논문 상세보기
Earthquake preparedness has become more important with recent increase in the number of earthquakes in Korea, but many existing structures are not prepared for earthquakes. There are various types of liquefaction prevention method that can be applied, such as compaction, replacement, dewatering, and inhibition of shear strain. However, most of the liquefaction prevention methods are applied before construction, and it is important to find optimal methods that can be applied to existing structures and that have few effects on the environment, such as noise, vibration, and changes in underground water level. The purpose of this study is to estimate the correlation between the displacement of a structure and variations of pore water pressure on the ground in accordance with the depth of the sheet file when liquidation occurs. To achieve this, a shaking table test was performed for Joo-Mun-Jin standard sand and an earth pressure, accelerometer, pore water pressure transducer, and LVDT were installed in both the non-liquefiable layer and the liquefiable layer to measure the subsidence and excess pore water pressure in accordance with the time of each embedded depth. Then the results were analyzed. A comparison of the pore water pressure in accordance with Hsp/Hsl was shown to prevent lateral water flow at 1, 0.85 and confirmed that the pore water pressure increased. In addition, the relationship between Hsp/Hsl and subsidence was expressed as a trend line to calculate the expected settlement rate formula for the embedded depth ratio.
1. 서 론
2. 시험 준비
2.1 진동대 시험 장치
2.2 지반 조성 및 계측센서 설치
2.3 입력지진파 및 실험 프로그램
3. 1-G 모형실험을 위한 상사법칙
4. 시험결과 및 분석
4.1 Hsp/Hsl
4.2 비보강 Case
4.3 Hsp/Hsl=1.0, 0.85, 0.75, 0.65일 경우
4.4 시트파일의 근입 깊이에 따른 간극수압비 비교
4.5 시트파일의 근입 깊이에 따른 강도 비교
5. 결 론
REFERENCES
