A prefabricated caisson and its assembly connection structure

Abstract

This utility model discloses a precast caisson and its assembly connection structure, which can flexibly and stably support the precast slab according to the pipe layout inside the precast caisson, reducing the construction difficulty of the precast slab and the positioning and installation difficulty of the precast caisson, and effectively connecting the precast caisson with the surrounding structure. The precast caisson includes a first lower plate, a second lower plate, and a connecting section. The first lower plate is located at the top of the connecting section, and the second lower plate is located at the bottom of the connecting section. The first lower plate and the second lower plate extend in opposite directions. The edge of the second lower plate is provided with a circumferential retaining wall. The retaining wall, the second lower plate, and the connecting section form the caisson. The top of the second lower plate is provided with multiple bases for supporting the precast slab. Threaded sleeves for connecting with threaded supports are embedded in the bases. The assembly connection structure of the precast caisson includes the aforementioned precast caisson, aluminum mold, and support device for supporting the precast caisson.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a prefabricated caisson and its assembly connection structure. Background Technology

[0002] In building construction, bathrooms are usually constructed using precast composite slabs or precast caissons. Precast caissons are widely used due to their advantages such as convenient construction, the ability to lay pipes on the same floor, and lower noise levels during subsequent use. However, the following problems still exist in the manufacturing, installation, and use of precast caissons: During manufacturing, precast caissons are prone to demolding difficulties; during installation, the hoisting and positioning of precast caissons is difficult, requiring multiple adjustments to ensure proper integration between the precast caisson and surrounding structures. Improper connections between the precast caisson and surrounding structures can affect its stability and lead to water seepage problems during subsequent use; after pipes are laid inside the precast caisson, it is common practice to fill it with expanded clay aggregate to absorb water seeping into the caisson or to install brick structures to support the precast slabs, thus suspending the caisson. When a large amount of water seeps into the caisson, the expanded clay aggregate cannot effectively absorb the water, resulting in water seepage. When the precast caisson is suspended, the complex piping inside makes it difficult to form effective brick supports, increasing the difficulty of constructing the precast slabs after pipe laying. Utility Model Content

[0003] One of the objectives of this utility model is, at least, to address the problems existing in the prior art by providing a prefabricated caisson and its assembly connection structure. After the prefabricated caisson is installed, it can flexibly and stably support the prefabricated slab according to the pipe layout inside the prefabricated caisson, reducing the construction difficulty of the prefabricated slab and the difficulty of positioning and installing the prefabricated caisson, thus enabling the prefabricated caisson to be effectively connected with the surrounding structure.

[0004] To achieve the above objectives, the technical solution adopted by this utility model includes the following aspects.

[0005] A precast caisson includes: a first lowered plate, a second lowered plate, and a connecting section. The first lowered plate is disposed at the top of the connecting section, and the second lowered plate is disposed at the bottom of the connecting section. The first lowered plate and the second lowered plate extend in opposite directions. A circumferential retaining wall is provided on the edge of the second lowered plate. The retaining wall, the second lowered plate, and the connecting section form a caisson. A plurality of bases for supporting the precast slab are provided at the top of the second lowered plate. A threaded sleeve for connecting with a threaded support is embedded in the base.

[0006] Preferably, one or more pipe waterstops are pre-embedded on the second drop plate, and the pipe waterstops are fixed and / or adjustable PVC waterstops.

[0007] Preferably, the second drop plate is further provided with a water collection and sealing joint, which is connected to one of the pipe sealing joints through a drainage pipe, and the drainage pipe is pre-embedded in the second drop plate.

[0008] Preferably, the first lowering plate is provided with a confluence channel for introducing seepage water into the caisson.

[0009] Preferably, a set of lifting rings is pre-embedded on the first and second lowering plates respectively, and the lifting rings on the first and second lowering plates are coaxially arranged.

