CN114412186A - Precision control tool for improving flatness of cast-in-place plate and leveling method - Google Patents
Precision control tool for improving flatness of cast-in-place plate and leveling method Download PDFInfo
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- CN114412186A CN114412186A CN202210154490.5A CN202210154490A CN114412186A CN 114412186 A CN114412186 A CN 114412186A CN 202210154490 A CN202210154490 A CN 202210154490A CN 114412186 A CN114412186 A CN 114412186A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/10—Devices for levelling, e.g. templates or boards
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/306—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces for measuring evenness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses a precision control tool and a leveling method for improving the flatness of a cast-in-place slab, wherein the precision control tool comprises an infrared level meter and a precision leveling tool; the fine smoothing tool comprises a smoothing board and a grab handle; the trowelling plate is a bending plate, the inner concave surface of the bending plate is used for trowelling, and the outer convex surface is used for installing the grab handle; a target plate for receiving a datum line is vertically arranged on the outer convex surface; a connecting part is arranged between the outer convex surface and the grab handle, one end of the connecting part is movably connected on the outer convex surface, and the other end is fixedly connected with the grab handle; an adjusting support part used for limiting the rotation angle of the bending plate is arranged at the connecting position of the grab handle and the connecting part, and the adjusting support part can be abutted on the outer convex surface or the target plate along with the angle change of the grab handle and the wiping plate. Through the design, the adjusting support part can be abutted against the outer convex surface of the wiping plate or the structural design of the target plate along with the angle change of the grab handle and the wiping plate, so that the adjusting support part has a direction adjusting function, and the leveling operation of forward pushing and backward moving of the wiping tool can be better completed.
Description
Technical Field
The invention relates to the technical field of pouring construction of reinforced concrete cast-in-place plates, in particular to a precise control tool and a leveling method for improving the flatness of a cast-in-place plate.
Background
The cast-in-place structure should not influence the dimensional deviation of structural performance or service function, especially in cast-in-place floor slab concrete construction process, the thick control of board is very important, relates to concrete structure safety, and the performance such as bearing capacity, durability of structure are related to, are the important detection index of structure entity position and dimensional deviation inspection.
Too thick board can increase floor load and influence decorative structure layer construction, and too thin then causes the floor bearing capacity not enough, leads to the structural quality defect. In the construction of a conventional structure, the thickness of a cast-in-place plate is realized by controlling the elevation of a bottom die, the elevation of a plate top and the flatness of a plate surface, and the position, the size deviation and the inspection method of the cast-in-place structure are determined by the acceptance criteria of the construction quality of concrete structure engineering (GB50204-2015)8.3.2 and the appendix F, wherein the size deviation and the inspection method of the cast-in-place plate are shown in the table 1.
TABLE 1 cast-in-situ board size deviation and inspection method
In actual construction on site, elevation guiding measurement or point-by-point leveling method is adopted for the bottom die elevation of the cast-in-place slab, the design and specification requirements are basically met, but the control measures for the slab top elevation and the slab surface flatness are various, and the method mainly comprises the following steps:
(1) a lead return method: binding vertical steel bars of columns and walls, copying and measuring +500 horizontal elevation control points on the vertical steel bars at regular intervals, pulling through lines through the elevation control points during concrete pouring, and determining the elevation of the top of the slab by using a lower return measuring scale of a steel rule; the method has the defects of poor levelness of the wire, multiple artificial influence factors and difficulty in ensuring the precision.
(2) A steel bar positioning method: utilizing phi 6 short steel bars, vertically welding the phi 6 short steel bars on longitudinal and transverse steel bar meshes of a cast-in-place slab at intervals of 2 meters, extending out of the floor by 50mm, measuring and setting elevation on the short steel bars, marking the short steel bars by using red adhesive tapes, and setting the elevation of the slab top at the lower edges of the adhesive tapes as the basis for leveling the slab surface during concrete pouring; the disadvantages of the method are that the operation process and the working hour consumption are increased, the input amount of the steel bar is large, and the cost is relatively high.
