Construction method of stepped auditorium step plate

Abstract

The application discloses a kind of stepped auditorium step board construction methods, by plugging the gap between the structure girder and floor of plugging sand box, and in plugging sand box pouring sand to support the bottom formwork of step board, by roller to reduce the moving resistance of plugging sand box in later period, utilize the plugging sand box of special structure to take out the sand of the back of multiple steps of the lower end of step board, finally through the bottom formwork of step board of reserved ventilation pipe of step board, and utilize clear water to wash floor, clean all residual sand, save the construction period of step board, save construction cost.The application solves the problem that the lower space of multiple steps of the lower end of step board of theatre building structure is influenced by structure girder, and construction personnel enters lower space and removes formwork difficultly.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a method for constructing stepped tiered seating slabs. Background Technology

[0002] In theater-type building structures, tiered seating requires ventilation for each seat, necessitating the installation of numerous ventilation sleeves on the tiered slabs. The back of the tiered slabs is cast into the main building. The space beneath several steps at the lower end of the tiered slabs is restricted by the main structural beams, preventing workers from accessing this space for formwork removal.

[0003] If the lower space adopts a non-removable formwork method, it will affect the ventilation efficiency, and the formwork wood may rot and produce odors later, affecting the performance effect of the stage area.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, a construction method for stepped seating slabs is provided to solve the problem that the lower space of multiple steps in the stepped slabs of theater-type building structures is affected by the main structural beams, making it difficult for construction workers to enter the lower space for formwork removal.

[0006] To achieve the above objectives, a method for constructing tiered seating slabs is provided, comprising the following steps:

[0007] During the construction of the floor slab, a drainage outlet is formed in the floor slab. The drainage outlet is located below the pouring position of the stepped slab and on the side of the main structural beam away from the lower end of the stepped slab.

[0008] Multiple rollers are laid on the floor slab, and the multiple rollers are arranged along the length direction of the stepped slab;

[0009] A bottomless sealing sandbox is placed on the multiple rollers. The top elevation of the sealing sandbox is adapted to the bottom elevation of the main structural beam. The sealing sandbox has an open end and a closed end. The closed end seals the gap between the main structural beam and the floor slab. The open end is located below multiple steps at the lower end of the stepped slab. The open end is equipped with an inward-opening door.

[0010] Sand is poured into the sealing sandbox, and the top of the sand in the sealing sandbox extends to the outside of the sealing sandbox and forms a stepped shape;

[0011] A spliced ​​bottom mold for laying the stepped slabs on stepped sand;

[0012] The stepped slab is formed by casting on the bottom mold;

[0013] The sealing sandbox is pulled out through the gap, and the sand inside the sealing sandbox is poured out, so that the remaining sand is piled on the floor slab.

[0014] The open end of the empty sealing sand box is inserted under the lower end of the step plate through the gap, so that the remaining sand is poured into the sealing sand box through the open end.

[0015] The sealing sandbox is then pulled out through the gap again, and the sand inside the sealing sandbox is poured out.

[0016] The tamping rod is used to tamp the spliced ​​bottom mold through the pre-embedded ventilation pipe of the stepped plate, so that the spliced ​​bottom mold separates from the stepped plate;

[0017] The spliced ​​bottom mold is removed through the gap;

[0018] Cleaning water is injected into the pre-embedded ventilation pipe to rinse the floor slab, so that the cleaning water carrying residual sand is discharged through the drain outlet.

[0019] Furthermore, a traction rope is connected to the closed end, and a winch is installed on the floor slab, with the traction rope connected to the drum of the winch.

[0020] Furthermore, one side of the inward-opening door is hinged to one side of the opening end, and a limiting plate is installed on the other side of the opening end. The other side of the inward-opening door abuts against the side of the limiting plate facing the closed end, and an elastic reset member is connected between the limiting plate and the inward-opening door.

[0021] Furthermore, the elastic reset element is a spring.

[0022] Furthermore, a recycling bin is provided below the drain outlet.

[0023] Furthermore, before injecting cleaning water into the pre-embedded ventilation pipe to flush the floor slab, a sandbag dike is constructed on the floor slab, the sandbag dike being located on the side of the drainage outlet away from the main structural beam.

[0024] The beneficial effects of this invention are as follows: the construction method of the stepped seating slab of this invention involves sealing the gap between the main structural beam and the floor slab using a sealing sandbox, filling the sealing sandbox with sand to support the bottom template of the stepped slab, reducing the movement resistance of the sealing sandbox later by using rollers, removing the residual sand from the back of multiple steps at the lower end of the stepped slab using a specially constructed sealing sandbox, and finally removing the bottom template of the stepped slab through the reserved ventilation pipes of the stepped slab, and washing the floor slab with clean water to remove all residual sand. This saves the construction period of the stepped slab and reduces construction costs. Attached Figure Description

[0025] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figures 1 to 5 This is a schematic diagram illustrating the steps of the construction method for the stepped seating area according to an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the inner door of the sealing sandbox in an embodiment of the present invention, showing its closed state.

