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http://dx.doi.org/10.7843/kgs.2022.38.12.67

Instrumentation Management of the Deep Soft Ground with Dredged Clay Reclaimed in the Upper  

Jung, Na-Young (Korea Maritime and Ocean Univ.)
Kang, Seung-Chan (Kwanglim Engineering)
Kim, Tae-Hyung (Dept. of Civil Engrg., Korea Maritime and Ocean Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.38, no.12, 2022 , pp. 67-78 More about this Journal
Abstract
In this study, the measurement results of the coastal deep soft ground buried in the upper part of the dredged clay were analyzed and compared with the current specification standards. Based on the results, a suitable proposal was suggested for the selection, installation, data arrangement, and analysis of each instrument used in the deep soft ground improvement construction. The pore water pressure meter has a range of 1.5 times or more of the expected measurement range, considering the field conditions of the soft ground. The groundwater level meter installed in the horizontal drainage layer checks the change in the groundwater level during the embanking as well as the performance of the catchment well and the horizontal drainage layer. Therefore, it is important to manage so that the groundwater level exists inside the horizontal drainage layer during embanking. It is enough to install the inclinometer in the gravel layer below the soft ground or weathered rock with an N value of 40 or more for the deep soft ground. It seems desirable to install a screw type for differential settlement meter. However, the screw type should not settle due to its own weight. Considering that it is a dredged landfill where subsidence occurs significantly, it is sufficient to manage the tolerance of leveling at about 10 mm (L is the one-way distance (km)).
Keywords
Data arrangement and analysis; Deep soft ground; Dredged clay reclaimed; Instrumentation management; Measuring instruments;
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