An assembled prefabricated pool wall plate connecting joint and a construction method thereof

Abstract

The application relates to an assembled prefabricated pool wall plate connecting joint and a construction method thereof, and belongs to the technical field of assembled structures. The connecting joint comprises first and second prefabricated wall plates, first and second prefabricated T-shaped shell structures, first and second horizontal steels, a post-poured UHPC connecting section between the prefabricated wall plates and studs; the first and second prefabricated wall plates are provided with the first and second prefabricated T-shaped shell structures and the first and second horizontal steels with a certain length along the wall plate direction on the outer sides; the end of the horizontal steel is welded with the stud; the prefabricated T-shaped shell structure and the horizontal steel are oppositely arranged to form the connecting joint, the connecting joint is filled with ultra-high performance concrete (UHPC), and the post-poured UHPC connecting section between the prefabricated wall plates is formed; the joint position between the post-poured UHPC connecting section and the first and second prefabricated wall plates is smeared with sealant. The application can effectively solve the problems of poor mechanical properties and waterproof performance of the assembled pool wall plate structure.

Description

Technical Field

[0001] This invention relates to a prefabricated water tank wall panel connection node and its construction method, belonging to the field of prefabricated structure technology. Background Technology

[0002] Prefabricated construction technology has been widely used in basic construction industries such as building construction and road and bridge construction, but its application in basic building fields such as water tanks is relatively limited. For prefabricated water tank structures, the tank wall panels are often prefabricated in sections, and the prefabricated components are then connected to ordinary concrete after pouring.

[0003] For example, CN104018718A discloses a leak-proof reinforced concrete circular water tank, comprising a reinforced concrete tank enclosed by a cylindrical tank wall and a foundation slab. A partition slab is installed above the foundation slab, dividing the reinforced concrete tank into a water storage area and a non-water storage area, forming a double-slab reinforced concrete structure. This concentrates the impact of temperature changes on the tank on the tank wall between the foundation slab and the partition slab, thereby reducing temperature stress in the water storage area. This invention, by installing a partition slab above the foundation slab to form a double-slab reinforced concrete structure, concentrates the impact of temperature changes on the tank on the tank wall between the foundation slab and the partition slab, solving the problems of poor anti-cracking effect, complex reinforcement structure, large amount of reinforcement, and high cost in existing technologies.

[0004] CN220080981U discloses a prefabricated wall panel for assembled water tanks based on UHPC and its splicing structure, including a first prefabricated wall panel, one end of which is connected to a second prefabricated wall panel. A first prefabricated outer shell structure is installed on one side of the inner side of the first prefabricated wall panel, and a second prefabricated outer shell structure is installed on one side of the outer side of the second prefabricated wall panel. A first horizontal U-shaped steel bar runs through the inner side of the first prefabricated wall panel, and a second horizontal U-shaped steel bar runs through the inner side of the second prefabricated wall panel. By combining the prefabricated outer shell structure and the horizontal U-shaped steel bars, the prefabricated outer shell structure acts as a formwork to provide support when pouring ultra-high performance concrete in the post-cast section. This not only avoids complex construction processes such as formwork support and shortens construction time, but also extends the seepage path and plays a waterproof role, thus having a dual function. The overlapping of the U-shaped steel bars on both sides can form rectangular stirrups, which improves the stress performance of the water tank wall panel structure.

[0005] The existing technology mentioned above has poor waterproofing stability at the joints due to the use of ordinary concrete post-casting, resulting in unsatisfactory overall building stability. Furthermore, the construction of the post-cast section requires the use of formwork support, making the construction process cumbersome and the construction period long. Summary of the Invention

[0006] To address the aforementioned deficiencies in the existing technology, this invention proposes a prefabricated precast water tank wall panel connection node and its construction method, which solves problems such as poor structural mechanics and waterproof performance of prefabricated water tank wall panels.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A prefabricated water tank wall panel connection node includes a first prefabricated wall panel, a second prefabricated wall panel, a first prefabricated T-shaped shell structure, a second prefabricated T-shaped shell structure, a first horizontal reinforcing bar, a second horizontal reinforcing bar, a post-cast UHPC connection section between the prefabricated wall panels, and studs.

