Fabricated anti-slurry-leakage steel formwork for concrete structure pouring

Abstract

The utility model discloses an assembly type anti-slurry-leakage steel formwork for concrete structure pouring. The steel formwork is composed of a combined panel unit, a reinforcing unit and an anti-slurry-leakage structure. The combined panel unit comprises a plurality of panel basic frames and panel pieces, and the panel basic frames and the panel pieces are connected through concave-convex clamping structures. The reinforcing unit comprises a plurality of fixing rods which are connected in a clamped mode, the fixing rods are arranged on the outer side face of the combined panel unit in a surrounding mode to form a panel reinforcing frame, and the panel reinforcing frame is used for tensioning the distance between the panel basic frame and the panel pieces and locking and fixing the panel basic frame and the panel pieces. The device is simple in structure, and undesirable conditions such as mold expansion and slurry leakage are practically prevented; meanwhile, stability and reliability are achieved, the engineering construction quality and efficiency are powerfully guaranteed, circulation is convenient, the device can be used for pouring construction of concrete structures of different sizes, the space needed by supporting is small, the requirement for the narrow construction environment is met, and very good practical value and popularization prospects are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, specifically relating to a prefabricated anti-leakage steel formwork for concrete structure pouring. Background Technology

[0002] Formwork is a temporary support structure, fabricated according to design requirements, to shape the concrete structure according to the specified position and geometric dimensions, maintaining its correct position. The purpose of formwork engineering is to ensure the quality and safety of concrete engineering, accelerate the construction progress, and reduce project costs.

[0003] In existing technologies, wooden formwork is typically used for concrete column pouring to support the concrete and form the required column structure. This presents several problems: 1) The erection and dismantling of wooden formwork is extremely complex, time-consuming, and has poor reusability, hindering the shortening of the construction period and cost reduction. This poses significant challenges and constraints to construction efficiency, cost control, and building quality assurance; 2) Poor fit between wooden formwork panels and gaps between them and the ground allow poured concrete to leak out, resulting in grout leakage or runoff, which degrades the appearance quality of the concrete column; 3) Wooden formwork has weak overall structure and is greatly affected by environmental factors. Its dimensions change with humidity and temperature, leading to deformation and warping during use, which in turn affects the dimensional accuracy and surface flatness of the concrete structure.

[0004] Steel formwork, made primarily of steel, is a type of construction formwork characterized by high strength, high rigidity, dimensional stability, and good reusability, making it a viable alternative to wooden formwork in construction projects. However, in practical applications, existing steel formwork still has many shortcomings. The most obvious problem is its complex structure, requiring a large space for support and placing excessively high demands on the load-bearing capacity and stability of the support system. For example, Chinese patent document CN111561152B discloses a steel formwork for concrete preparation and pouring. To meet the requirements for support load-bearing capacity and stability, this steel formwork uses side support plates, inclined support plates, and butt joint plates to interlock and support hexagonal building columns. There is no relative movement between the side support plates, inclined support plates, and butt joint plates, increasing the support effect on the building columns. Therefore, due to the numerous additional support mechanisms, the complexity of the formwork and the cost of the molds are increased, and a certain amount of construction space is required, making it unsuitable for construction sites with limited space. Another Chinese patent document, CN111519894B, discloses a steel formwork for concrete pouring enclosure support. To address the problems of existing steel formwork joints not being locked into a single unit, causing the formwork to tilt or deviate during concrete pouring and resulting in poor stability, and the joints shifting, leading to poor support column formation, this patent proposes a system including horizontal baffles, vertical baffles, corner plates, a support platform, diagonal supports, and side support mechanisms. The corner plates are L-shaped and located outside the overlapping area of ​​the horizontal and vertical baffles. The front right end of the corner plate connects to the upper end of the diagonal support, and the lower end of the diagonal support is hinged to the support platform. The support platform is then bolted to the ground. Side support mechanisms are located at the left and rear ends of the corner plates, installed between the corner plate and the support platform. This steel formwork structure is also extremely complex and requires a certain amount of support space. In addition, existing steel formwork is prone to bulging and grout leakage. Furthermore, because it is made of steel, it is heavy and inconvenient and laborious to transport and use.

