Hollow floor clean floor construction method and self-supporting box structure

Abstract

The present application relates to the technical field of hollow floor, in particular to a clean floor construction method of hollow floor and a self-supporting box structure, which comprises the following steps: S1, erecting a support and installing a formwork; S2, installing a self-supporting box support frame; S3, placing the self-supporting box; and S4, fixing the self-supporting box.The self-supporting box structure comprises a shell, the shell comprises an upper shell and a lower shell, and a threaded column is arranged inside the lower shell.A mounting plate is sleeved on the threaded column, a support column is arranged at the lower end surface of the mounting plate, an adjusting mechanism is arranged at the upper end surface of the mounting plate, and the adjusting mechanism is used for adjusting the axial movement of the mounting plate along the threaded column.The self-supporting box core mold can be prevented from floating up during the pouring of concrete, and the engineering quality effect is ensured.

Description

Technical Field

[0001] This invention relates to the field of hollow core slab technology, and more specifically, to a method for constructing cleanroom floors using hollow core slabs and a self-supporting box structure. Background Technology

[0002] Currently, self-supporting box core molds are commonly used in the construction of hollow core slabs. Due to their light weight, these core molds generate significant buoyancy during the pouring of flowing concrete, causing them to float and transfer this buoyancy to the slab reinforcement. If effective anti-buoyancy positioning measures are not taken for the self-supporting box, the slab reinforcement and the self-supporting box are prone to misalignment, resulting in deviations in the concrete cover of the reinforcement exceeding the specifications. Consequently, the concrete below the self-supporting box is difficult to compact, seriously affecting the quality of the project. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a method for constructing cleanroom floors with hollow core slabs and a self-supporting box structure. This method solves the problem of the self-supporting box core mold floating during concrete pouring, thus preventing it from floating and ensuring the quality of the project.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] A method for constructing a cleanroom floor using a hollow core slab includes the following steps.

[0006] S1. Scaffolding erection and formwork installation

[0007] A steel reinforcement frame is erected on the building structure. Then, a base plate is laid on top of the steel reinforcement frame. Multiple baffles are then set up along the edge of the base plate. The baffles are connected end to end in sequence to form a template together with the base plate.

[0008] S2, Installation of self-supporting box frame

[0009] A steel mesh is laid on the base plate, and a steel cage is erected along the length of the baffle. The steel cages are connected end to end to form a frame beam, and the frame beam is tied to the steel mesh laid on the base plate. Multiple steel cages are arranged at intervals along the length of the baffle inside the frame beam. The steel cages inside the frame beam are arranged longitudinally and transversely to form rib beams. The frame beam and the rib beams together enclose the installation area for storing the self-supporting box.

[0010] S3, Place the self-supporting box

[0011] The self-supporting box is hoisted into the installation area, and the distance between the bottom of the self-supporting box and the base plate is adjusted by the self-supporting box structure.

[0012] S4, Self-supporting box fixing

[0013] Anti-buoyancy reinforcement bars are placed at the top of the installation section. The anti-buoyancy reinforcement bars are arranged along the length of the steel cage. The anti-buoyancy reinforcement bars are arranged in a longitudinal and transverse manner to form an anti-buoyancy net that is pressed down on the top of the self-supporting box. Then, iron wires are arranged around the circumference of the self-supporting box. One end of the iron wire is connected to the anti-buoyancy net, and the other end passes through the bottom plate and is connected to the steel reinforcement support at the bottom of the bottom plate.

[0014] With this invention, when construction workers are pouring concrete, the concrete will cause the self-supporting box to float, but the anti-buoyancy reinforcement at the top of the self-supporting box will block it from floating, thus preventing the self-supporting box from floating. This effectively prevents the core mold of the self-supporting box from floating during concrete pouring and ensures the quality of the project.

[0015] Preferably, in step S4, the anti-buoyancy reinforcement is pressed down at the central axis of the self-supporting box.

[0016] With this invention, the anti-buoyancy reinforcement is pressed down at the center of the self-supporting box, thereby preventing the self-supporting box from shifting due to uneven force when it floats.

[0017] Preferably, in step S4, the spacing between the wire fixing points on the anti-buoyancy ribs at the top of the self-supporting box is less than 1.1 meters.

[0018] With this invention, when construction workers tie iron wires around the self-supporting box, the distance between each binding point of the iron wire is less than 1.1 meters, thereby preventing the large gap between adjacent iron wires from causing the self-supporting box to become unstable.

[0019] Preferably, in step S4, the distance between the self-supporting box and the frame beam or rib beam is greater than 50 mm.

