A full assembly type concrete structure box house connecting joint and installation method thereof

Abstract

This invention provides a connection node and installation method for a fully prefabricated concrete box-type house. The connection node consists of horizontal and vertical installation nodes. The horizontal installation node includes a toothed plate located between the upper and lower structural wall panels, several vertically embedded screws at the center of the toothed plate width, and matching bolts. The vertical installation node includes a reserved slot B located on the inner side of the left and right wall panels, a screw through hole between the reserved slot B and the wall panel gap, unequal thickness steel plate embedded parts on the outer side of the wall panel around the screw through hole, a V-shaped joint pressure-bearing clamp embedded between the unequal thickness steel plate embedded parts, a connecting screw passing through the screw through hole and the V-shaped joint pressure-bearing clamp, and a matching nut B. This application enables fully dry installation, achieving rapid connection through simple bolt tightening. The vertical installation node ensures the integrity of the prefabricated box-type house units under seismic action, effectively improving the safety performance of the box-type house.

Description

Technical Field

[0001] This invention relates to the field of prefabricated concrete box house technology, specifically to a connection node and installation method for a fully prefabricated concrete box house. Background Technology

[0002] In recent years, with changes in the global climate environment, the frequency of natural disasters has been increasing. In particular, since this summer, due to prolonged and widespread rainfall, large-scale floods have occurred in mountainous areas, causing widespread destruction of houses and damage to infrastructure for production and daily life. This has greatly affected the normal production and life of local residents, making it imperative to address their housing needs.

[0003] Generally, to address the housing needs of large-scale residents, standard shipping containers can be used as the main structure of houses. Doors and windows are then installed around the container, along with essential living facilities, to provide temporary shelter for local residents. However, these temporary container houses often lack wind and earthquake resistance, and their comfort and functionality are poor. Furthermore, container houses are mostly composed of steel structures, making corrosion resistance and durability a major drawback. The emergence of fully prefabricated concrete box houses perfectly solves these problems. They offer the same comfort and functionality as cast-in-place concrete structures, and perform well in terms of earthquake resistance, wind resistance, and durability. According to known technical solutions, these concrete box houses mostly use prefabricated shear walls for connection between floors. The lower structure has pre-reserved reinforcing bars, and the upper shear wall has pre-reserved reinforcing sleeves. Horizontal joints are connected by grouting and sleeve grouting. Gaps between box house units are mostly filled with mortar.

[0004] In publicly available technical solutions, the horizontal installation nodes of prefabricated concrete box-type houses involve pre-reserved vertical reinforcing bars in the lower structure, which are then inserted into the steel sleeves of the upper precast shear wall. To achieve grouting connection of the sleeves, high-strength grouting material needs to be prepared, requiring grouting materials and corresponding equipment. Furthermore, to prevent grout loss from the joints during grouting, sealing grout or overall grouting at the bottom of the precast wall panels is necessary at the horizontal joints, again requiring grouting materials and mixing equipment. The construction process of sleeve grouting connection is complex, requiring significant upfront resource investment. Since subsequent work can only proceed after grouting reaches a certain strength, on-site construction time is also lengthy. More importantly, the grouting material's strength development requires specific temperature conditions, making it unsuitable for winter construction. For vertical installation nodes of box-type houses, sealing methods are mostly used for structural connection, which also requires extensive wet work, resulting in poor joint seismic performance and negatively impacting overall structural safety. Summary of the Invention

[0005] To address the problems of existing solutions, this invention proposes a fully dry installation node and installation method for prefabricated concrete box houses, which mainly solves two problems: firstly, it integrates and simplifies the connection nodes of the box houses, improves the node installation efficiency, reduces on-site wet work, and shortens the construction period of the houses; secondly, it strengthens the structural integrity between the box house units and improves the seismic performance of the box houses.

[0006] Based on the above problems, the technical solution proposed in this invention is a fully prefabricated concrete box house connection node, which consists of a horizontal installation node and a vertical installation node. The horizontal installation node includes a toothed plate located at the bottom of the upper structure wall panel and the top of the lower structure wall panel, several vertical pre-embedded screws for connecting the upper and lower structures at the middle position of the toothed plate width, and a matching nut A.