[0005] Therefore, how to develop a simple, easy-to-assemble, and reusable modular formwork for concrete pouring that can provide good support during concrete pouring, save construction space, and better prevent bulging and grout leakage remains a pressing technical challenge. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a prefabricated anti-leakage steel formwork for concrete structure pouring. This formwork consists only of a composite panel, an anti-leakage structure, and a reinforcing structure, resulting in a simple structure. The composite panel is assembled using matching splicing grooves, and the joints are equipped with anti-leakage and water-stopping structures to effectively prevent bulging, leakage, and other adverse conditions. Simultaneously, the reinforcing structure tightens the formwork and seals vertical joints, effectively ensuring the quality and efficiency of the construction project. The specific technical solution is as follows:

[0007] A prefabricated anti-leakage steel formwork for concrete structure pouring is disclosed. The formwork comprises a composite panel unit, a reinforcing unit, and an anti-leakage structure. Each composite panel unit includes several basic panel frames and panel pieces, connected by a snap-fit ​​structure. The basic panel frames are supported at the corners of the concrete structure to be poured, forming the framework of the concrete structure. The panel pieces are assembled with the basic panel frames to define the specific location and geometric dimensions of the concrete structure to be poured. The reinforcing unit includes multiple interlocking fixing rods that surround the outer surface of the composite panel unit to form a panel reinforcing frame, used to tighten and lock the distance between the basic panel frames and the panel pieces. The anti-leakage structure includes anti-leakage materials placed between the steel formwork and the ground, in and near the joints of the steel formwork, to prevent grout leakage during concrete pouring.

[0008] The aforementioned prefabricated anti-leakage steel formwork for concrete structure pouring includes a composite panel unit with at least three basic panel frames and three panel pieces. The basic panel frames are supported at the corners of the concrete structure to be poured, and the panel pieces are supported on the sides of the concrete structure. The interlocking structure includes interlocking grooves on both sides of the basic panel frame and interlocking protrusions on the side edge of the panel piece that contacts the basic panel frame, which match the interlocking grooves. The interlocking protrusions are inserted into the interlocking grooves to assemble the panel piece and the basic panel frame.

[0009] Preferably, in the aforementioned prefabricated anti-leakage steel formwork for concrete pile casting, there are multiple composite panel units, which are divided into upper composite panel units, middle composite panel units, and lower composite panel units from top to bottom according to their enclosure position; there are several middle composite panel units, and the upper, middle, and lower composite panel units are also connected by a convex-concave interlocking structure.

[0010] The aforementioned prefabricated anti-leakage steel formwork for concrete pile casting includes multiple sets of reinforcement units, with each combined panel unit corresponding to at least one set of reinforcement units. Each set of reinforcement units contains three or more fixing rods, which are steel rods including a clamping part in the middle and snap-fit ​​parts at both ends. The snap-fit ​​parts are equipped with interlocking components, which include multiple interlocking teeth and interlocking grooves spaced apart. Each fixing rod is interlocked with the interlocking teeth and interlocking grooves to clamp the basic frame and panel pieces in the combined panel unit.

[0011] Preferably, in the aforementioned prefabricated anti-leakage steel formwork for concrete pile casting, the corresponding part of the interlocking tooth groove is also provided with a reinforcing nut through hole, and after each fixing rod is interlocked, the relative position between the basic frame of the panel and the panel piece is locked by the reinforcing nut.

[0012] Preferably, in the aforementioned prefabricated anti-leakage steel formwork for concrete pile casting, the reinforcement unit further includes a panel fixing piece, which is attached to each vertical joint of the steel formwork through multiple sets of pin frame structures; the pin frame structure includes two limiting frames with L-shaped cross sections symmetrically arranged on both sides of the vertical joint of the steel formwork, one end of which is fixed to the panel basic frame or panel piece, and the other end is arranged opposite to it, forming a pin frame channel into which the panel fixing piece can be inserted.

[0013] The aforementioned prefabricated anti-leakage steel formwork for concrete pile casting includes anti-leakage materials or coatings, sealing strips, waterstop strips, and prefabricated rubber waterstops. The anti-leakage materials or coatings are applied to the interlocking grooves and interlocking protrusions of the steel formwork. The sealing strips are wrapped around the outside of the joints of the steel formwork. The waterstop strips are located on the upper part of the lower combined panel unit, and the prefabricated rubber waterstops are located between the steel formwork and the ground.

