CN113718812A - Super-large-area clean room terrace construction method - Google Patents

Abstract

The invention discloses a method for constructing a floor of a clean room with an ultra-large area, which comprises the following steps: s1, erecting a full hall disc buckle type scaffold; s2, laying building templates on the raft; s3, paving and installing SMC formworks, and S4, arranging binding steel bars among the SMC formworks; s5, pouring concrete, and finishing and polishing the poured concrete; and S6, removing the template after the concrete is cured in place. According to the construction method, after the pouring is finished, the surface collecting quality is controlled by adopting the technological processes of rough flattening, leveling, fine flattening and light collecting in sequence, the requirement that the deviation within the range of 2m x 2m is not more than 2mm can be met, the working procedures of later-stage polishing, repairing and the like are built and swept, and the cost and the construction period are saved.

Description

Super-large-area clean room terrace construction method

Technical Field

The invention relates to the technical field of clean room construction, in particular to a method for constructing a floor of a clean room with an ultra-large area.

Background

The electronic industry is a precision machining industry, has higher requirements on a machining environment, generally can build a clean factory building to perform machining production, has the characteristics of large construction pressure in the building process of the clean room, high requirements on ground flatness, sealing, high requirements on cleanliness and the like of the clean room in a high-tech electronic factory building production area, and has the great difficulty in controlling the flatness of the clean room floor because machines for producing display panels and electronic components have extremely high requirements on the ground. The floor base layer of the clean room is divided into two types, one type is a waffle slab, the other type is a common concrete slab, the requirement on the flatness of the concrete surface of the floor base layer of the clean room is extremely strict, and the flatness deviation of the floor base layer of the clean room in the range of 2m multiplied by 2m is not more than 2mm, and the ultra-high precision requirement is met in some cases.

Because the epoxy coating construction is directly carried out on concrete foundation layer upper portion, consequently if adopt traditional construction process construction, will lead to the ground flatness unsatisfied requirement, the later stage need carry out the manual work to the part that exceeds and grind the paper-back, need adopt materials such as epoxy mortar to repair to the part that sinks, to the electronics factory building that the clean room area reaches tens of thousands square meters, will drop into a large amount of manpowers and material resources, increased the cost promptly and also influenced the construction progress.

Disclosure of Invention

The invention aims to overcome the defects and provide the method for constructing the terrace of the clean room with the ultra-large area, which is used for large-area construction of the clean room, meets the requirement of high-standard smoothness, reduces the construction cost and shortens the construction period.

The technical scheme adopted by the invention is as follows:

a method for constructing a floor of a clean room with an ultra-large area comprises the following steps:

s1, erecting a full hall disc buckle type scaffold;

s2, laying building templates on the raft;

s3, laying and installing an SMC mould shell,

s4, arranging binding steel bars among the SMC formworks;

s5, pouring concrete, and finishing and polishing the poured concrete;

and S6, removing the template after the concrete is cured in place.

As a further optimization of the method, in step S1 of the invention, when the plate buckle frame is erected, the level of the top U-shaped bracket is controlled by using an infrared leveling instrument, so as to ensure that all the top U-shaped brackets are located on the designed level line, and after the finished main joist of the digital steel and the fully-paved square keel are paved, the level is adopted for rechecking the second level, and the position which does not meet the requirement is adjusted.

As a further optimization of the method of the present invention, in step S2 of the present invention, a building template is laid first, and after reviewing the elevation of the building template, a reference line is drawn, and the error of the reference line should be less than 2mm, and each axis is used as a control line to prevent the accumulated error from being too large.

As a further optimization of the method, the building template is cleaned before the SMC formwork is installed, and the surface of the building template cannot have any sundries and dust.

5. The floor construction method for the ultra-large area clean room according to claim 4, characterized in that: in step S3, a flat form and a peripheral irregular SMC form are installed at the beam and column position, and then fixed, and then a standard SMC form is laid at another position.

