CN111778853B - Inner cavity template recycling construction method for concrete structure with closed inner cavity - Google Patents
Inner cavity template recycling construction method for concrete structure with closed inner cavity Download PDFInfo
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- CN111778853B CN111778853B CN201910273635.1A CN201910273635A CN111778853B CN 111778853 B CN111778853 B CN 111778853B CN 201910273635 A CN201910273635 A CN 201910273635A CN 111778853 B CN111778853 B CN 111778853B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a recycling construction method of an inner cavity template with a closed inner cavity concrete structure, which comprises the following steps of installing an inner cavity net-shaped memory metal template to be supported into a whole piece, and sticking demoulding paper on the net-shaped memory metal template; the claw-shaped hollow support rod is abutted and connected with each node of the net-shaped memory metal template, and whether the electric heater and the circuit thereof are normal is checked; binding steel bars, installing a peripheral common template and pouring concrete; after the concrete is condensed, the electric heater switch is turned on, and the reticular memory metal template is heated and contracted into the claw-shaped hollow supporting rod; the claw-shaped hollow support rod is drawn out, and the reticular memory metal template is taken out and cleaned for next use. The construction method for recycling the inner cavity template with the closed inner cavity concrete structure is scientific and reasonable in design, can recycle the inner template and the supporting structure, reduces electrochemical corrosion caused by manual template binding, greatly reduces the cost, is green and environment-friendly, and is worthy of popularization.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a recycling construction method of an inner cavity template with a closed inner cavity concrete structure, which is low in cost and environment-friendly.
Background
The box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-place box girder. The box girder prefabricated in the independent site can be erected after the lower project is finished by combining the bridge girder erection machine, so that the project progress can be accelerated, and the construction period can be saved; cast-in-place box girders are mostly used for large continuous bridges. The common materials are divided into two types, namely a prestressed reinforced concrete box girder and a steel box girder. The prestressed reinforced concrete box girder is constructed on site, and transverse prestress is also arranged in some cases besides longitudinal prestress; the steel box girder is generally processed in a factory and then transported to a site for installation, and has an all-steel structure and a partially reinforced concrete pavement layer
At present, most of steel box girders are in a through opening type, such steel box girders need a large amount of steel bars and steel plates and limit the length of the steel box girders, if closed type steel box girders or semi-closed type steel box girders are adopted, the length and the width of the steel box girders can be greatly increased, and the problem that the length of the box girders of 4 lanes is long because the box girders must be prestressed reinforced concrete box girders is solved. However, closed building concrete has the following disadvantages: 1. the internal building templates cannot be recycled, so that serious pollution and resource waste are caused; 2. the interior can not be detected and maintained; 3. is susceptible to electrochemical corrosion and the like.
Disclosure of Invention
The invention aims to provide a recycling construction method of an inner cavity template with a closed inner cavity concrete structure, which is low in cost and environment-friendly.
In order to overcome the defects in the prior art, the invention adopts the following technical scheme:
a recycling construction method of an inner cavity template with a closed inner cavity concrete structure comprises the following steps,
1) mounting a net-shaped memory metal template in an inner cavity, supporting the net-shaped memory metal template into a whole piece, and sticking demolding paper on the net-shaped memory metal template;
2) the claw-shaped hollow support rod is abutted and connected with each node of the net-shaped memory metal template, and whether the electric heater and the circuit thereof are normal is checked;
3) binding steel bars, installing a peripheral common template and pouring concrete;
4) after the concrete is condensed, the electric heater switch is turned on, and the reticular memory metal template is heated and contracted into the claw-shaped hollow supporting rod;
5) the claw-shaped hollow support rod is drawn out, and the reticular memory metal template is taken out and cleaned for next use.
Specifically, the practical memory metal as the template has the defect of high price in the industry, but under the condition of excessive tests and improvements, the method disclosed by the invention is equivalent to the cost of resource waste caused by the fact that the common template used in actual construction cannot be recycled after 5 times of continuous recycling of the cavity template. But also solves the problem of corrosion of the common template which can not be recycled to the concrete.
