PURPOSE: To monitor the time change in the state of the ground real-time by the minimum required equipment, by providing angle measuring devices at the upper and lower parts of piles, which are piled at a specified interval, inputting the output of each angle measuring device to a processor, and analyzing and judging the inputs.
CONSTITUTION: Piles 0, 01, 02... are piled into the ground to be measured at a specified interval. Angle measuring devices are provided at the upper and lower parts of the piles 0, 01, 02... at a specified interval. An Invar line f1 for measuring the horizontal interval between the piles 0, 01, 02... and Invar lines f2 and f3 for measuring the diagonal lengths between the piles are hooked through the angle measuring devices at the applicable positions. The outputs of the angle measuring devices provided on the piles 0, 01, 02... are inputted to a processor, and the displacement of the ground surface is analyzed and judged.
NAKASAKI HIDEHIKO
UEDA TAKAO
AOYANAGI HAYAO
MIKAMI TADAO
KANZAKI YASUSHI
SAKAGUCHI SHUJI
TAKENAKA DOBOKU