[0010] Preferably, a first connecting flange is provided on the side of the first lowering plate and / or a second connecting flange is provided on the outer side of the reverse curb.

[0011] Preferably, the second lower plate is chamfered circumferentially, and the surface of the connecting section away from the second lower plate is inclined.

[0012] Preferably, the precast caisson is a reinforced concrete structure, and the precast caisson is provided with top reinforcement and bottom reinforcement. The top reinforcement and bottom reinforcement extend out of the precast caisson respectively. The part of the top reinforcement extending out of the first drop plate and the connecting section bends downward, and the part of the top reinforcement extending out of the second drop plate and the connecting section bends upward.

[0013] Preferably, the bottom of the second lowering plate is provided with one or more parallel positioning strips.

[0014] An assembly and connection structure for a precast caisson includes the aforementioned precast caisson, a support device, and an aluminum mold. The aluminum mold is used to construct the casting space for cast-in-place walls and beams, and also to support the precast caisson. The support device includes a support column, and a support member is provided on the top of the support column. The support column and the support member are detachably connected. The support member has a U-shaped cross-section, and multiple support columns are arranged along the length of the support member. The width of the U-shaped groove of the support member is adapted to the width of the positioning strip.

[0015] In summary, by adopting the above technical solution, this utility model has at least the following beneficial effects: By setting multiple bases for supporting the precast slabs on the second lowering plate of the precast caisson, with threaded sleeves embedded in the bases, and after installing drainage pipes inside the precast caisson, threaded supports can be connected to the corresponding bases according to the arrangement of the drainage pipes, so that the threaded supports can stably support the precast slabs. The bases and threaded supports reduce the floor area occupied in the precast caisson. During the process of setting up the elevated layer inside the precast caisson, the degree of interference of the drainage pipes with the bases supporting the precast slabs is reduced.

[0016] By pre-embedding a water-collecting stop joint and a pipe stop joint in the second lowered slab, and connecting the water-collecting stop joint and the pipe stop joint through a drainage pipe, the drainage pipe is pre-embedded in the second lowered slab. Water from the ground flows from the precast slab and the first lowered slab to the second lowered slab, and can then be introduced into the pipe through the water-collecting stop joint and the drainage pipe, so that the water on the second lowered slab can be discharged from the caisson, thereby avoiding water accumulation in the caisson and improving the anti-leakage effect of the caisson.

[0017] By setting one or more parallel positioning strips at the bottom of the second lowering plate, the difficulty of positioning and installing the prefabricated caisson can be reduced and the installation efficiency improved. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a prefabricated caisson according to an exemplary embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of a prefabricated caisson in another exemplary embodiment of the present invention.

[0020] Figure 3 yes Figure 1 A top view of the structure of the prefabricated caisson.

[0021] Figure 4 This is a side view of a prefabricated caisson according to an exemplary embodiment of the present invention.

[0022] Figure 5 This is an enlarged structural schematic diagram of a threaded support column according to an exemplary embodiment of this utility model.

[0023] Figure 6 This is a schematic diagram showing the connection of the flow-collecting water-stop joint and the pipe water-stop joint in the second drop plate of an exemplary embodiment of this utility model.

[0024] Figure 7 This is a schematic diagram of the connection between the lifting ring and the first lowering plate in an exemplary embodiment of this utility model.

[0025] Figure 8 This is a schematic diagram of the assembly and connection structure of a prefabricated caisson according to an exemplary embodiment of this utility model.

