CN113235865A - Construction method of VNA (VNA) directional passing ultra-flat terrace - Google Patents
Construction method of VNA (VNA) directional passing ultra-flat terrace Download PDFInfo
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- 230000008602 contraction Effects 0.000 claims abstract description 26
- 230000003014 reinforcing effect Effects 0.000 claims description 36
- 238000005520 cutting process Methods 0.000 claims description 20
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- 238000012360 testing method Methods 0.000 claims description 5
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
- E04F15/14—Construction of joints, e.g. dividing strips
- E04F15/142—Dividing strips or boundary strips
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/20—Implements for finishing work on buildings for laying flooring
- E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The application relates to the field of terrace construction, especially, relate to a construction method of VNA directional current super flat terrace, before concrete placement, steel bar frame and dowel steel are preset at the position department that the branch storehouse seam corresponds with the kerf contraction joint, the telescopic node department of dowel steel is to the position of seam, when the terrace surface receives great load, lead to the concrete piece of seam both sides to take place to shift, the dowel steel can stretch out and draw back this moment, increase the stress transmission between the adjacent concrete piece of seam both sides, in order to prevent that the local great load of concrete road surface atress from causing the uneven settlement of concrete road surface, the transmission stress makes adjacent concrete piece atress jointly, thereby reduce the condition that the warpage appears under the long-term load effect in branch storehouse seam and contraction joint, guarantee the roughness of super flat terrace.
Description
Technical Field
The application relates to the field of terrace construction, in particular to a construction method of a VNA directional passing ultra-flat terrace.
Background
The super-flat terrace is the terrace with the highest specification and the highest standard in the world, exerts great advantages on the aspect of logistics storage ground, and can meet the requirements on ground levelness and flatness of a multilayer storage shelf with the length of more than 13 meters, equipment installation and a full-load state.
In the related art, the traditional construction process method of the ultra-flat terrace comprises the following construction steps: (1) the method comprises the following steps of performing warehouse-dividing pouring, determining a datum point, milling and planing an original ground base layer, and adjusting a guide rail to an elevation surface before pouring; (2) coating an interface agent, detecting the slump of each batch of concrete, adopting a pneumatic vibration bridge to effectively vibrate and compact the concrete, after vibration, re-measuring the levelness, and respectively leveling the ground by using an ultra-long scraper; (3) dry-scattering a hardening agent material during initial setting of concrete, and carrying out slurry extraction operation by using a hand-held troweling machine; (4) polishing for multiple times and leveling; (5) and the wear-resistant surface receives light. (6) And using a driving type troweling machine to polish. (7) And the next day, detecting the flatness and levelness of the finished ground and issuing a report. (8) And cutting and shrinking the ground within three days, wherein the span is generally no more than 6 meters. And filling the induced seams.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: the arrangement of the branch bin seam and the contraction seam is not clear, and under the effect of long-term walking load of the VNA forklift, the terrace at the branch bin seam and the contraction seam is easy to deform, so that the normal operation of the VNA forklift is affected, and the efficiency and the economical efficiency of logistics transportation are finally affected.
Disclosure of Invention
In order to reduce the situation that the warping deformation appears under the long-term load effect in branch storehouse seam and shrinkage joint, guarantee the roughness of super flat terrace, this application provides a VNA directional construction method of passing super flat terrace.
The application provides a construction method of VNA directional traffic super-flat terrace adopts following technical scheme:
a construction method of a VNA directional passing ultra-flat terrace comprises the following steps:
the method comprises the following steps: extruded plates are arranged at the wall side and the column side, and reinforcing steel bars are arranged at the column side for reinforcement;
step two: binding steel bars;
step three: processing the bin dividing seam, arranging an elevation belt, wherein the bin dividing seam is arranged right below the VNA high shelf, presetting a dowel bar at the position, the dowel bar is two telescopic bars, and the telescopic bars correspond to the bin dividing seam;
step four: pre-marking the position of a cutting contraction joint, and pre-embedding a dowel bar at the position of the pre-cutting contraction joint, wherein the dowel bar is two telescopic rods, and the telescopic joint corresponds to the position of the pre-cutting contraction joint;
step five: paving and vibrating concrete;
step six: leveling the concrete;
step seven: compounding elevation;
step eight: the ultra-flat hanging ruler is strickled off again, and the surface laitance of the surface concrete is removed;
step nine: after the concrete leveling work is finished, spreading wear-resistant materials;
step ten: leveling again by using the ultra-flat leveling ruler;
step eleven: after the concrete is initially set, polishing and burnishing the terrace;
step twelve: cutting a contraction joint;
step thirteen: cleaning the slurry in the contraction joint, and filling the contraction joint after cleaning;
fourteen steps: floor detection and handover.
