| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum soil testing machine allowing an easy and accurate grasp of the soil quality of the improved ground. SOLUTION: This vacuum soil testing machine is provided with a casing 12 for enclosing a specimen S extracted from the improved ground, in an airtight state; a drain member 15 inserted in the specimen S; and a vacuum pressure generating means connected to the drain member 15 and loading vacuum pressure to the specimen S through the drain member 15. The vacuum soil testing machine is further provided with a measuring device 22 for measuring the drainage quantity of pore water discharged from the specimen when loading the vacuum pressure by the vacuum pressure generating means; a measuring device 22 for measuring the weight change of the specimen S; measuring devices 23, 25 for measuring pore water pressure in the specimen and the outer dimensional change of the specimen S; and a measuring device 18 for measuring vacuum pressure in the specimen S.
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