[0026] The diagram is labeled as follows: 1-First drop plate, 2-Second drop plate, 3-Connecting section, 4-Reverse curb, 5-Base, 6-Threaded support column, 7-Top reinforcement, 8-Bottom reinforcement, 9-First connecting flange, 10-Second connecting flange, 11-Lifting ring, 12-Collection water stop joint, 13-Pipe water stop joint, 14-Drainage pipe, 15-Collection channel, 16-Positioning strip, 17-Chamfer, 18-Cast-in-place beam, 19-Cast-in-place wall, 20-Aluminum formwork, 21-Support column, 22-Support component. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so that the purpose, technical solution and advantages of the present invention will be clearer. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] refer to Figure 1 The prefabricated caisson of the exemplary embodiment of this utility model includes a first lowering plate 1, a second lowering plate 2, and a connecting section 3. The first lowering plate 1 is disposed at the top of the connecting section 3, and the second lowering plate 2 is disposed at the bottom of the connecting section 3. The first lowering plate 1 and the second lowering plate 2 extend in opposite directions. A reverse curb 4 is provided circumferentially on the edge of the second lowering plate 2. The reverse curb 4, the second lowering plate 2, and the connecting section 3 form a caisson. A plurality of bases 5 for supporting the prefabricated slab are provided at the top of the second lowering plate 2. The bases 5 are integrally formed with the second lowering plate 2. A threaded sleeve for connecting with a threaded support is embedded in the base 5. The threaded sleeve is used for detachable connection with the threaded support.

[0029] Threaded support 6 includes a threaded rod and a concrete support, see reference. Figure 5 The screw is set at the bottom of the concrete column and embedded in the concrete column. The screw and the base 5 are threaded together. Adjusting the height of the threaded support 6 can adjust the installation height of the precast slab, which is convenient for setting up the caisson's elevated layer. The threaded support 6 can stably support the precast slab. In the case of complex pipelines, the cross-sectional area of ​​the threaded support 6 is smaller than that of the brick support, which can effectively reduce the installation space on the second lower plate 2 and reduce the installation difficulty of the precast slab.

[0030] The first drop plate 1, the second drop plate 2, the connecting section 3, the anti-rebound sill 4, and the base 5 are all integrally formed in the prefabrication site, reducing the manufacturing difficulty of the prefabricated caisson. The prefabricated caisson is a reinforced concrete structure with top reinforcement 7 and bottom reinforcement 8 arranged inside. The top reinforcement 7 and bottom reinforcement 8 extend out of the prefabricated caisson respectively. The part of the top reinforcement 7 extending out of the first drop plate 1 and the connecting section 3 bends downward, and the part of the top reinforcement 7 extending out of the second drop plate 2 and the connecting section 3 bends upward. When connecting the prefabricated caisson later, it can improve the stability of the connection between the prefabricated caisson and the surrounding structure. The length of the top reinforcement 7 extending out of the prefabricated caisson is not less than the length of the bottom reinforcement 8 extending out of the prefabricated caisson, and the length of the bottom reinforcement 8 extending out of the prefabricated caisson is not less than 1 / 2 of the thickness of the cast-in-place beam or cast-in-place wall.

[0031] One or more pipe waterstops 13 are pre-embedded on the second lowered slab 2. These pre-embedded pipe waterstops 13 prevent water leakage at the pipe connections of the precast caisson. The pipe waterstops 13 can be fixed PVC waterstops or adjustable PVC waterstops. The number and size of the pipe waterstops 13 are determined according to actual construction needs. A flow-collecting waterstop 12 is also pre-embedded on the second lowered slab 2. The flow-collecting waterstop 12 is connected to one of the pipe waterstops 13 via a drainage pipe 14, which is pre-embedded within the second lowered slab 2 (see reference). Figure 6Water on the ground flows from the precast slab and the first lowered slab 1 onto the second lowered slab 2. It can then be channeled into the pipeline through the water-stop joint 12 and the drainage pipe 14, allowing water on the second lowered slab to drain out of the caisson, thus preventing water accumulation inside the caisson and improving its leak-proof performance. The pipeline water-stop joint 13, the water-stop joint 12, and the drainage pipe 14 are all pre-embedded in the second lowered slab 2 during the precast caisson construction process, improving the leak-proof effect. Therefore, when installing pipelines in the caisson later, there is no need to separately install the drainage pipe 14, reducing the difficulty of pipeline installation.

