阅读说明：本技术 一种降低大体积混凝土水化热温度的pcm材料储存管道及施工方法 (PCM material storage pipeline for reducing hydration heat temperature of mass concrete and construction method ) 是由 乔崎云 李佳峰 刘文超 于 2020-06-03 设计创作，主要内容包括：本发明公开了一种降低大体积混凝土水化热温度的PCM材料储存管道及施工方法,所有部分由工厂预制制成,现场装配,其中储存管道与管道口焊接,通过管道口锚固筋与大体积混凝土中钢筋绑扎固定位置,增加结构整体性,浇筑混凝土后,将相变材料放入PCM材料储存管道,将管道口与盖板通过螺栓连接密封PCM材料储存管道,相变材料可在大体积混凝土内部因发生水化热而温度过高时产生作用,降低大体积混凝土内部温度,从而确保减少大体积混凝土因表面温度与内部温度温差过大而产生的裂缝,降低裂缝对大体积混凝土强度的影响,待混凝土养护完成后,打开盖板排出相变材料后,在PCM材料储存管道中浇筑混凝土,提高结构的可靠性。(The invention discloses a PCM material storage pipeline for reducing hydration heat temperature of mass concrete and a construction method, wherein all parts are prefabricated by factories and assembled on site, wherein the storage pipeline is welded with a pipeline port, fixed positions are bound with reinforcing steel bars in the mass concrete through anchoring ribs at the pipeline port to increase structural integrity, after the concrete is poured, phase change materials are put into the PCM material storage pipeline, the pipeline port and a cover plate are connected through a bolt to seal the PCM material storage pipeline, the phase change materials can act when the temperature is overhigh due to hydration heat in the mass concrete to reduce the internal temperature of the mass concrete, thereby ensuring that cracks generated by the overlarge surface temperature and the overlarge internal temperature of the mass concrete are reduced, the influence of the temperature difference of the cracks on the strength of the mass concrete is reduced, after the concrete is cured, the cover plate is opened to discharge the phase change materials, concrete is poured in the PCM material storage pipeline, and the reliability of the structure is improved.)

1. A PCM material storage pipeline for reducing hydration heat temperature of mass concrete is characterized in that: the pipeline mouth (2) that will weld pipeline mouth anchor muscle (3) and pipeline mouth screw rod (4) passes through welded connection with storage pipeline (1), pipeline mouth anchor muscle (3) stretch into the steel reinforcement cage, through fixing its position with bulky concrete reinforcing bar (7) ligature, put into PCM material storage pipeline with phase change material behind concreting (8), through nut (6) with pipeline mouth screw rod (4) and apron (5) bolt joint sealed PCM material storage pipeline, treat the concrete maintenance completion back, open apron (5) and discharge phase change material, concreting (8) are pour in PCM material storage pipeline.

2. The PCM material storage tube for reducing the hydration heat temperature of mass concrete of claim 1, wherein: the storage pipeline (1) is made of Q235 steel, the thickness of the pipeline is not less than 10mm, and the outer diameter of the pipeline is not less than 200 mm.

3. The PCM material storage tube for reducing the hydration heat temperature of mass concrete of claim 1, wherein: the pipeline opening (2) is square, Q235 steel is adopted, the thickness is not less than 20mm, the side length is not less than 300mm, and a hole with the same diameter as that of the storage pipeline (1) is reserved.

4. The PCM material storage tube for reducing the hydration heat temperature of mass concrete of claim 1, wherein: the pipeline opening anchoring rib (3) is made of Q235 steel bars, the diameter is not less than 20mm, and the length is not less than 150 mm.

5. The PCM material storage tube for reducing the hydration heat temperature of mass concrete of claim 1, wherein: the pipeline port screw rod (4) is made of No. 45 steel, the diameter of the pipeline port screw rod is 20mm, and the length of the pipeline port screw rod is 50 mm.

6. The PCM material storage tube for reducing the hydration heat temperature of mass concrete of claim 1, wherein: the cover plate (5) is square, Q235 steel is adopted, the thickness is not less than 20mm, the side length is consistent with the pipeline opening (2), a bolt hole for the pipeline opening screw rod (4) to penetrate through is reserved, and the hole of the pipeline opening (2) needs to be completely covered.

7. The PCM material storage tube for reducing the hydration heat temperature of mass concrete of claim 1, wherein: the large-volume concrete reinforcing steel bars (7) and the concrete (8) are selected according to the requirements of the drawing.

8. The PCM material storage tube for reducing the hydration heat temperature of mass concrete of claim 1, wherein: the concrete (8) is poured in the PCM material storage pipeline, and the strength of the concrete (8) is consistent with that of the concrete (8) required by the structure.

