Fully-fabricated concrete box-type house
By designing empty surfaces in the fully prefabricated container house and adjusting the center of gravity using horizontal connectors and infilled sandwich walls, the problem of multiple walls was solved, material savings and improved hoisting stability were achieved, ensuring the safety and service life of the structure.
Patent Information
- Application Number
- CN202423001695.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing fully prefabricated container houses have multiple walls after assembly, resulting in material waste, low construction efficiency, and high instability during hoisting.
The design of the single-unit container house has an empty surface, and the center of gravity is adjusted by combining horizontal connectors and infilled sandwich walls. Steel plates and pre-embedded bolts are used for connection to optimize force distribution, and caulking grooves are set for sealing.
It reduces material consumption, improves construction efficiency and hoisting stability, enhances structural stability and seismic performance, and extends the service life of connectors.
Smart Images

Figure CN223497344U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated housing technology, specifically to a fully prefabricated concrete box house. Background Technology
[0002] The prefabricated modular housing consists of modular units, which can be prefabricated in a factory and then assembled on-site to form the desired building. Due to its high efficiency, environmental friendliness, and sustainable utilization, it has broad development prospects and application value in the current market.
[0003] The existing container units are horizontally spliced together, and the walls at the splicing surfaces are relatively thick, which causes material waste and affects construction efficiency and the flexibility of container houses. Utility Model Content
[0004] The purpose of this utility model is to provide a fully prefabricated concrete box house, which includes several horizontally assembled individual box houses. Each individual box house includes a wall, so that there is a gap in the wall. After multiple individual box houses are assembled, the wall panel on one side of the adjacent individual box house wall can seal the gap, thereby reducing the wall thickness and material consumption while dividing the house, and solving the problem of multiple walls after the individual box houses are assembled in the prior art.
[0005] The objective of this utility model is mainly achieved through the following technical solutions:
[0006] The fully prefabricated concrete box house includes several individual box houses, which are horizontally spliced together in sequence. The outer walls of the individual box houses are provided with open surfaces, and two adjacent individual box houses can be horizontally spliced together to form at least one enclosed area.
[0007] Several horizontal connectors are provided at the joint of two adjacent single-unit container houses. The horizontal connectors connect the two adjacent single-unit container houses and can span across and be embedded in the two adjacent single-unit container houses.
[0008] Existing modular housing technology typically consists of a single, enclosed structure. This results in double-walled sections at the joints when multiple modular housing units are assembled, occupying significant space and increasing construction costs. This application addresses this issue by eliminating gaps in the walls of assembled modular housing units. By allowing adjacent modular housing units to have their wall panels completely sealed off after assembly, the wall thickness is reduced while simultaneously dividing the housing, thus minimizing material consumption.
[0009] Prefabricated container houses can save resources and reduce costs to some extent by reducing one side of the wall, but it is difficult to maintain balance when hoisting a container house with only one side of the wall.
[0010] After creating gaps in the walls, the center of gravity of a single modular unit shifts away from its geometric center, moving away from the gaps and causing instability during hoisting. This solution utilizes horizontal connectors to link several modular units into a single structure, redistributing the center of gravity of the overall structure. Since horizontally joining two adjacent modular units creates at least one enclosed area, only the outermost 0-2 modular units will have gaps on their outer surfaces. The resulting overall structure is large and heavy; therefore, the impact of the outer gaps on the center of gravity shift is far less than the impact of the individual modular unit gaps. This brings the center of gravity closer to the geometric center of the overall structure, facilitating stability during hoisting.
[0011] The unbalanced torque generated during hoisting causes the connectors to bear greater lateral forces and torques, resulting in a more complex and severe stress condition. This can lead to stress concentration, accelerated fatigue damage, and even connection failure, seriously affecting the safety and stability of the overall structure. This invention utilizes horizontal connectors to assemble multiple individual modular units into a single unit. By adjusting the center of gravity of the overall structure to be closer to the center, the stability of the overall structure is improved, reducing swaying and vibration during hoisting. This reduces fatigue damage to the horizontal connectors caused by dynamic loads, thereby ensuring the connection strength of the overall structure and the service life of the product.
