阅读说明：本技术 一种建筑工程地坪施工方法 (Construction method for floor of constructional engineering ) 是由 陈绍伟 黄建忠 张维文 许兴国 袁斌斌 于 2019-08-12 设计创作，主要内容包括：本发明公开了一种建筑工程地坪施工方法,包括以下步骤：S1：在地坪施工之前,首先对结构面进行垃圾清理,并进行抄平、放线,严格控制标高,如出现标高问题,需提前处理,基层清理完毕后,在施工前需将结构面进行洒水湿润处理；S2：采用Φ6*200的钢筋网片铺设地坪刚性层,钢筋绑扎采用隔跨绑扎,并在伸缩缝处将钢筋网片断开,钢筋施工时确保钢筋绑扎质量。本发明可有效防止地坪出现裂缝和脱皮,地坪韧性和机械强度较好,地坪表面光滑平整,可有效减少后期维护成本,保证地坪的使用寿命；有利于控制地坪表面平整度,并且能减少或者避免大面积现浇地坪因温度变化或混凝土硬化收缩造成的开裂等,从而切实提高了耐磨地坪的施工质量。(The invention discloses a construction method of a building engineering terrace, which comprises the following steps: s1: before the floor construction, firstly, cleaning the structure surface with garbage, leveling and paying off, strictly controlling elevation, if the elevation problem occurs, processing in advance, and after the base layer is cleaned, spraying water to wet the structure surface before the construction; s2: adopt phi 6 x 200's reinforcing bar net piece to lay terrace rigid layer, the reinforcement adopts to separate to stride the ligature to break off reinforcing bar net piece in expansion joint department, ensure the reinforcement quality during the reinforcement construction. The invention can effectively prevent the terrace from cracking and peeling, has better toughness and mechanical strength, smooth and flat surface, can effectively reduce the later maintenance cost and ensure the service life of the terrace; the method is favorable for controlling the surface flatness of the terrace, and can reduce or avoid cracking and the like of the large-area cast-in-place terrace caused by temperature change or concrete hardening shrinkage, thereby practically improving the construction quality of the wear-resistant terrace.)

1. A construction method of a floor of a building engineering is characterized by comprising the following steps:

s1: before the floor construction, firstly, cleaning the structure surface with garbage, leveling and paying off, strictly controlling elevation, if the elevation problem occurs, processing in advance, and after the base layer is cleaned, spraying water to wet the structure surface before the construction;

s2: paving a terrace rigid layer by using a phi 6 x 200 steel bar mesh, binding steel bars at intervals, disconnecting the steel bar mesh at the expansion joint, and ensuring the steel bar binding quality during steel bar construction;

s3: adopting span-separated pouring to pour the large-area terrace, reducing the erecting of templates and ensuring that the site has sufficient working surface, as shown in figure 1; the method comprises the following steps of (1) partitioning a batten serving as a template into strip-shaped sections, controlling the elevation of a floor surface layer by using an instrument for an upper opening of the batten, and filling a gap of a lower opening of the batten with a steel bar or a steel plate to prevent the batten from sinking to influence the elevation of the floor;

s4: after the templates are erected and the acceptance is qualified, carrying out terrace concrete pouring, pouring the terrace concrete according to the design drawing, wherein the terrace concrete is 80mm thick and C25 fine stone concrete, the pouring needs to be vibrated compactly to ensure the pouring quality of the concrete, the carborundum surface layer construction is started after the concrete is condensed for 2-4 hours, and the carborundum material mixing is carried out simultaneously in the concrete construction process;

s5: spreading emery for the first time, and then smoothing and polishing, wherein the consumption of emery aggregate is 5KG/M²；

S6: spreading emery again, and then smoothing and polishing, wherein the amount of emery aggregate is 5KG/M²；

