Post-cast strip formwork and construction method for casting post-cast strip

Abstract

The present invention provides a post-cast strip template, comprising: a support plate, two support plates are arranged opposite to each other to form an installation cavity, the support plate has a groove opening upward, the groove is connected with the installation cavity; a water-stop steel plate, the water-stop steel plate is horizontally penetrated into the installation cavity through the groove and abuts against the support plate, the water-stop steel plate divides the installation cavity into upper and lower casting positions; a support rod, a plurality of the support rods are arranged at intervals and are telescopically penetrated through the water-stop steel plate, so that the upper part of the support rod is located at the casting position of the upper layer, and the lower part of the support rod is located at the casting position of the lower layer. The present invention eliminates the problems of concrete leakage, loose reinforcement of the template, and unclean removal.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a post-cast strip template. Background Art

[0002] Post-cast strips are concrete strips set at the corresponding positions of foundation slabs, walls, and beams in accordance with design or construction specifications to prevent harmful cracks that may occur in cast-in-place reinforced concrete structures due to uneven shrinkage or settlement. Post-cast strips temporarily divide the structure into several parts. After the internal shrinkage of the components, the construction joint concrete is poured again after a certain period of time to connect the structure into a whole. The pouring time of post-cast strips should be selected when the temperature is relatively low. Cement or concrete with a trace amount of aluminum powder added to cement can be poured. Its strength grade should be one level higher than the strength of the component to prevent cracks from appearing between the new and old concretes and form weak points.

[0003] Since the post-casting strip is left for a long time and needs to be chiseled before pouring, there is a lot of sediment and water in the post-casting strip. Although some of it can be cleaned out manually, there is still a small amount of sediment in the post-casting strip, which makes the upper surface of the formwork unable to be on the same horizontal plane, making the formwork reinforcement weak, thus affecting the pouring quality of the post-casting strip. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a post-cast strip template and a construction method for casting the post-cast strip, which solves the problem in the prior art that the template reinforcement is not firm, thereby affecting the casting quality of the post-cast strip.

[0005] The present invention provides a post-casting strip template, which comprises:

[0006] A support plate, wherein two support plates are arranged opposite to each other to form a mounting cavity, and each support plate has a groove opening upward, and the groove is connected to the mounting cavity;

[0007] A water-stop steel plate, which is transversely inserted into the installation cavity through the groove and abuts against the support plate, and the water-stop steel plate divides the installation cavity into two layers of casting positions, an upper layer and a lower layer;

[0008] A plurality of support rods are arranged at intervals and are telescopically penetrated through the water-stop steel plate, so that the upper portion of the support rod is located at the casting position of the upper layer, and the lower portion of the support rod is located at the casting position of the lower layer.

[0009] On the other hand, the present invention also provides a construction method for casting a post-cast strip using a post-cast strip template, comprising the following steps:

[0010] S1. Set up a 500mm×500mm water collection pit next to the post-casting strip;

[0011] S2. Connect the post-casting strip and the sump through a 200mm diameter PVC casing;

[0012] S3. Rinse the post-casting belt with a high-pressure water gun to allow the mud to flow into the sump through the PVC casing;

[0013] S4. Prefabricate the post-casting strip template and hoist the post-casting strip template into place;

[0014] S5. Pouring of foundation slab;

[0015] S6. Pouring of post-casting concrete;

[0016] S7. Seal the joints with grouting.

[0017] The technical principle of the present invention is: when in use, first position and lay out the lines at the post-casting strip, adjust the telescopic amount of the support rods so that the ends of multiple support rods are on the same horizontal plane, then pour concrete at the pouring positions of the upper and lower layers in turn, and finally grouting and sealing the joints to complete the pouring of the post-casting strip.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the support rods are set to be retractable, which not only can adjust their own length according to different terrain to make the upper surface of the formwork on the same horizontal plane, but also multiple support rods can improve the firmness of the formwork, thereby ensuring the casting quality of the post-cast strip; in addition, the water-stop steel plate can reduce the risk of leakage; the formwork is directly placed in the post-cast strip before pouring, and there is no need to disassemble it later, which eliminates the problems of concrete leakage, loose formwork reinforcement, and unclean dismantling.

