Philadelphia University

Faculty of EngineeringDept. of Civil Eng.

Student Name:

Student Number:FINAL EXAM

Q-1; ' ,

Answer onlv four questions

( 10- marks)

If the failure principal stresses that act on a clay element areorr = 350 kPa , o31= 149.5 kPa what will be the amount ofcohesion (C) ofthe clay.Given; O=120, S=C* ootan O

Q-2; ( 4x2.5 - 10 marks)

A wall footing of B = 3 m. is resting on a saturated clay layeras shown in Fig. Find;

a- the allowable bearing capacity for this footing.b- the maximum load (P) that can safely be carried by this footing:c- the amount of elastic settlement due to q"n .d- the amount of consolidation settlement due to q"n .

Given; S" = qB I* (1- p1l ES" = ((C" H) / (1+e) Log (o''o + q) / o"og u r t = c N . + o " N q + 0 . 5 y B N y

c =35 kParN.=11 . , No=4, f l r= ! . !

W,T

Course Title: Foundation EngineeringCourseNo: (0670531)Lecturer: Prof. Fouad

Date : 5-6-2016Time Allowed: 2 HourNo. of Pases: 2

r- {Y},,:'s''s' q'

h=yf '-!: lo*' 'u, c"=o.!z e €a=o.75

R."ok

( 10- marks)Q-3;

Select a suitable dimensions (B and t ) for a square footing that

support a columns of (0.4x0.4)m. section and subjecting to

Pa = 0.8 MN and Pr = o.5 MN.

Given; q"u = 100 kPa, f. = 30 llPa , Vn =(0.75 (f.)x / 3) bd

Q-a; ( 2xS:10 marks)

a- Justify the following;1- Prior to compaction, the soil is placed in layers, the thickness

of each do not exceed (30) cm.2- Vibratory compactors are usually employed to compact

sandy soil.

b- Check the safety of a slope (i = 220) made of saturated sandwhich has O = 320 and saturated density = 18.2 kN/ m3.Will the slope be safe if it is subjecting to seepage pressure ? why

Vd b-^ jz

8*"b bar^ t'L

Q-5: (2x5 = 10 marks)

The wall presented in Fig. retains sandy soil and subjectingto lateral toading (P = 100 kru/fU). fiird;1- Vr

2- the maximum bending moment that acts on the wall section.

Due to active failure

?=1sp K^l

t =tz kr/i

;

FT". / Ee-,,*.Cs /€ /aarc)

B __ 4-Fs - 35o- t49 s' = too.ti2

02= 6+o's -z

5= f? c-? ?

0) = o-e._ R.

5=-cf o-x1..^-*2:-2

7oe

Yq.6 uvYb = 17. 4-Q.l = ?'6

kPo

U-2) - "'

. l

l-J= 4'a

Hr I

f i t t

2

3J2!!U,t -_ 24e.7 t2

: /oo.25 C, 12 = g8.5:€ K:P^

5a t2 - ' 22 8.9 ' /c P^

. t,P.= 434

lcPa

lcpn

6n, f.^to

TPfr>t

?al= ctVc+ o:s

" ' : C= 35 2 Nc = l l2

7a/ = srCrt)+ o''(e'dG>Q'2)i ,+= 385 1t7'29

'= 102'28L M '

lc%

-+ \st = e# = t34't

+ 5e= ts4.tG) #-Cs)= a-0227 r*

s^_e.H 4oy..xo," t - '=- i7-e. - l ^6vo(n = 2'6Cz)=': ' :

$='io'tQ =so'+t

= !,,t2L4L 7!, tg,z+tu'ac ol+o.75 - . ' / ,?,2

/c ls4

\-- -,./

fra' ' , ..,..

n a ' t I

'ffJ ,( ntle, I'J;1

oJ n /7fr "l s" .9

a-t-

,s ,..-lJ J.-,,-,,JJ

tta lt Ur*r'zon'

f4.

4Z- sa, J .itJr^A" b's,;-y"41 tens./ttr/1

bl s.F = lr:* = :'f:4 = /,r4t >/.s o.kfcq ti o,101-

4ti^/'r Se,Tar.s,p, = yb

"i; Q't<4 ( dt = t8.2-78'=s,4)

= g'4

?'sat) =o'7/3 < l ' , N' G 't 7,2

,5/

l t _ ,.-5' ,"3f _o,42(7 :o,27tl*5,.3.r 1,5716

- &v lc '^ = 8Z k* == 4,6o7 Z

Z=o + iA ="7= 8 a 6A = 4' to7 (s). , ' ' 36' 85

'-V'= *(a4silL8) : r4r't2 (uV."- l4'f,42 - toa = 47"'42 /c'u

M ̂ ".?. /*/u ,! z"-" - slr'. Pt' /' :'

e'= too - t4 k- =- /po - ?',s6 s Z'

> Z'=i# =43.4t + Z= 6'sgg*

F4^-.x = too (?*g.s1t) = 43?,> teu''* '/^^-

k*

4.*

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