A wall formwork support structure of a column-slab wall slope protection structure and a construction method thereof

Abstract

The present invention discloses a wall formwork structure of a column-slab wall slope protection structure, including a single-sided formwork, the formwork is arranged between two adjacent reinforced concrete columns, and its two ends are in contact with the surface of the reinforced concrete column, a plurality of square timbers are arranged vertically and at intervals on the back of the formwork, a plurality of horizontal longitudinal tie bars are arranged closely on the back of the square timbers, and the two ends of the longitudinal tie bars are respectively fixed on the two reinforced concrete columns. In the wall formwork structure and its construction method, the reinforced concrete columns on the column-slab wall ground and the longitudinal tie bars arranged between the reinforced concrete columns are used as the support carriers for the horizontal resistance of the formwork, the entire formwork structure has relatively low requirements on the site, and as the height of the layered and segmented cast wall increases, the stability of the entire support system is better.

Description

Technical Field

[0001] The invention relates to a wall formwork structure and a construction method thereof, in particular to a wall formwork structure of a column-slab wall slope protection structure and a construction method thereof. Background Art

[0002] Column-slab wall construction technology is increasingly used in high slopes because it saves space, has good rigidity and high stability, and combined with prestressed anchor cable construction, it is more suitable for the protection of high and steep slopes and is becoming more and more popular in engineering construction.

[0003] The construction of the inter-column wall of the traditional column-slab wall is single-sided formwork, and steel pipe bracing or special single-sided formwork steel bracket support system is often used. These two support methods have high requirements for the site. The higher the height of the column-slab wall, the larger the site area required when using steel pipe bracing as single-sided formwork support, the longer the bracing length, the more the number, and the worse the stability of the support system; the higher the height of the column-slab wall, the higher the height of the steel support system, the larger the geometric size, the higher the cost, and the larger the support site required when using a special formwork steel support system. Summary of the invention

[0004] The object of the present invention is to provide a wall formwork structure of a column-slab wall slope protection structure and a construction method thereof. In the wall formwork structure and the construction method thereof, reinforced concrete columns on the column-slab wall ground and longitudinal reinforcement bars arranged between the reinforced concrete columns are used as support carriers for the horizontal resistance of the formwork. The entire formwork structure has relatively low requirements on the site, and as the height of the layered and segmented cast wall increases, the stability of the entire support system is better.

[0005] The technical solution of the present invention is as follows: a wall formwork structure of a column-slab wall slope protection structure, including a single-sided formwork, the formwork is arranged between two adjacent reinforced concrete columns, and its two ends are in contact with the surface of the reinforced concrete column, a plurality of square timbers are arranged vertically and at intervals on the back of the formwork, a plurality of horizontal and spaced longitudinal tie bars are closely arranged on the back of the square timbers, and the two ends of the longitudinal tie bars are respectively fixed on the two reinforced concrete columns.

[0006] In the wall formwork structure of the aforementioned column-slab wall slope protection structure, a plastic sleeve is arranged inside the reinforced concrete column. After the longitudinal reinforcement passes through the plastic sleeve, the other end thereof extends to the outside of the reinforced concrete column, and the extended end is fixed by a nut.

[0007] In the wall formwork structure of the aforementioned column-slab wall slope protection structure, a wedge-shaped pad is sleeved on the protruding end, and nuts are provided on the longitudinal tie bars outside the wedge-shaped pad.

[0008] In the wall formwork structure of the aforementioned column-slab wall slope protection structure, a steel tripod is provided inside the reinforced concrete column next to the plastic sleeve.

[0009] In the wall formwork structure of the aforementioned column-slab wall slope protection structure, the bottommost longitudinal tie bar is 200-300mm above the ground.

[0010] A construction method for a wall formwork structure of a column-slab wall slope protection structure, the construction method comprising the following steps:

[0011] A. Calculate the diameter of the longitudinal reinforcement and the upper and lower spacing based on the height of each slab wall concrete pouring and the column spacing between adjacent reinforced concrete columns;

[0012] B. When pouring concrete for reinforced concrete columns, set the spacing according to the longitudinal reinforcement, set plastic sleeves on the steel cage of the reinforced concrete column, and plug the two sides of the plastic sleeves with sponge strips;

[0013] C. After the reinforced concrete column is poured and the formwork is removed, chisel out the concrete at the holes at both ends of the plastic sleeve and clean up the leaked slurry inside the plastic sleeve;

[0014] D. Tie up the steel bars of the slab wall between adjacent reinforced concrete columns. When the concrete of the reinforced concrete column reaches more than 75% of the design strength, support the formwork and square timber of the slab wall;

[0015] E. Insert the longitudinal reinforcement into the plastic sleeve and fix and straighten it with nuts;

[0016] F. Pour the slab wall concrete, remove the formwork, and seal the plastic casing.

