土工基础

›› 2016, Vol. 30 ›› Issue (6): 627-630.

• 工程实录 • 上一篇    下一篇

覆水真空预压法加固海相淤泥质软土

刘宝臣1，郑 元1，谢艳华2，张炳晖1，陈 亚1   

  1. （1.桂林理工大学 土木与建筑工程学院, 广西桂林 541004； 2.广西城市建设学校,广西桂林 541003)
  • 收稿日期:2015-12-24 修回日期:2016-01-10 出版日期:2016-12-20 发布日期:2016-12-22
  • 基金资助:

    广西科学与技术开发计划项目（桂科攻1355008-9） 

Application of Water Surcharge in Vacuum Preloading For the Marine Soft Mucky Soil Improvement

LIU Baochen1, ZHENG Yuan1, XIE Yanhua2, ZHANG Binghui1, CHEN Ya1   

  1. （1.School of Civil and Architectural Engineering, Guilin University of Technology, Guilin, 541004;
    2.Guangxi Urban Construction School, Guilin, 541003)
  • Received:2015-12-24 Revised:2016-01-10 Online:2016-12-20 Published:2016-12-22
  • Supported by:

    刘宝臣（1968-），男，教授，博士，研究方向为土木工程测试、教学及科学研究。

摘要： 通过具体实例介绍了覆水真空预压法处理海相淤泥质软土地基的施工流程、具体施工工艺和参数。通过对施工期间表层沉降监测数据的分析，表明沉降速率逐渐减小，主固结沉降速率逐渐趋于收敛；结合对施工前后的物理力学指标、静力触探和标准贯入试验的检测数据的对比，表明在覆水真空预压阶段，土体物理力学性质指标得到改善，淤泥得到了很好的排水固结，加固效果明显；最后通过现场载荷板试验，进一步证明了覆水真空预压法处理海相淤泥质软土加固效果显著。

关键词: 覆水真空预压, 沉降, 淤泥质软土, 地基加固

Abstract: This article introduced construction techniques, construction process and specific parameters of marine soft mucky soil improvements by water surcharge and vacuum preloading method. The observed settlement data from the ground surface during the construction indicate that the settlement rate reduces with time and the primary consolidation settlement rate tends to converge. The paper also compares the results of laboratory tested physical index properties, cone penetration and standard penetration test before and after the surcharge. The results indicate that the soil properties improved by the surcharge operation. Further, the plate loading tests performed on the surcharged soil verifies effect of the soil improvement.

Key words: Water Surcharge with Vacuum Preloading, Observed Settlement, Soft Mucky Soils, Soil Improvements