WebA standard penetration test was performed in a 150 mm diameter boring at a depth of 9.5 m be-low the ground surface. The driller used a UK-style automatic trip hammer and a standard SPT sampler. The actual blow count, N, was 19. The soil is a normally consolidated fine sand witha unit weight of 18.0 kN/m3 and D50 = 0.4 mm. Web2. Use the blow-count value, N, from the table (a) Indicate the blow-count value, N, for each of the SPT samples obtained. (10 points) (b) Determine the depth correction factor, CN, for each of the SPT samples, assuming …
Engineering Properties of Soil and Rock - Iowa …
WebApr 19, 2024 · The enclosed spreadsheet uses a macro that is capable of estimating secant Young’s modulus at 50% of ultimate shear strength (E_{50}), friction angle (\phi), and undrained shear strength (S_{u}) of a soil layer based on typical borehole data such as SPT blow count and unit weight.This spreadsheet can be very handy when no CPT and/or … WebThe sum of the number of blows required for the second and third 150 mm of penetration is termed the standard penetration resistance or the N-value. The blow count is used to estimate the density ... iphone 7 jet black scratches fix
interpreting blow count to find friction angle
WebAug 1, 2024 · N DCP value of 10 to about 0. 6 at N DCP value of 32. This means that for this project, at low N DCP values the correlation equations predict similar N SPT values for both coarse- WebN C = 15 + 0.5 (N R -15) Where N R is the recorded value and N C is the corrected value. If N R less than or equal to 15, then N c = N R 2. Overburden Pressure Correction From several investigations, it is proven … WebNov 29, 2024 · Hi. I have a very simple and maybe dumb question, but how do you interpret blow count N-value when there is a wide range in the blow count? For example I am reading a boring report with N-values … iphone 7 lightning port repair near me