Folding post-cast strip formwork and post-cast strip construction method

Abstract

The present invention relates to the technical field of post-cast strip construction, specifically a foldable post-cast strip formwork and a post-cast strip construction method; the present invention uses side plates to isolate concrete, and the side plates are set as a structure in which the upper formwork and the lower formwork are rotatably connected. Limit blocks are provided on the upper formwork and the lower formwork to avoid and clamp the transverse steel bars, preventing slurry leakage from the position of the transverse steel bars; after the concrete on both sides of the post-cast strip is poured, the upper formwork and the lower formwork can be folded and taken out from the gap between the transverse steel bars, and can be reused, avoiding material waste; the present invention adds a support component between the side plates on both sides to resist the pressure of the concrete on both sides of the post-cast strip on the side plates, making the side plates not easy to move or deform and not leaking slurry, and can ensure the forming quality of the wall; by means of the pressing wooden square, pressure is provided for the limit blocks clamped on the upper formwork. At the same time, when pouring the concrete on both sides of the post-cast strip, the concrete is prevented from entering the post-cast strip position from above the side plates.

Description

Technical Field

[0001] The present invention relates to the technical field of post-cast strip construction, and specifically to a folding post-cast strip formwork and a post-cast strip construction method. Background Art

[0002] To prevent harmful cracks that may be caused by uneven self-shrinkage or settlement of reinforced concrete structures, according to design or construction specification requirements, post-cast concrete strips are usually reserved at corresponding positions of the foundation slab, wall, and beam. After the floor slab formwork is erected, the post-cast strip formwork is erected at the position of the post-cast strip. After the floor slabs on both sides of the post-cast strip are poured, the post-cast strip position is then poured.

[0003] In traditional construction methods, the post-cast strip formwork mainly uses wire mesh or plates to isolate concrete; when using wire mesh to isolate concrete, it is convenient for the floor slab steel bars to pass through the wire mesh for binding. When pouring the floor slabs on both sides of the post-cast strip, the wire mesh can withstand a large concrete pressure, avoiding deformation or displacement of the post-cast strip formwork. However, the phenomenon of mortar leakage through the wire mesh is relatively serious during the pouring process, and the post-cast strip concrete still needs to be chiseled after the floor slabs on both sides are poured; when using plates to isolate concrete, usually steel bar grooves are opened on the upper and lower sides of the plates. After the upper and lower steel bars are bound and the floor slabs on both sides of the post-cast strip are poured and solidified, it is very difficult to completely remove the plates and they cannot be reused. Moreover, the two side plates are only fixed to the post-cast strip bottom slab by bolts, and there is a lack of a support structure between the two side plates. When pouring the floor slab concrete on both sides of the post-cast strip, the plates are prone to deformation or displacement under stress, affecting the wall forming quality. Summary of the Invention

[0004] The technical problem to be solved by the present invention is the problem of increased construction costs caused by mortar leakage when using wire mesh to isolate concrete and the inability to reuse the plates when using plates to isolate concrete during the above-mentioned post-cast strip construction process.

[0005] To solve the above problems, the present invention provides a method and device for strengthening the floor post-cast strip formwork, and its specific solution is as follows:

[0006] Technical solution 1 of the present invention discloses a folding post-cast strip formwork, which includes two side plates arranged at the position of the post-cast strip on the floor formwork. The bottom of the side plates abuts against the bottom plate of the floor formwork. Upper horizontal steel bars and lower horizontal steel bars are tied on the floor formwork. The side plates include an upper template and a lower template lapped at the bottom of the upper template. The lapping position of the upper template and the lower template is rotationally connected. A number of limiting blocks are respectively movably clamped at the top of the upper template and the bottom of the lower template. Two adjacent limiting blocks of the upper template and two adjacent limiting blocks of the lower template are respectively used to clamp the upper horizontal steel bars and the lower horizontal steel bars. A pressing ceiling wooden square is installed at the top end of the limiting block at the top of the upper template. The top surface height of the pressing ceiling wooden square is higher than the height of the floor grouting. The bottom end of the limiting block at the bottom of the lower template abuts against the floor formwork; at least one support component with an adjustable horizontal length is arranged between the two side plates.

[0007] As a preference, a further technical solution of the present invention is:

[0008] A plurality of horizontal back ribs are fixed along the length direction on the inner sides of the upper template and the lower template. The lowermost horizontal back rib on the upper template and the uppermost horizontal back rib on the lower template are connected by a hinge, so that the lapping position of the upper template and the lower template is rotationally connected; the left and right ends of the support component abut against the inner sides of the horizontal back ribs. The horizontal back ribs are used to increase the horizontal support of the upper template and the lower template. The upper template and the lower template are rotationally connected by a hinge, which is convenient for folding the upper template and the lower template, so as to take out the side plates from the position of the post-cast strip and reuse them.

