Determination of shear wave velocity and shear modulus estimation of peat soil using seismic geophysical method
This research is about dynamic characterization of peat using field seismic geophysical method. There are demands on dynamic characteristics in construction due to their importance towards the society. The dynamic behaviours of peat are shear velocity (Vs) and shear modulus (G). The scope of this re...
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| Format: | Thesis |
| Published: |
2016
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/8879/ http://eprints.uthm.edu.my/8879/1/Mohd_Jazlan.pdf |
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| Summary: | This research is about dynamic characterization of peat using field seismic geophysical
method. There are demands on dynamic characteristics in construction due to their
importance towards the society. The dynamic behaviours of peat are shear velocity
(Vs) and shear modulus (G). The scope of this research is meant for peat and soft clay
by using multi-channel analysis of surface wave (MASW) method and seismic
refraction method. The estimation of shear modulus is based on shear wave velocity
and soil bulk density using the sampler with 0.5 m depth each. Peat sampler was used
to verify the soil profiles at every location except for soft clay. The shear wave velocity
for peat is ranging from 26.02 – 95.89 m/s. Meanwhile, for soft clay, it has velocity
from 61.25 – 86.37 m/s. As for shear modulus of peats, the range is between 0.82 –
7.26 MPa while for soft clay, the range is between 7.29 MPa – 13.92 MPa. The
variations of shear wave velocity and shear modulus of peat are due to the differences
in peat soils properties in term of organic content, fibre content, void ratio and moisture
content for every research location. Furthermore, seismic attenuation in peat is also
affected the seismic wave velocity. The dynamic behaviour of peat and soft clay have
slight changes in shear wave velocity. However it has significant difference in shear
modulus due to the existence of organic content that contributes to their differences.
Shear wave velocity was obtained by applying seismic refraction method. The data
shows the increment of velocity with depth. The determination of dynamic behaviour
of peats was achieved by using seismic geophysical method have shown good findings. |
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