CN113445701A - Construction technology of large-area super-flat wear-resistant terrace for hangar - Google Patents
Construction technology of large-area super-flat wear-resistant terrace for hangar Download PDFInfo
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- CN113445701A CN113445701A CN202110725146.2A CN202110725146A CN113445701A CN 113445701 A CN113445701 A CN 113445701A CN 202110725146 A CN202110725146 A CN 202110725146A CN 113445701 A CN113445701 A CN 113445701A
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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
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
- E03F3/046—Open sewage channels
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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
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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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Abstract
The invention discloses a construction technology of a large-area super-flat wear-resistant terrace of a hangar, which comprises the following steps: s1, construction preparation before construction is carried out; s2: and (3) installing edge protection angle steel: an angle iron edge protector is arranged at the joint of the hangar ground rail beam and the inner apron; s3: and (3) installing angle steel of a drainage ditch: drainage ditches are arranged on the north and south sides of the hangar, and angle steel is arranged on the wall of each drainage ditch; s4: installing armor seams: armored seams are arranged at the seams of the floors of the hangar, and two flat steels with the diameter of 10 multiplied by 40mm are adopted for the armored seams. According to the invention, through the application of the integral armor joint, the on-site generation of concrete edge breakage at the deformation joint can be effectively solved; the concrete is paved on the large laser leveling machine, so that the pouring strength and the surface flatness of the concrete can be improved; the independent formwork of column base can reduce the terrace and produce too much negative and positive angle, combines the application of steel fibre concrete and can effectively avoid the fissured production of terrace concrete, can effectively control the construction quality of large tracts of land super flat terrace.
Description
Technical Field
The invention relates to the technical field of hangars, in particular to a construction technology of a large-area super-flat wear-resistant terrace of a hangar.
Background
The hangar is called hangar for short, and a large-span single-layer building for maintaining the airplane is a main building in an airplane maintenance area.
The general service life of traditional concrete terrace is short, along with the extension of service life, in addition under the effect such as carbonization, water erosion, morals and manners, terrace surface can fracture gradually, the pulverization, influences normal use, and the hangar ground is high to the roughness requirement, has proposed resistant aviation oil and aviation hydraulic oil requirement simultaneously, therefore the terrace construction must improve surface strength, reinforcing impervious performance, and how to realize the super flat wear-resisting terrace of hangar large tracts of land is the problem that needs to solve at present urgently.
Disclosure of Invention
The invention aims to solve the problems in the background technology and provides a construction technology of a large-area super-flat wear-resistant terrace of a machine room.
In order to achieve the purpose, the invention adopts the following technical scheme:
the construction technology of the large-area super-flat wear-resistant terrace of the hangar comprises the following steps:
s1, construction preparation before construction is carried out;
s2: and (3) installing edge protection angle steel: an angle iron edge protector is arranged at the joint of the hangar ground rail beam and the inner apron;
s3: and (3) installing angle steel of a drainage ditch: drainage ditches are arranged on the north and south sides of the hangar, and angle steel is arranged on the wall of each drainage ditch;
s4: installing armor seams: armored seams are arranged at the seams of the terrace of the hangar, and two flat steels with the diameter of 10 multiplied by 40mm are adopted for the armored seams;
s5: independent column base formwork support: a steel plate with the thickness of 2mm is embedded on the surface of the terrace and is arranged in an arc shape, and a stiff steel column is fixed on the steel plate;
s6: internal corner reinforcement measures: the connection part of the hangar door buckle and the terrace is isolated by PE (polyethylene) foam cotton with the thickness of 20mm, and the height of the foam cotton is 350 mm; arranging L50 multiplied by 5 galvanized angle steel as a corner protector in a width range of 200mm outside each of two sides of a doorway, and after the construction of a concrete surface layer is finished, adopting polyurethane caulking with the depth of 50 mm;
the connecting part of the ground rail beam and the terrace, the connecting part of the compression bar beam and the wall body and the terrace are isolated by using PE (polyethylene) foam cotton with the thickness of 20mm, the height of the foam cotton is 350mm, and after the construction of the concrete surface layer is finished, polyurethane caulking is adopted, and the depth is 50 mm;
s7: reinforcing steel bars are additionally arranged between the warehouse terrace and the top of the ground well, a reinforcing steel bar mesh is erected by adopting steel bar supporting legs, and the bottoms of the supporting legs and the bottom of the top plate of the ground well are subjected to spot welding;
s8: laying a plastic film: a polyethylene plastic film with the thickness of 0.6mm is fully paved between the fine stone concrete cushion layer and the steel fiber concrete terrace;
s9: concrete construction: pouring in separate bins by a laser leveling machine;
s10: cutting and maintaining;
s11: and (5) sealing and curing agent construction.