[0009] The support component includes a scissor jack. Vertical back ribs are fixed on both the base and the support seat of the scissor jack. The outer sides of the vertical back ribs on both sides abut against the inner sides of the horizontal back ribs on both sides. The two side plates are supported by the scissor jack, and the supporting force is transmitted to the horizontal back ribs through the vertical back ribs, and then transmitted to the upper template and the lower template. When pouring the floor concrete on both sides of the post-cast strip, it can be avoided that the side plates move towards the middle or deform under the concrete pressure.

[0010] The limiting block is of a concave structure, and the socket of the concave structure is clamped at the top of the upper template or the bottom of the lower template.

[0011] The gap between the limiting block and the upper horizontal steel bar or the lower horizontal steel bar is sealed by a sealing member.

[0012] Technical solution 2 of the present invention discloses a construction method for the post-cast strip, which includes the following steps:

[0013] Step 1: Install the floor formwork, tie the lower horizontal steel bars and the lower vertical steel bars of the floor. The tying direction of the lower horizontal steel bars is perpendicular to the length direction of the post-cast strip;

[0014] Step 2: Pre-manufacture two side plates, rotatably connect the upper template and the lower template of the side plates, snap a number of limiting blocks on the top of the upper template and the bottom of the lower template respectively, adjust the positions of the limiting blocks on the lower template according to the spacing of each lower horizontal steel bar, so that two adjacent limiting blocks on the lower template clamp each lower horizontal steel bar, and the bottoms of the limiting blocks on the two lower templates respectively abut against the post-cast strip positions on the floor slab template;

[0015] Step 3: Bind the upper horizontal steel bars of the floor slab on the floor slab template, and bind the upper vertical steel bars except for the post-cast strip positions. When the upper horizontal steel bars are bound to the post-cast strip positions, adjust the positions of the limiting blocks on the upper template according to the spacing of each upper horizontal steel bar, so that two adjacent limiting blocks on the upper template clamp each upper horizontal steel bar;

[0016] Step 4: Use a plugging member to plug the gap between the limiting block and the horizontal steel bar;

[0017] Step 5: Place at least one support component between the two side plates, and adjust the horizontal length of the support component so that the left and right ends of the support component abut against the inner walls of the two side plates;

[0018] Step 6: Pour the floor slab concrete on both sides of the post-cast strip position;

[0019] Step 7: After the floor slab concrete solidifies, remove the support component, then fold the upper template and the lower template, and take them out through the gap of the upper horizontal steel bar;

[0020] Step 8: Bind the upper vertical steel bars at the post-cast strip position, then pour the concrete at the post-cast strip position. After the post-cast strip concrete solidifies, the construction is completed.

[0021] After performing Step 3, install a coping wooden square on the top of the limiting block snapped on the top of the upper template, so that the top surface height of the coping wooden square is higher than the grouting height of the floor slab on both sides of the post-cast strip. The coping wooden square provides pressure for the limiting block snapped on the upper template. At the same time, it prevents the concrete from entering the post-cast strip position from above the side plate when pouring the concrete on both sides of the post-cast strip.

[0022] The present invention adopting the above technical solution, compared with the prior art, has the following beneficial effects:

[0023] The present invention uses side plates to isolate concrete, and the side plates are set as a structure in which the upper template and the lower template are rotatably connected. Limit blocks are provided on the upper template and the lower template to avoid and clamp the horizontal steel bars, preventing mortar leakage from the position of the horizontal steel bars; after the concrete on both sides of the post-cast strip is poured, the upper template and the lower template are folded and taken out from the gap of the horizontal steel bars, and can be reused, avoiding material waste; the present invention adds a support component between the side plates on both sides to resist the pressure of the concrete on both sides of the post-cast strip on the side plates, making the side plates not easy to move or deform, without mortar leakage, and ensuring the forming quality of the wall; by means of the top pressing wooden square, pressure is provided for the limit blocks clamped on the upper template. At the same time, when pouring the concrete on both sides of the post-cast strip, the concrete is prevented from entering the position of the post-cast strip from above the side plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the front view of the folding post-cast strip template in the first embodiment of the present invention;

[0025] Figure 2 is the schematic diagram of removing the folding post-cast strip template in the second embodiment of the present invention;

[0026] Figure 3 is the side view of the first method for the limit block to clamp the horizontal steel bar in the present invention;

