MERCURY-FILLED SETTLEMENT GAUGE

Abstract

A DESCRIPTION IS GIVEN OF A REMOTE-SENSING, MULTIPLE-POINT, MERCURY-FILLED SETTLEMENT GAUGE DESIGNED FOR MEASURING IN-PLACE SETTLEMENTS. THE GAUGE CONSISTS OF SETTLEMENT UNITS POSITIONED AT LOCATIONS WHERE SETTLEMENT MEASUREMENTS ARE DESIRED AND A MONITORING UNIT LOCATED OUTSIDE OF CONSTRUCTION LIMITS. SETTLEMENT READINGS ARE OBSERVED ON A MERCURY MANOMETER LOCATED AT THE MONITORING SITE AND ARE EQUAL TO THE DIFFERENCES IN INITIAL AND SUBSEQUENT PRESSURE-HEAD READINGS. COMPARISONS OF MEASUREMENTS OBTAINED AT HIGHWAY CONSTRUCTION SITE FROM MERCURY GAUGE SETTLEMENT UNITS AND CONVENTIONAL SETTLEMENT PLATFORMS ARE PRESENTED AND SHOW VERY GOOD AGREEMENT. WITH THE MERCURY GAUGE, A LARGE AMOUNT OF SETTLEMENT INFORMATION CAN BE OBTAINED PER INSTALLATION, AND THE GAUGE DOE NOT HAVE MANY OF THE DISADVANTAGES ASSOCIATED WITH THE SETTLEMENT PLATFORM.