Formwork cover beam secondary pouring structure and construction method thereof
By using the breasted surface of the inner side of the shell concrete, the embedded steel cage and corrugated pipe in the mold shell cover beam structure, and reserved installation space in the core concrete steel bars to penetrate the existing corrugated pipe, the problems of the core concrete steel bar binding process and the positioning connection of the prestressed pipeline of the mold shell cover beam are solved, and efficient steel bar binding and prestressed pipeline connection are achieved.
Patent Information
- Application Number
- CN202510090204.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-04-18
AI Technical Summary
The existing technology is difficult to effectively solve the problem of the bonding process of the core concrete steel bars of the mold shell cover beam, especially the problem of the inability to tie and position the prestressed pipeline and the connection between the new and old prestressed pipelines under the limitation of the shell side wall.
A secondary cast structure of mold-shell cover beam is adopted, including shell concrete and inner mold. The inner side of the shell concrete is provided with a breasted surface, embedded steel cage and corrugated pipe, square stirrups are tied to the steel cage, core concrete steel bars are overlapped and welded with the main bars of shell concrete, and installation space is reserved in the middle to connect the existing corrugated pipe with the embedded corrugated pipe.
By quickly forming the concrete rough surface of the shell and increasing the anchoring force of the core concrete steel bars, the problem of steel bar binding process is solved, and the positioning of prestressed pipelines and the connection between new and old prestressed pipelines is realized during the steel bar binding process, improving construction efficiency and effect.
Smart Images
Figure CN119843573A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field, and in particular to a secondary casting structure of a formwork cap beam and a construction method thereof. Background Art
[0002] At present, the core concrete of the shell cap beam is poured twice. The shell concrete is constructed first, and then the shell concrete is used as a mold for the core concrete construction. The main reinforcement and prestressed pipes are partially embedded in the shell concrete. When the core concrete is constructed, the reinforcement and prestressed pipes must be constructed in the shell, and conventional construction methods cannot be used.
[0003] Existing concrete components usually use the method of tying the steel cage first and then installing the mold, or tying the steel cage and then hoisting it into the installed mold. According to the working conditions of the mold shell, it is also necessary to solve the connection problem between the new and old concrete, the new and old steel bars, and the new and old prestressed pipes. The existing two conventional methods can no longer meet the construction requirements. The usual method of roughening the joint surface between the new and old concrete and adding sleeves for secondary anchoring is roughening. Roughening causes pollution and consumes labor, and the secondary anchoring of pre-buried sleeves will increase investment due to the large number. Summary of the invention
[0004] The present application provides a secondary casting structure of a formwork cap beam to solve the problem of the steel bar binding process of the core concrete. If the stirrups are tied first and then the main bars are inserted, they will be restricted by the side walls of the shell and cannot be tied. There are also problems with the positioning of prestressed pipes and the connection of new and old prestressed pipes.
[0005] In order to solve the above technical problems, the present application provides a secondary casting structure of a formwork cap beam, comprising: shell concrete and an inner mold arranged in the shell concrete; the inner side surface of the shell concrete is set as a rough surface, a steel cage and a pre-embedded corrugated pipe are arranged in the shell concrete, square stirrups are longitudinally tied with square stirrups at intervals, the square steel bars are set as free edges on the side close to the inner mold, and the free edges of the square stirrups are exposed to the outside of the inner side surface of the shell concrete, core concrete steel bars are tied in the shell concrete, the main bars of the core concrete steel bars and the main bars of the shell concrete are overlapped and welded and fixed, a plurality of stirrups are fixed on the main bars of the core concrete steel bars, an installation space is reserved in the middle of the core concrete steel bars, an existing corrugated pipe is passed through the installation space, and the existing corrugated pipe and the pre-embedded corrugated pipe are butt-jointed.
[0006] In some embodiments of the present application, the square stirrups on both sides are arranged in parallel in 3 groups, the center vertical spacing distance of the square stirrups on both sides is 250mm, and the free end of any square stirrup on both sides is bent at 90°. The bottom square stirrups are arranged in parallel in 2 groups, the center horizontal spacing distance of the bottom square stirrups is 300mm, and the bottom square stirrups are higher than the bottom slab concrete surface when tied, and are directly exposed when pouring the shell concrete.
[0007] In some embodiments of the present application, a sleeve is provided at the joint between the pre-buried corrugated pipe and the existing corrugated pipe. The sleeve is a corrugated pipe, the inner diameter of the sleeve is not less than the outer diameter of the existing corrugated pipe, and both ends of the sleeve are wrapped with tape.
[0008] In some embodiments of the present application, the inner mold of the shell concrete is sprayed with a roughening agent.
