사질토지반에 진동타입되는 강널말뚝의 거동을 파악하고자 계측기를 부착한 강널말뚝을 각각 1본씩 단독시공 및 연결시공하여 현장시험을 수행하였다. 깊이측정장치를 통해 구한 깊이에 따른 관입속도결과에 따르면 연결부 마찰의 영향이 강널말뚝의 관입속도에 큰 영향을 미친다는 사실을 알 수 있었다. 연결시공시 연결부 마찰은 관입깊이에 대해 불규칙한 양상을 보여주었으며, 그 크기는 19.1kN/m이었다. 진동타입시 강널말뚝은 거의 강체로 거동함이 계측결과를 통해 확인되었다. 단독시공시의 효율계수는 0.42이었으며 연결시공시의 효율계수는 0.71이었다. 계측자료로부터 유도한 하중전이곡선의 양상은 Dierssen이 제안한 그것과 가장 유사하였다.
Instrumented steel sheet piles being driven by vibratory pile driver were installed in granular soil deposit and behaviors of the sheet piles were investigated. One of the instrumented steel sheet pile was installed without clutch and the other was installed with clutch. Sheet pile with clutch means that of installed in connection with pre-installed sheet pile. Penetration rates of sheet piles measured from depth measuring drum has shown that interlock friction had great effect on penetration speed of sheet pile. Clutch friction shows irregular distribution along the depths of penetration and its magnitude was estimated as 19.1kN/m. According to the accelerations obtained from accelerometer, it was seen that steel sheet pile behaviored nearly as a rigid body. Efficiency factor of an isolated sheet pile was 0.42 and that of the connected sheet pile was 0.71. Shapes of dynamic load transfer curves obtained from analysis of measuring devices was similar to those suggested by Dierssen.
