Prefabricated double-sided laminated shear wall and lightning protection grounding system

Abstract

The utility model belongs to the technical field of modular buildings, and particularly relates to a prefabricated double-faced laminated shear wall. A notch is formed in the lower end of an outer prefabricated wall body in the shear wall, the lower end of a lightning protection downlead extends out of the notch to the bottom end of the outer prefabricated wall body, and the upper end of the lightning protection downlead extends out of the outer prefabricated wall body; when two vertically adjacent modules are spliced, the part, extending out of the outer prefabricated wall body, of the lower anti-thunder down lead is connected with the part, located in the notch, of the upper anti-thunder down lead, and electrical communication is formed. The utility model further relates to a lightning protection grounding system, the part, located in the notch, of the lightning protection downlead on the bottom layer is connected with a basic grounding device, and the part, extending out of the outer prefabricated wall body, of the lightning protection downlead on the top layer is connected with a roof lightning receiving device. Therefore, when the two vertically adjacent modules are spliced, the two vertically adjacent lightning protection downleads can be connected in the notches, the electrical continuity is ensured, the modular building has the lightning protection function, the construction process of the lightning protection grounding system is simplified, and the construction progress is accelerated.

Description

Technical Field

[0001] The utility model belongs to the technical field of modular buildings, and in particular relates to a prefabricated double-sided composite shear wall and a lightning protection grounding system. Background Art

[0002] Building modularization is a method of breaking down buildings, structures, electromechanical systems, etc. into separate small modules that are both independent of each other and tightly integrated as a whole. Modules can be mass-produced in factories, with high integration and precision. After the modules are produced, they are transported to the site for hoisting to complete the construction of the building. Compared with traditional construction methods, it can greatly shorten the construction time, reduce carbon emissions, reduce on-site construction noise and dust, and reduce the risk factor of on-site construction.

[0003] The shear wall structure uses reinforced concrete wall panels to replace the beams and columns in the frame structure. It can bear the internal forces caused by various loads and effectively control the horizontal forces of the structure. This structure is widely used in modules to divide the space. The prefabricated double-sided composite shear wall structure is a double-layer composite shear wall. The double-layer composite shear wall is prefabricated in the factory and delivered to the construction site for assembly. The cross section of the entire wall is hardened by the cast-in-place concrete in the cavity to form an integrated solid wall.

[0004] However, when splicing modules, the electrical continuity of the lightning protection device needs to be considered. Otherwise, the modular integrated building will not be able to conduct lightning into the underground to achieve the lightning protection effect, which will inevitably cause safety hazards. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a prefabricated double-sided composite shear wall and a lightning protection grounding system, thereby solving the technical problem of electrical non-continuity when connecting modules.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0009] On the one hand, an embodiment of the utility model provides a prefabricated double-sided composite shear wall, comprising an outer leaf prefabricated wall and an inner leaf prefabricated wall connected as one body, and also comprising a lightning protection down conductor, which is buried in the outer leaf prefabricated wall; a notch is provided at the lower end of the outer wall of the outer leaf prefabricated wall, and the lower end of the lightning protection down conductor extends out of the notch to the bottom end of the outer leaf prefabricated wall, and the upper end of the lightning protection down conductor extends out of the top of the outer leaf prefabricated wall; when two adjacent modules are spliced, an installation seam is left between the upper and lower adjacent outer leaf prefabricated walls, and the part of the lightning protection down conductor in the lower outer leaf prefabricated wall that extends out of the top of the outer leaf prefabricated wall is fixedly connected to at least a part of the lightning protection down conductor in the upper outer leaf prefabricated wall that is located in the notch.

[0010] Furthermore, the length of the fixed connection portion between two upper and lower adjacent lightning protection down conductors is greater than or equal to twice the width of the lightning protection down conductor.

[0011] Furthermore, the material of the lightning protection down conductor is hot-dip galvanized flat steel.

[0012] Furthermore, the size of the lightning protection down conductor is 25×4 mm.

[0013] Furthermore, the length of the portion of the lightning protection down conductor extending out of the top of the outer leaf prefabricated wall is greater than or equal to 70 mm.

[0014] Furthermore, the size range of the notch is 120×50×10 mm to 200×70×10 mm.

