| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem of deteriorated effect of preventing scattering if sand is allowed to pile on a pavement of gravel laid with effort because of a possibility of natural fine-particle sand flying in with the trade wind, in addition to a possibility of weights of people and vehicles driving laid gravel into the ground to allow rise of the sand under the pavement of the laid gravel. <P>SOLUTION: Construction sites are periodically patrolled to select time for an original condition recovery work and carry out the work. Date/time of the work of the site is determined on site in accordance with characteristics of the region and land form. A responsible person at the site considers the timing to clean the gravel and sands on the site, thereby recovering the scattering prevention effect. <P>COPYRIGHT: (C)2012,JPO&INPIT |
