CN111021478B

CN111021478B - Construction method of concrete structure

Info

Publication number: CN111021478B
Application number: CN201911284696.4A
Authority: CN
Inventors: 谢立锋; 郭继成; 张吉锋
Original assignee: Chengtong Kaisheng Ecological Construction Co ltd
Current assignee: Chengtong Kaisheng Ecological Construction Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-04-02
Anticipated expiration: 2039-12-13
Also published as: CN111021478A

Abstract

The invention discloses a construction method of a concrete structure, which relates to the technical field of constructional engineering, and adopts the technical scheme that: the method comprises the following steps: step S1: manufacturing a pouring space for filling concrete; step S2: taking a pipeline, and wrapping a plastic film outside the pipeline; step S3: cement mortar is injected between the plastic films, and the cement mortar is injected at intervals at selected positions along the length direction of the pipeline; step S4: positioning the pipeline in the pouring space, and enabling two ends of the pipeline to be positioned outside the pouring space; step S5: pouring concrete into the pouring space; step S6: and solidifying the concrete into concrete solid by adopting a watering and curing mode, and finishing construction. The breakage of concrete solid is not easy to affect the pipeline, and the water leakage caused by the breakage of the pipeline is prevented; the construction method utilizes plastic film garbage, and is beneficial to environmental protection; when the concrete solid does not crack, the pipeline is installed stably enough, the raw materials of the construction method are easy to obtain, special parts do not need to be prefabricated, and the construction method is convenient to implement.

Description

Construction method of concrete structure

Technical Field

The invention relates to the technical field of constructional engineering, in particular to a construction method of a concrete structure.

Background

Concrete is the most basic material of building engineering, and refers to an artificial material prepared by mixing cement as the main cementing material, water, sand, gravel, and chemical additives and mineral admixtures as necessary in a proper proportion, uniformly stirring, compacting, molding, curing and hardening. The concrete is widely applied in the field of building engineering and can be made into walls, ceilings, floors and the like.

The pipeline is arranged in the building, the pipeline can be a drain pipe and a water supply pipe, concrete is integrally fixed with the pipeline in a mode of pouring outside the pipeline, and the pipeline can be arranged in a wall or a ceiling and a floor.

The above prior art solutions have the following drawbacks: the concrete structure is easy to crack when earthquake and foundation settlement occur or under extremely arid environment; municipal buildings beside railways are frequently subjected to vibration, and concrete structures of the municipal buildings are easy to crack. Because the concrete structure is tightly attached to the outer wall of the pipeline, the cracking of the concrete structure easily causes the pipeline to crack together, and the pipeline leaks water.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a construction method of a concrete structure, wherein the breakage of concrete solids is not easy to influence a pipeline, and water leakage caused by the breakage of the pipeline is prevented.

The technical purpose of the invention is realized by the following technical scheme: a construction method of a concrete structure comprises the following steps:

step S1: manufacturing a pouring space for filling concrete;

step S2: taking a pipeline, and wrapping a plastic film outside the pipeline;

step S3: cement mortar is injected between the plastic films, the cement mortar is injected at intervals at selected positions along the length direction of the pipeline, and cement mortar solids are formed after the cement mortar is solidified;

step S4: positioning the pipeline in the pouring space, and enabling two ends of the pipeline to be positioned outside the pouring space;

step S5: pouring concrete into the pouring space;

step S6: and solidifying the concrete into concrete solid by adopting a watering and curing mode, and finishing construction.

Through above-mentioned technical scheme, the cement mortar that pours into between the plastic film during step S3 forms the solid after solidifying, and the shape of cement mortar solid corresponds with the line shape of plastic film, and the cement mortar solid plays the effect for the plastic film reinforcement to play the supporting role between concrete solid, pipeline, the installation of pipeline is enough firm. When the concrete solid is broken, the concrete solid is limited by the laminated shape of the plastic films, and the cement mortar solid solidified between the plastic films is thin, has different thickness and width and is easy to break. After the cement mortar solid is broken, the space formed by the plastic film can be used as the moving space of the pipeline, so that the concrete solid is not easy to be broken to affect the pipeline, and water leakage caused by the broken pipeline is prevented.

Preferably, in step S1, a reinforcing cage is disposed in the casting space.

Through the technical scheme, after the steel reinforcement framework is combined with concrete, a reinforced concrete structure is formed, the strength is higher, and the concrete has higher bending resistance and crack resistance.

Preferably, after the plastic film is wrapped in the step S2, a metal mesh is wrapped outside the plastic film, and the plastic film is wrapped inside the metal mesh along the circumferential direction of the pipeline.

Through the technical scheme, the metal net has a limiting effect on the plastic film, and the plastic film is not easy to scatter outwards.

Preferably, after the metal mesh is wrapped, a plurality of through holes are formed on the plastic film by puncturing with needles, and the through holes are distributed at various positions of the plastic film.

