JP7512092B2 - Grout heating and curing method - Google Patents

Grout heating and curing method Download PDF

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JP7512092B2
JP7512092B2 JP2020098513A JP2020098513A JP7512092B2 JP 7512092 B2 JP7512092 B2 JP 7512092B2 JP 2020098513 A JP2020098513 A JP 2020098513A JP 2020098513 A JP2020098513 A JP 2020098513A JP 7512092 B2 JP7512092 B2 JP 7512092B2
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joints
heating
grout
joint
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JP2021191718A (en
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孝志 林
正樹 淵本
隆浩 長田
佳名子 乙藤
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Shimizu Corp
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Description

本発明は、プレキャストコンクリート部材接合部のグラウト加温養生方法および養生装置に関するものである。 The present invention relates to a method and apparatus for heating and curing grout at joints of precast concrete members.

従来、プレキャストコンクリート部材の接合部のグラウト注入後における初期強度発現は、気温により影響を受けやすく、特に冬季の場合は気温が低いため強度発現が遅く、次工程に影響することが知られている（例えば、特許文献１を参照）。 Conventionally, it has been known that the initial strength development after grout injection into the joints of precast concrete members is easily affected by temperature, and that in winter in particular, the low temperatures slow down the development of strength, affecting the next process (see, for example, Patent Document 1).

グラウト材の強度発現を促進させる従来の方法として、例えば電熱マット等の加温シートをプレキャストコンクリート部材間の接合部（目地部）の表面に巻き付けて加温する方法などがある。 Conventional methods for promoting the development of strength in grout materials include, for example, wrapping a heating sheet such as an electric heating mat around the surface of the joints (joints) between precast concrete members to heat them.

特開２０１４－１６３１０８号公報JP 2014-163108 A

しかし、上記の従来の方法は、プレキャストコンクリート部材間の目地部の表面のみが加温され、目地部の内部の温度は上がりにくいという問題があった。このため、安定した強度発現が得られないおそれがあった。 However, the above conventional method had the problem that only the surface of the joints between the precast concrete members was heated, and the temperature inside the joints was difficult to increase. As a result, there was a risk that stable strength development could not be achieved.

本発明は、上記に鑑みてなされたものであって、プレキャストコンクリート部材間の目地部の表面から内部までグラウト材を加温することができるグラウト加温養生方法および養生装置を提供することを目的とする。 The present invention has been made in consideration of the above, and aims to provide a grout heating and curing method and curing device that can heat grout material from the surface to the inside of the joints between precast concrete members.

上記した課題を解決し、目的を達成するために、本発明に係るグラウト加温養生方法は、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する方法であって、グラウト材を注入する前に目地部を養生枠で覆い、目地部と養生枠の間に加温空気を送り込んで目地部の内部を予め加温した後、グラウト材を注入し、その後、目地部と養生枠の間に加温空気または温水を送り込むことを特徴とする。 In order to solve the above problems and achieve the objectives, the grout heating and curing method of the present invention is a method for heating and curing the grout material to be injected into the joints formed between precast concrete members, which is characterized in that before injecting the grout material, the joints are covered with a curing frame, heated air is pumped between the joints and the curing frame to preheat the inside of the joints, the grout material is then injected, and heated air or hot water is then pumped between the joints and the curing frame.

また、本発明に係る他のグラウト加温養生方法は、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する方法であって、目地部を養生枠で覆った後、目地部にグラウト材を注入し、その後、目地部と養生枠の間に温水を送り込んで養生することを特徴とする。 Another grout heating and curing method according to the present invention is a method for heating and curing grout material to be injected into joints formed between precast concrete members, characterized in that the joints are covered with a curing frame, the grout material is injected into the joints, and then warm water is pumped between the joints and the curing frame to cure them.

また、本発明に係るグラウト加温養生装置は、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する装置であって、目地部を覆う養生枠と、目地部と養生枠の間に加温空気を送り込んで目地部の内部を予め加温する加温空気供給手段とを備えることを特徴とする。 The grout heating and curing device according to the present invention is a device that heats and cures the grout material injected into the joints formed between precast concrete members, and is characterized by having a curing frame that covers the joints, and heated air supply means that preheats the inside of the joints by sending heated air between the joints and the curing frame.