Further, the step 1) of attaching the release paper comprises the following steps: firstly, sticking perforated hard waterproof paper, wherein the perforated hard waterproof paper solves the problem that the connection time or the reached strength of the inner cavity concrete and the outer side concrete is different due to no water seepage of the template, then sticking fiber paper, sticking common paper soaked with an oily release agent, and finally spraying release powder on the common paper to enable the release paper inside to completely fall off after the net-shaped memory metal template is loosened, and then taking out the release paper by using a hook.
Further, a plurality of sections of controllable hinges are arranged on the claw-shaped hollow supporting rod in the step 2), the controllable hinges are used for folding the claw-shaped hollow supporting rod, and the principle of the controllable hinges is the same as that of a tripod for a camera in the prior art.
Furthermore, the controllable hinge is connected with a tubular clamping jaw of the claw-shaped hollow supporting rod, the tubular clamping jaw is in top contact with the reticular memory metal template, and the top end of the tubular clamping jaw is provided with a heating head of the electric heater.
Furthermore, each node of the reticular memory metal template is provided with a semicircular cover cap which is in abutting contact with the heating head. The mesh-shaped memory metal template is heated by the heat transfer of the heating head to be contracted into the tubular claws.
Further, the time for pouring the concrete in the step 3) is controlled to be 15-60 minutes.
Further, the time for turning on the electric heater in the step 4) is 5-15 minutes, a pressure sensor of the net-shaped memory metal template is arranged in the claw-shaped hollow supporting rod, and when the net-shaped memory metal template is completely contracted into the claw-shaped hollow supporting rod, the pressure sensor controls the electric heater to be turned off.
Further, the size of the mesh-shaped memory metal template is 0.3-0.6 square meter. The area is just favorable to the netted memory metal template to contract to the claw shape hollow support pole after the memory warp and take in, also provides sufficient support intensity when concreting.
Further, the method for cleaning the mesh-shaped memory metal template comprises the following steps: a. cleaning the aerator pipe in a normal-temperature cleaning solution; b. putting the mixture into a high-temperature cleaning solution for 1 to 3 minutes, and taking out the mixture; c. and (c) circulating a, taking out and airing.
The construction method for recycling the inner cavity template with the closed inner cavity concrete structure is scientific and reasonable in design, can recycle the inner template and the supporting structure, reduces electrochemical corrosion caused by manual template binding, greatly reduces the cost, is green and environment-friendly, and is worthy of popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise:
FIG. 1 is a schematic view of an embodiment of a method for recycling an inner cavity form of a concrete structure with a closed inner cavity according to the present invention;
FIG. 2 is a schematic structural view illustrating a construction method for recovering an inner cavity form having a closed inner cavity concrete structure;
FIG. 3 is a schematic view showing the construction of a release paper for the cavity form recycling method of a concrete structure having a closed cavity;
in the drawings: 1-release paper; 2-a mesh memory metal template; 3-claw-shaped hollow support rods; 4-a heating device; 11-hard waterproof paper with holes; 12-fiber paper; 13-plain paper; 31-a pressure sensor; 32-a controllable hinge; 41-electric heater.