[0027] Figure 4 is the side view of the second method for the limit block to clamp the horizontal steel bar in the present invention;

[0028] In the figure: 1, top pressing wooden square; 2, limit block; 3, upper template; 4, upper horizontal steel bar; 5, hinge; 6, lower horizontal steel bar; 7, lower template; 8, horizontal back brace; 9, vertical back brace; 10, support component; 11, plugging piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present invention will be further described below in conjunction with embodiments, and the purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0030] See attached Figures 1-4, Embodiment 1 of the present invention discloses a folding post-cast strip template, which includes two side plates arranged at the post-cast strip position on the floor slab template. The bottom of the side plate abuts against the bottom plate of the floor slab template. Upper horizontal steel bars 4 and lower horizontal steel bars 6 are tied on the floor slab template. It is characterized in that: the side plate includes an upper template 3 and a lower template 7 lapped at the bottom of the upper template 3. The lapping position of the upper template 3 and the lower template 7 is rotationally connected. A number of limiting blocks 2 are respectively movably clamped at the top of the upper template 3 and the bottom of the lower template 7. Two adjacent limiting blocks 2 of the upper template 3 and two adjacent limiting blocks 2 of the lower template 7 are respectively used to clamp the upper horizontal steel bar 4 and the lower horizontal steel bar 6. At the top end of the limiting block 2 at the top of the upper template 3, a pressing roof joist 1 is installed. The top surface height of the pressing roof joist 1 is higher than the floor grouting height. The bottom end of the limiting block 2 at the bottom of the lower template 7 abuts against the floor slab template; at least one support component 10 with an adjustable horizontal length is arranged between the two side plates.

[0031] Preferably, there are two ways for the limiting block 2 to clamp the horizontal steel bar. The first clamping method is: the length of the limiting block 2 is set to be equal to the spacing between adjacent horizontal steel bars. A distance equal to the diameter of the horizontal steel bar is reserved between two adjacent limiting blocks 2. Two adjacent limiting blocks 2 clamp one horizontal steel bar; the second clamping method is: two limiting blocks 2 are a group, clamping one horizontal steel bar. The gap between two adjacent groups is blocked by a cushion block or gravel. This setting can better adjust the position of the limiting block 2 according to the horizontal steel bar spacing of different buildings. Compared with the first clamping method, it has stronger versatility.

[0032] In this embodiment, the upper template 3 and the lower template 7 are made of wooden templates or metal templates on the construction site. The upper template 3 and the lower template 7 both adopt a multi-segment splicing method. Each segment of the upper template 3 and each segment of the lower template 7 are connected and fixed. The length of each segment of the upper template 3 and the lower template 7 is based on the gap where the horizontal steel bar can be drawn out after folding; a plurality of horizontal back ribs 8 are fixed along the length direction on the inner sides of the upper template 3 and the lower template 7. The bottom surface of the lowermost horizontal back rib 8 on the upper template 3 abuts against the top surface of the uppermost horizontal back rib 8 on the lower template 7. A hinge 5 is arranged on the inner side wall at the abutting position. Specifically, the two sides of the hinge 5 are respectively fixed on the inner side wall of the lowermost horizontal back rib 8 on the upper template 3 and the inner side wall of the uppermost horizontal back rib 8 on the lower template 7. Through the hinge 5, the lapping position of the upper template 3 and the lower template 7 is rotationally connected. The angle between the upper template 3 and the lower template 7 can be adjusted from 0 degrees to 180 degrees, which is convenient for folding the upper template 3 and the lower template 7; the left and right ends of the support component 10 abut against the inner side of the horizontal back rib 8. By the horizontal back rib 8, the horizontal support of the upper template 3 and the lower template 7 is increased. By the hinge 5, the upper template 3 and the lower template 7 are rotationally connected, which is convenient for folding the upper template 3 and the lower template 7, so as to take out the side plate from the post-cast strip position and reuse it.

[0033] In this embodiment, the support assembly 10 includes a scissor jack. Vertical back ribs 9 are fixed to both the base and the support seat of the scissor jack. By rotating the screw rod of the scissor jack, the distance between the base and the support seat of the scissor jack is adjusted. When this distance is increased, the outer sides of the vertical back ribs 9 on both sides are abutted against the inner sides of the horizontal back ribs 8 on both sides. The two side plates are supported by the scissor jack, and the supporting force is transmitted to the horizontal back ribs 8 through the vertical back ribs 9, and then transmitted to the upper template 3 and the lower template 7. When pouring the floor concrete on both sides of the post-cast strip, it is possible to prevent the side plates from moving towards the middle or deforming due to the concrete pressure.