By adopting the technical scheme, the dowel bars are arranged at the bin dividing joints and the joint-cutting contraction joints of the ultra-flat terrace, the dowel bars increase the stress transmission between the adjacent concrete blocks at the two sides of the joints so as to prevent the concrete pavement from being unevenly settled due to the local large stress load of the concrete pavement, and the adjacent concrete blocks are stressed together due to the stress transmission, so that the condition that the bin dividing joints and the contraction joints are warped and deformed under the long-term load effect is reduced, and the flatness of the ultra-flat terrace is ensured.
Preferably, in step three and step four, the dowel steel adopts the reinforcing bar frame level fixed to place, the cross-section of reinforcing bar frame is isosceles trapezoid, the reinforcing bar frame includes left side support body and right side support body, connects the connection reinforcing bar of left side support body and right side support body, the both ends of dowel steel respectively with left side support body, right side support body fixed connection.
Through adopting above-mentioned technical scheme, left side support body and right side support body bear the weight of the dowel steel to left side support body and right side support body realize fixed connection through connecting the reinforcing bar, make the reinforcing bar keep certain shape like this, the relative position between left side support body and the right side support body is difficult for producing the change, is convenient for with dowel steel fixed mounting on left side support body and right side support body, the construction installation of being convenient for.
Preferably, after the steel bar frame and the dowel bar are fixedly arranged, the two ends of the connecting steel bar at the left frame body and the right frame body are cut off.
Through adopting above-mentioned technical scheme, will connect the reinforcing bar and cut to make left side support body and right side support body independently part, be located the dowel steel between left side support body and the right side support body, can carry out concertina movement, connect the installation of reinforcing bar and cut, can guarantee to use the installation that can stabilize of preceding dowel steel, do not influence the normal work of dowel steel again after cutting, improve the construction effect.
Preferably, in step two, the reinforcement includes upper reinforcing bar and lower floor's reinforcing bar, does the support with reinforcing bar stirrup between the upper and lower two-layer reinforcing bar, and the interval between the stirrup is 1m, and the protective layer thickness of reinforcement is 30 mm.
Through adopting above-mentioned technical scheme, the reinforcing bar stirrup is arranged in the middle of the upper and lower two-layer reinforcing bar, plays the effect of fixed upper and lower two-layer reinforcing bar. The reinforcing bar stirrup is when the too big unable bearing of self of steel reinforcement cage dead weight, for avoiding warping before concreting too not conform to the requirement of design and add the auxiliary reinforcement of establishing.
Preferably, the concrete in the fifth step is paved and vibrated, a slump test is carried out on the paved and vibrated concrete, and the slump of the concrete is required to be controlled between 140mm and 180mm under the working condition of pumping the concrete; under the working condition of self-unloading concrete, the slump of the concrete is required to be controlled between 100 and 140 mm.
Through adopting above-mentioned technical scheme, pave and vibrate and do the slump test to the concrete, be in order to let the concrete more closely knit, avoid taking place the segregation of concrete in the work progress.
Preferably, the concrete leveling in the sixth step comprises three times of leveling, wherein the paving and injection work is completed by using the vibrating beam for the first time, and the leveling is repeatedly performed by using the aluminum alloy scraper for the second time; and thirdly, leveling again by using a manual leveling machine.
By adopting the technical scheme, the first leveling is carried out, the paving and injection work is completed by using the vibration beam, and the terrace flatness is improved; secondly, repeatedly scraping the aluminum alloy scraper; and leveling for the third time, and leveling again by using a manual leveling device to remove surface floating matters. And the third leveling fully ensures the super-flat effect of the terrace.
Preferably, the construction method for spreading the wear-resistant material in the ninth step comprises the following steps: after the concrete leveling work is finished, uniformly spreading wear-resistant materials, and leveling by using an ultra-flat scraper; after the wear-resistant material absorbs a part of moisture in the concrete, the surface is in a wet state, and the surface is strickleed off by using the manual vertical ruler again.
