Construction process applied to sawtooth-shaped post-cast strip of concrete large bottom plate

Abstract

The invention relates to a construction technology applied to a zigzag post-cast strip of a concrete large bottom plate, and relates to the technical field of constructional engineering, and the construction technology comprises the following steps: setting up zigzag boundary fences for a first area and a second area on two sides of the post-cast strip; steel bars are bound in the first area, the second area and the post-cast strip at the same time; after the steel bars are bound, concrete is poured into the first area and the second area to form a concrete bottom plate; and after the steps are completed, concrete is poured into the post-cast strip. The fence does not need to be dismantled, and a dismantling operation space does not need to be reserved, so that the steel bars of the post-cast strip and the steel bars of the adjacent area can be bound at the same time, the concrete integrity can be better, the strength of the concrete bottom plate is improved, meanwhile, the post-cast strip can be poured immediately after concrete pouring of the adjacent area is completed, and the construction efficiency is improved. The time interval of traditional procedures is greatly shortened, the construction period can be effectively and greatly shortened, and the basement project progress is accelerated.

Description

Technical Field

[0001] The present application relates to the field of construction engineering technology, and in particular to a construction process for a zigzag post-cast strip of a large concrete base slab. Background Art

[0002] In many large high-rise buildings, the area of ​​the basement concrete slab is generally very large. When constructing the concrete slab, it is often necessary to construct and pour concrete in different areas. It is often necessary to leave a long strip of a certain width between different areas, and pour the long strip after the concrete pouring of the adjacent areas is completed and reaches a certain strength. This long strip is generally called a post-cast strip.

[0003] Regarding the above-mentioned related technologies, at present, the traditional post-casting belt casting process is roughly as follows: (1) First, pour the concrete bottom plate of the adjacent two sides of the post-cast strip (build wooden formwork or dense steel wire mesh as enclosures at the boundaries of the two sides in advance); (2) After the concrete slabs on both sides have formed a certain strength, remove the enclosures, then roughen the sides of the concrete slabs and clean up the garbage; (3) Lower and tie the steel bars in the post-cast strip area; (4) Pour the concrete in the post-cast strip area, and finally form a large bottom plate. In this process, the contact surface between the post-cast strip and the adjacent area is a vertical surface.

[0004] This traditional process has the following defects: (1) The boundary surfaces of adjacent concrete slabs need to be roughened, and after roughening, the garbage needs to be cleaned up. The construction of the post-casting joint can only begin after the garbage is cleared. The process is relatively cumbersome and the construction period is long. (2) The boundary surface after roughening is uneven, which affects the appearance and the image of civilized construction. (3) If the garbage is not cleaned up properly after roughening, the fit between the post-casting joint and the concrete in the adjacent area will be reduced, which is easy to cause cracks, allowing the foundation moisture to penetrate into the base plate, reducing the overall quality of the large base plate. Summary of the invention

[0005] The purpose of this application is to provide a construction process for a zigzag post-cast strip of a large concrete base slab to solve the problems in the background technology.

[0006] In the first aspect, the construction process for the zigzag post-cast strip of the concrete base plate provided in the present application adopts the following technical solution: comprising the following steps: (1) Set up zigzag boundary fences for Area 1 and Area 2 on both sides of the post-cast zone; (2) Tie the steel bars in area 1, area 2 and the post-cast zone at the same time; (3) After the steel bars are tied, pour concrete into Area 1 and Area 2 to form a concrete base plate; (4) After completing the above steps, pour concrete into the post-casting zone.

[0007] By adopting the above technical solution, the tedious work of dismantling fences, roughening, cleaning up garbage, etc. is eliminated, which saves time and reduces manpower investment.

[0008] Preferably, in the step (1), the enclosure material is a corrugated water-stopping steel plate bent into a sawtooth shape.

[0009] By adopting the above technical solution, the zigzag enclosure can make the concrete of the post-cast zone and the adjacent area fit more tightly after micro-expansion, thereby improving the integrity of the concrete base plate and reducing the possibility of later cracks in the concrete.

[0010] Preferably, the corrugated waterstop steel plate is fixed on the foundation, multiple sections of the corrugated waterstop steel plate are fixed along the boundary line between area one and area two, and adjacent corrugated waterstop steel plates are welded and fixed.

