CN212224694U - A insulation construction for concrete structure winter construction - Google Patents
A insulation construction for concrete structure winter construction Download PDFInfo
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- CN212224694U CN212224694U CN202020441834.7U CN202020441834U CN212224694U CN 212224694 U CN212224694 U CN 212224694U CN 202020441834 U CN202020441834 U CN 202020441834U CN 212224694 U CN212224694 U CN 212224694U
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Abstract
The utility model belongs to the technical field of concrete structure construction technique and specifically relates to a insulation construction for concrete structure winter construction, its characterized in that: the insulation construction includes: after the concrete structure is poured, a plastic film laid on the surface of the concrete structure and a quilt heat-insulating layer covered on the surface of the plastic film are paved; before the middle plate and the top plate of the concrete structure are poured, a heat insulation curtain arranged at the end part of the concrete structure and a hot air curtain arranged below the pouring part are hung; the fireproof curtain is arranged on a template support of the side wall of the concrete structure before the side wall of the concrete structure is poured, and the hot air curtain is arranged below the fireproof curtain. The utility model has the advantages that: the heat insulation effect of the concrete structure constructed in winter can be improved; simple and reasonable structure, convenient use, convenient disassembly and assembly, recycle and suitability for popularization.
Description
Technical Field
The utility model belongs to the technical field of concrete structure construction technique and specifically relates to a insulation construction for concrete structure winter construction.
Background
The selection of the winter construction scheme is mainly the selection of concrete curing measures, and at present, the following main methods are mainly used for concrete construction and curing.
And (3) maintenance by a heat storage method: after the concrete is poured, the heat of raw material heating and cement hydration heat is utilized, and the concrete cooling is delayed through proper heat preservation, so that the concrete reaches the expected strength before being cooled to 0 ℃. The heat storage method is simple in construction, no external heat source is needed for concrete curing, and the winter application cost is low, so that the heat storage method is preferably adopted during winter construction. Other methods are adopted only when the thermal calculation requirements are not easily met technically or the construction period is urgent. In the period that the average daily temperature is-10 ℃ and the lowest daily temperature is not lower than-15 ℃ in the early winter or early spring, the surface coefficient of the concrete is not more than 5 or the structure below the ground is suitable for construction by adopting a heat storage method.
Curing by a steam method: for concrete engineering with large surface coefficient, short curing time and high early strength requirement, or when the natural temperature is low and the technology is difficult, the newly poured concrete can be cured by a steam curing process. The steam is a good heat carrier, releases large heat during condensation, has a high heat release coefficient, can be heated to harden the concrete at a high temperature, and can supply certain moisture to prevent the surface of the concrete from being dried and dehydrated due to excessive evaporation of the moisture. It is technically more complicated than short-time heating; the strength of the concrete can be increased according to the requirement to achieve the form removal or load bearing strength, which is a rapid damp-heat curing method, but the equipment investment is large, and the manpower and material resources are consumed greatly.
Maintaining by a greenhouse method: the greenhouse is erected around the building or the member, the air in the greenhouse is kept at a normal temperature through manual heating, and the pouring and the maintenance of the concrete are carried out in the greenhouse. The construction operation is not different from the normal temperature, the labor condition is better, and the working efficiency is higher. Meanwhile, the quality of the concrete is reliably guaranteed, and freezing damage is not easy to occur. The building of the greenhouse needs a large amount of materials and manpower, heat supply needs a large amount of energy, and the strength of concrete is slowly increased.
Curing by an additive method: the admixture is added into the concrete constructed in winter to reduce the liquid phase freezing point in the concrete and ensure that the cement can be continuously hydrated under the condition of negative temperature, so that the concrete can reach the critical strength of freezing injury resistance under the condition of negative temperature. The admixture mixing method is often applied together with the heat storage method to fully utilize the initial heat of the concrete and the heat released by the cement in the hydration process, and accelerate the increase of the concrete strength. But more additives need to be paid during maintenance, the cost is higher, and the additive mixing amount needs to be additionally calculated.
That is, the above-mentioned conventional construction schemes have respective problems.
Disclosure of Invention
The utility model aims at providing a heat preservation structure for concrete structure winter construction according to above-mentioned prior art not enough, through utilizing hot-blast curtain and corresponding heat preservation separation and external heat in turn at each position of concrete structure to realize concrete structure's heat preservation.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
the utility model provides a heat preservation structure for concrete structure winter construction for carry out heat preservation maintenance to the concrete structure of the subway station main part of being under construction at winter, its characterized in that: the insulation construction includes: after the concrete structure is poured, a plastic film laid on the surface of the concrete structure and a quilt heat-insulating layer covered on the surface of the plastic film are paved; before the middle plate and the top plate of the concrete structure are poured, a heat insulation curtain arranged at the end part of the concrete structure and a hot air curtain arranged below the pouring part are hung; the fireproof curtain is arranged on a template support of the side wall of the concrete structure before the side wall of the concrete structure is poured, and the hot air curtain is arranged below the fireproof curtain.
The middle plate and the top plate are provided with steel supports, plastic cloth and cotton curtains are arranged on the steel supports, and hot air curtains are arranged on one sides of the steel supports.
The heat insulation structure further comprises a cotton quilt heat insulation layer on the top of the steel bar after the side wall is poured.
The utility model has the advantages that: the heat insulation effect of the concrete structure constructed in winter can be improved; simple and reasonable structure, convenient use, convenient disassembly and assembly, recycle and suitability for popularization.
