CN114135077A

CN114135077A - Concrete super-building reset cutting floor construction method free of warehouse dividing strip structure

Info

Publication number: CN114135077A
Application number: CN202111313061.XA
Authority: CN
Inventors: 宋千军; 苏杨; 周娜娜; 郑鹏; 向晓红
Original assignee: Sixth Construction Co Ltd of China Construction Fourth Engineering Division Co Ltd
Current assignee: Sixth Construction Co Ltd of China Construction Fourth Engineering Division Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-03-04

Abstract

A concrete super-construction reset cutting floor construction method free of a warehouse dividing strip structure comprises the following steps: 1) establishing a bin division diagram; 2) binding floor steel bars; 3) according to a bin dividing diagram, arranging a steel wire mesh for blocking outside a bin dividing joint of a first pouring block, wherein the distance between the steel wire mesh and the bin dividing joint meets the requirement that the strength of concrete at the bin dividing joint is the same as the strength of a central area of the first pouring block after pouring; 4) carrying out concrete pouring and leveling on blocks surrounded by the steel wire meshes, and maintaining until the concrete strength of the first poured blocks reaches over 75%; 5) cutting the surface of the concrete along the parting line, and removing the concrete of the super-building part; 6) and (3) after the block concrete is firstly poured and cured for 7 days, carrying out concrete surface grout receiving treatment on the block concrete, repeating the steps, and carrying out adjacent warehouse construction until the concrete pouring of the whole terrace is completed. The construction method of the invention has the advantages of high strength of the joint of the bin layer and straight and beautiful slit of the bin.

Description

Concrete super-building reset cutting floor construction method free of warehouse dividing strip structure

Technical Field

The invention relates to the field of construction of large-area cement concrete floors without decorative finish coats, in particular to a construction method of an engineering floor with high requirements on floor quality such as strength, flatness and levelness.

Background

Along with the country to industry and infrastructure's input increase, buildings such as parking area, supermarket, logistics storage and factory building constantly emerge, because above-mentioned ground individual layer area is big, and often bear the effect of dynamic load such as car, transportation machinery, hoist and mount machinery in the use, very easily cause wearing and tearing and destruction, consequently compare traditional secondary and pour the terrace way, intensity is higher, should not hollowly rise, the better concrete base layer of shaping and the better structure terrace of surface course one shot forming jump storehouse construction technology obtain widelys popularize in this type of ground engineering.

The conventional structural terrace is constructed by jumping the bin, the bin dividing seams are not smooth and straight, concrete aggregate at the bin dividing seams is concentrated, the concrete is loose, the connection of new and old concrete is obvious, the conditions of water seepage and water leakage are easy to occur along the seams, or bin dividing strips such as angle steel, channel steel and the like which are large in pre-buried strength and do not need to be dismantled at the bin dividing positions are adopted, the bin dividing seams can be guaranteed to be smooth and straight, but the bin dividing strips are easy to rust, expose and are not attractive. And these methods can not avoid the low concrete intensity of piecemeal seam position, and the shaping is poor, needs secondary to polish to guarantee problems such as roughness.

Disclosure of Invention

The invention aims to provide a warehouse dividing construction method of a large-scale terrace, which can avoid warehouse dividing strips, improve the smoothness of warehouse dividing seams, enable concrete poured in each warehouse to be connected seamlessly, and improve the strength and the attractiveness of the terrace.

In order to solve the technical problems, the technical scheme provided by the invention is a concrete super-construction restoration-cutting-free separate-bin-strip-structure terrace construction method, which comprises the following steps: 1) establishing a bin division diagram; 2) binding floor steel bars; 3) according to the bin dividing map, determining a first pouring block, arranging a steel wire mesh for blocking outside a bin dividing joint of the first pouring block, wherein after the distance between the steel wire mesh and the bin dividing joint meets the requirement of concrete pouring, the concrete strength of the bin dividing joint is the same as the strength of the central area of the first pouring block; 4) concrete pouring is carried out on blocks surrounded by the steel wire meshes, and the concrete is maintained until the concrete strength of the first poured blocks reaches over 75 percent; 5) firstly, pouring block compartment seam elastic lines, cutting the surface of concrete along the compartment seam elastic lines, and removing the super-building part of concrete outside the compartment seams; 6) and (3) after the block concrete is firstly poured and cured for 7 days, carrying out concrete surface grout receiving treatment on the block concrete, repeating the steps, and carrying out adjacent warehouse construction until the concrete pouring of the whole terrace is completed.

Preferably, in the step 3), the distance between the intercepted steel wire mesh and the bin dividing seam is 20 cm.

Preferably, in the step 3), the aperture of the intercepting steel wire mesh is less than or equal to 5 mm.

Preferably, in the step 4), after the concrete is poured, the large surface is leveled by adopting a laser leveling instrument, and then secondary leveling is carried out by adopting a scraper bar matched with a sweeping instrument.

Preferably, the hardening agent is spread and polished when the block concrete is initially set, and the hardening agent is spread and polished for the second time after the super-building concrete is cut.

Preferably, in the step 5), the cutting depth of the surface of the bin dividing seam is 1.5 cm.

Preferably, in the step 6), the slurry receiving treatment is performed by using the plain cement.

