Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
EVALUATION METHOD OF GROUND IMPROVEMENT EFFECT BY CEMENT-BASED GROUND IMPROVEMENT METHOD
To provide an evaluation method allowing evaluation on uniaxial compressive strength of an improved body through measurement of electric specific resistance before and after the improvement without depending on a uniaxial compressive strength test through sampling.SOLUTION: An evaluation method of ground improvement effect comprises: a first step of obtaining, in advance, a first correlation chart between an addition amount of cement-based solidification and a uniaxial compressive strength (qu), and obtaining a second correlation chart between the addition amount of the cement-based solidification and a ratio (Rimp/Runimp) of electric specific resistances; a second step of setting a target ratio (Rk) of electric specific resistances based on the first correlation chart and the second correlation chart; and a third step of determining whether or not a target uniaxial compressive strength (quck) is secured depending on whether or not the ratio (Rimp/Runimp) of the electric specific resistances meets a condition where it is equal to or less than the ratio (Rk) of the electric specific resistances after measuring the electric specific resistances (Rimp, Runimp) through an electric logging method using a penetration hole formed in the ground in a vertical direction each before and after the ground improvement.SELECTED DRAWING: Figure 1
【課題】サンプリングによる一軸圧縮強度試験に依ることなく、改良前後の電気比抵抗の計測によって、改良体の一軸圧縮強度を評価可能とする。【解決手段】事前に、セメント系固化材添加量と一軸圧縮強さ（qu）との第１相関図を得るとともに、セメント系固化材添加量と電気比抵抗の比（Ｒimp／Ｒunimp）との第２相関図を得る第１手順と、前記第１相関図及び第２相関図に基づいて、目標とする電気比抵抗の比（Ｒk）を設定する第２手順と、地盤改良前後にそれぞれ、地盤に縦方向に形成した貫入孔を用いて電気検層による電気比抵抗（Ｒunimp、Ｒimp）を計測し、電気比抵抗の比（Ｒimp／Ｒunimp）が前記目標とする電気比抵抗の比（Ｒk）以下である条件を満たすかどうかで目標とする一軸圧縮強さ（ｑuck）が確保されているかを判断する第３手順とからなる。【選択図】図１
EVALUATION METHOD OF GROUND IMPROVEMENT EFFECT BY CEMENT-BASED GROUND IMPROVEMENT METHOD
To provide an evaluation method allowing evaluation on uniaxial compressive strength of an improved body through measurement of electric specific resistance before and after the improvement without depending on a uniaxial compressive strength test through sampling.SOLUTION: An evaluation method of ground improvement effect comprises: a first step of obtaining, in advance, a first correlation chart between an addition amount of cement-based solidification and a uniaxial compressive strength (qu), and obtaining a second correlation chart between the addition amount of the cement-based solidification and a ratio (Rimp/Runimp) of electric specific resistances; a second step of setting a target ratio (Rk) of electric specific resistances based on the first correlation chart and the second correlation chart; and a third step of determining whether or not a target uniaxial compressive strength (quck) is secured depending on whether or not the ratio (Rimp/Runimp) of the electric specific resistances meets a condition where it is equal to or less than the ratio (Rk) of the electric specific resistances after measuring the electric specific resistances (Rimp, Runimp) through an electric logging method using a penetration hole formed in the ground in a vertical direction each before and after the ground improvement.SELECTED DRAWING: Figure 1
【課題】サンプリングによる一軸圧縮強度試験に依ることなく、改良前後の電気比抵抗の計測によって、改良体の一軸圧縮強度を評価可能とする。【解決手段】事前に、セメント系固化材添加量と一軸圧縮強さ（qu）との第１相関図を得るとともに、セメント系固化材添加量と電気比抵抗の比（Ｒimp／Ｒunimp）との第２相関図を得る第１手順と、前記第１相関図及び第２相関図に基づいて、目標とする電気比抵抗の比（Ｒk）を設定する第２手順と、地盤改良前後にそれぞれ、地盤に縦方向に形成した貫入孔を用いて電気検層による電気比抵抗（Ｒunimp、Ｒimp）を計測し、電気比抵抗の比（Ｒimp／Ｒunimp）が前記目標とする電気比抵抗の比（Ｒk）以下である条件を満たすかどうかで目標とする一軸圧縮強さ（ｑuck）が確保されているかを判断する第３手順とからなる。【選択図】図１
EVALUATION METHOD OF GROUND IMPROVEMENT EFFECT BY CEMENT-BASED GROUND IMPROVEMENT METHOD
セメント系地盤改良工法による地盤改良効果の評価方法
SHIMOZAKA KENJI (Autor:in) / TONE MAKOTO (Autor:in) / ONO YASUTOSHI (Autor:in) / KATO TOSHIHIKO (Autor:in) / MURATA YOSHINOBU (Autor:in) / YASHIMA ATSUSHI (Autor:in) / SAWADA KAZUHIDE (Autor:in)
16.04.2024
Patent
Elektronische Ressource
Japanisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2021
GROUND IMPROVEMENT DEVICE, GROUND IMPROVEMENT SYSTEM, AND GROUND IMPROVEMENT METHOD
| Europäisches Patentamt | 2020