[0020] This invention prevents insufficient compaction between the self-supporting box and the frame beam or rib beam during concrete pouring, thus avoiding impact on the quality of the project after construction.

[0021] Preferably, after step S4 is completed, an elevated walkway is laid on the anti-buoyancy net.

[0022] With this invention, an elevated walkway is laid before the installation of the self-supporting box and the pouring of concrete to prevent construction workers from directly stepping on the self-supporting box during the construction process.

[0023] Preferably, after the elevated walkway is laid, concrete is pumped into the formwork, and the concrete drop is kept between 15 and 18 cm.

[0024] Through this invention, the thickness of the concrete being pumped is strictly controlled to prevent excessive load on the self-supporting box, which could cause the top of the box to sink. At the same time, the concrete is poured in layers, and each layer must be vibrated to ensure compaction and prevent voids. In addition, the vibrator must not continuously touch the self-supporting box during vibration to prevent the box from shifting or being damaged.

[0025] After the concrete is poured, construction workers will compact the surface layer after the initial setting, and water it for curing after the final setting.

[0026] When pouring hollow floor slabs, first use a vibrator to compact them. After compaction, use a plate vibrator to compact and level the surface to the design elevation. Before initial setting, use a hand-held concrete trowel to smooth and finish the surface. After initial setting and before final setting, use a ride-on double-disc trowel for fine leveling.

[0027] A self-supporting box structure is applied in the construction method of clean flooring for hollow core slabs. The self-supporting box structure includes a shell, which includes an upper shell and a lower shell. The lower shell has a threaded column arranged along the height direction of the lower shell. An installation plate is fitted on the threaded column. A support column passing through the bottom end face of the lower shell is provided at the lower end face of the installation plate. An adjustment mechanism that cooperates with the threaded column is provided at the upper end face of the installation plate. The adjustment mechanism is used to adjust the axial movement of the installation plate along the threaded column.

[0028] With this invention, before hoisting the self-supporting box, construction workers can adjust the length of the support column at the lower end of the lower shell through the adjustment mechanism, so as to maintain a certain distance between the self-supporting box and the bottom plate, and adjust the appropriate height according to the project needs, thereby ensuring that there is a suitable height between the self-supporting box and the bottom plate, which facilitates the subsequent filling of concrete and improves the quality of the project.

[0029] After the construction workers adjusted the extension length of the support column, the upper shell was placed on top of the lower shell. Then, the upper and lower shells were connected by bolts through the first through hole at the connection between the upper and lower shells. Finally, the hoisting rope of the crane was passed through the second through hole at the connection between the upper and lower shells to lift the self-supporting box into the installation area.

[0030] Preferably, the adjusting mechanism includes a first sleeve connected to the mounting plate and fitted onto the threaded post; the inner sidewall of the upper end of the first sleeve expands inward in the circumferential direction to form a first flange; a second sleeve is provided at the upper end of the first sleeve, extending into the first sleeve, and the outer sidewall of the end of the second sleeve extending into the first sleeve expands outward in the circumferential direction to form a second flange; the inner sidewall of the second sleeve is provided with an internal thread that mates with the threaded post; and a third flange is provided at the end of the second sleeve away from the second flange.

[0031] With this invention, construction workers can rotate the second sleeve to move it along the threaded column axis. The movement of the second sleeve causes the first sleeve and the mounting plate to move. The movement of the mounting plate causes the support column at its lower end to move through the third through hole on the bottom end face of the lower housing. This makes it easier for construction workers to adjust the extension and retraction length of the support column.

[0032] Preferably, the lower housing has a guide rod arranged along the height direction of the lower housing; the mounting plate has a guide hole for the guide rod to pass through.

[0033] With this invention, the mounting plate moves along the guide rod, thereby significantly improving the stability of the mounting plate during movement.

[0034] Preferably, the threaded column has a plane along the length of the threaded column, and the plane has scale lines; the lower end of the support column has a fourth flange.

[0035] With this invention, construction workers can ensure that the height between each self-supporting box and the base plate is consistent by using the scale lines, thereby improving the quality of the project after construction; the fourth flange increases the contact area between the support column and the base plate, making the self-supporting box more stable when parked. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the housing in Example 1.

[0037] Figure 2 This is a schematic diagram of the internal structure of the lower shell in Example 1.

[0038] Figure 3 This is a schematic diagram of the threaded column in Example 1.

[0039] Figure 4 This is a schematic diagram of the scale lines in Example 1.

