8/19/2019 Problema Practico (1)

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MECÁNICA DE SUELOS BÁSICAPROBLEMA PROPUESTO

The undisturbed soil at a given borrow pit is found to have the following

properties:w = 15%; γ t = 19.04 k !" #; $ s = .&0. The soil fro" this borrow is to be used to'onstru't a rolled fill having a finished volu"e of #( #0 " #. The soil ise)'avated b* "eans of a shovel and du"ped onto tru'ks having a 'apa'it* of #.( " # ea'h. +hen loaded to 'apa'it*, these tru'ks are found to 'ontain, onthe average, a net weight of soil and water e-ual to 5&.(5 k .

n the 'onstru'tion pro'ess, the tru'ks du"p their load on the fill, the "aterial isspread and broken up, after whi'h a sprinkler adds water until the water 'ontentis e-ual to 1(%. The soil and water are thoroughl* "i)ed and then 'o"pa'teduntil the dr* unit weight is e-ual to 1&. ( k !" #.

1. /ssu"ing that ea'h load is a full 'apa'it* load, how "an* tru'k loads arere-uired to 'onstru't the fill

. +hat should be the volu"e of the pit that re"ains in the borrow area,after all the "aterial re-uired for the fill has been re"oved

#. ow "an* litres of water will have to be added per tru'k load, assu"ingthat the "oisture lost b* evaporation during e)'avation, haulage andhandling is negligible

4. f the fill should be'o"e saturated at so"e ti"e subse-uent to the'onstru'tion and does not 'hange volu"e appre'iabl*, what will be itssaturation water 'ontent