(3) A horse stool shaping method: the finished split heads made of fine stone concrete are provided with grooves at the upper and lower parts, the height is the same as the thickness of the plate, the split heads are arranged between upper and lower layers of reinforcing steel bars of a cast-in-place plate, the upper and lower layers of reinforcing steel bars of the plate are respectively placed in the upper and lower grooves of the split heads, and the top of the split heads is used as the foundation for cast-in-place plate concrete pouring and leveling; the split heads have the disadvantages that the strength of split heads concrete is generally difficult to meet the requirement, and the split heads are easy to displace and break under the action of load; the split heads are easy to laterally topple when used for only configuring cast-in-place plates of lower-layer steel bars; the split heads are disposable and have higher cost.
(4) The prefabricated embedded part method comprises the following steps: utilizing embedded parts such as phi 50mm PVC pipes, cylindrical concrete prefabricated blocks or finished plastic cylinders and the like to be bound on the plate ribs or fixed on the plate bottom die by iron nails, arranging in a quincunx shape, and taking the height of the embedded parts as the basis of concrete pouring and leveling of the cast-in-place plate, wherein the embedded parts are as thick as the plate; the PVC pipe and the plastic product have the disadvantages of low pressure bearing capacity, difficulty in vibrating and compacting concrete at the distribution position, weak strength, poor adhesion with the concrete and leakage hidden trouble; the strength of the concrete precast block is not easy to guarantee, the precast installation wastes time and labor, the construction speed is slow, the concrete precast block is not easy to fix in use, and the concrete precast block is easy to damage in the pouring and vibrating process; the cost is higher for one-time use.
(5) And (3) a drill rod inserting inspection method: welding a phi 12 steel bar into an F-shaped plug pin, welding horizontal ribs on the plug pin according to the thickness of the plate, after concrete is poured, extending the plug pin into the cast-in-place plate to jack the plug pin on a bottom die, and performing leveling inspection according to the level of the horizontal ribs; the method has the defects that the method is greatly influenced by artificial factors, elevation and flatness are controlled by visual inspection, the precision is difficult to guarantee, and deviation is difficult to find.
The above methods for controlling the elevation and the flatness of the top of the cast-in-place slab are difficult to ensure accurate and effective quality effects, cannot meet the quality standard required by acceptance standards, and have considerable consumed construction cost.
Because the existing special tool and updating process for accurately controlling the top elevation and the flatness of the cast-in-place slab are lacked, the common quality problems of over-standard thickness, unevenness and large flatness deviation of the cast-in-place slab commonly exist, and the quality of cast-in-place structural engineering and the subsequent floor decoration construction are greatly influenced; therefore, a precise leveling tool which can precisely control the top elevation and the flatness of the cast-in-place slab, has the functions of direction adjustment and marking receiving and a cast-in-place slab leveling method which can replace the traditional process need to be designed.
Disclosure of Invention
The invention aims to provide a precise control tool capable of precisely controlling the top elevation and the flatness of a cast-in-place slab, having the functions of direction adjustment and marking receiving and a cast-in-place slab leveling method capable of replacing the traditional process.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a fine control tool for improving the flatness of a cast-in-place slab, which comprises an infrared level meter and a fine leveling tool, wherein the infrared level meter is used for projecting a top elevation and a flatness reference line of the cast-in-place slab; the fine smoothing tool comprises a smoothing board and a grab handle; the trowelling plate is a bending plate, the inner concave surface of the bending plate is used for trowelling, and the outer convex surface is used for installing the grab handle; a target plate for receiving the datum line is vertically arranged on the outer convex surface, and a backward moving target line and a forward moving target line which are aligned with the datum line are arranged on the target plate; a connecting part is arranged between the outer convex surface and the grab handle, one end of the connecting part is movably connected on the outer convex surface, and the other end is fixedly connected with the grab handle; an adjusting support part used for limiting the rotation angle of the bending plate is arranged at the connecting position of the grab handle and the connecting part, and the adjusting support part can be abutted on the outer convex surface or the target plate along with the angle change of the grab handle and the wiping plate.
Preferably, the connecting portion is a threaded inner thread, one end of the connecting portion is hinged to the outer convex surface through a hinge bolt, and the other end of the connecting portion is in threaded connection with the grab handle.
