Research on the Large Size Loading Plate Test of Underwater Sand Compaction Pile Composite Foundation

Abstract:

Large size loading plate test for sand compaction pile composite foundations with the replacement ratio being up to 60% was carried out to study the deformation and bearing capacity of the sand compaction pile composite foundation. The test was carried out for 53 days with anchor pile, square loading with the side length of 5.4m, 15m-deep water and twice circulation loading mode. The compression deformation, pile-soil stress ratio and deformation modulus of the sand compaction pile composite foundation was analyzed through load test. Test results indicated that, the ultimate bearing capacity of the sand compaction pile composite foundation in this test was larger than 340kPa; sand compaction pile had a drainage consolidation effect on the soft soil between piles; under the load-keeping condition, sand compaction pile composite foundation would also has settlement; pile-soil stress ratio was 6.3 and deformation modulus was about 8kPa. The success of the test may provide experience and reference for load test of underwater sand compaction pile composite foundation carried out at open sea.

• Periodical: Applied Mechanics and Materials (Volumes 744-746)
• Pages: 574-578
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.744-746.574
• Online since: March 2015
• Authors: Jin Fang Hou*, Jian Yu, Xin Wei Xu
• Keywords: Deformation Modulus, Large Size Loading Test, Pile-Soil Stress Ratio, Sand Compaction Pile Composite Foundation

References

[1] Hong Kong-Zhuhai-Macao Bridge Main Work-Island and Tunnel Engineering Construction Drawing Design, compiled by CCCC 4th Harbour Engineering Survey and Design Institute, 2011. (in Chinese).

[2] ZHAO Minghua, YANG Minghui and WEI Jun. Discrete Material Composite Foundation Bearing Capacity Calculation Research [J]. Academic journal of Huazhong University of Science and Technology (natural science edition), 2006 (3) 34-38. (in Chinese).

[3] GONG Xiaonan. Composite Foundation Theory and Engineering Application [M. Beijing: China Architecture and Building Press, 2002. (in Chinese).

[4] CHEN Zhongyi, Zhou Jingxing and WANG Hongjin. Soil Mechanics [M]. Beijing: Tsinghua University Press, 2009. (in Chinese).