Preferably, the grade is found to the escape canal 2m department on the terrace, and the slope is 0.5%.
Preferably, be provided with the apron on the escape canal, 6 x 30 steel sheets are installed between escape canal and the apron, steel sheet upper surface height is less than escape canal upper surface 10 mm.
Preferably, the two flat steels adopt a staggered lap joint design, wherein the end of one flat steel is 80mm beyond the end of the other flat steel.
Preferably, the outer side of the armored seam is fixed by adopting 14-level steel bar welding triangular support frames, and the distance between every two adjacent triangular support frames is 1000 mm.
Preferably, the two flat steels are connected by plastic screws.
Preferably, 10-grade anchoring pins with the length of 120mm are welded on the outer side of each flat steel every other, and the distance between every two adjacent anchoring pins is 230 mm.
Preferably, 150X 130X 6mm force transmission plate pins which are horizontally arranged are arranged on the outer side of the middle part of each flat steel every other, the distance is 500mm, and pin sleeves are arranged at the other ends of the force transmission plate pins.
Compared with the prior art, this super flat wear-resisting terrace construction technology of hangar large tracts of land's advantage lies in:
1. the original concrete tongue-and-groove joint is complex in shape, a template is difficult to support, and an angle steel edge protection system is easy to generate an edge breakage phenomenon, the integral armored joint is adopted to replace the traditional concrete tongue-and-groove joint, no cavity exists at the joint of the armored joint flat steel and the concrete, the flat steel and the concrete can be prevented from being separated, the edge breakage phenomenon of the concrete at a deformation joint can be avoided, and the deformation joint is attractive in shape and straight;
2. by adopting the column foot independent supporting die, the arc-shaped steel plate can reduce excessive internal and external corners of the terrace, and can effectively solve the hidden danger of terrace concrete cracking at the internal and external corners;
3. the edge of the terrace is isolated by PE (polyethylene) foam cotton with the thickness of 20mm, and the PE foam cotton can serve as a buffer layer, so that stress cracks caused by the influence of temperature stress on concrete are avoided;
4. the steel fiber concrete has high bearing capacity and ductility, is fast, convenient, economic and efficient to apply, and can effectively control the generation of concrete cracks of the terrace, improve the surface strength of the concrete of the terrace and enhance the durability of the concrete by replacing the traditional steel fiber concrete;
5. the reasonable bin-dividing pouring mode is adopted, a large laser leveling machine is used for paving concrete, the construction efficiency is high, the labor intensity is low, and the pouring intensity and the surface flatness of the concrete can be obviously improved;
in conclusion, the concrete edge breakage site at the deformation joint can be effectively avoided by applying the integral armor joint; the concrete is paved on the large laser leveling machine, so that the pouring strength and the surface flatness of the concrete can be improved; the independent formwork of column base can reduce the terrace and produce too much negative and positive angle, combines the application of steel fibre concrete and can effectively avoid the fissured production of terrace concrete, can effectively control the construction quality of large tracts of land super flat terrace.