[0032] When installing prefabricated sunken slabs in bathrooms of different sizes on different floors, the length or width of the first drop slab 1 can be adjusted during the manufacturing process to make the prefabricated sunken slab suitable for bathrooms of different sizes. When the length of the first drop slab 1 is not less than 1.5m, a drainage channel 15 for introducing seepage water into the sunken slab can be set on the first drop slab 1, as shown in the reference. Figures 1-3 Because the first lowered slab 1 is long, water spilled on the ground cannot flow into the caisson in time. A confluence channel 15 is installed on the first lowered slab 1 to shorten the water seepage path. Water on the first lowered slab 1 can flow into the confluence channel 15, then into the caisson, and finally out of the caisson through the collection and sealing joint 12 and the drainage pipe 14. This prevents water on the first lowered slab 1 from seeping downwards, improving the waterproofing effect of the precast caisson. The top surface of the first lowered slab 1 has a slope of 1% to 2%. The confluence channel 15 is located at the toe of the slope of the first lowered slab 1 to facilitate the introduction of water from the first lowered slab 1 into the confluence channel 15, and then into the caisson. The top surface of the second lowered slab 2 has a slope of 1.5% to 2.5%. The collection and sealing joint 12 is located at the angle of the slope of the second lowered slab 2 to facilitate the drainage of water from the second lowered slab 2 into the collection and sealing joint 12.

[0033] The bottom of the second lowering plate 2 is also provided with one or more parallel positioning strips 16 (see reference). Figure 4 , Figure 8 The positioning strip 16 has a rectangular cross-sectional shape and is integrally formed with the second lower plate 2. The positioning strip 16 is set along the length or width direction of the second lower plate 2. During the installation of the precast caisson, a support member 22 needs to be set at the bottom of the precast caisson to support it. After the support member 22 is adjusted to the installation elevation, the positioning strip 16 at the bottom of the precast caisson can be aligned with the support member 22 during the subsequent installation of the precast caisson to quickly position the installation position of the precast caisson, reducing the difficulty of adjusting the positioning and installation of the precast caisson.

[0034] A set of lifting rings 11 are pre-embedded on the first and second lowering plates 1 and 2 respectively (see reference). Figures 1-3The lifting rings 11 on the first lowering plate 1 and the second lowering plate 2 are coaxially arranged. The lifting rings 11 can lift the precast caisson smoothly and ensure the stability of the precast caisson hoisting. The lifting rings 11 are pre-embedded in the first lowering plate 1. During the pre-embedding process, the lifting rings 11 and the ribs 7 in the first lowering plate 1 are welded to form an integral structure. After the concrete is poured, the lifting rings 11 and the first lowering plate 1 are connected to form an integral structure, which can prevent damage to the connection between the lifting rings 11 and the first lowering plate 1 and ensure the reliability of the precast caisson hoisting process.

[0035] A first connecting flange 9 is provided on the side of the first lowering plate 1 (reference). Figure 2 , Figure 4 The first connecting flange 9 has a rectangular cross-section. It can be positioned on the side of the first lowered plate 1 away from the connecting section 3 and / or on the side of the first lowered plate 1 perpendicular to the connecting section 3. The first flange improves the stability and reliability of the precast caisson and surrounding structures (cast-in-place beams or walls). A second connecting flange 10 (see reference) is provided on the outer surface of the retaining wall 4. Figures 1-4 The second connecting flange 10 has a rectangular cross-sectional shape. The second connecting flange 10 can be set on the outer side of the reverse retaining wall 4 opposite to the connecting section 3 and / or on the outer side of the reverse retaining wall 4 perpendicular to the connecting section 3. The second connecting flange 10 can improve the stability and reliability of the precast caisson and the surrounding structure.