[0017] In the construction method of the wall formwork structure of the column-slab wall slope protection structure, in the step B, during the setting process of the plastic sleeve, both ends of the plastic sleeve are fixed to the main reinforcement of the steel cage or the annular stirrups using #-shaped steel bars.

[0018] In the construction method of the wall formwork structure of the aforementioned column-slab wall slope protection structure, in the step B, during the setting process of the plastic sleeve, a steel tripod is set in the steel cage next to the plastic sleeve, and when the reinforced concrete column is poured, the pouring conduit passes through the steel tripod to pour concrete.

[0019] In the construction method of the wall formwork structure of the aforementioned column-slab wall slope protection structure, in the step E, after the longitudinal reinforcement is inserted into the plastic sleeve, a wedge-shaped pad is inserted into the protruding end of the longitudinal reinforcement, and then a nut is screwed in.

[0020] Beneficial effects of the invention: Compared with the prior art, the invention has the following advantages:

[0021] 1. Compared with the two existing support methods, the support structure of the present invention uses the reinforced concrete columns on the column-slab wall floor as the support carrier for the horizontal resistance of the formwork, and longitudinal reinforcements are arranged between the reinforced concrete columns to support the formwork through the longitudinal reinforcements, replacing the conventional steel pipe support or special single-side formwork steel bracket system support method. The support structure is simple and the entire formwork structure occupies a very small area;

[0022] 2. The entire formwork structure is simple and low in cost. In the early stage, the plastic sleeve is set up synchronously with the pouring of reinforced concrete columns. In the later stage, only the formwork, square timber and longitudinal reinforcement need to be installed. The installation and disassembly are relatively convenient and quick, saving a lot of construction time.

[0023] 3. Since the longitudinal reinforcement is connected to the permanent reinforced concrete column, and after the reinforced concrete column is connected to the poured wall structure, the pressure borne by the longitudinal reinforcement is finally borne by the permanent component wall and the reinforced concrete column, which has better support effect and higher safety;

[0024] 4. This formwork structure is more suitable for the support system of tall column-slab wall formwork. When the column-slab wall is cast in layers, as the number of layers increases, the rigidity and stability of the lower column-slab wall system also increase, and the support stability of the entire formwork structure system becomes more solid. This is not available in the existing support system. As the height of the column-slab wall increases, its stability becomes better, and the longitudinal reinforcement has a better support effect on the formwork.

[0025] 5. The longitudinal reinforcement in the entire support system can be reused, arranged flexibly, and is easy to operate. It is suitable for wooden formworks, and is more suitable for combined steel formworks or large steel formworks. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 It is a schematic diagram of the top view of the structure of the present invention;

[0027] Attached Figure 2 For attachment Figure 1 AA section structural diagram;

[0028] Attached Figure 3 For attachment Figure 1 Schematic diagram of the facade structure.

[0029] Figure numerals: 1-formwork, 2-reinforced concrete column, 3-square timber, 4-longitudinal tie rod, 5-plastic sleeve, 6-nut, 7-wedge-shaped spacer, 8-reinforcement tripod. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0031] Embodiment of the present invention: A wall formwork structure of a column-slab wall slope protection structure, as shown in the attached Figure 1-3 As shown, the conventional setting of the column-slab wall slope protection structure includes reinforced concrete columns 2 arranged at a certain distance, and wall panels are cast between two adjacent reinforced concrete columns 2. The wall panels are connected with the reinforced concrete columns 2 to form the entire column-slab wall slope protection structure. The wall formwork structure of the column-slab wall slope protection structure includes a vertically arranged formwork 1, which is arranged between two adjacent reinforced concrete columns 2, and its two ends are in contact with the surface of the reinforced concrete columns 2 to prevent the wall panel concrete from flowing out from the gap between the end of the formwork 1 and the reinforced concrete columns 2 during the pouring process. A plurality of square timbers 3 are arranged vertically and at intervals on the back of the formwork 1. The square timbers 3 can also be replaced by steel pipes. A plurality of horizontal and spaced longitudinal reinforcements 4 are arranged on the back of the square timbers 3. The timbers 3 fit the longitudinal reinforcements 4, and the two ends of the longitudinal reinforcements 4 are respectively fixed on the two reinforced concrete columns 2.