また、本発明に係る他のグラウト加温養生装置は、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する装置であって、目地部を覆う養生枠と、目地部と養生枠の間に温水を送り込んで目地部の内部を加温する温水供給手段とを備えることを特徴とする。 Another grout heating and curing device according to the present invention is a device that heats and cures grout material injected into joints formed between precast concrete members, and is characterized by having a curing frame that covers the joints and a hot water supply means that sends hot water between the joints and the curing frame to heat the inside of the joints.

本発明に係るグラウト加温養生方法によれば、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する方法であって、グラウト材を注入する前に目地部を養生枠で覆い、目地部と養生枠の間に加温空気を送り込んで目地部の内部を予め加温した後、グラウト材を注入し、その後、目地部と養生枠の間に加温空気または温水を送り込むので、送り込んだ加温空気によって、プレキャストコンクリート部材間の目地部の表面から内部までグラウト材を加温養生することができるという効果を奏する。 The grout heating and curing method of the present invention is a method for heating and curing the grout material injected into the joints formed between precast concrete members. Before injecting the grout material, the joints are covered with a curing frame, heated air is pumped between the joints and the curing frame to preheat the inside of the joints, the grout material is injected, and then heated air or hot water is pumped between the joints and the curing frame. This has the effect of heating and curing the grout material from the surface to the inside of the joints between the precast concrete members with the pumped heated air.

また、本発明に係る他のグラウト加温養生方法によれば、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する方法であって、目地部を養生枠で覆った後、目地部にグラウト材を注入し、その後、目地部と養生枠の間に温水を送り込んで養生するので、送り込んだ温水によって、プレキャストコンクリート部材間の目地部の表面から内部までグラウト材を加温養生することができるという効果を奏する。 In addition, another grout heating and curing method according to the present invention is a method for heating and curing the grout material injected into the joints formed between precast concrete members, in which the joints are covered with a curing frame, the grout material is injected into the joints, and then warm water is pumped between the joints and the curing frame to cure them. This has the effect of heating and curing the grout material from the surface to the inside of the joints between the precast concrete members by the pumped warm water.

また、本発明に係るグラウト加温養生装置によれば、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する装置であって、目地部を覆う養生枠と、目地部と養生枠の間に加温空気を送り込んで目地部の内部を予め加温する加温空気供給手段とを備えるので、送り込んだ加温空気によって、プレキャストコンクリート部材間の目地部の表面から内部までグラウト材を加温養生することができるという効果を奏する。 The grout heating and curing device according to the present invention is a device that heats and cures the grout material injected into the joints formed between precast concrete members, and is equipped with a curing frame that covers the joints and heated air supply means that preheats the inside of the joints by sending heated air between the joints and the curing frame, so that the heated air sent in can heat and cure the grout material from the surface to the inside of the joints between the precast concrete members.

また、本発明に係る他のグラウト加温養生装置によれば、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する装置であって、目地部を覆う養生枠と、目地部と養生枠の間に温水を送り込んで目地部の内部を加温する温水供給手段とを備えるので、送り込んだ温水によって、プレキャストコンクリート部材間の目地部の表面から内部までグラウト材を加温養生することができるという効果を奏する。 Another grout heating and curing device according to the present invention is a device that heats and cures the grout material injected into the joints formed between precast concrete members, and is equipped with a curing frame that covers the joints and a hot water supply means that pumps hot water between the joints and the curing frame to heat the inside of the joints, so that the pumped hot water can heat and cure the grout material from the surface to the inside of the joints between the precast concrete members.