[0040] Figure 5 This is a schematic diagram of the adjustment mechanism in Example 1.

[0041] Figure 6 This is a cross-sectional view of the lower shell structure in Example 1.

[0042] Figure 7 This is a schematic diagram of the first flange and the second flange in Example 1. Detailed Implementation

[0043] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0044] Example 1

[0045] This embodiment provides a method for constructing a cleanroom floor using a hollow core slab, which includes the following steps.

[0046] S1. Scaffolding erection and formwork installation

[0047] A steel reinforcement frame is erected on the building structure. Then, a base plate is laid on top of the steel reinforcement frame. Multiple baffles are then set up along the edge of the base plate. The baffles are connected end to end in sequence to form a template together with the base plate.

[0048] S2, Installation of self-supporting box frame

[0049] A steel mesh is laid on the base plate, and a steel cage is erected along the length of the baffle. The steel cages are connected end to end to form a frame beam, and the frame beam is tied to the steel mesh laid on the base plate. Multiple steel cages are arranged at intervals along the length of the baffle inside the frame beam. The steel cages inside the frame beam are arranged longitudinally and transversely to form rib beams. The frame beam and the rib beams together enclose the installation area for storing the self-supporting box.

[0050] S3, Place the self-supporting box

[0051] The self-supporting box is hoisted into the installation area, and the distance between the bottom of the self-supporting box and the base plate is adjusted by the self-supporting box structure.

[0052] S4, Self-supporting box fixing

[0053] Anti-buoyancy reinforcement bars are placed at the top of the installation section. The anti-buoyancy reinforcement bars are arranged along the length of the steel cage. The anti-buoyancy reinforcement bars are arranged in a longitudinal and transverse manner to form an anti-buoyancy net that is pressed down on the top of the self-supporting box. Then, iron wires are arranged around the circumference of the self-supporting box. One end of the iron wire is connected to the anti-buoyancy net, and the other end passes through the bottom plate and is connected to the steel reinforcement support at the bottom of the bottom plate.

[0054] In this embodiment, when the concrete is poured, the self-supporting box will float upwards due to the concrete, but this will be blocked by the anti-buoyancy reinforcement at the top of the self-supporting box, thus preventing the self-supporting box from floating upwards. This effectively prevents the core mold of the self-supporting box from floating upwards during concrete pouring and ensures the quality of the project.

[0055] In this embodiment, in step S4, the anti-buoyancy reinforcement is pressed down on the central axis of the self-supporting box.

[0056] In this embodiment, the anti-buoyancy reinforcement is pressed down at the center of the self-supporting box, thereby preventing the self-supporting box from shifting due to uneven force when it floats.

[0057] In this embodiment, in step S4, the spacing between the wire fixing points on the anti-buoyancy ribs at the top of the self-supporting box is less than 1.1 meters.

[0058] In this embodiment, when construction workers tie wires around the self-supporting box, the distance between each wire tying point is less than 1.1 meters, thereby preventing the large gap between adjacent wires from causing the self-supporting box to become unstable.

[0059] In this embodiment, in step S4, the distance between the self-supporting box and the frame beam or rib beam is greater than 50 mm.

[0060] This embodiment prevents insufficient compaction between the self-supporting box and the frame beam or rib beam during concrete pouring, which could affect the quality of the project after construction.

[0061] In this embodiment, after step S4 is completed, an elevated walkway is laid on the anti-buoyancy net.

[0062] In this embodiment, an elevated walkway is laid before the self-supporting box is installed and the concrete is poured to prevent construction workers from directly stepping on the self-supporting box during the construction process.

[0063] In this embodiment, after the elevated walkway is laid, concrete is pumped into the formwork, and the concrete drop is kept between 15 and 18 cm.

[0064] In this embodiment, when pumping concrete, the thickness of the concrete pour is strictly controlled to prevent excessive load on the self-supporting box, which could cause the top of the self-supporting box to sink. At the same time, the concrete is poured in layers, and each layer must be vibrated to ensure compaction and prevent voids. In addition, the vibrator must not continuously touch the self-supporting box during vibration to prevent the self-supporting box from shifting or being damaged.

[0065] After the concrete is poured, construction workers will compact the surface layer after the initial setting, and water it for curing after the final setting.

[0066] When pouring hollow floor slabs, first use a vibrator to compact them. After compaction, use a plate vibrator to compact and level the surface to the design elevation. Before initial setting, use a hand-held concrete trowel to smooth and finish the surface. After initial setting and before final setting, use a ride-on double-disc trowel for fine leveling.