[0028] Figure 7 This is a schematic diagram of the inner door of the sealing sandbox in an embodiment of the present invention, showing its open state. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Reference Figures 1 to 7 As shown, the present invention provides a method for constructing tiered seating slabs, comprising the following steps:

[0032] S1. Construction floor slab 1. During the construction of floor slab 1, a drainage outlet 10 is formed in floor slab 1. The drainage outlet 10 is located below the pouring position of step slab 11 and on the side of the main structural beam 2 away from the lower end of step slab 11.

[0033] S2. Multiple rollers 3 are laid on the floor slab 1, and the multiple rollers 3 are set along the length direction of the step slab 11.

[0034] S3. A sealing sandbox 4 without a bottom or cover is placed on multiple rollers 3. The top elevation of the sealing sandbox 4 is adapted to the bottom elevation of the main structural beam 2. The sealing sandbox 4 has an open end and a closed end. The closed end seals the gap between the main structural beam 2 and the floor slab 1. The open end is located below multiple steps at the lower end of the step plate 11. An inward-opening door 41 is installed at the open end.

[0035] In this embodiment, a traction rope 9 is connected to the closed end. A winch is installed on the floor slab 1. The traction rope 9 is connected to the drum of the winch.

[0036] In a preferred embodiment, one side of the inward-opening door 41 is hinged to one side of the open end. A limiting plate 42 is installed on the other side of the open end. The other side of the inward-opening door 41 abuts against the side of the limiting plate 42 facing the closed end. A resilient reset member 43 is connected between the limiting plate 42 and the inward-opening door 41.

[0037] In a preferred embodiment, the elastic reset member 43 is a spring.

[0038] S4. Sand material 5 is poured into the sealing sand box 4, and the top of the sand material 5 in the sealing sand box 4 extends to the outside of the sealing sand box 4 and forms a stepped shape.

[0039] S5. A spliced ​​bottom mold 6 is laid on the stepped sand material 5 with step slabs 11.

[0040] S6. A stepped slab 11 is formed by casting on the bottom mold 6.

[0041] S7. Pull out the sealing sand box 4 through the gap and pour out the sand 5 inside the sealing sand box 4 so that the remaining sand 5 is piled on the floor slab 1.

[0042] S8. Insert the open end of the empty sealing sand box 4 into the lower end of the step plate 11 through the gap, so that the remaining sand 5 is poured into the sealing sand box 4 through the open end.

[0043] S9. Pull the sealing sand box 4 out through the gap again and pour out the sand 5 inside the sealing sand box 4.

[0044] S10. The tamping rod is used to tampe the spliced ​​bottom mold 6 through the pre-embedded ventilation pipe of the step plate 11, so that the spliced ​​bottom mold 6 is separated from the step plate 11.

[0045] S11. Take out the spliced ​​bottom mold 6 through the gap.

[0046] S12. Inject cleaning water into the pre-embedded ventilation pipe to rinse the floor slab 1, so that the cleaning water carrying the residual sand 5 is discharged through the drain outlet 10.

[0047] In this embodiment, a recycling bin 8 is provided below the drain outlet 10.

[0048] Before injecting cleaning water into the pre-embedded ventilation pipe to rinse the floor slab 1, a sandbag cofferdam 7 is constructed on the floor slab 1. The sandbag cofferdam 7 is located on the side of the drainage outlet 10 away from the main structural beam 2.

[0049] The tiered seating construction method of this invention involves reserving a 25mm diameter circular steel ring embedded part slightly away from the cavity area (a narrow space formed by the back of multiple steps at the lower end of the tiered seating, the main structural beam, and the floor slab) during the construction of the floor slab below the tiered seating. This ring is used for later wire rope pulling and steel pipe positioning. In some embodiments, a winch is installed on the floor slab. When it is necessary to remove the sealing sandbox later, the traction rope is connected to the winch drum. The winch provides power to the sealing sandbox.

[0050] During the construction of the lower floor slab below the stepped slab, a drainage outlet is reserved near the cavity area for later rinsing of residual materials.

[0051] In the cavity area, 48mm diameter round steel pipes are laid vertically and evenly as rollers to reduce frictional resistance when pulling the sealing sand box later.

[0052] An open-top sand box is mounted on a roller to hold sand. One end of the sand box has an inward-opening door for sand (medium or coarse sand) recovery, and the other end has a traction rope (such as a steel wire rope) for later pulling of the sand box.