[0011] By adopting the above technical solution, area 1 and area 2 with longer boundary lines can be welded and fixed by multiple sections of corrugated water-stop steel plates to ensure better overall casting.

[0012] Preferably, an expansion rubber waterstop strip is affixed to the corners of the corrugated waterstop steel plate.

[0013] By adopting the above technical solution, the expansion rubber water stop strip can reduce the possibility of water seepage at the contact point between the post-cast strip and the adjacent area, thereby improving the anti-seepage performance of the base plate.

[0014] Preferably, the steel bars of the post-cast strip in step (2) can be tied with the steel bars of the adjacent area one and area two.

[0015] By adopting the above technical solution, by tying the steel bars between the post-cast strip and the adjacent areas 1 and 2, the integrity of the concrete between the three areas can be improved, thereby improving the strength of the concrete base plate.

[0016] Preferably, the concrete poured in step (3) and step (4) is made of a material with micro-expansion properties.

[0017] By adopting the above technical solution, the post-cast strip can be tightly engaged with the concrete slab in the adjacent area, and the steel plate can be compacted to avoid gaps between the steel plates.

[0018] On the second aspect, the construction process provided in the present application for the serrated post-cast strip of the large concrete base plate adopts the following technical solution: steel bar positioning components are provided on the upper and lower walls on the inner side of the serrated groove of the corrugated water-stop steel plate, and each of the steel bar positioning components on the inner wall of the serrated groove is provided with no less than two groups.

[0019] By adopting the above technical scheme, multiple groups of steel bar positioning components are arranged on the upper and lower walls of the serrated groove of the corrugated waterstop steel plate, so that the corrugated waterstop steel plates on both sides of the post-cast strip can be connected and fixed to the steel bars, thereby improving the stability between the two and improving the overall stability after subsequent concrete pouring.

[0020] Preferably, the steel bar positioning assembly includes a fixed seat, a through hole, a movable inner groove, a clamping block 1, a clamping block 2, a push-pull rod and a knob. The fixed seat is installed on the inner wall of the serrated groove of the corrugated water-stop steel plate. A transverse through hole is provided in the middle of the fixed seat, and a longitudinal movable inner groove is provided in the upper inner part of the fixed seat. The movable inner groove is movably provided with a clamping block 1 and a clamping block 2. A push-pull rod with a thread is provided in the middle of the clamping block 2. The push-pull rod passes through the clamping block 1 and extends out of the fixed seat and is threadedly connected to the middle of the knob.

[0021] By adopting the above technical solution, it is convenient to quickly connect and fix the steel bars to the corrugated waterstop steel plates.

[0022] Preferably, an arc-shaped groove is provided on one side of the bottom of the first and second card blocks that are close to each other.

[0023] By adopting the above technical solution, the arc-shaped grooves arranged at the bottom of the first clamping block and the second clamping block can conveniently clamp the steel bars.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The enclosures set up in this application do not need to be dismantled, and there is no need to leave space for dismantling operations. Therefore, the steel bars of the post-cast strips can be tied together with the steel bars in the adjacent areas at the same time, which can improve the integrity of the concrete and increase the strength of the concrete base plate. At the same time, the post-cast strips can be poured immediately after the concrete pouring in the adjacent areas is completed, eliminating the tedious work of dismantling enclosures, roughening, and cleaning up garbage. Therefore, the time interval of traditional processes is greatly compressed, time is saved and manpower investment is reduced, which can effectively and significantly shorten the construction period and speed up the progress of the basement project.

[0025] 2. The enclosure material set up in this application adopts a corrugated water-stop steel plate bent into a serrated shape. The serrated enclosure can make the concrete of the post-cast zone and the adjacent area fit more tightly after micro-expansion, improve the integrity of the base plate, and reduce the possibility of later cracks in the concrete.

[0026] 3. In the present application, an expansion rubber waterstop strip is affixed at the corner of the corrugated waterstop steel plate. The expansion rubber waterstop strip can reduce the possibility of water seepage at the contact point between the post-cast strip and the adjacent area, thereby improving the anti-seepage performance of the base plate.

[0027] 4. The steel plate used as the enclosure in this application is left in the concrete without being removed, and the concrete can be directly poured together with the post-cast strip, which can further strengthen the strength of the base plate. The enclosure does not need to be removed and roughening can be avoided, so that the boundary surface between area one and area two can be kept clean and smooth. The aesthetics and appearance of the construction process are greatly improved. In addition, since garbage generated during the removal of the enclosure and roughening is avoided, the degree of environmental protection is improved, and the quality of civilized construction is also improved.

