선단확장식 쏘일네일링의 주면마찰력과 선단쐐기력의 하중분담율 분석

Recently, the natural and man-made slope collapses occur frequently because of sudden heavy rains. So, a variety of slope stability measures have been developed and applied to failure slopes. Soil nailing method usage has been increased because of its workability and economic aspects. Soil nailing method is applied in combination with other methods. Soil nailing method is a kind of combinational structure of steel bar and cement grouting. In this study, pullout resistance tests were performed for un-grouting and grouting soil nailing. The wedge force of nailing tip was analyzed to verify the reinforcing effect of End-expanded soil nailing through the field test. From the test results, a wedge force of End-expanded soil nailing method was analyzed. And also, the load distribution of frictional force and wedge force were analysed.