A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CONFIRMATION METHOD OF GROUND IMPROVEMENT EFFECT
To provide a confirmation method of a ground improvement effect capable of predicting an improvement effect at a specific position with high accuracy.SOLUTION: A confirmation method of an improvement effect of a ground into which a chemical liquid is injected comprises: a step S2 of investigating a state of the ground into which a chemical liquid is injected by an acoustic tomography survey; a step S3 of extracting candidates for reinjection places where shortage of improvement is estimated from an investigation result of the acoustic tomography survey; a step S4 of installing an injection pipe so as to enable the chemical liquid to be injected into the candidates for reinjection places; a step S6 of measuring an injection pressure together with injecting the chemical liquid at a constant injection speed via the injection pipe (a step S5); and a step S7 of estimating a water permeability coefficient that is the improvement effect of the candidates for reinjection places from the injection speed and the injection pressure.SELECTED DRAWING: Figure 1
【課題】特定位置の改良効果を精度よく予測することが可能となる地盤の改良効果の確認方法を提供する。【解決手段】薬液注入がされた地盤の改良効果の確認方法である。そして、薬液注入地盤の状態を音響トモグラフィ探査によって調査するステップＳ２と、音響トモグラフィ探査の調査結果から改良不足が推定される再注入候補箇所を抽出するステップＳ３と、再注入候補箇所に薬液の注入が可能となるように注入管を設置するステップＳ４と、注入管を介して一定の注入速度で薬液を注入する（ステップＳ５）とともに、注入圧力を測定するステップＳ６と、注入速度及び注入圧力から再注入候補箇所の改良効果となる透水係数を推定するステップＳ７とを備えている。【選択図】図１
CONFIRMATION METHOD OF GROUND IMPROVEMENT EFFECT
To provide a confirmation method of a ground improvement effect capable of predicting an improvement effect at a specific position with high accuracy.SOLUTION: A confirmation method of an improvement effect of a ground into which a chemical liquid is injected comprises: a step S2 of investigating a state of the ground into which a chemical liquid is injected by an acoustic tomography survey; a step S3 of extracting candidates for reinjection places where shortage of improvement is estimated from an investigation result of the acoustic tomography survey; a step S4 of installing an injection pipe so as to enable the chemical liquid to be injected into the candidates for reinjection places; a step S6 of measuring an injection pressure together with injecting the chemical liquid at a constant injection speed via the injection pipe (a step S5); and a step S7 of estimating a water permeability coefficient that is the improvement effect of the candidates for reinjection places from the injection speed and the injection pressure.SELECTED DRAWING: Figure 1
【課題】特定位置の改良効果を精度よく予測することが可能となる地盤の改良効果の確認方法を提供する。【解決手段】薬液注入がされた地盤の改良効果の確認方法である。そして、薬液注入地盤の状態を音響トモグラフィ探査によって調査するステップＳ２と、音響トモグラフィ探査の調査結果から改良不足が推定される再注入候補箇所を抽出するステップＳ３と、再注入候補箇所に薬液の注入が可能となるように注入管を設置するステップＳ４と、注入管を介して一定の注入速度で薬液を注入する（ステップＳ５）とともに、注入圧力を測定するステップＳ６と、注入速度及び注入圧力から再注入候補箇所の改良効果となる透水係数を推定するステップＳ７とを備えている。【選択図】図１
CONFIRMATION METHOD OF GROUND IMPROVEMENT EFFECT
地盤の改良効果の確認方法
NAKAJIMA TAKUYA (author) / NAKAYAMA TAKASHI (author) / SAWADA AKIRA (author)
2020-10-15
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
| European Patent Office | 2021
CONFIRMATION METHOD OF AGITATING/MIXING STATUS IN GROUND IMPROVEMENT BODY
| European Patent Office | 2022
SUPPORT LAYER CONFIRMATION METHOD AND FOUNDATION IMPROVEMENT METHOD
| European Patent Office | 2018
EFFECT CONFIRMATION METHOD OF FOUNDATION STRUCTURE FOR COUNTERMEASURE AGAINST EXPANSIVE GROUND
| European Patent Office | 2018
GROUND IMPROVEMENT DEVICE, GROUND IMPROVEMENT SYSTEM, AND GROUND IMPROVEMENT METHOD
| European Patent Office | 2020