| 新近吹填淤泥地基负压传递特性及分布模式研究 |
| |
| 引用本文： | 鲍树峰,莫海鸿,董志良,陈平山,邱青长.新近吹填淤泥地基负压传递特性及分布模式研究[J].岩土力学,2014,35(12):3569-3576. |
| |
| 作者姓名： | 鲍树峰 莫海鸿 董志良 陈平山 邱青长 |
| |
| 作者单位： | 1.华南理工大学 土木与交通学院，广州 510641；2.中交四航工程研究院有限公司 中交交通基础工程环保与安全重点实验室，广州 510230 |
| |
| 基金项目： | 中交交通基础工程环保与安全重点实验室科研资助项目（No. 院科Y2013D27）。 |
| |
| 摘 要： | 为深入了解无砂垫层真空预压技术加固新近吹填淤泥地基过程中的负压传递特性和分布模式,依托珠海港高栏港区某新近吹填淤泥地基处理工程开展了现场试验研究,研究结果表明:(1)土工合成材料水平排水垫层中的负压损失程度较严重,至少为16%;整个排水系统内的负压损失程度也较严重,最严重的高达57%。(2)不同深度处土体中的负压传递特性一定程度上受相应位置处淤泥自重沉积规律的影响,粗颗粒含量高的深度位置,其负压衰减程度相应较低;但总体来讲,负压从竖井向土体传递过程中的损失程度很严重,至少67%,这是新近吹填淤泥地基经无砂垫层真空预压技术加固后土体强度增长有限的主要原因。最后,明确给出了该类地基的负压分布模式:水平排水垫层中的负压可考虑为随时间变化的线性衰减模式,而竖向排水体中的负压可考虑为随时间变化的非线性衰减模式。
|
| 关 键 词： | 新近吹填淤泥地基 无砂垫层真空预压技术 负压传递特性 负压分布模式 |
| 收稿时间： | 2013-07-10 |
Research on transfer properties and distribution model of negative pressure in fresh hydraulic reclamation muck foundation |
| |
| BAO Shu-feng,MO Hai-hong,DONG Zhi-liang,CHEN Ping-shan,QIU Qing-chang.Research on transfer properties and distribution model of negative pressure in fresh hydraulic reclamation muck foundation[J].Rock and Soil Mechanics,2014,35(12):3569-3576. |
| |
| Authors: | BAO Shu-feng MO Hai-hong DONG Zhi-liang CHEN Ping-shan QIU Qing-chang |
| |
| Institution: | 1. School of Civil Engineering &Transportation, South China University of Technology, Guangzhou 510641, China; 2. Key Laboratory of Environmental Protection & Safety in Foundation Engineering of Transportation, CCCC Fourth Harbor Engineering Institute Co., Ltd., Guangzhou 510230, China |
| |
| Abstract: | To deeply know transfer properties and distribution model of negative pressure in fresh hydraulic reclamation muck foundation in the process of vacuum preloading technology with no-sand horizontal drainage cushion, based on a similar project in Gaolan Seaport Area in Zhuhai Seaport, a field experiment research was carried out. The research results show that: (1) Vacuum negative pressure reduced by at least 16% in the process of transferring to horizontal drainage cushion, and reduced by up to 57% in the process of transferring to the bottom of vertical drains. (2) For transfer properties of vacuum negative pressure in different depths, to a certain extent, it depends on dead weight sedimentation behavior of soils in different depths. The higher the content of coarse particles in certain depth is, the less the loss of vacuum negative pressure in corresponding depth is. But on the whole, the loss of vacuum negative pressure in the transfer path from vertical drains to soil is very serious, at least 67%, which is the main reason why soils strength is increased only a little after improved by no-sand vacuum preloading technology (NSVPT). At last, it is put forward that the distribution model of vacuum negative pressure. It is time-varying linear attenuation model when transferring in the horizontal drainage cushion; but it is time-varying nonlinear attenuation model when transferring in the vertical drains, depending on the site condition. |
| |
| Keywords: | fresh hydraulic reclamation muck foundation no-sand vacuum preloading technology (NSVPT) transfer properties of vacuum negative pressure distribution model of vacuum negative pressure |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
