Properties of geogrid-reinforced marine slope due to the groundwater level changes

Evaluation of slope stability, especially in the absence of a proper bed such as marine soils, is one of the most important issues in geotechnical engineering. Using geogrid layers to enhance the strength and stability of embankments is regarded as a commendable stabilization method. On the other ha...

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Bibliographic Details
Published in:Marine georesources & geotechnology 2018-08, Vol.36 (6), p.735-748
Main Authors: Vali, Ramin, Saberian, Mohammad, Li, Jie, Shams, Gholamreza, Gelder, Pieter van
Format: Article
Language:English
Subjects:
Aquatic soils
Coastal zone
Displacement
Embankment stability
Embankments
Evaluation
geogrid
Geogrids
Geotechnical engineering
Groundwater
groundwater level
Groundwater levels
In situ tests
Marine engineering
marine soil
Plaxis 2D
reinforced embankment
Safety
safety factor
Safety factors
Slope stability
Soil
Soil properties
Soil stability
Stability analysis
Tensile strength
Water table
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Summary:Evaluation of slope stability, especially in the absence of a proper bed such as marine soils, is one of the most important issues in geotechnical engineering. Using geogrid layers to enhance the strength and stability of embankments is regarded as a commendable stabilization method. On the other hand, groundwater level erratically fluctuates in coastal areas. Therefore, the aim of this research is to study the effects of groundwater level changes on stability of a geogrid-reinforced slope on loose marine soils in Qeshm Island, Iran. At first, geotechnical properties of the site were obtained by comprehensive series of geotechnical laboratory and in situ tests. Then, by simultaneous changes of groundwater level and several parameters such as embankment slope, loading, geogrid length, geogrid number, and tensile strength of geogrid, different characteristics such as embankment safety factor (SF), vertical and horizontal displacements at embankment top and embankment base were studied. It was observed that groundwater level had significant effects on behavior of the embankment. For most of the observations, by decreasing the groundwater level, the displacements decreased and consequently safety factor increased. Increasing the length, number, and tensile strength of geogrid led to the reduction of displacements and an increase in the safety factor.
ISSN:1064-119X
1521-0618
DOI:10.1080/1064119X.2017.1386741