[0009] The first prefabricated wall panel has a first prefabricated T-shaped shell structure of a certain length along the wall panel direction on its outer side, and the second prefabricated wall panel has a second prefabricated T-shaped shell structure of a certain length along the wall panel direction on its outer side.

[0010] The first precast wall panel is provided with multiple sets of first horizontal steel bars, and the second precast wall panel is provided with multiple sets of second horizontal steel bars. The ends of the first horizontal steel bars and the second horizontal steel bars extend a certain length along the wall direction of the first precast wall panel and the second precast wall panel, respectively, and the ends of the extended first horizontal steel bars and the second horizontal steel bars are welded with studs.

[0011] The first precast T-shaped shell structure and the first horizontal steel bar extending outward are arranged opposite to the second precast T-shaped shell structure and the second horizontal steel bar to form a connection node. Ultra-high performance concrete (UHPC) is poured into the connection node to form a post-cast UHPC connection section between the precast wall panels. The joint between the post-cast UHPC connection section between the precast wall panels and the first and second precast wall panels is coated with sealant.

[0012] Furthermore, the stud is provided with a stud head.

[0013] Furthermore, the first horizontal reinforcing bar and the second horizontal reinforcing bar are located on both sides of the first prefabricated T-shaped shell structure and the second prefabricated T-shaped shell structure, respectively.

[0014] Furthermore, the lengths of the first and second horizontal reinforcing bars extending along the wall panel direction are less than the outward extension lengths of the first and second prefabricated T-shaped shell structures.

[0015] Furthermore, the first horizontal reinforcing bar and the second horizontal reinforcing bar are multiple sets arranged along the upper and lower sides of the first precast wall panel and the second precast wall panel.

[0016] Furthermore, the sealant is a polyurethane sealant.

[0017] Furthermore, both the first precast wall panel and the second precast wall panel are factory-prefabricated components.

[0018] Furthermore, the inner and outer surfaces of the post-cast UHPC connection section between the precast wall panels are flush with the inner and outer surfaces of the first or second precast wall panel, respectively.

[0019] Furthermore, the sealant serves as the first layer of waterproofing in the pool wall panel waterproofing system, while the ultra-high performance concrete (UHPC) has a self-waterproofing function, acting as the second layer of waterproofing in the pool wall panel waterproofing system. The first and second prefabricated T-shaped shell structures, which provide pressure at the joints and extend the seepage path, serve as the third layer of waterproofing in the pool wall panel waterproofing system. The sealant, the post-cast UHPC connection section between the prefabricated wall panels formed by the UHPC, and the first and second prefabricated T-shaped shell structures together constitute the waterproofing system of the prefabricated wall panels.

[0020] The above-mentioned construction method for the connection node of prefabricated water tank wall panels includes the following steps:

[0021] S1. After the first and second prefabricated wall panels are prefabricated in the factory using molds, they are transported to the installation site;

[0022] S2. Weld studs onto the extended first and second horizontal reinforcing bars;

[0023] S3. Hoist and fix the first and second precast wall panels, and temporarily fix them with diagonal braces;

[0024] S4. After temporary fixing is completed, support formwork is installed on both sides of the first and second precast wall panels. After the support is completed, ultra-high performance concrete (UHPC) is poured to form a post-cast UHPC connection section between the precast wall panels, thereby realizing the connection between the first and second precast wall panels.

[0025] S5. After pouring, the ultra-high performance concrete (UHPC) is cured and the formwork is removed.

[0026] S6. After curing, apply sealant to the joint between the post-cast UHPC connection section between the precast wall panels and the first and second precast wall panels to enhance the waterproof effect of the pool wall panels.

