CN110805278A - Method for controlling thickness and flatness of concrete floor - Google Patents

Abstract

The invention relates to a method for controlling the thickness and flatness of a concrete floor. The floor elevation reference control line and the auxiliary control line are marked on a white locating plate, and the white locating plate is bound on a frame column or a shear wall steel bar. The floor elevation reference control line on the positioning plate is consistent with the pre-calibrated vertical positioning elevation of the corresponding floor; the laser digital level is fixed on the top of the horizontal scraper; when the concrete floor is accurately leveled for the last time, the horizontal scraper It is placed on the top of the concrete floor; when the laser light emitted by the laser digital level is coincident with the elevation reference control line on the white positioning plate, the bottom surface height of the horizontal scraper is consistent with the design elevation of the surface of the concrete floor; the invention can achieve economical, It is convenient and effective to control the thickness and flatness of concrete, so that the thickness and flatness of the poured concrete floor can meet the quality standard requirements.

Description

A kind of concrete floor thickness and flatness control method

technical field

The invention relates to the technical field of building construction, in particular to a method for controlling the thickness and flatness of a cast-in-place concrete floor during construction.

Background technique

At present, in the construction process of cast-in-place concrete floor, the control of the thickness and flatness of the concrete floor generally adopts the method of hanging wire and the method of plugging. However, when using the hanging line method, workers often press the line or damage the hanging control line when discharging materials with the pump pipe of the concrete pump truck, resulting in inaccurate or even missing control elevations; in addition, the hanging line method has certain effects on the amount of ash released. However, it is not very effective to control the flatness of floor leveling. When the concrete thickness is checked by the plug-in method, the detection is aimed at a point rather than the entire plane, so the effect of controlling the overall thickness and flatness of the floor slab is not ideal.

At the construction site, in order to protect the already laid steel bars, pipelines, etc., it is generally necessary to reduce the number of people walking on the floor as much as possible; therefore, when pouring the concrete floor, it is not possible to arrange too many people to construct and inspect the floor. . Moreover, when pouring a concrete floor, it is a relatively tense process from unloading to leveling of concrete. In order to complete leveling as soon as possible before the concrete hardens, construction workers sometimes judge whether leveling is based on macroscopic visual inspection. When the quality inspection of the concrete floor is carried out after the concrete floor is formed, it will be found that the surface of the concrete floor is uneven and the thickness is uneven, but it cannot be changed and can only be processed later.

SUMMARY OF THE INVENTION

The invention provides a method for controlling the thickness and flatness of a concrete floor. By adopting an auxiliary positioning device, the purpose of controlling the thickness and flatness of the concrete floor is economical, convenient and effective when pouring the concrete floor, so that the thickness of the poured concrete floor is less than The flatness meets the quality standard requirements.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

A method for controlling the thickness and flatness of a concrete floor, comprising the following steps:

1) Use a white positioning board and a laser digital level as auxiliary positioning devices, and mark the floor elevation reference control line and auxiliary control line on one side of the white positioning board; fix the laser digital level on the top of the horizontal scraper ; Make the laser output direction of the laser digital level parallel to the lower surface of the horizontal scraper;

2) Before pouring the concrete floor, bind the white positioning plate to the frame column or shear wall reinforcement, and lay the white positioning plate along the columns and shear walls around the concrete floor; the floor elevation on the white positioning plate after binding The reference control line is consistent with the pre-calibrated positioning elevation of the corresponding floor in the vertical direction; the positioning elevation is calculated according to the following formula: H = H ₀ +h ₁ +h ₂ ; where H ₀ is the design elevation of the surface of the concrete floor, and h ₁ is The height of the horizontal scraper, h ₂ is the distance between the laser output point of the laser digital level and the upper surface of the horizontal scraper;

3) When the concrete floor is accurately leveled for the last time, place the horizontal scraper on the top of the concrete floor; when the laser light emitted by the laser digital level is coincident with the elevation reference control line on the white positioning plate, the height of the bottom surface of the horizontal scraper Consistent with the design elevation of the surface of the concrete floor; according to the height of the bottom surface of the horizontal scraper, the concrete floor is calendered and leveled with a trowel, so as to precisely control the thickness and flatness of the concrete floor.