Drawings
FIG. 1 is a flow chart of a construction technology of a large-area super-flat wear-resistant terrace for a hangar according to the invention;
FIG. 2 is a mounting diagram of a ground rail beam and a terrace edge angle iron in the construction technology of a large-area super-flat wear-resistant terrace for a hangar according to the present invention;
FIG. 3 is an installation diagram of angle steel of a drainage ditch in the construction technology of the large-area super-flat wear-resistant terrace of the hangar provided by the invention;
FIG. 4 is a structural diagram of armoring seams in the construction technology of a large-area super-flat wear-resistant terrace for a hangar, which is provided by the invention;
FIG. 5 is a constructional view of a pedestal independent formwork in the construction technology of the large-area super-flat wear-resistant terrace of the hangar provided by the invention;
FIG. 6 is a structural diagram of the junction of a doorway, a ground rail beam and a terrace in the construction technology of a large-area super-flat wear-resistant terrace for an hangar according to the present invention;
FIG. 7 is a structural diagram of the joint of a strut beam, a wall and a floor in the construction technology of a large-area super-flat wear-resistant floor for an hangar according to the invention;
fig. 8 is a structural diagram of terrace internal corner reinforcing steel pipes in the construction technology of a large-area super-flat wear-resistant terrace in a hangar provided by the invention.
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.
Referring to fig. 1-8, a construction technology of a large-area super-flat wear-resistant terrace of a hangar comprises the following steps:
s1, construction preparation before construction is carried out;
s2: and (3) installing edge protection angle steel: an angle iron edge protector is arranged at the joint of the hangar ground rail beam and the inner apron;
s3: and (3) installing angle steel of a drainage ditch: drainage ditches are arranged on the south and north sides of the hangar, angle steel is arranged on the walls of the drainage ditches, slopes are found from 2m positions of the inner terrace to the drainage ditches, the gradient is 0.5%, cover plates are arranged on the drainage ditches, 6 x 30 steel plates are arranged between the drainage ditches and the cover plates, and the heights of the upper surfaces of the steel plates are 10mm lower than those of the drainage ditches;
s4: installing armor seams: the armored joint is arranged at the parting joint of the terrace of the warehouse, the armored joint adopts two flat steels with the diameter of 10 multiplied by 40mm, the two flat steels adopt a staggered lap joint design, the end part of one flat steel exceeds the end part of the other flat steel by 80mm, the staggered lap joint design is quicker and more convenient than a welding design, the outer side of the armored joint is fixed by adopting a 14-grade steel bar welding triangular support frame, the distance between the adjacent triangular support frames is 1000mm, the triangular support frame is used for supporting and reinforcing to ensure the stability of the flat steels, the two flat steels are connected by adopting plastic screws, the plastic screws can be easily broken after the concrete is contracted, 10-grade anchoring studs with the length of 120mm are welded on the outer side of each flat steel, the distance between the adjacent anchoring studs is 230mm, and the anchoring studs extend into the concrete, so that the anchoring performance between the concrete and the flat steels is enhanced; the joint of the flat steel and the concrete has no cavity, so that the flat steel and the concrete are prevented from being separated, seamless connection is really realized, force transfer plate pins of 150 multiplied by 130 multiplied by 6mm which are horizontally arranged are arranged at the outer side of the middle part of each flat steel, the distance is 500mm, pin sleeves are arranged at the other ends of the force transfer plate pins, the force transfer plate pins can prevent the concrete plates at two sides of the armored seam from generating uneven settlement at the expansion joint part, the slab staggering condition can be avoided, the pin sleeves can reduce the resistance force when the concrete shrinks, and the concrete can freely stretch out and draw back;
s5: independent column base formwork support: a steel plate with the thickness of 2mm is embedded on the surface of the terrace and is arranged in an arc shape, a stiff steel column is fixed on the steel plate, the steel plate is stressed evenly, the settlement value around the stiff steel column is ensured, the generation of a negative and positive angle is avoided through the arc-shaped steel plate, and the cracking of terrace concrete at the negative and positive angle part is effectively avoided;