[0027] The present invention can achieve the following technical effects:

[0028] (1) The prefabricated wall panel structure proposed in this invention includes a T-shaped prefabricated shell structure. When the structure is under tensile force, the T-shaped prefabricated structure can improve the tensile performance of the pool wall panel. Compared with the existing prefabricated wall panel structure, the tensile performance of the structure composed of the prefabricated wall panel and UHPC is improved.

[0029] (2) The T-shaped prefabricated shell structure included in the prefabricated wall panel structure proposed in this invention will be subjected to compressive force at the joint between the UHPC and the prefabricated wall panel during the tensioning process. This makes it less likely for water stored in the pool structure to seep into the joint between the UHPC and the prefabricated wall panel, thereby improving the waterproof performance of the pool wall panel structure. At the same time, the prefabricated T-shaped structure extending from the prefabricated wall panel can extend the seepage path, further improving the waterproof performance of the pool structure. The T-shaped shell structure has a dual function.

[0030] (3) The precast wall panel proposed in this invention has a certain length of steel bar extending along the wall panel direction. Studs are welded on the extended steel bar. The extended steel bar plays the main role in bearing the force. The stud structure can improve the tensile performance of the pool wall panel structure due to the presence of the stud head, and plays the role of strengthening the tensile performance of the steel bar. Compared with the existing precast wall panel structure, the connection between the precast wall panel and the UHPC post-cast section is strengthened.

[0031] (4) The joint between the precast wall panel and UHPC proposed in this invention is coated with sealant. The sealant, the self-waterproofing of the post-cast ultra-high performance concrete, and the T-shaped precast shell structure that provides pressure at the joint and extends the seepage path together constitute the waterproofing system of the precast wall panel. Compared with the existing precast wall panel structure, the waterproofing effect is significantly improved. Attached Figure Description

[0032] Figure 1 This is a top view schematic diagram of the connection node of the prefabricated water tank wall panel of the present invention;

[0033] Figure 2 This is an exploded view of the structure of the prefabricated water tank wall panel connection nodes of the present invention before installation;

[0034] Figure 3 This is a schematic elevation view of the connection node of the prefabricated water tank wall panel of the present invention. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-3 The present invention will be further described in detail below to facilitate a clear understanding of the invention, but these descriptions do not constitute a limitation thereof.

[0036] Example 1

[0037] like Figure 1As shown, a prefabricated water tank wall panel connection node of this embodiment includes a first prefabricated wall panel 1, a second prefabricated wall panel 2, a first prefabricated T-shaped shell structure 3, a second prefabricated T-shaped shell structure 4, a first horizontal reinforcing bar 5, a second horizontal reinforcing bar 6, a post-cast UHPC connection section 9 between the prefabricated wall panels, and studs 7. Both the first prefabricated wall panel 1 and the second prefabricated wall panel 2 are factory prefabricated components. A first prefabricated T-shaped shell structure 3 of a certain length is provided on the outer side of the first prefabricated wall panel 1 along the wall panel direction, and a second prefabricated T-shaped shell structure 4 of a certain length is provided on the outer side of the second prefabricated wall panel 2 along the wall panel direction.

[0038] Multiple sets of first horizontal reinforcing bars 5 are provided inside the first precast wall panel 1, and multiple sets of second horizontal reinforcing bars 6 are provided inside the second precast wall panel 2. The ends of the first horizontal reinforcing bars 5 and the second horizontal reinforcing bars 6 extend a certain length along the wall direction of the first precast wall panel 1 and the second precast wall panel 2, respectively. Studs 7 are welded to the protruding ends of the first horizontal reinforcing bars 5 and the second horizontal reinforcing bars 6, and studs 7 are provided with stud heads. Figure 1 As shown, the first horizontal reinforcing bar 5 and the second horizontal reinforcing bar 6 are located on both sides of the first prefabricated T-shaped shell structure 3 and the second prefabricated T-shaped shell structure 4, respectively, and the lengths of the first horizontal reinforcing bar 5 and the second horizontal reinforcing bar 6 extending along the wall panel direction are less than the outward extension lengths of the first prefabricated T-shaped shell structure 3 and the second prefabricated T-shaped shell structure 4. Furthermore, as... Figure 3 As shown, the first horizontal steel bar 5 and the second horizontal steel bar 6 are multiple sets arranged along the top and bottom of the first precast wall panel 1 and the second precast wall panel 2.