Preferably, the adjusting support is two support rods fixed on the outer surface of the threaded inner wire, and the ends of the two support rods respectively correspond to the outer convex surface and the target plate.
Preferably, the adjusting support part comprises a pipe hoop sleeved on the grab handle and two support rods fixed on the outer surface of the pipe hoop; the ends of the two support rods correspond to the outer convex surface and the target plate respectively.
Preferably, the pipe hoop is rotatably sleeved on the grab handle and is fixed on the grab handle through an anchoring screw; the horizontal projection included angle of the two support rods is 90 degrees.
Preferably, the bending plate is made of a stainless steel plate, and the bending angle is 20 degrees; the horizontal included angle between the support rod and the thread inner thread is 70 degrees.
Preferably, the bending plate is made of a stainless steel plate, and the bending angle is 20 degrees; the horizontal included angle between the support rod and the pipe hoop is 70 degrees.
Preferably, the target is fixed on the bending line of the outer convex surface by angle steel.
Preferably, the target is a transparent polyvinyl chloride plate.
There is also provided a method of site plate leveling comprising the steps of:
step one, preparing the fine control tool, installing the infrared level gauge, projecting a vertical ray and a horizontal ray, and taking the horizontal ray as a reference line for controlling the top elevation and the flatness of the cast-in-place slab;
secondly, pouring concrete on the beam plate;
thirdly, using a fine leveling tool to perform first face folding, adjusting the adjusting support part to enable the support rod to abut against the outer convex surface, and simultaneously enabling the datum line to be kept flush with the backward moving target line; if the reference line is lower than the backward movement target line, pressing down the fine trowel to spread and scrape the excess concrete backward until the reference line is matched with the backward movement target line; if the datum line is higher than the backward moving target line, the supporting rod is made to abut against the target plate, the fine trowelling tool is pushed forwards, and the concrete on the rear side is spread forwards and scraped flat until the datum line is matched with the forward pushing target line of the target plate;
step four, secondary surface collection, wherein before the initial setting of concrete, the surface is collected for the second time, shrinkage cracks generated after surface moisture is evaporated are eliminated by using a wooden trowel, and the cast-in-place slab is covered with a protective film for maintenance after the surface is flattened;
and fifthly, recovering the fine control tool, recovering the infrared level gauge after the cast-in-place plate is finished to be folded, and cleaning the fine leveling tool.
Compared with the prior art, the invention has the following technical effects:
(1) according to the invention, the connecting part is arranged between the outer convex surface of the troweling plate and the grab handle, the target is vertically arranged on the outer convex surface, the adjusting and supporting part can be abutted against the outer convex surface of the troweling plate or the target along with the angle change of the grab handle and the troweling plate, so that when the troweling plate is pulled backwards, the target is abutted by the adjusting and supporting part, and the angle between the grab handle and the troweling plate is fixed; when the grab handle is pushed forwards, the supporting part is adjusted to prop against the outer convex surface of the target plate, so that the angle between the grab handle and the plate is fixed; therefore, the fine trowel has a direction adjusting function, the leveling operation of forward pushing and backward moving of the trowel can be better completed, the construction is simple and rapid, and the trowel is more suitable for manual operation.
(2) The target plate adopts the transparent polyvinyl chloride plate, has a horizontal marking receiving function by adopting the transparent polyvinyl chloride plate, finishes fine leveling of the cast-in-place plate surface corresponding to a horizontal datum line of the infrared level gauge, is small in influence factor from the outside, has accurate and reliable leveling effect, and effectively ensures that the top surface elevation and the flatness of the cast-in-place plate meet the design and standard requirements.
(3) The invention utilizes the fine leveling tool and is matched with the infrared level gauge and the L-shaped bracket to replace the traditional line-passing rule-returning method, the steel bar positioning method, the shaping split heads method, the prefabricated embedded part method, the inserted drill rod inspection method and other prior processes, effectively solves the common quality problems of over-standard thickness, uneven height, large flatness deviation and the like in the cast-in-place slab construction, and fundamentally ensures that the cast-in-place slab casting thickness, top surface elevation and flatness meet the design and standard requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described 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 without inventive exercise.