s6: internal corner reinforcement measures: the connection part of the hangar door buckle and the terrace is isolated by PE (polyethylene) foam cotton with the thickness of 20mm, and the height of the foam cotton is 350 mm; arranging L50 multiplied by 5 galvanized angle steel as a corner protector in a width range of 200mm outside each of two sides of a doorway, and after the construction of a concrete surface layer is finished, adopting polyurethane caulking with the depth of 50 mm;
the connecting part of the ground rail beam and the terrace, the connecting part of the compression bar beam and the wall body and the terrace are isolated by PE (polyethylene) foam cotton with the thickness of 20mm, the height of the foam cotton is 350mm, after the construction of the concrete surface layer is finished, polyurethane caulking is adopted, the depth is 50mm, and the concrete around the terrace can be freely contracted through the polyurethane caulking;
s7: reinforcing steel bars are additionally arranged between the warehouse terrace and the top of the ground well, reinforcing steel bar meshes are erected by adopting steel bar supporting legs, the bottoms of the supporting legs and the bottom of the top plate of the ground well are subjected to spot welding, the embedding depth of the reinforcing steel bar meshes is not too large, and the distance between the tops of the reinforcing steel bar meshes and the finished floor surface is 30-40 mm;
s8: laying a plastic film: a polyethylene plastic film with the thickness of 0.6mm is fully paved between the fine stone concrete cushion layer and the steel fiber concrete terrace;
the effect of the film is as follows:
(1) the friction coefficient between the bottom of the terrace and the base layer is reduced, so that the contraction and expansion of the concrete terrace are not restricted, and the possibility of forming cracks at the bottom of the slab is reduced;
(2) the concrete is prevented from leaking slurry and losing water prematurely, and the concrete is used as a moisture-proof layer;
before concrete is poured, a polyethylene plastic film is fully paved, the thickness of the film is 0.6mm, and the width of the film is 4 m. The film laying requirements are as follows:
(1) before laying, the base layer must be smooth and cleaned, and no accumulated water or sundries are required to be stored;
(2) the lapping width between the films is not less than 300mm, and the films are firmly bonded and fixed by using adhesive tapes;
(3) the film needs to penetrate through the bottom of the armor seam and needs to extend to the wall surface, and the upward return height is not less than 400 mm.
S9: concrete construction: pouring in separate bins by a laser leveling machine;
the machine library is poured by steel fiber concrete with the thickness of 400mm, large-scale laser leveling machines are adopted for separate pouring, the daily pouring amount can reach 1500-2500 m, and the laser leveling machines have uniform high-frequency vibration, so that the concrete floor is compact, and ground cracks caused by stress concentration generated by deformation can be avoided; compared with the traditional concrete pouring leveling mode, the concrete pouring leveling method has three advantages: faster, flatter, and takes less time to complete the engineering task;
the steel fiber is a reinforcing material of concrete and other materials, and the steel fiber concrete is mainly applied to industrial terraces, piling terraces, engineering piles, terrace surface layers and prefabricated products. At present, the steel fiber is divided into three different types according to the relationship between the length and the diameter of the steel fiber (main factors for determining the high-quality grade of the steel fiber) at home, namely:
(1) aspect ratio L/D = 45, standard function, D = 0.9 mm;
(2) aspect ratio L/D = 65 for excellent function, D = 0.9 mm;
(3) the length-diameter ratio L/D =80, which is super-functional.
2. The steel fiber concrete has the advantages that:
(1) high bearing capacity and ductility;
(2) the generation of concrete cracks can be effectively controlled;
(3) the tensile strength, the bending strength, the shearing strength and the torsional strength are high;
(4) the durability of the concrete can be enhanced;
(5) the application is quick and convenient, and the efficiency and the economy are high;
the steel fiber adopted has the following relevant technical parameters:
(1) the model is as follows: 3D 80/60BG, length L =60mm, diameter D =0.75mm, aspect ratio L/D = 80.
(2) Tensile strength: more than 1100MPa, and the mixing amount is as follows: 20kg/m3, bonded in rows with water-fusible glue, with hooks at both ends.
