[1]刘志彬,刘松玉,居俊,等.崇启大桥接线工程下部软土孔隙结构分析[J].东南大学学报(自然科学版),2012,42(3):531-535.[doi:10.3969/j.issn.1001-0505.2012.03.027]
 Liu Zhibin,Liu Songyu,Ju Jun,et al.Pore structure characteristics analysis of soft soil under connection project of Chongqi Bridge[J].Journal of Southeast University (Natural Science Edition),2012,42(3):531-535.[doi:10.3969/j.issn.1001-0505.2012.03.027]
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崇启大桥接线工程下部软土孔隙结构分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
42
期数:
2012年第3期
页码:
531-535
栏目:
土木工程
出版日期:
2012-05-20

文章信息/Info

Title:
Pore structure characteristics analysis of soft soil under connection project of Chongqi Bridge
作者:
刘志彬1 刘松玉1 居俊1 周伯明2
1 东南大学岩土工程研究所,南京 210096; 2 江苏省崇启大桥建设现场指挥部,启东 226255
Author(s):
Liu Zhibin1 Liu Songyu1 Ju Jun1 Zhou Boming2
1 Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China
2 Chongqi Bridge Onsite Headquarters of Jiangsu Province, Qidong 226255, China
关键词:
海陆交互相沉积土 软土 孔隙结构 压汞试验 流变试验
Keywords:
interactive marine and terrestrial deposit soft soil pore structure mercury intrusion porosimetry rheological test
分类号:
TU413
DOI:
10.3969/j.issn.1001-0505.2012.03.027
摘要:
利用压汞法对崇启大桥接线工程下部海陆交互相沉积软土不同深度原状样及某一深度流变样进行了孔隙结构分析.结果表明:接线工程沿线下部软土以颗粒间微孔隙为主,孔径范围在0.02~5 μm之间,其中21,26和30 m深处原状土微孔进汞孔径的峰值分别为0.865,0.351和1.3 μm; 其次是少量的团粒内和团粒间大孔隙,孔径在5~200 μm之间,呈多级分布特征.软土孔隙结构特征与其埋深有关,30 m深处原状样中仅含极少量的团粒内和团粒间大孔隙.经历固结压缩和蠕变变形后,软土的孔隙结构进行了重新分布,原状土中大孔隙含量明显减少.软土流变样微孔部分所对应的进汞孔径峰值减小,流变样内包含少量的颗粒内孔隙.
Abstract:
Mercury intrusion porosimetry(MIP)was adopted to study the pore structure characteristics of undisturbed soil specimens sampled from different depths and rheological specimen at a certain depth under the connection project of Chongqi Bridge. Test results indicate that pore structure of the soft soil mainly consists of interparticle pores whose entrance pore diameter varies between 0.02 and 5 μm. Corresponding peak values of such kind of micropores for undisturbed soil specimens at the depth of 21, 26 and 30 m are 0.865, 0.351 and 1.3 μm, respectively. Then there is a small part of intracluster and intercluster pores whose entrance pore diameter varies between 5 and 200 μm, and their structure is of multilevel characteristics. Pore structure of the soft soil is also influenced by its sample depth. There are few large intracluseter or intercluster pores in the 30 m depth soil specimen. Pore structure of the undisturbed soil specimen is redistributed after consolidation and creep deformation. Most of the large pores inside soft soil diminish, and the peak value of the entrance pore diameter corresponding to the part of micropore becomes smaller. Furthermore, small quantities of intraparticle pores are found in the rheological specimen.

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备注/Memo

备注/Memo:
作者简介: 刘志彬(1976— ),男,博士,讲师,seulzb@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(40802065)、江苏省交通厅资助项目(09Y33)、教育部博士点新教师基金资助项目(20100092120049).
引文格式: 刘志彬,刘松玉,居俊,等.崇启大桥接线工程下部软土孔隙结构分析[J].东南大学学报:自然科学版,2012,42(3):531-535. [doi:10.3969/j.issn.1001-0505.2012.03.027]
更新日期/Last Update: 2012-05-20