[0067] Example 2

[0068] like Figure 1-7 As shown, a self-supporting box structure is applied in the construction method of clean flooring for hollow core slabs. The self-supporting box structure includes a shell 100, which includes an upper shell 110 and a lower shell 120. The lower shell 120 is provided with a threaded column 230 arranged along the height direction of the lower shell 120. An installation plate 550 is fitted on the threaded column 230. A support column 560 passing through the bottom end face of the lower shell 120 is provided at the lower end face of the installation plate 550. An adjustment mechanism that cooperates with the threaded column 230 is provided at the upper end face of the installation plate 550. The adjustment mechanism is used to adjust the axial movement of the installation plate 550 along the threaded column 230.

[0069] In this embodiment, before hoisting the self-supporting box, the construction personnel adjust the length of the support column 560 at the lower end of the lower shell 120 through the adjustment mechanism, so as to maintain a certain distance between the self-supporting box and the bottom plate, and adjust the appropriate height according to the project needs, thereby ensuring that there is a suitable height between the self-supporting box and the bottom plate, which facilitates the subsequent filling of concrete and improves the quality of the project.

[0070] After the construction workers adjusted the extension length of the support column 560, the upper shell 110 was placed on top of the lower shell 120. Then, the upper shell 110 and the lower shell 120 were connected by bolts through the first through hole 210 at the connection between the upper shell 110 and the lower shell 120. Finally, the hoisting rope of the crane was passed through the second through hole 240 at the connection between the upper shell 110 and the lower shell 120 to hoist the self-supporting box into the installation area.

[0071] In this embodiment, the adjustment mechanism includes a first sleeve 530 connected to the mounting plate 550 and fitted onto the threaded post 230; the inner sidewall of the upper end of the first sleeve 530 expands inward in the circumferential direction to form a first flange 610; a second sleeve 510 extending into the first sleeve 530 is provided at the upper end of the first sleeve 530, and the outer sidewall of the end of the second sleeve 510 extending into the first sleeve 530 expands outward in the circumferential direction to form a second flange 620; the inner sidewall of the second sleeve 510 is provided with an internal thread that mates with the threaded post 230; and a third flange 520 is provided at the end of the second sleeve 510 away from the second flange 620.

[0072] In this embodiment, the construction personnel can rotate the second sleeve 510 to move the second sleeve 510 along the axial direction of the threaded column 230. The movement of the second sleeve 510 causes the first sleeve 530 and the mounting plate 550 to move. The movement of the mounting plate 550 causes the support column 560 at its lower end to move through the third through hole 310 on the bottom end face of the lower housing 120. This makes it easier for the construction personnel to adjust the extension length of the support column 560.

[0073] In this embodiment, a guide rod 220 is provided inside the lower housing 120 along the height direction of the lower housing 120; a guide hole 540 is provided on the mounting plate 550 for the guide rod 220 to pass through.

[0074] In this embodiment, the mounting plate 550 moves along the guide rod 220, thereby improving the stability of the mounting plate 550 during movement.

[0075] In this embodiment, the threaded post 230 is provided with a plane 410 along the length of the threaded post 230, and a scale line 420 is provided at the plane 410; the lower end of the support post 560 is provided with a fourth flange 570.

[0076] In this embodiment, construction workers can ensure that the height between each self-supporting box and the base plate is consistent by using the scale line 420, thereby improving the quality of the project after construction; the fourth flange 570 increases the contact area between the support column 560 and the base plate, making the self-supporting box more stable when parked.

