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Recent content by dan00

  1. dan00

    sliding resistance - adhesion

    Thank you HotRod10.
  2. dan00

    sliding resistance - adhesion

    I got this question from a structural engineer regarding a structure supported on shallow foundation bearing on clayey soil. Can additional sliding resistance be obtained from adhesion at the contact between clay and vertical faces of the shallow foundation? As far as I know, it is common...
  3. dan00

    pile group effects reduction factors in bedrock

    Okiryu, upper soil improvement is an option, but there are situations where using deep foundation is the best option (e.g. uncertified fill/soft soil present in the upper 10 feet, new construction adjacent to existing structures which are on shallow foundations, underground utilities that cannot...
  4. dan00

    pile group effects reduction factors in bedrock

    Okiryu, when you say the soils affected by lateral loading on piles are the soils that are within 8D or 9D, you refer to horizontal distance, right? How about this scenario: Pile foundation needed for foundation setback from slope face and because of the presence of 5'-10' of uncertified fill at...
  5. dan00

    pile group effects reduction factors in bedrock

    Okiryu, you're right, there is some soil present, not just bedrock. Are you suggesting to use the reduction factors only for the portion of the pile embedded in soil and no reduction for the portion of pile embedded in bedrock? L-pile actually allows to change the p-modifier with depth. Thank...
  6. dan00

    pile group effects reduction factors in bedrock

    Thank you SlideRuleEra for your response. The link you provided was useful for group effects on axial capacity. How about the lateral behavior? CBC requires to consider group effects on lateral behavior when spacing is less than 8 pile diameters. Shall these reduction factors be any different...
  7. dan00

    pile group effects reduction factors in bedrock

    Currently the CBC requires reduction factors to account for group effects - on lateral behavior when pile spacing is less than 8D (D-pile diameter) - on axial behavior when pile spacing is less than 3D (1810.2.5). Local and federal agencies came up with different reduction factors. Have you...
  8. dan00

    R-Value test result

    Is it possible to get the R-Value at 300 psi exudation pressure to be 0? In other words, can the vertical pressure applied to the specimen (when placed in stabilometer)be equal to the horizontal pressure? Thanks.
  9. dan00

    abaqus - ploting output

    I model a point load on a semi-infinite soil mass. How do I plot stress v. depth?
  10. dan00

    moisture correction for marine sediments

    We determined the moisture content of frozen marine sediment samples, but the results seem to be higher than some previous testing (average about 20% higher). Is any correction that needs to be applied for salts? Or is there a standard procedure for moisture content of marine sediments? Samples...
  11. dan00

    asphalt content by ignition method

    Hi, we need to determine the asphalt content by ignition method. We got a sample mixed by the plant per design and also we got an aggregate sample+binder separately. To determine ACF (aggregate correction factor), we have to determine the mass loss of aggregate during burning process, which...
  12. dan00

    Triaxial test - sample saturation

    I'm running a CU test and I'm not sure I fully understand the process of driving the air into solution. The way I understood it is: same pressure is applied at the top and bottom of the sample and the air driven in the solution is not drained out of the sample. A colleague is telling me that we...
  13. dan00

    Chemical grout to seal leaking cracks in retaining wall

    Any suggestions about a chemical grout to be used to seal leaking cracks in a retainig wall? Since re-waterproofing is not an option at this time, repairs (using 3M Scotch-Seal chemical grout 5600 foam)were done in the past 3 years at as needed basis. Because this chemical grout has been...
  14. dan00

    Potential corrosion of the steel rebars within retaining wall

    Is there any way to estimate the effective life span of steel reinforcement in a wet environment? Here is the problem: The rebars are grouted and located approx 3" or less from the face of the wall. Where the seepage through retaining wall is occurring, the seepage is through hairline...
  15. dan00

    Potential corrosion of the steel rebars within retaining wall

    Is it any way to estimate the effective life span of steel reinforcement in a wet environment? Here is the problem: The rebars are grouted and located approx 3" or less from the face of the wall. Where the seepage through retaining wall is occurring, the seepage is through hairline...
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