As a further optimization of the method, when the SMC formwork is paved, each construction unit is used as a whole, after paving is finished and the elevation of the bucket opening is checked, the adjacent SMC formworks are connected by self-tapping screws, glue injection sealing is carried out on splicing gaps between the SMC formworks, checking and adjusting are carried out after each construction unit is paved, and accumulated errors are eliminated.

As a further optimization of the method of the present invention, in step S4 of the present invention, when arranging the steel bars, square beams are disposed at intervals on the SMC formwork for temporarily stacking the steel bars, and the main beam steel bars are bundled first, then the secondary beam steel bars in one direction are bundled, the beam steel bars are suspended for binding, the square beams or steel tubes are erected at an overhead position between the SMC formwork, and finally the secondary beam steel bars in the other direction are bundled.

As a further optimization of the method, after the steel bars are bundled and before concrete is poured, the barrel cover of the SMC formwork needs to be adjusted, the result of the primary rechecking is marked on the barrel cover, then the SMC formwork with the deviation is adjusted, and finally rechecking and acceptance check are carried out;

after the barrel cover of the SMC formwork is adjusted, the jacking of the SMC formwork is required to be adjusted.

In step S5, a retarder should be added to the poured concrete, the top surface of the SMC formwork is used as the control basis for the poured concrete, the poured height of the concrete is 3-5mm higher than the top surface of the SMC formwork, the thickness loss of the concrete is determined as the thickness loss of the solid and the bleeding, and a 2m bar is used for leveling the poured concrete as the rough leveling process.

As a further optimization of the method of the present invention, in step S5 of the present invention, after the concrete pouring is completed, the process of trimming and grinding the poured concrete includes:

leveling by using a laser leveling machine, controlling the elevation of a vibrating plate of the leveling machine by using a laser leveling controller in the leveling process, and manually operating in a matching way;

rechecking the elevation by taking a point position every 2 meters by using a concrete laser leveling controller, leveling unqualified point positions by using a scraping bar, and retesting the elevation by using the laser leveling controller after leveling until the retest is qualified;

when the concrete is initially set, polishing by adopting a disc, polishing the surface slurry of the concrete, compacting and leveling the protruded place, wherein the disc is a plastic ruler, and polishing is carried out at least 2-3 times at each place;

adopt artifical receipts light, in order to avoid artifical influence to the concrete surface, the workman stands and uses the claying board to receive light at last on the SMC mould shell.

The invention has the following advantages:

1. the construction method adopts the disc buckle type steel pipe scaffold as a template supporting system, can provide enough strength and rigidity, and reduces deformation caused by self weight of materials;

2. the construction method of the invention needs to carry out elevation retest after each construction process is finished, strictly controls the flatness and reduces the error caused in the construction process of each process;

3. the construction method of the invention adopts the technological processes of rough flattening, leveling, fine flattening and finishing to control the finishing quality after the pouring is finished, can meet the requirement that the deviation in the range of 2m x 2m is not more than 2mm, builds and sweeps the working procedures of polishing, repairing and the like at the later stage, and saves the cost and the construction period.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic process diagram of the process of the present invention;

FIG. 2 is a schematic layout of a beam form;

FIG. 3 is a schematic lay-up of a panel form;

FIG. 4 is a schematic view of a concrete leveling process.

Detailed Description

The present invention is further described in the following with reference to the drawings and the specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention, and the embodiments and the technical features of the embodiments can be combined with each other without conflict.

It is to be understood that the terms first, second, and the like in the description of the embodiments of the invention are used for distinguishing between the descriptions and not necessarily for describing a sequential or chronological order. The "plurality" in the embodiment of the present invention means two or more.