Preferably, in step 6), the surface flatness of two adjacent sub-bins does not exceed 2 mm.

The terrace construction method provided by the invention overcomes the problem of difficulty in treatment of construction joints in the existing terrace warehouse dividing method, does not need warehouse dividing strips, and can realize good flatness of joints, high concrete strength, and straight, flat and beautiful warehouse dividing joints. Through adopting the super-building part, the distance between the bin dividing joint and the pouring edge is kept to be 20cm, the insufficient strength of the bin dividing joint in the pouring edge is avoided, and the strength of the joint is improved.

Drawings

Fig. 1 is a schematic view of a three-dimensional structure of concrete of a first pouring block and a super-pouring part after warehouse-divided pouring.

Fig. 2 is a side view schematic of the structure of fig. 1.

Fig. 3 is a schematic structural diagram of two adjacent separated bins after pouring and cutting.

Detailed Description

With respect to the above technical solutions, preferred embodiments are described in detail with reference to the drawings.

As shown in fig. 1 and 2, floor warehouse division and pouring sequence are determined to manufacture warehouse division diagrams, floor reinforcing steel bars 1 are bound according to design drawings, and the reinforcing steel bars are in a continuous binding mode without cutting. Then according to a bin dividing diagram, a steel wire mesh 2 for blocking is vertically fixed on the terrace steel bar 1 at the position 20cm outside the bin dividing seam 3 of the first pouring block 4, and the aperture of the steel wire mesh 2 is less than or equal to 5 mm.

And after the steel wire mesh 2 is fixed, concrete pouring is carried out, and after the large surface is leveled by adopting a laser leveling instrument in the pouring process, secondary leveling is carried out by adopting a 2m aluminum alloy scraper to be matched with a leveling instrument. And forming concrete of the block 4 and concrete of the super building part 5 positioned outside the warehouse dividing joint.

When the concrete strength of the block 4 poured firstly reaches over 75 percent of the design strength, elastic lines are arranged at the positions of the bin dividing joints 3, a pavement cutter is adopted to cut the surfaces of the bin dividing joints by 1.5cm according to the elastic lines, the bin dividing joints on the surface of the concrete are kept straight, then the residual concrete of the super-construction part is chiseled by an air pick, and only the concrete of the block 4 poured firstly is left. And during initial setting, firstly spreading a hardening agent on the first pouring block 4 and polishing, and after the super-pouring part concrete is cut, then spreading a hardening agent on the first pouring block 4 and polishing.

As shown in fig. 1, after the concrete of the block 4 is cured for 7 days, the chiseled concrete is cleaned, and the concrete surface is subjected to slurry receiving treatment and then is poured in adjacent bins. Adopting the plain cement to carry out slurry receiving treatment. The pouring of the adjacent sub-bins adopts a sub-bin pouring method of pouring the block 4 firstly, referring to fig. 3, when the concrete pouring of the adjacent sub-bins 6 is finished for about 4-5 hours and basically set initially, the flatness of the joint part is rechecked again, when the flatness difference is large, a troweling machine is adopted to trowel again, the flatness of the floor surfaces at the two sides of the joint part is ensured not to exceed 2mm, and the two adjacent bins form a whole and are connected seamlessly. And repeating the bin-divided pouring method until the floor concrete is completely poured.

Claims

1. A concrete super-construction reset cutting floor construction method free of a warehouse dividing strip structure comprises the following steps: 1) establishing a bin division diagram; 2) binding floor steel bars; 3) according to the bin dividing map, determining a first pouring block, arranging a steel wire mesh for blocking outside a bin dividing joint of the first pouring block, wherein after the distance between the steel wire mesh and the bin dividing joint meets the requirement of concrete pouring, the concrete strength of the bin dividing joint is the same as the strength of the central area of the first pouring block; 4) concrete pouring is carried out on blocks surrounded by the steel wire meshes, and the concrete is maintained until the concrete strength of the first poured blocks reaches over 75 percent; 5) firstly, pouring block compartment seam elastic lines, cutting the surface of concrete along the compartment seam elastic lines, and removing the super-building part of concrete outside the compartment seams; 6) and (3) after the block concrete is firstly poured and cured for 7 days, carrying out concrete surface grout receiving treatment on the block concrete, repeating the steps, and carrying out adjacent warehouse construction until the concrete pouring of the whole terrace is completed.

2. The construction method according to claim 1, wherein in the step 3), the steel wire mesh is 20cm away from the bin dividing seam.

3. The construction method according to claim 1, wherein in the step 3), the aperture of the steel wire mesh is less than or equal to 5 mm.

4. The construction method according to claim 1, wherein in the step 4), after the concrete is poured, the large surface is leveled by a laser leveling instrument, and then secondary leveling is carried out by a scraper and a sweep leveling instrument.

5. The construction method according to claim 4, wherein in the step 4), the hardening agent is spread and polished when the block concrete is initially set, and the hardening agent is spread and polished for a second time after the super-building concrete is cut.

6. The construction method according to claim 1, wherein in the step 5), the surface cutting depth of the bin dividing seam is 1.5 cm.

7. The construction method according to claim 1, wherein in step 6), the cement slurry is joined by using a cement slurry.

8. The construction method according to claim 1, wherein in step 6), the surface flatness of two adjacent sub-chambers does not exceed 2 mm.