Reinforced concrete open-web sandwich panel modular cast-in-situ formwork

Abstract

This utility model relates to the field of building construction technology, specifically to a modular cast-in-place mold for reinforced concrete hollow sandwich slabs, comprising a mold frame assembly and a baffle assembly. The mold frame assembly includes a first mold frame, at least one second mold frame, and a third mold frame. The first mold frame has a first protrusion at one end, the second mold frame has a corresponding first recess at one end and a second protrusion at the other end, and the third mold frame has a corresponding second recess at one end. By interlocking the first protrusion with the first recess and the second protrusion with the second recess, the overall size of the mold frame assembly can be adjusted by increasing or decreasing the number of second mold frames to accommodate different slab specifications. The baffle assembly is detachably connected to the assembled mold frame assembly, together forming the casting cavity. The modular, standardized design and detachable nature of the mold frame assembly and baffle assembly improve standardization and reusability; standardized modular assembly shortens the construction cycle and reduces construction costs.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and more specifically, to a modular cast-in-place mold for reinforced concrete hollow sandwich panels. Background Technology

[0002] In building structures, the self-weight of the floor slab typically constitutes a major portion of the dead load, often exceeding 50%. This characteristic dictates that reducing the self-weight of the floor slab plays a crucial role in reducing the overall structural load effect and saving on concrete and steel consumption. Based on this principle of weight reduction and efficiency enhancement, reinforced concrete hollow sandwich slabs have become a new type of high-efficiency floor slab system. Its core structural innovation lies in hollowing out a two-way solid slab to form two layers of closely ribbed floor slabs, which are rigidly connected and share loads collaboratively through shear keys. Reinforced concrete hollow sandwich slabs offer significant advantages: their self-weight is far lower than that of solid slabs, greatly reducing concrete and steel consumption; the reduced self-weight simultaneously reduces the seismic forces on the structure; and the regular internal spaces facilitate flexible layouts with large spans. Due to these combined benefits, this system has been widely applied in the field of prefabricated assembled buildings.

[0003] During the pouring of reinforced concrete hollow sandwich slabs, due to the large size of each individual slab, traditional wooden molds are usually used for integral pouring. However, the wooden molds have low positioning accuracy, low standardization, and low reuse rate, which increases the construction cycle and construction cost. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a modular cast-in-place mold for reinforced concrete hollow sandwich slabs, which adopts a modular structure for standardized assembly, improves reusability, and reduces construction time and costs.

[0005] A modular cast-in-place mold for reinforced concrete hollow sandwich slabs according to an embodiment of the present invention includes:

[0006] A mold frame assembly, comprising a first mold frame, a second mold frame, and a third mold frame; at least one second mold frame is provided; one end of the first mold frame is provided with a first protrusion, one end of the second mold frame is provided with a first groove corresponding to the first protrusion, the other end of the second mold frame is provided with a second protrusion, and one end of the third mold frame is provided with a second groove corresponding to the second protrusion;

[0007] A baffle assembly, which is detachably connected to the mold frame assembly, is used to form a casting mold cavity.

[0008] According to some embodiments of the present invention, the cross-sections of the first protrusion, the first groove, the second protrusion, and the second groove are all isosceles triangular structures.

[0009] According to some embodiments of the present invention, the cross-sections of the first protrusion, the first groove, the second protrusion, and the second groove are all isosceles trapezoidal structures.

[0010] According to some embodiments of the present invention, the casting mold cavity includes a first mold cavity, a second mold cavity, and a third mold cavity. The first mold cavity is used to form the upper rib of the hollow plate, the second mold cavity is used to form the shear key of the hollow plate, and the third mold cavity is used to form the lower rib of the hollow plate.

[0011] According to some embodiments of the present invention, the baffle assembly includes a side baffle, and the side baffle is provided with rib holes at the first mold cavity and the third mold cavity, the rib holes being used to place upper ribs and lower ribs.

[0012] According to some embodiments of the present invention, the baffle assembly includes a support structure arranged circumferentially in the second mold cavity. The support structure is formed by sequentially splicing a first trapezoidal plate, a second trapezoidal plate, a third trapezoidal plate, a fourth trapezoidal plate, a fifth trapezoidal plate, and a sixth trapezoidal plate to form a U-shaped structure.