According to the technical scheme, the through holes are punched through the plastic films of the adjacent layers, and when cement mortar is injected, the cement mortar can flow to the surrounding plastic films through the through holes; the efficiency is improved by the arrangement, the cement mortar can be distributed more uniformly, and the workload of injecting the cement mortar is reduced.

Preferably, in step S4, the pipeline is positioned by the steel reinforcement framework, and the steel reinforcement framework and the metal mesh are fixed by the metal wire.

Through the technical scheme, the pipeline is convenient to position, other positioning parts are not required to be additionally arranged, and the process of dismantling the positioning parts is omitted.

Preferably, in step S4, a plurality of layers of cement mortar are brushed on the outer surface of the metal mesh, and the cement mortar is solidified to form a mortar outer layer.

Through the technical scheme, the metal mesh and the mortar outer layer formed in the step S4 have the effects of reinforcing the inner plastic film and blocking concrete from entering, and the concrete cannot enter the plastic film to damage the structure during pouring.

Preferably, in the step S2, dry cement ash is mixed between the plastic films; in the step S3, the moisture content of the cement mortar is 50% or more.

By adopting the technical scheme, the cement mortar used in the step S3 has high moisture content and high fluidity, and is convenient to implement during injection; the injection can be carried out by a large-sized syringe or by pumping by a pump and a pipe. Because cement ash is pre-stored between the plastic films, the concentration of the cement mortar mixed with the cement ash is improved, and subsequent solidification of the cement mortar mixed with the cement ash is facilitated.

Preferably, in step S2, the plastic film is made of waste plastic film.

Through the technical scheme, the raw material of the plastic film is waste plastic film garbage, so that the waste is utilized, and the environmental problem that the white pollution is more and more serious at present is relieved.

Preferably, in step S2, the plastic film is spirally wrapped around the pipeline.

Through above-mentioned technical scheme, the plastic film steadiness that the spiral twines outside the pipeline is high, is difficult for breaking away from with the body. And step S3, solidifying cement mortar injected between the plastic films to form solids, wherein the shape of the cement mortar solids corresponds to the grain shape of the plastic films, the spirally wound plastic films can form swirl-shaped cement mortar solids, and when concrete does not crack, the cement mortar solids form a uniform supporting effect between the pipeline and the concrete, so that the pipeline is high in installation stability.

In summary, compared with the prior art, the beneficial effects of the invention are as follows:

1. the breakage of the concrete is not easy to affect the pipeline, and the water leakage caused by the breakage of the pipeline is prevented;

2. the construction method utilizes plastic film garbage, and is beneficial to environmental protection;

3. when the concrete is not cracked, the pipeline is installed stably enough;

4. the construction method has the advantages of easily obtained raw materials, no need of prefabricating special parts and convenient implementation.

Drawings

FIG. 1 is a longitudinal cross-sectional view after completion of the present construction method;

FIG. 2 is a partial view of the pipeline in steps S2 and S3 according to the embodiment;

fig. 3 is a transverse sectional view after the construction method is completed.

In the figure, 1, a space is poured; 11. a baffle plate; 2. a steel reinforcement cage; 3. a pipeline; 4. a plastic film; 5. a metal mesh; 41. through holes; 21. a metal wire; 51. an outer layer of mortar; 31. cement mortar solid; 12. concrete solids.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a method for constructing a concrete structure according to the present invention includes the following steps:

step S1: a casting space 1 for filling concrete is manufactured. The concrete of this embodiment is used for forming the floor layer, then pours space 1 and adopts the mode of headspace to form, pours the available baffle 11 of 1 all around and encloses.

Set up framework of steel reinforcement 2 in pouring space 1, framework of steel reinforcement 2 is formed by welding of steel reinforcement, iron wire winding combination, and framework of steel reinforcement 2 is located pouring space 1 completely for form reinforced concrete structure.

Step S2: taking the pipeline 3, and wrapping the pipeline 3 with a plastic film 4. The pipeline 3 can be any plastic pipe or metal pipe, and the plastic film 4 is made of waste plastic film garbage and has the function of waste utilization. After the plastic film 4 is properly crushed, the plastic film 4 is spirally wrapped outside the pipeline 3, and before the wrapping, dry cement ash is mixed in the plastic film 4.

Then wrap up metal mesh 5 outside plastic film 4, metal mesh 5 wraps up plastic film 4 in along pipeline 3 circumference, and metal mesh 5 wraps up the mode fastening with the iron wire winding after accomplishing. The metal net 5 has a limiting effect on the plastic film 4, and the plastic film 4 is not easy to scatter outwards. A plurality of through holes 41 are formed on the plastic film 4 by puncturing with needles, the through holes 41 are distributed at various positions of the plastic film 4, and the needles can conveniently penetrate through the mesh gaps of the metal mesh 5.

Step S3: cement mortar is injected between the plastic films 4, and the cement mortar is injected at intervals at selected positions along the length direction of the pipeline 3; the cement mortar is prepared from cement, fine sand, lime and water, and the water content of the cement mortar used in the step is more than 50 percent (by weight), so the concentration of the cement mortar is lower. The cement mortar is injected by a large injector or a pump and a pipe; in step S2, a metal net 5 having a large mesh size is selected so that a pipe for cementing can pass through the metal net 5.

