Study of pile integrity and dynamic analyzer system for bearing capacity measurement
Construction on peat is very challenging especially where the peat is of varying depth with low shear strength and bearing capacity. There is a need to provide a simple and reliabIe method to determine the in-situ undrained shear strength and bearing capacity. The idea of an instrumented composite p...
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| Main Authors: | , |
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| Format: | Monograph |
| Published: |
Universiti Tun Hussein Onn Malaysia
2011
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/1779/ http://eprints.uthm.edu.my/1779/1/0383x.pdf |
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| Summary: | Construction on peat is very challenging especially where the peat is of varying
depth with low shear strength and bearing capacity. There is a need to provide a
simple and reliabIe method to determine the in-situ undrained shear strength and
bearing capacity. The idea of an instrumented composite pile for foundation on peat
is derived from a novel combination of structural and geotechnical concept. The use
of lightweight and high strength material for the foundation is to resolve the
construction problem on peat. The instrumented steel composite pile is designed by
ons side ring the controlled density characteristics of the foamed concrete having a
density which matches the density of peat. Foamed concrete of density 1300 kg/m3
was cast into the profiled steel casing of strength 275~/mm'. The site test was
conducted at Parit Nipah, Batu Pahat. The design of instrumented pile is based on
the use of a fill size pile to determine frictional and bearing capacity. The
comparison with the value of undrained shear strength (Su) obtained from vane shear
field test produced results which forms the basis of performance evaluation. Field
test results indicated that the bearing capacity of peat could range between 5 to 12
times Su. Further tests on greater depth of peat under static and dynamic loading
conditions are proposed on other test sites to verify the accuracy and reliability of
this novel method. |
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