METHOD FOR MEASURING SOIL DRY DENSITY AND METHOD AND APPARATUS FOR DETERMINING DEGREE OF SOIL COMPACTION

摘要

PROBLEM TO BE SOLVED: To provide a soil dry density measuring method capable of measuring the dry density of soil of various locations in a construction site speedily than before.;SOLUTION: A curve of dry density vs. volume water content is previously created for specifying the correlation between dry density vs. volume water content on a plurality of types of test samples having different degrees of compaction and prepared from soil collected from the construction site in the first process. Electromagnetic waves are transmitted through soil of the construction site to measure the volume water content of the soil of the construction site on the basis of the relation between impedances when the electromagnetic waves are transmitted through the soil and when they are transmitted through a vacuum in the second process. The volume water content measured in the second process is collated with the previously created curve of dry density vs. volume water content to estimate the dry density of the soil of the construction site in the third process. By repeating the second process and the third process, it is possible to measure the dry density of soil of various locations in the construction site.;COPYRIGHT: (C)2007,JPO&INPIT