JP6792117B1 - 薬液改良地盤における改良範囲および改良効果の評価手法並びにそれを用いた地盤改良工法 - Google Patents
薬液改良地盤における改良範囲および改良効果の評価手法並びにそれを用いた地盤改良工法 Download PDFInfo
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
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Abstract
Description
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Claims (6)
- 固結を改良原理とする薬液注入工法による地盤改良工事において、改良強度に影響を及ぼさない範囲にて飽和度を低下させることにより、P波速度から注入材の到達範囲と改良強度を把握することを特徴とする地盤の改良評価手法。
- 薬液注入材に気泡を混入した注入材の浸透によって変動する改良対象地盤のP波またはS波と、室内配合試験によって作成された薬液改良体のP波またはS波および一軸圧縮強さとの関係から前記注入材の到達範囲と前記改良対象地盤の改良強度を把握する地盤の改良評価手法において、前記薬液改良体は、拘束圧依存性を考慮して前記改良対象地盤の応力状態と現場密度を再現して作製し、かつB値が0.95以下となるように数種類のシリカ濃度で作製することを特徴とする地盤の改良評価手法。
- 請求項2記載の地盤の改良評価手法において、前記注入材の浸透によって変動するP波を弾性波探査、弾性波速度検層または音響トモグラフィによって測定することにより、前記注入材の到達範囲を把握することを特徴とする地盤の改良評価手法。
- 請求項2または3の記載の地盤の改良評価手法において、前記注入材が浸透固化することに伴う前記S波または前記P波の増加を弾性波探査、弾性波検層または音響トモグラフィによって測定し、前記薬液改良体におけるS波またはP波と一軸圧縮強さとの関係から改良強度を推定することを特徴とする地盤の改良評価手法。
- 請求項2〜4のいずれか一つに記載の地盤改良評価手法において、前記注入材の注入前後の地盤にシリカ含有量の測定を併用することを特徴とする地盤の改良評価手法。
- 請求項2〜5のいずれか一つに記載の地盤の改良評価手法を用いた地盤改良工法。
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JP7055515B1 (ja) | 2021-12-17 | 2022-04-18 | 強化土エンジニヤリング株式会社 | 薬液改良土の長期強度の推定方法 |
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JP4486564B2 (ja) * | 2005-08-19 | 2010-06-23 | 強化土エンジニヤリング株式会社 | 地盤改良効果の確認方法並びにこの方法を用いた地盤注入工法 |
JP2013087572A (ja) * | 2011-10-21 | 2013-05-13 | Railway Technical Research Institute | 薬液注入地盤の効果確認方法 |
JP5092103B1 (ja) * | 2011-11-28 | 2012-12-05 | 強化土株式会社 | 地盤の不飽和化による地盤改良工法および地盤改良装置 |
JP6936751B2 (ja) * | 2018-02-23 | 2021-09-22 | Jfeシビル株式会社 | 地盤情報の取得方法及び装置 |
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