図１は、本発明に係るグラウト加温養生方法および養生装置の実施の形態１を示す側断面図である。FIG. 1 is a side cross-sectional view showing a grout heating curing method and curing apparatus according to a first embodiment of the present invention. 図２は、本発明に係るグラウト加温養生方法および養生装置の実施の形態２を示す側断面図である。FIG. 2 is a side cross-sectional view showing a grout heating curing method and curing apparatus according to a second embodiment of the present invention. 図３は、図２に対応する写真図である。FIG. 3 is a photograph corresponding to FIG. 図４は、本発明に係るグラウト加温養生方法および養生装置の実施の形態３を示す側断面図である。FIG. 4 is a side cross-sectional view showing a grout heating curing method and curing apparatus according to a third embodiment of the present invention. 図５は、図４に対応する写真図である。FIG. 5 is a photograph corresponding to FIG.

以下に、本発明に係るグラウト加温養生方法および養生装置の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Below, an embodiment of the grout heating curing method and curing device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to this embodiment.

（実施の形態１）
まず、本発明の実施の形態１について説明する。
図１に示すように、本実施の形態１に係るグラウト加温養生装置１００は、プレキャストコンクリート部材１０間に形成された目地部１２に注入されるグラウト材を加温して養生する装置であって、目地部１２を覆う耐熱養生シート１４（養生枠）と、目地部１２と耐熱養生シート１４の間に加温空気を送り込んで目地部１２の内部を予め加温する加温空気供給手段１６とを備える。本実施の形態では、プレキャストコンクリート部材１０は直方体状であり、水平に延びる目地部１２を挟んで上下に配置される場合を想定するが、本発明はこれに限るものではない。 (Embodiment 1)
First, a first embodiment of the present invention will be described.
As shown in Fig. 1, the grout heating and curing device 100 according to the first embodiment is a device for heating and curing a grout material to be injected into joints 12 formed between precast concrete members 10, and includes a heat-resistant curing sheet 14 (curing frame) that covers the joints 12, and heated air supply means 16 that preheats the inside of the joints 12 by sending heated air between the joints 12 and the heat-resistant curing sheet 14. In this embodiment, the precast concrete members 10 are rectangular parallelepipeds, and are assumed to be arranged above and below the horizontally extending joints 12, but the present invention is not limited to this.

耐熱養生シート１４は、目地部１２の全周を帯状に覆う耐熱性のシートであり、側断面視で目地部１２から外側に向けて凸状に膨らむように配置される。耐熱養生シート１４は、目地部１２の上下に位置する縁がバンド１８でプレキャストコンクリート部材１０の表面に固定される。耐熱養生シート１４により、目地部１２の周りに水平環状の空気通路２０が形成される。耐熱養生シート１４の対向する位置には、給気口２２と排気口２４が形成されている。給気口２２は外部の空気を空気通路２０に供給するためのものであり、排気口２４は空気通路２０の空気を外部に排出するためのものである。 The heat-resistant curing sheet 14 is a heat-resistant sheet that covers the entire circumference of the joint 12 in a band shape, and is arranged so that it bulges outward from the joint 12 in a side cross-sectional view. The edges of the heat-resistant curing sheet 14 located above and below the joint 12 are fixed to the surface of the precast concrete member 10 with bands 18. The heat-resistant curing sheet 14 forms a horizontal ring-shaped air passage 20 around the joint 12. An air supply port 22 and an exhaust port 24 are formed at opposing positions on the heat-resistant curing sheet 14. The air supply port 22 is for supplying outside air to the air passage 20, and the exhaust port 24 is for discharging air from the air passage 20 to the outside.

加温空気供給手段１６は、温風（加温空気）を発生させる温風発生器２６と、発生した温風を給気口２２から空気通路２０に送り込む温風供給管２８とを含んで構成される。温風発生器２６は電源式のものを使用することが好ましい。 The heated air supply means 16 includes a hot air generator 26 that generates hot air (heated air) and a hot air supply pipe 28 that sends the generated hot air from the air intake port 22 to the air passage 20. It is preferable to use a power-operated hot air generator 26.