[0032] During the use of the formwork support structure, when pouring the wallboard concrete, the concrete exerts lateral pressure on the formwork 1, and the lateral pressure is transmitted to the longitudinal reinforcement 4 at the back through the square wood 3 at the back, and the lateral pressure on the formwork 1 is borne by the longitudinal reinforcement 4. Since the two ends of the longitudinal reinforcement 4 are respectively fixedly connected to the two reinforced concrete columns 2, it is ensured that the longitudinal reinforcement 4 will not be infinitely deformed backwards, thereby ensuring that the displacement of the formwork 1 will not exceed the allowable range. The purpose of setting the square wood 3 and the contact between the square wood 3 and the longitudinal reinforcement 4 is to ensure that the lateral pressure on the surface of the formwork 1 can be transmitted to the longitudinal reinforcement 4 in contact with it at the rear through the adjacent square wood 3.

[0033] The reinforced concrete column 2 is provided with a plastic sleeve 5, the diameter of which is 5-10 mm larger than the longitudinal reinforcement 4. After the longitudinal reinforcement 4 passes through the plastic sleeve 5, the other end thereof extends to the outside of the reinforced concrete column 2, and the extended end thereof is fixed by a nut 6. The plastic sleeve 5 is provided to facilitate the insertion of the longitudinal reinforcement 4, and the longitudinal reinforcement 4 is fixed by the nut 6 after passing through the reinforced concrete column 2. The entire reinforced concrete column 2 is subjected to the pressure of the longitudinal reinforcement 4, and the longitudinal reinforcement 4 is prevented from being separated from the reinforced concrete column 2 under the action of a large pressure.

[0034] A wedge-shaped pad 7 is sleeved on the protruding end, and a nut 6 is provided on the longitudinal tension bar 4 outside the wedge-shaped pad 7. The wedge-shaped pad 7 is provided so that the bottom surface of the nut 6 acts vertically on the surface of the wedge-shaped pad 7, and the longitudinal tension bar 4 can be made straight and taut by tightening the nut 6 more conveniently.

[0035] A steel tripod 8 with a diameter of more than 12 mm is provided inside the reinforced concrete column 2 next to the plastic sleeve 5. During the pouring process of the reinforced concrete column 2, the plastic sleeve 5 needs to be fixed on its steel cage, and then concrete is poured through the pouring conduit. The pouring conduit will swing under the pressure of the concrete. In order to avoid contact with the plastic sleeve 5 during the swinging process, so that the position of the plastic sleeve 5 is offset, a steel tripod 8 is provided. The steel tripod 8 is fixed to the steel cage of the reinforced concrete column 2, and the pouring conduit passes through the steel tripod 8 to pour concrete. The pouring conduit will only touch the steel tripod 8 during the swinging process.

[0036] The bottom longitudinal tie bar 4 is 200-300mm above the ground. If it is too low, it is inconvenient to install and remove the longitudinal tie bar 4. If it is too high, the bottom formwork 1 will move outward under the lateral pressure of the poured concrete. This setting facilitates the construction of the longitudinal tie bar 4 and ensures that the formwork 1 will not move outward under the lateral pressure of the poured concrete, ensuring the flatness of the poured wall, and the bottom formwork 1 will not be greatly deformed or damaged.

[0037] A construction method for a wall formwork structure of a column-slab wall slope protection structure, the construction method comprising the following steps:

[0038] A. Calculate the diameter and upper and lower spacing of the longitudinal reinforcement 4 according to the height of each slab wall concrete pouring and the column spacing between adjacent reinforced concrete columns 2. This calculation method can refer to the force calculation method of simply supported beams, which are all existing technologies.

[0039] B. When pouring concrete of the reinforced concrete column 2, a spacing is set according to the longitudinal reinforcement 4, and a plastic sleeve 5 is set on the steel cage of the reinforced concrete column 2. Both sides of the plastic sleeve 5 are blocked with sponge strips to prevent slurry from entering the plastic sleeve 5 when pouring concrete.

[0040] C. After the reinforced concrete column 2 is poured and the formwork is removed, the concrete at the holes at both ends of the plastic sleeve 5 is chiseled out and the leaked slurry inside the plastic sleeve 5 is cleaned to facilitate the subsequent insertion of the longitudinal reinforcement 4.

[0041] D. Tie up the slab wall reinforcements between adjacent reinforced concrete columns 2. When the concrete of the reinforced concrete column 2 reaches more than 75% of the design strength, support the slab wall formwork 1 and square timber 3.

[0042] E. Insert the longitudinal tie rod 4 into the plastic sleeve 5 and fix and straighten it with the nut 6.

[0043] F. Pour the slab wall concrete. After the slab wall concrete reaches the required strength, remove the longitudinal reinforcement 4 and the formwork 1, and use concrete to fill the plastic sleeve 5 to make the reinforced concrete column 2 structure complete.

