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Hello All, I am involved in the geotech investigations for foundations for Wind Turbines. These foundation are subjected to large dynamic loads. I appreciate any comment on the following: 1 - In Bowles (4th and 5th edition) I found that driven piles are not suitable for foundations subjected...

Hello All, I am using shear wave velocity profiles for seismic site classification per IBC. However, I am not sure that if we drill a 30 m borhole and use the Nch or Su method it will give the same result as shear wave velocity measurement. Any experience or comment is appreciated. Regards

Hello all, I have the following soil condition: Soft clay about 1.5 m Firm clay about 2.0 m Clay with Su = 40 kPa about 14 m Bedrock I do not have any information about the shear wave velocities in the layers. For seismic site classification how should I take into account the effect of...

Hi, I am designing a buried pipeline in an area with rockfall hazard. How this type of hazard affects the embedment depth and type of fill material? Do I need to consider this type of loading in the design? Is there any specification for protecting the pipeline? Regards

Is there any procedure for evaluating thermal properties of soil? In situ procedures are more preferable.

Is there any specifications for the use of swelling clays in landfill covers / liners? any reference is appreciated.

I am wondering whether using swelling clays in the construction of landfill liners and covers is an issue or not. Any reference will be appreciated.

Hello everybody, Does anybody have experience with consolidation test using constant rate of loading (CRL)? How comparable are the results to the regular testing methods. I appreciate any advise on the required equipment as well. Thanks

Hi, I want to use concrete soldier piles instead of wood laggings. The plan is to use reinforced concrete piles every 8 to 10 feet, and cast plain concrete piles in between them. Thus, there will be no need to wood laggings. The structural engineer do not agree with the plan based on his...

Hi, I am using numerical modeling to estimate ground surface settlements due to tunnel works. I did the modeling in two stages. First, I used Mohr-Columb models to estimate the extents of the medium that is affected by tunnel works, which I assumed determines the disturbed soil region...

Hi everybody, I have a very basic question. Is there any difference between piezometric level and phreatic surface? If so what is it and how they are determined. Thanks

Hi, I am involved in the design of a gabion as a retaining wall. Based on my judgement I design it as a rigid wall, thus using K0 soil pressure. Is there any code for the design of a gabion? Furhter, is it considered flexible or rigid wall. Thanks

I am wondering when we use soil dynamics and soil-structure interaction in the industry? It is appreciated if you share your experiences.

I am working on a project that consists of constructing a cap for a waste landfill. The local material consists of clayey minerals that include smectite. Smectite is very swelling material,thus we need to mix the local material with borrowed ones to limit its smectite. I wanted to run X-Ray...

Hi everybody, I want to know that in practice where do we use numerical modeling in geotechnical engineering? I have lots of experience with F.E. and F.D. methods but it seems that these techniques are not that much in use in practical cases and projects. Any experience? Any suggestion? Thanks

I am getting involved in a project that may need some foundation constructed on landfills. I need to get more basic information regarding the problems that might be faced with, and the considerations that should be taken. Can anybody introduce some good references? Thanks

Hi, I am looking for succesful and ofcourse unsuccessful experiences with applying SASW test (Spectral Analysis of Surface Waves)in the field for assessing soil conditions and also finding buried objects and voids. Sharing any experience or info will be valuable.

I have just started to work as a geotechnical engineer. I realised that I need to boost up my report writing skills and improve it. I appreciate any comments or info that could help me to improve my skills. Is there any good reference that could assist me for a jump?