[0013] According to some embodiments of the present invention, the second trapezoidal plate is perpendicular to the third trapezoidal plate, and the fourth trapezoidal plate is perpendicular to the fifth trapezoidal plate; a first reinforcing rib is provided between the second trapezoidal plate and the third trapezoidal plate; and a second reinforcing rib is provided between the fourth trapezoidal plate and the fifth trapezoidal plate.

[0014] According to some embodiments of the present invention, the baffle assembly is provided with a thin plate baffle in the circumferential direction on the upper end face of the mold frame assembly, and the thin plate baffle is used to form the upper surface thin plate of the hollow plate.

[0015] According to some embodiments of the present invention, the thin plate baffle is formed by splicing together several angle steels, and the thin plate baffle is provided with several U-shaped slots for placing thin plate reinforcing bars.

[0016] According to some embodiments of this utility model, a plurality of columns are provided at the connection points of the first mold frame, the second mold frame and the third mold frame.

[0017] A modular cast-in-place mold for reinforced concrete hollow sandwich slabs according to an embodiment of the present invention has at least the following beneficial effects:

[0018] According to the present invention, a modular cast-in-place mold for reinforced concrete hollow sandwich slabs includes a mold frame assembly and a baffle assembly. The mold frame assembly comprises a first mold frame, a second mold frame, and a third mold frame; at least one second mold frame is provided; one end of the first mold frame has a first protrusion, one end of the second mold frame has a first groove corresponding to the first protrusion, the other end of the second mold frame has a second protrusion, and one end of the third mold frame has a second groove corresponding to the second protrusion; the baffle assembly and the mold frame assembly are detachably connected to form a casting cavity. Specifically, in this scheme, the formwork assembly achieves precise connection and positioning of the first, second, and third formwork frames through the engagement of the first protrusion of the first formwork frame with the first groove of the second formwork frame, and the engagement of the second protrusion of the second formwork frame with the second groove of the third formwork frame. The overall size of the formwork assembly can be flexibly adjusted by increasing or decreasing the number of second formwork frames to accommodate reinforced concrete hollow sandwich slabs of different specifications. The baffle assembly is detachably connected to the assembled formwork assembly, together forming the mold cavity required for casting the reinforced concrete hollow sandwich slab. Through the design of this structure, the precise matching of protrusions and grooves between the formwork components ensures high accuracy in positioning dimensions. The modular and standardized design of the formwork assembly and the baffle assembly, along with their detachable connection characteristics, significantly improves the standardization and reusability of the formwork. The flexible size adjustment of the formwork assembly by increasing or decreasing the number of second formwork frames enhances adaptability. The modular structure and standardized assembly improve reusability and reduce construction time and costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of an assembly structure of the present invention;

[0021] Figure 3 This is an exploded structural diagram of a mold frame assembly of this utility model;

[0022] Figure 4 This is a schematic diagram of one structure of the side baffle of this utility model;

[0023] Figure 5 This is a schematic diagram of one possible support structure of the present invention;

[0024] Figure 6 This is a schematic diagram of a hollow web plate according to the present invention;

[0025] Figure 7 This is a schematic diagram of the steel mesh structure of the hollow web plate of this utility model.

[0026] In the picture:

[0027] 100-Mold frame assembly, 110-First mold frame, 111-First protrusion, 120-Second mold frame, 121-First recess, 122-Second protrusion, 130-Third mold frame, 131-Second recess, 140-Casting mold cavity, 141-First mold cavity, 142-Second mold cavity, 143-Third mold cavity, 150-Column;

[0028] 200-Baffle assembly, 210-Side baffle, 211-Rib hole, 220-Support structure, 221-First trapezoidal plate, 222-Second trapezoidal plate, 223-Third trapezoidal plate, 224-Fourth trapezoidal plate, 225-Fifth trapezoidal plate, 226-Sixth trapezoidal plate, 227-First reinforcing rib, 228-Second reinforcing rib, 230-Thin plate baffle, 231-U-shaped slot hole;

