JP4126262B2 - 充填材入り人工芝における融雪方法 - Google Patents
充填材入り人工芝における融雪方法 Download PDFInfo
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- JP4126262B2 JP4126262B2 JP2003338001A JP2003338001A JP4126262B2 JP 4126262 B2 JP4126262 B2 JP 4126262B2 JP 2003338001 A JP2003338001 A JP 2003338001A JP 2003338001 A JP2003338001 A JP 2003338001A JP 4126262 B2 JP4126262 B2 JP 4126262B2
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Description
人工芝への散水設備と人工芝へのヒーティング設備とを併設しておき、降雪開始時若しくは降雪開始前に、前記充填材層が湿潤度70〜150%の状態となるまで散水を行い、ヒーティングを行うことを特徴とする充填材入り人工芝における融雪方法が提供される。
図1は本発明が適用されるサッカー競技場の平面図であり、図2は人工芝の構造断面図である。
図3に示されるように、実験用に1300mm×1000mm×150mmのパレット状の模型台31を製作し、底面に電熱線32(銅ニッケル合金線 100V)を敷設し(電熱量250W/m2)、その上面側に厚さ50mmの透水性コンクリート33を打設し、さらにその上面にパイル高50mmの人工芝34(フィールドターフ社製)を敷設し、珪砂+ゴムチップからなる充填材を33mm厚で充填した。また、温度計測用に熱電対35を透水コンクリートの下面位置(加温位置)および充填材下面位置および充填材上面位置にそれぞれ設置した。
充填材の湿潤度を乾燥状態(湿潤度0〜10%程度)と飽和湿潤状態(湿潤度100%程度)とした2ケースについて、前記電熱線により250W/m2の熱量を与え、熱電対配設位置毎に温度上昇経過を測定した。その結果を図4に示す。なお、図中、実線が加温位置の温度上昇線であり細線側が乾燥状態、太線側が飽和湿潤状態を示し、波線が充填材下面位置の温度上昇線であり細線側が乾燥状態、太線側が飽和湿潤状態を示し、一点鎖線が充填材上面位置の温度上昇線であり細線側が乾燥状態、太線側が飽和湿潤状態を示している。
実験(その2)では、上記乾燥状態と飽和湿潤状態の他、中間の湿潤状態の温度特性を見るため、50%湿潤度をケースとして加え、それぞれの温度上昇特性を調べた。なお、加温位置の温度測定について試験結果から除き、充填材の上面位置温度と下面位置温度とについて行った。その結果を図5に示す。
Claims (4)
- 基布に植設されたパイル間に粒状の充填材が投入された充填材入り人工芝における融雪方法であって、
人工芝への散水設備と人工芝へのヒーティング設備とを併設しておき、降雪開始時若しくは降雪開始前に、前記充填材層が湿潤度70〜150%の状態となるまで散水を行い、ヒーティングを行うことを特徴とする充填材入り人工芝における融雪方法。 - 降雪検出手段として降雪センサを配設し、降雪を検知すると同時に前記充填材層が湿潤度70〜150%の状態となるまでの散水と、ヒーティングとを行うようにする請求項1記載の充填材入り人工芝における融雪方法。
- 降雪予測情報に基づき、降雪開始前に前記充填材層が湿潤度70〜150%の状態となるまでの散水と、ヒーティングとを行うようにする請求項1記載の充填材入り人工芝における融雪方法。
- 前記充填材を砂とした人工芝、または前記充填物を砂及びゴムチップとした人工芝を対象として融雪を行う請求項1〜3いずれかに記載の充填材入り人工芝における融雪方法。
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