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I am looking to expand my knowledge on pile load testing and trying to follow an example that I have found in many bi directional load cell reports. I am trying to create the equivalent top down load test curve. I can create the rigid pile curve as this is just reading displacement at say 1mm...

Is it standard to determine secondary compression settlement in soil with say 40% fine and 60% granular. Atterberg classification shows that the fines are clay. Even a 2m thick layer of clay ( C alpha Of 0.012, e of 1 and t2 of 50 year and t1 of 1 year) will show a lot of secondary compression...

We have a large raft 160 x 80m. We have a borehole to 30m only. Medium dense Sand to 9m, clay to 13m medium dense to dense sand / gravel below. I argued that to do a settlement calculation, you need information to 2B, which is 160m. She argued that if you install construction joints, the slab...

I have spoken with the lab regarding the material plotting above the A line and they have since changed it to a Lean Clay with Sand. It was an error apparently. Sample at 8m was the topic. From the image below, there is less than 3% clay based on 2micron sieve. However i understand that ASTM is...

Thank you oldestguy and Ron, my question is related to settlement calculations primarily at this stage. I am dealing with a Silt with sand which comprises the following: 6% - Gravel 18% - Sand 76% - Silt Moisture content 32% LL - 41% PL - 27% PI - 14% On the borehole the material is logged...

General question, how do you know if a Silt will perform as a cohesive or non cohesive soil? Is it dependent on Plasticity? Non plastic silt, with PI less than 10, will perform as a cohesive soil? I feel that the topic is not well discussed in textbooks. If some one has a good reference please...

Would you guys mind telling me how you undertake the structural design of embedded walls. I am newish to all this and still trying to learn. One method i have seen, which is based on the British Standard, is to use the concrete column charts,which determines the % of longitudinal steel...

Hello, I am looking at how to design contiguous and secant piled walls. Rest assured, I wont be designing these walls anytime soon. I am just trying to learn for my own benefit, so please excuse me if my question is stupid / easy. I have a basic understanding of retaining walls, how to...

Apologies, I have been away. LRJ and SRE, thank you for your inputs and discsussion. They have been very helpful. LRJ - please excuse me, but I am struggling to get my head around the matrix of α. I understand the idea of it, but calculating a value based on a number of adjacent piles is...

SLIDERULEERA - thank you for the information. It has been very helpful. I am looking at a pile group that comprises 2no. rows of 13 piles. Pile spacing is 1.75m. The piles are to be founded at 4.75m into dense sand and gravel. From my research I have decided that I do not need to consider pile...

SRE - thanks.

Hello, I am doing some independent learning of pile groups. Finding good resources for pile groups is hard in my opinion. There only ever seems to be a page or two on pile groups in most text books. If anyone has some good references for pile groups could they please comment. Also, could...

Hi. We are looking to construct and earth noise bund beside a busy road. Would you see any issues with constructing the bund out of topsoil alone. We have thousands of cubes left over. The bund will be 4m high. If we slope the sides at 1 in 4 or 5 and lighlty compact it would it be ok. I...

Thanks you for responding. I have a reasonable grasp on calculating settlement. I was thought that the Mv settlement method is generally suitable for soft to firm clay. For very soft cohesive soils it is better to use the Cc method. Do you think the method of calculating settlement of...

Hello, i am first time poster. I have a site where I need to calculate settlement of a pad (17' x 12') on clay layer over a sand layer. Clay extends to 15' with sand to 40' plus. I am calculating settlement down to 24' which is 2B. I have used boussinesq stress distribution to calculate...