Detailed Description
The present invention will be described in detail with reference to the drawings and specific embodiments, which are illustrative of the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1 and 2, a cavity form recycling construction method of a concrete structure having a closed cavity includes the steps of,
1) mounting a net-shaped memory metal template in an inner cavity, supporting the net-shaped memory metal template into a whole piece, and sticking demolding paper on the net-shaped memory metal template;
2) the claw-shaped hollow supporting rod is in top contact with and connected with each node of the net-shaped memory metal template, a plurality of sections of controllable hinges are arranged on the claw-shaped hollow supporting rod and used for folding the claw-shaped hollow supporting rod, and the principle of the controllable hinges is the same as that of the hinges of the tripod for the camera in the prior art; checking whether the electric heater and the circuit thereof are normal;
3) binding steel bars, installing a peripheral common template and pouring concrete;
4) after the concrete is condensed, a switch of the electric heater is turned on, the controllable hinge is connected with the tubular clamping jaw of the jaw-shaped hollow supporting rod, the tubular clamping jaw is abutted to the reticular memory metal template, and the top end of the tubular clamping jaw is provided with a heating head of the electric heater. Each node of the net-shaped memory metal template is provided with a semicircular cover cap which is in abutting contact with the heating head. The mesh-shaped memory metal template is heated by the heat transfer of the heating head to be contracted into the tubular claws. The reticular memory metal template is heated and contracted into the claw-shaped hollow supporting rod; the time for turning on the electric heater is 5-15 minutes, a pressure sensor of the reticular memory metal template is arranged in the claw-shaped hollow supporting rod, and when the reticular memory metal template is completely contracted into the claw-shaped hollow supporting rod, the pressure sensor controls the electric heater to be turned off.
5) The claw-shaped hollow support rod is drawn out, and the reticular memory metal template is taken out and cleaned for next use.
Specifically, practical memory metal as a template has the defect of high price in the building industry, but under the condition of excessive tests and improvements, the method disclosed by the invention is equivalent to the cost of resource waste caused by the fact that an ordinary template used in actual construction cannot be recycled after 5 times of continuous recycling of the cavity template. But also solves the problem of corrosion of the common template which can not be recycled to the concrete. Not only can be used on the box girder, but also can be a small and exquisite assembled sealed pool, a punching type test assembly room and the like
In some embodiments, the order of applying the release paper in step 1) is: firstly, sticking perforated hard waterproof paper, wherein the perforated hard waterproof paper solves the problem that the connection time or the reached strength of the inner cavity concrete and the outer side concrete is different due to no water seepage of the template, then sticking fiber paper, sticking common paper soaked with an oily release agent, and finally spraying release powder on the common paper to enable the release paper inside to completely fall off after the net-shaped memory metal template is loosened, and then taking out the release paper by using a hook.
Specifically, the time for pouring the concrete in the step 3) is controlled to be 15-60 minutes.
Specifically, the size of the mesh-shaped memory metal template is 0.3-0.6 square meter. The area is just favorable to the netted memory metal template to contract to the claw shape hollow support pole after the memory warp and take in, also provides sufficient support intensity when concreting.
In some embodiments, the method for cleaning the mesh-shaped memory metal template comprises the following steps: a. cleaning the aerator pipe in a normal-temperature cleaning solution; b. putting the mixture into a high-temperature cleaning solution for 1 to 3 minutes, and taking out the mixture; c. and (c) circulating a, taking out and airing.
Specifically, the specific structure of the cavity template and the support rod of the invention is as follows: the inner cavity template consists of release paper 1 and a reticular memory metal template 2; the support rod consists of a claw-shaped hollow support rod 3 and a heating device 4. The heating means 4 is provided with an electric heater 41, and a heating tip of the electric heater 41 is brought into contact with a semicircular cap of the net-shaped memory metal mold plate 2 and is connected to the inside of the claw-shaped hollow support rod 3. The pressure sensor 31 is located inside the claw-shaped hollow support rod 3, when the reticular memory metal template 2 retracts into the inside, the pressure sensor 31 can be pressed against the reticular memory metal template 2, so that the electric heater 41 stops working to protect the reticular memory metal template 2 from being damaged due to overheating, the controllable hinge 32 is arranged on the claw-shaped hollow support rod 3, the claw-shaped hollow support rod 3 is extended by a long length by the controllable hinge 32, and the space is saved by folding the claw-shaped hollow support rod 3 for recycling.