[0034] In this embodiment, the limiting block 2 has a concave structure, and the socket of the concave structure is clamped on the top of the upper template 3 or the bottom of the lower template 7.

[0035] In this embodiment, the length of the pressed wooden square 1 and the upper template 3 spliced in multiple segments is the same as the length of the upper template 3. Preferably, in order to increase the stability of the pressed wooden square 1, the pressed wooden square 1 and the upper template 3 are fixed with bolts, and the fixed connection can be released by removing the bolts subsequently. The pressed wooden square 1 provides pressure for the limiting block 2 clamped on the upper template 3. At the same time, when pouring the concrete on both sides of the post-cast strip, it is possible to prevent the concrete from entering the post-cast strip position from above the side plates.

[0036] In this embodiment, the gaps between the limiting block 2 and the upper horizontal steel bars 4 or the lower horizontal steel bars 6 are blocked by the blocking members 11. The blocking members 11 are made of surplus cushion blocks, stones or other items that can block the gaps on the construction site.

[0037] Embodiment II of the present invention discloses a post-cast strip construction method, which includes the following steps:

[0038] Step 1: Install the floor template, bind the lower horizontal steel bars 6 and the lower vertical steel bars of the floor. The binding direction of the lower horizontal steel bars 6 is perpendicular to the length direction of the post-cast strip;

[0039] Step 2: Pre-manufacture two side plates, rotatably connect the upper template 3 and the lower template 7 of the side plates, respectively clamp a number of limiting blocks 2 on the top of the upper template 3 and the bottom of the lower template 7, adjust the positions of the limiting blocks 2 at the bottom of the lower template 7 according to the spacing of each lower horizontal steel bar 6, so that two adjacent limiting blocks 2 at the bottom of the lower template 7 clamp each lower horizontal steel bar 6, press down the side plates, and make the limiting blocks 2 at the bottom of the two lower templates 7 abut against the post-cast strip position on the floor template;

[0040] Step 3. Tie the upper horizontal steel bars 4 of the floor slab on the floor slab formwork, and tie the upper vertical steel bars except at the post-cast strip position. When the upper horizontal steel bars 4 are tied to the post-cast strip position, adjust the positions of the limiting blocks 2 on the upper formwork 3 according to the spacing of each upper horizontal steel bar 4, so that two adjacent limiting blocks 2 on the upper formwork 3 clamp each upper horizontal steel bar 4;

[0041] Step 4. Install a coping wooden square 1 on the top of the limiting block 2 clamped on the top of the upper formwork 3, so that the top surface height of the coping wooden square 1 is higher than the floor slab grouting height on both sides of the post-cast strip;

[0042] Step 5. Use a sealing member 11 to seal the gap between the limiting block 2 and the horizontal steel bar;

[0043] Step 6. Place at least one support component 10 between the two side plates, and adjust the horizontal length of the support component 10 so that the left and right ends of the support component 10 abut against the inner walls of the two side plates;

[0044] Step 7. Pour the floor slab concrete on both sides of the post-cast strip position;

[0045] Step 8. After the floor slab concrete solidifies, remove the support component 10, then fold the upper formwork 3 and the lower formwork 7, and take them out through the gap of the upper horizontal steel bar 4;

[0046] Step 9. Tie the upper vertical steel bars at the post-cast strip position, then pour the concrete at the post-cast strip position. After the post-cast strip concrete solidifies, the construction is completed.

[0047] The present invention uses side plates to isolate concrete, and sets the side plates as a structure in which the upper formwork 3 and the lower formwork 7 are rotationally connected. Limiting blocks 2 are provided on the upper formwork 3 and the lower formwork 7 to avoid and clamp the horizontal steel bars, preventing slurry leakage from the position of the horizontal steel bars; when the concrete on both sides of the post-cast strip is poured, the upper formwork 3 and the lower formwork 7 can be folded and taken out from the gap of the horizontal steel bars, and can be reused, avoiding material waste; the present invention adds a support component 10 between the two side plates to resist the pressure of the concrete on both sides of the post-cast strip on the side plates, making the side plates not easy to move or deform, and not leaking slurry, and ensuring the wall forming quality; the coping wooden square 1 provides pressure for the limiting block 2 clamped on the upper formwork 3. At the same time, when pouring the concrete on both sides of the post-cast strip, it prevents the concrete from entering the post-cast strip position from above the side plates.

