[1]郭玉良,曹丽文,冯雪寒,等.曹妃甸区固化吹填土的固化机理及其工程性质[J].西安建筑科技大学学报(自然科学版),2020,52(06):869-872+888.[doi:10.15986/j.1006-7930.2020.06.013 ]
　GUO Yuliang,CAO Liwen,FENG Xuehan,et al.Engineering properties and solidification mechanism of solidified dredger fill in Caofeidian Area[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(06):869-872+888.[doi:10.15986/j.1006-7930.2020.06.013 ]
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曹妃甸区固化吹填土的固化机理及其工程性质()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年06期
页码:
869-872+888
栏目:
出版日期:
2020-12-20

文章信息/Info

Title:
Engineering properties and solidification mechanism of solidified dredger fill in Caofeidian Area
文章编号:
1006-7930(2020)06-0869-04
作者:
郭玉良1;  曹丽文1;  冯雪寒2;  韩 科
(1. 中国矿业大学 资源与地球科学学院,江苏 徐州 221116; 2. 上海市政工程设计研究总院(集团)有限公司 南京分公司,江苏 南京 210000)
Author(s):
GUO Yuliang1;  CAO Liwen1;  FENG Xuehan2;  HAN Ke1
(1. School of Resources and Geosciences, China University of Mining and Technology,Jiangsu Xuzhou 221116, China; 2.Shanghai Municipal Engineering Design Institute(Group)Co., Ltd.,Nanjing Company, Nanjing 210000, China)
关键词:
吹填土;  固化土;  PAM;  Na2SiO3;  机理
Keywords:
dredger fill;  solidified soil;  PAM;  Na2SiO3;  mechanism
分类号:
TU448
DOI:
10.15986/j.1006-7930.2020.06.013
文献标志码:
A
摘要:
在对曹妃甸区吹填土进行了室内物理化学性质检测的基础上,测试研究了三种固化吹填土的工程性质,探讨了养护龄期、Na2SiO3掺比、PAM的掺比3个控制因素对吹填土工程性质影响的显著性水平,并从微观角度揭示了固化机理.研究结果表明:曹妃甸区吹填土为细粒土(粉土),级配不良土,成分以石英为主,并含有一定量黏土矿物; PAM + Na2SiO3固化吹填土的工程性质要好于Na2SiO3固化吹填土和PAM固化吹填土; 对吹填土工程性质影响的显著性水平由强到弱依次为养护龄期、Na2SiO3掺比、PAM掺比; PAM在吹填土颗粒间产生吸附作用和架桥作用,Na2SiO3在土颗粒间产生吸附作用并与土体发生化学反应.在两种固化剂的联合固化作用下,吹填土可获得更好的工程性质.
Abstract:
Based on the indoor physical and chemical properties of dredger fill in Caofeidian area, the engineering properties of three kinds of solidified dredger fill were tested and studied. The significance of three curing factors, such as curing age, Na2SiO3 mixing ratio and PAM ratio, on the engineering properties of dredger fill were discussed, and the curing mechanism was revealed from a micro perspective. Results show that the dredger fill in Caofeidian area is fine-grained soil(silt), poorly graded soil, with quartz as the main component and a certain amount of clay minerals. The engineering properties of PAM + Na2SiO3 solidified dredger fill are better than Na2SiO3 solidified dredger fill and PAM solidified dredger fill. The significant level of influence on the engineering properties of dredger fill from strong to weak is curing age, Na2SiO3 incorporation ratio and PAM incorporation ratio. PAM adsorbs and bridges between dredger fills, Na2SiO3 adsorbs between soil particles and reacts with soil chemically. Under the combined solidification of two solidifying agents, dredger fill can obtain better engineering properties.

参考文献/References:

[1] SU X P, SONG J. Physical and chemical characteristics of high clay content dredger fill in different regions[J]. Applied Mechanics and Materials, 2013, 477/478: 614-619.
[2] 鲍树峰, 董志良, 莫海鸿, 等. 高黏粒含量新吹填淤泥加固新技术室内研发[J]. 岩土力学, 2015, 36(1): 61-67.
BAO Shufeng, DONG Zhiliang, MO Haihong, et al. Laboratory tests on new reinforcement technology of newly hydraulic reclamation mud with high clay content[J]. Rock and Soil Mechanics, 2015, 36(1): 61-67.
[3] SUN L Q, JIA T Q, ZHUO R H, et al. Numerical solutions for consolidation of under-consolidated dredger fill under vacuum preloading[J]. Journal of Coastal Research, 2015, 73(10): 277-282.
[4] TANG L S, SONG J, CHEN H K, et al. Impacts of organic content and pH on consolidation of clayey dredger fill by vacuum preloading method[J]. Geosciences Journal, 2017, 21(5): 1-14.
[5] SUN Z H, GAO M J, YU X J. Dewatering effect of vacuum preloading incorporated with electro-osmosis in different ways[J]. Drying Technology, 2017, 35(1): 38-45.
[6] 刘莹, 王清. 水泥与生石灰处理吹填土对比试验研究[J]. 工程地质学报, 2006, 14(3): 424-429.
LIU Ying, WANG Qing. Laboratory model tests on consolidation of hydraulic fills treated with lime or cement additives[J]. Journal of Engineering Geology, 2006, 14(3): 424-429.
[7] 谢海澜, 王清. 粉煤灰加固处理吹填泥浆的试验研究[J]. 岩石力学与工程学报, 2004, 24(10): 1811-1816.
XIE Hailan, WANG Qing. Experimental study on consolidation of dredger fill slurry with fly ash[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 24(10): 1811-1816.
[8] JO A N, HAFEZ M A, NORBAYA S. Study of bearing capacity of lime-cement columns with pulverized fuel ash for soil stabilization using laboratory model[J]. Electr J Geotech Eng, 2011, 16: 1595-1605.
[9] 李海龙, 刘科, 沈扬, 等. 水泥-生石灰固化吹填土路用特性试验研究[J]. 水利与建筑工程学报, 2014, 12(2): 51-57.
LI Hailong, LIU Ke, SHEN Yang, et al. Experimental research on road-used performance of dredger fill with cement-lime curing[J].Journal of Water Resources and Architectural Engineering, 2014, 12(2): 51-57.
[10]刘科, 沈扬, 刘汉龙. 水泥 - 生石灰固化吹填土无侧限抗压强度试验研究[J].土木工程与管理学报, 2012, 29(3): 94-98.
LIU Ke, SHEN Yang, LIU Hanlong. Experimental study on unconfined compressive strength of hydraulic fill consolidated by adding cement and lime[J]. Journal of Civil Engineering and Management, 2012, 29(3): 94-98.

备注/Memo

备注/Memo:
收稿日期:2020-04-24 修改稿日期:2020-09-15
基金项目:国家自然科学基金项目(41972281, 41372326, 41072236)
第一作者:郭玉良(1992-),男,博士生,主要从事工程地质与环境岩土工程方面的研究.E-mail:guoyuliang@cumt.edu.cn 通信作者:曹丽文(1969-),女,博士,教授,主要从事工程地质与环境岩土工程方面的研究.E-mail:caoliwen@cumt.edu.cn

更新日期/Last Update: 2020-12-20