The amount of cement mortar injected is only required to be in a state of wetting the plastic film 4, so that cement mortar can be in contact with cement ash between the plastic film 4. When cement mortar is injected, the injection amount of each time is controlled, and the cement mortar is prevented from dripping out of the plastic film 4 to cause waste. The cement mortar has high water content, so that the fluidity is good, and the injection process is convenient to implement.

Step S4: the pipeline 3 is positioned in the casting space 1, so that two ends of the pipeline 3 are positioned outside the casting space 1. The pipeline is positioned through the steel reinforcement framework 2, and the steel reinforcement framework 2 and the metal mesh 5 are fixed through the metal wire 21. Brushing a plurality of layers of cement mortar on the outer surface of the metal mesh 5, and waiting for the cement mortar to solidify to form a mortar outer layer 51. The cement mortar in the step adopts a normal water distribution ratio, namely the water content is about 13%, and the cement mortar in the step is in a semisolid state before solidification.

Step S5: and (3) pouring concrete into the pouring space 1, filling the space outside the metal mesh 5 and the steel reinforcement framework 2 with the concrete, and leveling the top surface of the concrete. The metal mesh 5 and the mortar outer layer 51 formed in step S4 have the effect of reinforcing the inner plastic film 4 and blocking the entry of concrete, so that the concrete does not enter between the plastic films 4 during casting and the structure is not damaged.

Step S6: the concrete is solidified into concrete solid 12 by adopting a watering maintenance mode, and watering is carried out for multiple times in multiple days to finish the construction of the concrete structure.

Referring to fig. 3, according to the construction method, cement mortar solid 31 is formed after cement mortar injected between plastic films 4 is solidified in step S3, the cement mortar solid 31 is in a thin layer shape, the shape of the cement mortar solid 31 corresponds to the grain shape of the plastic film 4, the cement mortar solid 31 has the effect of reinforcing the plastic film 4, and has a supporting effect between the concrete solid 12 and the pipeline 3, and the pipeline 3 is installed stably enough. The combination of the multi-layer plastic film 4 and the cement mortar solid 31 can ensure sealing and prevent air and water from circulating through the plastic film 4.

When the concrete solid 12 is broken, the thickness of the cement mortar solid 31 solidified between the plastic films 4 is small, and the thickness and the width are not uniform, so that the concrete solid is easily broken due to the laminated shape of the plastic films 4. After the cement mortar solid 31 is broken, the space formed by the plastic film 4 can be the moving space of the pipeline 3, so that the breakage of the concrete solid 12 is not easy to affect the pipeline 3, and the water leakage caused by the breakage of the pipeline 3 is prevented.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A construction method of a concrete structure is characterized in that: the method comprises the following steps:

step S1: manufacturing a casting space (1) for filling concrete;

step S2: taking the pipeline (3), and wrapping a plastic film (4) outside the pipeline (3);

step S3: cement mortar is injected between the plastic films (4), the cement mortar is injected at intervals at selected positions along the length direction of the pipeline (3), and cement mortar solids (31) are formed after the cement mortar is solidified;

step S4: positioning the pipeline (3) in the pouring space (1) to enable two ends of the pipeline (3) to be positioned outside the pouring space (1);

step S5: pouring concrete into the pouring space (1);

step S6: solidifying the concrete into concrete solid (12) by adopting a watering and curing mode to finish construction;

in the step S2, dry cement ash is mixed between the plastic films (4), and the plastic films (4) are spirally wrapped outside the pipeline (3); in the step S3, the moisture content of the cement mortar is more than 50%; in the step S4, a plurality of layers of cement mortar are brushed on the outer surface of the pipeline (3), the cement mortar is solidified to form a mortar outer layer (51), and the moisture content of the cement mortar brushed in the step S4 is 13%.

2. The method of constructing a concrete structure according to claim 1, wherein: and in the step S1, arranging a steel reinforcement framework (2) in the pouring space (1).

3. The method of constructing a concrete structure according to claim 2, wherein: and after the plastic film (4) is wrapped in the step S2, wrapping a metal net (5) outside the plastic film (4), wherein the plastic film (4) is wrapped inside the metal net (5) along the circumferential direction of the pipeline (3).

4. A method of constructing a concrete structure according to claim 3, wherein: after the metal net (5) is wrapped, a plurality of through holes (41) are formed on the plastic film (4) in a puncturing mode through needles, and the through holes (41) are distributed on all positions of the plastic film (4).

5. A method of constructing a concrete structure according to claim 3, wherein: in the step S4, the pipeline is positioned through the steel bar framework (2), and the steel bar framework (2) and the metal net (5) are fixed through the metal wire (21).

6. The method of constructing a concrete structure according to claim 1, wherein: in the step S2, the plastic film (4) is made of waste plastic film waste.