ce221 MidtermExam spring 04 - Calpoly State University-SLO...

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Unformatted text preview: Calpoly State University-SLO Civil & Environmental Engineering CE 221 A . .Mid—term Exam 04/13/2 Name 1 j i a Q. 1 To design a flexible pavement using AASHTO method of design, the structural number of subgrade, subbase and base layers was determined to be 4.2, 3.1 and 2 1 respectively. The elastic moduli of Asphalt concrete, base layer and subbase layer Were 350,000 psi, 50,000 psi, and 20, 000 psi, respectively. If drainage quality IS “fair” and pavement sublayers remain saturated 15% of the time, determine the layers thicknesses. .._. {“1 1 M5_ - . 4 0. SN' 2' 'l/5Nz ’y‘ SN? 4 2/ 'L SN“: «[31 44102mzt “war-‘5 (i. 2 -0 DES-031$» t]. 3.; bay zoo ewes: Get 1591“”? "- P ‘ will“ ’3‘” bN‘r‘l. 536N540)” “'43) mquysw T. OflpjrS / , i- ‘4'?“ Li 93 4;?- qufllllofilb” . ND"; 11: (JV: 5N5$N1*t3“‘t**3“5 015’; DmHW‘iMZDPM"“M 0 V\‘ 4.0% fi-E’ by“ \0 / PALLL—Lfiu w . . 91‘ £24.; ___‘L 1 5dr [My SN)“: 30;*- L.3}§)(ifi)t¢/&j 3‘52 a! 1 314:" /? ”F- VIE-{ii} .; DZ: M _; 51.1.- 2.15' u’i,;~'r: “refill Julia 3N1 —SH‘¥ +azim1DZ-H -. 6!sz (145514) ‘ W433 e . ' 2.154-(1115M‘1HEM 3 l1 g 3" "S"+-15l1l :1 “3|; cruii S‘N {651: ”Ma 1?: U D1 1 z H.114)...” ' S U \’ j :3.I{+|.1;4)t"\di‘fi‘/ ’3 “up .351 Q. 2 In cor‘f’dfiaing a traifi'ggdidy an aerial photo showed 5 vehicles on a 110- meter long section of a highway. The speeds were measured and were as follows. 55, 60, 65,50 and 62 km/hr. Determine the following: (11) Density (k), veh/l'cm, (b) The flow (q), veh/hr ,(c) the average time headway (sec) and (d) the distance headway (m). 0 av- 12:. - «1“ I 4245121 ‘/ T ":E‘" :51: 7"“ 32551“ M __ 39 Go 1*. “is 1‘1 1:. H4545 J iii—3.6M S ____________,__._..._ T) Lacy—101,1 ue+ec+ 1323 5%4kw1fh _ 0'6!” 1:2,, = 9‘61“! "32??? were _-‘_£_l z-T-L J-«mmxatpm‘ 535cc ,. a? rlcd ‘ ”b A11 db 25%MI ”v /fl..-.i 175,4 6M3“? WM“ I A” ‘l girl-i s' " ‘ "‘ i" .4 = .zzlem: d) 71- v. 1. {av-*4 thaw-"dmluwsl 00...... . . :Lzlfl m ”’7 Q.3 The following earthwork areas were calculated. The shrinkage ratio for this type of material was determined to be 11%. Determine the excess fill needed for this project. 20+00 _— 20+60 110.6 21+00 —— 21+55 " 21+90 Tol"F\LL‘- I'f),lUM-‘i?>‘“"3 TM curt 8.25mi? m3 Wine, 7_2:_\ we: +3_;ii5$_ all « ififiimflzm we) a $445 ms em, = 15W [55): 23%.2‘5.‘ W 2 z / UT "‘ [60‘w2i) 3 6111.3“)? M J 20H“) {Elton Q M- 3 / { WWW-“31% Um ants M5 _,_Z_lt§:>_*:__ia:"_!9. MM; ' , a 10.5X35) a me / nu, ("HEM \prs El +610"? 27455 \‘0 cm == (sum Hat-3.? (552 2555.72: arr = (sashgggfl max-i.» Mane z, wees mu a salute. a -— 23.2w. wit — . m = 7+stth 15 m“ Q.4 Determine the minimum radius of a horizontal e require or a 2-lane highway if the design speed is 112 km/h and the superelevation rate is 0.08. If the highway will have the standard lane width, determine the length of transition curve (superelevation runoff). 2:: V?” = Lli2)L ‘, ”ilalflalbm ' MBH'TO min €= [055' 511—413 IZIHJI not?) U: 100 De “1200(5.lp\){.08)"" 5’+.tom —-r 30m rL] "an...— .m— (2.5 Given the profile below, determine the length of the vertical curve needed to make the highest point on the vertical curve come out exactly over the centerline of the cross road at station 150+70. Also, determine the clearance between the centerline of the cross road and the vertical curve profile. Pl": \504 "to r: ’M5"—l49 = '1 -; r L L— .- gvc-«z 9.1+ le. q L L12) 2 Elevation 37.50 43: 110+uletL-g-(m r , ...
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