To appropriately and surely confirm the quality of the improved ground without using any device of a complicated structure.
A quality confirmation device includes: a penetration test device 10; and liquefaction strength estimation means 20. The penetration test device 10 includes: a bar-like body part 11 with a tapering tip; a water ejection port 12 disposed in the neighborhood of the tip of the main body 11; a pore water pressure measurement device 13 disposed in the neighborhood of the tip of the body part 11; and a water ejection device (pump 14) for ejecting water into the improved ground from the water ejection port 12. Liquefaction strength estimation means 20 estimates the liquefaction strength of the improved ground on the basis of dissipation time since a pore water pressure reaches from a peak value to a predetermined dissipation state after water is ejected into the improved ground.
HAYASHI MIKIAKI
YAMANOGUCHI HIROSHI
YASUI TOSHIAKI
YAMAUCHI TAKAHIRO
JPH0559715A | 1993-03-09 | |||
JP2005232715A | 2005-09-02 | |||
JP2001193048A | 2001-07-17 | |||
JPS62264207A | 1987-11-17 | |||
JP2001241031A | 2001-09-04 | |||
JP2010059670A | 2010-03-18 |
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