Through adopting above-mentioned technical scheme, at the surface spreading wear-resistant material of concrete, can improve the wear resistance of terrace, prevent that the terrace from taking place wearing and tearing easily in the use and leading to the roughness and the smoothness reduction of terrace.
Preferably, the wear resistant material comprises a non-metallic wear resistant material.
Through adopting above-mentioned technical scheme, nonmetal wear-resisting material's wear resistance is better, and the colour is dark grey and accords with the resistant dirty requirement of terrace.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the dowel bars are arranged at the bin dividing joints and the joint-cutting contraction joints of the ultra-flat terrace, the dowel bars increase stress transmission between adjacent concrete blocks at two sides of the joints so as to prevent uneven settlement of the concrete pavement caused by large local stress on the concrete pavement and transfer stress to enable the adjacent concrete blocks to bear force jointly, so that the condition that the bin dividing joints and the contraction joints are warped and deformed under the action of long-term load is reduced, and the flatness of the ultra-flat terrace is ensured.
2. Wear-resistant materials are spread on the surface of the concrete, so that the wear resistance of the terrace can be improved, and the terrace is prevented from being worn easily in the using process to reduce the flatness and smoothness of the terrace.
Drawings
Fig. 1 is a schematic structural view of a steel bar frame and a dowel bar in the embodiment of the present application.
Fig. 2 is a schematic cross-sectional view of the steel bar frame and the dowel bar installed in the floor according to the embodiment of the present invention.
Description of reference numerals: 1. a reinforcing steel bar frame; 101. a left frame body; 102. a right frame body; 2. connecting reinforcing steel bars; 3. a dowel bar.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses a construction method of a VNA directional passing ultra-flat terrace, which comprises the following steps:
the method comprises the following steps: and (3) installing a pouring template on the ground, paving steel bars at the column side and the wall side according to elevation errors, performing reinforcing support treatment on the edge of the template by adopting the steel bars, and installing an extruded sheet at the edge of the wall body.
Step two: with reinforcement, lay subaerially, the reinforcing bar divide into two-layerly, including upper reinforcing bar and lower floor's reinforcing bar, the distance is 150mm between two relative reinforcing bars of upper reinforcing bar, and the interval between two relative reinforcing bars of lower floor's reinforcing bar is 200mm, does the support with reinforcing bar stirrup between the upper and lower two-layer reinforcing bar, and the interval between two adjacent stirrups is 1 m.
Step three: and (3) processing a bin dividing seam, wherein the bin dividing seam is processed by adopting finished product armor seam construction, and is provided with an elevation belt, the bin dividing seam is arranged under the VNA high goods shelf, and a dowel bar 3 is preset at the position.
Step four: the position of the cutting shrinkage joint is marked in advance, and a dowel bar 3 is embedded in the position of the pre-cutting shrinkage joint.
In step three and step four, dowel steel 3 adopts steel reinforcement frame 1 level fixed placing on construction ground, the cross sectional shape of steel reinforcement frame 1 is isosceles trapezoid, steel reinforcement frame 1 includes left side support body 101 and right side support body 102, connects left side support body 101 and right side support body 102's connection reinforcing bar 2, left side support body 101 and right side support body 102 are the mirror image setting, left side support body 101 is long frame structure, dowel steel 3 has a plurality ofly, be located between left side support body 101 and the right side support body 102 to arrange along the length direction of left side support body 101 and distribute. Both ends of the connection reinforcing bar 2 are welded and fixed to the top of the left side frame body 101 and the top of the right side frame body 102, respectively, and the connection reinforcing bar 2 maintains the connection integrity between the left side frame body 101 and the right side frame body 102. Two ends of the dowel bar 3 are respectively welded and fixed with the left frame body 101 and the right frame body 102.
After the reinforcing steel bar frame 1 is fixedly placed on the construction ground, two ends of a connecting reinforcing bar 2, which are connected with the left frame body 101 and the right frame body 102, are cut off, at the moment, the left frame body 101 and the right frame body 102 are connected through a dowel bar 3, the dowel bar 3 is a two-section telescopic rod, and the telescopic joint position of the telescopic rod corresponds to a pre-cutting position of a bin dividing seam or a contraction seam.