2. 400 thick C30 concrete (steel fiber is mixed in the concrete), the surface is spread with 2 times of non-ignition hardening agent for leveling (cutting seam of a special cutting machine), and the penetration of the sealing curing agent on the finished surface is 7mm (Mohs hardness is more than 7).
3. The concrete adopts ordinary portland cement, and the relevant technical parameters are as follows:
(1) the introduction amount of the chloride ions and the air entraining agent is less than or equal to 3 percent;
(2) the water-cement ratio is preferably 0.45, the maximum water-cement ratio is not more than 0.5, and the mixing amount of the fly ash is not more than 80kg/m 3;
(3) the mud content in the aggregate and the sand is not more than 1 percent.
(4) The maximum particle size of the coarse aggregate should not exceed 30mm, and continuous grading should be performed.
(5) The slump is controlled to be 160-180 mm when the mould is put into a mould, and the mould is continuous and stable without bleeding and segregation phenomena;
before the concrete is poured, the installation work of the various structural parts is finished according to the requirements. The measurer shall retest the following contents according to the axis and elevation marks reserved on the frame columns of the hangar hall, and the concrete pouring work can be carried out after the result is correct:
(1) the size line of the ground well and the top height of the well cover (2% of the top plate of the ground well needs to be noted for slope finding);
(2) the dimension line of the drainage ditch and the elevation of the angle steel (attention needs to be paid to the slope finding range, 0.5 percent of slope finding and the elevation of the top of the angle steel is-0.010);
(3) sheathing a position line of the armor seam and a top mark height;
(4) level control line of laser leveling machine;
(5) the position line and the top mark height of angle steel at the edge parts of terraces such as ground rail beams and the like;
(6) the top of the template of the column foot independent formwork is higher (lower than the finished surface by 3 mm);
2. and controlling the deviation of the ground elevation within +/-5 mm, checking the elevation of each base point by using a level gauge, checking the height of the armored seam by using a laser receiver, and immediately adjusting the height if the deviation exists.
Concrete is built in different storehouses
And the hangar hall starts to pour concrete after finishing the construction of a concrete cushion and the binding of the steel bars of the top plate of the ground well. And pouring the terrace drainage ditch, the ground well top plate and the terrace simultaneously in a tank car self-unloading mode. The pouring sequence is from the middle to the south and north.
Laser leveling machine installation and debugging
Selecting a proper position, installing a laser transmitter, presetting the height of a receiver according to the designed elevation of the concrete surface layer, and adjusting the height of the operation unit of the laser leveling machine to be in accordance with the designed elevation; the problems of construction elevation error and quality are influenced by no laser emission blind area in the construction process are guaranteed to the maximum extent;
concrete mixing and transporting
Because the steel fiber is added during the concrete premixing, a specially-assigned person needs to monitor whether the mixing amount of the steel fiber meets the requirement. According to the volume of the concrete mixed in each tray (3 m 3), the mixing time (90-120S) and the steel fiber mixing amount (20 kg/m 3), the steel fiber feeding time is strictly controlled, and the phenomenon that the steel fibers are fed too slowly to cause uneven stirring is avoided.
Each batch of commercial concrete needs to have a delivery quality detection report of cement and a delivery inspection list of sandstone aggregate. According to the concrete carrying distance, the attenuation of the concrete slump needs to be considered, and the slump of the incoming form at the arrival place is ensured to meet 160-180 mmmm.
3. Concrete paving
After the concrete tank truck arrives at the site, the concrete must be checked for open-tray identification and slump, and the concrete can be unloaded after meeting the requirements. The concrete is poured from east to west by adopting a tank car self-unloading mode, the advancing speed of the tank car is controlled according to the unloading speed, and the problem that the effect is reduced due to the fact that the manual paving amount is increased because the tank car is advanced too fast or unloaded too slowly is avoided. Constructors correctly command the tank car to evenly discharge materials, the laser leveling machine is guaranteed to have enough space to carry out concrete leveling operation, and the pre-paving distance of concrete is controlled not to exceed the maximum extension length of the laser leveling machine.
