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METHOD FOR ESTIMATING LONG-TERM STRENGTH OF CHEMICAL IMPROVED SOIL
To provide a method for estimating long-term strength of chemical improved soil which efficiently and economically verifies long-term strength of improved soil by a chemical injection method, can confirm permanent quality assurance in a permanent grout, and can estimate long-term strength in a neutral/acidic injection material.SOLUTION: A method for estimating long-term strength of a sand gel by an active silica colloid-based, active composite silica-based or neutral/acidic grout defines an independent variable as a normalization material age (day/day) obtained by dividing curing days by solidification time and defines a design parameter relating to the grout as a dependent variable, and estimates long-term strength by regression analysis. As the design parameter, uniaxial compressive strength, liquefaction strength, a deformation coefficient and adhesive force can be used. The method confirms that improvement effect of the structure limiting a service period can be secured for a predetermined period on the basis of the estimated long-term strength, and determines blending of an injection material.SELECTED DRAWING: Figure 11
【課題】薬液注入工法により改良土の長期的な強度の検証を効率良く、経済的に行うことを目的として、恒久グラウトにおいては恒久的な品質確保を確認でき、また中性・酸性系注入材においては長期強度を推定することができる薬液改良土の長期強度の推定方法を提供する。【解決手段】活性シリカコロイド系、活性複合シリカ系、または中性・酸性系のグラウトによるサンドゲルの長期強度を推定する方法として、独立変数を養生日数を固化時間で除した正規化材令（日/日）と定義し、グラウトに関する設計パラメータを従属変数として、回帰分析によって長期強度を推定する。設計パラメータとしては、一軸圧縮強さ、液状化強度、変形係数、粘着力などを用いることができる。また、供用期間が限定される構造物に関し、推定された長期強度に基づいて、所定の期間改良効果が確保できることを確認し、注入材の配合を決定する。【選択図】図１１
METHOD FOR ESTIMATING LONG-TERM STRENGTH OF CHEMICAL IMPROVED SOIL
To provide a method for estimating long-term strength of chemical improved soil which efficiently and economically verifies long-term strength of improved soil by a chemical injection method, can confirm permanent quality assurance in a permanent grout, and can estimate long-term strength in a neutral/acidic injection material.SOLUTION: A method for estimating long-term strength of a sand gel by an active silica colloid-based, active composite silica-based or neutral/acidic grout defines an independent variable as a normalization material age (day/day) obtained by dividing curing days by solidification time and defines a design parameter relating to the grout as a dependent variable, and estimates long-term strength by regression analysis. As the design parameter, uniaxial compressive strength, liquefaction strength, a deformation coefficient and adhesive force can be used. The method confirms that improvement effect of the structure limiting a service period can be secured for a predetermined period on the basis of the estimated long-term strength, and determines blending of an injection material.SELECTED DRAWING: Figure 11
【課題】薬液注入工法により改良土の長期的な強度の検証を効率良く、経済的に行うことを目的として、恒久グラウトにおいては恒久的な品質確保を確認でき、また中性・酸性系注入材においては長期強度を推定することができる薬液改良土の長期強度の推定方法を提供する。【解決手段】活性シリカコロイド系、活性複合シリカ系、または中性・酸性系のグラウトによるサンドゲルの長期強度を推定する方法として、独立変数を養生日数を固化時間で除した正規化材令（日/日）と定義し、グラウトに関する設計パラメータを従属変数として、回帰分析によって長期強度を推定する。設計パラメータとしては、一軸圧縮強さ、液状化強度、変形係数、粘着力などを用いることができる。また、供用期間が限定される構造物に関し、推定された長期強度に基づいて、所定の期間改良効果が確保できることを確認し、注入材の配合を決定する。【選択図】図１１
METHOD FOR ESTIMATING LONG-TERM STRENGTH OF CHEMICAL IMPROVED SOIL
薬液改良土の長期強度の推定方法
SASAKI TAKAMITSU (author) / SHIMADA SHUNSUKE (author)
2023-06-29
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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