中南大学学报（自然科学版）2017，Vol.48Issue(7)：1891-1900,10.DOI:10.11817/j.issn.1672-7207.2017.07.028
陆域与海域深厚碎石回填地基高能级强夯有效加固深度对比试验研究
Comparative experimental research of effective reinforced depth of high energy dynamic compaction on foundation backfilled by crushed stone in land area and sea area
摘要
Abstract
Based on the foundation treatment of high energy dynamic compaction (HEDC) of a petroleum storage project in Guangdong,the effective depth of improvement of HEDC with 15 000 kN.m on foundation backfilled by crashed stone in the land area and the sea area were studied through plate loading test (PLT),dynamic penetration test (DPT),standard penetration test (SPT),Rayleigh wave test (RWT) and laboratory soil test.The results indicate that the effective depth of improvement is not less than 10.0 m in the land trial ramming area,and the effective depth of improvement is not less than 8.0 m in the sea trial ramming area.The dynamic consolidation improvement effect is not significant between the tamping points and the no-tamping points in the land backfill area and the sea backfill area,and therefore test design parameters are reasonable.The uniformity of the foundation is better after HEDC with 15 000 kN.m,dynamic compaction influence depth is more than 20.0 m,and meanwhile,powder sand liquefaction is eliminated in the depth range of 20.0 m,but it has less effect on the mucky silty clay with the deep-thick fill.Under this experiment condition,the correction coefficient for the effective depth of improvement from 0.21 to 0.26 is recommended according to Menard formula.关键词
高能级强夯/地基处理/碎石土/有效加固深度/原位试验/室内试验Key words
high energy dynamic compaction/foundation treatment/crashed rock soil/effective depth of improvement/in-situ test/laboratory test分类
建筑与水利引用本文复制引用
闫楠,白晓宇,水伟厚,廖天辉..陆域与海域深厚碎石回填地基高能级强夯有效加固深度对比试验研究[J].中南大学学报（自然科学版）,2017,48(7):1891-1900,10.基金项目
上海市科学技术委员会上海市科技启明星跟踪类项目(13QH1400400) （13QH1400400）
上海现代建筑设计集团研究项目(J01Be-011-1005-0029) (Project(13QH1400400) supported by the Shanghai "Post-Qi-Ming-Xing Plan" of Shanghai Science and Technology Committee of China （J01Be-011-1005-0029）
Project(J01Be-011-1005-0029) supported by Shanghai Modern Architectural Design Group of China) （J01Be-011-1005-0029）
