中国海洋大学学报（自然科学版）2018，Vol.48Issue(7)：111-122,12.DOI:10.16441/j.cnki.hdxb.20170039
不同能级强夯置换处理软土地基现场试验
Field Test of Dynamic Replacement Method on Soft Soil Foundation Under Different Energy-Levels
摘要
Abstract
Based on foundation treatment practice of large-scale engineering in Qinzhou port,field test of dynamic replacement method on soft soil foundation under 8 000 and 15 000 kN · m energy-level was carried.Excess pore water pressure monitoring during replacement process,multichannel transient surface wave test and heavy dynamic penetration test before and after dynamic replacement,drilling test and static load test after dynamic replacement were finished in field test.Changing of bearing capacity and engineering characteristics of soil during replacement process was analyzed in details.Conclusions obtained were as following.Firstly,the bearing capacity of foundation and engineering characteristics of soil was improved after dynamic replacement.The bearing capacity of foundation was larger than 200 kPa with compression modulus of 8 000 and 15 000 kN · m dynamic replacement larger than 20 and 15 MPa.Secondly,dissipation time of excess pore water pressure of 8 000 and 15 000 kN · m dynamic replacement was 6 to 7 days and 7 to 8 days.The reinforcement depth of 8 000 and 15 000 kN · m energy-level replacement was about 8.0 and 9.5 m.Thirdly,safety distance of horizontal vibration for 8 000 and 15 000 kN · m energy-level replacement was about 18.0 and 25.0 m.Finally,difference existed between replacement piers and surrounding soil.Therefore,non-uniformity of foundation soil after dynamic replacement should be considered fully during building design.The experience and results in this paper could be referred in foundation treatment under similar geotechnical condition.关键词
软土地基/强夯置换/能级/现场试验Key words
soft soil foundation/dynamic replacement method/energy-level/field test分类
建筑与水利引用本文复制引用
马永峰..不同能级强夯置换处理软土地基现场试验[J].中国海洋大学学报（自然科学版）,2018,48(7):111-122,12.基金项目
中国石油工程建设公司科学研究与技术开发项目(CPECC2011KJ22)资助 Supported by Science Research and Technology Development Project of China Petroleum Engineering & Construction Corporation (CPECC2011KJ22) （CPECC2011KJ22）
