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Refer to the 15-ft high embankment shown in Figure 3.8 (page 79). Embankments are generally constructed in several lifts or layers that are compacted according to geotechnical specifications. Each lift thickness is 3 ft and must have a dry unit weight of 120 Ib/ft3. It is known that the soil at the borrow pit has a moist unit weight of 110 Ib/ft3, moisture content of 23%, and Gs-2.66. Perform the following tasks. a. Determine the moist weight of borrow soil needed to construct the first lift (bottom layer) per feet of the embankment. On the day of the construction, there was a heavy rain that caused the borrow pit to reach a near saturated condition. Recalculate the moist weight of the borrow soil needed to construct the first lift. b.

engineering   Civil-Engineering   
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hishl 23 2.6 uS . (ot e 4 e .66 1 62 lte 120 eo382 e3 291 L Lo TR-7562-1-1

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