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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
    
Laboratory research on new improvement technology of newly hydraulic reclamation mud with high clay content Ⅱ
BAO Shu feng1,2,3, DONG Zhi liang1,2, LOU Yan1,2,4, MO Hai hong3, CHEN Ping shan1,2, ZHOU Hong xin1,2, LUO Yan1,2
1. CCCC Fourth Harbor Engineering Institute Limited Company,  Guangzhou 510230,China； 2. CCCC Key Laboratory of Environmental Protection and Safety in Foundation Engineering of Transportation, Guangzhou 510230, China；3. School of Civil Engineering and Transportation, South China University of Technology,
Guangzhou 510641, China；4. Nanjing Hydraulic Research Institute, Nanjing 739462, China
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Abstract  

In order to explore the feasibility of one time improving newly hydraulic reclamation mud foundation with high content of clay particles,the vacuum consolidation mechanism for mud was deeply analyzed, and several comparative single well model experiments were performed in laboratory considering the staged loading mode of vacuum pressure and several different types of vertical drain. Results indicated that the characteristic opening size (O95) of  filter for vertical drain was suggested with ranging from 0075 mm to 0210 mm, the medium and coarse sands with its diameter from 0100 mm to 0.810 mm should be used as filling for sand drained well, and their permeability coefficient was larger than 5×10-3 cm/s. When vertical drain were chosen with the medium characteristic opening size (such as O95=015 mm), the step loading of vacuum pressure should be advised with the relatively fast loading rate．

Published: 15 October 2015
CLC:  TU 447  
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BAO Shu feng, DONG Zhi liang, LOU Yan, MO Hai hong, CHEN Ping shan, ZHOU Hong xin, LUO Yan. Laboratory research on new improvement technology of newly hydraulic reclamation mud with high clay content Ⅱ. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2015, 49(9): 1707-1715.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008 973X.2015.09.013     OR     http://www.zjujournals.com/eng/Y2015/V49/I9/1707


高黏粒含量新近吹填淤泥加固新技术室内研发Ⅱ

为了探讨高黏粒含量新近吹填淤泥地基真空预压一次性处理的可行性,对该类地基的真空固结机理进行深入分析,有针对性地开展分级真空预压条件下不同竖向排水体的室内单井模型对比实验研究.结果表明：竖向排水体反滤层的等效孔径O95应为0075～0210 mm,袋装砂井应采用粒径范围为0100～0810 mm的中粗砂作为填充体,两者的渗透系数都应不小于5×10-3 cm/s；当竖向排水体反滤层采用中等等效孔径(如：O95=0150 mm)时,可以采用较快的真空荷载加载速率对高黏粒含量新近吹填淤泥地基进行分级真空预压加固.

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