ce221 s06 midterm exam - Calpoly State University-SLO...

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Unformatted text preview: / Calpoly State University-SLO Civil & Environmental EnginA .35». 4 CE 221 Mid-term Exam A A Name: - 7 A“ —‘._—‘r‘ Section:__0 _2_ Q.1 Determine the x-sectional area of the following earthwork section using coordinate method: ' (20, 10.5) (30, 10.8) (18.2, 8.0 (25, 7.5) (33, 6.7) [200”- WV + ?D(én- ’o‘fl + ssh—10.2) v + 27(7. 5 ~— 4.7) + 35(77 -—=a) + 21,; (5.0—7.5) + v3.2 (rorsl- $7>j\ & \ VZW§(§Q ‘ 1W ’5‘?‘( 4- alvé —- ‘7. g + /o,'75‘ “4 372.7(5)) I: /§(-s¢v.'7=r>2 : Man 51:55:?! :5 .267. azo my“ 1 i m \ N’NAWM nun-um» Q.2 A horizontal curve with a radius of 450-m and A = 35°, if the P.I-. station is 150+50, determine the following: station of TC, station of CT, the deflection angle and the chord 4 length at station 150+40 )2 : kt {a A = 35 ° {>1 : 5+ ’5'04'5'0 L ’i d 21r(~4503(3s‘> A , L : gm - -W‘im ' , 5+“ a‘ TC. : (150+ 593-(J7fi-n —_- - c, a)» a? CF I @5022?!) + W) :- C}: QOOSiH(0.N) “7 I .éh—x “‘2; E Q.3 The following earthwork areas were calculated. The shrinkage ratio for this type of material was determined to be 11%. Do we need to import or export material in this project?. How many cubic meter do we need?. W van“ (m M M? _ W my 20+6O _ 110.6 372? G27 6 '7 l 2373 239525 ’2?‘ 5’ 22+3 5 I 5, I 56 7. 5 3 w» Q.4 A vertical curve joins a —2.0% grade to a +10% grade. The P.I. of the vertical V curve is at station 100+00 and elevation 69.50 m above sea level. The centerline of the roadway must clear a drainage pipe located at station 100+60 by 1.25 m. The elevation of the top of the pipe is 70.20 m above sea level. What is the maximum length of vertical curve that can be used? all: 7°10 9 ‘ 3°; PE: 54-“ IOO+00 (lea/4”" e 5+“ loo‘wo a ' "a ' ’a/ an GLSo H MC Lisa 92 : 4' O : -2- : 04- €O S‘ik (how-x.) hnw‘i' eKQ‘w’t‘i‘un :— (éa‘;5> 4- <~2><O‘é> : éQ‘E'W 9. MA Youl ehvrlu’cn : (—70.20) ._,. (L257 : 7/.‘(§~\ (‘3 Vii/L to) : 7/‘Lf5~ €8.30 :' 3.15m V A:‘/*Z:3..O ...
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  • Spring '04
  • staff
  • Following, Christopher Nolan, sea level, Above mean sea level, following earthwork, following earthwork section

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