The white positioning plate is made of white color coated plate, the width is more than 50mm, and the thickness is 0.5-3mm.

The material of the horizontal scraper is aluminum alloy.

One end of the laser digital level is the laser emission end, or both ends are the laser emission end, and the laser emission distance is at least 5m.

One of the laser digital level is arranged in the middle of the horizontal scraper, or one is arranged at both ends of the horizontal scraper.

The horizontal scraper is replaced by a ruler or a spirit level.

Compared with the prior art, the beneficial effects of the present invention are:

1) The auxiliary positioning device used is simple to manufacture, low cost and easy to operate, and the on-site workers can master the application well, and can achieve the purpose of economical, convenient and effective control of concrete thickness and flatness.

2) The method of the present invention will not affect the concrete pouring speed, has strong applicability, and can be widely used in the construction of concrete slab pouring in construction projects.

3) It can effectively control the thickness and flatness of the floor slab, so that the thickness and flatness of the poured concrete floor slab can meet the quality standard requirements, which is conducive to the control of the floor height of the building and improves the construction quality of the project.

4) When plastering and leveling, the thickness and flatness of the floor slab can be accurately controlled to meet the requirements of design and construction specifications. Leveling treatment is not required when the floor is constructed in the later stage, which saves the fine stone concrete or cement mortar used for floor leveling. Labor costs, reduce waste of resources, and help control construction costs.

Description of drawings

FIG. 1 is a schematic diagram of the principle of a method for controlling the thickness and flatness of a concrete floor according to the present invention.

In the picture: 1. Concrete floor 2. Frame column or shear wall reinforcement 3. White positioning plate 4. Horizontal scraper 5. Laser digital level

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

As shown in Figure 1, a method for controlling the thickness and flatness of a concrete floor according to the present invention includes the following steps:

1) Use the white positioning plate 3 and the laser digital level 5 as auxiliary positioning devices, and mark the floor elevation reference control line and the auxiliary control line on one side of the white positioning plate 3; fix the laser digital level 5 at the level the top of the scraper 4; and make the laser output direction of the laser digital level 5 be parallel to the lower surface of the horizontal scraper 4;

2) Before pouring the concrete floor 2, the white positioning plate 3 is bound on the frame column or the shear wall steel bar 2, and the white positioning plate 3 is arranged along the entire length of the column and the shear wall around the concrete floor 1; The floor elevation reference control line on slab 3 is consistent with the pre-calibrated positioning elevation of the corresponding floor in the vertical direction; the positioning elevation is calculated according to the following formula: H=H ₀ +h ₁ +h ₂ ; where H ₀ is the surface of the concrete floor Design elevation, _h1 is the height of the horizontal scraper, _h2 is the distance from the laser output point of the laser digital level to the upper surface of the horizontal scraper;

3) When the concrete floor 1 is accurately leveled for the last time, place the horizontal scraper 4 on the top of the concrete floor 1; when the laser light emitted by the laser digital level 5 coincides with the elevation reference control line on the white positioning plate 3, the The height of the bottom surface of the scraper 4 is consistent with the design elevation of the upper surface of the concrete floor 1; according to the height of the bottom surface of the horizontal scraper 4, use a trowel to calender and level the concrete floor 1, so as to precisely control the thickness and flatness of the concrete floor 1.

The white positioning plate 3 is made of a white color-coated plate, with a width of more than 50 mm and a thickness of 0.5-3 mm.

The material of the horizontal scraper 4 is aluminum alloy.

One end of the laser digital level 5 is a laser emission end, or both ends are laser emission ends, and the laser emission distance is at least 5m.

One of the laser digital level 5 is arranged in the middle of the horizontal scraper 4 , or one is arranged at both ends of the horizontal scraper 4 .

The horizontal scraper 4 is replaced by a ruler or a level.