[0009] In some embodiments of the present application, a plurality of positioning meshes are arranged at intervals in the length direction of the core concrete, and the longitudinal spacing of the positioning meshes is 500 mm.
[0010] In some embodiments of the present application, the installed corrugated pipe is inserted into the preset mesh of the positioning mesh.
[0011] In some embodiments of the present application, the outer width of the shell concrete is 835 mm, and the inner width of the shell concrete is 575 mm.
[0012] In some embodiments of the present application, a construction method of a secondary casting structure of a formwork cap beam is provided, and the specific steps of the construction method are as follows: Step 1, according to the connection requirements of the shell concrete and the core concrete, square stirrups are tied at appropriate positions of the side walls, and the free ends of the square stirrups are placed close to the inner form; Step 2: During the shell concrete construction, adjust the position of the steel cage, spray a roughening agent on the inner mold of the shell concrete, and use a high-pressure water gun to flush the rough surface immediately after the mold is removed to form a rough surface and expose the square stirrups; Step 3: Determine the position of each square stirrup of the side wall, chisel the free end of the square stirrup, and use a special tool to bend the square stirrup to 90 degrees to form an anchoring steel bar; Step 4: Cut the core concrete steel bars according to the drawings, overlap and weld the main bars with the pre-embedded steel bars of the shell near the base. The other end of the main bars is the free end. Insert the stirrups along the free ends of the main bars in turn, and fix them accurately and firmly according to the specified size. The stirrups are pushed from one side close to the base to the other side. When tying the stirrups, place the positioning mesh at the pre-set position. The positioning mesh and stirrups are firmly tied. The longitudinal spacing of the positioning mesh is 500mm. Step 5: When the stirrups are tied to a position not less than 500 mm from the end of the shell concrete, stop tying the stirrups, and the operator walks out of the shell to start threading the installed corrugated pipe. The installed corrugated pipe is threaded in the space left by the core concrete steel bars. When the installed corrugated pipe is in place, it is butt-jointed with the embedded corrugated pipe, and at the same time, a sleeve with an inner diameter not less than the outer diameter of the installed corrugated pipe is inserted, and it is sealed with adhesive tape to prevent concrete slurry from leaking into the pipeline. Step six, perform additional binding for the remaining steel bars. Before binding, perform lap welding on the free ends of the main bars and the steel bars pre-embedded in the shell.
[0013] Compared with the prior art, the present invention has the following characteristics and beneficial effects: The inner side surface of the shell concrete of the present invention quickly forms a rough surface, and the pre-embedded steel bars and the core concrete increase the anchoring force, thereby solving the problem of the steel bar binding process of the core concrete. If the stirrups are tied first and then the main bars are inserted, they will be restricted by the side walls of the shell and cannot be tied. The method can avoid this, and the existing corrugated pipes are inserted and installed during the steel bar binding process, thereby solving the problems of prestressed pipe positioning and the connection between new and old prestressed pipes. Popularization and use can produce better results. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic side view of the overall structure of an embodiment of the present invention; Figure 2 is a schematic cross-sectional view of the installation space of an embodiment of the present invention; Figure 3 This is a schematic diagram of the arrangement of the positioning mesh according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the installation of square stirrups according to an embodiment of the present invention; Figure 5 Schematic diagram of concrete reinforcement of a shell according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the inner mold installation of an embodiment of the present invention.
[0015] In the figure, 100, shell concrete; 200, inner formwork; 300, square stirrups; 400, core concrete reinforcement; 410, installation space; 420, existing corrugated pipe; 500, positioning mesh. DETAILED DESCRIPTION
[0016] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0017] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0018] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.
[0019] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0020] like Figure 1-6 As shown, according to some embodiments of the present application, a secondary casting structure of a formwork cap beam includes: a shell concrete 100 and an inner mold 200 arranged in the shell concrete 100; the inner side surface of the shell concrete 100 is set to a rough surface, a steel cage and a pre-buried corrugated pipe are arranged in the shell concrete 100, square stirrups 300 are longitudinally spaced on the steel cage, and the end of the square steel bar away from the steel cage is set as a free edge, and the free edge of the square stirrup 300 is exposed to the outside of the inner side surface of the shell concrete 100, and core concrete steel bars 400 are tied in the shell concrete 100, and the main bars of the core concrete steel bars 400 and the main bars of the shell concrete 100 are overlapped and welded and fixed, and a plurality of stirrups are fixed on the main bars of the core concrete steel bars 400, and an installation space 410 is reserved in the middle of the core concrete steel bars 400, and an existing corrugated pipe 420 is passed through the installation space 410, and the existing corrugated pipe 420 and the pre-buried corrugated pipe are connected.