[0039] The first precast T-shaped outer shell structure 3 and the first horizontal reinforcing bar 5 are arranged opposite to the second precast T-shaped outer shell structure 4 and the second horizontal reinforcing bar 6, forming a connection node. Ultra-high performance concrete (UHPC) is poured into the connection node, thus forming a post-cast UHPC connection section 9 between the precast wall panels. Sealant 8 is applied to the joint between the post-cast UHPC connection section 9 between the precast wall panels and the first precast wall panel 1 and the second precast wall panel 2. In this embodiment, the sealant 8 is a polyurethane sealant. In this embodiment, as... Figure 1 As shown, the inner and outer surfaces of the post-cast UHPC connection section 9 between precast wall panels are flush with the inner and outer surfaces of the first precast wall panel 1 or the second precast wall panel 2, respectively.

[0040] In this embodiment, sealant 8 serves as the first layer of waterproofing in the pool wall panel waterproofing system. Ultra-high performance concrete (UHPC) has a self-waterproofing function and serves as the second layer of waterproofing in the pool wall panel waterproofing system. The first prefabricated T-shaped shell structure 3 and the second prefabricated T-shaped shell structure 4 provide pressure at the joint and extend the seepage path, serving as the third layer of waterproofing in the pool wall panel waterproofing system. The sealant, the post-cast UHPC connection section 9 formed between the prefabricated wall panels by ultra-high performance concrete (UHPC), and the first prefabricated T-shaped shell structure 3 and the second prefabricated T-shaped shell structure 4 together constitute the waterproofing system of the prefabricated wall panel.

[0041] Example 2

[0042] The construction method for the connection node of the prefabricated water tank wall panel in Embodiment 1 above includes the following steps:

[0043] S1. After the first prefabricated wall panel 1 and the second prefabricated wall panel 2 are prefabricated in the factory using molds, they are transported to the installation site.

[0044] S2. Weld studs 7 onto the extended first horizontal reinforcing bar 5 and the second horizontal reinforcing bar 6.

[0045] S3. Hoist and fix the first precast wall panel 1 and the second precast wall panel 2, and temporarily fix them with diagonal bracing.

[0046] S4. After temporary fixing is completed, support templates are installed on both sides of the first precast wall panel 1 and the second precast wall panel 2. After the support is completed, ultra-high performance concrete (UHPC) is poured to form the post-cast UHPC connection section 9 between the precast wall panels, thereby realizing the connection between the first precast wall panel 1 and the second precast wall panel 2.

[0047] S5. After pouring, the ultra-high performance concrete (UHPC) is cured and the formwork is removed.

[0048] S6. After curing, apply sealant 8 to the joint between the post-cast UHPC connection section 9 between the precast wall panels and the first precast wall panel 1 and the second precast wall panel 2 to enhance the waterproof effect of the pool wall panels.

[0049] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the structure of the present invention. The arrangement and quantity of the present invention are not limited to this example and can be optimized according to actual engineering conditions. Any modifications, equivalent changes, and decorations made to the above embodiments based on the technical principles of the present invention, without departing from the scope of the present invention, are still within the scope of the present invention.