[0012] Since it cannot be guaranteed that the center of gravity of the structural unit will be perfectly located at its geometric center during hoisting, this invention allows the horizontal connector to span two individual container houses. This disperses the load and reduces stress concentration. Embedding the connector into the individual container house makes the connection more secure, less prone to loosening or detachment, and adaptable to the design of individual container houses with gaps. This ensures good structural stability even after changes to the wall structure.
[0013] Furthermore, the horizontal connector includes a steel plate and several embedded bolts. The steel plate is in contact with the outer walls of the two adjacent single-unit container houses. The embedded bolts can penetrate the steel plate and enter the two adjacent single-unit container houses respectively. Each embedded bolt is fixedly connected to the single-unit container house.
[0014] Specifically, to enhance the overall structural stability, this invention uses steel plates to connect two individual container houses. Because steel plates possess high strength and rigidity, they can withstand significant loads and deformations. When connecting the two container houses, the steel plates effectively transfer and distribute the load, ensuring the overall stability and safety of the structure. Simultaneously, due to the corrosion resistance of steel, the impact of external environmental factors such as wind and rain on the connectors can be mitigated to some extent, extending their service life, improving the stability of the connection points, and reducing maintenance and replacement costs due to connector damage.
[0015] Furthermore, the single-unit container house is provided with a reserved groove, and the reserved grooves on two adjacent single-unit container houses are at the same height. The embedded bolt can press the steel plate into and abut against the reserved grooves on two adjacent single-unit container houses, and the two ends of the steel plate are respectively embedded in the reserved grooves on two adjacent single-unit container houses.
[0016] To enhance the strength and stability of the connection points, this invention ensures a tight fit between the steel plate and the wall of the modular housing. Through the tightening action of pre-embedded bolts, a robust connection is formed, capable of withstanding significant loads and deformations. This ensures a safe and reliable connection between the modular housing units and extends the service life of the connectors. Furthermore, the pre-reserved grooves also serve as positioning devices, facilitating the installation of the steel plate and pre-embedded bolts, improving construction efficiency, and ensuring the flatness of the wall surface.
[0017] Pre-embedded bolts are used to press the steel plate together, causing it to press against and embed into the pre-reserved groove, thus increasing the friction between the steel plate and the groove and ensuring the stability and tightness of the connection.
[0018] Furthermore, the single-unit container house is provided with a plurality of the reserved grooves, and the plurality of reserved grooves are evenly spaced;
[0019] The reserved grooves on two adjacent single-unit container houses are the same size.
[0020] To ensure a more uniform stress distribution on the assembled structure, the horizontal connectors are evenly distributed longitudinally along the joint between the two individual container houses. This allows the horizontal load on one container house to be evenly transferred to the other container house through the horizontal connectors, thereby ensuring the stability of the overall structure.
[0021] By connecting half of a steel plate to a single-unit container house, the forces between the walls can be evenly distributed and effectively transferred, enhancing the strength and stability of the connection area. Optimizing force distribution improves the overall structure's load-bearing capacity and seismic performance, ensuring safer and more reliable wall panel connections.
[0022] Furthermore, the outer wall of the single-unit container house is provided with a filling sandwich wall, and the filling sandwich wall and the empty surface are symmetrical about the central axis of the single-unit container house.
[0023] By using infill sandwich walls on the opposite side of the prefabricated container house without wall panels, the weight is reduced while providing excellent thermal insulation performance. Compared to concrete wall panels, infill sandwich walls are lighter and effectively balance the center of gravity of the container house during hoisting, ensuring the stability and safety of the hoisting operation. At the same time, the insulation material in the sandwich walls effectively reduces heat transfer, improving the thermal insulation effect of the container house.
[0024] Furthermore, the infilled sandwich wall includes a concrete wall and a sandwich wall. The concrete wall can wrap around the outer side of the sandwich wall. Reinforcing bars are laid inside the concrete wall. The reinforcing bars are U-shaped and their ends are all biased towards the sandwich wall.