[0028] 5. The present application sets multiple groups of steel bar positioning components on the upper and lower walls of the serrated groove of the corrugated waterstop steel plate, which can connect and fix the corrugated waterstop steel plates on both sides of the post-cast strip with the steel bars, thereby improving the stability between the two and improving the overall stability after subsequent concrete pouring.

[0029] 6. The steel bar positioning assembly provided in the present application can quickly position the steel bars for fast connection and fixation, which is convenient and fast, saving time and reducing manpower input. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the structure of Example 1 of the present application; Figure 2 This is a schematic diagram of the structure of pouring concrete into the post-cast zone in Example 1 of the present application; Figure 3 is a schematic diagram of the structure of Example 2 of the present application; Figure 4 It is a structural schematic diagram of a steel bar positioning assembly according to Example 2 of the present application; Figure 5 It is a schematic diagram of the side view structure of the steel bar positioning assembly of Example 2 of the present application; Figure 6 It is a schematic diagram of the internal structure of the steel bar positioning component in side view of Example 2 of the present application.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. Corrugated waterstop steel plate; 2. Expandable rubber waterstop strip; 3. Steel bar positioning assembly; 31. Fixed seat; 32. Perforation; 33. Movable inner groove; 34. Block one; 35. Block two; 36. Push-pull rod; 37. Knob; a. Area one; b. Area two; c. Post-cast strip; d. Foundation. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0033] Embodiment 1: A construction process for a zigzag post-cast strip applied to a large concrete floor slab, comprising the following steps: (1) Set up zigzag boundary fences for area 1a and area 2b on both sides of the post-cast zone c, such as Figure 1 As shown, the enclosure material adopts a corrugated waterproof steel plate 1 bent into a zigzag shape to replace the vertical baffles such as wooden formwork or dense mesh wire mesh in traditional processes. The zigzag enclosure can make the concrete of the post-casting strip c and the adjacent area bite more tightly after slight expansion, so that the integrity of the concrete base plate is better and the possibility of late cracks in the concrete is reduced. The corrugated waterproof steel plate 1 is fixed on the foundation d, and the multi-section corrugated waterproof steel plate 1 is fixed along the boundary line of area a and area b, and the adjacent corrugated waterproof steel plates 1 are welded and fixed. The area a and area b with longer boundary lines can be welded and fixed by multi-section corrugated waterproof steel plates 1 to ensure better overall casting. Then, an expansion rubber waterstop strip 2 is affixed to the corner of the corrugated waterproof steel plate 1. The set expansion rubber waterstop strip 2 can reduce the possibility of water seepage at the contact part between the post-casting strip c and the adjacent area, thereby improving the anti-seepage performance of the base plate. (2) Figure 1 In the shown area 1a, area 2b and post-casting zone c, steel bars are tied at the same time. The steel bars can be used as a supporting tool for the steel plate to prevent the concrete from tilting the steel plate during the subsequent pouring process. The steel bars of the post-casting zone c can be tied with the steel bars of the adjacent area 1a and area 2b. By tying the steel bars between the post-casting zone c and the adjacent area 1a and area 2b, the integrity of the concrete between the three can be improved, thereby improving the strength of the concrete bottom plate. (3) After the steel bars are tied, pour concrete into area 1a and area 2b to form a concrete base plate. Figure 1 The effect shown; (4) After completing the above steps, pour concrete into the post-cast zone c to form Figure 2 The effect is shown.

[0034] After implementing the above steps, the tedious work of dismantling the enclosure and mold, roughening, cleaning up garbage, etc. can be omitted, which saves time and reduces manpower investment.

[0035] It should be noted that the concrete poured in step (3) and step (4) is made of a material with micro-expansion properties, so that the post-cast strip c can fit tightly with the concrete slab in the adjacent area and can compact the steel plate to avoid gaps between the steel plates.