[0014] Preferably, in the aforementioned prefabricated anti-leakage steel formwork for concrete pile casting, the upper part of the basic frame and panel of the lower combined panel unit is provided with a water-stop groove. The water-stop groove is close to the joint between the lower combined panel unit and the adjacent middle combined panel unit. The water-stop strip is filled in the water-stop groove to absorb the moisture in the mortar and seal the gap after expansion.

[0015] Preferably, in the aforementioned prefabricated anti-leakage steel formwork for concrete pile casting, the prefabricated rubber waterstop includes a formwork pad and a formwork inverted portion, which are integrally formed, and the formwork inverted portion is perpendicular to the formwork pad, making the cross-section of the prefabricated rubber waterstop T-shaped; the formwork pad is divided into an inner formwork pad area and an outer formwork pad area by the formwork inverted portion; the bottom of the steel formwork is pressed against the inner formwork pad area and closely attached to the formwork inverted portion, and the formwork inverted portion extends upward from the bottom of the steel formwork to invert the bottom of the panel basic frame and panel piece in the combined panel unit at the bottom of the steel formwork.

[0016] Preferably, the aforementioned prefabricated anti-leakage steel formwork for concrete pile casting further includes an installation and positioning structure. The installation and positioning structure is an L-shaped limiter, which is set at the bottom of the steel formwork. One side of the limiter presses against the outer formwork pad area of ​​the prefabricated rubber waterstop formwork pad, and the other side is in close contact with the formwork reverse wrapping part of the prefabricated rubber waterstop. This is used to position the basic frame and panel of the lower combined panel unit of the steel formwork, and to make the fit between the prefabricated rubber waterstop and the steel formwork and the ground more secure.

[0017] Beneficial effects: This utility model of prefabricated anti-grout leakage steel formwork has many significant advantages:

[0018] 1) Firstly, this utility model of prefabricated anti-grout leakage steel formwork, through the design of combined panel units, divides the formwork into small pieces, making it extremely convenient for transportation and installation. During assembly, the interlocking structure connects and reinforces the units, requiring fewer parts and effectively overcoming the problem of complicated installation and disassembly procedures in traditional formwork, thus significantly shortening the construction period. At the same time, the interlocking structure also effectively solves the problem of poor overall structural integrity of the formwork, improving construction safety.

[0019] 2) Secondly, the prefabricated anti-leakage steel formwork of this utility model can provide strong support during the concrete pouring process through the design of the reinforcement unit, which solves the problem of the steel formwork having too high requirements for the load-bearing capacity and stability of the support system, effectively prevents the formwork from bulging and saves the space required for support, and can adapt to the requirements of narrow construction environment.

[0020] 3) In addition, the prefabricated anti-leakage steel formwork of this utility model adopts a variety of anti-leakage measures such as anti-leakage materials or coatings, sealing strips, waterstop strips, and prefabricated rubber waterstops. Combined with the steel formwork structure, it significantly reduces the leakage caused by insufficient fit between formwork panels and gaps between the formwork and the ground, effectively prevents the occurrence of adverse situations such as leakage during the pouring process, and strongly guarantees the construction quality of the project.

[0021] 4) Finally, the number of panel basic frames and panel pieces in the combined panel unit of the prefabricated anti-grouting steel formwork of this utility model can be multiple, and the size can be designed in various specifications to be applicable to the pouring construction of concrete structures of different sizes; the shape of the panel basic frames and panel pieces can also be designed according to requirements to meet the pouring of concrete building structures of different shapes; and the combined panel unit of the prefabricated anti-grouting steel formwork of this utility model can be multiple, to meet the pouring construction of concrete structures of different heights, and has very good practical value and promotion prospects. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the prefabricated anti-leakage steel formwork for concrete structure pouring according to this utility model.

[0023] Figure 2 This is a schematic diagram of the combined panel unit structure of the prefabricated anti-grouting steel formwork for concrete structure pouring according to this utility model.

[0024] Figure 3 This is a schematic diagram of the basic frame structure of the panel of the prefabricated anti-grouting steel formwork for concrete structure pouring of this utility model.

