15000kN·m超高能级强夯法处理湿陷性黄土的应用研究

湿陷性黄土地区重大工程项目建设中,对地基处理深度及防渗有较高要求时,超高能级强夯在消除深厚地基湿陷性,增强地基抗渗透能力方面有着非常好的性价比。在中石油庆阳石化公司搬迁改造项目中,我国首次在湿陷性黄土地区引进了15 000 kN.m超高能级强夯。本文介绍了超高能级强夯处理中的强夯参数、施工要求,并通过夯前夯后室内试验,现场静载试验、静探试验的对比,取得了良好的效果,以期为超高能级强夯在黄土地区推广提供经验和为地基处理规范中强夯部分的修订提供参考。

Application and Study of Ultra-high Dynamic Compaction with 15 000 kN*m in Treatment of Collapsed Loess

In an important engineering construction in a collapsed loess area,there need high requirements on depth of ground and antiseepage.Since it can eliminate the collapse of foundation and improve the antiseepage of foundation,the ultra-high dynamic compaction has the advantages of these aspects.For the first time,the ultra-high dynamic compaction with 15 000 kN·m is introduced in the Removal and Reconstruction Project of China Petro Qingyang Petrochemical Company.According to comparison among the soil mechanics experiment,static sounding test and plate loading test before and after compaction,it is showed that an excellent effect is achieved.The compaction parameter and construction requirements in processing of the ultro-high dynamic compaction and the test effects are introduced here,which can supply some experiences to the promotion of the ultro-high dynamic compaction in a loess area and make some suggestions to the amendment of dynamic compaction in the code for ground treatment.