S7: after finishing the polishing operation, the phenomenon of disordered surface textures exists, the steel trowel is adopted to carry out ordered manual polishing and burnishing on the surface layer to eliminate the polishing textures, the modification process is completed, and after finishing the modification of the surface of the terrace, the film is adopted to cover, spray water and maintain, so that the surface layer of the terrace is prevented from cracking;

s8: after floor concrete is poured for 6 hours, expansion joints are formed, the positions of the expansion joints correspond to the axial line positions of the basement, the length of one-time cutting is 6-8 m, the cutting is performed by means of elastic line cutting in a unified mode, the cutting depth is 50mm, the width is 20mm, and the expansion joints are filled with building ointment;

s9: in order to prevent the terrace around the basement frame column from cracking, expansion joints are required to be arranged around the frame column, as shown in fig. 3; the expansion joint is cut at a position which is 300mm away from the column edge, the gas cutting width is 4mm, and the depth is 50 mm.

2. The construction method for the terrace of the building engineering according to claim 1, wherein template positioning steel bars are arranged on the outer side of the batten for reinforcement when the supporting template is poured for the first time in the step S3, and the reinforcing steel bars are arranged one by one at intervals of 1 meter as shown in FIG. 2; and no reinforcing steel bar is needed to be arranged when the formwork is erected in the second pouring.

3. The construction method for the building engineering terrace according to claim 1, wherein the strength of the concrete poured in the step S4 is not lower than C25, the water cement ratio is as small as possible, the concrete contains more than 350kg/m3 of cement, and the water cement ratio is less than 0.45; controlling the slump of the on-site mixed concrete to be 1-3c, and controlling the slump of the commercial concrete to be 13-15 cm; when the thickness of the concrete is more than 8cm, the concrete is poured by using common concrete, when the thickness of the concrete is less than 8cm, the concrete is required to be poured by using sandstone concrete, and the content of sandstone is not more than 1%.

4. The method for constructing the terrace of the constructional engineering as claimed in claim 1, wherein in the step S4, after the concrete is compacted by being horizontally dragged and vibrated by the insertion type vibrating bar, the concrete is initially leveled by the scraping rule, and the material is supplemented or the excess concrete is removed in time according to specific conditions, then the two ends of the long aluminum alloy scraping rule are tightly held at the two sides of the aluminum alloy concave bar punching rib, so that the concrete is repeatedly scraped along the length direction by the scraping rule abutting against the top surface of the concave bar, and the material is supplemented in time at the concave surface to clean the scraped excess concrete in time.

5. The method for constructing a terrace for construction engineering as claimed in claim 1, wherein in the step S5, when the emery is spread for the first time, the emery should be spread from the edge of the column, wall, door, and form plate first time, the amount of the first spreading is two thirds of the total amount of the emery, the emery should fall down uniformly and should not be thrown randomly, the emery should be trowelled by wood, after the emery is bonded with the concrete, the emery is bonded with the concrete slurry by the polishing machine.

6. The method for constructing a floor of a construction project according to claim 1, wherein the method for determining the first emery spreading time in the step of S5 is as follows: the operator steps on the concrete surface, and if the stepping part sinks by 4mm-6mm, the first carborundum spreading operation can be carried out.

7. The method for constructing a terrace for construction engineering according to claim 1, wherein the second spreading of the diamond grains in step S6 is performed perpendicular to the first spreading direction, the second spreading amount is one third of the total amount, the troweling and polishing operation is performed immediately after the spreading, and the leveling and polishing operation is performed by using a guiding rule and a scraping bar, and adjusting the uneven portion during the first spreading; and at least twice polishing, wherein the polishing machine is operated in a criss-cross manner, so that the materials are uniform and orderly, the surface flatness is ensured as much as possible during polishing operation, and surface cracking, peeling and sand blasting are avoided.

8. The method as claimed in claim 1, wherein the expansion joint of the frame column in step S9 is cut in place at one time, and the cutting time of the expansion joint is 6 hours after the concrete is poured.