Further, the release paper 1 is composed of a hard waterproof paper 11 with holes, a fiber paper 12 and a plain paper 13, the plain paper is sprayed with a release powder, and the hard waterproof paper 11 with holes is contacted with the mesh-shaped memory metal template (as shown in fig. 3).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A recycling construction method of an inner cavity template with a closed inner cavity concrete structure is characterized in that: comprises the following steps of (a) carrying out,
1) mounting a net-shaped memory metal template in an inner cavity, supporting the net-shaped memory metal template into a whole piece, and sticking demolding paper on the net-shaped memory metal template;
2) the claw-shaped hollow support rod is abutted and connected with each node of the net-shaped memory metal template, and whether the electric heater and the circuit thereof are normal is checked;
3) binding steel bars, installing a peripheral common template and pouring concrete;
4) after the concrete is condensed, the electric heater switch is turned on, and the reticular memory metal template is heated and contracted into the claw-shaped hollow supporting rod;
5) the claw-shaped hollow support rod is drawn out, and the reticular memory metal template is taken out and cleaned for next use;
in the step 2), a plurality of sections of controllable hinges are arranged on the claw-shaped hollow supporting rod, and the controllable hinges are used for folding the claw-shaped hollow supporting rod;
the controllable hinge is connected with the tubular clamping jaw of the jaw-shaped hollow supporting rod, the tubular clamping jaw is in top contact with the reticular memory metal template, and the top end of the tubular clamping jaw is provided with a heating head of the electric heater;
each node of the net-shaped memory metal template is provided with a semicircular cover cap which is in abutting contact with the heating head.
2. The recycling method of inner cavity form with closed inner cavity concrete structure as claimed in claim 1, wherein:
the step 1) of sticking the demoulding paper comprises the steps of sticking the hard waterproof paper with holes, sticking the fiber paper, sticking the common paper soaked with the oily demoulding agent and spraying demoulding powder on the common paper.
3. The recycling method of inner cavity form with closed inner cavity concrete structure as claimed in claim 1, wherein:
the time for pouring the concrete in the step 3) is controlled to be 15-60 minutes.
4. The recycling method of inner cavity form with closed inner cavity concrete structure as claimed in claim 1, wherein:
and 4) turning on the electric heater for 5-15 minutes, arranging a pressure sensor of the net-shaped memory metal template in the claw-shaped hollow support rod, and controlling the electric heater to be turned off by the pressure sensor when the net-shaped memory metal template is completely contracted into the claw-shaped hollow support rod.
5. The recycling method of inner cavity form with closed inner cavity concrete structure as claimed in claim 1, wherein:
the size of the net-shaped memory metal template is 0.3-0.6 square meter.
6. The recycling method of inner cavity form with closed inner cavity concrete structure as claimed in claim 1, wherein:
the method for cleaning the mesh memory metal template comprises the following steps: a. cleaning the aerator pipe in a normal-temperature cleaning solution; b. putting the mixture into high-temperature cleaning solution for 1 to 3 minutes, and taking out the mixture; c. and (c) circulating a, taking out and airing.
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| CN201910273635.1A CN111778853B (en) | 2019-04-06 | 2019-04-06 | Inner cavity template recycling construction method for concrete structure with closed inner cavity |
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| CN201910273635.1A CN111778853B (en) | 2019-04-06 | 2019-04-06 | Inner cavity template recycling construction method for concrete structure with closed inner cavity |
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| CN111778853B true CN111778853B (en) | 2022-04-12 |
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| JP2002283025A (en) * | 2001-03-22 | 2002-10-02 | Kurimoto Ltd | Iron-base shape memory alloy tube and its production method |
| CN201264291Y (en) * | 2008-06-02 | 2009-07-01 | 宋国民 | Automatic deploying and retracting internal mold of prefabricated box girder |
| CN101302739A (en) * | 2008-07-10 | 2008-11-12 | 中铁大桥局股份有限公司 | Prestress concrete box girder hydraulic internal mold vehicle as well as hydraulic internal mold system |
| CN105378129A (en) * | 2013-04-08 | 2016-03-02 | Re-Fer股份公司 | Method for building prestressed concrete structures by means of profiles consisting of a shape-memory alloy, and structure produced using said method |
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| CN104806022A (en) * | 2015-04-02 | 2015-07-29 | 徐州工程学院 | Prestressed concrete constructing process for curved shape memory alloy tendon |
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