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# Mathcad - HW2 foundations - Problem 1 a Nblow 24 120pcf w...

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Problem 1 a Nblow 24  γ 120pcf  γ w 62.4pcf  z 40ft  zw 10ft  Whammer 140lbf  h 30in  E Whammer h 350 lbf ft  E60 .6E 210 lbf ft  σ γ z z zw ( ) γ w  σ 2.928 10 3 psf Pstd 14.7psi 1.014 10 5 Pa  CN σ Pstd .5  CN 0.85 N1 Nblow CN  b N1 20.406 c c medium Φ f 41 

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Problem 2 qc 50 tonf ft 2 478.803 m s 2 kg cm 2  fsc .5 tonf ft 2  Rf fsc qc  a Rf 0.01 b Gravelly Sand to Sand c γ 18 kN m 3  z 20m  γ w 9.81 kN m 3  zw 2m  σ v ( ) γ z z zw ( ) γ w 3.831 10 3 psf  Φ 45 
Problem 3 Hvane 12in  LL 70  D 4in  PL 20  Tp 80ft lbf  PI LL PL  Tr 10ft lbf  PI 50 Ks 1 D 3 Hvane π D 2 Hvane 2  λ PI ( ) 1.7 .57log PI ( )  λ PI ( ) 0.732 Ks 335.103 in 3 Cupc λ PI ( ) Cup  Cup Tp Ks  b Cupc 301.801 psf a CuRc .732 ( ) 51.566psf ( )  Cup 412.53 psf b CuRc 37.746 psf Cur Tr Ks  St 412.53psf 51.566psf  a Cur 51.566 psf c St 8 c Consistancy soft

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Problem 4 CRU 60in  CR 4 2 6 7 3 1 4 5 1
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Mathcad - HW2 foundations - Problem 1 a Nblow 24 120pcf w...

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