上記構成の動作および作用について説明する。
まず、グラウト材を注入する前、つまり目地型枠３０を設置する前に目地部１２を耐熱養生シート１４で覆う。続いて、温風発生器２６を稼働して温風を発生させ、温風供給管２８から給気口２２を通じて空気通路２０に温風を送り込む。これにより、空気通路２０から目地部１２の内部に温風を送り込み、目地部１２の内部を予め加温（予熱）する。こうすることで、プレキャストコンクリート部材１０の接合部の内部中央まで加温養生することができる。予熱時間は２４時間程度に設定してもよい。 The operation and function of the above configuration will now be described.
First, before injecting the grout material, that is, before installing the joint formwork 30, the joint 12 is covered with the heat-resistant curing sheet 14. Next, the hot air generator 26 is operated to generate hot air, which is sent from the hot air supply pipe 28 to the air passage 20 through the air inlet 22. This sends hot air from the air passage 20 into the inside of the joint 12, and preheats (pre-heats) the inside of the joint 12. In this way, it is possible to heat and cure the joints of the precast concrete members 10 up to the center of the inside. The pre-heating time may be set to about 24 hours.

しかる後に、耐熱養生シート１４を固定する上側のバンド１８を一時的に緩めて、目地部１２の表面に目地型枠３０を治具３２で固定し、目地部１２にグラウト材を注入し充填する。その後、バンド１８で耐熱養生シート１４を固定してから、空気通路２０に温風を送り込み、加温養生を継続する。グラウト材の注入が完了してから４８時間が経過するまで加温養生を継続することが好ましい。 Then, the upper band 18 that secures the heat-resistant curing sheet 14 is temporarily loosened, the joint formwork 30 is fixed to the surface of the joint 12 with a jig 32, and the grout material is injected and filled into the joint 12. The heat-resistant curing sheet 14 is then secured with the band 18, and hot air is sent into the air passage 20 to continue the heating and curing. It is preferable to continue the heating and curing until 48 hours have passed since the injection of the grout material was completed.

この方法によれば、送り込んだ温風によって、プレキャストコンクリート部材１０間の目地部１２の表面から内部までグラウト材を安定して加温養生することができる。これにより、安定した強度発現を得ることができる。特に、冬季のグラウト工事における初期強度発現の遅延やそれに伴う工程の遅延、品質の確保に寄与することができる。 According to this method, the grout material can be stably heated and cured from the surface to the inside of the joints 12 between the precast concrete members 10 by blowing in hot air. This allows for stable strength development. In particular, this can contribute to preventing delays in initial strength development and associated process delays in grouting work in winter, and ensuring quality.

上記の実施の形態において、グラウト材を注入した後、温風の代わりに温水を空気通路２０に供給して加温養生を継続してもよい。このようにしても上記と同様の作用効果を奏することができる。 In the above embodiment, after the grout material is injected, warm water may be supplied to the air passage 20 instead of warm air to continue the heating and curing process. This method can also achieve the same effects as above.

（実施の形態２）
図２および図３に示すように、本実施の形態２のグラウト加温養生装置２００は、上記の実施の形態１において、耐熱養生シート１４の代わりに断熱材一体木製枠３４を用いたものである。 (Embodiment 2)
As shown in Figs. 2 and 3, a grout heating curing apparatus 200 according to the second embodiment is configured by using a wooden frame 34 integrated with insulating material instead of the heat-resistant curing sheet 14 in the first embodiment.

断熱材一体木製枠３４は、断熱材と木製枠が一体化した養生枠であり、目地部１２の全周を覆うように設けられる。断熱材一体木製枠３４は、側部３６と、底部３８と、蓋部４０と、固定部４２を備えている。側部３６は、目地部１２を含むプレキャストコンクリート部材１０の表面に対向配置される壁板状のものである。側部３６の対向する位置には、給気口２２と排気口２４が形成されている。底部３８は、側部３６の下端からプレキャストコンクリート部材１０の表面に向けて配置され、固定部４２に接続する底板状のものである。固定部４２は、目地部１２の下側のプレキャストコンクリート部材１０の表面に固定される側板状のものである。蓋部４０は、側部３６の上端から目地部１２の上側のプレキャストコンクリート部材１０の表面に接続する蓋板状のものであり、開閉可能とされている。側部３６と、底部３８と、蓋部４０によって、目地部１２の周りに水平環状の空気通路２０が形成される。 The insulation-integrated wooden frame 34 is a curing frame in which the insulation material and the wooden frame are integrated, and is provided to cover the entire circumference of the joint portion 12. The insulation-integrated wooden frame 34 has a side portion 36, a bottom portion 38, a lid portion 40, and a fixing portion 42. The side portion 36 is a wall plate-like member that is arranged opposite the surface of the precast concrete member 10 including the joint portion 12. An air supply port 22 and an exhaust port 24 are formed at opposing positions of the side portion 36. The bottom portion 38 is a bottom plate-like member that is arranged from the lower end of the side portion 36 toward the surface of the precast concrete member 10 and connects to the fixing portion 42. The fixing portion 42 is a side plate-like member that is fixed to the surface of the precast concrete member 10 below the joint portion 12. The lid portion 40 is a lid plate-like member that is connected from the upper end of the side portion 36 to the surface of the precast concrete member 10 above the joint portion 12, and can be opened and closed. The side portion 36, bottom portion 38, and lid portion 40 form a horizontal annular air passage 20 around the joint portion 12.