[0019] Preferably, a first cross bar and a second cross bar are provided at the casting position of the lower layer, and a plurality of first cross bars and a plurality of second cross bars are crosswise arranged, and the two ends of the first cross bar are respectively fixedly connected to the corresponding support plates, and the support bar is rotatably arranged on the first cross bar, and the end of the second cross bar is flush with the support plate.

[0020] Preferably, the first cross bar is fixedly provided with mounting sleeves having the same number as the supporting rods, and one end of the supporting rod extends into the mounting sleeve and is threadably engaged with the mounting sleeve.

[0021] Preferably, a first limit block and a second limit block arranged opposite to each other are fixedly provided on the inner wall of the groove, and when the waterstop steel plate is located in the installation cavity, the upper surface and the lower surface of the waterstop steel plate respectively abut against the corresponding first limit block and the second limit block.

[0022] Preferably, a third cross bar and a fourth cross bar are further included, the two support plates are connected by the third cross bar, and the fourth cross bar is located in the casting position of the upper layer and is movably connected to the support bar.

[0023] Preferably, the waterstop steel plate has a pouring port, and the pouring port connects two layers of pouring positions.

[0024] Preferably, there is at least one detachable baffle plate between the two support plates, and the baffle plate is arranged perpendicular to the water-stop steel plate.

[0025] Preferably, the support plate has a slot, the baffle plate has a tooth, and the tooth is locked in the slot so that the baffle plate blocks the installation cavity.

[0026] Preferably, the bottom of the sump is lower than the bottom of the post-cast strip, the height difference is not less than 300 mm, and the bottom of the post-cast strip is set with a slope of 3%-5%. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The three-dimensional post-casting strip template of the present invention Figure 1 ;

[0028] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0029] Figure 3 The three-dimensional post-casting strip template of the present invention Figure 2 ;

[0030] Figure 4 It is the structural schematic diagram of the post-casting belt;

[0031] Figure 5 for Figure 4 Sectional view along BB;

[0032] In the figure: 1. support plate; 2. installation cavity; 3. groove; 4. water-stop steel plate; 5. casting position; 6. support rod; 7. first cross bar; 8. second cross bar; 9. installation sleeve; 10. first limit block; 11. second limit block; 12. third cross bar; 13. fourth cross bar; 14. casting mouth; 15. baffle; 16. slot; 17. tooth; 18. PVC sleeve; 19. post-casting strip; 20. sump. DETAILED DESCRIPTION

[0033] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", etc. 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The following will be combined with the attached Figure 1-5, the present invention is further described.

[0035] like Figure 1-3 , post-casting strip formwork, including:

[0036] A support plate 1, wherein two support plates 1 are arranged opposite to each other to form a mounting cavity 2, and a groove 3 opening upward is provided on the support plate 1, and the groove 3 is connected to the mounting cavity 2;

[0037] The water-stop steel plate 4 is transversely penetrated into the installation cavity 2 through the groove 3 and abuts against the support plate 1. The water-stop steel plate 4 divides the installation cavity 2 into two layers of casting positions 5, upper and lower;

[0038] The support rods 6 are arranged at intervals and are telescopically penetrated through the water-stop steel plate 4 so that the upper part of the support rods 6 is located at the casting position 5 of the upper layer and the lower part of the support rods 6 is located at the casting position 5 of the lower layer.

[0039] When in use, firstly, position and lay out the post-cast strip, adjust the telescopic amount of the support rod 6, so that the upper ends of the multiple support rods 6 are on the same horizontal plane, then pour concrete in the pouring positions 5 of the upper and lower layers in turn, and finally grout the joints to seal and complete the pouring of the post-cast strip. The support rod 6 is set to be telescopic, which can not only adjust its own length according to the different terrain to make the upper surface of the template on the same horizontal plane, avoiding the uneven casting surface caused by the unevenness of the template, but also the multiple support rods 6 can improve the firmness of the template, thereby ensuring the casting quality of the post-cast strip; in addition, the water-stop steel plate 4 can reduce the risk of leakage; the template is directly placed in the post-cast strip before pouring, and does not need to be disassembled in the later stage, which eliminates the problems of concrete leakage, loose reinforcement of the template, and unclean removal.