[0021] According to some embodiments of the present application, the square stirrups 300 on both sides are arranged in parallel into 3 groups, the vertical spacing distance between the centers of the square stirrups 300 on both sides is 250 mm, the free ends of any square stirrup 300 on both sides are bent at 90°, the bottom square stirrups 300 are arranged in parallel into 2 groups, the horizontal spacing distance between the centers of the bottom square stirrups 300 is 300 mm, and the bottom square stirrups are higher than the bottom slab concrete surface when tied and are directly exposed when pouring concrete.
[0022] According to some embodiments of the present application, a sleeve is provided at the joint between the pre-buried bellows and the existing bellows 420. The sleeve is a bellows, and the inner diameter of the sleeve is not less than the outer diameter of the existing bellows 420. Both ends of the sleeve are wrapped with tape.
[0023] According to some embodiments of the present application, a roughening agent is sprayed on the side of the inner mold 200 of the shell concrete 100 .
[0024] According to some embodiments of the present application, a plurality of positioning meshes 500 are arranged at intervals in the length direction of the core concrete.
[0025] According to some embodiments of the present application, the installed bellows 420 is inserted into the mesh of the preset positioning mesh 500 .
[0026] According to some embodiments of the present application, the outer width of the shell concrete 100 is 835 mm, and the inner width of the shell concrete 100 is 575 mm.
[0027] According to some embodiments of the present application, a construction method of a secondary casting structure of a formwork cap beam is provided, and the specific steps of the construction method are as follows: Step 1, according to the connection requirements of the shell concrete 100 and the core concrete, square stirrups 300 are tied at appropriate positions of the side walls, and the free ends of the square stirrups 300 are close to the inner form 200; Step 2: When the shell concrete 100 is constructed, the position of the steel cage is adjusted, and a roughening agent is sprayed on the inner mold 200 of the shell concrete 100. After the mold is removed, a high-pressure water gun is used to flush the rough surface to form a rough surface and expose the square stirrups 300. Step 3: determine the position of each square stirrup 300 of the side wall, chisel the free end of the square stirrup 300, and use a special tool to bend the square stirrup 300 to 90 degrees to form an anchoring steel bar; Step 4: Cut the core concrete steel bars 400 according to the drawings, overlap and weld the main bars with the pre-buried steel bars of the shell near the base, the other end of the main bars is a free end, insert the stirrups along the free ends of the main bars in turn, and fix them accurately and firmly according to the specified size. The stirrups are pushed from one side close to the base to the other side. When tying the stirrups, place the positioning mesh 500 at the pre-set position, and the positioning mesh 500 is firmly tied to the stirrups. The longitudinal spacing of the positioning mesh 500 is 500mm. Step 5: When the stirrups are tied to a position not less than 500 mm from the end of the shell concrete 100, the stirrups are stopped, and the operator walks out of the shell and starts to pass the existing corrugated pipe 420. The existing corrugated pipe 420 is passed through the space left by the core concrete steel bars 400. When the existing corrugated pipe 420 is in place, it is connected with the embedded corrugated pipe, and at the same time, a sleeve with an inner diameter not less than the outer diameter of the existing corrugated pipe 420 is inserted, and it is sealed with adhesive tape to prevent concrete slurry from leaking into the pipeline. Step six, arrange the positioning mesh 500 at the installation position of the existing corrugated pipe 420, and firmly tie the positioning mesh 500 and the existing corrugated pipe 420, and supplement the remaining steel bars. Before tying, overlap and weld the free end of the main reinforcement with the steel bar embedded in the shell at the end.
[0028] In summary, the present invention relates to the technical field of cap beam concrete construction, and discloses a secondary casting structure of a formwork cap beam and a construction method thereof, comprising: shell concrete and an inner mold arranged in the shell concrete; the inner side surface of the shell concrete is set as a rough surface, a steel cage and a pre-embedded corrugated pipe are arranged in the shell concrete, square stirrups are longitudinally tied with the steel cage at intervals, one end of the square steel bar away from the steel cage is set as a free edge, the free edge of the square stirrup is exposed to the outside of the inner side surface of the shell concrete, core concrete steel bars are tied in the shell concrete, the main bars of the core concrete steel bars and the main bars of the shell concrete are overlapped and welded and fixed, a plurality of stirrups are fixed on the main bars of the core concrete steel bars, an installation space is reserved in the middle of the core concrete steel bars, an existing corrugated pipe is passed through the installation space, and the existing corrugated pipe and the pre-embedded corrugated pipe are butt-jointed.
[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.