[0036] The first connecting flange 9 and the second connecting flange 10 can both be plain concrete structures or reinforced concrete structures. When they are reinforced concrete structures, multiple reinforcing ribs are provided along the length of the first connecting flange 9 and the second connecting flange 10. The reinforcing ribs of the first connecting flange 9 are connected to the top reinforcement 7 or bottom reinforcement 8 of the first lower plate 1, and the reinforcing ribs of the second connecting flange 10 are connected to the top reinforcement 7 or bottom reinforcement 8 of the second lower plate 2. The reinforcing ribs of the first connecting flange 9 can extend out of the first connecting flange 9 or be inside the first connecting flange 9, and the reinforcing ribs of the second connecting flange 10 can extend out of the second connecting flange 10 or be inside the second connecting flange 10. The combination of the first connecting flange 9 and the second connecting flange 10 with the reinforcing ribs can improve the structural strength of the first connecting flange 9 and the second connecting flange 10 themselves, and further improve the stability of the connection between the precast caisson and the surrounding structure.

[0037] Inside the caisson formed by the connecting section 3, the anti-recession 4, and the second lower plate 2, the second lower plate 2 is provided with a chamfer 17 of 30 to 45 degrees in the circumferential direction. The chamfer 17 can thicken the connection parts between the second lower plate 2 and the connecting section 3, and between the second lower plate 2 and the anti-recession 4, thereby improving the anti-leakage effect of the caisson. It also facilitates demolding during the manufacturing process of the precast caisson. The surface of the connecting section 3 away from the second lower plate 2 is a slope, and the slope is also conducive to demolding.

[0038] refer to Figure 8 This utility model also provides an assembly connection structure for a precast caisson. The assembly connection structure for the precast caisson includes the aforementioned caisson, as well as a support device and an aluminum mold 20. The aluminum mold 20 is used to construct the casting space for the cast-in-place wall 19 and the cast-in-place beam 18, and is also used to support the precast caisson. The support device includes a support column 21, and a support member 22 is provided on the top of the support column 21. The support column 21 and the support member 22 are detachably connected. The cross-section of the support member 22 is U-shaped. Multiple support columns 21 are arranged along the length direction of the support member 22. The width of the U-shaped groove of the support member 22 is adapted to the width of the positioning strip 16 to facilitate accurate positioning of the precast caisson.

[0039] During the installation of the precast caisson, aluminum formwork 20 is first used to configure the pouring space for the cast-in-place beam 18 and cast-in-place wall 19. Then, two or more support devices are set between the cast-in-place wall 19 and cast-in-place beam 18 to be poured. The installation position of the support devices and the distance between adjacent support devices are determined according to the installation requirements of the precast caisson. After the support column 21 of the support device is fixed, the height of the support column 21 is adjusted so that the top height of the support column 21 meets the installation height requirements of the precast caisson. Then, the support component 22 and the support column 21 are detachably connected. After connection, the precast caisson is hoisted onto the support device, so that the positioning strip 16 of the precast caisson is engaged with the U-shaped groove of the support component 22. Inside, the precast caisson is accurately positioned. After the precast caisson is positioned, the cast-in-place beam 18 is cast in the casting space of the cast-in-place beam 18 configured in the aluminum formwork 20, and the cast-in-place wall 19 is cast in the casting space of the cast-in-place wall 19 configured in the aluminum formwork 20. After the cast-in-place beam 18 and the cast-in-place wall 19 are cast and formed, the top reinforcement 7, bottom reinforcement 8, first connecting flange 9 and part of the first drop plate 1 of the precast caisson are embedded into the cast-in-place beam 18, forming an integral structure with the cast-in-place beam 18. The top reinforcement 7, bottom reinforcement 8, second connecting flange 10 and part of the reverse wall 4 of the precast caisson away from the connecting section 3 are embedded into the cast-in-place wall 19, forming an integral structure with the cast-in-place wall 19. During the installation of the precast caisson, the cooperation between the positioning strip 16 and the support 22 enables the accurate positioning of the precast caisson, reducing the difficulty of positioning and installation. The precast caisson, cast-in-place beam 18, and cast-in-place wall 19 form an integrated structure, effectively preventing water leakage from the precast caisson. Moreover, the precast caisson is reliably connected to the cast-in-place beam 18 through the first connecting flange 9, the top reinforcement 7, and the bottom reinforcement 8, and reliably connected to the cast-in-place wall 19 through the second connecting flange 10, the top reinforcement 7, and the bottom reinforcement 8, ensuring the installation quality of the precast caisson.