[0053] Based on the structural dimensions of the upper beams and slabs in the cavity area, sieved sand is poured and laid in the sealing sand box.

[0054] In this embodiment, sand is used as a support to lay the bottom formwork for the stepped slabs and main structural beams. The formwork joints are treated as shown in the diagram to facilitate later formwork removal.

[0055] When tying the reinforcing bars of the step slab, pre-embed ventilation pipes and set plugs at the bottom of the ventilation pipes to facilitate later formwork removal, followed by concrete pouring.

[0056] Once the concrete in the step slab has reached its designed strength, pull the traction rope to remove the sealing sandbox and empty the sand. Then, insert the sealing sandbox back into the cavity area.

[0057] The sealing sandbox was pulled out again to remove any remaining sand from the cavity area. The spliced ​​bottom template was then removed by passing a tamping rod through the pre-installed ventilation pipe and tapping it, and the round steel embedded parts were cut off.

[0058] After the bottom template is removed along with the roller, sandbags are piled up near the cavity area to form a sandbag dike to block water. A high-pressure water gun is used to flush the pre-installed ventilation pipe. A recycling box is installed below the drain outlet, with a screen surrounding the inside of the recycling box for sand recovery. Finally, the drain outlet is sealed.

[0059] The construction method of the stepped seating slab of the present invention involves sealing the gap between the main structural beam and the floor slab using a sealing sandbox, and filling the sealing sandbox with sand to support the bottom formwork of the stepped slab. Rollers are used to reduce the movement resistance of the sealing sandbox in the later stage. The specially constructed sealing sandbox is used to remove the sand remaining on the back of multiple steps at the lower end of the stepped slab. Finally, the bottom formwork of the stepped slab is removed through the reserved ventilation pipe of the stepped slab, and the floor slab is washed with clean water to remove all the residual sand. This method saves the construction period of the stepped slab and reduces construction costs.

[0060] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A method for constructing stepped seating slabs, characterized in that, Includes the following steps: During the construction of the floor slab, a drainage outlet is formed in the floor slab. The drainage outlet is located below the pouring position of the stepped slab and on the side of the main structural beam away from the lower end of the stepped slab. Multiple rollers are laid on the floor slab, and the multiple rollers are arranged along the length direction of the stepped slab; A bottomless sealing sandbox is placed on the multiple rollers. The top elevation of the sealing sandbox is adapted to the bottom elevation of the main structural beam. The sealing sandbox has an open end and a closed end. The closed end seals the gap between the main structural beam and the floor slab. The open end is located below multiple steps at the lower end of the stepped slab. The open end is equipped with an inward-opening door. Sand is poured into the sealing sandbox, and the top of the sand in the sealing sandbox extends to the outside of the sealing sandbox and forms a stepped shape; A spliced ​​bottom mold for laying the stepped slabs on stepped sand; The stepped slab is formed by casting on the spliced ​​bottom mold; The sealing sandbox is pulled out through the gap, and the sand inside the sealing sandbox is poured out, so that the remaining sand is piled on the floor slab. The open end of the empty sealing sand box is inserted under the lower end of the step plate through the gap, so that the remaining sand is poured into the sealing sand box through the open end. The sealing sandbox is then pulled out through the gap again, and the sand inside the sealing sandbox is poured out. The tamping rod is used to tamp the spliced ​​bottom mold through the pre-embedded ventilation pipe of the stepped plate, so that the spliced ​​bottom mold separates from the stepped plate; The spliced ​​bottom mold is removed through the gap; Cleaning water is injected into the pre-embedded ventilation pipe to rinse the floor slab, so that the cleaning water carrying residual sand is discharged through the drain outlet; Before injecting cleaning water into the pre-embedded ventilation pipe to flush the floor slab, a sandbag dike is constructed on the floor slab, the sandbag dike being located on the side of the drainage outlet away from the main structural beam.

2. The construction method for the stepped seating slabs according to claim 1, characterized in that, The closed end is connected to a traction rope, and a winch is installed on the floor slab. The traction rope is connected to the drum of the winch.

3. The construction method for the stepped seating slabs according to claim 1, characterized in that, One side of the inward-opening door is hinged to one side of the opening end, and a limit plate is installed on the other side of the opening end. The other side of the inward-opening door abuts against the side of the limit plate facing the closed end. An elastic reset member is connected between the limit plate and the inward-opening door.

4. The construction method for the stepped seating slab according to claim 3, characterized in that, The elastic reset element is a spring.

5. The construction method for the stepped seating slab according to claim 1, characterized in that, A recycling bin is installed below the drain outlet.

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