[0025] Because the infilled sandwich wall is relatively light and has poor load-bearing capacity, the single-unit box house of this utility model needs to have a certain load-bearing capacity when used as a house. Therefore, the infilled sandwich wall is divided into concrete wall and sandwich wall. The concrete wall is used as a frame, and the sandwich wall is placed in the concrete frame structure. The concrete wall is used to bear the load, support and prevent deformation, while the sandwich wall is used to reduce weight and keep warm.
[0026] By designing the reinforcing bars within the concrete wall in a U-shape, the reinforcing bars at different locations on the outer perimeter of the sandwich wall can be stably connected by their bent ends, forming a relatively stable integral structure. This effectively enhances the tensile and shear resistance of the concrete wall. During hoisting and installation, and during normal support, the load-bearing capacity of the wall is ensured and the overall structural stability is improved, while achieving balance and insulation through the filling of the sandwich wall.
[0027] Furthermore, the surface at the joint of two adjacent modular units is provided with rectangular caulking grooves, and the caulking grooves of the two adjacent modular units completely cover the joint of the two adjacent modular units.
[0028] To reduce the risk of leakage at the joint between two adjacent modular units, a rectangular caulking groove is created on the surface of the joint. After installation, sealant is applied and the edges are sealed through the caulking groove to prevent cracking and leakage later. The caulking groove completely covers the joint between the two adjacent modular units, facilitating smooth and quick sealing of the joint later.
[0029] In summary, this utility model has the following advantages compared with the prior art:
[0030] 1. It includes several horizontally connected single-unit container houses, so that the walls of the single-unit container houses include the empty surface. When splicing, the wall panel of the adjacent single-unit container house can seal the empty surface, thereby reducing the wall thickness and material consumption while dividing the house.
[0031] 2. Set the wall on the side of the empty face as a filling sandwich wall and connect several individual container houses into a whole through horizontal connectors. This makes the center of gravity of the assembled container house after the empty face is set close to the geometric center, reducing swaying during hoisting and reducing damage to hoisting components. Attached Figure Description
[0032] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:
[0033] Figure 1 This is a schematic diagram of the overall structure of this application;
[0034] Figure 2 This is a structural schematic diagram of the infilled sandwich wall of this application;
[0035] Figure 3 This is a schematic diagram of the structure of the horizontal connector in this application;
[0036] Figure 4 This is a schematic diagram of the caulking groove of this application;
[0037] The names corresponding to the reference numerals in the attached drawings are as follows: 1. Top plate; 2. Infilled sandwich wall; 201. Concrete wall; 202. Sandwich wall; 3. Void surface; 4. Longitudinal connector; 5. Horizontal connector; 501. Steel plate; 502. Reserved groove; 503. Embedded bolt; 6. Caulking groove. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.
[0039] Example: Figures 1-4 As shown, this embodiment discloses a fully prefabricated concrete box house in the field of prefabricated housing technology, including several individual box houses, which are horizontally spliced together in sequence. The outer wall of each individual box house is provided with a gap surface 3, and two adjacent individual box houses can be horizontally spliced together to form at least one enclosed area.
[0040] Several horizontal connectors 5 are provided at the joint of two adjacent single-unit container houses. The horizontal connectors 5 connect the two adjacent single-unit container houses and can span across and be embedded in the two adjacent single-unit container houses.
[0041] Existing modular housing technology typically consists of a single, enclosed structure. This results in double-walled sections at the joints after multiple modular units are assembled, occupying significant space and increasing construction costs. This application addresses this issue by creating a gap 3 in the walls. After assembling multiple modular units, one wall panel from an adjacent modular unit can seal this gap 3, thereby reducing wall thickness and material consumption while dividing the housing.
[0042] Prefabricated container houses can save resources and reduce costs to some extent by reducing one side of the wall, but it is difficult to maintain balance when hoisting a container house with only one side of the wall.
[0043] After creating gaps (3) in the wall structure, the center of gravity of the individual modular units shifts away from the geometric center, moving away from gaps (3), causing instability during hoisting. This solution utilizes horizontal connectors (5) to connect several individual modular units into a single structure, redistributing the center of gravity of the overall structure. Since horizontally joining two adjacent modular units can form at least one enclosed area, only the outermost 0-2 modular units will have gaps (3) on their outer surfaces. The overall structure is large and heavy; therefore, the impact of the outer gaps (3) on the center of gravity shift is far less than the impact of the individual modular unit gaps (3) on the center of gravity. This allows the center of gravity to be closer to the geometric center of the overall structure, facilitating stability during hoisting.
