Verification of the effectiveness of the groundwater level lowering method in the Omagari Namiki district of Kitahiroshima City, which was damaged by the 2018 Hokkaido Eastern Iburi Earthquake
التفاصيل البيبلوغرافية
العنوان:
Verification of the effectiveness of the groundwater level lowering method in the Omagari Namiki district of Kitahiroshima City, which was damaged by the 2018 Hokkaido Eastern Iburi Earthquake
المصدر:
国士舘大学理工学部紀要 = TRANSACTIONS OF THE KOKUSHIKAN UNIVERSITY SCHOOL OF SCIENCE AND ENGINEERING. 16:25-37
During the 2018 Hokkaido Eastern Iburi Earthquake, a sliding collapse of residential land occurred in the Omagari Namiki district of Kitahiroshima City. In this area, the groundwater level lowering method was adopted as a countermeasure against sliding collapse. Since the distribution of the humus soil layer was confirmed in the previous year’s survey, consolidation settlement due to the lowering of the groundwater level was assumed, so the groundwater level was lowered in stages to prevent uneven settlement. Regarding the effect of countermeasures against sliding collapse due to lowering of the groundwater level, we examined whether the target safety factor is secured by ground failure analysis using the maximum water level of the groundwater level after countermeasures. As a result of the analysis, it was confirmed that the target safety factor was ensured in all cross sections to be examined, and it was determined that the countermeasures were effective.