Step five: concrete paving and vibrating, the concrete process comprises: paving the concrete, keeping the thickness of the concrete consistent during paving, leveling the concrete, and leveling the concrete by using a leveling machine; and carrying out a concrete slump test after leveling, wherein the concrete slump is required to be controlled between 140 and 180. When each car of concrete leaves the field, a barrel of water reducing agent is required to be carried out, and slump tests are carried out on the concrete of each car. The water reducing agent is a concrete admixture which can reduce the mixing water consumption under the condition of keeping the slump of concrete basically unchanged, has a dispersing effect on cement particles after being added with the concrete mixture, can improve the workability, reduce the unit water consumption and improve the flow of the concrete mixture; or reducing the unit cement dosage, saving the cement, and adjusting the concrete with the slump between 140 and 150 by using a water reducing agent.
Wherein the concrete has a compressive strength of C30, a water cement ratio of 0.5 or less, a cement amount of 300Kg or more per cubic meter, and a concrete aggregate with a particle size of 5-25 mm. The sand is medium coarse sand, the density of the sand is generally 1.5-1.7 g per cubic meter, the sand rate is controlled between 35% and 40%, and the air content of the concrete is controlled within 2%.
Step six: leveling concrete, namely leveling the surface of the concrete for three times in the step, finishing paving and injecting work by using a vibrating beam for the first time, and improving the flatness of the terrace; repeatedly leveling by using an aluminum alloy scraper for the second time; and thirdly, leveling again by using a manual leveling machine and removing the plankton and the bleeding on the surface.
Step seven: and compounding the elevation.
Step eight: and the ultra-flat hanging ruler is strickled off again, and the surface laitance of the surface concrete is removed.
Step nine: after the concrete leveling work is finished, the wear-resistant material is spread, and after the concrete leveling work is finished, the hardening agent is manually or mechanically spread on the surface of the concrete. The hardener is a non-metal wear-resistant material of Cika, and the dosage is 5kg per square meter. The construction method comprises the following steps: after the concrete leveling work is finished, uniformly spreading wear-resistant materials, and leveling by using an ultra-flat scraper; after the wear-resistant material absorbs a part of moisture in the concrete, the surface is in a wet state, and the surface is strickleed off by using the manual vertical ruler again.
Step ten: and leveling again by using the ultra-flat scraper.
Step eleven: after the concrete is initially set, the terrace is polished and polished, and a polishing machine is used for polishing and slurry extracting operation of the terrace.
Step twelve: and (3) cutting contraction joints, namely, the floor is cut in a dry cutting mode under the condition of no water spraying, the depth of the expansion joints after cutting is 80mm, the expansion joints around the column of the floor are cut in a rhombic cutting mode, and the cut expansion joints are in a rhombic shape.
Step thirteen: cleaning the slurry in the contraction joint, and filling the contraction joint after cleaning. The specific process comprises the following steps: after the floor surface is finished for one month, loose particles and dust are arranged at the expansion joint, and the cleaning is a mixed solution obtained by mixing a cleaning agent with a pH value of 5 and water. The mixed solution is coated on the inner wall of the expansion joint, cement paste in the expansion joint is cleaned, and gravel in concrete leaks outwards due to the cleaning depth.
In this embodiment, the cleaner that PH value is 5 chooses strong hydrochloric acid solution for use, after wasing the grout, washs the expansion joint with water, washs the completion back, blows hot-blastly to the expansion joint with the air heater, inside the expansion joint of drying with higher speed to it is that the temperature in the expansion joint is more than 50 degrees centigrade, packs in the foam strip to the expansion joint the inside, and the foam strip is the thermal expansion, fills the expansion joint. And after cooling, pumping the polyurethane sealant into the expansion joint by using a glue gun, preventing air from being introduced into the expansion joint when the polyurethane sealant is pumped into the expansion joint, filling the whole expansion joint with the polyurethane sealant, and bonding and combining the foam strips and the polyurethane sealant with the side wall, the bottom and the externally-expanded gravel of the expansion joint.
Fourteen steps: floor detection and handover.
