FRP관의 강도특성과 가압 그라우팅에 의한 현장 적용성 = Strength Characteristics of FRP pipe and Field Applicability by Pressure Grouting

국문 초록 (Abstract)

영문초록:Mountain ours terrain accounting for 70% of the nation's territory, the measures to stabilize slopes are in demand urgently as the use of cut slopes is increasing gradually in Korea. Although there are various kinds of construction methods in existence, a study was conducted while taking an interest in the construction method based on the FRP pipe and pressure grouting, in which its application fields are being expanded over the entire industrial field with its recent development. As a material that overcame disadvantages of general materials, FRP has outstanding construction ability, excellent corrosion resistance, and absolution not sensitive to changes since it is lighter than regular steel. Various methods of manufacturing are available, and the construction method based on the FRP pipe manufactured with different solidity by each method and pressure grouting is a semipermanent construction method capable of obtaining the shear reinforcement effect based on the FRP pipe and the shear strength increase in the surrounding ground at the same time by drilling using the FRP pipe instead of the bar used in the existing construction method and filling up the inside of a hole with sealing materials to inject high-strength injection material on cracks and joints while applying pressure. Test construction was performed in order to confirm adaptability through examples; thus, an extent of injection based on digging and an indicator was able to be confirmed, and the shear strength higher than the in-site ground with a high shear angle and adhesive strength based on the low resistive value and direct shear test was able to be obtained. By adhering the vibrating wire strain gauge before construction, it was able to be known that the shear strength increased due to an improvement of the surrounding ground as the stress value was measured lower than the reinforced steel bars constructed simultaneously at a construction site where the measurement was made after construction. A possibility of application at a construction site was verified, and much better studies from an economic aspect should be followed in the future with the development of new construction methods using new materials