[0025] Figure 4 This is a schematic diagram of the panel structure of the prefabricated anti-leakage steel formwork for concrete structure pouring of this utility model.

[0026] Figure 5 This is a schematic diagram of the lower combined panel unit (water-stop groove) structure of the prefabricated anti-leakage steel formwork for concrete structure pouring of this utility model;

[0027] Figure 6 This is a schematic diagram of the interlocking structure of the fixing rod of the reinforcing unit of the prefabricated anti-grouting steel formwork for concrete structure pouring of this utility model.

[0028] Figure 7 This is a schematic diagram of the fixing rod structure of the prefabricated anti-grouting steel formwork for concrete structure pouring according to this utility model;

[0029] Figure 8 This is a schematic diagram of the prefabricated rubber waterstop structure of the assembled anti-leakage steel formwork for concrete structure pouring of this utility model.

[0030] Figure 9 This invention relates to the assembly base structure of the prefabricated anti-leakage steel formwork for concrete structure pouring.

[0031] In the diagram: 1. Combined panel unit; 11. Basic panel frame; 111. Fixing clip; 12. Panel piece; 101. Upper combined panel unit; 102. Middle combined panel unit; 103. Lower combined panel unit; 2. Reinforcing unit; 21. Fixing rod; 211. Clamping part; 212. Snap-fit ​​part; 22. Panel fixing piece; 3. Leak-proof grout structure; 31. Waterstop strip; 32. Precast rubber waterstop; 321. Template pad; 3211. Inner template pad area; 3212. Outer template pad area; 322. Template reverse wrapping part; 4. Concave-convex snap-fit ​​structure; 41. Snap-fit ​​groove; 42. Snap-fit ​​protrusion; 5. Engaging component; 51. Engaging tooth; 52. Engaging tooth groove; 53. Reinforcing nut through hole; 6. Pin frame structure; 61. L-shaped limiting frame; 7. Waterstop groove; 8. Installation positioning structure. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Specific embodiments are as follows:

[0033] This embodiment is a prefabricated anti-leakage steel formwork for concrete structure pouring. The steel formwork consists of a combined panel unit 1, a reinforcing unit 2, and an anti-leakage structure 3. The combined panel unit 1 includes several basic panel frames 11 and panel pieces 12, which are connected by a tongue-and-groove interlocking structure 4. The basic panel frames 11 are supported at the corners of the concrete structure to be poured, forming the framework of the concrete structure. The panel pieces 12 are assembled with the basic panel frames 11 to define the specific location and geometric dimensions of the concrete structure to be poured. The reinforcing unit 2 includes multiple interlocking fixing rods 21, which surround the outer side of the combined panel unit 1 to form a panel reinforcing frame, used to tighten and lock the distance between the basic panel frames 11 and the panel pieces 12. The anti-leakage structure 3 includes relevant anti-leakage materials placed between the steel formwork and the ground, in each joint of the steel formwork, and near the joints to prevent grout leakage during concrete pouring. With its simple structure and convenient assembly, it effectively prevents problems such as bulging and grout leakage, thus ensuring the quality and efficiency of engineering construction.

