To provide a vertical direction water permeability test device equipped with an intrusion distance decision mechanism of an unagitated sample taken in.
The intrusion distance decision mechanism provided with an intrusion distance decision mechanism of a water permeation structure at the vicinity of the top end of an inner tube for taking in the unagitated sample comprises a unit pipe fixed to the inside of the inner pipe, an upper spacer stored in the unit pipe, a lower spacer having the bottom with the water permeable structure stored in the unit pipe by making an elastic body intervene between the elastic body placed between the upper spacer and the upper end section of the unit pipe and the upper spacer and a touch sensor operated by a displacement transfer rod telling the displacement of the upper spacer. The touch sensor is connected with a receiving device installed on the ground with a signal cable.
AOKI MASAMICHI
SHIMIZU TAKAAKI
MORI KUNIMITSU
INUI KAZUYUKI
TAKENAKA YASUAKI
ITO NAOSHI
YOSHIDA TADASHI
TOKYO SOIL RES CO LTD