[0040] The pouring position 5 at the lower layer is provided with a first crossbar 7 and a second crossbar 8. A plurality of first crossbars 7 and a plurality of second crossbars 8 are cross-arranged to form a mesh structure to improve the stability of the formwork. The two ends of the first crossbar 7 are respectively fixedly connected to the corresponding support plate 1. The support rod 6 is rotatably arranged on the first crossbar 7, and the end of the second crossbar 8 is flush with the support plate 1. The gap between the first crossbar 7 and the second crossbar 8 can accommodate a small amount of sediment to prevent the sediment from being placed below and affecting the later pouring. At the same time, the cross distribution can improve the stability of the formwork, thereby improving the pouring quality of the post-casting zone.

[0041] The first cross bar 7 is fixed with mounting sleeves 9 of the same number as the supporting rods 6, and one end of the supporting rod 6 extends into the mounting sleeve 9 and is threadedly engaged with the supporting rod 6. By screwing the supporting rod 6 in and out, the extension length of the supporting rod 6 is changed, so that the surface of the template is on the same horizontal plane, so that the surface of the cast post-casting strip is flat.

[0042] The inner wall of the groove 3 is fixed with a first stopper 10 and a second stopper 11 arranged opposite to each other. When the water-stop steel plate 4 is located in the installation cavity 2, the upper surface and the lower surface of the water-stop steel plate 4 are respectively against the corresponding first stopper 10 and the second stopper 11. The first stopper 10 and the second stopper 11 tightly clamp the water-stop steel plate 4 therebetween to prevent the water-stop steel plate 4 from sliding up and down in the groove 3 and affecting the firmness of the template; in addition, fixing the water-stop steel plate 4 can avoid the risk of leakage.

[0043] The third crossbar 12 and the fourth crossbar 13 are also included. The two support plates 1 are connected by the third crossbar 12. The fourth crossbar 13 is located in the casting position 5 of the upper layer and is movably connected to the support rod 6. After the rear support rod 6 is adjusted, the support rod 6 is inserted into the fourth crossbar 13. Figure 3 As shown, the end of the fourth cross bar 13 is inserted into the third cross bar 12. In other embodiments, the fourth cross bar 13 can also be installed between two third cross bars 12. The fourth cross bar 13 can further limit the horizontality of the upper surface of the formwork to avoid the problem of highly uneven slope in the cast post-cast zone.

[0044] The water stop steel plate 4 is provided with a pouring port 14, which connects the two pouring positions 5. This prevents the pouring position 5 at the lower layer from being completely filled with concrete due to the obstruction of the water stop steel plate 4.

[0045] A detachable baffle plate 15 is provided between the two support plates 1, and the baffle plate 15 is arranged perpendicular to the water-stop steel plate 4. During the pouring process, since the concrete is not shaped, the baffle plate 15 can shape the concrete to prevent the concrete from leaking.

[0046] The support plate 1 has a slot 16, and the baffle plate 15 has a tooth 17, which is locked in the slot 16 so that the baffle plate 15 blocks the installation cavity 2. During the pouring process, the tooth 17 is locked in the slot 16, so that the baffle plate 15 can position the concrete; after pouring for a certain period of time, the baffle plate 15 is removed, and the tooth 17 is partially filled with concrete and smoothed, so that the surface of the poured post-casting strip is relatively flat.

[0047] like Figure 4-5 As shown, the construction method of pouring the post-casting strip using the post-casting strip template includes the following steps:

[0048] S1. Set up a 500mm×500mm sump 20 next to the post-casting strip 19;

[0049] S2. Connect the post-casting strip 19 and the sump 20 through a 200 mm diameter PVC sleeve 18;

[0050] S3. The post-casting belt is flushed with a high-pressure water gun so that the mud flows into the sump 20 through the PVC sleeve 18, which can thoroughly clean the mud and accumulated water in the post-casting belt, effectively ensure the casting quality of the post-casting belt 19, and reduce the risk of leakage;

[0051] S4 prefabricated post-casting strip template, and the post-casting strip template hoisting in place, according to the actual situation to add post-casting strip template, multiple post-casting strip template by water stop steel plate 4 overlap after completion of the splicing operation;

[0052] S5. Pouring of foundation slab;

[0053] S6. Concrete pouring of post-cast zone 19;

[0054] S7. Seal the joints with grouting.

