METHOD FOR INJECTING AIR INTO GROUND

PROBLEM TO BE SOLVED: To provide a method for injecting air into ground, which enables an unsaturated area to be efficiently formed along with a grasp of a range of the unsaturated area formed in the sand ground.SOLUTION: While air A is injected through an air injection pipe 2 installed in sand grou...

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Hauptverfasser:	MIYOSHI AKIHIRO, FUJII SUNAO, YAMADA NAOYUKI, SAEGUSA HIROYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS SOIL SHIFTING TESTING UNDERGROUND OR UNDERWATER STRUCTURES
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for injecting air into ground, which enables an unsaturated area to be efficiently formed along with a grasp of a range of the unsaturated area formed in the sand ground.SOLUTION: While air A is injected through an air injection pipe 2 installed in sand ground, specific resistance is sequentially detected between electrodes 5 provided in another air injection pipe 2 installed in a slot H in a location away from a slot H where the air injection pipe 2 is installed. It is determined whether or not an unsaturated area is formed in the location where the electrode 5 detecting the specific resistance is installed, on the basis of comparison between the detected specific resistance and a preset threshold value of specific resistance. When it is determined that the unsaturated area is formed, the injection of the air A is finished.