[0077] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. A method for constructing a clean floor using hollow core slabs, characterized in that... The method includes the following steps: S1. Scaffolding erection and formwork installation A steel reinforcement frame is erected on the building structure. Then, a base plate is laid on top of the steel reinforcement frame. Multiple baffles are then set up along the edge of the base plate. The baffles are connected end to end in sequence to form a template together with the base plate. S2, Installation of self-supporting box frame A steel mesh is laid on the base plate, and a steel cage is erected along the length of the baffle. The steel cages are connected end to end to form a frame beam, and the frame beam is tied to the steel mesh laid on the base plate. Multiple steel cages are arranged at intervals along the length of the baffle inside the frame beam. The steel cages inside the frame beam are arranged longitudinally and transversely to form rib beams. The frame beam and the rib beams together enclose the installation area for storing the self-supporting box. S3, Place the self-supporting box The self-supporting box is hoisted into the installation area, and the distance between the bottom of the self-supporting box and the base plate is adjusted by the self-supporting box structure; The self-supporting box structure includes a shell (100), which includes an upper shell (110) and a lower shell (120). The lower shell (120) is characterized in that: a threaded column (230) is provided inside the lower shell (120) along the height direction of the lower shell (120); an installation plate (550) is fitted on the threaded column (230); a support column (560) is provided at the lower end face of the installation plate (550) and passes through the bottom end face of the lower shell (120); an adjustment mechanism is provided at the upper end face of the installation plate (550) to cooperate with the threaded column (230), and the adjustment mechanism is used to adjust the installation plate (550) to move axially along the threaded column (230); The adjustment mechanism includes a first sleeve (530) connected to the mounting plate (550) and fitted onto the threaded post (230); the inner sidewall of the upper end of the first sleeve (530) expands inward in the circumferential direction to form a first flange (610); the upper end of the first sleeve (530) is provided with a second sleeve (510) extending into the first sleeve (530), and the outer sidewall of the end of the second sleeve (510) extending into the first sleeve (530) expands outward in the circumferential direction to form a second flange (620); the inner sidewall of the second sleeve (510) is provided with an internal thread that mates with the threaded post (230); the end of the second sleeve (510) away from the second flange (620) is provided with a third flange (520). By rotating the second sleeve (510), the second sleeve (510) can be moved axially along the threaded column (230), thereby adjusting the extension length of the support column (560). S4, Self-supporting box fixing Anti-buoyancy reinforcement bars are placed at the top of the installation section. The anti-buoyancy reinforcement bars are arranged along the length of the steel cage. The anti-buoyancy reinforcement bars are arranged in a longitudinal and transverse manner to form an anti-buoyancy net that is pressed down on the top of the self-supporting box. Then, iron wires are arranged around the circumference of the self-supporting box. One end of the iron wire is connected to the anti-buoyancy net, and the other end passes through the bottom plate and is connected to the steel reinforcement support at the bottom of the bottom plate.

2. The method for constructing a clean floor with a hollow core slab according to claim 1, characterized in that: In step S4, the anti-buoyancy reinforcement is pressed down on the central axis of the self-supporting box.

3. The method for constructing a clean floor with a hollow core slab according to claim 1, characterized in that: In step S4, the spacing between the wire fixing points on the anti-buoyancy reinforcement at the top of the self-supporting box is less than 1.1 meters.

4. The method for constructing a clean floor with a hollow core slab according to claim 1, characterized in that: In step S4, the distance between the self-supporting box and the frame beam or rib beam is greater than 50 mm.

5. The method for constructing a clean floor with a hollow core slab according to claim 1, characterized in that: After step S4 is completed, an elevated walkway is laid on the anti-buoyancy net.

6. The method for constructing a clean floor with a hollow core slab according to claim 5, characterized in that: After the elevated walkway is laid, concrete is pumped into the formwork, and the concrete drop is kept between 15 and 18 cm.

7. A self-supporting box structure, comprising a shell (100), the shell (100) comprising an upper shell (110) and a lower shell (120), characterized in that: The lower housing (120) is provided with a threaded post (230) arranged along the height direction of the lower housing (120); a mounting plate (550) is fitted on the threaded post (230), and a support post (560) passing through the bottom end face of the lower housing (120) is provided at the lower end face of the mounting plate (550); an adjustment mechanism that cooperates with the threaded post (230) is provided at the upper end face of the mounting plate (550), and the adjustment mechanism is used to adjust the axial movement of the mounting plate (550) along the threaded post (230); The adjustment mechanism includes a first sleeve (530) connected to the mounting plate (550) and fitted onto the threaded post (230); the inner sidewall of the upper end of the first sleeve (530) expands inward in the circumferential direction to form a first flange (610); the upper end of the first sleeve (530) is provided with a second sleeve (510) extending into the first sleeve (530), and the outer sidewall of the end of the second sleeve (510) extending into the first sleeve (530) expands outward in the circumferential direction to form a second flange (620); the inner sidewall of the second sleeve (510) is provided with an internal thread that mates with the threaded post (230); the end of the second sleeve (510) away from the second flange (620) is provided with a third flange (520).

8. A self-supporting box structure according to claim 7, characterized in that: The lower housing (120) is provided with a guide rod (220) arranged along the height direction of the lower housing (120); the mounting plate (550) is provided with a guide hole (540) for the guide rod (220) to pass through.

9. A self-supporting box structure according to claim 7, characterized in that: The threaded column (230) has a plane (410) arranged along the length of the threaded column (230), and a scale line (420) is provided at the plane (410); the lower end of the support column (560) is provided with a fourth flange (570).

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