부산대학교 도서관

In this research, influential area of the high pressure injection method was evaluated by laboratory test and numerical analysis according to various conditions. To simulate the high pressure injection in the ground, testing device was developed. Test results showed that the increase of injection time and injection pressure increased the extent of injection area, but the increase of overburden pressure decreased the injection area. In addition, the effect of injection time and pressure is greater in weathered soil even though the influential area of sand was greater than weathered soil. High negative stresses were observed at the end of crack by numerical analysis. And it could be inferred that the crack would propagate because the soil can not resist the tensile stress.