[0036] Example 2: Construction technology for zigzag post-casting strips of concrete slabs, such as Figure 3As shown, steel bar positioning components 3 are provided on the upper and lower walls on the inner side of the serrated groove of the corrugated waterstop steel plate 1, and each serrated groove inner wall is provided with no less than two groups of steel bar positioning components 3. Multiple groups of steel bar positioning components 3 are provided on the upper and lower walls on the serrated groove of the corrugated waterstop steel plate 1, so that the corrugated waterstop steel plates 1 on both sides of the post-cast strip c can be connected and fixed with the steel bars, thereby improving the stability between the two and improving the overall stability after subsequent concrete pouring. Since the boundary lines of each area are relatively long, multiple sections of corrugated waterstop steel plates 1 are fixed along the boundary lines of area one a and area two b, and adjacent corrugated waterstop steel plates 1 are welded and fixed. Therefore, multiple groups of steel bar positioning components 3 are provided on the inner wall of each serrated groove. The specific number can be set according to the actual boundary line and the steel bars required to be tied, and is not limited here.

[0037] like Figure 4-Figure 6 As shown, the steel bar positioning assembly 3 provided in the present application includes a fixed seat 31, a through hole 32, a movable inner groove 33, a clamping block 1 34, a clamping block 2 35, a push-pull rod 36 and a knob 37. The fixed seat 31 is installed on the inner wall of the serrated groove of the corrugated water-stop steel plate 1. A transverse through hole 32 is provided in the middle of the fixed seat 31, and a longitudinal movable inner groove 33 is provided in the upper inner part of the fixed seat 31. The movable inner groove 33 is movably provided with a clamping block 1 34 and a clamping block 2 35. A threaded push-pull rod 36 is provided in the middle of the clamping block 2 35. The push-pull rod 36 passes through the clamping block 1 34 and extends out of the fixed seat 31 and is threadedly connected to the middle of the knob 37. The provided steel bar positioning assembly 3 facilitates the rapid connection and fixation of the steel bar to the corrugated water-stop steel plate 1.

[0038] Among them, an arc-shaped groove is provided on one side close to the bottom of the clamping block 1 34 and the clamping block 2 35. The arc-shaped groove provided at the bottom of the clamping block 1 34 and the clamping block 2 35 can facilitate the clamping of the steel bar.

[0039] The specific working principle of the steel bar positioning component 3 is as follows: The fixing seat 31 in the steel bar positioning component 3 is fixed on the upper and lower walls on the inner side of the serrated groove of the corrugated water-stop steel plate 1. When tying the steel bars, the steel bars are inserted into the through holes 32, and then the knob 37 is turned clockwise. The push-pull rod 36 can be pushed outward through the thread, and the push-pull rod 36 drives the second clamping block 35 to move outward on the inner side of the movable inner groove 33. At the same time, after the knob 37 is rotated, it will move inward through the thread and squeeze the first clamping block 34, so that the first clamping block 34 and the second clamping block 35 move relative to each other, and the arc-shaped grooves at the bottom of the first clamping block 34 and the second clamping block 35 gradually squeeze the steel bars, so that the steel bars are clamped and positioned, and the steel bars are quickly connected to the corrugated water-stop steel plate 1. The knob 37 is turned counterclockwise to loosen the steel bars. The steel bar positioning component 3 is set to realize the quick connection and fixation of the steel bars and the corrugated water-stop steel plate 1. Manual operation is convenient and fast, and it will not be time-consuming and labor-intensive, and the stability is improved after the connection.

[0040] The present application provides a construction process for a zigzag post-cast strip for a large concrete base plate. The set enclosure does not need to be removed, and there is no need to leave a working space for removal. Therefore, the steel bars of the post-cast strip can be tied together with the steel bars in the adjacent area at the same time, which can make the concrete more integrated and improve the strength of the concrete base plate. At the same time, the post-cast strip can be poured immediately after the concrete pouring in the adjacent area is completed, eliminating the tedious work of removing the enclosure, demolding, roughening, cleaning up garbage, etc., thereby greatly compressing the time interval of the traditional process, saving time and reducing manpower investment, which can effectively shorten the construction period and speed up the progress of the basement project. The set enclosure material adopts a corrugated waterstop steel plate 1 bent into a zigzag shape. The zigzag enclosure can make the post-cast strip c and the concrete in the adjacent area fit more tightly after slight expansion, so that the integrity of the base plate is better and the possibility of late cracks in the concrete is reduced. The expansive rubber waterstop strip 2 is affixed at the corner of the corrugated waterstop steel plate. The set expansive rubber waterstop strip 2 can make the post-cast strip c and the adjacent area fit more tightly. The contact parts between the two reduce the possibility of water seepage, and improve the anti-seepage performance of the base plate; the steel plate used as the enclosure is left in the concrete without being removed, and the concrete can be directly poured together with the post-cast strip c, which can further strengthen the strength of the base plate. The enclosure does not need to be removed and roughening can also be avoided, so that the boundary surface of area a and area b can be kept clean and smooth, and the aesthetics and appearance of the construction process are greatly improved. In addition, since garbage generated during the removal of the enclosure and roughening is avoided, the environmental protection level is improved, and the quality of civilized construction is also improved. A plurality of groups of steel bar positioning components 3 are arranged on the upper and lower walls of the serrated groove of the corrugated water-stop steel plate 1, which can connect and fix the corrugated water-stop steel plates 1 on both sides of the post-cast strip c with the steel bars, thereby improving the stability between the two and improving the overall stability after the subsequent pouring of concrete. In addition, the arranged steel bar positioning components can quickly position the steel bars for fast connection and fixation, which is convenient and fast, saves time and reduces manpower investment.