FIG. 1 is a schematic view of the overall structure of the fine trowel of the present invention;
FIG. 2 is a schematic view of a connecting portion according to the present invention;
FIG. 3 is a schematic view of an adjusting support according to the present invention;
FIGS. 4 and 5 are schematic views of two states of the fine trowel of the present invention during operation;
FIG. 6 is a schematic view of an infrared level according to the present invention.
Wherein, 1-smearing; 2-a grab handle; 3-connecting part, 31-hinge bolt; 4-an adjusting support part, 41-a pipe hoop, 42-a first support rod, and 43-a second support rod; 5-target, 51-backward movement of target line, 52-forward movement of target line; 6-angle steel, 61-bolt; 7-infrared level meter; 8-L-shaped bracket, 81-fixing bolt, 82-fastening bolt; 9-scaffold steel tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a fine leveling tool which can precisely control the top elevation and the flatness of a cast-in-place slab and has the functions of direction adjustment and marking receiving and a cast-in-place slab leveling method which can replace the traditional process.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3, the present invention discloses a fine trowel, which comprises a trowel plate 1 and a handle 2; the trowelling plate 1 is a bending plate, the inner concave surface of the bending plate is used for trowelling, and the outer convex surface of the bending plate is used for installing the grab handle 2; a connecting part 3 is arranged between the outer convex surface and the grab handle 2, one end of the connecting part 3 is hinged on the outer convex surface, and the other end is connected with the grab handle 2; an adjusting support part 4 is arranged at the connecting position of the handle 2 and the connecting part 3, a target 5 is vertically arranged on the outer convex surface, and the adjusting support part 4 can be abutted against the outer convex surface of the troweling plate 1 or the target 5 along with the change of the angle between the handle 2 and the troweling plate 1.
In actual use, an operator holds the handle 2, and when the handle 2 is pulled backwards, as shown in fig. 4, the angle between the handle 2 and the spatula 1 is fixed by adjusting the support part 4 to abut against the target 5; when the handle 2 is pushed forward, as shown in fig. 5, the angle between the handle 2 and the spatula 1 is fixed by adjusting the supporting part 4 to abut against the outer convex surface of the spatula 1 of the target 5; therefore, the fine trowel has a direction adjusting function, the leveling operation of forward pushing and backward moving of the trowel can be better completed, the construction is simple and rapid, and the trowel is more suitable for manual operation.
Further, connecting portion 3 is the screw thread internal thread, and one end is passed through articulated bolt 31 and is articulated on the outer convex surface of trowel plate 1, the other end and grab handle 2 threaded connection.
Further, the adjusting support portion 4 comprises a pipe hoop 41 sleeved on the handle 2 and two support rods fixed on the outer surface of the pipe hoop; the ends of the two supporting rods respectively correspond to the outer convex surface of the trowel 1 and the target 5; when the angle between the grab handle 2 and the troweling plate 1 is enlarged, one of the supporting rods can prop against the target 5, so that the preset maximum angle between the grab handle 2 and the troweling plate 1 is reached, and the angle is not further enlarged; when the angle between the grab handle 2 and the trowelling plate 1 is reduced, one of the supporting rods can prop against the outer convex surface of the trowelling plate 1, so that the preset minimum angle between the grab handle 2 and the trowelling plate 1 is achieved, and the angle is not further reduced. It is to be noted that the structure of the adjustment support portion 4 according to the present invention is not limited to the above-described one, and other modifications exist, such as: the adjusting support portion 4 is two support rods fixed on the outer surface of the threaded inner thread, and the ends of the two support rods respectively correspond to the outer convex surface of the troweling plate 1 and the target plate 5.
Further, the pipe hoop 41 is rotatably sleeved on the grab handle 2 and fixed on the grab handle 2 through an anchor screw; the position of the support rods can be adjusted by rotating the pipe clamp 41, so that the first support rod 42 and the second support rod 43 can be arranged in a manner that the horizontal projection included angle is 90 degrees.