[0034] In this embodiment, the prefabricated anti-leakage steel formwork for concrete structure pouring includes at least three panels: a basic panel frame 11 and a panel piece 12. The basic panel frame 11 is supported at the corner of the concrete structure to be poured, and the panel piece 12 is supported on the side of the concrete structure. The interlocking structure 4 includes interlocking grooves 41 on both sides of the basic panel frame 11 and interlocking protrusions 42 on the side edge of the panel piece 12 that contacts the basic panel frame 11, which match the interlocking grooves 41. The interlocking protrusions 42 are inserted into the interlocking grooves 41 to assemble the panel piece 12 and the basic panel frame 11. The shapes of the basic frame 11 and panel 12 are designed according to the building structure to be poured. If the building structure to be poured is a square column structure, then the basic frame 11 is located at the four corners, and the panel 12 is flat. If the building structure to be poured is a cylindrical structure, then the basic frame 11 is a certain number of arc-shaped structures designed as needed, and the panel 12 used is also a concentric arc-shaped structure. In addition, fixing clips 111 can be set at the corners or middle positions of the basic frame 11 to strengthen its support strength. In addition, in the prefabricated anti-leakage steel formwork for concrete structure pouring described in this embodiment, the combined panel unit 1 can also be multiple, divided into upper combined panel unit 101, middle combined panel unit 102 and lower combined panel unit 103 from top to bottom according to its enclosure position; there are several middle combined panel units 102, and the upper, middle and lower combined panel units are also connected by a concave-convex interlocking structure 4. Taking the pouring of a concrete pile column with a square cross section as an example, Figures 1 to 9 As shown, based on the height of the pile, the template is divided into three combined panel units: upper, middle, and lower. Each combined panel unit includes four basic panel frames 11 located at the four corners. Based on the width of each side of the pile, each combined panel unit includes four panel pieces 12. Each basic panel frame 11 has a snap-fit ​​groove 41 on its edge, and each panel piece 12 has a snap-fit ​​protrusion 42 on its edge. The lower edges of the basic panel frames 11 and panel pieces 12 of the upper combined panel unit 101 have snap-fit ​​grooves 41. The upper edges of the basic panel frames 11 and panel pieces 12 of the middle combined panel unit 102 have snap-fit ​​protrusions 42 on their upper edges and snap-fit ​​grooves 41 on their lower edges. The lower edges of the basic panel frames 11 and panel pieces 12 of the lower combined panel unit 103 have snap-fit ​​protrusions 42 on their upper edges. The basic panel frames 11, panel pieces 12, and each combined panel unit are assembled by inserting the snap-fit ​​protrusions 42 into the snap-fit ​​grooves 41. It should be noted that in practical applications, the height of the required support template varies, and the height of the corresponding panel frame will also change flexibly accordingly. Similarly, given that the required length and width of the support template differ, the width of the panel used will also be adjusted accordingly. Based on this characteristic, this invention can adapt to support requirements of different lengths, widths, and heights.

[0035] The prefabricated anti-leakage steel formwork for concrete structure pouring described in this embodiment has multiple sets of reinforcing units 2, with each combined panel unit 1 corresponding to at least one set of reinforcing units 2. The lowest combined panel unit 103 requires two sets of reinforcing units 2 to strengthen its root and prevent bulging. Each set of reinforcing units 2 contains at least three fixing rods 21, which are steel rods, preferably square in cross-section, but can also be round or multi-faceted rods in other embodiments. In this embodiment, the fixing rod 21 includes a central clamping part 211 and two end engaging parts 212. The engaging part 212 is equipped with an interlocking component 5, which includes multiple spaced interlocking teeth 51 and interlocking grooves 52. Each fixing rod 21 is engaged and clamped together by the interlocking teeth 51 and interlocking grooves 52, thus tightening the panel basic frame 11 and panel piece 12 in the combined panel unit 1. Furthermore, preferably, the corresponding part of the interlocking groove 52 is also provided with a reinforcing nut through hole 53, and after the fixing rods 21 are engaged, the relative position between the panel basic frame 11 and the panel piece 12 is locked by the reinforcing nut. Again, taking the above-mentioned concrete pile column with a square cross-section as an example, such as... Figures 6 to 7 As shown, the reinforcement unit 2 includes four fixing rods that clamp and lock the combined panel units to form a stable frame structure. In a preferred embodiment, the four fixing rods have identical structures. Multiple interlocking teeth 51 and interlocking grooves 52 are provided at both ends of the fixing rods, with the interlocking teeth 51 and interlocking grooves 52 distributed vertically. The interlocking grooves 52 have through holes 53 for reinforcement nuts. In use, the fixing rods are assembled by the tight interlocking of the interlocking grooves 52. During this process, the size of the panel reinforcement frame can be easily and precisely changed by flexibly adjusting the interlocking position of the interlocking grooves 52 to adapt to different construction needs. When the interlocking grooves 52 are in the ideal position, the stability and reliability of the entire frame structure are ensured. However, in other embodiments, the structure of the fixing rods can be designed differently, as long as it allows for the assembly and clamping of the combined panel units between the rods and provides sufficient reinforcement strength.