[0029] 300 - Hollow web plate, 310 - Upper rib, 320 - Shear key, 330 - Lower rib, 340 - Upper surface thin plate, 350 - Upper rib reinforcement, 360 - Lower rib reinforcement, 370 - Thin plate reinforcement. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] Reference Figures 1 to 7As shown, this utility model discloses a modular cast-in-place mold for reinforced concrete hollow sandwich slabs, used for casting hollow slabs 400. Specifically, the hollow slab 400 consists of, from top to bottom, an upper surface thin plate 340, an upper rib 310, a shear key 320, and a lower rib 330. Thin plate reinforcement 370 is intersected in the upper surface thin plate 340, upper rib reinforcement 350 is provided in the upper rib 310, stirrups are provided in the shear key 320, and lower rib reinforcement 360 is provided in the lower rib 330. The modular cast-in-place mold for reinforced concrete hollow sandwich slabs includes a mold frame assembly 100 and a baffle assembly 200. The mold frame assembly 100 is provided with a first mold frame 110, a second mold frame 120 and a third mold frame 130; at least one second mold frame 120 is provided; one end of the first mold frame 110 is provided with a first protrusion 111, one end of the second mold frame 120 is provided with a first groove 121 corresponding to the first protrusion 111, the other end of the second mold frame 120 is provided with a second protrusion 122, and one end of the third mold frame 130 is provided with a second groove 131 corresponding to the second protrusion 122; the baffle assembly 200 and the mold frame assembly 100 are detachably connected to form a casting mold cavity 140. Specifically, in this solution, the mold frame assembly 100 achieves precise connection and positioning of the first mold frame 110, the second mold frame 120, and the third mold frame 130 through the engagement of the first protrusion 111 of the first mold frame 110 with the first groove 121 of the second mold frame 120, and the engagement of the second protrusion 122 of the second mold frame 120 with the second groove 131 of the third mold frame 130. By increasing or decreasing the number of second mold frames 120, the overall size of the mold frame assembly 100 can be flexibly adjusted to adapt to different specifications of reinforced concrete hollow sandwich panels. The baffle assembly 200 is detachably connected to the assembled mold frame assembly 100, and together they enclose the mold cavity required for casting reinforced concrete hollow sandwich panels. Through the design of this structure, the formwork components 100 are connected by precisely matched protrusions and grooves, ensuring high precision in positioning dimensions. The modular and standardized design of the formwork components 100 and the baffle components 200, as well as their detachable connection characteristics, significantly improve the standardization and reusability of the template. The formwork components 100 can be flexibly adjusted in size by adding or removing the number of second formwork components 120, enhancing adaptability. The modular structure and standardized assembly improve reusability and reduce construction cycle and construction costs.

[0035] In some embodiments of this utility model, the cross-sections of the first protrusion 111, the first groove 121, the second protrusion 122, and the second groove 131 are all isosceles triangular structures. Specifically, in this embodiment, the first mold frame 110 in the mold frame assembly 100 is connected to the first groove 121 of the second mold frame 120, which has an isosceles triangular cross-section, through a first protrusion 111 of its cross-section being an isosceles triangular structure. The second mold frame 120 is connected to the second groove 131 of the third mold frame 130, which has an isosceles triangular cross-section, through a second protrusion 122 of its cross-section being an isosceles triangular structure. Automatic alignment and tight engagement are achieved through the inclined contact of the isosceles triangular cross-sections, ensuring that the first mold frame 110, the second mold frame 120, and the third mold frame 130 obtain accurate positioning and stable rigid connection during splicing. The overall length of the mold frame assembly 100 can be flexibly adjusted by increasing or decreasing the number of second mold frames 120 to meet the casting requirements of reinforced concrete hollow sandwich slabs of different specifications. The baffle assembly 200 is detachably connected to the assembled mold frame assembly 100, together forming a closed reinforced concrete hollow sandwich slab casting mold cavity 140. The advantages of this modular cast-in-place formwork for reinforced concrete hollow sandwich panels are as follows: the protruding and recessed parts of the isosceles triangular cross-section significantly improve the positioning accuracy and assembly efficiency of the interlocking connection through the inclined plane guidance and self-locking characteristics, effectively overcoming the problem of low positioning dimensional accuracy of traditional wooden formwork; the standardized and modular design of the formwork frame assembly 100 and the baffle assembly 200, as well as their detachable connection method, greatly improve the standardization and reusability of the formwork; by increasing or decreasing the number of the second formwork frame 120, the size of the formwork frame assembly 100 can be continuously adjusted, enhancing the adaptability of the formwork to different engineering needs; through the design of this structure, the formwork support time is significantly shortened and the construction cost is reduced.

[0036] In some embodiments of this utility model, the cross-sections of the first protrusion 111, the first groove 121, the second protrusion 122, and the second groove 131 are all isosceles trapezoidal structures. Specifically, in this embodiment, the use of an isosceles trapezoid not only provides a guiding function but also reduces the risk of deformation of the ends of the first and second protrusions due to the concentrated size at the ends.

