A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
GROUND IMPROVEMENT METHOD, GROUND IMPROVEMENT STRUCTURE AND IMPROVED GROUND
PROBLEM TO BE SOLVED: To provide a ground improvement method, a ground improvement structure and an improved ground, which can improve earthquake resistance of an underground structure by restricting occurrence of liquefaction.SOLUTION: In a desaturation maintenance process #200, as shown in (A), a penetration hole that penetrates an underground structure S is formed, and an agent is injected in a liquefaction layer Lbelow the underground structure S, then a wall part 3a is constructed by curing the agent. In a desaturation treatment process #300, as shown in (B), ground water is discharged from the liquefaction layer Lbelow the underground structure S, and underground moisture in the liquefaction layer Lis removed by lowering the underground water level GWL of the liquefaction layer L. In the desaturation treatment process #300, air is supplied to the liquefaction layer Lbelow the underground structure S to force the air to be included in the soil of the liquefaction layer L, and the desaturation treatment is applied to the liquefaction layer Lbelow the underground structure S. As a result, as shown in (C), a desaturation region A is formed in the liquefaction layer Lbelow the underground structure S.SELECTED DRAWING: Figure 3
【課題】液状化の発生を抑止して地下構造物の耐震性を向上させることができる地盤改良工法、地盤改良構造及び改良地盤を提供する。【解決手段】不飽和化維持工程＃２００では、（Ａ）に示すように、地下構造物Ｓを貫通する貫通孔を形成し、地下構造物Ｓよりも下層の液状化層Ｌ1に薬剤を注入して、この薬剤を硬化させて壁部３ａを構築する。不飽和化処理工程＃３００では、（Ｂ）に示すように、地下構造物Ｓよりも下層の液状化層Ｌ1から地下水を排出して、液状化層Ｌ1の地下水位GWLを下げて液状化層Ｌ1の土中から水分が除去される。また、不飽和化処理工程＃３００では、地下構造物Ｓよりも下層の液状化層Ｌ1に気体を供給して、液状化層Ｌ1の土中に気体が封入された状態にし、地下構造物Ｓよりも下層の液状化層Ｌ1が不飽和化処理される。その結果、（Ｃ）に示すように、地下構造物Ｓよりも下層の液状化層Ｌ1に不飽和域Ａが形成される。【選択図】図３
GROUND IMPROVEMENT METHOD, GROUND IMPROVEMENT STRUCTURE AND IMPROVED GROUND
PROBLEM TO BE SOLVED: To provide a ground improvement method, a ground improvement structure and an improved ground, which can improve earthquake resistance of an underground structure by restricting occurrence of liquefaction.SOLUTION: In a desaturation maintenance process #200, as shown in (A), a penetration hole that penetrates an underground structure S is formed, and an agent is injected in a liquefaction layer Lbelow the underground structure S, then a wall part 3a is constructed by curing the agent. In a desaturation treatment process #300, as shown in (B), ground water is discharged from the liquefaction layer Lbelow the underground structure S, and underground moisture in the liquefaction layer Lis removed by lowering the underground water level GWL of the liquefaction layer L. In the desaturation treatment process #300, air is supplied to the liquefaction layer Lbelow the underground structure S to force the air to be included in the soil of the liquefaction layer L, and the desaturation treatment is applied to the liquefaction layer Lbelow the underground structure S. As a result, as shown in (C), a desaturation region A is formed in the liquefaction layer Lbelow the underground structure S.SELECTED DRAWING: Figure 3
【課題】液状化の発生を抑止して地下構造物の耐震性を向上させることができる地盤改良工法、地盤改良構造及び改良地盤を提供する。【解決手段】不飽和化維持工程＃２００では、（Ａ）に示すように、地下構造物Ｓを貫通する貫通孔を形成し、地下構造物Ｓよりも下層の液状化層Ｌ1に薬剤を注入して、この薬剤を硬化させて壁部３ａを構築する。不飽和化処理工程＃３００では、（Ｂ）に示すように、地下構造物Ｓよりも下層の液状化層Ｌ1から地下水を排出して、液状化層Ｌ1の地下水位GWLを下げて液状化層Ｌ1の土中から水分が除去される。また、不飽和化処理工程＃３００では、地下構造物Ｓよりも下層の液状化層Ｌ1に気体を供給して、液状化層Ｌ1の土中に気体が封入された状態にし、地下構造物Ｓよりも下層の液状化層Ｌ1が不飽和化処理される。その結果、（Ｃ）に示すように、地下構造物Ｓよりも下層の液状化層Ｌ1に不飽和域Ａが形成される。【選択図】図３
GROUND IMPROVEMENT METHOD, GROUND IMPROVEMENT STRUCTURE AND IMPROVED GROUND
地盤改良工法、地盤改良構造及び改良地盤
NAKAYAMA TAKASHI (author) / SAWADA AKIRA (author) / SHIMIZU MITSURU (author) / SAITO TAKASHI (author) / FUJIWARA TORASHIRO (author) / NAITO KEISUKE (author) / KOYAMA YUKINORI (author) / KONDO MASAHIRO (author) / SAKAMOTO HIROAKI (author)
2016-12-08
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
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Gründungen
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