Stability Analysis of Gabion wall with Tieback in Seismic Regions
Abstract: One of the most
important issues in the construction of highways, mountain and urban roads is
known as slope stabilization. If the necessary actions for protection are not
considered, it could lead to problems and events such as landslides,
settlements and even destruction of roads. There are many methods for
stabilizing slopes such as Gabion walls and Tiebacks. This study can be used as
the beginning of a new synthetic method where the Gabion wall is combined with
Tiebacks. Gabion walls and tiebacks can be known as the most flexible methods
of slope stabilization methods, because of this reason, if they can be combined
with each other, it should show very good results in front of dynamic and even
static forces. This combination is the novel point of this research. In this
study at first, the gabion wall will be analysed in different loading
conditions, and then to deal with earthquake dynamic forces the tiebacks will
be used to increase the gabion walls stability.
The software that is used in this study is GEO5 software, nowadays this
software can be introduced as one of the best slope stability analysis
software's. The results of this study showed that the designed gabion wall
could be stable in dense silty gravel soil (GM) in 8.5-meter slope, and with
magnitude of 0.25 horizontal coefficient of Manjil earthquake, but in the same
geometry and material condition and impact of 0.4 magnitude horizontal coefficient
of Bam earthquake it couldn't be stable alone. In this condition four rows of
18 meter tiebacks could stable the gabion wall very well. In this model, under
loading condition 3 (with horizontal and vertical pseudo-static coefficient of
Bam earthquake) that had the most vertical pseudo-static coefficient, the
23-meter tieback anchors with 12-degree inclination respect to horizontal could
stable the considered gabion wall. This result could show that, the combination
of gabion walls with tieback anchors gives a satisfactory result and it is an
efficient and helpful method for stability of slopes in front of earthquake and
dynamic forces.
Author: Hamid Asadpour, Tohid
Akhlaghi
Journal Code: jptsipilgg170004