Further, the wiping plate 1 is made of a stainless steel plate, and the bending angle is 20 degrees; the horizontal included angle between the first support rod 42 and the second support rod 43 and the thread inner wire is 70 degrees.
Further, the target 5 is fixed on a bending line of an outer convex surface of the trowel 1 through an angle steel 6 and is fixed on the angle steel 6 through a bolt 61; furthermore, the target 5 is made of a transparent polyvinyl chloride plate; the sighting plate 5 made of transparent polyvinyl chloride has the horizontal marking receiving function, fine leveling of the cast-in-place plate surface is completed by the horizontal marking corresponding to the infrared level meter 7, the influence factor from the outside is small, the leveling effect is accurate and reliable, and the top surface elevation and the flatness of the cast-in-place plate are effectively guaranteed to meet the design and standard requirements.
The fine leveling tool provided by the invention is not only suitable for accurately controlling the elevation and the flatness of horizontal components such as cast-in-place floor slabs and roof slabs, but also can be widely applied to structural engineering such as indoor concrete terraces, plant concrete pavements and the like, has strong universality, effectively simplifies the construction process, improves the working efficiency, saves energy, protects the environment, reduces the cost, accelerates the construction progress, and has good popularization value.
The invention also provides a cast-in-place slab leveling method, which comprises the following steps:
step one, preparing and installing tools, namely preparing an infrared level meter 7 and the fine leveling tool, installing the infrared level meter 7 on a steel pipe 9 of a scaffold outside a floor through an L-shaped bracket 8, and fastening by using a fastening bolt 82; according to the designed elevation of a floor, the top elevation of a cast-in-place slab is projected and measured on the vertical rods of the outer scaffold steel pipe 9, the vertical rods connected with the wall connecting rods are selected, the vertical rods are prevented from shaking, the distance between elevation control points is not more than 30m, and the vertical rods are marked by red paint; and (3) leveling and starting the infrared level meter 7, projecting a vertical line and a horizontal line, adjusting the vertical position of the level meter according to the elevation control point to enable the horizontal projection line to be 120mm higher than the designed elevation of the top of the slab, and using the horizontal projection line as a reference line for controlling the elevation and the flatness of the top of the cast-in-place slab.
Before pouring the beam slab concrete, carrying out quality inspection on the plate bottom elevation, the template and scaffold reinforcing condition and the steel bar binding and mounting condition on site, and pouring the beam slab concrete after acceptance inspection; pumping commercial concrete into a mold, wherein the mold injection temperature is not lower than 5 ℃ and not higher than 35 ℃; when the daily average temperature reaches above 30 ℃, taking cooling measures according to the high-temperature construction requirement, and taking winter construction measures when the daily average temperature is lower than 5 ℃ continuously for 5 days; stopping the high-altitude operation in strong wind weather of more than 6 grades, and forbidding concrete pouring in rainy days; the beam and the slab are poured simultaneously, the pouring method adopts a 'slurry driving method' from one end, namely, the beam is poured firstly, the beam is poured into a step shape according to the height of the beam in a layering way, when the beam reaches the bottom position of the slab, the beam and the slab are poured together, and the beam and slab concrete pouring is continuously carried out forwards along with the continuous extension of the step shape; the thickness of the virtual pavement of the cast-in-place slab concrete is slightly larger than the thickness of the slab by 10mm, the slab vibrator is adopted to vibrate back and forth in the vertical pouring direction, the thick slab can be pulled and vibrated along the pouring direction by adopting an insertion vibrator, vibration points are uniformly arranged, the spacing is controlled to be about 400mm, omission is avoided, the concrete is not allowed to be paved by using a vibrating rod, and the surface can be flattened after the vibration is finished.