[0044] The unbalanced torque generated during hoisting causes the connecting parts to bear greater lateral forces and torques, resulting in a more complex and severe stress situation. This can lead to stress concentration, accelerated fatigue damage, and even connection failure, seriously affecting the safety and stability of the overall structure. This invention utilizes horizontal connecting parts 5 to assemble multiple individual modular units into a single unit. By adjusting the center of gravity of the overall structure to be closer to the center, the stability of the overall structure is improved, reducing swaying and vibration during hoisting. This reduces fatigue damage to the horizontal connecting parts 5 caused by dynamic loads, thereby ensuring the connection strength of the overall structure and the service life of the product.
[0045] Since it cannot be guaranteed that the center of gravity of the overall structure will be located exactly at the geometric center during hoisting, this invention allows the horizontal connector 5 to span two individual container houses. This allows the load to be distributed through the connector, reducing stress concentration. Embedding the connector into the individual container house makes the connection more secure and less prone to loosening or falling off. This design can accommodate individual container houses with missing surfaces 3, ensuring good structural stability even after changes to the wall structure.
[0046] Furthermore, the horizontal connector 5 includes a steel plate 501 and a plurality of pre-embedded bolts 503. The steel plate 501 is in contact with the outer walls of the two adjacent single-unit container houses. The plurality of pre-embedded bolts 503 can penetrate the steel plate 501 and enter the two adjacent single-unit container houses respectively. Each pre-embedded bolt 503 is fixedly connected to the single-unit container house.
[0047] Specifically, to enhance the overall structural stability, this invention uses steel plate 501 to connect two individual container houses. Because steel plate 501 itself has high strength and rigidity, it can withstand large loads and deformations. When connecting the two individual container houses, steel plate 501 can effectively transfer and distribute the load, ensuring the overall stability and safety of the structure. At the same time, because steel is inherently corrosion-resistant, it can, to a certain extent, reduce the impact of external environmental factors such as wind and rain on the connectors, extend the service life of the connectors, improve the stability of the connection points, and reduce maintenance and replacement costs due to connector damage.
[0048] Furthermore, the single-unit container house is provided with a reserved groove 502, and the reserved grooves 502 on two adjacent single-unit container houses are at the same height. The pre-embedded bolts 503 can press the steel plate 501 into the reserved grooves 502 on two adjacent single-unit container houses, and the two ends of the steel plate 501 are respectively embedded in the reserved grooves 502 on two adjacent single-unit container houses.
[0049] To enhance the strength and stability of the connection, this invention ensures that the steel plate 501 is tightly fitted to the wall of the single-unit container house. Through the fastening action of the pre-embedded bolts 503, a robust connection is formed, capable of withstanding larger loads and deformations. This ensures the safe and reliable connection between the container houses and extends the service life of the connectors. Furthermore, the pre-reserved groove 502 also serves as a positioning device, facilitating the installation of the steel plate 501 and the pre-embedded bolts 503, improving construction efficiency, and ensuring the flatness of the wall surface.
[0050] The pre-embedded bolts 503 are used to press the steel plate 501 together, causing the steel plate 501 to press firmly against and embed into the reserved groove 502, thereby increasing the friction between the steel plate 501 and the reserved groove 502 and ensuring the stability and tightness of the connection.
[0051] Furthermore, the single-unit container house is provided with a plurality of the reserved grooves 502, and the plurality of reserved grooves 502 are evenly spaced;
[0052] The reserved grooves 502 on two adjacent single-unit container houses are the same size.
[0053] To ensure a more uniform stress distribution on the assembled structure, the horizontal connector 5 is evenly distributed longitudinally along the joint between the two individual container houses. This allows the horizontal load on one container house to be evenly transferred to the other container house through the horizontal connector 5, thereby ensuring the stability of the overall structure.
