The National Research Institute for Earth Science and Disaster Prevention, Kochi University, Saga University, etc. will conduct a public experiment using a full-scale model in order to understand the stability of retaining wall structures using gabions during disasters.The purpose is to elucidate the deformation mechanism of the retaining wall using a gabion and further improve the earthquake resistance.
防災科学技術研究所によると、実験は6月22日、茨城県つくば市天王台の防災科学技術研究所にある大型耐震実験施設で行われる。実験は長さ11.5メートル、幅3.1メートル、高さ4メートルの土槽の中に、蛇篭を用いて3段2列に積んだ高さ3メートルの擁壁を配置、震度5に相当する200ガルの揺れを起こして影響を見る。
The gabion is constructed by stacking stone-filled structures in a reinforcing bar cage.Since the materials are easy to obtain and construct, they are used in various fields such as retaining walls of roads overseas.However, there are few research cases, and it has been required to elucidate the deformation mechanism.
In the Gorkha earthquake in Nepal that occurred in 2015, gabions were used in more than half of the damaged highways, but the form of damage differs depending on the construction situation, the aging condition of the reinforcing bars, and the shape of the stones to be filled. Was there.
By proposing a construction method that is less susceptible to damage, damage in the event of a disaster can be minimized, and further spread and deployment can be expected in Asian countries.
The large-scale seismic test facility of the National Research Institute for Earth Science and Disaster Prevention has been in use since 1970, and can reproduce the vibration of the Great Hanshin Earthquake class.
