Support method for side formwork structure of super-long floor slab casting on both sides of post-casting strip

Abstract

The present invention discloses a method for supporting a side formwork structure for casting an extra-long floor slab on both sides of a post-casting strip, which solves the problems of difficulty in arranging the side formwork of the post-casting strip and non-reusability; abandons the traditional method of using a wire mesh as a side formwork, and designs the side formwork to be a split-jointed splicing type, that is, on the aluminum floor slab casting bottom formwork, L-shaped aluminum angle pieces are arranged at intervals, floor slab steel bars are arranged between two adjacent L-shaped aluminum angle pieces, and the gap between the two adjacent L-shaped aluminum angle pieces is blocked with an upper T-shaped connector to form a closed side formwork; and changes the traditional side formwork arrangement process, after the floor slab bottom formwork is spliced, L-shaped aluminum angle pieces are arranged at intervals on the bottom formwork according to the position of the post-casting strip, and then the integral steel mesh in the floor slab is arranged, and finally the gap between the two adjacent L-shaped aluminum angle pieces is blocked with a T-shaped connector to form a closed side formwork; and the side formwork can be reused.

Description

Technical Field

[0001] The invention relates to a cast-in-place super-long floor slab, and in particular to a side formwork structure on both sides of a post-casting strip and a supporting method thereof when an aluminum formwork bottom formwork is used for casting the super-long floor slab. Background Art

[0002] With the rapid development of the construction industry, more and more large-scale high-rise residential areas and high-tech industrial parks are under construction, resulting in super-long cast-in-place buildings with a length of more than 50 meters. The concrete floor slabs of such super-long cast-in-place buildings are generally cast with aluminum formwork as the bottom formwork for casting the floor slabs. In order to overcome the thermal expansion and contraction of the concrete of super-long floor slabs, a concrete post-cast strip of the cast-in-place floor slab is generally designed at the weak stress point in the middle of the cast-in-place floor slab. However, the steel bars laid on the concrete post-cast strip are laid through in advance together with the steel bars in the cast-in-place floor slabs on both sides. When casting the floor slabs on site, it is required to cast the concrete floor slabs on both sides of the post-cast strip first. After the strength of the concrete floor slabs on both sides reaches the design requirements, the concrete floor slabs at the post-cast strip are poured to overcome the super-long concrete expansion and contraction. The thermal expansion and contraction phenomenon of long floor slab concrete is used to ensure the quality of concrete floor slab pouring; before pouring the concrete of the floor slabs on both sides of the post-cast strip, it is necessary to support the side formwork for pouring the floor slabs on both sides of the post-cast strip to prevent the cast-in-place concrete of the floor slabs on both sides from entering the post-cast strip; since the floor slab steel bars have been laid in the post-cast strip, the formwork on both sides of the post-cast strip cannot be laid out with a whole formwork; the existing technology is to use a dense steel wire mesh to replace the side formwork and set the steel wire mesh on the wooden slats. There is a defect that the layout of the steel wire mesh side formwork is time-consuming and labor-intensive. During the concrete pouring process, there is also the problem that the steel wire mesh is not tightly sealed, which can easily cause a large amount of concrete to leak into the post-cast strip during concrete pouring, requiring subsequent treatment, and this steel mesh post-cast strip side formwork cannot be reused. Summary of the Invention

[0003] The present invention provides a super-long floor slab casting side formwork structure on both sides of a post-casting strip and a supporting method thereof, which solves the technical problems of difficult installation and non-reusability of the side formwork of the post-casting strip.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of the present invention is: to abandon the traditional method of setting steel wire mesh on wooden slats as side formwork, and design the side formwork to be a split-jointed splicing type, that is, on the aluminum bottom formwork, L-shaped aluminum angle pieces are arranged at intervals, and floor slab steel bars are arranged between two adjacent L-shaped aluminum angle pieces, and the gap between the two adjacent L-shaped aluminum angle pieces is sealed with a T-shaped connector above to form a closed side formwork; and to change the traditional side formwork laying process. After the floor slab bottom formwork is spliced, L-shaped aluminum angle pieces are arranged at intervals on the bottom formwork according to the position of the post-cast strip, and then the integral steel mesh in the floor slab is arranged, and finally the gap between the two adjacent L-shaped aluminum angle pieces is sealed with a T-shaped connector to form a closed side formwork; after pouring the concrete on both sides of the post-cast strip, the T-shaped connector is pulled out upwards, and the L-shaped aluminum angle pieces are removed along with the bottom formwork and transported to the upper floor slab for reuse.

