FIELD EVALUATION OF DYNAMIC COMPACTION ON SILT FOUNDATION

Chen Zhongqing; Xu Chao; Ye Guanbao; Lu Sheng; Li Junshi

doi:10.13204/j.gyjz201304022

Volume 43 Issue 4

Dec. 2014

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Chen Zhongqing, Xu Chao, Ye Guanbao, Lu Sheng, Li Junshi. FIELD EVALUATION OF DYNAMIC COMPACTION ON SILT FOUNDATION[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(4): 106-110. doi: 10.13204/j.gyjz201304022

Citation:

Chen Zhongqing, Xu Chao, Ye Guanbao, Lu Sheng, Li Junshi. FIELD EVALUATION OF DYNAMIC COMPACTION ON SILT FOUNDATION[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(4): 106-110. doi: 10.13204/j.gyjz201304022

Chen Zhongqing, Xu Chao, Ye Guanbao, Lu Sheng, Li Junshi. FIELD EVALUATION OF DYNAMIC COMPACTION ON SILT FOUNDATION[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(4): 106-110. doi: 10.13204/j.gyjz201304022

Citation:

Chen Zhongqing, Xu Chao, Ye Guanbao, Lu Sheng, Li Junshi. FIELD EVALUATION OF DYNAMIC COMPACTION ON SILT FOUNDATION[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(4): 106-110. doi: 10.13204/j.gyjz201304022

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FIELD EVALUATION OF DYNAMIC COMPACTION ON SILT FOUNDATION

doi: 10.13204/j.gyjz201304022

1.
1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China;
2.
2. Huai’an Airport Construction Headquarters,Huai’an 223000,China;
3.
3. Shanghai CAAC New Era Airport Design &Research Institute Co.,Ltd.,Shanghai 200335,China?

Received Date: 2012-08-25
Publish Date: 2013-04-20

Abstract

Abstract

An experimental study was made, which focused on the suitability and construction technique of eliminating silt liquefaction using dynamic compaction.During the trial program several items such as surface settlement and groundwater table and excess pore water pressure were monitored, and in-situ test such as standard penetration test(SPT) and cone penetration test(CPT) were carried out before and after compaction.The results showed that after dynamic compaction the liquefaction of silt up to 6 m was eliminated and the properties of the in-place soils were also improved.Dewatering process was needed before compaction to lower the water level of the site.The dissipation of excess pore water pressure after compaction was found quite fast, with 80 percent of excess pore water pressure dissipated after one day within different depth of the site and complete dissipation after 5 days.The results also showed that with less energy of single tamping combined with full tamping would come to better effect of improvement at this site, so the construction technique of 2 passes single tamping with 1 500 kNm and one pass of full tamping with 800 kNm was recommended.
- ground improvement,
- dynamic compaction,
- silt,
- liquefaction,
- in-situ test ?

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References(14)

References

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