[0041] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. The construction process of the zigzag post-casting strip applied to the concrete large base plate is characterized by: The steps include: (1) Set up zigzag boundary fences for area 1 (a) and area 2 (b) on both sides of the post-cast zone (c); (2) Tie the steel bars simultaneously in area 1 (a), area 2 (b) and post-cast zone (c); (3) After the steel bars are tied, pour concrete into area 1 (a) and area 2 (b) to form a concrete base plate; (4) After completing the above steps, pour concrete into the post-casting zone (c).

2. The construction process of the zigzag post-casting strip applied to the concrete base plate according to claim 1 is characterized in that: In the step (1), the enclosure material is a corrugated water-stopping steel plate (1) bent into a sawtooth shape.

3. The construction process of the zigzag post-casting strip applied to the concrete base plate according to claim 2 is characterized in that: The corrugated waterstop steel plate (1) is fixed on the foundation (d), and multiple sections of the corrugated waterstop steel plate (1) are fixed along the boundary line between area 1 (a) and area 2 (b), and adjacent corrugated waterstop steel plates (1) are welded and fixed.

4. The construction process of the zigzag post-casting strip applied to the concrete base plate according to claim 2 is characterized in that: An expansion rubber water stop strip (2) is attached to the corner of the profiled water stop steel plate (1).

5. The construction process of the zigzag post-casting strip applied to the concrete base plate according to claim 1 is characterized in that: In the step (2), the steel bars of the post-cast zone (c) can be tied together with the steel bars of the adjacent area 1 (a) and area 2 (b).

6. The construction process of the zigzag post-casting strip applied to the concrete base plate according to claim 1 is characterized in that: The concrete poured in step (3) and step (4) is made of a material with micro-expansion properties.

7. The construction process of the zigzag post-casting strip applied to the concrete base plate according to claim 3 is characterized in that: The upper and lower walls on the inner side of the sawtooth groove of the profiled water-stop steel plate (1) are both provided with steel bar positioning components (3).

8. The construction process of the zigzag post-casting strip applied to the concrete base plate according to claim 7 is characterized in that: Each of the inner walls of the sawtooth grooves is provided with at least two sets of steel bar positioning components (3).

9. The construction process of the zigzag post-casting strip applied to the concrete base plate according to claim 8 is characterized in that: The steel bar positioning assembly (3) comprises a fixed seat (31), a through hole (32), a movable inner groove (33), a first clamping block (34), a second clamping block (35), a push-pull rod (36) and a knob (37). The fixed seat (31) is mounted on the inner wall of the sawtooth groove of the corrugated water-stop steel plate (1). A transverse through hole (32) is provided in the middle of the fixed seat (31). A longitudinal movable inner groove (33) is provided in the upper inner portion of the fixed seat (31). A first clamping block (34) and a second clamping block (35) are movably provided inside the movable inner groove (33). A push-pull rod (36) with a thread is provided in the middle of the second clamping block (35). The push-pull rod (36) passes through the first clamping block (34) and extends out of the fixed seat (31) to be threadedly connected to the middle of the knob (37).

10. The construction process of the zigzag post-casting strip applied to the concrete base plate according to claim 9, characterized in that: An arc-shaped groove is provided on one side of the bottom of the first clamping block (34) and the second clamping block (35) close to each other.

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