[0048] The above are only the preferred and feasible embodiments of the present invention, and do not limit the scope of the rights of the present invention. All equivalent changes made by using the content of the specification and drawings of the present invention are included in the scope of the rights of the present invention.

Claims

1. A foldable post-cast strip formwork, comprising two side panels arranged at the post-cast strip position on the floor slab formwork, the bottom of the side panels abutting against the bottom plate of the floor slab formwork, and upper transverse steel bars (4) and lower transverse steel bars (6) being tied to the floor slab formwork, characterized in that: The side panels include an upper template (3) and a lower template (7) overlapped at the bottom of the upper template (3); the overlapped position of the upper template (3) and the lower template (7) is rotatably connected; the top of the upper template (3) and the bottom of the lower template (7) are respectively movably connected with a plurality of limit blocks (2); two adjacent limit blocks (2) of the upper template (3) and two adjacent limit blocks (2) of the lower template (7) are respectively used to clamp the upper transverse steel bars (4) and the lower transverse steel bars (6); a top pressure wood square (1) is installed at the top of the top limit block (2) of the upper template (3); the top surface height of the top pressure wood square (1) is higher than the grouting height of the floor slab; the bottom end of the bottom limit block (2) of the lower template (7) is abutted against the floor slab template; at least one support assembly (10) with adjustable horizontal length is provided between the two side panels.

2. The foldable post-casting strip formwork according to claim 1, characterized in that: A plurality of horizontal back ribs (8) are fixed to the inner sides of the upper template (3) and the lower template (7) along the length direction. The horizontal back rib (8) at the lower end of the upper template (3) and the horizontal back rib (8) at the upper end of the lower template (7) are connected via hinges (5), so that the overlapping position of the upper template (3) and the lower template (7) is rotatably connected; the left and right ends of the support assembly (10) are in contact with the inner sides of the horizontal back ribs (8).

3. The foldable post-casting strip formwork according to claim 2, characterized in that: The support assembly (10) includes a scissor jack, and vertical back ribs (9) are fixed on the base and the support seat of the scissor jack, and the outer sides of the vertical back ribs (9) on both sides abut against the inner sides of the horizontal back ribs (8) on both sides.

4. The foldable post-casting strip formwork according to claim 1, characterized in that: The limit block (2) is a concave-shaped structure, and the socket of the concave-shaped structure is clamped on the top of the upper template (3) or the bottom of the lower template (7).

5. The foldable post-casting strip formwork according to claim 1 is characterized in that: The gap between the limiting block (2) and the upper transverse steel bar (4) or the lower transverse steel bar (6) is blocked by a blocking piece (11).

6. A post-casting strip construction method, characterized in that: The following steps are involved: Step 1: Install the floor slab formwork and tie the lower transverse reinforcement (6) of the floor slab, wherein the tying direction of the lower transverse reinforcement (6) is perpendicular to the length direction of the post-casting strip; Step 2: prefabricate two side panels, rotate and connect the upper template (3) and the lower template (7) of the side panels, clamp a plurality of limit blocks (2) at the top of the upper template (3) and the bottom of the lower template (7), adjust the position of each limit block (2) at the bottom of the lower template (7) according to the spacing of each lower transverse steel bar (6), so that two adjacent limit blocks (2) of the lower template (7) are clamped on each lower transverse steel bar (6), and press the side panels downward so that each limit block (2) at the bottom of the two lower templates (7) abuts against the position of the post-casting strip on the floor template; Step 3: Tie the upper transverse reinforcement (4) of the floor slab on the floor slab formwork. When the upper transverse reinforcement (4) is tied to the position of the post-casting strip, adjust the position of each limit block (2) on the upper template (3) according to the spacing of each upper transverse reinforcement (4), so that two adjacent limit blocks (2) on the upper template (3) clamp each upper transverse reinforcement (4); Step 4: Install the top wood (1) on the top of the limit block (2) clamped on the top of the upper template (3), so that the top surface height of the top wood (1) is higher than the grouting height of the floor slab on both sides of the post-casting strip; Step 5: placing at least one support assembly (10) between the two side panels, and adjusting the horizontal length of the support assembly (10) so that the left and right ends of the support assembly (10) abut against the inner walls of the side panels on both sides; Step 6: pour the floor slab concrete on both sides of the post-casting zone; Step 7: After the floor slab concrete solidifies, the support assembly (10) is removed, and then the upper formwork (3) and the lower formwork (7) are folded and taken out through the gap between the upper transverse reinforcements (4); Step 8. Tie up the upper vertical reinforcement at the post-casting joint, then pour the concrete at the post-casting joint. After the concrete in the post-casting joint solidifies, the construction is completed.

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