9. The construction method using the PCM material storage tube according to any one of claims 1 to 8, wherein the construction method comprises:

the first step is as follows: prefabricating a storage pipeline, a pipeline port and a cover plate in a factory; reserving a hole of a screw rod of a pipeline port when the cover plate is manufactured, reserving a hole of a storage pipeline when the pipeline port is manufactured, and welding the storage pipeline and the pipeline port after the screw rod of the pipeline port and the anchoring rib of the pipeline port are welded with the pipeline port;

the second step is that: assembling on site; reserving PCM material storage pipeline holes in the large-volume concrete formwork and the binding reinforcement cage, and binding and fixing the PCM material storage pipeline manufactured in a factory with reinforcing steel bars in large-volume concrete through anchoring ribs on a pipeline opening;

the third step: pouring the mass concrete, injecting the phase change material into a PCM material storage pipeline after pouring is finished, and sealing a cover plate with a pipeline opening through bolting;

the fourth step: and after the concrete is cured, opening the cover plate, discharging the phase-change material, pouring the concrete in the PCM material storage pipe and curing.

Technical Field

The invention belongs to the technical field of mass concrete in building structure engineering, and particularly relates to a PCM material storage pipeline for reducing the hydration heat temperature of mass concrete and a construction method.

Background

With the rapid development of social economy and the increase of the demand of people on living environment, building structures are developed towards higher heights and larger volumes, so that the large-volume concrete is more and more applied to the building structures. The mass concrete has the characteristics of large concrete quantity, complex construction procedure, high construction technical requirement and the like. The large-volume concrete has a construction difficulty, after the concrete is poured, the concrete can release certain heat in the hydration process, because the concrete is too large in volume and thick in section, the heat released in the concrete hydration process is not easy to dissipate, the heat is released and gathered at the central part of the large-volume concrete volume, so that the temperature of the central part of the large-volume concrete volume is too high, the heat released by the concrete hydration heat on the surface of the large-volume concrete is easier to dissipate, the temperature difference between the surface temperature of the large-volume concrete and the internal temperature is too large, because the tensile strength of the concrete is weaker, the temperature difference is too large, so that the concrete generates temperature stress, when the temperature stress is greater than the tensile strength of the concrete, cracks are generated, and the safety and the normal use of the structure are influenced.

Phase Change Materials (PCM) have been used today in building structures, primarily for regulating the temperature inside the building structure. The working principle of the phase-change material is that when the ambient temperature is too high or too low, the phase-change material can absorb or release heat, the temperature of the phase-change material does not change while the ambient temperature is adjusted, and the phase-change material has a certain energy storage function, for example, when the ambient temperature is too high, the phase-change material absorbs the heat and stores the heat in the phase-change material, and when the temperature is changed from high to low, the phase-change material releases the stored heat to keep the temperature of the ambient environment unchanged.

How to reduce the temperature difference between the interior and the surface of the mass concrete when the concrete generates hydration heat is the key for ensuring the safety of the mass concrete structure, phase change materials are combined with the mass concrete, and meanwhile, the strength of the mass concrete is not influenced, and the key lies in the construction measures.

Disclosure of Invention

The invention provides a PCM material storage pipeline for reducing the hydration heat temperature of mass concrete and a construction method. All parts of the PCM material storage pipeline comprise a storage pipeline, a pipeline opening and a cover plate, all parts are prefabricated in a factory and assembled on site, all parts of the PCM material storage pipeline are assembled and then bound with reinforcing steel bars in mass concrete to be fixed, integrity is guaranteed, after the concrete is poured, the phase-change material plays a role when the temperature is too high due to hydration heat in the mass concrete, the internal temperature is reduced, the phase-change material is discharged after the concrete is cured, the concrete is poured in the PCM material storage pipeline, and the reliability of the mass concrete structure is improved. The structure is simple, the construction is convenient, and the concrete is suitable for wide popularization and application in mass concrete.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a reduce PCM material of bulky concrete hydration heat temperature and store pipeline, includes storage pipeline (1), pipeline mouth (2), pipeline mouth anchor muscle (3), pipeline mouth screw rod (4), apron (5), nut (6), bulky concrete reinforcing bar (7) and concrete (8). The pipeline port (2) welded with the pipeline port anchoring rib (3) and the pipeline port screw rod (4) is connected with the storage pipeline (1) in a welding mode, the pipeline port anchoring rib (3) extends into a reinforcement cage and is bound with the large-volume concrete reinforcement (7) to be fixed in position, after concrete (8) is poured, the phase change material is placed into the PCM material storage pipeline, the pipeline port screw rod (4) and the cover plate (5) are bolted through the nut (6) to seal the PCM material storage pipeline, and after concrete curing is completed, the cover plate (5) is opened to discharge the phase change material; and pouring concrete (8) in the PCM material storage pipeline and maintaining to finish the construction of the PCM material storage pipeline for reducing the hydration heat temperature of the large-volume concrete.

