Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2009.03a
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- Pages.119-122
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- 2009
A Study On The Engineering Properties of Rammed Aggregate and Sand Mixture Piers
쇄석과 모래 혼합다짐말뚝의 공학적 특성에 관한 연구
- Chun, Byung-Sik (Dept. of Civil Engineering, Hanyang Univ.) ;
- Kim, Baek-Young (SeokJung Construction Ltd.) ;
- Do, Jong-Nam (Dept. of Civil Engineering, Hanyang Univ.) ;
- Kuk, Kil-Keun (Dept. of Civil Engineering, Hanyang Univ.)
- Published : 2009.03.27
Abstract
The gravel compaction pile method has been used as a soft foundation improvement method because bearing capacity and discharge capacity is excellent. But the discharge capacity decreased when the clogging was generated because the clay penetrate into a void of gravel compaction pile. Accordingly, the purpose of this study is to reduce the clogging generation in gravel compaction pile constructing in the soft ground and take a step to minimize a void of gravel compaction pile. And the proper mixing ratio was determined with the large scale direct shear test performed to get strength and permeability with mixing ratio of crushed stone and sand(100:0, 90:10, 85:15, 80:20, 75:25). As a result of the test, it was showed that internal friction angle was the highest at 85:15 mixing ratio of crushed stone and sand and we can make sure a tendency of internal friction angle's decrease when the mixing ratio of crushed stone and sand passed 15%.
Keywords
- Gravel compaction pile method;
- Clogging;
- Mixing ratio of crushed stone and sand;
- Internal friction angle