絮凝–逐级加压电渗法改良疏浚淤泥试验研究

doi:10.13722/j.cnki.jrme.2019.0819

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (1690 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Aiming at the problem of high energy consumption during electro-osmosis process and the uneven consolidation effect of dredged slurry by electro-osmosis method，the inorganic flocculant CaCl2 was used to optimize the traditional electro-osmosis method，and the dredged slurry was treated by the energization method of step-by-step voltage loading during electro-osmosis process. Meanwhile，the effect of flocculation-step-by-step loading voltage electro-osmosis method in the treatment of dredged slurry under different loading voltage levels and inorganic flocculant CaCl2 mixing ratio was studied. The thirteen laboratory tests were performed on dredged slurry. The test results show that，compared with the traditional electro-osmosis method，the flocculation- step-by-step loading voltage electro-osmosis method effectively reduces the non-electroosmotic energy consumption in the treatment of dredged slurry. Most of the electrical energy is used for the electroosmotic drainage，thereby increasing the drainage of soil. Meanwhile，the flocculation-step-by-step loading voltage electro-osmosis method effectively restrains the attenuation of circuit current，and improves the electro-osmotic drainage efficiency in the treatment of dredged slurry. Moreover，compared with the traditional electro-osmosis method，the flocculation-step-by-step loading voltage method has less anodic corrosion and better integrity of soil. In addition，in the treatment of dredged slurry by flocculation-step-by-step loading voltage electro-osmosis method，when the mixing ratio of inorganic flocculant CaCl2 is 1%，the more the loading voltage level，the better the reinforcement effect of dredged slurry.

Key words： soil mechanics electro-osmosis method flocculation dredged slurry loading voltage level mixing ratio

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	YUAN Guohui1
	2
	HU Xiuqing1
	2
	LIU Feiyu3
	TAO Yu3
	FU Hongtao4
	WANG Jun1
	2

Cite this article:

YUAN Guohui1,2,HU Xiuqing1, et al. Experimental study on the improvement of dredged slurry by flocculation-step-by-step loading voltage electro-osmosis method[J]. , 2020, 39(S1): 2995-3003.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0819 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/IS1/2995

