Question

Determine the required volume of the excavation, backfill, and disposal. Show all your calculations by sending Excel file or hand calculation via Folio email.

Question 20 options:

excavation: 56.34 cy backfill: 23.80 cy disposal: 32.54 cy

excavation: 142.07 cy backfill: 118.52 cy disposal: 23.55 cy

excavation: 356.07 cy backfill: 256.87 cy disposal: 99.20 cy

excavation: 467.89 cy backfill: 222.31 cy disposal: 245.58 cy

Height of wall = 20'0

Question 20 (6 points) 50'-0" 43 Grade Elev Grade Elev. 45 Plan 12 Wall LA Girade Elev. 44 Grade Elev. 42.7 .0.0 Section A -A . 8-0 High Wall Average Grade Elev Bottom Elev. 40 12 2-0 x 1-0 Footing each Drawing 401 side NTS

Answer 1

SO1M A E =43 E 4S Bottom ekvation = 40| CE 44 DE2. Barr width excava tion 2 212 Centen line distances : So- g= C D AB= B CAD 20- 1= 19/ Excavationx-ection area at A AA 21 t2 y Kh Simileak at B A s4)= 45 H &Ac= x4(u42) x2.7442742-) 2 32 ft & Ap= 18-9 ft Sp excava tion volume, = +AB AA 2 AB AD CD +28 2 2 AD 2. 21+4s us+ 32x19 32+18.09 V X 49 - 49 2 2 2. (g221 18.0g +2 ft 3 X 19 3a47.02 3 27 V= 146.18 2+(3-1)x1= fi "B = xI'(5-1)x1= 6 H Area X-Jection wall at A = 2 C 2x 2 (27-1)= 3.7 ft D= 2x1 + Volume Ig +S+3.7 3-7t4 35-8 ft 2 3.55 yd3 3

So, Backfill = 146.18 - 23.55 = 122.63 yd³ . Closest option is OPTION 2