[0054] By connecting half of a 501 steel plate to a single-unit container house, the forces between the walls can be evenly distributed and effectively transferred, enhancing the strength and stability of the connection area. Optimizing force distribution improves the overall structure's load-bearing capacity and seismic performance, ensuring safer and more reliable wall panel connections.
[0055] Furthermore, the outer wall of the single-unit container house is provided with a filling sandwich wall 2, and the filling sandwich wall 2 and the empty surface 3 are symmetrical about the central axis of the single-unit container house.
[0056] The opposite side of the prefabricated container house without wall panels is designated as a sandwich wall 2, reducing its weight while providing excellent thermal insulation. Compared to concrete wall panels, the sandwich wall 2 is lighter, effectively balancing the center of gravity of the container house during hoisting, ensuring the stability and safety of the hoisting operation. Simultaneously, the insulation material in the sandwich wall effectively reduces heat transfer, improving the thermal insulation performance of the container house.
[0057] Furthermore, the infilled sandwich wall 2 includes a concrete wall 201 and a sandwich wall 202. The concrete wall 201 can wrap around the outer side of the sandwich wall 202. Reinforcing bars are laid inside the concrete wall 201. The reinforcing bars are U-shaped and the ends of the reinforcing bars are all biased towards the sandwich wall 202.
[0058] Because the infilled sandwich wall 2 is relatively lightweight and has poor load-bearing capacity, the single-unit container house of this utility model needs to have a certain load-bearing capacity when used as a house. Therefore, the infilled sandwich wall 2 is divided into a concrete wall 201 and a sandwich wall 202. The concrete wall 201 serves as a frame, and the sandwich wall 202 is placed in the concrete frame structure. The concrete wall 201 bears the load, supports, and prevents deformation, while the sandwich wall 202 reduces weight and provides insulation.
[0059] The reinforcing bars within the concrete wall 201 are designed in a U-shape, allowing the reinforcing bars at different locations on the outer perimeter of the sandwich wall 202 to be stably connected by their bent ends, forming a relatively stable overall structure and effectively enhancing the tensile and shear resistance of the concrete wall 201. During hoisting and installation, and during normal support, the load-bearing capacity of the wall is ensured and the overall structural stability is improved while achieving balance and insulation through the filling of the sandwich wall 2. As one possible implementation scheme, the concrete wall 201 includes concrete columns, concrete beams, and concrete slabs, which are combined to form a frame structure for a single-unit box-type house. The entire plane enclosed by the frame structure is filled with the sandwich wall 202, resulting in a complete single-unit box-type house without any gaps in the surface 3. If the flat surface enclosed by part of the frame structure is not filled with the sandwich wall 202, multiple single-unit box-type houses can be assembled to form more houses of different sizes and spatial distributions, creating a versatile assembly space that can be freely combined.
[0060] Furthermore, the surface at the joint of two adjacent modular units is provided with rectangular caulking grooves 6, and the caulking grooves 6 of the two adjacent modular units completely cover the joint of the two adjacent modular units.
[0061] To reduce the risk of leakage at the joint between two adjacent modular units, a rectangular caulking groove 6 is provided on the surface of the joint. After installation, sealant and edge-sealing treatments are applied to the joint between the two modular units through the caulking groove 6 to prevent cracking and leakage later. The caulking groove 6 completely covers the joint between the two adjacent modular units, facilitating smooth and quick sealing of the joint later. In specific implementation of the above solution:
[0062] It includes several individual container houses that are horizontally assembled sequentially, with adjacent individual container houses connected by horizontal connectors 5.
[0063] The single-unit container house includes a top panel 1, a front wall panel, a rear wall panel, and a side wall panel. The front wall panel, rear wall panel, and side wall panel can be combined to form a wall with a gap 3 on one side. Specifically, the front wall panel has door and window openings, and the rear wall panel has window openings, allowing for ventilation through the doors and windows of the front and rear wall panels.
[0064] The side wall panels are set as infilled sandwich walls 2, so that the empty surface 3 and the infilled sandwich walls 2 are symmetrical and the center of gravity of the whole is balanced.
[0065] The roof panel 1 and the wall panel of the single-unit container house are connected by longitudinal connectors 4 to ensure the overall structural stability of the single-unit container house.