[0055] The bottom of the sump 20 is lower than the bottom of the post-casting belt, and the height difference is not less than 300 mm. The bottom of the post-casting belt 19 is set with a slope of 3%-5%. It is convenient for the mud and accumulated water in the post-casting belt 19 to be input into the sump 20.

[0056] The post-cast strip cast by the formwork in this embodiment is more solid and does not need to be dismantled, thus eliminating the problems of concrete leakage, difficulty in reinforcing the formwork, and difficulty or incomplete dismantling; in addition, the problem of sediment in the post-cast strip is solved, effectively ensuring the casting quality of the post-cast strip.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. Post-casting strip formwork, characterized in that: include: A support plate (1), wherein two support plates (1) are arranged opposite to each other on the left and right to form a mounting cavity (2), and the support plate (1) is provided with a groove (3) opening upward, and the groove (3) is connected to the mounting cavity (2); a water-stop steel plate (4), the water-stop steel plate (4) being transversely inserted into the installation cavity (2) through the groove (3) and abutting against the support plate (1), the water-stop steel plate (4) dividing the installation cavity (2) into upper and lower casting positions (5); Support rods (6), a plurality of the support rods (6) are arranged at intervals and are telescopically penetrated through the water-stop steel plate (4), so that the upper portion of the support rods (6) is located at the casting position (5) of the upper layer, and the lower portion of the support rods (6) is located at the casting position (5) of the lower layer; A first cross bar (7) and a second cross bar (8) are provided on the pouring position (5) of the lower layer, and a plurality of first cross bars (7) and a plurality of second cross bars (8) are cross-arranged, and the two ends of the first cross bar (7) are respectively fixedly connected to the corresponding support plate (1), and the support bar (6) is rotatably arranged on the first cross bar (7), and the end of the second cross bar (8) is flush with the support plate (1); The first cross bar (7) is fixedly provided with mounting sleeves (9) in the same number as the supporting rods (6), and one end of the supporting rod (6) extends into the mounting sleeve (9) and is threadably engaged with the mounting sleeve (9); A first limit block (10) and a second limit block (11) are fixedly provided on the inner wall of the groove (3) and are arranged opposite to each other up and down. When the water stop steel plate (4) is located in the installation cavity (2), the upper surface and the lower surface of the water stop steel plate (4) respectively abut against the corresponding first limit block (10) and the second limit block (11).

2. The post-casting strip formwork according to claim 1 is characterized in that: It also includes a third cross bar (12) and a fourth cross bar (13), wherein the two support plates (1) are connected via the third cross bar (12), and the fourth cross bar (13) is located in the casting position (5) of the upper layer and is movably connected to the support bar (6).

3. The post-casting strip formwork according to claim 1 is characterized in that: The water stop steel plate (4) is provided with a pouring port (14), and the pouring port (14) enables two layers of pouring positions (5) to be connected.

4. The post-casting strip formwork according to claim 1, characterized in that: At least one detachable baffle plate (15) is provided between the two support plates (1), and the baffle plate (15) is arranged perpendicular to the water-stop steel plate (4).

5. The post-casting strip formwork according to claim 4, characterized in that: The support plate (1) has a slot (16), the baffle plate (15) has a latching tooth (17), and the latching tooth (17) is latched in the slot (16) so that the baffle plate (15) blocks the installation cavity (2).

6. A construction method for casting a post-cast strip using the post-cast strip template according to any one of claims 1 to 5, characterized in that: The following steps are included: S1. Set up a 500mm x 500mm sump (20) next to the post-casting strip (19); S2. Connect the post-casting strip (19) and the sump (20) through a 200 mm diameter PVC sleeve (18); S3. Flushing the cast-in belt (19) with a high-pressure water gun allows the slurry to flow into the sump (20) through the PVC casing (18); S4. Prefabricate the post-casting strip template and hoist the post-casting strip template into place; S5. Pouring of foundation slab; S6. Concrete pouring of post-cast zone (19); S7. Seal the joints with grouting.

7. The construction method for pouring the post-cast strip according to claim 6, characterized in that: The bottom of the sump (20) is lower than the bottom of the post-cast strip (19), and the height difference is not less than 300 mm. The bottom of the post-cast strip (19) is provided with a slope of 3%-5%.

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