Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 02, 2019 - November 04, 2019
Accurate prediction of layer construction consisting of clay, silt, sand and gravel is important to improve the ground for the construction of high-rise buildings, because the process parameters in jet grouting must be controlled to make the improvement structure with high-quality. Even if the core sample is obtained to know the layer construction, it is not uniform over wide area. Therefore, when drilling the ground before inserting a rod equipped with a nozzle for cement ejection, some physical quantities were monitored and used for the prediction of layer construction. Since rapidly oscillating data was obtained in the real ground boring, statistical analysis of the obtained ground boring data was performed. To this end, cumulative probability of the electric current and that of the water pressure were found to be useful to distinguish the soil type.