The implementation principle of the construction method of the VNA directional passing ultra-flat terrace in the embodiment of the application is as follows: before concrete pouring, a reinforcing frame 1 and a dowel bar 3 are preset at positions corresponding to a bin dividing joint and a joint-cutting contraction joint, the telescopic joints of the dowel bar 3 are opposite to the joint position, when the floor surface is subjected to a large load, concrete blocks on two sides of the joint are caused to shift, the dowel bar 3 can be stretched and contracted at the moment, stress transmission between the adjacent concrete blocks on two sides of the joint is increased, so that the condition that the concrete road surface is unevenly settled due to the large local stress on the concrete road surface is prevented, the adjacent concrete blocks are stressed together due to the stress transmission, the condition that the bin dividing joint and the contraction joint are warped and deformed under the action of long-term load is reduced, and the flatness of the ultra-flat floor is ensured.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A construction method of a VNA directional passing ultra-flat terrace is characterized in that: the method comprises the following steps:
the method comprises the following steps: extruded plates are arranged at the wall side and the column side, and reinforcing steel bars are arranged at the column side for reinforcement;
step two: binding steel bars;
step three: processing a bin dividing seam, arranging an elevation band, wherein the bin dividing seam is arranged right below a VNA high shelf, presetting a dowel bar (3) at the position, wherein the dowel bar (3) is two sections of telescopic rods, and the telescopic joints correspond to the bin dividing seam;
step four: pre-marking the position of a cutting contraction joint, and pre-embedding a dowel bar (3) at the position of the pre-cutting contraction joint, wherein the dowel bar (3) is two telescopic rods, and the telescopic joint corresponds to the position of the pre-cutting contraction joint;
step five: paving and vibrating concrete;
step six: leveling the concrete;
step seven: compounding elevation;
step eight: the ultra-flat hanging ruler is strickled off again, and the surface laitance of the surface concrete is removed;
step nine: after the concrete leveling work is finished, spreading wear-resistant materials;
step ten: leveling again by using the ultra-flat leveling ruler;
step eleven: after the concrete is initially set, polishing and burnishing the terrace;
step twelve: cutting a contraction joint;
step thirteen: cleaning the slurry in the contraction joint, and filling the contraction joint after cleaning;
fourteen steps: floor detection and handover.
2. The construction method of the VNA directional passing ultra-flat terrace according to claim 1, wherein: in step three and step four, dowel steel (3) adopt steel reinforcement frame (1) level fixed the placing, the cross-section of steel reinforcement frame (1) is isosceles trapezoid, steel reinforcement frame (1) includes left side support body (101) and right side support body (102), connects connection reinforcing bar (2) of left side support body (101) and right side support body (102), the both ends of dowel steel (3) respectively with left side support body (101), right side support body (102) fixed connection.
3. The construction method of the VNA directional passing ultra-flat terrace according to claim 2, wherein: after the reinforcing steel bar frame (1) and the dowel bar (3) are fixedly placed, the two ends of the connecting reinforcing steel bar (2) at the left side frame body (101) and the right side frame body (102) are cut off.
4. The construction method of the VNA directional passing ultra-flat terrace according to claim 1, wherein: in the second step, the reinforcement includes upper reinforcing bar and lower floor's reinforcing bar, uses the reinforcing bar stirrup to support between the upper and lower two-layer reinforcing bar, and the interval between the stirrup is 1m, and the protective layer thickness of reinforcement is 30 mm.
5. The construction method of the VNA directional passing ultra-flat terrace according to claim 1, wherein: fifthly, paving and vibrating the concrete, performing a slump test on the paved and vibrated concrete, and controlling the slump of the concrete to be between 140mm and 180mm under the working condition of pumping the concrete; under the working condition of self-unloading concrete, the slump of the concrete is required to be controlled between 100 and 140 mm.
6. The construction method of the VNA directional passing ultra-flat terrace according to claim 1, wherein: leveling concrete for three times, wherein paving and injecting work is finished by using a vibrating beam for the first time, and repeatedly leveling by using an aluminum alloy scraper for the second time; and thirdly, leveling again by using a manual leveling machine.
7. The construction method of the VNA directional passing ultra-flat terrace according to claim 1, wherein: the construction method for spreading the wear-resistant material comprises the following steps: after the concrete leveling work is finished, uniformly spreading wear-resistant materials, and leveling by using an ultra-flat scraper; after the wear-resistant material absorbs a part of moisture in the concrete, the surface is in a wet state, and the surface is strickleed off by using the manual vertical ruler again.
8. The construction method of the VNA directional passing ultra-flat terrace according to claim 1, wherein: the wear resistant material comprises a non-metallic wear resistant material.
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| EP1801311A1 (en) * | 2005-12-21 | 2007-06-27 | MGSI- Acessorios Para Industrias, LDA | Slab formwork system |
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