[0015] Furthermore, the inner leaf precast wall and the outer leaf precast wall are both precast concrete walls with a thickness of at least 50 mm.

[0016] Furthermore, the inner leaf prefabricated wall and the outer leaf prefabricated wall are parallel to each other, and the distance between them is greater than or equal to 100 mm.

[0017] Furthermore, the inner leaf prefabricated wall and the outer leaf prefabricated wall are connected by a steel truss, and concrete is poured into the cavity formed between the two so that the inner leaf prefabricated wall and the outer leaf prefabricated wall form an integrated solid wall.

[0018] On the other hand, an embodiment of the utility model also provides a lightning protection grounding system, including a basic grounding device, lightning protection down conductors in several layers of prefabricated double-sided composite shear walls in the vertical direction, and a roof lightning termination device; the basic grounding device includes a connected grounding grid located underground and flat steel extending above the ground, at least part of the lightning protection down conductor located in the groove in the outer leaf prefabricated wall of the bottom layer is connected to the flat steel, and the part of the lightning protection down conductor in the outer leaf prefabricated wall of the top layer that extends out of the top of the outer leaf prefabricated wall is connected to the roof lightning termination device.

[0019] (III) Beneficial effects

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides a prefabricated double-sided composite shear wall. A notch is opened at the lower end of the outer wall of the outer leaf prefabricated wall, and a lightning protection down conductor is buried in the outer leaf prefabricated wall, so that the upper end of the lightning protection down conductor extends out of the outer leaf prefabricated wall and the lower end extends out of the notch. When two upper and lower adjacent modules are spliced, the lightning protection down conductors in the upper and lower adjacent outer leaf prefabricated walls can be connected in the notch, thereby ensuring electrical continuity.

[0022] The utility model discloses a lightning protection grounding system, comprising a foundation grounding device, a lightning protection down conductor in a prefabricated double-sided composite shear wall and a roof lightning conductor. Since the lightning protection down conductor enables the prefabricated double-sided composite shear wall to have electrical continuity, when the modular building is spliced, the lightning protection down conductor in the prefabricated double-sided composite shear wall on the top floor is connected to the roof lightning conductor, and the lightning protection down conductor in the prefabricated double-sided composite shear wall on the bottom floor is connected to the foundation grounding device, so that the modular building can have a lightning protection effect, and the construction process of the lightning protection grounding system is relatively simplified, the on-site operation volume is small, and it only needs to connect the lightning protection down conductor in the notch between the upper and lower layers, thereby accelerating the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of the lightning protection down conductor in the prefabricated double-sided composite shear wall extending out of the top of the outer leaf prefabricated wall;

[0024] Figure 2 This is a structural schematic diagram of the lightning protection down conductor extending out of the slot in the prefabricated double-sided composite shear wall;

[0025] Figure 3 A schematic diagram of the structure of the fixed connection of two upper and lower adjacent lightning protection down conductors when two upper and lower adjacent modules are spliced;

[0026] Figure 4 for Figure 3 A is a partial enlarged schematic diagram of the middle part.

[0027] [Description of Reference Numerals]

[0028] 1: outer leaf prefabricated wall; 11: notch;

[0029] 2: Inner leaf prefabricated wall; 3: Lightning protection down conductor; 4: Installation joint; 5: Concrete; 6: Foamed polyethylene rod; 7: Building waterproof sealant. DETAILED DESCRIPTION

[0030] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0031] like Figure 1-3As shown, the utility model provides a prefabricated double-sided composite shear wall, including an outer leaf prefabricated wall 1 and an inner leaf prefabricated wall 2 which are directly connected into one body without limitation, the inner leaf prefabricated wall 2 and the outer leaf prefabricated wall 1 are both concrete prefabricated walls with a thickness of at least 50 mm, the inner leaf prefabricated wall 2 and the outer leaf prefabricated wall 1 are parallel to each other, and the distance between the two is greater than or equal to 100 mm, and the actual distance should be determined according to the thickness of the prefabricated double-sided composite shear wall. Specifically, the inner leaf prefabricated wall 2 and the outer leaf prefabricated wall 1 are connected by a steel truss, and concrete 5 is poured into the cavity formed between the two so that the inner leaf prefabricated wall 2 and the outer leaf prefabricated wall 1 form an integrated solid wall.