[0007] The vertical installation nodes include a reserved slot B located on the inner side of the left and right wall panels, a screw through hole between the reserved slot B and the wall panel gap, unequal thickness steel plate embedded parts located around the screw through hole on the outer side of the wall panel, a V-shaped joint pressure-bearing clamp embedded between the unequal thickness steel plate embedded parts, a connecting screw rod passing through the screw through hole and the V-shaped joint pressure-bearing clamp, and a matching nut B.

[0008] The toothed plate is parallel to the direction of the wall panel, and the toothed plate is made of pre-embedded steel plate with a depth of 3~5mm.

[0009] Furthermore, multiple vertical pre-embedded bolts are spaced apart along the length direction at the center of the toothed plate width. The bottom of the vertical pre-embedded bolts is anchored in the bottom foundation or the lower structural wall panel, and a certain length of the top is exposed and the surface is threaded.

[0010] Furthermore, a reserved slot A is provided on the interior side of the upper structural wall panel, and a reserved screw hole with a diameter larger than the diameter of the reserved screw is provided on the upper structural wall panel at the position of the vertical embedded screw of the lower supporting structure. After the reserved screw hole extends to a certain height, it connects with the reserved slot A.

[0011] Among them, the central hole for the threaded rod is reserved in the embedded part of the steel plate of unequal thickness, and the middle of the V-shaped joint pressure clamp along the length direction is provided with an oblong hole with an opening larger than the diameter of the connecting threaded rod.

[0012] Furthermore, the unequal-thickness steel plate embedded part is thicker at the bottom and thinner at the top, and the vertical overall surface is sloping. The inclination angle of the two sides of the V-shaped steel plate is consistent with the inclination angle of the unequal-thickness steel plate embedded part pre-embedded on the outside of the wall panel.

[0013] Both sides of the V-shaped joint pressure clamp are sandblasted.

[0014] The through holes for the bolts between the left and right structural wall panels are projected at an angle of ±45° in the elevation view and as an arc shape in the horizontal view. The connecting bolts between the left and right wall panels are arc-shaped steel bolts.

[0015] The installation method for connection nodes of fully prefabricated concrete box-type houses includes the following steps:

[0016] (1) Check and correct the vertical pre-embedded bolts on the top of the lower-level box house, and confirm that the diameter, spacing, positioning and extension length of the vertical pre-embedded bolts meet the connection requirements. At the same time, the toothed plate on the top surface of the lower-level box house should be cleaned.

[0017] Remove debris to ensure the surface of the toothed plate is clean;

[0018] (2) Use lifting equipment to lift the precast concrete box house, lift it to the space above the installation work surface, align the reserved screw holes at the bottom of the wall with the vertical embedded screws of the lower structure, and safely lower it until all the vertical embedded screws are inserted into the reserved screw holes at the bottom of the wall.

[0019] (3) Place the corresponding nut A in the reserved slot A at the bottom of the wall and tighten the nut A using equipment;

[0020] (4) Install the next adjacent precast concrete box house in sequence;

[0021] (5) Check whether the reserved holes of the screw rods of two adjacent precast concrete box houses are aligned, and pass the arc-shaped connecting screw rods through the reserved slots B of the adjacent wall panels respectively, and perform initial tightening of the connecting screw rods to ensure that the connecting screw rods do not fall off. Complete the drilling and initial tightening of other screw rods in sequence.

[0022] (6) At the gap between two adjacent box-type housing units, at each connecting screw position, according to the top...

[0023] Insert the V-shaped joint pressure-bearing clamp downwards, ensuring that the elongated hole of the V-shaped joint pressure-bearing clamp is engaged around the connecting screw, and then hammer the V-shaped joint pressure-bearing clamp downwards to ensure that the V-shaped joint pressure-bearing clamp is fully embedded in the gap.

[0024] (7) Tighten the nuts B on both sides of the same screw of two adjacent precast concrete box houses in sequence to complete the connection between the units;

[0025] (8) Following the above steps, the installation of the precast concrete box house unit can be completed.

