Question

1. The standard penetration tests were conducted at a depth of 6.5 m in the normally consolidated coarse sand deposit and the blow count was 35. A USA donut hammer was employed in the test. The G.W.Τ. is located at a depth of 4.0m. The unit weight of sand above the G.W.T. is 17.5kN/m3, and the saturated unit weight of sand below the G.W.T. is 19.0kN/m3. a) Evaluate Noo and (N)so, b) estimate the internal friction angle by using both Eq.(3.30) and Eq.(3.31), and the relative density Dr by using Eq.(3.21). A soil sample was obtained by using a standard sampler during the standard penetration test and a mechanical grain-size analysis was performed i the laboratory. The laboratory data are as follows Sieve Size Weight Retained (g) 19.0mm 9.50mm 0 No.10 No.40 No.100 No.200 Pan 158 308 608 652 224 42 8

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Answer 1

x B fineness modulus dest Prkimat Stae asticle Cummulative Steve Si3e Retained etaimed 0 L9Dm 0 g.9 İ6&.xtoo =.7.9 | 9.50m用 58 6. ND.u 308 53. 608 662- 2.2나 5 NO LO 86.3 NO.uO 3 No loD 2 NO.200 652 ゅルい3mm a00 296 looo E 1368 3 tne ness modulus Sam cumulative % uegaht felared 1 (368.313. 663 loo

Hence 156.oty Dooua (13.3-10) C0-(2-01 (139-45) 76.1-116.3) ㅈ (60-46-3 3.a 38 Do Pepresent size d Penticle to whtch lor. Rarticle