Step three, finely leveling the first surface of the trowel, starting from the corner of the cast-in-place slab after pouring, operating workers hold the handle 2 by hands, the included angle between the handle 2 and the horizontal plane is 20 degrees, adjusting and adjusting the supporting part 3, enabling the supporting rod to prop against the outer convex surface of the trowel 1, enabling the included angle between the front end of the trowel 1 and the horizontal plane to be 20 degrees, and simultaneously enabling the horizontal projection line of the infrared level meter 7 to be kept flush with the backward moving target line 51 of the target 5; if the horizontal projection line is lower than the backward moving target line 51, the excessive concrete is spread backwards and scraped evenly by repeatedly rubbing and leveling the downward pressing and fine leveling tool until the horizontal projection line is matched with the backward moving target line 51; if the horizontal projection line is higher than the backward moving target line 51, the supporting rod is enabled to abut against the target 5, an included angle between the rear end of the trowelling plate 1 and the horizontal plane is 20 degrees, the fine leveling trowelling tool is pushed forward, the concrete on the rear side is spread forward and scraped, the trowelling tool is repeatedly rubbed and pressed, the horizontal projection line of the infrared level meter 7 is enabled to be matched with the forward pushing target line 52 of the target, and accordingly the plate top elevation and the flatness meet the precision requirement.
Step four, a fine leveling tool is used for secondary surface collection, the secondary surface collection time of the cast-in-place plate is before initial setting of concrete, the initial setting time of the concrete is related to the variety of cement, the setting condition and the variety and the quantity of the admixture, and the secondary surface collection can be carried out by testing when fingerprints can be left on the spot by fingers according to the fact that the surface of the concrete is not sticky and the fingerprints can be left, the secondary surface collection is carried out backwards from the innermost side of a floor to the direction of a staircase or a safety channel, a wood trowel is used for fine leveling and rubbing, the contraction cracks generated after surface moisture is evaporated are eliminated, the construction joints or the positions with embedded parts and inserted ribs are leveled by the wood trowel, a plastic film is covered and water is sprayed for maintenance after the fine leveling and collection of the cast-in-place plate is finished, and the maintenance time is not less than 7 days;
cleaning a fine trowel for later use, recovering the infrared level meter 7 and the L-shaped bracket 8 after finishing the surface collection of the cast-in-place plate, cleaning mortar on the surface of the fine trowel, timely replacing damaged parts, placing the parts in a dry place for storage, and performing anticorrosion and antirust treatment for later turnover; when the instrument is not used for a long time, the grab handle 2 and the transparent polyvinyl chloride target 5 are detached and placed in a ventilated and dry place to prevent the instrument from being exposed to the sun and rain; the connecting part 3 and the adjusting support part 4 are coated with butter for corrosion prevention and oxidation prevention; the polyvinyl chloride target 5 is stored separately and cannot be placed together with sharp and hard objects, so that the surface of the plate is prevented from being scratched.
According to the method, the precision trowel is utilized, and the infrared level meter 7 and the L-shaped support 8 are matched to replace the traditional line return method, the steel bar positioning method, the shaping split heads method, the prefabricated embedded part method, the inserted drill rod inspection method and other existing processes, so that the common quality problems of over-standard thickness, uneven height, large flatness deviation and the like in cast-in-place slab construction are effectively solved, and the casting thickness, the top surface elevation and the flatness of the cast-in-place slab can be fundamentally ensured to meet the design and standard requirements.
The adaptation according to the actual needs is within the scope of the invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a fine control instrument for improving cast-in-place board roughness which characterized in that: the device comprises an infrared level meter and a fine leveling trowel, wherein the infrared level meter is used for projecting a top elevation and flatness reference line of a cast-in-place slab; the fine smoothing tool comprises a smoothing board and a grab handle; the trowelling plate is a bending plate, the inner concave surface of the bending plate is used for trowelling, and the outer convex surface of the bending plate is used for installing the grab handle; a target plate for receiving the datum line is vertically arranged on the outer convex surface, and a backward moving target line and a forward moving target line which are used for being aligned with the datum line are arranged on the target plate; a connecting part is arranged between the outer convex surface and the grab handle, one end of the connecting part is movably connected on the outer convex surface, and the other end of the connecting part is fixedly connected with the grab handle; an adjusting support part used for limiting the rotation angle of the bending plate is arranged at the connecting position of the grab handle and the connecting part, and the adjusting support part can be abutted against the outer convex surface or the target plate along with the change of the angle of the grab handle and the floating plate.