上記構成の動作および作用について説明する。
まず、グラウト材を注入する前、つまり目地型枠３０を設置する前に目地部１２を断熱材一体木製枠３４で覆う。続いて、温風発生器２６を稼働して温風を発生させ、温風供給管２８から給気口２２を通じて空気通路２０に温風を送り込む。これにより、空気通路２０から目地部１２の内部に温風を送り込み、目地部１２の内部を予め加温（予熱）する。こうすることで、プレキャストコンクリート部材１０の接合部の内部中央まで加温養生することができる。予熱時間は２４時間程度に設定してもよい。 The operation and function of the above configuration will now be described.
First, before injecting the grout material, that is, before installing the joint formwork 30, the joint 12 is covered with a wooden frame 34 integrated with insulating material. Next, the hot air generator 26 is operated to generate hot air, which is sent from the hot air supply pipe 28 through the air inlet 22 to the air passage 20. This sends hot air from the air passage 20 into the inside of the joint 12, and preheats (pre-heats) the inside of the joint 12. In this way, it is possible to heat and cure the joints of the precast concrete members 10 up to the center of the inside. The pre-heating time may be set to about 24 hours.

しかる後に、断熱材一体木製枠３４の蓋部４０を一時的に開放して、目地部１２の表面に目地型枠３０を固定する。その後、目地部１２へのグラウト材の注入を開始する。このグラウト注入作業中も空気通路２０に温風を送り込むことで、加温養生を継続することができる。グラウト材の注入が完了してから４８時間が経過するまで加温養生を継続することが好ましい。 Then, the lid 40 of the insulation-integrated wooden frame 34 is temporarily opened, and the joint formwork 30 is fixed to the surface of the joint 12. Then, the injection of grout into the joint 12 begins. Heat curing can be continued by blowing hot air into the air passage 20 during this grout injection work. It is preferable to continue the heat curing until 48 hours have passed since the injection of the grout material is completed.

この方法によれば、送り込んだ温風によって、プレキャストコンクリート部材１０間の目地部１２の表面から内部までグラウト材を安定して加温養生することができる。これにより、安定した強度発現を得ることができる。特に、冬季のグラウト工事における初期強度発現の遅延やそれに伴う工程の遅延、品質の確保に寄与することができる。 According to this method, the grout material can be stably heated and cured from the surface to the inside of the joints 12 between the precast concrete members 10 by blowing in hot air. This allows for stable strength development. In particular, this can contribute to preventing delays in initial strength development and associated process delays in grouting work in winter, and ensuring quality.

上記の実施の形態において、グラウト材を注入した後、温風の代わりに温水を空気通路２０に供給して加温養生を継続してもよい。このようにしても上記と同様の作用効果を奏することができる。 In the above embodiment, after the grout material is injected, warm water may be supplied to the air passage 20 instead of warm air to continue the heating and curing process. This method can also achieve the same effects as above.

