete module (2) are plugged into the joint sections (5) of the plurality of connecting channels (4) of the first precast concrete module (1) in a one-to-one correspondence; Grouting is performed from above the first precast concrete module (1), so that the grout flows into the multiple connecting channels (4) of the first precast concrete module (1) and wraps around the joint sections (3.1) therein.

9. The method for constructing a concrete modular composite building according to claim 8, characterized in that: A layer of the concrete modular composite building comprises a plurality of first precast concrete modules (1) arranged adjacent to each other, and after the plurality of first precast concrete modules (1) in the layer are vertically placed on corresponding second precast concrete modules (2), grouting is performed from above the plurality of first precast concrete modules (1).

10. The method for constructing a concrete modular composite building according to claim 8, characterized in that: The "installing the second precast concrete module (2) in place" includes hoisting the second precast concrete module (2) in place at the foundation layer or the transfer layer.

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