The study of soil-roots strength performance of soil slope by using guinea grass
Vegetation has been proven for establishing and implementing resistive measures against erosion and failure of slopes, river banks, removal of air pollution and reduced storm water runoff. Installation of cover crop involved soil element usage as growth medium which create several interaction betwee...
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| Main Authors: | , , , , , |
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| Format: | Conference or Workshop Item |
| Published: |
2015
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/7273/ http://eprints.uthm.edu.my/7273/1/GE08.pdf |
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| Summary: | Vegetation has been proven for establishing and implementing resistive
measures against erosion and failure of slopes, river banks, removal of air
pollution and reduced storm water runoff. Installation of cover crop involved soil
element usage as growth medium which create several interaction between both
strands. This study was carried out to investigate the soil strength performance by
using Guinea grass at different planting period up to three months. Grass was
planted in a 300 mm x 300 mm x 700 mm test plot with a suitable soil medium.
Direct shear tests were conducted for each plot to determine the soil shear
strength according to different planting period. Some basic Geotechnical testing
was also carried out. The results showed there is an increment in shear strength
for soil sample over the time at various depths. During period of 1st, 2nd and 3rd
month, the average shear stress of 100 mm depth was 50.56kPa, 63.96kPa, and
96.59kPa respectively. Meanwhile, for 200 mm depth the result was 40.843kPa,
53.91kPa and 62.93kPa respectively. Lastly, on 300 mm depth, shear stress was
37.21kPa, 51.09kPa, and 59.27kPa respectively. Based on the result, the higher
shear strength was obtained at different planting period and at varying depths.
From the observation, roots mass increased for different planting period. In terms
of tensile strength, the diameter of the root affects the rate of resistance against
the tensile forces. This indicated that the roots structure growth affects the soil
shear strength. |
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