The following examples are implemented on the premise of the technical solutions of the present invention, and provide detailed embodiments and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

【Example】

In the present embodiment, a method for controlling the thickness and flatness of concrete floor slabs is as follows:

1. Cut out 0.5mm thick and 50mm wide white color coated slats, and draw the floor elevation reference control line and auxiliary control line on it, namely 0 line, +5mm line, -5mm line. Before pouring the concrete floor, the surveying and laying staff will locate the elevation according to the vertical direction of the floor, and bind the white-painted slats to the frame columns or shear wall steel bars as the elevation control line when pouring the concrete floor.

2. Fix 2 laser digital level (each with a length of 200mm) that emit laser at one end on the top ends of the 2m long aluminum alloy horizontal scraper with strong magnetic stickers, and make the two laser level The directions of laser light emission are respectively towards the outer end of the aluminum alloy horizontal scraper.

3. When the concrete floor is poured, the elevation datum control line on the white-coated slab slats set around is used to guide the amount of concrete unloading, which is beneficial to the initial leveling by scratching.

4. When the concrete floor is accurately leveled for the last time, the construction workers place the aluminum alloy horizontal scraper (or a ruler or a level) on the concrete floor. When the laser emitted by the laser digital level is coincident with the elevation reference control line on the white-painted slats, the bottom surface adjustment of the aluminum alloy horizontal scraper is the design elevation of the upper surface of the floor. When the worker uses a trowel to level the surface, he can use the bottom surface of the aluminum alloy scraper to accurately control the thickness and flatness of the floor.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (6)

1. A method for controlling the thickness and the flatness of a concrete floor is characterized by comprising the following steps:

1) a white positioning plate and a laser digital display horizontal ruler are used as auxiliary positioning devices, and a floor slab elevation reference control line and an auxiliary control line are scribed on the surface of one side of the white positioning plate; fixing a laser digital display horizontal ruler at the top of the horizontal scraping bar; the laser emitting direction of the laser digital display horizontal ruler is parallel to the lower surface of the horizontal scraping bar;

2) binding a white positioning plate on a frame column or a shear wall steel bar before pouring the concrete floor slab, and arranging the white positioning plate along the columns on the periphery of the concrete floor slab and the entire length of the shear wall; the floor elevation reference control line on the bound white positioning plate is consistent with the pre-calibrated positioning elevation in the vertical direction of the corresponding floor; the positioning elevation is calculated according to the following formula: h ═ H₀+h₁+h₂(ii) a In the formula H₀Designing elevation h for upper surface of concrete floor₁Is the height of the horizontal scraping bar, h₂The distance between a laser emergent point of the laser digital display horizontal ruler and the upper surface of the horizontal scraping ruler is shown;

3) when the concrete floor is accurately leveled for the last time, the horizontal scraping bar is placed at the top of the concrete floor; when laser light emitted by the laser digital display leveling ruler coincides with an elevation reference control line on the white positioning plate, the height of the bottom surface of the horizontal scraping bar is consistent with the designed elevation of the upper surface of the concrete floor; and (4) leveling the concrete floor slab by using a trowel to press and polish according to the height of the bottom surface of the horizontal scraping bar, so that the thickness and the flatness of the concrete floor slab are accurately controlled.

2. The method for controlling the thickness and the flatness of the concrete floor according to claim 1, wherein the white positioning plate is made of white color-coated plates, the width of the white positioning plate is more than 50mm, and the thickness of the white positioning plate is 0.5-3 mm.

3. The method as claimed in claim 1, wherein the horizontal scraping bar is made of aluminum alloy.

4. The method for controlling the thickness and the flatness of the concrete floor according to claim 1, wherein one end of the laser digital display level bar is a laser emitting end, or both ends of the laser digital display level bar are laser emitting ends, and the laser emitting distance is at least 5 m.

5. The method for controlling the thickness and the flatness of the concrete floor according to claim 1, wherein 1 laser digital display leveling instrument is arranged in the middle of the horizontal scraping bar, or 1 laser digital display leveling instrument is respectively arranged at two ends of the horizontal scraping bar.

6. A method as claimed in claim 1 or 5, wherein the horizontal scraping bar is replaced by a guiding rule or a level.

Images