[0040] The above description is merely a detailed illustration of specific embodiments of this utility model, and not a limitation thereof. Various substitutions, modifications, and improvements made by those skilled in the art without departing from the principles and scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A precast caisson, characterized by include: The first lowering plate (1), the second lowering plate (2), and the connecting section (3) are provided. The first lowering plate (1) is located at the top of the connecting section (3), and the second lowering plate (2) is located at the bottom of the connecting section (3). The first lowering plate (1) and the second lowering plate (2) extend in opposite directions. The edge of the second lowering plate (2) is provided with a circumferential anti-sill (4). The anti-sill (4), the second lowering plate (2), and the connecting section (3) form a caisson. The top of the second lowering plate (2) is provided with a plurality of bases (5) for supporting the precast slab. The bases (5) are embedded with threaded sleeves for connecting with threaded supports.

2. The prefabricated caisson according to claim 1, characterized in that, One or more pipe waterstops (13) are pre-embedded on the second drop plate (2), and the pipe waterstops (13) are fixed and / or adjustable PVC waterstops.

3. A pre-fabricated caisson according to claim 2, characterized in that The second drop plate (2) is also provided with a flow-collecting water-stop section (12), which is connected to one of the pipe water-stop sections (13) through a drainage pipe (14), which is pre-embedded in the second drop plate (2).

4. A pre-fabricated caisson according to claim 3, c h a r a c t e r i s e d in that The first drop plate (1) is provided with a confluence channel (15) for introducing seepage water into the caisson.

5. The precast caisson of claim 1, wherein, A set of lifting rings (11) is pre-embedded on the first lower plate (1) and the second lower plate (2), and the lifting rings (11) on the first lower plate (1) and the second lower plate (2) are coaxially arranged.

6. The precast caisson of claim 1, wherein, The first lowering plate (1) is provided with a first connecting flange (9) on its side and / or the outer side of the anti-sink (4) is provided with a second connecting flange (10).

7. The precast caisson of claim 1, wherein, The second lower plate (2) is provided with a chamfer (17) in the circumferential direction, and the surface of the connecting section (3) away from the second lower plate (2) is an inclined surface.

8. The precast caisson of claim 1, wherein, The precast caisson is a steel-concrete structure. The precast caisson is equipped with a top rib (7) and a bottom rib (8). The top rib (7) and the bottom rib (8) extend out of the precast caisson. The part of the top rib (7) extending out of the first drop plate (1) and the connecting section (3) bends downward, and the part of the top rib (7) extending out of the second drop plate (2) and the connecting section (3) bends upward.

9. A pre-fabricated caisson according to any one of claims 1 to 8, characterized in that, The bottom of the second lower plate (2) is provided with one or more parallel positioning strips (16).

10. A prefabricated caisson assembly connection structure, characterized by The precast caisson as described in claim 9 also includes a support device and an aluminum mold (20). The aluminum mold (20) is used to construct the casting space for the cast-in-place wall (19) and the cast-in-place beam (18), and is also used to support the precast caisson. The support device includes a support column (21). A support member (22) is provided on the top of the support column (21). The support column (21) and the support member (22) are detachably connected. The cross section of the support member (22) is U-shaped. Multiple support columns (21) are arranged along the length direction of the support member (22). The width of the U-shaped groove of the support member (22) is adapted to the width of the positioning strip (16).

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