DRILLING SLURRY, SLURRY TREATMENT FACILITY, DRILLING FACILITY, SLURRY TREATMENT METHOD AND DRILLING METHOD

To provide drilling slurry, a slurry treatment facility, a drilling facility, a slurry treatment method, and a drilling method that can suppress foaming of waste slurry as much as or more than using defoaming agents, while suppressing environmental impact in a slurry shield method and a slurry propu...

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Bibliographische Detailangaben
Hauptverfasser: SAKAMOTO HIROAKI, TAKAMI KOSUKE, MORI SHINICHI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide drilling slurry, a slurry treatment facility, a drilling facility, a slurry treatment method, and a drilling method that can suppress foaming of waste slurry as much as or more than using defoaming agents, while suppressing environmental impact in a slurry shield method and a slurry propulsion method.SOLUTION: Drilling slurry used for a slurry shield method or slurry propulsion method has a specific gravity equal to or more than 1.15 and equal to or less than 1.20. The drilling slurry comprises a funnel viscosity equal to or more than 32 seconds and equal to or less than 42 seconds. The drilling slurry includes clay and bentonite. The drilling slurry has a clay content equal to or more than 0.19 kg/L and equal to or less than 0.31 kg/L. The drilling slurry has a bentonite content equal to or more than 0.06 kg/L and equal to or less than 0.09 kg/L.SELECTED DRAWING: Figure 1 【課題】泥水シールド工法や泥水推進工法において、環境負荷を抑制しつつ、消泡剤を用いた場合と同等以上に排泥水の発泡を抑制することができる掘削用泥水、泥水処理設備、掘削設備、泥水処理方法、および掘削方法を提供する。【解決手段】泥水シールド工法または泥水推進工法に用いる掘削用泥水であって、比重が1.15以上1.20以下である、掘削用泥水。掘削用泥水は、ファンネル粘度が32秒以上42秒以下である。掘削用泥水は、粘土と、ベントナイトと、を含む。掘削用泥水は、粘土の含有量が0.19kg/L以上0.31kg/L以下である。掘削用泥水は、ベントナイトの含有量が0.06kg/L以上0.09kg/L以下である。【選択図】図1