JP6261995B2 - Concrete temperature control method - Google Patents
Concrete temperature control method Download PDFInfo
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- JP6261995B2 JP6261995B2 JP2014015020A JP2014015020A JP6261995B2 JP 6261995 B2 JP6261995 B2 JP 6261995B2 JP 2014015020 A JP2014015020 A JP 2014015020A JP 2014015020 A JP2014015020 A JP 2014015020A JP 6261995 B2 JP6261995 B2 JP 6261995B2
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- concrete
- floor slab
- temperature
- fluid
- control method
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- 238000000034 method Methods 0.000 title claims description 12
- 239000012530 fluid Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 description 8
- 238000009415 formwork Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Bridges Or Land Bridges (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Description
本発明は、中空床版を構築する際のコンクリートの温度制御方法に関する。 The present invention relates to a concrete temperature control method for constructing a hollow floor slab.
コンクリート橋梁の上部工には、荷重等を軽減する目的で、床版内に箱抜き用の円筒型枠を設置して、その周囲にコンクリートを打設する方法がある。 In the superstructure of a concrete bridge, there is a method of placing a box-shaped cylindrical form in the floor slab and placing concrete around it for the purpose of reducing the load.
中空床版の桁高は1mを越え、部分的にマスコンクリートとなることがあり、打設したコンクリートの水和熱に起因する体積変化による温度ひび割れが生じやすくなる。 The girder height of the hollow floor slab exceeds 1 m and may become part of mass concrete, which tends to cause temperature cracks due to volume changes caused by the heat of hydration of the placed concrete.
温度ひび割れを抑制するためには、コンクリート施工時に、打設するコンクリート温度を低減させたり、非特許文献1に示すようなパイプクーリングを行い、コンクリートの硬化時に発生する水和熱を低減させる必要がある。
In order to suppress temperature cracking, it is necessary to reduce the temperature of the concrete to be placed during concrete construction or to reduce the heat of hydration generated during hardening of the concrete by pipe cooling as shown in
パイプクーリングは、コンクリート部材内にクーリングパイプを設置して、パイプ内部に冷水を通してコンクリート内部の温度を下げる方法である。コンクリート部材内にパイプを張り巡らせるため、手間がかかる。 Pipe cooling is a method in which a cooling pipe is installed in a concrete member and the temperature inside the concrete is lowered by passing cold water through the pipe. It takes time and effort to stretch the pipe in the concrete member.
コンクリート打ち込み中は、部材内に張り巡らせれたパイプが破損しないように留意しなければならない。さらに、部材内の冷却を終えたパイプは、部材としては不要な物を残置しなければならず、パイプクーリング終了後のパイプ内部を無収縮モルタルで充填する必要もある。 Care must be taken during placement of the concrete so that the pipes stretched around the member do not break. Furthermore, the pipe which has finished cooling in the member must leave an unnecessary object as the member, and the pipe interior after the pipe cooling needs to be filled with non-shrink mortar.
非特許文献２に示された方法は、シースクーリングと呼ばれるものであり、PC鋼線を入れるためのシース管内に空気を入れ部材内を冷却する方法であり、シース管が配設されるPC構造物のみに適用できる。
The method shown in Non-Patent
また、特許文献１に示すように、箱抜き用の円筒型枠は大きな浮力がかかり、円筒型枠の浮き上がりが問題になることがある。
Moreover, as shown in
本発明のコンクリート温度の制御方法は、中空床版のコンクリート内に配設された、箱抜き用型枠の一方の外部から内部に送り込み、箱抜き用型枠周囲のコンクリート温度を制御し、他の一方から流体を排出することを特徴とする。 The concrete temperature control method of the present invention is a method of controlling the concrete temperature around the boxing formwork by feeding it from one outside of the boxing formwork disposed in the concrete of the hollow floor slab, The fluid is discharged from one of the above.
また、上記箱抜き型枠内に供給する流体に水を使用することにより、上記箱抜き型枠内の浮き上がり防止の手段を軽微とできることを特徴とする。 Further, by using water as the fluid supplied into the boxing mold, the means for preventing the floating in the boxing mold can be made light.
本発明によれば、中空床版のコンクリート施工時において、クーリングパイプの配設作業が発生しないため、作業を大幅に省略できる。 According to the present invention, when the concrete construction of the hollow floor slab is performed, the operation of arranging the cooling pipe does not occur, so that the work can be largely omitted.
また、流体に水を使用すれば、箱抜き用型枠の浮き上がり防止対策を軽微とできるため、作業を省略化できる。 Further, if water is used as the fluid, the measures for preventing the boxing form from being lifted can be minimized, and the work can be omitted.
また、コンクリート温度の制御を効果的に行えるため、コンクリートの温度ひび割れを防止することができる。 Moreover, since concrete temperature can be controlled effectively, temperature cracks in concrete can be prevented.
本発明に係わる、中空床版のコンクリート温度制御方法の態様を図面に示した実施例に基づいて説明する。 An embodiment of a concrete temperature control method for a hollow floor slab according to the present invention will be described based on an embodiment shown in the drawings.