Claims
1. A secondary casting structure of a formwork cap beam, comprising: A shell concrete (100) and an inner mold (200) arranged in the shell concrete (100); characterized in that the inner side surface of the shell concrete (100) is set as a rough surface, a steel cage and a pre-buried corrugated pipe are arranged in the shell concrete (100), square stirrups (300) are longitudinally spaced and tied on the steel cage, and the side of the square steel bar close to the inner mold (200) is set as a free edge, and the free edge of the square stirrup (300) is exposed to the outside of the inner side surface of the shell concrete (100), and the shell A core concrete steel bar (400) is tied inside the body concrete (100), the main bars of the core concrete steel bar (400) and the main bars of the shell concrete (100) are overlapped and welded, a plurality of stirrups are fixed on the main bars of the core concrete steel bar (400), an installation space (410) is reserved in the middle of the core concrete steel bar (400), an existing corrugated pipe (420) is inserted into the installation space (410), and the existing corrugated pipe (420) and the pre-buried corrugated pipe are butt-jointed.
2. A secondary casting structure of formwork cap beam according to claim 1, characterized in that: The square stirrups (300) on both sides are arranged in parallel in 3 groups, the center vertical spacing distance of the square stirrups (300) on both sides is 250mm, and the free end of any square stirrup (300) on both sides is bent at 90°. The bottom square stirrups (300) are arranged in parallel in 2 groups, the center horizontal spacing distance of the bottom square stirrups (300) is 300mm, and the bottom square stirrups are higher than the bottom slab concrete surface when tied, and are directly exposed when pouring concrete.
3. A secondary casting structure of formwork cap beam according to claim 1, characterized in that: A sleeve is provided at the joint between the pre-buried corrugated pipe and the existing corrugated pipe (420), wherein the sleeve is a corrugated pipe, the inner diameter of the sleeve is not less than the outer diameter of the existing corrugated pipe (420), and adhesive tape is wrapped around both ends of the sleeve.
4. The secondary casting structure of the formwork cap beam according to claim 1, characterized in that: The inner mold (200) of the shell concrete (100) is sprayed with a roughening agent.
5. The secondary casting structure of formwork cap beam according to claim 1, characterized in that: A plurality of positioning meshes (500) are arranged at intervals in the length direction of the core concrete, and the spacing between adjacent positioning meshes (500) is 500 mm.
6. The secondary casting structure of formwork cap beam according to claim 1, characterized in that: The installed corrugated tube (420) is inserted into the mesh of the preset positioning mesh (500).
7. The secondary casting structure of formwork cap beam according to claim 1, characterized in that: The outer width of the shell concrete (100) is 835 mm, and the inner width of the shell concrete (100) is 575 mm.
8. A construction method for a secondary casting structure of a formwork cap beam as claimed in any one of claims 1 to 7, characterized in that: The specific steps of the construction method are as follows: Step 1, according to the connection requirements of the shell concrete (100) and the core concrete, the square stirrups (300) are tied at appropriate positions of the side walls, and the free ends of the square stirrups (300) on both sides are close to the inner mold (200); Step 2: during the construction of the shell concrete (100), the position of the steel cage is adjusted, a roughening agent is sprayed on the inner mold (200) of the shell concrete (100), and after the mold is removed, a high-pressure water gun is used to flush the rough surface to form a rough surface and expose the square stirrups (300); Step 3, determine the position of each square stirrup (300) of the side wall, chisel the free end of the square stirrup (300), use a special tool to bend the square stirrup (300) to 90 degrees, and the bottom square stirrup is higher than the bottom slab concrete surface when tied, and is directly exposed when pouring concrete to form an anchoring steel bar; Step 4: Cut the core concrete steel bars (400) according to the drawings, overlap and weld the main bars with the pre-buried steel bars of the shell near the base, the other end of the main bars is a free end, insert the stirrups along the free ends of the main bars in sequence, and fix them accurately and firmly according to the specified size, and push the stirrups from one side close to the base to the other side; when tying the stirrups, place the positioning mesh (500) at a pre-set position, and the positioning mesh (500) is firmly tied to the stirrups, and the longitudinal spacing of the positioning mesh (500) is 500mm; Step 5: When the stirrups are tied to a position not less than 500 mm from the end of the shell concrete (100), the stirrups are stopped, and the operator walks out of the shell and starts to pass the existing corrugated pipe (420). The existing corrugated pipe (420) is passed through the space left by the core concrete steel bars (400) and penetrates into the mesh of the preset positioning mesh (500). When the existing corrugated pipe (420) is in place, it is butt-jointed with the embedded corrugated pipe, and at the same time, a sleeve with an inner diameter at one end not less than the outer diameter of the existing corrugated pipe (420) is passed through, and is wrapped and sealed with adhesive tape to prevent concrete slurry from leaking into the pipeline; Step six, perform additional binding for the remaining steel bars. Before binding, perform lap welding on the free ends of the main bars and the steel bars pre-embedded in the shell.