9. The construction method of the building engineering terrace according to claim 1, characterized in that a curing agent is sprayed or brushed for curing after 5-6 hours of construction to prevent the abrupt evaporation of the surface moisture and ensure the stable increase of the strength of the wear-resistant material; during winter construction, a layer of plastic film and a straw bag are covered, and the maintenance time is more than 7 days.

Technical Field

The invention relates to a terrace construction method, in particular to a construction method of a building engineering terrace.

Technical Field

With the increasing widespread application of large-area concrete wear-resistant terraces to projects such as industrial plants, warehouses, large-scale parking lots, supermarket stores, logistics centers and the like, the construction method is also continuously developed;

the traditional method for controlling the flatness of the large-area concrete terrace mainly adopts a method of making ash cakes to beat cakes or simply dividing and supporting a formwork on a concrete base layer (structural layer), and a method of supporting a steel mould or a wood mould to block and treat secondary treatment is adopted at the corner positions of expansion joints of construction joints, drainage ditches, water collection pits and floor surfaces. The terrace of this traditional handicraft construction can not satisfy the requirement to the terrace quality of modern industry factory building etc to quality problems such as obvious large tracts of land fracture, corner lack the arris angle of falling often appear, and terrace toughness is relatively poor, and the later maintenance cost is higher, and life is shorter, can't satisfy the user demand.

Disclosure of Invention

The invention aims to provide a construction method of a floor in constructional engineering, which has the characteristics of preventing the floor from cracking and peeling, improving the toughness and mechanical strength of the floor and effectively reducing the later maintenance cost.

In order to achieve the purpose, the invention provides the following technical scheme: a construction method of a building engineering terrace comprises the following steps:

s1: before the floor construction, firstly, cleaning the structure surface with garbage, leveling and paying off, strictly controlling elevation, if the elevation problem occurs, processing in advance, and after the base layer is cleaned, spraying water to wet the structure surface before the construction;

s2: paving a terrace rigid layer by using a phi 6 x 200 steel bar mesh, binding steel bars at intervals, disconnecting the steel bar mesh at the expansion joint, and ensuring the steel bar binding quality during steel bar construction;

s3: adopting span-separated pouring to pour the large-area terrace, reducing the erecting of templates and ensuring that the site has sufficient working surface, as shown in figure 1; the method comprises the following steps of (1) partitioning a batten serving as a template into strip-shaped sections, controlling the elevation of a floor surface layer by using an instrument for an upper opening of the batten, and filling a gap of a lower opening of the batten with a steel bar or a steel plate to prevent the batten from sinking to influence the elevation of the floor;

s4: after the templates are erected and the acceptance is qualified, carrying out terrace concrete pouring, pouring the terrace concrete according to the design drawing, wherein the terrace concrete is 80mm thick and C25 fine stone concrete, the pouring needs to be vibrated compactly to ensure the pouring quality of the concrete, the carborundum surface layer construction is started after the concrete is condensed for 2-4 hours, and the carborundum material mixing is carried out simultaneously in the concrete construction process;

s5: spreading emery for the first time, and then smoothing and polishing, wherein the consumption of emery aggregate is 5KG/M²；

S6: spreading emery again, and then smoothing and polishing, wherein the amount of emery aggregate is 5KG/M²；

S7: after finishing the polishing operation, the phenomenon of disordered surface textures exists, the steel trowel is adopted to carry out ordered manual polishing and burnishing on the surface layer to eliminate the polishing textures, the modification process is completed, and after finishing the modification of the surface of the terrace, the film is adopted to cover, spray water and maintain, so that the surface layer of the terrace is prevented from cracking;

s8: after floor concrete is poured for 6 hours, expansion joints are formed, the positions of the expansion joints correspond to the axial line positions of the basement, the length of one-time cutting is 6-8 m, the cutting is performed by means of elastic line cutting in a unified mode, the cutting depth is 50mm, the width is 20mm, and the expansion joints are filled with building ointment;

s9: in order to prevent the terrace around the basement frame column from cracking, expansion joints are required to be arranged around the frame column, as shown in fig. 3; the expansion joint is cut at a position which is 300mm away from the column edge, the gas cutting width is 4mm, and the depth is 50 mm.