中空床版を構築する際は図１に示す通り、中空床版内に箱抜き用円筒型枠２が配設されその周囲にコンクリートを打設する。
When constructing a hollow floor slab, as shown in FIG. 1, a box form
本発明方法は、図１および図２に示す通り、箱抜き用円筒型枠２の端部に流入孔３、他端部には流出孔４を備えている。図には中空床版上部に流入孔、中空床版下部には流出孔を設置しているが、設置場所や流体の向きを限定するものではないが、最も離れた位置に配置するのがよい。
As shown in FIGS. 1 and 2, the method of the present invention is provided with an
流体はポンプ５から配管６を経て流入孔３に送られ、それぞれの箱抜き用円筒型枠２に流体が送り込まれ、流出孔４から排出される。
The fluid is sent from the
この時、内部のコンクリート温度より温度の低い流体を送れば、箱抜き用円筒型枠２の周囲に位置するコンクリート温度を低下させることができる。
At this time, if a fluid having a temperature lower than the concrete temperature inside is sent, the concrete temperature located around the box-shaped
温度ひび割れを抑制するための適切な流体温度、流体を送る時間等は別に温度応力解析を行うことが好ましい。 It is preferable to perform a temperature stress analysis separately from an appropriate fluid temperature for suppressing temperature cracking, a time for feeding the fluid, and the like.
流体には水を使用するのが効果的ではあるが、空気を使用してもよい。 Although it is effective to use water as the fluid, air may be used.
コンクリート打設時には、箱抜き用円筒型枠２は大きな浮力を受ける。通常は箱抜き用円筒型枠２と他の型枠等に強固に固定する必要があるが、箱抜き用円筒型枠２を水で満たした場合は、その自重により浮力を低減させることができため、通常ほど強固に固定する必要がなくなる。
At the time of placing concrete, the box form
また、流体に水を使用する場合は、箱抜き用コンクリート型枠内を通過した後の水を回収し冷却して、再度利用してもよい。 Moreover, when using water for a fluid, you may collect | recover and cool the water after passing through the inside of a boxing concrete formwork, and you may use again.
流体に空気を使用する場合は、水タンク等を設ける必要も無くポンプにコンプレッサーを使用すればよく、簡易な設備で実施できる。 When air is used for the fluid, it is not necessary to provide a water tank or the like, and a compressor may be used for the pump, which can be implemented with simple equipment.
施工後は流入孔３および流出孔４は、箱抜き用円筒型枠の通気孔として利用出来るため撤去の必要が無いこともある。
After the construction, the
１ コンクリート
２ 箱抜き用型枠
３ 流入孔
４ 流出孔
5 ポンプ
６ 配管
７ 流体の向き
DESCRIPTION OF
5
Claims (1)
前記空洞を形成する型枠は、コンクリート内に埋め込まれた中空型枠であって、該中
空床版の一方の上端側に流体の入り口となる流入孔と、他方の下端側に流体の出口となる
流出孔を備え、
前記流入孔から水を流入させ、流出孔から流出させて前記中空型枠の周囲に位置する
コンクリートの温度を制御する方法。 In the concrete temperature control method when constructing a hollow floor slab where multiple cavities are arranged in parallel,
The mold forming the cavity is a hollow mold embedded in concrete,
An inflow hole serving as a fluid inlet on one upper end side of the empty floor slab, and an outflow hole serving as a fluid outlet on the other lower end side ,
A method of controlling the temperature of the concrete positioned around the hollow form by flowing water from the inflow hole and outflowing from the outflow hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014015020A JP6261995B2 (en) | 2014-01-30 | 2014-01-30 | Concrete temperature control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014015020A JP6261995B2 (en) | 2014-01-30 | 2014-01-30 | Concrete temperature control method |
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| Publication Number | Publication Date |
|---|---|
| JP2015140602A JP2015140602A (en) | 2015-08-03 |
| JP6261995B2 true JP6261995B2 (en) | 2018-01-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505257A (en) * | 2018-12-24 | 2019-03-22 | 中铁三局集团有限公司 | A kind of pier shaft Temperature Controlling of Mass Concrete construction method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7116887B2 (en) * | 2017-07-12 | 2022-08-12 | 株式会社安藤・間 | Concrete cooling system and concrete cooling method |
| KR102124709B1 (en) * | 2018-12-06 | 2020-06-18 | 현대건설주식회사 | Concrete Block of Concrete Temperature Gap by means of Pipe Cooling and Manufacturing Method for Concrete Block |
| CN112095472A (en) * | 2020-09-10 | 2020-12-18 | 黑龙江八一农垦大学 | Large-volume concrete pier cooling system based on tie bar hole is recycled |
| CN115324349A (en) * | 2022-06-24 | 2022-11-11 | 中国建筑第七工程局有限公司 | Construction method for mass concrete of linear accelerator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5707179A (en) * | 1996-03-20 | 1998-01-13 | Bruckelmyer; Mark | Method and apparaatus for curing concrete |
| JPH10110411A (en) * | 1996-10-04 | 1998-04-28 | Taisei Corp | Cylindrical form suspension method |
| JP2004197520A (en) * | 2002-12-20 | 2004-07-15 | Maeda Corp | Void form, concrete structure using the void form and construction method for concrete layer |
| JP2013060712A (en) * | 2011-09-12 | 2013-04-04 | Sumitomo Mitsui Construction Co Ltd | Construction method of hollow frame and hollow concrete structure using the same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505257A (en) * | 2018-12-24 | 2019-03-22 | 中铁三局集团有限公司 | A kind of pier shaft Temperature Controlling of Mass Concrete construction method |
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| JP2015140602A (en) | 2015-08-03 |
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