2. The fine control tool of claim 1, wherein: the connecting part is a threaded inner thread, one end of the connecting part is hinged to the outer convex surface through a hinge bolt, and the other end of the connecting part is in threaded connection with the grab handle.
3. The fine control tool of claim 2, wherein: the adjusting support parts are two support rods fixed on the outer surface of the threaded inner wire, and the end parts of the two support rods respectively correspond to the outer convex surface and the target plate.
4. The fine control tool of claim 2, wherein: the adjusting support part comprises a pipe hoop sleeved on the grab handle and two support rods fixed on the outer surface of the pipe hoop; the ends of the two support rods correspond to the outer convex surface and the target plate, respectively.
5. The fine control tool of claim 4, wherein: the pipe hoop is rotatably sleeved on the grab handle and is fixed on the grab handle through an anchoring screw; the horizontal projection included angle of two bracing pieces is 90.
6. The fine control tool of claim 3, wherein: the bending angle is 20 degrees; the horizontal included angle between the support rod and the thread inner thread is 70 degrees.
7. The fine control tool of claim 5, wherein: the bending angle is 20 degrees; the horizontal included angle between the support rod and the pipe hoop is 70 degrees.
8. The fine control tool according to any one of claims 1 to 7, wherein: the target plate is fixed on the bending line of the outer convex surface through angle steel.
9. The fine control tool of claim 8, wherein: the target plate is made of a transparent polyvinyl chloride plate, and the bending plate is made of a stainless steel plate.
10. A method of on-site plate leveling characterized by: the method comprises the following steps:
s1, preparing the fine control tool according to claim 9, and after the infrared level meter is installed, projecting a vertical ray and a horizontal ray, wherein the horizontal ray is used as a reference line for controlling the top elevation and the flatness of the cast-in-place slab;
s2, pouring concrete of the beam slab;
s3, using a fine leveling tool to perform first face folding, adjusting the adjusting support part to enable the support rod to abut against the outer convex surface, and meanwhile enabling the reference line to be kept flush with the backward moving target line; if the reference line is lower than the backward movement target line, pressing down the fine trowel to spread and scrape the excess concrete backward until the reference line is matched with the backward movement target line; if the datum line is higher than the backward moving target line, the supporting rod is made to abut against the target plate, the fine trowelling tool is pushed forwards, and the concrete on the rear side is spread forwards and scraped flat until the datum line is matched with the forward pushing target line of the target plate;
s4, secondary surface folding, wherein the secondary surface folding time is before initial setting of concrete, shrinkage cracks generated after surface moisture is evaporated are eliminated by using a wooden trowel, and the cast-in-place slab is covered with a protective film for maintenance after the surface is flattened;
s5, recovering the precise control tool, recovering the infrared level gauge after the cast-in-place plate is finished to be folded, and cleaning the precise leveling tool.
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| DE202004017519U1 (en) * | 2004-11-10 | 2005-03-31 | Gerding Andreas | Spreading tool for wood floor treatment of oil and wax or similar has spine with pivot attachment to pivoting handle |
| CN105484500A (en) * | 2015-12-15 | 2016-04-13 | 中国一冶集团有限公司 | Concrete night construction elevation control device and construction method thereof |
| CN210975455U (en) * | 2019-09-27 | 2020-07-10 | 张弓 | A floating device for civil engineering |
| US11000942B1 (en) * | 2017-02-02 | 2021-05-11 | Kraft Tool Company | Adjustable clamping tool clevis |
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- 2022-02-21 CN CN202210154490.5A patent/CN114412186B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004017519U1 (en) * | 2004-11-10 | 2005-03-31 | Gerding Andreas | Spreading tool for wood floor treatment of oil and wax or similar has spine with pivot attachment to pivoting handle |
| CN105484500A (en) * | 2015-12-15 | 2016-04-13 | 中国一冶集团有限公司 | Concrete night construction elevation control device and construction method thereof |
| US11000942B1 (en) * | 2017-02-02 | 2021-05-11 | Kraft Tool Company | Adjustable clamping tool clevis |
| CN210975455U (en) * | 2019-09-27 | 2020-07-10 | 张弓 | A floating device for civil engineering |
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