The term "and/or" in the embodiment of the present invention is only an association relationship describing an associated object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, B exists alone, and A and B exist at the same time. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

This embodiment provides a super large area clean room terrace construction method, and the construction process technology is shown in fig. 1, and every process all needs to carry out the elevation and copies the survey adjustment to guarantee the construction requirement that becomes more meticulous to the terrace planarization, it is specific, including following step:

s1, erecting a full hall disc buckle type scaffold;

when the plate buckling frame is erected, the elevation of the top U-shaped support is controlled by adopting an infrared leveling instrument, all the top U-shaped supports are ensured to be positioned on a designed elevation line, secondary elevation rechecking is carried out after the finished H-shaped steel main keel and the fully paved square steel keel are paved, the level instrument is adopted for rechecking the secondary elevation, and the part which does not meet the requirement is adjusted;

s2, laying building templates on the raft;

the main control points of the laying template are as follows: after the building template is laid, the elevation of the building template is rechecked, a datum line is drawn, the error of the datum line is smaller than 2mm, and each axis is used as a control line to prevent overlarge accumulated error.

After the building templates are laid, the building templates are cleaned firstly, so that the surfaces of the building templates cannot have any sundries and deposited dust, the influence on the smoothness of the SMC formwork is avoided, and the pollution to the SMC formwork is avoided;

s3, paving and installing an SMC formwork;

when the SMC formwork is installed, firstly installing a flat plate mould and an SMC formwork with special-shaped periphery at the beam column position, fixing, then laying a standard SMC formwork at other positions, and configuring a special formwork for a beam column head to ensure tight clamping and square joint, and ensuring that the special formworks with the periphery and column head closing-in are installed tightly to ensure no slurry leakage, as shown in figures 2 and 3;

placing SMC formworks according to layout and lofting lines strictly, wherein deviations cannot exist, splicing seams between formworks are aligned, when the SMC formworks are laid, connection along with laying is avoided, so that accumulated errors are larger, each construction unit is used as a whole for laying, after laying is finished and elevation of a barrel opening is checked, self-tapping screws are used for connecting adjacent SMC formworks, glue injection sealing is carried out on splicing seams between the SMC formworks by using silicone adhesive, and checking and adjusting are carried out after each unit is laid, so that the accumulated errors are eliminated;

checking whether a pipe cap of the SMC mould shell is tightly covered, if the pipe cap is loosened, exchanging the pipe cap with surrounding pipes, detecting to know that the matching is tight, and measuring and recording the certificate degree;

also note that:

A. when the template is transported, attention needs to be paid to the fact that the surface cannot be dragged on the building template and cannot be collided;

B. when laying the special-shaped plates, the serial numbers of the special-shaped plates need to be confirmed by contrasting the laying drawings;

c, in order to eliminate the accumulated error of the formwork laying, taking each column net as a metering unit, checking and adjusting after each unit is laid, and ensuring that the accumulated error is eliminated;

s4, arranging binding steel bars among the SMC formworks;

there is a limited consideration of various rebar stacking problems prior to tying the rebar:

piling up the steel bars with the same length: square timbers are placed on an SMC formwork at intervals of 2 groups in the beam direction, the square timbers slowly fall down when the reinforcing steel bars are hung, the reinforcing steel bars are placed along the beam direction, a tower is not dragged when a hook is hung, and two persons are required to lift the reinforcing steel bars when the reinforcing steel bars are moved and placed, and the reinforcing steel bars are not dragged on the SMC formwork;

and (3) stacking stirrups: firstly, building a temporary stacking platform with enough size on an SMC (sheet molding compound) formwork by using square timber or a template, and then hoisting stirrups by using a hopper;

the steel bar bundling requirement is as follows: the reinforcing bar needs the built on stilts ligature of direction, segmentation earlier, and the ligature back of accomplishing the girder reinforcing bar is bound to the girder reinforcing bar, and the secondary beam reinforcing bar of ligature certain direction cuts the roof beam muscle and adopts built on stilts ligature, and built on stilts mode is adopted and is set up flitch or steel pipe between SMC mould shell, and the construction order is: placing stirrups → placing erected timbers → threading iron, binding and fixing → dropping the formwork, binding all the steel bars on the beam in one direction, and then binding the steel bars on the beam in the other direction, wherein the construction sequence comprises the steps of placing stirrups → threading iron, binding and fixing → threading iron and binding and fixing;