（実施の形態３）
次に、本発明の実施の形態３について説明する。
図４および図５に示すように、本実施の形態３に係るグラウト加温養生装置３００は、上記の実施の形態２において、断熱材一体木製枠３４の代わりに温水養生枠４４を用いたものである。 (Embodiment 3)
Next, a third embodiment of the present invention will be described.
As shown in Figures 4 and 5, a grout heating curing apparatus 300 according to the third embodiment is configured by using a hot water curing frame 44 instead of the insulating material-integrated wooden frame 34 in the above-mentioned second embodiment.

温水養生枠４４は、断熱材と水密性の枠体が一体化した養生枠であり、目地部１２の全周を覆うように設けられる。温水養生枠４４は、側部４６と、底部４８と、蓋部５０と、固定部５２を備えている。側部４６は、目地部１２を含むプレキャストコンクリート部材１０の表面に対向配置される壁板状のものである。側部４６には、給水口５４と排水口５６が形成されている。底部４８は、側部４６の下端からプレキャストコンクリート部材１０の表面に向けて配置され、固定部５２に接続する底板状のものである。固定部５２は、目地部１２の下側のプレキャストコンクリート部材１０の表面に固定される側板状のものである。蓋部５０は、側部４６の上端から目地部１２の上側のプレキャストコンクリート部材１０の表面に接続する蓋板状のものであり、開閉可能とされている。側部４６と、底部４８と、蓋部５０によって、目地部１２の周りに水平環状の温水通路５８が形成される。 The hot water curing frame 44 is a curing frame in which a heat insulating material and a watertight frame body are integrated, and is provided so as to cover the entire circumference of the joint portion 12. The hot water curing frame 44 has a side portion 46, a bottom portion 48, a lid portion 50, and a fixing portion 52. The side portion 46 is a wall plate-like member arranged to face the surface of the precast concrete member 10 including the joint portion 12. A water supply port 54 and a drain port 56 are formed in the side portion 46. The bottom portion 48 is arranged from the lower end of the side portion 46 toward the surface of the precast concrete member 10 and is a bottom plate-like member connected to the fixing portion 52. The fixing portion 52 is a side plate-like member fixed to the surface of the precast concrete member 10 below the joint portion 12. The lid portion 50 is a lid plate-like member connected from the upper end of the side portion 46 to the surface of the precast concrete member 10 above the joint portion 12, and is openable and closable. The side portion 46, bottom portion 48, and lid portion 50 form a horizontal annular hot water passage 58 around the joint portion 12.

このグラウト加温養生装置３００は、温水供給手段６０を備えている。温水供給手段６０は、水が入った容器６２と、容器６２内に配置されたヒーター６４および水中ポンプ６６と、水中ポンプ６６と給水口５４を接続する給水管６８と、容器６２と排水口５６を接続する排水管７０を含んで構成される。ヒーター６４は、例えば容器６２に入れるだけで温水を作り出せる投げ込みヒーターを用いることができる。 This grout heating and curing device 300 is equipped with a hot water supply means 60. The hot water supply means 60 is composed of a container 62 containing water, a heater 64 and a submersible pump 66 arranged in the container 62, a water supply pipe 68 connecting the submersible pump 66 to the water supply port 54, and a drain pipe 70 connecting the container 62 to the drain port 56. The heater 64 can be, for example, a throw-in heater that can produce hot water simply by being placed in the container 62.

上記構成の動作および作用について説明する。
まず、温水養生枠４４と目地型枠３０を目地部１２の周りに設置する。一方、水の入った容器６２にヒーター６４を投入して温水を準備しておく。 The operation and function of the above configuration will now be described.
First, the hot water curing frame 44 and the joint formwork 30 are installed around the joint portion 12. Meanwhile, a heater 64 is placed in a container 62 containing water to prepare hot water.