[0036] In this embodiment, the reinforcing unit 2 further includes a panel fixing piece 22, which is attached to each vertical joint of the steel formwork through multiple sets of pin frame structures 6. The pin frame structure 6 includes two L-shaped limiting frames 61 symmetrically arranged on both sides of the vertical joint of the steel formwork. One end of the limiting frame 61 is fixed to the basic panel frame 11 or panel piece 12, and the other end is arranged opposite to it, forming a pin frame channel into which the panel fixing piece 22 can be inserted. That is, the panel fixing piece can be directly and smoothly inserted into the pin frame, so as to achieve precise docking between components. While effectively reinforcing the formwork, it can also further prevent grout leakage. It can not only provide strong reinforcement to the formwork, but also stably fix the sealing strip at the splice joint, greatly enhancing the stability and sealing of the combined panel unit 1 structure, thereby ensuring the sealing and integrity of the entire structure. In addition, the design of the pin frame structure 6 as two symmetrically arranged L-shaped limiting frames 61 also provides great convenience for subsequent assembly and adjustment.

[0037] The prefabricated anti-leakage steel formwork for concrete pile casting described in this embodiment uses anti-leakage materials, including anti-leakage material or coating, sealing strips, waterstop strips, and prefabricated rubber waterstops, as part of the anti-leakage structure 3. Specifically, the anti-leakage material or coating is applied to the grooves 41 and protrusions 42 of the steel formwork; the sealing strips are wrapped around the outside of the joints of the steel formwork; the waterstop strips 31 are located on the upper part of the lower combined panel unit 103; and the prefabricated rubber waterstops 32 are placed between the steel formwork and the ground. In the case of concrete pile casting with a square cross-section, the anti-leakage at the joint between the upper combined panel unit 101 and the middle combined panel unit 102 is mainly achieved by using the weight of the formwork itself to reduce the joint width. Anti-leakage material or coating is added to the joint gap, and a sealing strip is wrapped around the formwork along the joint. For the work of preventing grout leakage at the vertical joints inside the composite panel unit, the key is to use the reinforcement unit to tighten the template to reduce the joint width, and to add grout-proof material or coating to the splice gap, which works in conjunction with the reinforcement of the panel to prevent grout leakage.

[0038] To prevent grout leakage at the joint between the middle composite panel unit 102 and the lower composite panel unit 103, a water-stop groove 7 is installed 5 cm below the joint on the upper part of the panel basic frame 11 and panel piece 12 of the lower composite panel unit 103. A water-swellable water-stop strip 31 is filled in the water-stop groove 7. If concrete mortar leaks, the water-swellable water-stop strip immediately absorbs the moisture in the mortar and expands, effectively sealing the gap. Simultaneously, the reduced moisture in the mortar due to absorption by the water-stop strip accelerates concrete setting, further enhancing the grout leakage prevention effect and ensuring construction quality and structural stability.

[0039] For preventing grout leakage at the joint between the lower panel unit 103 and the ground (or foundation structure), the prefabricated rubber waterstop 32 is mainly used for prevention. The prefabricated rubber waterstop 32 includes a template pad 321 and a template inverted wrapping part 322. The template pad 321 and the template inverted wrapping part 322 are integrally formed, and the template inverted wrapping part 322 is perpendicular to the template pad 321, making the cross-section of the prefabricated rubber waterstop 32 T-shaped. The template pad 321 is divided into an inner template pad area 3211 and an outer template pad area 3212 by the template inverted wrapping part 322. The bottom of the steel template is pressed against the inner template pad area 3211 and closely attached to the template inverted wrapping part 322. The template inverted wrapping part 322 extends upward from the bottom of the steel template and inverts the bottom of the panel basic frame 11 and panel piece 12 in the combined panel unit 1 at the bottom of the steel template, forming a tightly fitted second barrier. That is, the bottom of the template is tightly wrapped by the prefabricated rubber waterstop to achieve a sufficient anti-grout leakage effect.

