- 會議論文
Development of the PDC Equipped with the Blow Energy Measurement and its Application
摘要
Conventional sounding overestimates the penetration resistance (N_d-value) compared with the SPT-N value due to the influence of the friction between the rod and the ground etc. This overestimation becomes larger when the measurement depth becomes deeper. iPDC, PDC equipped with the blow energy measurement, is a newly developed in-situ sounding device equipped with the pore water pressure and the load measurement at the cone tip. The fines content of the tested soil can be estimated based on the residual value of the excess pore water pressure u_R, and the blow efficiency can be obtained from the load response at the blow. Furthermore, the penetration resistance can be corrected using the blow efficiency. Then, iPDC can evaluate soil liquefaction accurately and fast because it can evaluate the penetration resistance considering the blow efficiency and the fines content at the same time from the in-situ measurement. In this paper, iPDC device is introduced. In addition, the liquefaction analysis based on the Japanese standard (JRA method and T-Y method) and the Taiwanese standard (HBF method) using iPDC result is introduced as an application example.