Check the file attached,it will explain.http://files.engineering.com/getfile.aspx?folder=c7afcefa-17a8-49bf-b39b-e119ffcd2992&file=Force_at_a_point_in_the_semi-infinite_solid.pdf
From my knowledge, the results will be equivalent to the results from Cassagrande's apparatus.
As the shear strength is close to zero at liquid limit from both methods.
Is it reasonable to calculate consolidation coeffcient for unloading phase in oedometer test? Is it possible to use it to estimate the unloading behaviour? Please give some advice?
You should know something about consolidation.
In the normal consolidation test,with the rise of load pressure the void ratio will decrease, thus the moisture content will decreas also.
I am a little confused about your post.
Thanks fattdad!
One of the samples is described according to BS as "Firm, grey, slightly sandy CLAY ",just check with ASTM it could be classified as lean clay. Others mostly could be classfied as clay or just sandy clay.
What I concern is that reason why half or more consolidation is finished...
Our lab contractor is doing some consolidation tests on silty clay.
Step 1 load the sample to in-situ stress to reduce some disturbance.
Step 2unload to 5kpa then reload to 3200kpa.
They encountered some problem on reporting t50 and cv.
In some cases the deformation happens very...
Please check “the "d" is half of the height H”, I don't think it is right.H/D should be less than 0.4. Also normally you should check Part 5 instead of Part 6 for the conventional oedometer test even the formula is the same to some extent.
For such problem,it is not so relevent for the geotechnical bearing capacity as it goes into the rock. With larger settlement/displacement, obviously the pile will have a larger bearing capacity. So only the settlement/displacement matters other the bearing capacity.
For the similar situation...
And do remember the preconsolidation stress the sample experienced.It could cause different behaviour for the sample. A obvious overconsolidated sample commonly will show a higher C' and lower Phi' compared to its normal consolidated peer.
Suggest do an oedometer test before carry out any...
It is very pity most of these references are only with Japanese. But one file is attached, you guys can have a look of the construction procedure. http://files.engineering.com/getfile.aspx?folder=5232f063-a3f6-4e9d-a420-105e7540b930&file=gaiyo.pdf
The word "caisson" comes from the French,which means "box".
For the caisson in the early age, it only refers to the pneumatic caisson as you mentioned. In the enclosed shaft,excavation is carried out with high air pressue to balance the water pressure below the excavation surface below and the...
Pacheco Silva’s method from south america is also convenient to use and also independent of the graph scale.
Pacheco Silva, F. 1970. A new graphical construction for determination of the pre-consolidation stress of a soil sample. In Proceedings of the 4th Brazilian Conference on Soil Mechanics...
