TY - JOUR
T1 - Properties of geogrid-reinforced marine slope due to the groundwater level changes
AU - Vali, Ramin
AU - Saberian, Mohammad
AU - Li, Jie
AU - Shams, Reza
AU - Gelder, Pieter van
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - Displacement
KW - geogrid
KW - groundwater level
KW - marine soil
KW - Plaxis 2D
KW - reinforced embankment
KW - safety factor
UR - http://www.scopus.com/inward/record.url?scp=85032662032&partnerID=8YFLogxK
U2 - 10.1080/1064119X.2017.1386741
DO - 10.1080/1064119X.2017.1386741
M3 - Article
AN - SCOPUS:85032662032
SN - 1064-119X
SP - 1
EP - 14
JO - Marine Georesources & Geotechnology
JF - Marine Georesources & Geotechnology
ER -