[0037] In some embodiments of this utility model, the casting mold cavity 140 includes a first mold cavity 141, a second mold cavity 142 and a third mold cavity 143. The first mold cavity 141 is used to form the upper rib 310 of the hollow plate 400, the second mold cavity 142 is used to form the shear key 320 of the hollow plate 400, and the third mold cavity 143 is used to form the lower rib 330 of the hollow plate 400. Specifically, in this embodiment, from top to bottom, the components are an upper surface thin plate 340, an upper rib 310, a shear key 320, and a lower rib 330. The mold frame assembly 100 is rigidly spliced ​​by the engagement of the first protrusion 111 of the first mold frame 110 with the first groove 121 of the second mold frame 120, and the engagement of the second protrusion 122 of the second mold frame 120 with the second groove 131 of the third mold frame 130, forming a continuous integral frame. The spliced ​​first mold frame 110, second mold frame 120, and third mold frame 130 together constitute a first mold cavity 141, a second mold cavity 142, and a third mold cavity 143. The first mold cavity 141 is used to form the upper rib 310 of the hollow web plate 400, and the second mold cavity 142 is used to form the hollow web plate 400. The shear key 320 of the web plate 400 and the third mold cavity 143 are used to form the lower rib 330 of the hollow web plate 400; the baffle assembly 200 is detachably connected to the mold frame assembly 100 to form a complete casting mold cavity 140 containing the above three mold cavities; after the concrete is poured, the upper rib 310 formed by the first mold cavity 141 contains the upper rib reinforcement 350, the shear key 320 formed by the second mold cavity 142 contains the stirrups, and the lower rib 330 formed by the third mold cavity 143 places the lower rib reinforcement 360. At the same time, thin plate reinforcement 370 is laid crosswise in the area of ​​the upper surface thin plate 340, and finally a reinforced concrete hollow sandwich slab integral structure is formed by the upper surface thin plate 340, the upper rib 310, the shear key 320 and the lower rib 330. The advantages of this modular cast-in-place mold for reinforced concrete hollow sandwich panels are as follows: the mold frame assembly 100 achieves high-precision self-positioning and splicing through the protrusions and grooves of the isosceles triangular cross section, ensuring that the spatial positions of the first mold cavity 141, the second mold cavity 142, and the third mold cavity 143 accurately correspond to the design positions of the upper rib 310, shear key 320, and lower rib 330 of the hollow sandwich panel 400, thus guaranteeing the structural forming accuracy; the integrated synchronous forming design of the three mold cavities avoids layered casting errors and ensures the structural integrity of the upper rib 310, shear key 320, and lower rib 330; the modular assembly method allows for flexible adjustment of the mold cavity size by adding or removing the second mold frame 120 to adapt to the production needs of hollow sandwich panels 400 of different specifications; the standardized and detachable structure of the mold frame assembly 100 and the baffle assembly 200 significantly improves the template reuse rate, shortens the formwork support cycle, and comprehensively reduces construction costs.