[0066] To address the issue of non-load-bearing infill walls, the wall panels (side walls, front walls, and rear walls) comprise concrete walls 201 and sandwich walls 202. Concrete walls 201 act as a frame, providing support and load-bearing capacity. Sandwich walls 202 are embedded within the concrete walls 201, providing insulation and weight reduction. During construction, the sandwich walls 202 and the concrete wall frame are cast integrally in one piece, enabling rapid and efficient production. After several individual modular units are horizontally assembled, the resulting external gaps 3 are covered by infill sandwich walls 2, as described for the side walls, ensuring the integrity of the assembled modular unit structure.
[0067] Specifically, the horizontal connector 5 includes a steel plate 501 and pre-embedded bolts 503. The steel plate 501 is rectangular, with the center line of the rectangular steel plate 501 aligned with the splicing seam of the two adjacent single-unit box houses. The two ends of the steel plate are respectively attached to the surfaces of the two adjacent single-unit box houses. Two pre-embedded bolts 503 are used to penetrate the steel plate 501 and drive into the wall panel, and are fixedly connected to the wall panel.
[0068] A pre-reserved groove 502 is provided on the surface of the single-unit container house to accommodate the horizontal connector 5. At the same time, to facilitate the treatment of connection gaps, a recessed caulking groove 6 is provided on the surface of all connection gaps. The caulking groove 6 is rectangular in shape to facilitate the sealing treatment of the joints after connection.
[0069] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A fully prefabricated concrete prefabricated box house, comprising several individual box houses, wherein the several individual box houses are horizontally spliced together sequentially, characterized in that: The outer wall of the single-unit container house is provided with a gap (3), and two adjacent single-unit container houses can be horizontally spliced to form at least one enclosed area. Several horizontal connectors (5) are provided at the joint of two adjacent single-unit container houses. The horizontal connectors (5) connect the two adjacent single-unit container houses and can span and be embedded in the two adjacent single-unit container houses.
2. The fully prefabricated concrete box house as described in claim 1, characterized in that: The horizontal connector (5) includes a steel plate (501) and a number of pre-embedded bolts (503). The steel plate (501) is in contact with the outer walls of the two adjacent single-unit box houses. The pre-embedded bolts (503) can penetrate the steel plate (501) and enter the two adjacent single-unit box houses respectively. Each pre-embedded bolt (503) is fixedly connected to the single-unit box house.
3. The fully prefabricated concrete box house as described in claim 2, characterized in that: The single-unit container house is provided with a reserved groove (502). The reserved grooves (502) on two adjacent single-unit container houses are at the same height. The embedded bolt (503) can press the steel plate (501) into the reserved groove (502) on two adjacent single-unit container houses and press it against the reserved groove (502) on two adjacent single-unit container houses. The two ends of the steel plate (501) are respectively embedded in the reserved groove (502) on two adjacent single-unit container houses.
4. The fully prefabricated concrete box house as described in claim 3, characterized in that: The single-unit container house is provided with a plurality of the reserved grooves (502), and the plurality of reserved grooves (502) are evenly spaced; The reserved grooves (502) on two adjacent single-unit container houses are the same size.
5. The fully prefabricated concrete box house as described in claim 1, characterized in that: The outer wall of the single-unit container house is provided with a filling sandwich wall (2), and the filling sandwich wall (2) and the empty surface (3) are symmetrical about the central axis of the single-unit container house.
6. The fully prefabricated concrete box house as described in claim 5, characterized in that: The infilled sandwich wall (2) includes a concrete wall (201) and a sandwich wall (202). The concrete wall (201) can wrap around the outer side of the sandwich wall (202). Reinforcing bars are laid inside the concrete wall (201). The reinforcing bars are U-shaped and the ends of the reinforcing bars are biased towards the sandwich wall (202).
7. The fully prefabricated concrete box house as described in claim 1, characterized in that: The surface of the joint between two adjacent single-unit container houses is provided with a rectangular caulking groove (6), and the caulking groove (6) of the two adjacent single-unit container houses completely covers the joint between the two adjacent single-unit container houses.