[0006] The invention relates to a side formwork structure for pouring an extra-long floor slab on both sides of a post-casting strip, comprising an aluminum floor slab pouring bottom formwork, embedded steel bars in the floor slab, L-shaped aluminum angle pieces and T-shaped aluminum connecting plates. The L-shaped aluminum angle pieces are composed of horizontal plates and vertical plates. Steps are provided on both sides of the vertical plates, and steel bars are embedded in lower grooves on the steps. Connecting slots are provided on the vertical edges of the vertical plates above the steps. Steel bars are embedded in upper grooves on the lower bottom surface of the horizontal plates of the T-shaped aluminum connecting plates, and tongues are provided on both vertical edges of the horizontal plates of the T-shaped aluminum connecting plates. The L-shaped aluminum angle pieces are arranged in a straight line at intervals. The floor slabs are arranged in a straight line and connected to the bottom formwork for casting the floor slab. A post-cast concrete strip is provided between two rows of parallel L-shaped aluminum angles. The embedded steel bars of the floor slabs are provided between two adjacent L-shaped aluminum angles in each row. The embedded steel bars of the floor slabs are supported in the lower grooves in which the steel bars are embedded. A T-shaped connecting aluminum plate is inserted between two adjacent L-shaped aluminum angles. The horizontal plate on the T-shaped connecting aluminum plate is butt-jointed with the steps. The upper ends of the embedded steel bars of the floor slabs are embedded in the upper grooves in which the steel bars are embedded. The T-shaped connecting aluminum plate and the vertical plates on the L-shaped aluminum angles form a closed side formwork.

[0007] The T-shaped connecting aluminum plate is inserted into the connecting slot on the vertical plate through the tongue on it; the horizontal plate is connected to the floor plate casting bottom template through connecting screws.

[0008] A method for supporting a side formwork structure for pouring an extra-long floor slab on both sides of a post-casting strip, characterized by comprising the following steps:

[0009] The first step is to assemble the floor slab casting bottom formwork. According to the designed concrete post-casting strip position, the left and right rows of L-shaped aluminum angles are arranged in a straight line and connected to the floor slab casting bottom formwork to form a concrete post-casting strip. The pre-arranged floor slab embedded steel bars are set between the two adjacent L-shaped aluminum angles in each row.

[0010] Step 2: On the floor slab casting bottom formwork, lay out the overall floor slab embedded steel bars, and embed the floor slab embedded steel bars into the steel bar embedded lower grooves provided on the steps of the L-shaped angle aluminum parts, so that the steps can position and support the floor slab embedded steel bars passing through the concrete post-cast zone;

[0011] Step 3: Insert a T-shaped connecting aluminum plate between two adjacent L-shaped aluminum angle pieces on the left side, so that the horizontal plate on the T-shaped connecting aluminum plate is connected to the step, and the upper end of the embedded steel bar of the floor plate is embedded in the steel bar embedding groove. Each T-shaped connecting aluminum plate and the vertical plate on the L-shaped aluminum angle piece set at intervals form a closed left formwork on the left side of the concrete post-casting zone;

[0012] Step 4: Use the same method as step 3 to complete the splicing of the closed right side formwork on the right side of the concrete post-casting strip;

[0013] Step 5: Pour the floor slab concrete on both sides of the post-cast concrete joint. After the strength of the floor slab concrete on both sides reaches the design requirements, first pull out the T-shaped connecting aluminum plate upwards, and then remove the floor slab casting bottom formwork downwards. The L-shaped angle aluminum parts are removed together with the floor slab casting bottom formwork and transferred to the next casting floor for formwork erection.

[0014] A connecting plate is provided between the T-shaped connecting aluminum plate in the corresponding left template and the T-shaped connecting aluminum plate in the right template.

[0015] The present invention is particularly suitable for high-rise residential buildings that are cast in situ using aluminum formwork. It improves the consistency of the gap position and width of the post-cast strips set on the extra-long floor slabs, the post-cast strips have good visual quality, the side formwork erection process is simple, the project cost is low, and the construction efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 This is a schematic structural diagram of the L-shaped aluminum angle piece 2 of the present invention;

[0018] Figure 3 1 is a schematic structural diagram of the T-shaped aluminum connector plate 10 of the present invention;

[0019] Figure 4 This is a layout diagram of the L-shaped aluminum angle piece 2 of the present invention on the floor slab casting bottom template 1;

[0020] Figure 5 This is a diagram showing the coordination relationship between the L-shaped aluminum angle piece 2 and the pre-embedded steel bars 4 of the floor slab of the present invention;

[0021] Figure 6It is a structural schematic diagram of the present invention in which the T-shaped connecting aluminum plates 10 corresponding to the two sides of the concrete post-casting strip 14 are connected into a whole by the connecting plate 13. Implementation Method

[0022] The present invention is described in detail below with reference to the accompanying drawings:

[0023] A super-long floor slab casting side formwork structure on both sides of a post-cast strip, including an aluminum floor slab casting bottom formwork 1, embedded floor slab steel bars 4, an L-shaped aluminum angle piece 2, and a T-shaped connecting aluminum plate 10. The L-shaped aluminum angle piece 2 is composed of a horizontal plate 5 and a vertical plate 6. Steps 3 are provided on both sides of the vertical plate 6. A steel bar embedded lower groove 8 is provided on the step 3. A connecting slot 9 is provided on the vertical edge of the vertical plate 6 above the step 3. The shape of the L-shaped aluminum angle piece 2 is similar to an angle steel. It is fixed to the floor slab casting bottom formwork on both sides of the post-cast strip through the horizontal plate 5. 1, the shape of the vertical plate 6 is similar to the "convex" shape, and the steps 3 on both sides of the "convex" shape play a role in supporting the embedded steel bars 4 of the floor plate, and also play a role in closing the space below the embedded steel bars 4 of the floor plate. The steel bars set at the top of the steps 3 are embedded in the lower groove 8 to position the embedded steel bars 4 of the floor plate, thereby improving the layout quality of the embedded steel bars in the floor plate at the post-cast zone; on the bottom surface of the horizontal plate of the T-shaped connecting aluminum plate 10, there is a steel bar embedded in the upper groove 12, and on the two vertical sides of the horizontal plate of the T-shaped connecting aluminum plate 10, there are tongues 11; L-shaped angle Aluminum pieces 2 are arranged in a straight line at intervals and connected to the floor slab casting bottom formwork 1. A concrete post-casting strip 14 is provided between two parallel rows of L-shaped aluminum pieces 2. For high-rise buildings, since the positions of the post-casting strips provided on the floor slabs are consistent, the L-shaped aluminum pieces 2 removed along with the floor slab casting bottom formwork 1 can be directly transferred to the next floor casting layer and used directly. The floor slab embedded steel bars 4 are provided between two adjacent L-shaped aluminum pieces 2 in each row. The floor slab embedded steel bars 4 are supported under the embedded steel bars. In the groove 8, a T-shaped connecting aluminum plate 10 is inserted between two adjacent L-shaped angle aluminum parts 2. The horizontal plate on the T-shaped connecting aluminum plate 10 is butted against the step 3. The upper end of the pre-embedded steel bar 4 of the floor slab is embedded in the steel bar embedded upper groove 12. The T-shaped connecting aluminum plate 10 and the vertical plate 6 on the L-shaped angle aluminum part 2 form a closed side formwork. The side formwork solves the problem of the pre-embedded steel bar 4 of the floor slab passing through the side formwork by butting the steel bar embedded lower groove 8 with the steel bar embedded upper groove 12, making the side formwork tightly sealed and eliminating leakage during concrete pouring.

[0024] The T-shaped connecting aluminum plate 10 is inserted into the connecting slot 9 on the vertical plate 6 through the inserting tongue 11 thereon; the horizontal plate 5 is connected to the floor plate casting bottom template 1 through the connecting screws 7.

[0025] A method for supporting a side formwork structure for pouring an extra-long floor slab on both sides of a post-casting strip, characterized by comprising the following steps:

[0026] The first step is to assemble the floor slab casting bottom formwork 1. According to the designed concrete post-casting strip position, the left and right rows of L-shaped aluminum angle pieces 2 are arranged in a straight line at intervals and connected to the floor slab casting bottom formwork 1 to form a concrete post-casting strip 14. The pre-arranged floor slab embedded steel bars 4 are arranged between the two adjacent L-shaped aluminum angle pieces 2 in each row.

[0027] Step 2: On the floor slab casting bottom formwork 1, the entire floor slab embedded steel bars 4 are laid out and embedded into the steel bar embedded lower groove 8 provided on the step 3 of the L-shaped angle aluminum piece 2, so that the step 3 forms a positioning and support for the floor slab embedded steel bars 4 passing through the concrete post-casting strip 14;

[0028] Step 3: Insert a T-shaped connecting aluminum plate 10 between two adjacent L-shaped aluminum angle pieces 2 in the left row, so that the horizontal plate on the T-shaped connecting aluminum plate 10 is connected to the step 3, and the upper end of the embedded steel bars 4 of the floor plate is embedded in the steel bar embedding groove 12. Each T-shaped connecting aluminum plate 10 and the vertical plates 6 on the spaced L-shaped aluminum angle pieces 2 form a closed left formwork 15 on the left side of the concrete post-casting strip 14;

[0029] Step 4: Use the same method as step 3 to complete the splicing of the closed right side formwork 16 on the right side of the concrete post-casting strip 14;

[0030] Step 5: Pour the floor slab concrete on both sides of the concrete post-casting strip 14. After the strength of the floor slab concrete on both sides reaches the design requirements, first pull out the T-shaped connecting aluminum plate 10 upwards, and then remove the floor slab casting bottom formwork 1 downwards. The L-shaped angle aluminum part 2 is removed together with the floor slab casting bottom formwork 1 and transferred to the next casting floor for formwork erection.

