Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2002.06a
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- Pages.103-117
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- 2002
A Case Study for Construction Method of drilled Shafts installed in Very Soft Soil
초연약지반에 시공된 현장타설말뚝의 시공방안 사례연구
Abstract
During the installation of drilled shafts in very soft ground, to keep the pile shape and to central concrete quality, casing method (wrinkled pipe and embedded steel pipe) and non-casing method have been used. In the construction cost, non-casing method was the most economical. When the wrinkled pipe and the embedded steel pipe casing method are used, an increase of 133% and 123% in the construction cost could be seen. When concrete for drilled shaft was placed under groundwater, underwater unseparation concrete would be used to restrain the concretes's material separation and to control the concrete quality. On the condition of required unseparable and (lowing property was assured, use of less amount of mixed material and flowing material must be recommended.
Keywords
- drilled shafts;
- very soft ground;
- non-casing method;
- casing method;
- wrinkled pipe;
- embedded steel pipe;
- underwater construction;
- underwater unseperation concrete;
- mixed material