4. Concrete vibration
Because the thickness of the terrace reaches 400mm, in order to ensure the pouring quality, an inserted vibrating rod is adopted for vibrating. The vibrating rod is inserted into the bottom of the vibrating rod for vibrating in a row-column or staggered mode according to the requirement of fast insertion and slow pulling, the distance between insertion points is not more than 1.5R (R is the effective acting radius of the vibrating rod), and the vibrating rod starts to be pulped and does not generate bubbles. And then, a 6m push ruler and a pull ruler are adopted for strickling, and the advancing speed is controlled well, so that stones on the surface layer of the concrete are uniformly distributed, and the plastering performance is improved.
When concrete is poured and vibrated, a specially-assigned person is required to nurse the components such as the professional pipelines, the edge-protecting angle steels and the armored seams, and the direct vibration or touch of the vibrating rod is strictly prohibited.
5. Laser leveling of concrete
After the concrete is vibrated, immediately performing laser leveling operation on the concrete by adopting a large laser leveling machine according to the direction from east to west, and rechecking the elevation of the finished surface in the leveling process. The high-precision bridge level meter is synchronous with laser leveling, and elevation retest of 2-4 points is carried out on each raked live surface to ensure that the error between the final live surface and the designed elevation is within +/-2 mm;
column base, wall limit, well lid all around and adorn positions such as armoring seam limit, laser evener operation blind area, need arrange professional leveling personnel and strickle with 3m scratch board cross flattening to check repeatedly whether the elevation meets the requirements, guarantee to level unanimously with the big face.
6. Flatness of secondary recheck
When the concrete is initially set, the ground leveling team wears the mesh shoes, the flatness secondary detection is carried out on the initially set operation surface by adopting the high-precision level gauge and the 6m scraper, and the parts with flatness errors exceeding 6m +/-5 mm are trimmed and leveled.
Construction of wear-resistant hardened surface layer
1. Surface slurry extraction
(1) The steel fiber concrete is characterized in that the exposed steel fiber stabs are covered by the slurry head before initial setting, and residual exposed steel fibers are manually removed before the abrasion-resistant surface layer is polished.
(2) The steel fiber concrete surface is carried thick liquid and needs to go on in time, and when the concrete got into the initial set stage, when the concrete surface was softer, wear-resisting aggregate constructor worn the net shoes and used single-disk smoothing machine (install the disc additional) to carry out the operation, rubs the surface mortar layer and beats evenly (carries the thick liquid). If the concrete surface has laitance, a troweling machine is used to uniformly break the surface laitance layer.
2. Spreading the first wear-resistant aggregate
(1) After the concrete is initially set, water stains on the surface of the concrete disappear, the concrete has enough strength (more than or equal to 1.2 MPa) to bear the operation of a troweling machine, the material is scattered, 2/3 wear-resistant materials with specified dosage (8 kg/m 2) are uniformly scattered on the initially set surface of the concrete, and the first material scattering is completed;
(2) after the wear-resistant material absorbs certain moisture, using a 6-meter push ruler to integrally scrape and level the whole body vertically and horizontally during rough wiping and checking the elevation and the flatness of the finished surface;
(3) after the leveling operation is carried out, the single-disc troweling machine (additionally provided with the disc) is adopted for carrying out the grinding operation, the machine installing time is determined according to the slump, the air temperature and other factors of the concrete, at least five times of troweling machine (additionally provided with the disc) operations are carried out for grinding and compacting according to the hardening condition of the surface layer, the running speed of the troweling machine is properly adjusted according to the hardening condition of the concrete ground, and the troweling machine operations are carried out in a criss-cross mode. And the flatness is checked vertically and horizontally by a scraping ruler and is flattened. The trowelling work is continued until the surface of the concrete is smooth and has no obvious defects;
spreading the second wear-resistant aggregate
(1) After the wear-resistant material has hardened to a certain stage, a second material dispensing operation (1/3 material) is performed, the second dispensing direction being perpendicular to the first one.