[0031] A connecting plate 13 is provided between the T-shaped connecting aluminum plate 10 in the corresponding left template 15 and the T-shaped connecting aluminum plate in the right template 16; through the setting of the connecting plate, the T-shaped connecting aluminum plates 10 on both sides of the post-cast strip can be synchronously inserted and pulled out. At the same time, the connecting plate 13 also plays a role in strengthening the strength of the T-shaped connecting aluminum plate 10 and resisting the external support force of pouring concrete on the floor slabs on both sides of the post-cast strip.

Claims

1. A method for supporting a side formwork structure for casting an extra-long floor slab on both sides of a post-casting strip, comprising an aluminum floor slab casting bottom formwork (1), embedded floor slab steel bars (4), an L-shaped aluminum angle piece (2), and a T-shaped connecting aluminum plate (10), wherein the L-shaped aluminum angle piece (2) is composed of a horizontal plate (5) and a vertical plate (6), steps (3) are provided on both sides of the vertical plate (6), a steel bar embedded lower groove (8) is provided on the step (3), and a connecting slot (9) is provided on the vertical side of the vertical plate (6) above the step (3); a steel bar embedded upper groove (12) is provided on the bottom surface of the horizontal plate of the T-shaped connecting aluminum plate (10), and tongues (11) are provided on both vertical sides of the horizontal plate of the T-shaped connecting aluminum plate (10); the L-shaped aluminum angle piece (2) is spaced apart from the vertical plate (5) and the vertical plate (6) of the T-shaped connecting aluminum plate (10). The floor slab is arranged in a straight line and connected to the floor slab casting bottom template (1). A concrete post-casting strip (14) is provided between two rows of parallel L-shaped aluminum angle pieces (2) arranged in a straight line. The floor slab embedded steel bars (4) are provided between two adjacent L-shaped aluminum angle pieces (2) in each row. The floor slab embedded steel bars (4) are supported in the steel bar embedded lower groove (8). A T-shaped connecting aluminum plate (10) is inserted between the two adjacent L-shaped aluminum angle pieces (2). The horizontal plate on the T-shaped connecting aluminum plate (10) is butt-jointed with the step (3). The upper end of the floor slab embedded steel bars (4) is embedded in the steel bar embedded upper groove (12). The T-shaped connecting aluminum plate (10) and the vertical plate (6) on the L-shaped aluminum angle piece (2) form a closed side template. The method is characterized by the following steps: The first step is to assemble the floor slab casting bottom formwork (1), and according to the designed concrete post-casting strip position, respectively arrange the left and right columns of L-shaped aluminum angle pieces (2) in a straight line at intervals, and connect them to the floor slab casting bottom formwork (1) to form a concrete post-casting strip (14), so that the pre-arranged floor slab embedded steel bars (4) are arranged between the two adjacent L-shaped aluminum angle pieces (2) in each column; Step 2: On the floor slab casting bottom formwork (1), the entire floor slab embedded steel bars (4) are laid out, and the floor slab embedded steel bars (4) are embedded into the steel bar embedded lower groove (8) provided on the step (3) of the L-shaped angle aluminum member (2), so that the step (3) forms a positioning and support for the floor slab embedded steel bars (4) passing through the concrete post-casting strip (14); Step 3: Insert a T-shaped connecting aluminum plate (10) between two adjacent L-shaped aluminum angle pieces (2) on the left side, so that the horizontal plate on the T-shaped connecting aluminum plate (10) is butted against the step (3), so that the upper end of the pre-buried steel bar (4) of the floor plate is embedded in the steel bar embedding groove (12), and each T-shaped connecting aluminum plate (10) and the vertical plate (6) on the L-shaped aluminum angle piece (2) arranged at intervals form a closed left side formwork (15) on the left side of the concrete post-casting strip (14); Step 4: Using the same method as step 3, complete the splicing of the closed right side formwork (16) on the right side of the concrete post-casting strip (14); Step 5: Pour the floor slab concrete on both sides of the post-cast concrete strip (14). After the strength of the floor slab concrete on both sides reaches the design requirements, first pull out the T-shaped connecting aluminum plate (10) upwards, then remove the floor slab casting bottom formwork (1) downwards, and remove the L-shaped angle aluminum piece (2) together with the floor slab casting bottom formwork (1) and transfer it to the next casting floor for formwork erection.

2. The method for supporting the side formwork structure of the super-long floor slab casting on both sides of the post-casting strip according to claim 1 is characterized in that: A connecting plate (13) is provided between the T-shaped connecting aluminum plate (10) in the corresponding left template (15) and the T-shaped connecting aluminum plate in the right template (16).

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