[0032] A lightning protection down conductor 3 is embedded in the outer leaf prefabricated wall 1, and the lightning protection down conductor 3 can be prefabricated in the factory. Figure 2 , Figure 3 As shown, a notch 11 is provided at the lower end of the outer wall of the outer leaf prefabricated wall 1, and the lower end of the lightning protection down conductor 3 extends out of the notch 11 to the bottom end of the outer leaf prefabricated wall 1. Figure 1 , Figure 3 As shown, the upper end of the lightning protection down conductor 3 extends out of the top of the outer leaf prefabricated wall 1.

[0033] When the upper and lower adjacent modules are connected during on-site construction, Figure 3 As shown, an installation seam 4 is left between the upper and lower adjacent outer leaf prefabricated walls 1, and a foamed polyethylene rod 6 is placed in the installation seam 4 to prevent the concrete 5 subsequently poured between the outer leaf prefabricated wall 1 and the inner leaf prefabricated wall 2 from flowing out of the installation seam 4, and then concrete 5 is poured into the cavity formed between the outer leaf prefabricated wall 1 and the inner leaf prefabricated wall 2 to form an integrated solid wall between the inner leaf prefabricated wall 2 and the outer leaf prefabricated wall 1. Next, the portion of the lightning protection down conductor 3 in the lower outer leaf prefabricated wall 1 extending from the top of the outer leaf prefabricated wall 1 is fixedly connected to at least part of the lightning protection down conductor 3 in the upper outer leaf prefabricated wall 1 located in the notch 11, and then the notch 11 is repaired with the external wall water-resistant and crack-resistant mortar to cover the exposed lightning protection down conductor 3, and finally the installation seam 4 is sealed tightly with the building waterproof sealant 7 to prevent the outside water from penetrating into the prefabricated double-sided composite shear wall from the installation seam 4. The length of the fixed connection portion between two upper and lower adjacent lightning protection down conductors 3 is greater than or equal to twice the width of the lightning protection down conductor 3. The size of the installation seam 4 is preferably 20 mm.

[0034] Preferably, the material of the lightning protection down conductor 3 is hot-dip galvanized flat steel. When the upper and lower modules are spliced, if there is a distance between the respective lightning protection down conductors 3, it is easy to bend, which is conducive to upper and lower alignment and easier to operate.

[0035] Preferably, the size of the lightning protection down conductor 3 is set to 25×4 mm, and accordingly, the size range of the notch 11 is 120×50×10 mm to 200×70×10 mm, and the length of the portion of the lightning protection down conductor 3 extending from the top of the outer leaf prefabricated wall 1 is greater than or equal to 70 mm. In this way, the length of the fixed connection portion between the two adjacent lightning protection down conductors 3 above and below can meet the electrical continuity.

[0036] The utility model also provides a lightning protection grounding system, including a foundation grounding device (not shown in the figure), a lightning protection down conductor 3 in several layers of prefabricated double-sided composite shear walls in the vertical direction, and a roof lightning arrester (not shown in the figure).

[0037] The foundation grounding device includes a connected grounding grid located underground and flat steel extending above the ground, and the flat steel in the foundation grounding device is made of stainless steel. At least part of the lightning protection down conductor 3 located in the notch 11 in the outer leaf prefabricated wall 1 of the bottom layer is connected to the flat steel, and the part of the lightning protection down conductor 3 in the outer leaf prefabricated wall 1 of the top layer extending from the top of the outer leaf prefabricated wall 1 is connected to the roof lightning termination device. In this way, the roof lightning termination device first receives lightning, and then guides the lightning to the foundation grounding device through the lightning protection down conductor 3, and finally achieves the effect of guiding lightning into the ground to prevent lightning.

[0038] Installation steps of lightning protection grounding system:

[0039] 1. Prefabricated double-sided composite shear walls with lightning protection down conductors prefabricated in the factory.

[0040] 2. Set up the foundation grounding device on site.