(2) When the wear-resistant material is spread, the setting performance of concrete must be mastered, and the hardening agent is timely added by an organizer to spread the material and perform subsequent construction. The working surface is seriously trampled, the color is polluted and the flatness is damaged due to the early investment time; if the concrete is put into the concrete, the hardening agent is not well combined with the concrete, so that the concrete is skinned and hollowed, and if the concrete is serious, the hardening agent cannot be constructed.
(3) The spreading quality requirement is as follows: the amount of the hardener is enough, the thickness of the scattering materials is consistent, the scattering direction is clear, no omission and no accumulation exist, and the scattering materials at the corners are proper. And (5) inspecting the surface of the scattered material, and scraping and uniformly spreading the bar in time once the scattering uneven part is found. The wall surface, the cylindrical surface and other finished products cannot be polluted when the cleaning agent is thrown.
Surface light collecting
(1) After the wear-resistant materials are spread for the second time, the surface finishing team leveling personnel wear the 6m + 3m sliding ruler for the screen shoes to conduct 4-6 times of secondary accurate leveling to the surface layer, and arrange the special person to conduct longitudinal, transverse and oblique carpet type inspection to the operation surface through the 3m guiding ruler, so that the final flatness is guaranteed to reach the standard.
(2) The concrete surface must be finished in time, and the final finishing and compaction are carried out by using a driving type double-disc troweling machine (without a disc), and at least six operations are carried out according to the hardening condition of the concrete. The running speed of the troweling machine and the angle change of the blade are adjusted according to the hardening condition of the concrete terrace, and the troweling machine operation is carried out in a longitudinally and transversely staggered mode;
s10: cutting and maintaining;
in order to reduce cracks caused by concrete shrinkage and temperature change, the cutting must be completed within 36 hours after the concrete is finally set. The depth of the kerf is required to be 50mm, but the depth of the kerf is adjusted to be 80mm and the width of the kerf is adjusted to be 8mm by considering the larger thickness of the terrace, and polyurethane caulking is adopted. The pitch of the cutting seams is 9.8m multiplied by 9.9 m;
1. cutting time: in order to prevent the terrace from cracking, the large-area terrace constructed by the laser leveling machine is required to be cut as early as possible under the condition of ensuring no edge burst during cutting, and the concrete compressive strength is not less than 10MPa during cutting;
2. the expansion joint is constructed by adopting a soft cutting method, after finishing the light collection of the wear-resistant surface layer, the elastic line work is carried out according to the position of the cutting seam, and the expansion joint is cut in time under the condition of meeting the cutting condition;
3. the construction is usually finished within 36 hours after the construction of the wear-resistant ground (considering the strength of the ground and no edge breakage), and the concrete is suitable for cutting, so that the stress of the concrete is uniformly released;
note that: and cleaning the mortar generated by cutting by using a dust collector during cutting.
Terrace maintenance
The hangar terrace is maintained by covering a plastic film and spraying water by geotextile. After the joint cutting is finished, the ground is completely cleaned by using an industrial floor cleaning machine, so that the clean ground is maintained;
and after the joint cutting procedure is finished, watering for maintenance, wherein the maintenance period is not less than 14 days, and the surface of the terrace is ensured to be in a wet state in the maintenance period. Safety isolation is needed in the maintenance period, and all personnel are strictly prohibited to enter and exit for maintenance work; the complete curing period of the concrete is 14 days, the use of heavy load is avoided in the period, and vehicles with the weight of more than 3 tons are forbidden to enter the surface of the concrete in the curing period;
s11: and (5) sealing and curing agent construction.