after the steel bars are bound, before concrete is poured, the elevation of a barrel cover of the SMC formwork is required to be adjusted to serve as primary rechecking, the rechecking result is recorded on the barrel cover, then 4 persons adjust the SMC formwork with deviation, and finally rechecking and checking are carried out;

after the elevation of the barrel cover is adjusted, the jacking is required to be uniformly checked and adjusted, so that the jacking degree of the peripheral jacking is prevented from being influenced by the adjusted jacking;

s5, pouring concrete, and finishing and polishing the poured concrete;

retarder should be added into the poured concrete, the concrete proportion should be determined through experimental trial, slump test should be carried out before the concrete is poured on site, and pouring is not required when the slump is less than 1600 mm;

when pouring, the pump pipe is arranged on the steel bar surface along the primary and secondary beams, and the bottom of the pump pipe is padded by using the automobile tire, if the pump pipe is required to be arranged along the lattice beam of the waffle slab, the route of the pump pipe needs to be paved by using a batten or a template, then the automobile tire is padded on the pump pipe, and then the pump pipe is arranged; if the spreader is needed, the spreader does not need to be arranged at the crossing position of the primary and secondary beams, and 4 fulcrums at the bottom are respectively arranged on the steel bar surfaces of the primary and secondary beams;

pouring concrete by taking the top surface of the SMC formwork as a control basis, wherein the pouring height of the concrete is 3-5mm higher than that of the SMC formwork, and the concrete is used as the thickness loss of compaction and bleeding, a one-step pouring mode is adopted, vibration is well done, and the concrete is quickly inserted and slowly pulled; the duration of the vibration of the vibrator at each position is based on that the mixture stops sinking and no bubbles are generated and cement mortar is spread out, after the pouring is finished, the elevation of the concrete is immediately met, and rechecking records are made;

rough flattening: the rough leveling is manually operated, leveling is carried out along with pouring, 2m scraping bars are adopted for scraping concrete in the step of pouring, and then wood trowels are used for beating the concrete to remove surface aggregates.

Leveling: leveling by adopting a laser leveling machine, controlling the elevation of a vibrating plate of the leveling machine by using a laser leveling controller in the leveling process, and shoveling redundant concrete on two sides of the vibrating plate to the rear of the leveling machine by manually matching with the leveling machine;

refining: rechecking the elevation by taking a point position every 2 meters by using a concrete laser leveling controller, leveling unqualified point positions by using a scraping bar, and retesting the elevation by using the laser leveling controller after leveling until the retest is qualified;

light receiving: when the concrete is initially set, firstly mechanically polishing, adopting a disc for polishing, polishing the surface slurry of the concrete, compacting and leveling the protruded place, adopting a plastic ruler piece for the disc, and polishing the dead place for at least 2-3 times;

and finally, manually finishing the surface of the concrete, and standing a worker on an SMC (sheet molding compound) formwork to finish the surface by using a plastering plate in order to avoid manual influence on the surface of the concrete.

And S6, after the concrete is cured in place, the template is removed, and people can get on the template 4-6 hours after finishing the finishing of the light collection, and the concrete is cured by sprinkling water.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims (10)

1. The utility model provides a super large area clean room terrace construction method which characterized in that: the method comprises the following steps:

s1, erecting a full hall disc buckle type scaffold;

s2, laying building templates on the raft;

s3, laying and installing an SMC mould shell,

s4, arranging binding steel bars among the SMC formworks;

s5, pouring concrete, and finishing and polishing the poured concrete;

and S6, removing the template after the concrete is cured in place.