[0040] Finally, the prefabricated anti-leakage steel formwork for concrete pile casting described in this embodiment also includes an installation and positioning structure 8. The installation and positioning structure 8 is an L-shaped limiter, installed at the bottom of the steel formwork. One side presses against the outer formwork pad area 3212 of the prefabricated rubber waterstop 32 formwork pad 321, while the other side is tightly attached to the formwork reverse wrapping part 322 of the prefabricated rubber waterstop 32. This is used to position the basic frame 11 and panel piece 12 of the lower combined panel unit 103 of the steel formwork, and to ensure a tighter fit between the prefabricated rubber waterstop 32 and the steel formwork and the ground. This installation and positioning structure 8, on the one hand, can tightly compress the prefabricated rubber waterstop, ensuring a close fit with the surrounding structure and eliminating the risk of leakage; on the other hand, it can accurately determine the position of the formwork, providing an accurate benchmark for the smooth progress of subsequent construction and ensuring the quality and precision of the entire project.

[0041] This utility model relates to a prefabricated anti-leakage steel formwork for concrete pile casting. In use, a prefabricated rubber waterstop 32 is laid around the building structure to be cast, and then the lower composite panel unit 103 at the bottom is assembled. After assembly, the lower composite panel unit 103 is pressed together using an installation positioning structure 8 and secured with a set of interlocking fixing rods. Then, the middle composite panel unit 102 and the upper composite panel unit 101 are assembled in sequence. After each composite panel unit is assembled, the vertical joints are sealed with panel fixing pieces 22, and then secured with interlocking fixing rods before concrete casting.

[0042] In summary, this utility model of prefabricated anti-leakage steel formwork for concrete pile casting features a simple structure, convenient assembly, and easy transportation, which helps to significantly shorten the construction period. Simultaneously, the formwork structure has good overall integrity, providing strong support during concrete pouring and improving construction safety. Furthermore, this utility model employs multiple anti-leakage measures such as anti-leakage materials or coatings, sealing strips, waterstops, and prefabricated rubber waterstops to effectively prevent grout leakage and other adverse conditions during pouring, thus strongly guaranteeing construction quality and effectively preventing problems such as formwork bulging and grout leakage. Finally, this utility model of prefabricated anti-leakage steel formwork can be designed in various sizes to suit the pouring of concrete structures of different dimensions, and requires little space for support, adapting to the requirements of confined construction environments. It has excellent practical value and promising prospects for widespread application.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A prefabricated anti-leakage steel formwork for concrete structure pouring, characterized in that: The steel formwork consists of a combined panel unit (1), a reinforcing unit (2), and a grout-proof structure (3); The combined panel unit (1) includes several panel basic frames (11) and panel pieces, and the panel basic frames (11) and panel pieces (12) are connected by a concave-convex snap-fit ​​structure (4); The panel basic frame (11) is supported at the corner of the concrete structure to be poured, forming the frame of the concrete structure to be poured; the panel piece (12) is assembled with the panel basic frame (11) to define the specific location and geometric dimensions of the concrete structure to be poured. The reinforcing unit (2) includes multiple interlocking fixing rods (21), which surround the outer side of the combined panel unit (1) to form a panel reinforcing frame, used to tighten the distance between the panel basic frame (11) and the panel piece (12) and lock it in place; The anti-leakage structure (3) includes relevant anti-leakage materials placed between the steel formwork and the ground, in each joint of the steel formwork, and near the joints to prevent grout leakage during concrete pouring.

2. The prefabricated anti-leakage steel formwork for concrete structure pouring according to claim 1, characterized in that: The combined panel unit (1) has at least three basic panel frames (11) and three panel pieces (12). The basic panel frames (11) are supported at the corners of the concrete structure to be poured, and the panel pieces (12) are supported on the sides of the concrete structure. The interlocking structure (4) includes interlocking grooves (41) on both sides of the basic panel frames (11) and interlocking protrusions (42) matching the interlocking grooves (41) on the side edge of the panel piece (12) that contacts the basic panel frames (11). The interlocking protrusions (42) are inserted into the interlocking grooves (41) to assemble the panel piece (12) and the basic panel frames (11).

3. The prefabricated anti-leakage steel formwork for concrete structure pouring according to claim 2, characterized in that: The combined panel unit (1) is multiple, and according to its enclosure position, it is divided into upper combined panel unit (101), middle combined panel unit (102) and lower combined panel unit (103) from top to bottom; the middle combined panel unit (102) is several, and the upper, middle and lower combined panel units are also connected by a concave-convex snap-fit ​​structure (4).