[0038] In some embodiments of this utility model, the baffle assembly 200 includes a side baffle 210, and the side baffle 210 is provided with rib holes 211 at the first mold cavity 141 and the third mold cavity 143. The rib holes 211 are used to place the upper rib 350 and the lower rib 360. Specifically, in this embodiment, the mold frame assembly 100 is rigidly spliced ​​by the engagement of the first protrusion 111 of the first mold frame 110 with the first groove 121 of the second mold frame 120, and the engagement of the second protrusion 122 of the second mold frame 120 with the second groove 131 of the third mold frame 130, forming a continuous integral frame. The spliced ​​first mold frame 110, second mold frame 120, and third mold frame 130 together constitute the first mold cavity 141, the second mold cavity 142, and the third mold cavity 143, wherein the first mold cavity 141 is used to form the upper rib 310 of the hollow web plate 400, the second mold cavity 142 is used to form the shear key 320 of the hollow web plate 400, and the third mold cavity 143 is used to form the lower rib 330 of the hollow web plate 400. The side baffle 210 in the baffle assembly 200 is detachable from the mold frame assembly 100. The three mold cavities are connected and closed to form a complete casting mold cavity 140 containing the above three parts. The side baffle 210 is provided with rib holes 211 at corresponding positions in the first mold cavity 141 and the third mold cavity 143 for accurately placing the upper rib 350 and the lower rib 360. After the concrete is poured, the upper rib 310 formed by the first mold cavity 141 houses the upper rib 350 positioned by the upper rib hole 211, the shear key 320 formed by the second mold cavity 142 houses the stirrups, and the lower rib 330 formed by the third mold cavity 143 houses the lower rib 360 positioned by the lower rib hole 211. At the same time, thin plate reinforcement 370 is laid crosswise in the area of ​​the upper surface thin plate 340, and finally a reinforced concrete hollow sandwich slab integral structure is formed, consisting of the upper surface thin plate 340, the upper rib 310, the shear key 320 and the lower rib 330. The advantages of this modular cast-in-place mold for reinforced concrete hollow sandwich slabs are as follows: the mold frame assembly 100 achieves high-precision self-positioning and splicing through the protruding and recessed parts of the isosceles triangular cross section, ensuring that the spatial positions of the first mold cavity 141, the second mold cavity 142, and the third mold cavity 143 accurately correspond to the designed positions of the upper rib 310, the shear key 320, and the lower rib 330 of the hollow slab 400; the rib holes 211 pre-set in the side baffle 210 directly provide standardized positioning channels for the upper rib 350 and the lower rib 360, ensuring... The design ensures the accuracy of steel reinforcement arrangement and the reliability of structural stress; the integrated synchronous molding design of the three-part mold cavity avoids layered casting errors and ensures the structural integrity of the upper rib 310, shear key 320 and lower rib 330; the modular assembly method allows for flexible adjustment of the mold cavity size by adding or removing the second mold frame 120 to adapt to the production needs of different specifications of hollow slab 400; the standardized and detachable structure of the mold frame assembly 100 and the baffle assembly 200 significantly improves the reuse rate of the template, shortens the formwork support cycle, and comprehensively reduces construction costs.

[0039] In some embodiments of this utility model, the baffle assembly 200 includes a support structure 220 circumferentially disposed in the second mold cavity 142. The support structure 220 is formed by sequentially splicing a first trapezoidal plate 221, a second trapezoidal plate 222, a third trapezoidal plate 223, a fourth trapezoidal plate 224, a fifth trapezoidal plate 225, and a sixth trapezoidal plate 226 to form a U-shaped structure. Specifically, in this embodiment, the hollow plate 400 consists of an upper surface thin plate 340, an upper rib 310, a shear key 320, and a lower rib 330 from top to bottom. The first trapezoidal plate 221 and the second trapezoidal plate 222 close the upper end face of the lower rib 330, the third trapezoidal plate 223 and the fourth trapezoidal plate 224 close the side wall of the shear key 320, and the fifth trapezoidal plate 225 and the sixth trapezoidal plate 226 close the lower end face of the upper rib 310. In this embodiment, the first trapezoidal plate 221, the second trapezoidal plate 222, the third trapezoidal plate 223, the fourth trapezoidal plate 224, the fifth trapezoidal plate 225 and the sixth trapezoidal plate 226 all adopt a trapezoidal plate structure, which facilitates the removal of the trapezoidal plate in the horizontal direction during demolding and reduces the assembly and disassembly cycle of the mold.

[0040] In some embodiments of this utility model, the second trapezoidal plate 222 is perpendicular to the third trapezoidal plate 223, and the fourth trapezoidal plate 224 is perpendicular to the fifth trapezoidal plate 225; a first reinforcing rib 227 is provided between the second trapezoidal plate 222 and the third trapezoidal plate 223; a second reinforcing rib 228 is provided between the fourth trapezoidal plate 224 and the fifth trapezoidal plate 225. Specifically, in this embodiment, the second trapezoidal plate 222 and the third trapezoidal plate 223 are integrally formed by welding, and the fourth trapezoidal plate 224 and the fifth trapezoidal plate 225 are integrally formed by welding. Through the design of this structure, the stability and structural strength of the support and protection can be improved. On this basis, the stability can be further improved by providing the first reinforcing rib 227 and the second reinforcing rib 228.