その後、目地部１２へのグラウト材の注入を開始する。グラウト材の充填前に目地部１２に予熱は与えない。グラウト材の充填が完了した後、水中ポンプ６６を稼働する。給水管６８から給水口５４を通じて温水通路５８に温水を送り込み、排水口５６を通じて排水管７０から容器６２に還水させることで、温水通路５８に沿って温水を循環させ、目地部１２の周辺を加温する。これにより、プレキャストコンクリート部材１０の接合部の内部中央まで加温養生する。グラウト材の注入が完了してから４８時間が経過するまで加温養生を継続することが好ましい。 Then, start injecting the grout material into the joint 12. Do not preheat the joint 12 before filling with the grout material. After filling with the grout material is completed, operate the submersible pump 66. Warm water is sent from the water supply pipe 68 through the water supply inlet 54 to the warm water passage 58, and is returned to the container 62 from the drain pipe 70 through the drain outlet 56, circulating the warm water along the warm water passage 58 and heating the area around the joint 12. This allows heating and curing to be performed up to the center of the inside of the joint of the precast concrete member 10. It is preferable to continue heating and curing until 48 hours have passed since the injection of the grout material is completed.

この方法によれば、送り込んだ温水によって、プレキャストコンクリート部材１０間の目地部１２の表面から内部までグラウト材を安定して加温養生することができる。これにより、安定した強度発現を得ることができる。特に、冬季のグラウト工事における初期強度発現の遅延やそれに伴う工程の遅延、品質の確保に寄与することができる。 According to this method, the grout material can be stably heated and cured from the surface to the inside of the joints 12 between the precast concrete members 10 by pumping in hot water. This allows for stable strength development. In particular, this method can contribute to preventing delays in initial strength development and associated process delays in grouting work in winter, and ensuring quality.

以上説明したように、本発明に係るグラウト加温養生方法によれば、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する方法であって、グラウト材を注入する前に目地部を養生枠で覆い、目地部と養生枠の間に加温空気を送り込んで目地部の内部を予め加温した後、グラウト材を注入し、その後、目地部と養生枠の間に加温空気または温水を送り込むので、送り込んだ加温空気によって、プレキャストコンクリート部材間の目地部の表面から内部までグラウト材を加温養生することができる。 As explained above, the grout heating and curing method of the present invention is a method for heating and curing the grout material injected into the joints formed between precast concrete members. Before injecting the grout material, the joints are covered with a curing frame, heated air is pumped between the joints and the curing frame to preheat the inside of the joints, the grout material is then injected, and heated air or hot water is pumped between the joints and the curing frame. This allows the grout material to be heated and cured from the surface to the inside of the joints between the precast concrete members by the pumped heated air.

また、本発明に係る他のグラウト加温養生方法によれば、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する方法であって、目地部を養生枠で覆った後、目地部にグラウト材を注入し、その後、目地部と養生枠の間に温水を送り込んで養生するので、送り込んだ温水によって、プレキャストコンクリート部材間の目地部の表面から内部までグラウト材を加温養生することができる。 In addition, another grout heating and curing method according to the present invention is a method for heating and curing the grout material injected into the joints formed between precast concrete members, in which the joints are covered with a curing frame, the grout material is injected into the joints, and then warm water is pumped between the joints and the curing frame to cure them. The pumped warm water allows the grout material to be heated and cured from the surface to the inside of the joints between the precast concrete members.

また、本発明に係るグラウト加温養生装置によれば、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する装置であって、目地部を覆う養生枠と、目地部と養生枠の間に加温空気を送り込んで目地部の内部を予め加温する加温空気供給手段とを備えるので、送り込んだ加温空気によって、プレキャストコンクリート部材間の目地部の表面から内部までグラウト材を加温養生することができる。 The grout heating and curing device according to the present invention is a device that heats and cures the grout material injected into the joints formed between precast concrete members, and is equipped with a curing frame that covers the joints and heated air supply means that preheats the inside of the joints by sending heated air between the joints and the curing frame, so that the grout material can be heated and cured from the surface to the inside of the joints between the precast concrete members by the sent heated air.

また、本発明に係る他のグラウト加温養生装置によれば、プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する装置であって、目地部を覆う養生枠と、目地部と養生枠の間に温水を送り込んで目地部の内部を加温する温水供給手段とを備えるので、送り込んだ温水によって、プレキャストコンクリート部材間の目地部の表面から内部までグラウト材を加温養生することができる。 Another grout heating and curing device according to the present invention is a device that heats and cures the grout material injected into the joints formed between precast concrete members, and is equipped with a curing frame that covers the joints and a hot water supply means that pumps hot water between the joints and the curing frame to heat the inside of the joints, so that the pumped hot water can heat and cure the grout material from the surface to the inside of the joints between the precast concrete members.