[1]	WANG J，CAI Y Q，FU H T，et al. Experimental study on a dredged fill ground improved by a two-stage vacuum preloading method[J]. Soils and Foundations，2018，58(3)：766–775.
[2]	ASAVADORNDEJA P，GLAWE U. Electrokinetic strengthening of soft clay using the anode depolarization method[J]. Bulletin of Engineering Geology and the Environment，2005，64(3)：237–245.
[3]	LI X B，ZHAO R，FU H T，et al. Slurry improvement by vacuum preloading and electro-osmosis[J]. Proceedings of the Institution of Civil Engineers-Geotechnical Engineering，2018，172(2)：1–36.
[4]	庄艳峰，王钊，林清. 电渗的能级梯度理论[J]. 哈尔滨工业大学学报，2005，37(2)：283–286.(ZHUANG Yanfeng，WANG Zhao，LIN Qing. Energy level gradient theory for electro-osmotic consolidation[J]. Journal of Harbin Institute of Technology，2005，37(2)：283–286.(in Chinese))
[5]	RITTIRONG A，SHANG J Q，MOHAMEDELHASSAN E，et al. Effects of electrode configuration on electrokinetic stabilization for caisson anchors in calcareous sand[J]. Journal of Geotechnical and Geoenvironmental Engineering，2008，134(3)：352–365.
[6]	MICIC S，SHANG J Q，LO K Y，et al. Electrokinetic strengthening of a marine sediment using intermittent current[J]. Canadian Geotechnical Journal，2001，38(2)：287–302.
[7]	GARY D H，SOMOGYI F. Electro-osmotic dewatering with polarity reversals[J]. Journal of the Geotechnical Engineering Division，1977，103(1)：51–54.
[8]	LO K Y，HO K S，INCULET I. Field test of electroosmotic strengthening of soft sensitive clays[J]. Canadian Geotechnical Journal，1991，28(1)：74–83.
[9]	GLENDINNING S，LAMONT-BLACKJ，JONES C J F P. Treatment of sew-age sludge using electrokinetic geosynthetics[J]. Journal of Hazardous Materials，2007，139(3)：491–499.
[10]	CHEW S H，KARUNARATNE G P，KUMA V M，et al. A field trial for soft clay consolidation using electric vertical drains[J]. Geotextiles and Geo-membranes，2004，22(1/2)：17–35.
[11]	龚晓南，焦丹. 间歇通电下软黏土电渗固结性状试验分析[J]. 中南大学学报：自然科学版，2011，42(6)：1 725–1 730.(GONG Xiaonan，JIAO Dan. Experimental study of electro-osmotic consolidation of soft clay under intermittent current condition[J]. Journal of Central South University：Science and Technology，2011，42(6)：1 725–1 730.(in Chinese))
[12]	OU C Y，CHIEN S C，WANG Y G. On the enhancement of electroosmotic soil improvement by the injection of saline solutions[J]. Journal of Applied Clay Science，2009，44(1/2)：130–136.
[13]	胡俞晨，王钊，庄艳峰. 电动土工合成材料加固软土地基实验研究[J]. 岩土工程学报，2005，27(5)：582–586.(HU Yuchen，WANG Zhao，ZHUANG Yanfeng. Experimental studies on electro-osmotic consolidation of soft clay using EKG electrodes[J]. Chinese Journal of Geotechnical Engineering，2005，27(5)：582–586.(in Chinese))
[14]	VIJH A K. Salient experimental observation on the electroosmotic dewatering (EOD) of clays and sludges and their interpretation[J]. Drying Technology，1999，17(3)：575–584.
[15]	KARUNARATNE G P. Prefabricated and electrical vertical drains for consolidation of soft clay[J]. Geotextiles and Geomembranes，2011，29(4)：391–401.
[16]	房营光，徐敏，朱忠伟. 碱渣土的真空-电渗联合排水固结特性试验研究[J]. 华南理工大学学报：自然科学版，2006，34(11)：70–75.(FANG Yingguang，XU min，ZHU Zhongwei. Experimental investigation into draining consolidation behavior of soda residue soil under vacuum preloading electro-osmosis[J]. Journal of South China University of Technology：Natural Science，2006，34(11)：70–75.(in Chinese))
[17]	刘飞禹，宓炜，王军，等. 逐级加载电压对电渗加固吹填土的影响[J]. 岩石力学与工程学报，2014，33(12)：2 582–2 591.(LIU Feiyu，MI Wei，WANG Jun，et al. Influence of applying stepped voltage in electro-osmotic reinforcement of dredger fill，2014，33(12)：2 582–2 591.(in Chinese))
[18]	BOIKO I V. Electrochemical hardening of argillaceous soils[J]. Journal of Applied Chemistry of the USSR，1956，29(3)：203–223.
[19]	BJERRUM L，MOUM J，EIDE O. Application of electro-osmosis to a foundation problem in a norwegian quick clay[J]. Geotechnique，1967，17(3)：214–235.
[20]	OU C Y，CHIEN S C，WANG Y G. On the enhancement of electroosmotic soil improvement by the injection of saline solutions[J]. Applied Clay Science，2009，44(1)：130–136.
[21]	LIU F Y，FU H T，WANG J，et al. Influence of soluble salt on electro-osmotic consolidation of soft clay[J]. Soil Mechanics and Foundation Engineering，2017，54(1)：49–55.
[22]	TAO Y L，GONG X N，CHEN Z，et al. Ground improvement and geosynthetics-influence of polarity reversal and current intermittence on electro-osmosis[C]// Proceedings of the Geo-Shanghai Conference. [S. l.]：American Society of Civil Engineers，2010：198–208.
[23]	GUPTA A K，COELHO D，ADLER P M. Influence of the Stern layer on electrokinetic phenomena in porous media[J]. Journal of Colloid and Interface Science，2007，316(1)：140–159.
[24]	李瑛，龚晓南，张雪婵. 电压对一维电渗排水影响的试验研究[J]. 岩土力学，2011，32(3)：709–714.(LI Ying，GONG Xiaonan，ZHANG Xuechan. Experimental research on effect of applied voltage on one-dimensional electroosmotic drainage[J]. Rock and Soil Mechanics，2012，32(3)：709–714.(in Chinese))
[25]	MORRIS D V，HILLS S F，CALDWELL J A. Improvement of sensitive silty clay by electro-osmosis[J]. Canadian Geotechnical Journal，1985，22(1)：17–24.