[0044] In the step B, during the setting process of the plastic sleeve 5, both ends of the plastic sleeve 5 are fixed to the main reinforcement of the steel cage or the annular stirrups using #-shaped steel bars to ensure that the position of the plastic sleeve 5 is fixed and will not be displaced.

[0045] In the step B, during the setting process of the plastic sleeve 5, a steel tripod 8 is set in the steel cage beside the plastic sleeve 5, and when the reinforced concrete column 2 is poured, the pouring conduit passes through the steel tripod 8 to pour concrete, so as to prevent the pouring conduit from colliding with the reserved sleeve 5 during the concrete pouring.

[0046] In step E, after the longitudinal tie bar 4 is inserted into the plastic sleeve 5, a wedge-shaped spacer 7 is inserted into the extended end of the longitudinal tie bar 4, and then the nut 6 is screwed in. Ensure that the longitudinal tie bar 4 is straight and tight.

Claims

1. A wall formwork structure of a column-slab wall slope protection structure, characterized in that: The invention comprises a single-sided template (1), the template (1) being arranged between two adjacent reinforced concrete columns (2), and having two ends in contact with the surface of the reinforced concrete column (2), a plurality of square timbers (3) being arranged vertically and at intervals on the back of the template (1), a plurality of longitudinal tie bars (4) being arranged horizontally and at intervals on the back of the square timbers (3), and the two ends of the longitudinal tie bars (4) being respectively fixed on the two reinforced concrete columns (2); A plastic sleeve (5) is provided inside the reinforced concrete column (2); after the longitudinal reinforcement (4) passes through the plastic sleeve (5), the other end thereof protrudes to the outside of the reinforced concrete column (2), and the protruding end thereof is fixed by a nut (6); A wedge-shaped pad (7) is sleeved on the protruding end, and a nut (6) is provided on the longitudinal reinforcement (4) outside the wedge-shaped pad (7); a steel cage is provided inside the reinforced concrete column (2); A steel tripod (8) is provided inside the steel cage next to the plastic sleeve (5); When the reinforced concrete column (2) is poured, the pouring conduit passes through the steel tripod (8) to pour concrete, and the pouring conduit only comes into contact with the steel tripod (8) during the pouring process; The bottom longitudinal reinforcement (4) is 200-300 mm above the ground.

2. A construction method for the wall formwork structure of the column-slab wall slope protection structure according to claim 1, characterized in that: The construction method includes the following steps: A. Calculate the diameter and upper and lower spacing of the longitudinal reinforcement (4) based on the height of each slab wall concrete pouring and the column spacing between adjacent reinforced concrete columns (2); B. When pouring concrete of the reinforced concrete column (2), a spacing is set according to the longitudinal reinforcement (4), a plastic sleeve (5) is set on the steel cage of the reinforced concrete column (2), and both sides of the plastic sleeve (5) are blocked with sponge strips; C. After the reinforced concrete column (2) is poured and the formwork is removed, the concrete at the openings at both ends of the plastic sleeve (5) is chiseled out, and the leaked slurry inside the plastic sleeve (5) is cleaned; D. Tie the steel bars of the slab wall between adjacent reinforced concrete columns (2). When the concrete of the reinforced concrete column (2) reaches more than 75% of the design strength, support the formwork (1) and square timber (3) of the slab wall; E. Insert the longitudinal tie rod (4) into the plastic sleeve (5) and fix and straighten it with the nut (6); F. After pouring the slab wall concrete and removing the formwork (1), fill and seal the plastic sleeve (5).

3. The construction method of the wall formwork structure of the column-slab wall slope protection structure according to claim 2 is characterized by: In the step B, during the setting process of the plastic sleeve (5), both ends of the plastic sleeve (5) are fixed to the main reinforcement of the steel cage or the annular stirrups by using #-shaped steel bars.

4. The construction method of the wall formwork structure of the column-slab wall slope protection structure according to claim 2 is characterized by: In the step B, during the setting process of the plastic sleeve (5), a steel tripod (8) is set in the steel cage next to the plastic sleeve (5), and when the reinforced concrete column (2) is poured, the pouring conduit passes through the steel tripod (8) to pour concrete.

5. The construction method of the wall formwork structure of the column-slab wall slope protection structure according to claim 2 is characterized by: In the step E, after the longitudinal tie bar (4) is inserted into the plastic sleeve (5), a wedge-shaped pad (7) is inserted into the protruding end of the longitudinal tie bar (4), and then the nut (6) is screwed in.

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