1:45 PM - 3:15 PM
[O11-P49] Relationship between manhole shape and uplift during liquefaction
Keywords:liquefaction, manhole, disaster prevention
One of the damages that can occur during liquefaction is the surfacing of manholes. Therefore, the purpose of this study was to determine the relationship between the amount and shape of manholes that surface during liquefaction.
The objective of this study was to elucidate the relationship between the amount of manhole surfacing during liquefaction and the shape of the manholes.
Manhole models of various shapes (triangular, square, pentagonal, hexagonal, and circular columns) were constructed and the amount of buoyancy during liquefaction was evaluated.
The amount of uplift during liquefaction was evaluated.
For the models and the soil, a plastic plate model and glass beads were used in Experiment 1, and a 3D printer model was used in Experiment 2 to simulate reality.
The results of both experiments 1 and 2 showed that the five in both experiments 1 and 2, the pentagonal prism had the largest amount of buoyancy, and then the amount of buoyancy decreased as the number of vertices decreased and increased, respectively.
The amount of lift decreased as the number of vertices decreased and increased, respectively.
In the future, we will use glass beads, whose particle size distribution can be easily standardized, so that we can compare the amount of buoyancy by the difference in shape alone.
The amount of buoyancy can only be compared by the difference in shape.
The objective of this study was to elucidate the relationship between the amount of manhole surfacing during liquefaction and the shape of the manholes.
Manhole models of various shapes (triangular, square, pentagonal, hexagonal, and circular columns) were constructed and the amount of buoyancy during liquefaction was evaluated.
The amount of uplift during liquefaction was evaluated.
For the models and the soil, a plastic plate model and glass beads were used in Experiment 1, and a 3D printer model was used in Experiment 2 to simulate reality.
The results of both experiments 1 and 2 showed that the five in both experiments 1 and 2, the pentagonal prism had the largest amount of buoyancy, and then the amount of buoyancy decreased as the number of vertices decreased and increased, respectively.
The amount of lift decreased as the number of vertices decreased and increased, respectively.
In the future, we will use glass beads, whose particle size distribution can be easily standardized, so that we can compare the amount of buoyancy by the difference in shape alone.
The amount of buoyancy can only be compared by the difference in shape.