I am wondering if there are any correlations for DCP penetration index (mm/blow) to Undrained shear strength and friction angle in Granular soils. I checked ASTM D6951 and it only offers correlation with CBR value but cannot find anything relating to undrained shear strength for clays or...
I am trying to evaluate the stress on a buried utility pipe (water) 6' below ground surface due to a crane walking over it. Can anyone suggest how to do the analysis?
Guys:
Can you please recommend me a procedure or design manual for steel pile design (for solar farm foundations comprising of C-Section profiles)with applied lateral, axial loads and moment considering the soil properties, pile geometry and active/passive earth pressures.
Whats is the...
Guys:
Can you please shed some light on to estimation of pile capacity (steel C3X6 or W6X9 sections) driven into soil. These are meant for fixed and single-axis trackers for solar panels, driven around 10-20' deep.
We have bore log information (only the SPT blow counts and visual soil...
Is there a way to estimate the preliminary bearing capacity from SPT blow count. I am looking at a soil profile where the bearing soil is Silty Sand with blow count 7. Below the silty sand layer there is an stiff sandstone/IGM material with blow counts in excessive of 50.
Are there any charts...
Guys:
We are working on a project in Pan Handle Texas. I am wondering if there is a generalized active zone map (zone of moisture changes) for Texas. I am concerned about moisture changes in the Fat/Lean clay soils in the area that could lead to potential swell in the foundation backfill or...
For Calculating the resilient modulus of soils AASHTO recommends using Mr=1500*CBR for soils with CBR<10
Is there any correlation for soils that have higher CBR values for estimating the resilient modulus (Mr).
Thanks
NT
Guys:
Can anybody suggest an empirical method or rule of thumb for measuring the pullout capacity of the Channel or I sections driven into soil based on the SPT bore log information?
We generally perform pullout tests to estimate this but trying to get an estimation prior to pull out tests in...
Guys
Can you please suggest a geophysical method for evaluation of slope stability (doing a geophysical array to get the soil properties along the slope). In my understanding seismic refraction and MASW are the most famous techniques that are used for geophysical exploration related to...
Guys
I am checking a design for T-line pole foundation. The contractor is using Caisson pier foundation software for the design. The foundation is nothing but the pole embedded into the soil and back filled with cement gravel. We do not have the software to check the design.
Can you please...
Guys
Are there any tolerances for the inclinometer casing installation with respect to verticality? I mean is there any limit on the straightness of the casing that we reject using the inclinometer. Is there any calibration using the inclinometer probe?
Please let me know
Thanks
NT
Guys
I am checking the design for substation foundation. The designer came up with minimum reinforcement as 1.56 in2 (top/bottom). He is using # 8 bar top and bottom. f we sum the areas then it meets the requirement, if not it is half of the required. (#8 bar area 0.79in2 where as required is...
Guys
I am designing a low volume road for haul roads in a wind project. For the design, is there any established correlation that can be used for estimating the CBR value from aggregate base material gradation?
What is the governing CBR for the low volume(haul road design), is it the CBR of...
Hello
I am working on aggregate road base material for access roads in a project. These roads are meant for a wind project component delivery. The contractor is using KDOT AB-3 material for the aggregate base.
Compaction tests conducted on this material showed OMC 13.5% and MDD 113pcf. We...
Guys
Good Morning. We are working on access roads for a wind project in Oklahoma. The contractor is using a different material than the one specified in spec. Following a rain event, the road surface looks muddy and slush. Is there a quickest way to check road base material like pocket...
Guys
Can you please suggest me a good software (possibly a free one) for consolidation settlement estimate. Evaluation versions are also fine as I am going to use the software one time for a report.
Thanks for your input
NT
Guys:
We came across this word "TRT Undisturbed Samples" in one of our proposals for geotechnical investigation. I am not sure what this means.
Any insight ?
Thanks
NT
Guys:
I have a question regarding the consolidation settlement calculations. We can estimate consolidation settlement given the soil properties and pre-consolidation pressure from the laboratory consolidation test. I am trying to calculate the time taken for 90% consolidation to understand how...
Guys
Is there any specification for spacing of the bore holes based on the project type (length and area) for the geotechnical investigation.
I am looking for geotechnical investigation for access roads in a solar plant
Thanks
NT
Guys:
Can you please educate me on the Hydrology reports. We received a hydrology report for a wind project. HydroCAD was used to model a 25 year flood event. Culvert calculations were provided in the report.
If I want to check the report can you tell me what to look for specifically/ in...