以上のように、本発明に係るグラウト加温養生方法および養生装置は、プレキャストコンクリート部材の接合部のグラウト材の養生に有用であり、特に、グラウト材の強度発現を促進させるのに適している。 As described above, the grout heating and curing method and curing device of the present invention are useful for curing grout material at the joints of precast concrete members, and are particularly suitable for promoting the development of strength in the grout material.

１０ プレキャストコンクリート部材
１２ 目地部
１４ 耐熱養生シート（養生枠）
１６ 加温空気供給手段
１８ バンド
２０ 空気通路
２２ 給気口
２４ 排気口
２６ 温風発生器
２８ 温風供給管
３０ 目地型枠
３２ 治具
３４ 断熱材一体木製枠（養生枠）
４４ 温水養生枠（養生枠）
６０ 温水供給手段
１００～３００ グラウト加温養生装置 10 Precast concrete member 12 Joint 14 Heat-resistant curing sheet (curing frame)
Reference Signs List 16 Heated air supply means 18 Band 20 Air passage 22 Air supply port 24 Exhaust port 26 Hot air generator 28 Hot air supply pipe 30 Joint formwork 32 Jig 34 Insulation material integrated wooden frame (curing frame)
44 Hot water curing frame (curing frame)
60 Hot water supply means 100-300 Grout heating and curing device

Claims (2)

プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する方法であって、
グラウト材を注入する前に目地部を養生枠で覆い、目地部と養生枠の間に加温空気を送り込んで目地部の内部を予め加温した後、グラウト材を注入し、その後、目地部と養生枠の間に加温空気または温水を送り込むことを特徴とするグラウト加温養生方法。 A method for heating and curing a grout material to be injected into a joint formed between precast concrete members, comprising:
This grout heating and curing method is characterized in that before injecting grout material, the joint is covered with a curing frame, heated air is sent between the joint and the curing frame to preheat the inside of the joint, the grout material is then injected, and heated air or hot water is sent between the joint and the curing frame. プレキャストコンクリート部材間に形成された目地部に注入されるグラウト材を加温して養生する方法であって、
目地部を養生枠で覆い、目地部の内部を予め加温した後、目地部にグラウト材を注入し、その後、目地部と養生枠の間に温水を送り込んで養生することを特徴とするグラウト加温養生方法。 A method for heating and curing a grout material to be injected into a joint formed between precast concrete members, comprising:
This grout heating curing method is characterized in that the joint is covered with a curing frame, the inside of the joint is preheated , grout material is injected into the joint, and then warm water is pumped between the joint and the curing frame to cure it.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001260111A (en) 2000-03-21 2001-09-25 Haneda Hume Pipe Co Ltd Method for manufacturing concrete secondary product
JP2002303001A (en) 2001-04-05 2002-10-18 Taisei Corp Method for building jointing section
JP2004027572A (en) 2002-06-24 2004-01-29 Taisei Corp Curing device for cement mixing material and its use
JP2009079428A (en) 2007-09-26 2009-04-16 Kajima Corp Joint method of concrete members and manufacturing method of floor slab for prestressed concrete bridge
JP2014163108A (en) 2013-02-25 2014-09-08 Takenaka Komuten Co Ltd Precast junction structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001260111A (en) 2000-03-21 2001-09-25 Haneda Hume Pipe Co Ltd Method for manufacturing concrete secondary product
JP2002303001A (en) 2001-04-05 2002-10-18 Taisei Corp Method for building jointing section
JP2004027572A (en) 2002-06-24 2004-01-29 Taisei Corp Curing device for cement mixing material and its use
JP2009079428A (en) 2007-09-26 2009-04-16 Kajima Corp Joint method of concrete members and manufacturing method of floor slab for prestressed concrete bridge
JP2014163108A (en) 2013-02-25 2014-09-08 Takenaka Komuten Co Ltd Precast junction structure

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