[0026] Advantages and beneficial effects of the present invention:

[0027] The prefabricated concrete box house installation connection node proposed in this invention enables fully dry installation operations. Quick connections can be achieved through simple bolt tightening, eliminating the need for specialized equipment and energy supply required for welding connections, and avoiding the on-site mixing and grouting process and the waiting time for strength to build up. Furthermore, the vertical installation node proposed in this invention, with its unequal-thickness steel plate embedded parts between the left and right structural wall panel gaps and V-shaped pressure-bearing clamps in conjunction with connecting bolts, ensures the integrity of the prefabricated box house units under normal use and seismic loads, effectively improving the safety performance of the box house. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the horizontally installed node in this invention.

[0029] Figure 2 This is a schematic diagram of another form of horizontally mounted node in this invention.

[0030] Figure 3 yes Figure 2 A magnified structural diagram of part A in the middle.

[0031] Figure 4 This is a structural schematic diagram of the vertically installed node in this invention.

[0032] Figure 5 This is a structural schematic diagram of another form of vertical mounting node in this invention;

[0033] Wherein: 1-1, upper structural wall panel; 2-1, lower structural wall panel; 3-1, lower toothed groove plate; 4-1, upper toothed groove plate; 5-1, vertical embedded screw rod; 6-1, nut A; 7-1, reserved slot A; 8-1, reserved screw rod hole; 1-2, left structural wall panel; 2-2, right structural wall panel; 3-2, steel plate embedded part of unequal thickness; 4-2, V-shaped joint pressure-bearing clamp; 5-2, connecting screw rod; 6-2, nut B; 7-2, reserved slot B; 8-2, screw rod through hole; 9-2, screw rod through hole; 10-2, open oblong hole. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0035] A connection node for a fully prefabricated concrete box-type house consists of horizontal and vertical installation nodes, such as... Figure 1 , Figure 2 As shown, the horizontal installation node includes a toothed plate located at the bottom of the upper structural wall panel 1-1 and the top of the lower structural wall panel 2-1, several vertically embedded bolts 5-1 at the center of the toothed plate width for connecting the upper and lower structures, and matching nuts A 6-1; as shown Figure 4 , Figure 5 As shown, the vertical installation node includes a reserved slot B 7-2 located inside the left structural wall panel 1-2 and the right structural wall panel 2-2, a screw through hole 8-2 between the reserved slot B 7-2 and the gap between the left structural wall panel 1-2 and the right structural wall panel 2-2, an unequal thickness steel plate embedded part 3-2 located around the screw through hole 8-2 on the outside of the wall panel, a V-shaped joint pressure-bearing clamp 4-2 embedded between the unequal thickness steel plate embedded parts 3-2, a connecting screw 5-2 passing through the screw through hole 8-2 and the V-shaped joint pressure-bearing clamp 4-2, and a matching nut B 6-2.

[0036] Among them, for the upper structural wall panel 1-1, an upper toothed plate 4-1 is placed at the bottom along the wall direction. The lower supporting structure can be the bottom foundation or the lower structural wall panel 2-1. A corresponding lower toothed plate 3-1 is set at the top of the wall within the projection range. The toothed plate is made of pre-embedded steel plate with a depth of 3~5mm, which provides sufficient rough surface for the upper and lower structures, thereby playing a role in interlayer shear resistance.

[0037] In this design, multiple vertically embedded screws 5-1 are spaced along the length of the toothed plate at the center of its width. The bottom of each vertically embedded screw 5-1 is anchored in the lower support structure, while the top protrudes to a certain length and has threads on its surface. A pre-reserved slot A 7-1 is provided on the interior side of the upper structural wall panel 1-1. A pre-reserved screw hole 8-1 with a diameter larger than that of the vertically embedded screw 5-1 is also provided on the upper structural wall panel 1-1 at the position corresponding to the vertically embedded screw 5-1 in the lower support structure. The pre-reserved screw hole 8-1 extends to a certain height and connects to the pre-reserved slot A 7-1, achieving the connection with a nut A 6-1. In this node, the vertically embedded screws 5-1 and the nut A 6-1 serve to connect the upper and lower structures.

