Soil Bearing Pressure

[marcploks]

Hi guys!

is there a good source out there regarding calculation of soil bearing pressure (Bi-axial)?
Im looking for a source that would be applicable for all regular foundation shapes, e.g. square, octagon, cirlce, n-sides, etc.

Thanks!+

 

[Ron]

Any good geotechnical text will show you this....Das, Bowles, Sowers, Terzhagi and Peck, etc.

 

[oldestguy]

Not sure why anyone is concerned about minor dimension variables, since there is so much variation in behavior in soils to start with; meaning degree of precision in this work generally is pretty low. I find making a calculation for bearing, settlement, etc. is reasonable if you use the same area in your example as the area within the fancy footing dimensions.

 

[darthsoilsguy2]

about 6 yeas ago there was some post about fancy shapes that brought a lot of members in. the consensus was what oldestguy said

 

[eikzkam]

i want to ask how to use the USDA classification system? how to get the percentage by looking at it with the sieve analysis, i will attach it for clarification.
STATION 1-M

Wt., Original Sample: 2000 g. Moisture Content: 14.26 %
Wt., Oven Dry Sample: 1750.41 g. Wt., Wash Oven Dry Sample passing No. 200: 1356.9 g.
CUMULATIVE
SIEVE NO. Wt. Retained (g)% RetainedWt. Pass (g)% Passing % Retained
US
1 1/2 in. 0 0 2579.98 100 0
1 in. 130.6 5.062054745 2449.38 94.93794526 5.062054745
1/2 in. 411.3 15.94198405 2038.08 78.99596121 21.00403879
3/8 in. 220.5 8.54657788 1817.58 70.44938333 29.55061667
1/4 in. 166.8 6.465166397 1650.78 63.98421693 36.01578307
no. 8 247 9.573717626 1403.78 54.41049931 45.58950069
no.10 102.3 3.965147017 1301.48 50.44535229 49.55464771
no.16 107 4.147318971 1194.48 46.29803332 53.70196668
no.30 167.3 6.484546392 1027.18 39.81348693 60.18651307
no.40 139.35 5.401204661 887.83 34.41228227 65.58771773
no.50 101.3 3.926387026 786.53 30.48589524 69.51410476
no.100 273.7 10.60860937 512.83 19.87728587 80.12271413
no.200 96.72 3.74886627 416.11 16.1284196 83.8715804
wash passing no. 200 393.51 15.25244382 22.6 0.875975783 99.12402422
pan 22.6 0.875975783 0 0 0
Total 2579.98 100