Further, when the erecting formwork is poured for the first time in the step S3, formwork positioning steel bars are arranged on the outer side of the battens for reinforcement, and one reinforcing steel bar is arranged at intervals of 1 meter, as shown in fig. 2; and no reinforcing steel bar is needed to be arranged when the formwork is erected in the second pouring.

Further, the strength of the concrete poured in the step S4 is not lower than C25, the water-cement ratio is as small as possible, and the concrete contains cement of more than 350kg/m3 and the water-cement ratio is less than 0.45; controlling the slump of the on-site mixed concrete to be 1-3c, and controlling the slump of the commercial concrete to be 13-15 cm; when the thickness of the concrete is more than 8cm, the concrete is poured by using common concrete, when the thickness of the concrete is less than 8cm, the concrete is required to be poured by using sandstone concrete, and the content of sandstone is not more than 1%.

Further, in the step S4, after the concrete is filled and compacted by being pulled horizontally by the insertion-type vibrating bar, the scraper is used for initially leveling, material supplementing or excess concrete is timely removed according to specific conditions, then the two ends of the long aluminum alloy scraper are tightly held at the two sides of the aluminum alloy concave bar reinforcement, the scraper is abutted against the top surface of the concave bar, concrete scraping is repeatedly performed along the length direction, material supplementing is timely performed at the concave surface, and the scraped excess concrete is timely cleaned.

Further, in the step S5, when the emery is spread for the first time, spreading should be started from the edge of the pillar, the wall, the door, and the form preferentially, the amount of the emery is two thirds of the total amount of the emery, the emery should fall down uniformly and should not be scattered randomly, the emery is smeared with a wood trowel after spreading, and after the emery is bonded with the concrete, the emery is bonded with the concrete slurry with a polishing machine.

Further, the method for determining the first emery dispensing time in the step S5 is: the operator steps on the concrete surface, and if the stepping part sinks by 4mm-6mm, the first carborundum spreading operation can be carried out.

Further, when the second spreading of the diamond grains in the step S6 is performed, the second spreading should be perpendicular to the first spreading, the second spreading amount is one third of the total spreading amount, and the troweling and polishing operation is performed immediately after the second spreading, and when the second troweling and polishing is performed, the leveling should be measured by using the guiding rule and the scraping rod, and the uneven place during the first spreading should be adjusted; and at least twice polishing, wherein the polishing machine is operated in a criss-cross manner, so that the materials are uniform and orderly, the surface flatness is ensured as much as possible during polishing operation, and surface cracking, peeling and sand blasting are avoided.

Further, the expansion joint of the frame column in the step S9 needs to be cut in place at one time, and the cutting time of the expansion joint is 6 hours after the floor concrete is poured.

Further, after 5-6 hours of construction, spraying or coating a curing agent for curing so as to prevent the surface moisture from being evaporated suddenly and ensure the stable increase of the strength of the wear-resistant material; during winter construction, a layer of plastic film and a straw bag are covered, and the maintenance time is more than 7 days.

Compared with the prior art, the invention has the beneficial effects that: the construction method of the floor in the building engineering can effectively prevent the floor from cracking and peeling, has better toughness and mechanical strength, and smooth and flat surface, can effectively reduce the later maintenance cost, and ensures the service life of the floor; the method is beneficial to controlling the surface flatness of the terrace, and can reduce or avoid cracking and the like of the large-area cast-in-place terrace caused by temperature change or concrete hardening shrinkage, thereby practically improving the construction quality of the wear-resistant terrace; the method is simple and easy to operate, reliable in quality, low in labor intensity, high in construction efficiency and beneficial to shortening the construction period.

Drawings

FIG. 1 is a schematic structural view of a bay casting of the present invention;

FIG. 2 is a schematic structural view of terrace casting according to the present invention;

fig. 3 is a schematic structural view of the frame column expansion joint cutting of the present 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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.