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Volume 14 article 382 pages: 290-295
The objective of this
research was to study the effect of the 3 apex angles of cone and the water levels
on the bearing capacity of sandy soil layer by using kunzelstab test. The silty
sandy soil (SM) was used as the representative of sandy soil. According to the
results, the cone angle increase, a number of blows increase and the adjusted
factors of the blows from the apex angles of 60º and 180 º to be that of the
apex angle of 90º (control) were 1.118 and 0.878, respectively. The correlation
of the blows against the internal friction angles of SM soil can be used for
calculating the soil bearing capacity under the condition that the depth was
deeper than 1 m below the ground surface. The soil bearing capacity of SM soil
below the water level decreases 70-75 percent compering to dry soil. The bearing capacity of SM soil above the water level up to 0.6 m decreases
25-30 percent compering to that of the dry soil at the same depth. Therefore,
the calculation of the soil bearing capacity in the silty sandy soil layer
should be considered the effect of the water level.
I would like to thank
Rajamangala University of Technology Rattanakosin, Thailand for providing funding
for this research. Also, we thank Mr. Buncha Oncham, Mr.Somphop Makkayai and Mr.Suttisak
Intarasanit for operating kunzelstab test.
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