[0038] In the vertical nodes, the unequal-thickness steel plate embedded part 3-2 has a pre-reserved threaded rod through hole 9-2 in the center, and the V-shaped joint pressure-bearing clamp 4-2 has an oblong hole 10-2 with a diameter larger than that of the connecting threaded rod 5-2 in the middle of its length direction. The unequal-thickness steel plate embedded part 3-2 is thicker at the bottom and thinner at the top, and the vertical surface is sloping. The inclination angles of the two sides of the V-shaped joint pressure-bearing clamp 4-2 are consistent with the inclination angle of the unequal-thickness steel plate embedded part 3-2 pre-embedded on the outer side of the wall panel.

[0039] Both sides of the V-shaped joint pressure clamp 4-2 are sandblasted to improve the friction system.

[0040] The through-hole 8-2 between the left structural wall panel 1-2 and the right structural wall panel 2-2 is projected at an angle of ±45° in the elevation view and as an arc shape in the horizontal view. The connecting bolt 5-2 between the left structural wall panel 1-2 and the right structural wall panel 2-2 is an arc-shaped steel bolt. The external dimensions meet the requirement of the through-hole 8-2 between the wall panels, and its length should meet the requirement of connecting the two wall panels and connecting them through the nut B6-2.

[0041] In this node, the connecting bolt 5-2 serves to tie the shear wall panels of the prefabricated box-shaped houses on both sides, thereby increasing the overall structural integrity. At the same time, during an earthquake, it plays a role in resisting the shear stress between units, reducing the deformation between units, and improving the seismic performance of the structure. The V-shaped joint bearing clamp 4-2 mainly serves to tighten the gap between units, resist the compressive stress brought by the connecting bolt 5-2 to the wall panel, and avoid unnecessary internal stress between the wall panels.

[0042] The installation method for connection nodes of fully prefabricated concrete box-type houses includes the following steps:

[0043] (1) Check and correct the vertical pre-embedded screw 5-1 on the top of the lower box house, and confirm that the diameter, spacing, positioning and extension length of the vertical pre-embedded screw 5-1 meet the connection requirements. At the same time, clean up the debris on the toothed plate on the top surface of the lower box house to ensure that the toothed plate surface is clean.

[0044] (2) Use lifting equipment to lift the precast concrete box house and transport it to the installation work surface. Align the pre-reserved screw hole 8-1 at the bottom of the wall with the vertical pre-embedded screw 5-1 of the lower structural wall panel 2-1, and safely lower it until the vertical pre-embedded screw 5-1 is fully inserted into the pre-reserved screw hole 8-1 at the bottom of the wall.

[0045] (3) Place the corresponding nut A6-1 in the reserved slot A7-1 at the bottom of the wall, and tighten the nut A6-1 using equipment;

[0046] (4) Install the next adjacent precast concrete box house in sequence;

[0047] (5) Check whether the reserved holes of the screw rods of two adjacent precast concrete box houses are aligned, and pass the arc-shaped connecting screw rod 5-2 through the screw rod through hole 8-2 of the adjacent wall panel respectively, and perform initial tightening of the connecting screw rod 5-2 to ensure that the connecting screw rod 5-2 does not fall off. Complete the drilling and initial tightening of other screw rods in sequence.

[0048] (6) At the gap between two adjacent box-shaped units, insert the V-shaped joint bearing clamp 4-2 from top to bottom at each connecting screw 5-2 position, ensuring that the opening sub-circular hole 10-2 of the V-shaped joint bearing clamp 4-2 is locked around the connecting screw 5-2, and give the V-shaped joint bearing clamp 4-2 a certain downward hammering to ensure that the V-shaped joint bearing clamp 4-2 is completely embedded in the gap;

[0049] (7) Tighten the nuts B6-2 on both sides of the same connecting screw 5-2 of two adjacent precast concrete box houses in sequence to complete the connection between the units;

[0050] (8) Following the above steps, the installation of the precast concrete box house unit can be completed.