Claims

1. A construction method for a prefabricated water tank wall panel connection node, wherein the prefabricated water tank wall panel connection node includes a first prefabricated wall panel (1), a second prefabricated wall panel (2), a first prefabricated T-shaped shell structure (3), a second prefabricated T-shaped shell structure (4), a first horizontal steel bar (5), a second horizontal steel bar (6), a post-cast UHPC connection section between prefabricated wall panels (9), and a stud (7). The first prefabricated wall panel (1) has a first prefabricated T-shaped shell structure (3) of a certain length along the wall panel direction on the outer side, and the second prefabricated wall panel (2) has a second prefabricated T-shaped shell structure (4) of a certain length along the wall panel direction on the outer side. The first precast wall panel (1) is provided with multiple sets of first horizontal steel bars (5), and the second precast wall panel (2) is provided with multiple sets of second horizontal steel bars (6). The ends of the first horizontal steel bars (5) and the second horizontal steel bars (6) extend a certain length along the wall direction of the first precast wall panel (1) and the second precast wall panel (2), respectively. The ends of the extended first horizontal steel bars (5) and the second horizontal steel bars (6) are welded with studs (7). The first precast T-shaped shell structure (3) and the first horizontal steel bar (5) extending outward are arranged opposite to the second precast T-shaped shell structure (4) and the second horizontal steel bar (6) to form a connection node. Ultra-high performance concrete (UHPC) is poured into the connection node to form a post-cast UHPC connection section (9) between the precast wall panels. The joint between the post-cast UHPC connection section (9) between the precast wall panels and the first precast wall panel (1) and the second precast wall panel (2) is coated with sealant (8). The stud (7) is provided with a nail head; the first horizontal steel bar (5) and the second horizontal steel bar (6) are respectively located on both sides of the first prefabricated T-shaped shell structure (3) and the second prefabricated T-shaped shell structure (4); the length of the first horizontal steel bar (5) and the second horizontal steel bar (6) extending along the wall panel direction is less than the outward extension length of the first prefabricated T-shaped shell structure (3) and the second prefabricated T-shaped shell structure (4); the first horizontal steel bar (5) and the second horizontal steel bar (6) are multiple sets arranged on the upper and lower sides of the first prefabricated wall panel (1) and the second prefabricated wall panel (2); the sealant (8) is polyurethane. Ester sealant; the sealant (8) is the first layer of waterproofing in the water tank wall panel waterproofing system. Ultra-high performance concrete UHPC has a self-waterproofing function and serves as the second layer of waterproofing in the water tank wall panel waterproofing system. The first prefabricated T-shaped shell structure (3) and the second prefabricated T-shaped shell structure (4) provide pressure at the joint position and extend the seepage path, which are the third layer of waterproofing in the water tank wall panel waterproofing system. The sealant, the post-cast UHPC connection section (9) formed by the prefabricated wall panel and the first prefabricated T-shaped shell structure (3) and the second prefabricated T-shaped shell structure (4) together constitute the waterproofing system of the prefabricated wall panel. Its features are, Includes the following steps: S1. After the first prefabricated wall panel (1) and the second prefabricated wall panel (2) are prefabricated in the factory using molds, they are transported to the installation site; S2. Weld studs (7) onto the extended first horizontal steel bar (5) and second horizontal steel bar (6); S3. Hoist and fix the first precast wall panel (1) and the second precast wall panel (2), and temporarily fix them with diagonal braces; S4. After the temporary fixing is completed, support the formwork on both sides of the first precast wall panel (1) and the second precast wall panel (2). After the support is completed, pour ultra-high performance concrete (UHPC) to form a post-cast UHPC connection section (9) between the precast wall panels, thereby realizing the connection between the first precast wall panel (1) and the second precast wall panel (2). S5. After pouring, the ultra-high performance concrete (UHPC) is cured and the formwork is removed. S6. After curing, apply sealant (8) to the joint between the post-cast UHPC connection section (9) between the precast wall panels and the first precast wall panel (1) and the second precast wall panel (2) to enhance the waterproof effect of the pool wall panels.

2. The construction method for a prefabricated water tank wall panel connection node according to claim 1, characterized in that: Both the first precast wall panel (1) and the second precast wall panel (2) are factory precast components.

3. The construction method for a prefabricated water tank wall panel connection node according to claim 1, characterized in that: The inner and outer surfaces of the post-cast UHPC connection section (9) between the precast wall panels are flush with the inner and outer surfaces of the first precast wall panel (1) or the second precast wall panel (2), respectively.

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