The storage pipeline (1) is made of Q235 steel, the thickness of the pipeline is not less than 10mm, and the outer diameter of the pipeline is not less than 200 mm.

The pipeline opening (2) is square, Q235 steel is adopted, the thickness is not less than 20mm, the side length is not less than 300mm, and a hole with the same diameter as that of the storage pipeline (1) is reserved.

The pipeline opening anchoring rib (3) is made of Q235 steel bars, the diameter is not less than 20mm, and the length is not less than 150 mm.

The pipeline port screw rod (4) is made of No. 45 steel, the diameter of the pipeline port screw rod is 20mm, and the length of the pipeline port screw rod is 50 mm.

The cover plate (5) is square, Q235 steel is adopted, the thickness is not less than 20mm, the side length is consistent with the pipeline opening (2), bolt holes for the pipeline opening screw rods (4) to penetrate through are reserved, and the hole of the pipeline opening (2) needs to be completely covered.

The large-volume concrete reinforcing steel bars (7) and the concrete (8) are selected according to the requirements of the drawing.

The concrete (8) is poured in the PCM material storage pipeline, and the strength of the concrete (8) is consistent with that of the concrete (8) required by the structure.

Compared with the prior art, the PCM material storage pipeline for reducing the hydration heat temperature of the mass concrete and the construction method have the following advantages:

(1) the invention relates to a PCM material storage pipeline for reducing the hydration heat temperature of mass concrete and a construction method. All parts are manufactured by factories, assembled on site, convenient to construct and time-saving, the temperature of hydration heat in the large-volume concrete can be reduced, the cracking of the large-volume concrete caused by temperature difference is reduced, the reliability of the large-volume concrete is improved, and the concrete is suitable for popularization and application in large-volume concrete coagulation structures.

(2) The pipeline is stored to the PCM material fixed, and pipeline mouth anchor muscle stretches into the steel reinforcement cage, with reinforcement binding connection fixed position in the bulky concrete, makes whole pipeline more stable, improves the wholeness of structure.

(3) Compared with the traditional flowing water cooling, the phase-change material cooling reduces the water resource waste and improves the cooling efficiency inside the mass concrete.

(4) After the large-volume concrete is cured, the phase-change material can be discharged from the PCM material storage pipeline, and concrete is poured in the PCM material storage pipeline, so that the influence of structural strength reduction caused by embedding the phase-change material in the pipeline is reduced.

Drawings

FIG. 1 is a partial detail view of a PCM material storage conduit reducing the hydration heat temperature of bulk concrete;

FIG. 2 is a schematic view of a conduit port;

FIG. 3 is a schematic view of a storage tube welded to a tube port;

FIG. 4 is a schematic view of a PCM material storage tube secured in a reinforcement cage;

FIG. 5 is a schematic view of a PCM material storage conduit fully partially spliced;

FIG. 6 is a schematic left side view of a PCM material storage conduit being cast with bulk concrete and sealed with a cover plate;

FIG. 7 is a schematic view of a storage conduit for casting bulk concrete and sealing PCM material with a cover plate;

in the figure: 1-a storage pipeline; 2-pipe orifice; 3-anchoring ribs at the pipeline opening; 4-pipeline port screw; 5-cover plate; 6-a nut; 7-mass concrete reinforcing steel bars; 8-concrete.

Detailed Description

The construction method of the PCM material storage pipeline for reducing the hydration heat temperature of the mass concrete is illustrated by combining the attached drawings 1-7, and the manufacturing method comprises the following steps:

an implementation method of a PCM material storage pipeline for reducing the hydration heat temperature of mass concrete comprises the following steps:

the first step is as follows: the storage pipeline, the pipeline port and the cover plate are prefabricated in a factory. The pipeline mouth screw rod hole is reserved during the apron preparation, and the pipeline hole is reserved when the pipeline mouth is made, with pipeline mouth screw rod and pipeline mouth anchor muscle and pipeline mouth welding back, will store pipeline and pipeline mouth welding.

The second step is that: and (6) assembling on site. The PCM material storage pipeline hole is reserved to bulky concrete formwork and ligature steel reinforcement cage, will store the pipeline at the good PCM material of mill preparation, through the reinforcement fixed position in anchor muscle on the pipeline mouth and the bulky concrete.

The third step: and (3) carrying out concrete pouring on the mass concrete, injecting the phase change material into the PCM material storage pipeline after the pouring is finished, and sealing the cover plate with the pipeline opening through bolting.

The fourth step: and after the concrete is cured, opening the cover plate, discharging the phase-change material, pouring the concrete in the PCM material storage pipe and curing.

The above description is only one specific embodiment of the present invention, but the application of the present invention is not limited thereto. The dimensions and materials of the various components listed in the practice of the invention can be selected according to the actual requirements and are not listed here.