2. The ultra-large area silence as claimed in claim 1 is a floor construction method, characterized in that: in step S1, when the plate buckle frame is erected, the level of the top U-shaped bracket is controlled by using an infrared leveling instrument, all the top U-shaped brackets are ensured to be located on the designed level line, and after the finished steel main keel and the fully-paved square steel keel are paved, the level is rechecked by using a level gauge for the second time of level rechecking, and the position which does not meet the requirement is adjusted.

3. The method for constructing a floor of a clean room with an ultra-large area according to claim 1, wherein the method comprises the following steps: in step S2, a building template is laid first, and a reference line is drawn after reviewing the elevation of the building template, and the error of the reference line should be less than 2mm, and each axis is used as a control line to prevent the accumulated error from being too large.

4. The method for constructing a floor of a clean room with an ultra-large area according to claim 3, wherein the method comprises the following steps: before the SMC formwork is installed, the building formwork is cleaned, and the surface of the building formwork cannot have any sundries and dust.

5. The floor construction method for the ultra-large area clean room according to claim 4, characterized in that: in step S3, a flat form and a peripheral irregular SMC form are installed at the beam and column position, and then fixed, and then a standard SMC form is laid at another position.

6. The floor construction method for the ultra-large area clean room according to claim 5, characterized in that: when the SMC formwork is laid, each construction unit is used as a whole, after the laying is finished and the elevation of the bucket opening is checked, self-tapping screws are used for connecting adjacent SMC formworks, glue injection sealing is carried out on splicing gaps among the SMC formworks, checking and adjusting are carried out after each construction unit is laid, and accumulated errors are eliminated.

7. The method for constructing a floor of a clean room with an ultra-large area according to claim 1, wherein the method comprises the following steps: in step S4, when arranging the reinforcing bars, square beams are disposed at intervals on the SMC formwork for temporarily stacking the reinforcing bars, and the main beam reinforcing bars are bound first, then the secondary beam reinforcing bars in one direction are bound, the beam reinforcing bars are bound in a suspended manner, the square beams or the steel tubes are erected at intervals between the SMC formwork, and finally the secondary beam direction is bound in the other direction.

8. The floor construction method for the ultra-large area clean room according to claim 7, characterized in that: after the steel bars are bundled and before concrete is poured, the barrel cover of the SMC formwork is required to be adjusted, a primary rechecking result is marked on the barrel cover, then the SMC formwork with deviation is adjusted, and finally rechecking and acceptance check are carried out;

after the barrel cover of the SMC formwork is adjusted, the jacking of the SMC formwork is required to be adjusted.

9. The method for constructing a floor of a clean room with an ultra-large area according to claim 1, wherein the method comprises the following steps: in step S5, a retarder should be added to the poured concrete, the top surface of the SMC formwork is used as a control basis for the poured concrete, the poured height of the concrete is 3-5mm higher than the top surface of the SMC formwork, the thickness loss of compaction and bleeding is used, and a 2m scraping bar is used for scraping the poured concrete as a rough leveling process.

10. The method for constructing a floor of a clean room with an ultra-large area according to claim 9, wherein the method comprises the following steps: in step S5, after the concrete is poured, the process of finishing and polishing the poured concrete includes:

leveling by using a laser leveling machine, controlling the elevation of a vibrating plate of the leveling machine by using a laser leveling controller in the leveling process, and manually operating in a matching way;

rechecking the elevation by taking a point position every 2 meters by using a concrete laser leveling controller, leveling unqualified point positions by using a scraping bar, and retesting the elevation by using the laser leveling controller after leveling until the retest is qualified;

when the concrete is initially set, polishing by adopting a disc, polishing the surface slurry of the concrete, compacting and leveling the protruded place, wherein the disc is a plastic ruler, and polishing is carried out at least 2-3 times at each place;

adopt artifical receipts light, in order to avoid artifical influence to the concrete surface, the workman stands and uses the claying board to receive light at last on the SMC mould shell.

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