The seal cure process and procedure are shown in the following table:
TABLE 1 construction procedure of sealing curing agent
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides a machine storehouse large tracts of land surpasses wear-resisting terrace construction technology of level which characterized in that includes following step:
s1, construction preparation before construction is carried out;
s2: and (3) installing edge protection angle steel: an angle iron edge protector is arranged at the joint of the hangar ground rail beam and the inner apron;
s3: and (3) installing angle steel of a drainage ditch: drainage ditches are arranged on the north and south sides of the hangar, and angle steel is arranged on the wall of each drainage ditch;
s4: installing armor seams: armored seams are arranged at the seams of the terrace of the hangar, and two flat steels with the diameter of 10 multiplied by 40mm are adopted for the armored seams;
s5: independent column base formwork support: a steel plate with the thickness of 2mm is embedded on the surface of the terrace and is arranged in an arc shape, and a stiff steel column is fixed on the steel plate;
s6: internal corner reinforcement measures: the connection part of the hangar door buckle and the terrace is isolated by PE (polyethylene) foam cotton with the thickness of 20mm, and the height of the foam cotton is 350 mm; arranging L50 multiplied by 5 galvanized angle steel as a corner protector in a width range of 200mm outside each of two sides of a doorway, and after the construction of a concrete surface layer is finished, adopting polyurethane caulking with the depth of 50 mm;
the connecting part of the ground rail beam and the terrace, the connecting part of the compression bar beam and the wall body and the terrace are isolated by using PE (polyethylene) foam cotton with the thickness of 20mm, the height of the foam cotton is 350mm, and after the construction of the concrete surface layer is finished, polyurethane caulking is adopted, and the depth is 50 mm;
s7: reinforcing steel bars are additionally arranged between the warehouse terrace and the top of the ground well, a reinforcing steel bar mesh is erected by adopting steel bar supporting legs, and the bottoms of the supporting legs and the bottom of the top plate of the ground well are subjected to spot welding;
s8: laying a plastic film: a polyethylene plastic film with the thickness of 0.6mm is fully paved between the fine stone concrete cushion layer and the steel fiber concrete terrace;
s9: concrete construction: pouring in separate bins by a laser leveling machine;
s10: cutting and maintaining;
s11: and (5) sealing and curing agent construction.
2. The construction technology of the large-area ultra-flat wear-resistant terrace of the machine depot according to claim 1, wherein 2m from the terrace to the drainage ditch is used for finding a slope with a slope of 0.5%.
3. The construction technology of the machine-reservoir large-area ultra-flat wear-resistant terrace according to claim 1, wherein a cover plate is arranged on the drainage ditch, 6 x 30 steel plates are arranged between the drainage ditch and the cover plate, and the height of the upper surface of each steel plate is 10mm lower than that of the upper surface of the drainage ditch.
4. The construction technology of the large-area ultra-flat wear-resistant terrace of the machine depot according to claim 1, wherein the two flat steels are in a staggered lap joint design, and the end of one flat steel is 80mm beyond the end of the other flat steel.
5. The construction technology of the large-area ultra-flat wear-resistant terrace of the hangar according to claim 1, characterized in that the outer side of the armored seam is fixed by welding triangular supporting frames with 14-level steel bars, and the distance between the adjacent triangular supporting frames is 1000 mm.
6. The construction technology of the large-area ultra-flat wear-resistant terrace of the hangar according to claim 1, wherein two flat steels are connected by plastic screws.
7. The construction technology for the large-area ultra-flat wear-resistant terrace of the hangar according to claim 1, wherein 10 grades of anchor pins with the length of 120mm are welded on the outer side of each flat steel, and the distance between every two adjacent anchor pins is 230 mm.
8. The construction technology of the large-area ultra-flat wear-resistant terrace of the machine library according to claim 1, wherein force transmission plate pins of 150 x 130 x 6mm are horizontally arranged at intervals on the outer side of the middle part of the flat steel, the distance is 500mm, and pin sleeves are arranged at the other ends of the force transmission plate pins.
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Cited By (1)
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| CN115162668A (en) * | 2022-07-21 | 2022-10-11 | 中亿丰建设集团股份有限公司 | High-solid-content and high-wear-resistance hangar terrace construction process and terrace |
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