Drawings
Fig. 1 is a plan view of the structural arrangement of the present invention;
FIG. 2 is a sectional view of the structure of the present invention;
FIG. 3 is a schematic view of the reinforced heat preservation of the present invention;
fig. 4 is a vertical view of the heat insulation structure of the middle side wall of the utility model.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-4, the symbols 1-10 in the figures are respectively expressed as: concrete structure 1, heat preservation curtain 2, hot-blast curtain 3, plastic film and cotton-wadded quilt heat preservation 4, steel shotcrete 5, plastic sheet and cotton-wadded curtain 6, side wall 7, cotton-wadded quilt heat preservation 8, fire prevention cotton-wadded curtain 9, flitch presser foot 10.
Example (b): the heat preservation structure for the concrete structure construction in the winter period in the embodiment is used for preserving heat and maintaining the concrete structure of the subway station main body constructed in the winter period, so that the problem that the quality of the concrete structure cannot be guaranteed due to the construction in the winter period is avoided. Specifically, the insulation structure in this embodiment includes:
as shown in fig. 1, after the concrete structure is poured, a plastic film and a cotton quilt insulation layer 4 are laid on the surface of the concrete structure, wherein the plastic film is directly laid on the surface of the newly poured concrete structure, and the cotton quilt insulation layer is covered on the plastic film. The plastic film is relatively dry and not easy to retain moisture compared with a cotton quilt heat-insulating layer, and can ensure the surface quality of concrete, and the cotton quilt heat-insulating layer mainly plays a role in isolating the alternation of internal heat and external heat, namely, the newly poured concrete structure is prevented from being influenced by the external winter temperature. The plastic film and the cotton quilt heat-insulating layer 4 arranged on the concrete structure mainly realize the heat insulation of the surface of the concrete structure.
As shown in fig. 1 and 2, a thermal insulation curtain 2 and a hot air curtain 3 disposed under a casting portion are hung at an end position before casting of a middle plate and a top plate of a concrete structure. The thermal insulation curtains 2 can be arranged in different frames, that is, as shown in fig. 2, one thermal insulation curtain 2 is arranged at the top plate of the concrete structure, and the other thermal insulation curtain 2 is arranged at the middle plate of the concrete structure, so that the thermal insulation effect is ensured by adopting the different-frame arrangement, and the increase of the thermal alternation caused by the larger span of the thermal insulation curtains 2 is avoided. For the hot air curtain 3, the arrangement position is as shown in fig. 1, and when the hot air curtain is opened, hot air can be sprayed out, so that on one hand, the concrete structure can be heated and insulated, and on the other hand, an air curtain can be formed, so that heat exchange between the concrete structure and the outside can be further isolated. The heat preservation curtain 2 and the hot air curtain 3 mainly realize the heat preservation of the vertical surface of the concrete structure.
As shown in fig. 4, a fire-proof cotton curtain 9 is arranged on a formwork support of a side wall before the side wall 7 of the concrete structure is poured, and the bottom of the fire-proof cotton curtain 9 is fixed by a batten presser foot; the fire-proof cotton curtain 9 covers the formwork support of the side wall 7 to realize heat preservation and avoid heat alternation. A hot air curtain can be arranged below the fireproof cotton curtain 9 to further improve the heat preservation effect. After the side walls 7 are poured, the tops of the steel bars are covered with a quilt heat-insulating layer 8.
In the embodiment, in specific implementation: as shown in fig. 3, when dealing with extreme cold winter environmental temperature, the steel support 5 is respectively arranged above the middle plate and the top plate of the concrete structure, the plastic cloth and the cotton curtain 6 are arranged on the steel support 5, and the hot air curtain is additionally arranged on one side of the steel support 5, so that the temperature of the steel bar is ensured to meet the construction requirement (generally not lower than 5 ℃), and meanwhile, the temperature of the concrete and the temperature of the steel bar after thermal balance is avoided to be lower than 2 ℃.
The thermal insulation curtain 2 can adopt a cotton curtain or color strip cloth.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, the description thereof is not repeated herein.
Claims (3)
1. The utility model provides a heat preservation structure for concrete structure winter construction for carry out heat preservation maintenance to the concrete structure of the subway station main part of being under construction at winter, its characterized in that: the insulation construction includes: after the concrete structure is poured, a plastic film laid on the surface of the concrete structure and a quilt heat-insulating layer covered on the surface of the plastic film are paved; before the middle plate and the top plate of the concrete structure are poured, a heat insulation curtain arranged at the end part of the concrete structure and a hot air curtain arranged below the pouring part are hung; the fireproof curtain is arranged on a template support of the side wall of the concrete structure before the side wall of the concrete structure is poured, and the hot air curtain is arranged below the fireproof curtain.
2. The insulation structure for concrete structure winter construction according to claim 1, wherein: the middle plate and the top plate are provided with steel supports, plastic cloth and cotton curtains are arranged on the steel supports, and hot air curtains are arranged on one sides of the steel supports.
3. The insulation structure for concrete structure winter construction according to claim 1, wherein: the heat insulation structure further comprises a cotton quilt heat insulation layer on the top of the steel bar after the side wall is poured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020441834.7U CN212224694U (en) | 2020-03-31 | 2020-03-31 | A insulation construction for concrete structure winter construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020441834.7U CN212224694U (en) | 2020-03-31 | 2020-03-31 | A insulation construction for concrete structure winter construction |
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| CN212224694U true CN212224694U (en) | 2020-12-25 |
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| CN202020441834.7U Active CN212224694U (en) | 2020-03-31 | 2020-03-31 | A insulation construction for concrete structure winter construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530272A (en) * | 2021-07-12 | 2021-10-22 | 五冶集团上海有限公司 | Winter concrete heat preservation method |
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2020
- 2020-03-31 CN CN202020441834.7U patent/CN212224694U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530272A (en) * | 2021-07-12 | 2021-10-22 | 五冶集团上海有限公司 | Winter concrete heat preservation method |
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