I am going to design a 2 story building on debris flow/landslide debris materials. Some excavation in the debris showed that soil profiles are not well developed in this area indicating a relatively young age of deposition but it was uniform in clour and particle size distribution and (some...
Would somebody be kind to let me know a software for settlement calculation other than Unisettle. Unisettle is definitely a good software but I found it difficult to understand and am more in favor of SLOPE/w type software. Thanks.
During an excavation for foundations, lock blocks were placed to support the neighboring excavated profile. The total height of lock blocks is about 3.5 m. (5 rows). The blocks were positioned on top of each other with no reinforcement by a contractor. The gap between the lock block and the...
According to VAVFAC Ultimate Bearing Capacity is yDNq + 0.4YBNy. For allowable bearing capacity the ultimate number is divided by 3. Hence as the width of foundation (B) increases the allowable bearing pressure increases.
However according to the Terzaghi and Peck charts, for a given SPT, as...
For a 1 m high berm with 1.5H:1 to 2H:1 slopes for flood protection from a ditch with 200-year peak flow of 33 m3/sec. The upstream is going to be protected by riprap. What are the typical dimensions and thickness of such a riprap. Thank you for the feedback in advance.
We want to make a 1 m high berm near a ditch to prevent the potential floods entering our camp side. They have suggested a berm that has 1 m width at crown and 4 m width at the base.
I guess one of the tasks is to check the slope stability (which is unlikely to fail. What other design...
A very heavy crane is going to work in a site with the subgrade bearing capacity of 100 kPa. Granular fiil materials have been designed to transfer the crane load to the subgrade. We ideally want to spread the load as much as possible. Is there any relation ship between the gran size...
Closed end Steel pipe piles were driven in soft silt/clay (14 m and followed by medium dense sand to 17 m. The 5000 Ibs hammer with a fall of 3ft was used. The blow counts changed from 5/ft to 20/ft for the last 2-3 ft of penetration. What is the best estimate of pile tension loads and...
I would appreciate advice on monitoring options that a geotechnical engineer should take for a building located about 9 ft from the piles during driving about 60 ft steel pile pies in very soft silty clayey materials.
Das has given (q/25).((3.28B+1)/(3.28B))**2 for allowable bearing capacity on sands using q (CPT result) after Mayerholf.
Tomlinson gives 2.1q.((B+1)/(B))**2 for the same after Mayerholf.
One may ask why these two formula are diferrent although both are with kPa unit?
What would be a reliable...
For transient wind and seismic loads in spread footings,the maximum allowable bearing pressure may be increased by one-third (1/3) at the toe for a triangular pressure distribution against the underside of the footing.
How the above principal is applied to skin friction piles, i.e. could one...
Assuming phi = o and saturated clay soil.
If a square foundation is at a depth of D, do we need to put bouyancy unit weight of soil to calculate(gama.D.Nq component?
q = 5.5 C Nc + (gama).D.Nq
It would be appreciated if you could help me to obtain the clay/silt properties from a series of DCPT results.
The objective is to calculate the pile skin friction or bearing capacity of soil. The DCPT values varied from 2 to 9 for the first 37' and from 14 to 25 between 37' to 45'. The DCPT on...
My search has not yielded any results and thought some of readers could help.
Anchor timber piles are suppporting a tower guy line. They show inclinations in the order of 10 to 20 degrees, presumebly due to the applied loads since the installation of the piles about 25 years ago.
How much...
Double timber piles are used to support the guy wires of about 30m towers about 25 years ago.
The ground (riverbed) is about 2m of clayey silt underlain by clean sand materials to a depth of 30m. The depth of anchorpiles are not known. Field inspection shows that the anchor piles are inclined...
Old Timber piles in tension in the marine environment shaw type of detiorations on their projected piece. Would appreciate feedback on inspection options to evaluate the timber material longetivity.
For till like materials (23% sub-rounded gravel, 43% sand of mainly fine grained and 33% fines) with SPT of about 50, how could one estimate the typical unit weight values.
I am considering a monopole tower foundation design. The height is about 25 m. I would appreciate a couple of design references/manuals/texts that I can use for design. I am familiar with NAVFAC and wonder if NAVFAC has any chapter on tower foundation design. Thanks
There are two charts for BC estimation from the above authors. They seem different. What are the difdderences and which one should be used.
Here are the charts
1...