[0041] 3. During the on-site foundation construction, at least part of the lightning protection down conductor 3 located in the notch 11 in the outer leaf prefabricated wall 1 of the prefabricated double-sided composite shear wall in the module of the bottom layer is connected to the flat steel in the foundation grounding device to maintain electrical connectivity; the lightning protection down conductor 3 between the upper and lower modules is connected in the corresponding notch 11 to maintain electrical connectivity.

[0042] 4. After the top module is installed, the part of the lightning protection down conductor 3 in the outer leaf prefabricated wall 1 of the prefabricated double-sided composite shear wall in the top module extending out of the top of the outer leaf prefabricated wall 1 is connected to the roof lightning arrester to maintain electrical connectivity.

[0043] 5. Conduct an electrical continuity test and measure the resistance between the roof lightning arrester and the foundation grounding device. The resistance must not exceed 1Ω.

[0044] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0047] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A prefabricated double-sided composite shear wall, comprising an outer leaf prefabricated wall body (1) and an inner leaf prefabricated wall body (2) connected into one body, characterized in that: It also includes a lightning protection down conductor (3), wherein the lightning protection down conductor (3) is buried in the outer leaf prefabricated wall (1); A notch (11) is provided at the lower end of the outer wall of the outer leaf prefabricated wall (1), the lower end of the lightning protection down conductor (3) extends out of the notch (11) to the bottom end of the outer leaf prefabricated wall (1), and the upper end of the lightning protection down conductor (3) extends out of the top end of the outer leaf prefabricated wall (1); When two upper and lower adjacent modules are spliced, an installation seam (4) is left between the upper and lower adjacent outer leaf prefabricated walls (1), and the portion of the lightning protection down conductor (3) in the lower outer leaf prefabricated wall (1) extending from the top of the outer leaf prefabricated wall (1) is fixedly connected to at least a portion of the lightning protection down conductor (3) in the upper outer leaf prefabricated wall (1) located in the notch (11).

2. The prefabricated double-sided composite shear wall according to claim 1, characterized in that: The length of the fixed connection portion between two upper and lower adjacent lightning protection down conductors (3) is greater than or equal to twice the width of the lightning protection down conductor (3).

3. The prefabricated double-sided composite shear wall according to claim 1, characterized in that: The material of the lightning protection down conductor (3) is hot-dip galvanized flat steel.

4. The prefabricated double-sided composite shear wall according to claim 1, characterized in that: The size of the lightning protection down conductor (3) is 25×4 mm.

5. The prefabricated double-sided composite shear wall according to claim 1, characterized in that: The length of the portion of the lightning protection down conductor (3) extending out of the top end of the outer leaf prefabricated wall (1) is greater than or equal to 70 mm.

6. The prefabricated double-sided composite shear wall according to claim 1, characterized in that: The size range of the notch (11) is 120×50×10 mm to 200×70×10 mm.

7. The prefabricated double-sided composite shear wall according to claim 1, characterized in that: The inner leaf prefabricated wall (2) and the outer leaf prefabricated wall (1) are both prefabricated concrete walls with a thickness of at least 50 mm.

8. The prefabricated double-sided composite shear wall according to claim 1, characterized in that: The inner leaf prefabricated wall (2) and the outer leaf prefabricated wall (1) are parallel to each other, and the distance between them is greater than or equal to 100 mm.

9. The prefabricated double-sided composite shear wall according to claim 1, characterized in that: The inner leaf prefabricated wall (2) and the outer leaf prefabricated wall (1) are connected via a steel truss, and concrete (5) is poured into the cavity formed between the two so that the inner leaf prefabricated wall (2) and the outer leaf prefabricated wall (1) form an integrated solid wall.

10. A lightning protection grounding system, characterized in that: It comprises a foundation grounding device, several layers of the lightning protection down conductor (3) in the prefabricated double-sided composite shear wall according to any one of claims 1 to 9 in the vertical direction, and a roof lightning termination device; The basic grounding device comprises a connected grounding grid located underground and flat steel extending above the ground; at least a portion of the lightning protection down conductor (3) located in the notch (11) in the outer leaf prefabricated wall (1) of the bottom layer is connected to the flat steel; and a portion of the lightning protection down conductor (3) in the outer leaf prefabricated wall (1) of the top layer extending from the top of the outer leaf prefabricated wall (1) is connected to the roof lightning arrester.

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