[0041] In some embodiments of this utility model, a thin plate baffle 230 is circumferentially provided on the upper end face of the mold frame assembly 100 of the baffle assembly 200. The thin plate baffle 230 is used to form the upper surface thin plate 340 of the hollow plate 400. Specifically, in this embodiment, the hollow plate 400 consists of an upper surface thin plate 340, an upper rib 310, a shear key 320, and a lower rib 330 from top to bottom. The mold frame assembly 100 is rigidly spliced ​​by the first protrusion 111 of the first mold frame 110 engaging with the first groove 121 of the second mold frame 120, and the second protrusion 122 of the second mold frame 120 engaging with the second groove 131 of the third mold frame 130, forming a continuous integral frame. The spliced ​​first mold frame 110, second mold frame 120, and third mold frame 130 are rigidly spliced ​​together to form a continuous integral frame. The three cavities 141, 142, and 143 together form the first mold cavity 141, the second mold cavity 142, and the third mold cavity 143. The first mold cavity 141 is used to form the upper rib 310 of the hollow web 400, the second mold cavity 142 is used to form the shear key 320 of the hollow web 400, and the third mold cavity 143 is used to form the lower rib 330 of the hollow web 400. The side baffle 210 in the baffle assembly 200 is detachably connected to the mold frame assembly 100, closing to form a complete casting mold cavity 140 containing the above three mold cavities. The side baffle 210 is located in the first mold cavity 141 and the third mold cavity 143. Rib holes 211 are provided at corresponding positions in cavity 143 for positioning upper ribs 350 and lower ribs 360; the baffle assembly 200 is provided with a U-shaped support structure 220 in the circumference of the second mold cavity 142, which is formed by sequentially splicing a first trapezoidal plate 221, a second trapezoidal plate 222, a third trapezoidal plate 223, a fourth trapezoidal plate 224, a fifth trapezoidal plate 225 and a sixth trapezoidal plate 226; at the same time, the baffle assembly 200 is provided with a thin plate baffle 230 in the circumference of the upper end face of the mold frame assembly 100 for forming the upper surface of the hollow plate 400. In the thin slab 340 area, after concrete pouring, the upper rib 310 with built-in upper ribs 350 is formed through the first mold cavity 141, the shear key 320 with built-in stirrups is formed through the second mold cavity 142, the lower rib 330 with built-in lower ribs 360 is formed through the third mold cavity 143, and the upper surface thin slab 340 with cross-laid thin slab reinforcements 370 is formed through the thin slab baffle 230, finally forming an integral structure of reinforced concrete hollow sandwich slab composed of upper surface thin slab 340, upper rib 310, shear key 320 and lower rib 330.Through the design of this structure, the mold frame assembly 100 achieves high-precision self-positioning and splicing through the protrusions and grooves of the isosceles triangular cross section, ensuring that the spatial positions of the first mold cavity 141, the second mold cavity 142, and the third mold cavity 143 accurately correspond to the design positions of each structural layer of the web plate 400; the rib holes 211 pre-set in the side baffle 210 ensure the positioning accuracy of the upper rib 350 and the lower rib 360; the circumferential U-shaped support structure 220 of the second mold cavity 142 enhances the deformation resistance of the shear key 320 forming area; the thin plate baffle 230 independently controls the thickness and boundary accuracy of the upper surface thin plate 340; all mold cavities and the upper surface thin plate 340 are integrally and synchronously formed, avoiding layering errors and ensuring the integrity of the structure; the modular assembly design allows for flexible adjustment of the mold cavity size by adding or removing the second mold frame 120 to meet the production needs of different specifications of web plates 400; the standardized and detachable structure of the mold frame assembly 100 and the baffle assembly 200 significantly improves the template reuse rate, shortens the formwork support cycle, and comprehensively reduces construction costs.

[0042] In some embodiments of this utility model, the thin plate baffle 230 is formed by splicing together several angle steels, and the thin plate baffle 230 is provided with several U-shaped slots 231, which are used to place the thin plate reinforcing bars 370. Specifically, in this embodiment, the baffle assembly 200 is provided with a thin plate baffle 230 formed by splicing several angle steels on the circumferential direction of the upper end face of the formwork assembly 100. This baffle is used to form the upper surface thin plate 340 area of ​​the hollow web 400. The thin plate baffle 230 is provided with several U-shaped slots 231 for precise placement of the thin plate reinforcement 370. After the concrete is poured, the thin plate baffle 230 forms the upper surface thin plate 340 with the thin plate reinforcement 370 positioned by the U-shaped slots 231 inside. Finally, a standardized positioning channel is formed by the upper surface thin plate 340 and the U-shaped slots 231 for the thin plate reinforcement 370, ensuring the accuracy of the thin plate reinforcement arrangement and the control of the protective layer thickness. This meets the production needs of hollow web 400 of different specifications. The standardized and detachable structure of the formwork assembly 100 and the baffle assembly 200 significantly improves the reuse rate of the formwork, shortens the formwork support cycle, and comprehensively reduces the construction cost.

