|
Title |
A Study on the Determination of Construction Depth of Vertical Drain by Cone Resistance
|
|
Keywords |
Surface protector ; Water repellent ; Chloride ion penetration ; Neutralization ; 표면 보호재 ; 발수 ; 염소이온 침투 ; 중성화 |
|
Abstract |
Recently, piezocone penetration test is frequently used in order to estimate the characteristics of soft ground with standard penetration test, generally used in the past. In this study, the correlation of standard penetration test, piezocone penetration test and driving resistance of vertical drain is analyzed in order to increase the confidence for determination of soft ground depth. As the results of each zone, the relation between standard penetration test and piezocone penetration test shows qc=(1.09～1.63)N at the soft ground, determined by 5/30 N value which is decided for soft ground criteria. And qc=(1.2 1～1.98)N was shown at the point of compressible layer, evaluated by the preconsolidation pressure. And driving resistance of vertical drain is 65～70㎏f/㎠ which is equal to 10㎏f/㎠ of cone penetration resistance.
|