Tamura Takuya
A study on the effect of hitting set piles on the subsidence of the foundation of a structure surrounding ground by the earthquake
Ohtsuka SatoruĦĦIsobe Koichi
The movable weir in the Niigata Prefecture has been removed. Cavity is found in the foundation under the weir in drilling survey at that time. We considered cavity was caused by erosion due to ground water or land subsidence due to liquefaction. I was focused on land subsidence due to liquefaction in this research. In addition, I have also examined the effect of hitting set pile. I was using a numerical analysis and model experiments to research methods. In the model experiment, I found that this can cause a cavity in the subsidence of the foundation surrounding ground by an earthquake. In addition, it was found to suppress the generation of excess pore water pressure generated by the pile between Pile driving. This is due to the rigidity of the pile between the soil is not easily reduced by piles. Better if you have installed the weir is greater Da set effect of pile. From this, I found that the weight acting on the pile is affected. In numerical analysis, it was confirmed how much can reproduce the results obtained in model experiments. It was confirmed that it is possible to accurately reproduce roughly the results of model tests in numerical analysis. It was found that the increasing process of excess pore water pressure can be expressed with high accuracy, but it was found difficult to be accurately reproduced the experimental results for the resolution process.It was also examined if there is a change in the pile more rigid in the numerical analysis. It was also found to inhibit the generation of excess pore water pressure by Pile driving in the same manner as the experimental model in numerical analysis. I found that the settlement amount is suppressed by it.
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