[0043] In some embodiments of this utility model, a plurality of columns 150 are provided at the connection points of the first mold frame 110, the second mold frame 120, and the third mold frame 130. Specifically, in this embodiment, by providing columns 150, the structural strength and rigidity of the joints of the first mold frame 110, the second mold frame 120, and the third mold frame 130 can be improved.

[0044] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A modular formwork for cast-in-situ construction of reinforced concrete open-web sandwich panels, characterised in that, include: A mold frame assembly (100) is provided with a first mold frame (110), a second mold frame (120) and a third mold frame (130); at least one second mold frame (120) is provided; one end of the first mold frame (110) is provided with a first protrusion (111), one end of the second mold frame (120) is provided with a first groove (121) corresponding to the first protrusion (111), the other end of the second mold frame (120) is provided with a second protrusion (122), and one end of the third mold frame (130) is provided with a second groove (131) corresponding to the second protrusion (122). A baffle assembly (200) is detachably connected to the mold frame assembly (100) for forming a casting cavity (140).

2. The modular cast-in-place mold for reinforced concrete hollow sandwich slabs according to claim 1, characterized in that, The cross-sections of the first protrusion (111), the first groove (121), the second protrusion (122), and the second groove (131) are all isosceles triangular structures.

3. The reinforced concrete empty-web sandwich panel modular cast-in-situ formwork according to claim 1, characterized in that, The cross-sections of the first protrusion (111), the first groove (121), the second protrusion (122), and the second groove (131) are all isosceles trapezoidal structures.

4. The reinforced concrete empty-web sandwich panel modular cast-in-situ formwork according to claim 1, characterized in that, The casting mold cavity (140) includes a first mold cavity (141), a second mold cavity (142), and a third mold cavity (143). The first mold cavity (141) is used to form the upper rib (310) of the hollow plate (400), the second mold cavity (142) is used to form the shear key (320) of the hollow plate (400), and the third mold cavity (143) is used to form the lower rib (330) of the hollow plate (400).

5. A reinforced concrete hollow sandwich panel modular cast-in-situ formwork according to claim 4, characterised in that, The baffle assembly (200) includes a side baffle (210), which has rib holes (211) at the first mold cavity (141) and the third mold cavity (143). The rib holes (211) are used to place the upper rib (350) and the lower rib (360).

6. A reinforced concrete hollow sandwich panel modular cast-in-situ formwork according to claim 5, characterised in that, The baffle assembly (200) includes a support structure (220) arranged circumferentially in the second mold cavity (142). The support structure (220) is formed by sequentially splicing a first trapezoidal plate (221), a second trapezoidal plate (222), a third trapezoidal plate (223), a fourth trapezoidal plate (224), a fifth trapezoidal plate (225), and a sixth trapezoidal plate (226) to form a U-shaped structure.

7. A reinforced concrete hollow-web sandwich panel modular cast-in-situ formwork according to claim 6, characterised in that, The second trapezoidal plate (222) is perpendicular to the third trapezoidal plate (223), and the fourth trapezoidal plate (224) is perpendicular to the fifth trapezoidal plate (225); a first reinforcing rib (227) is provided between the second trapezoidal plate (222) and the third trapezoidal plate (223); a second reinforcing rib (228) is provided between the fourth trapezoidal plate (224) and the fifth trapezoidal plate (225).

8. A reinforced concrete hollow-web sandwich panel modular cast-in-situ formwork according to claim 7, characterised in that, The baffle assembly (200) has a thin plate baffle (230) circumferentially arranged on the upper end face of the mold frame assembly (100), and the thin plate baffle (230) is used to form the upper surface thin plate (340) of the hollow plate (400).

9. A reinforced concrete hollow sandwich panel modular cast-in-situ formwork according to claim 8, characterised in that, The thin plate baffle (230) is formed by splicing several angle steels. The thin plate baffle (230) is provided with several U-shaped slots (231), which are used to place thin plate reinforcing bars (370).

10. The modular cast-in-place mold for reinforced concrete hollow sandwich slabs according to claim 9, characterized in that, Several columns (150) are provided at the connection points of the first mold frame (110), the second mold frame (120) and the third mold frame (130).

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