[0051] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A connection node for a fully prefabricated concrete box-type house, characterized in that: It consists of horizontal installation nodes and vertical installation nodes. The horizontal installation nodes include toothed plates located at the bottom of the upper structure wall panel and the top of the lower structure wall panel, several vertical pre-embedded screws for connecting the upper and lower structures at the middle position of the toothed plate width, and matching nuts A. The vertical installation nodes include the reserved slot B located on the inner side of the left and right wall panels, the screw through hole between the reserved slot B and the wall panel gap, the unequal thickness steel plate embedded parts located around the screw through hole on the outer side of the wall panel, the V-shaped joint pressure-bearing clamp embedded between the unequal thickness steel plate embedded parts, the connecting screw rod passing through the screw through hole and the V-shaped joint pressure-bearing clamp, and the matching nut B; The embedded steel plate of unequal thickness has a pre-reserved through hole for the screw rod in the center, and the V-shaped joint pressure clamp has an oblong hole with a diameter larger than that of the connecting screw rod in the middle of its length direction; The unequal-thickness steel plate embedded part is thicker at the bottom and thinner at the top, with a vertically sloping surface. The inclination angle of the two sides of the V-shaped steel plate is consistent with the inclination angle of the unequal-thickness steel plate embedded part pre-embedded on the outside of the wall panel.

2. The connection node of the fully prefabricated concrete box-type house according to claim 1, characterized in that: The toothed plate is parallel to the direction of the wall panel, and the toothed plate is made of pre-embedded steel plate with a depth of 3~5mm.

3. The connection node of the fully prefabricated concrete structure box house according to claim 2, characterized in that: Multiple vertical embedded bolts are installed at intervals along the length of the toothed plate at the center of its width. The bottom of the vertical embedded bolts is anchored in the bottom foundation or the lower structural wall panel, and a certain length of the top is exposed with threads on the surface.

4. The connection node of the fully prefabricated concrete box-type house according to claim 3, characterized in that: A pre-reserved slot A is provided on the indoor side of the upper structural wall panel, and a pre-reserved screw hole with a diameter larger than the diameter of the pre-embedded screw is provided on the upper structural wall panel at the position of the vertical pre-embedded screw of the lower supporting structure. The pre-reserved screw hole extends to a certain height and connects with the pre-reserved slot A.

5. The connection node of the fully prefabricated concrete box-type house according to claim 4, characterized in that: Both sides of the V-shaped joint pressure clamp are sandblasted.

6. The connection node of the fully prefabricated concrete box-type house according to claim 5, characterized in that: The through holes for the bolts between the left and right wall panels are projected at an angle of ±45° in the elevation view and as an arc shape in the horizontal view. The connecting bolts between the left and right wall panels are arc-shaped steel bolts.

7. The installation method for the connection node of the fully prefabricated concrete box-type house according to claim 6, characterized in that: Includes the following steps: (1) Check and correct the vertical pre-embedded screws on the top of the lower box house, and confirm that the diameter, spacing, positioning and extension length of the vertical pre-embedded screws meet the connection requirements. At the same time, clean up the debris on the toothed plate on the top surface of the lower box house to ensure that the toothed plate surface is clean. (2) Use lifting equipment to lift the precast concrete box house, lift it to the space above the installation work surface, align the reserved screw holes at the bottom of the wall with the vertical embedded screws of the lower structure, and safely lower it until all the vertical embedded screws are inserted into the reserved screw holes at the bottom of the wall. (3) Place the corresponding nut A in the reserved slot A at the bottom of the wall and tighten the nut A using equipment; (4) Install the next adjacent precast concrete box house in sequence; (5) Check whether the reserved holes of the screw rods of two adjacent precast concrete box houses are aligned, and pass the arc-shaped connecting screw rods through the reserved slots B of the adjacent wall panels respectively, and perform initial tightening of the connecting screw rods to ensure that the connecting screw rods do not fall off. Complete the drilling and initial tightening of other screw rods in sequence. (6) At the gap between two adjacent box-shaped units, insert a V-shaped joint pressure-bearing clamp at each connecting screw position in a top-to-bottom manner, ensuring that the elongated hole of the V-shaped joint pressure-bearing clamp is locked around the connecting screw, and give the V-shaped joint pressure-bearing clamp a certain downward hammering to ensure that the V-shaped joint pressure-bearing clamp is fully embedded in the gap. (7) Tighten the nuts B on both sides of the same screw of two adjacent precast concrete box houses in sequence to complete the connection between the units; (8) Following the above steps, the installation of the precast concrete box house unit can be completed.

Images