Failures of Gabion Walls

Retaining wall is an important structure of any infrastructure. Due to research and advancement in Civil Engineering use of new types of retaining walls are very much common in recent construction scenario. Gabion retaining wall is one of the new types of retaining wall. Gabion wall consists of stone filled metallic mesh boxes which are tied together to form a shape of retaining wall. Gabion wall is very much common nowadays due to its simplicity, speedy construction, and flexibility. In spite of massive structure of Gabion wall there are possibilities of Gabion wall failures. Literature review shows that very less information is reported on failures of Gabion wall. This paper focused on defects/ failures observed in existing Gabion walls. Total 11 sites of existing Gabion walls around Pune district (India) are considered for the study. Investigations of these sites are made to identify various defects/failures with possible reasons. Remedial measures to overcome these deflect/failures are also suggested. Such a study will be helpful not only to avoid failures but also to provide a basis for possible research and modifications in the Gabion wall

Stability Analysis of Gabion wall with Tieback in Seismic Regions

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.

Deformation Measurements of Gabion Walls Using Image Based Modeling

The image based modeling finds use in applications where it is necessary to reconstruct the 3D surface of the observed object with a high level of detail. Previous experiments show relatively high variability of the results depending on the camera type used, the processing software, or the process evaluation. The authors tested the method of SFM (Structure from Motion) to determine the stability of gabion walls. The results of photogrammetric measurements were compared to precise geodetic point measurements.