Experimental study on dynamic response of hammer in underwater tube dynamic compaction stone column

WANG Xin; REN Yuxiao; GUO Wei; XU Hao; KANG Yifei

doi:10.11779/CJGE2023S20042

Volume 45 Issue S2

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Chinese Journal of Geotechnical Engineering > 2023 > 45(S2): 31-36. > DOI: 10.11779/CJGE2023S20042

WANG Xin, REN Yuxiao, GUO Wei, XU Hao, KANG Yifei. Experimental study on dynamic response of hammer in underwater tube dynamic compaction stone column[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 31-36. DOI: 10.11779/CJGE2023S20042

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Experimental study on dynamic response of hammer in underwater tube dynamic compaction stone column

WANG Xin^1,,
REN Yuxiao^{1, 2},
GUO Wei^{1, 2, ,},
XU Hao¹,
KANG Yifei¹

1.
School of Civil Engineering, Tianjin University, Tianjin 300072, China
2.
Key Laboratory of Coast Civil Structure Safety of the Ministry of Education, Tianjin University, Tianjin 300350, China

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Received Date: November 29, 2023
Available Online: April 19, 2024

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Abstract

Abstract

A series of model tests on underwater tube dynamic compaction gravel pile are conducted. The effects of hammer shape, tamping energy, single filling amount and soil strength on the installation and performance of the stone column are studied. The changes in the peak acceleration, compaction settlement and column density during compaction are analyzed. The experimental results show that the peak acceleration during compaction with the new conical hammer is close to that of the traditional flat-bottom hammer, but the time history decreases, which shows a development characteristic of first increasing oscillation and then rapidly decreasing. A fitting formula has been established for the normalized maximum impact force of the rammer during compaction, with respect to the parameters such as compaction coefficient, tamping energy soil strength and single filling amount, which can be used to predict the maximum impact force of underwater tube dynamic compaction stone column on different foundation strengths.
- underwater foundation improvement,
- dynamic compaction,
- stone column,
- hammer,
- acceleration

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References

[1]	韩冉冉, 徐满意, 乔小利, 等. 水下超软土地基振冲碎石桩试验及参数控制[J]. 岩土工程学报, 2013, 35(增刊2): 612-616. http://cge.nhri.cn/cn/article/id/15455 HAN Ranran, XU Manyi, QIAO Xiaoli, et al. Vibro- replacement stone column tests and parameter controls of underwater super soft soil foundation[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(S2): 612-616. (in Chinese) http://cge.nhri.cn/cn/article/id/15455
[2]	林鸣, 梁桁, 刘晓东, 等. 海上挤密砂桩工法及其在港珠澳大桥岛隧工程的应用[J]. 中国港湾建设, 2012, 32(4): 72-77. https://www.cnki.com.cn/Article/CJFDTOTAL-GKGC201204022.htm LIN Ming, LIANG Heng, LIU Xiaodong, et al. Method for construction of offshore sand compaction piles and its application for island and tunnel project for Hongkong-Zhuhai-Macao bridge[J]. China Harbour Engineering, 2012, 32(4): 72-77. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GKGC201204022.htm
[3]	VAN IMPE W F, FLORES R D V. Deep mixing in underwater conditions: a laboratory and field investigation[J]. Proceedings of the Institution of Civil Engineers: Ground Improvement, 2006, 10(1): 15-22. doi: 10.1680/grim.2006.10.1.15
[4]	孔洋, 阮怀宁, 黄雪峰. DDC法复合黄土地基的原位浸水试验研究[J]. 土木工程学报, 2017, 50(11): 125-132. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201711013.htm KONG Yang, RUAN Huaining, HUANG Xuefeng. In-situ soaking test on composite loess foundation with down-hole dynamic compaction (DDC) [J]. China Civil Engineering Journal, 2017, 50(11): 125-132. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201711013.htm
[5]	FENG S J, SHI Z M, SHEN Y, et al. Elimination of loess collapsibility with application to construction and demolition waste during dynamic compaction[J]. Environmental Earth Sciences, 2015, 73(9): 5317-5332. doi: 10.1007/s12665-014-3783-7
[6]	董炳寅, 水伟厚, 秦劭杰. 中国强夯40年之技术创新[J]. 地基处理, 2022, 4(1): 1-16. https://www.cnki.com.cn/Article/CJFDTOTAL-DJCL202201005.htm DONG Bingyin, SHUI Weihou, QIN Shaojie. Technological innovation of dynamic compaction in China for forty years[J]. Journal of Ground Improvement, 2022, 4(1): 1-16. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DJCL202201005.htm
[7]	孔洋, 阮怀宁, 黄雪峰. DDC法复合黄土地基的原位浸水试验研究[J]. 土木工程学报, 2017, 50(11): 125-132. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201711013.htm KONG Yang, RUAN Huaining, HUANG Xuefeng. In-situ soaking test on composite loess foundation with down-hole dynamic compaction(DDC) [J]. China Civil Engineering Journal, 2017, 50(11): 125-132. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201711013.htm
[8]	周小松, 朱才辉, 乔建伟, 等. 孔内强夯法处理湿陷性黄土地基的应用综述[J]. 地基处理, 2022, 4(6): 496-506. https://www.cnki.com.cn/Article/CJFDTOTAL-DJCL202206007.htm ZHOU Xiaosong, ZHU Caihui, QIAO Jianwei, et al. Case study on the application of DDC method for foundation treatment in collapsible loess site[J]. Journal of Ground Improvement, 2022, 4(6): 496-506. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DJCL202206007.htm
[9]	马军平. 孔内深层强夯法处理大厚度湿陷性黄土在某变电站工程中的应用研究[J]. 岩土工程技术, 2017, 31(6): 278-282. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGJ201706004.htm MA Junping. Deep hole dynamic compaction method dealing with big thickness of high slope collapsible loess in the application of a transformer substation project down-hole dynamic compaction research[J]. Chinese Geotechnical Engineering Technique, 2017, 31(6): 278-282. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGJ201706004.htm
[10]	冯志焱, 林在贯, 郑翔. 孔内深层强夯法处理湿陷性黄土地基的一个实例[J]. 岩土力学, 2005, 26(11): 1834-1836. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX200511031.htm FENG Zhiyan, LIN Zaiguan, ZHENG Xiang. An example of treating collapsible loess by super down hole deep compaction[J]. Rock and Soil Mechanics, 2005, 26(11): 1834-1836. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX200511031.htm
[11]	郑凌逶, 周风华. 强夯置换软土中碎石墩形成过程的试验研究[J]. 岩土力学, 2014, 35(1): 90-97. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201401013.htm ZHENG Lingwei, ZHOU Fenghua. Experimental study of forming process of replacement pier in soft soil using dynamic replacement method[J]. Rock and Soil Mechanics, 2014, 35(1): 90-97. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201401013.htm
[12]	JIA M C, CHENG J X, LIU B, et al. Model tests of the influence of ground water level on dynamic compaction[J]. Bulletin of Engineering Geology and the Environment, 2021, 80(4): 3065-3078. doi: 10.1007/s10064-021-02110-y
[13]	FENG S J, DU F L, SHI Z M, et al. Field study on the reinforcement of collapsible loess using dynamic compaction[J]. Engineering Geology, 2015, 185: 105-115. doi: 10.1016/j.enggeo.2014.12.006
[14]	WU S F, WEI Y Q, ZHANG Y Q, et al. Dynamic compaction of a thick soil-stone fill: dynamic response and strengthening mechanisms[J]. Soil Dynamics and Earthquake Engineering, 2020, 129: 105944. doi: 10.1016/j.soildyn.2019.105944