岩土工程学报2023，Vol.45Issue(z2)：31-36,6.DOI:10.11779/CJGE2023S20042
水下套管强夯碎石桩夯锤动力响应试验研究
Experimental study on dynamic response of hammer in underwater tube dynamic compaction stone column
摘要
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.关键词
水下地基处理/强夯/碎石桩/夯锤/加速度Key words
underwater foundation improvement/dynamic compaction/stone column/hammer/acceleration分类
土木建筑引用本文复制引用
王鑫,任宇晓,郭伟,徐昊,康逸飞..水下套管强夯碎石桩夯锤动力响应试验研究[J].岩土工程学报,2023,45(z2):31-36,6.基金项目
国家自然科学基金项目(52171273,52108335) （52171273,52108335）
天津市科技计划项目(20JCJQJC00220) （20JCJQJC00220）