4. The prefabricated anti-leakage steel formwork for concrete structure pouring according to claim 1, characterized in that: The reinforcement unit (2) is in multiple groups, and each combined panel unit (1) corresponds to at least one group of reinforcement units (2). Each reinforcement unit (2) has three or more fixing rods (21). The fixing rod (21) is a rod-shaped member made of steel, which includes a clamping part (211) in the middle and a snap-fit ​​part (212) at both ends. The snap-fit ​​part (212) is provided with a snap-fit ​​component (5), which includes a plurality of snap-fit ​​teeth (51) and snap-fit ​​grooves (52) arranged at intervals. Each fixing rod (21) is snapped together by the snap-fit ​​teeth (51) and the snap-fit ​​grooves (52) to clamp the panel basic frame (11) and the panel piece (12) in the combined panel unit (1).

5. The prefabricated anti-leakage steel formwork for concrete structure pouring according to claim 4, characterized in that: The corresponding part of the meshing groove (52) is also provided with a reinforcing nut through hole (53). After the fixing rods (21) are meshed and locked, the reinforcing nut is used to lock the relative position between the basic frame (11) of the panel and the panel piece (12).

6. The prefabricated anti-leakage steel formwork for concrete structure pouring according to claim 4, characterized in that: The reinforcement unit (2) also includes a panel fixing piece (22), which is attached to each vertical joint of the steel template through multiple sets of pin frame structures (6); The pin frame structure (6) includes two L-shaped limiting frames (61) symmetrically arranged on both sides of the vertical joint of the steel template. One end of the limiting frame (61) is fixed on the basic frame (11) or panel piece (12) of the panel, and the other end is arranged opposite to it, forming a pin frame channel into which the panel fixing piece (22) can be inserted.

7. The prefabricated anti-leakage steel formwork for concrete structure pouring according to claim 1, characterized in that: The leak-proof materials used in the leak-proof grout structure (3) include leak-proof grout materials or coatings, sealing strips, waterstop strips and prefabricated rubber waterstops; The anti-leakage material or coating is applied to the grooves (41) and protrusions (42) of the steel formwork. The sealing strips are wrapped around the outside of each joint of the steel template. The waterstop strip (31) is located on the upper part of the lower combined panel unit (103). The prefabricated rubber waterstop (32) is installed between the steel template and the ground.

8. The prefabricated anti-leakage steel formwork for concrete structure pouring according to claim 7, characterized in that: The lower combined panel unit (103) has a water-stop groove (7) on the upper part of the panel basic frame (11) and panel piece (12). The water-stop groove (7) is close to the joint between the lower combined panel unit (103) and the adjacent middle combined panel unit (102). The water-stop strip (31) is filled in the water-stop groove (7) to absorb the moisture in the mortar and seal the gap after expansion.

9. The prefabricated anti-leakage steel formwork for concrete structure pouring according to claim 7, characterized in that: The prefabricated rubber waterstop (32) includes a template pad (321) and a template back wrap (322). The template pad (321) and the template back wrap (322) are integrally formed, and the template back wrap (322) is perpendicular to the template pad (321) so that the cross-section of the prefabricated rubber waterstop (32) is T-shaped. The template pad (321) is divided into an inner template pad area (3211) and an outer template pad area (3212) by the template back wrap (322). The bottom of the steel template is pressed against the inner template pad area (3211) and closely attached to the template back wrapping part (322). The template back wrapping part (322) extends upward from the bottom of the steel template and back wraps the bottom of the panel basic frame (11) and panel piece (12) in the combined panel unit (1) at the bottom of the steel template.

10. The prefabricated anti-leakage steel formwork for concrete structure pouring according to claim 9, characterized in that: The steel formwork also includes an installation positioning structure (8), which is an L-shaped limiter. It is set at the bottom of the steel formwork, with one side pressing against the outer formwork pad area (3212) of the prefabricated rubber waterstop (32) formwork pad (321), and the other side closely attached to the formwork reverse wrapping part (322) of the prefabricated rubber waterstop (32). It is used to position the basic frame (11) and panel piece (12) of the lower combined panel unit (103) of the steel formwork, and to make the fit between the prefabricated rubber waterstop (32) and the steel formwork and the ground more secure.

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