Earthwork and compaction project: The fill for an embankment of a large industri
ID: 1709923 • Letter: E
Question
Earthwork and compaction project: The fill for an embankment of a large industrial facility consists of borrow soil available from a nearby hilly terrain. The borrow sail water content of 7%. Assume the following data for adding water in the fill and compaction. The highway embankmant is to be constructed at the rate of 200 c y/h compacted. a) How many gallons of water must be supplied each hour to increase the water content of the fill soil from 7% in place to 12% optimum condition for compaction? b) How many water tank per hour are needed this job assuming each water tank has 1, 000 gallons maximum capacity? A typical water tank cycle consists of is minutes filling water, 12 minutes having and 8 minutes return time, 20 minutes water spraying time. Assume ss-min/hr efficiency. c) If the compactable fill becomes saturated at a constant volume, what will be its water content? The specified compaction of 90% requires a dry unit weight of 107.4 |b| compacted cubic foot. The specific gravity of soil solid is 2.66.Explanation / Answer
Using the phase relationships the additional amount of water required is found to be 242 galoons which is nearly equal to 968 litres