双向粉喷桩处理海相软土室内外强度对比分析  

Contrastive Analysis of Strength Characteristics of Column Body Improvement by Bidirectional Dry Jet Mixing in Soft Marine Clay

作　　者：谢胜华[1] 刘松玉[2] 杜广印[2] 

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243032 [2]东南大学交通学院,江苏南京210096

出　　处：《安徽工业大学学报（自然科学版）》2013年第3期308-312,共5页Journal of Anhui University of Technology（Natural Science）

基　　金：高等学校省级优秀人才基金项目(2012SQRL037);江苏省交通科技项目(08Y33)

摘　　要：针对江苏连云港地区海相软土具有的软黏土及高黏粒含量的固有特点,通过室内水泥土配合比试验和土工基本物理力学特性试验,现场采用多功能RCPTU补勘试验和成桩施工结束28 d后进行全长取芯样,标准贯入试验、无侧限抗压强度试验、电阻率测试。试验结果表明,双向粉喷桩较常规(单向)粉喷桩搅拌更加均匀,可增强下部桩体强度,提高成桩质量,具有良好的工程强度特性。In view of the properties of high clay content of the intrinsic of the marine soft soil in Lianyungang region, through indoor cement-soil mixing proportion test and geotechnical basic physical and mechanical properties test, on-site multifunctional RCPTU filling was tested and pile length 28 d after the construction of core was sampled, and standard penetration test, the unconfined compressive strength test and the resistivity testing were implemented. The results show that compared with the conventional DJM pile, the bidirectional one has more uniform, higher bearing capacity. Thereby the bidirectional DJM pile enhances the lower pile intensity and improves the quality of pile and has better engineering properties.

关 键 词：双向粉喷桩 海相软土 黏粒含量 无侧限抗压强度 均匀性 

分 类 号：TU413.1[建筑科学—岩土工程]