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http://dx.doi.org/10.7843/kgs.2021.37.7.13

A Study on the Analysis of Monitoring Settlement Considering the History of the Groundwater Level in the Dredged Landfill Area Affected by Algae  

Jang, Ji-Gun (Kwanglim Engrg.)
Son, Su-Won (Seismic Simulation Test Center, Pusan National Univ.)
Hong, Seok-Woo (Dept. of Civil Engrg., Dong-Eui Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.37, no.7, 2021 , pp. 13-23 More about this Journal
Abstract
If roads, bridges, buildings, etc. are built on the ground with soft clay or organic soil, there may be a lot of problems in geotechnical engineering such as settlement and stability due to the large settlement and lack of bearing capacity. In extreme cases, it may appear due to shear failure or collapse of the constructed structure, so a ground improvement method is indispensable to increase the strength of the ground and to suppress settlement. In this study, the settlement according to each groundwater level condition was analyzed using the measurement results for the groundwater level conditions, one of the important factors in predicting the settlement in dredged and reclaimed ground, and the groundwater level conditions applied to the settlement analysis were proposed by comparing it with settlement generated 5 years after construction. As a result of the analysis, it is judged that it is reasonable to apply the measured groundwater level during construction and the low water ordinary neap tide (L.W.O.N.T) during load application for the groundwater level in the settlement analysis. In addition, in the case of the dredged and reclaimed ground, it is estimated that the water pressure acting on the clay layer is nonlinear, as the result of the observations of the head of water at the observation points above and below the in-situ clay layer were different.
Keywords
Dredged landfill; Monitoring settlement; Residual water level; Settlement estimation method; Target settlement; Underground water condition;
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