不同水化学环境条件下吹填土的自重固结特性

doi:10.13722/j.cnki.jrme.2019.1099

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Abstract In order to investigate the effect of hydro-chemical conditions on the self-weight settlement of dredged fill，the cylinder settlement test was carried out in this study，and the settlement and settlement rate were analyzed. In addition，the change in the ion content of the supernatant was determined by titration tests after the sedimentation，and the effect of hydro-chemical conditions on the self-consolidation of dredged fill and the respectively micro-mechanism were investigated. The results show that both alkaline(pH = 10) and acidic(pH = 2) conditions could effectively improve the settlement rate of the dredged fill at initial stage，while the final settlement gradually decreased with the increase of pH value. With the increase of Ca2+ content，the settlement and the settlement rate of dredged fill increased under acidic and neutral conditions，and the settlement and settlement rate of dredged fill showed a trend of increasing first，then decreasing and finally being stable under alkaline condition. The results in this study are meaningful for improving the settlement of dredged fill.

Key words： soil mechanics dredged fill consolidation settlement pH value Ca2+content settling mechanism intergranular stress

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	Articles by authors
	LEI Huayang1
	2
	ZHANG Weidi 1
	BO Yu1
	WANG Lei 1
	WANG Peng1

Cite this article:

LEI Huayang1,2,ZHANG Weidi 1, et al. Self-consolidation characteristics of the dredged fill under different hydro-chemical conditions[J]. , 2020, 39(S1): 3049-3057.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.1099 OR http://rockmech.whrsm.ac.cn/EN/Y2020/V39/IS1/3049

[16]	中华人民共和国国家标准编写组. GB/T50145—2007 土的工程分类标准[S]. 北京：中国计划出版社，2007.(The National Standards Compilation Group of People?s Republic of China. GB/T50145—2007 Standard for engineering classification of soil[S]. Beijing：China Planning Press，2007.(in Chinese))
[18]	IMAI G. Settling behavior of clay suspension[J]. Soils and Foundations，1980，20(2)：61–77.
[20]	龚明光. 泡沫浮选[M]. 北京：冶金工业出版社，2007：31.(GONG Mingguang. Froth flotation[M]. Beijing：Metallurgical Industry Press，2007：31.(in Chinese))
[3]	CHEN J，ANANDARAJAH A. Influence of pore fluid composition on volume of sediments in kaolinite suspensions[J]. Clays and Clay Minerals，1998，46(2)：145–152.
[6]	杨坪，唐益群，王建秀，等．基于大变形的冲填土自重固结分析及离心模型试验[J]. 岩石力学与工程学报，2007，26(6)：1 212–1 219.(YANG Ping，TANG Yiqun，WANG Jianxiu，et al. Study on consolidation settlement of dredger fill under deadweight using large strain theory and centrifuge model test[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(6)：1 212–1 219.(in Chinese))
[8]	王军，曹平，赵延林，等. 水土化学作用对土体抗剪强度的影响[J]. 中南大学学报：自然科学版，2010，41(1)：245–250.(WANG Jun，CAO Ping，ZHAO Yanlin，et al. Influence of chemical action of water-soil on soil shear strength[J]. Journal of Central South University：Science and Technology，2010，41(1)：245–250.(in Chinese))
[19]	叶国良，郭述军，朱耀庭. 超软土的工程性质分析[J]. 中国港湾建设，2010，170(5)：1–8.(YE Guoliang，GUO Shujun，ZHU Yaoting. Analysis on engineering property of super soft soil[J]. China Harbour Engineering，2010，170(5)：1–8.(in Chinese))
[10]	DI M C，SANTOLI L，SCHIAVONE P. Volume change behaviour of clays：the influence of mineral composition，pore fluid composition and stress state[J]. Mechanics of materials，2004，36(5)：435–451.
[13]	WEI C F. A theoretical framework for modeling the chemomechanical behavior of porous media with multiphases and multispecies[C]// Proceedings of the 23rd International Congress of Theoretical and Applied Mechanics. [S. l]：[s. n.]，2012：288.
[1]	董志良，张功新. 天津滨海新区吹填造陆浅层超软土加固技术研发及应用[J]. 岩石力学与工程学报，2011，30(5)：1 074–1 080.(DONG Zhiliang，ZHANG Gongxin. Research and application of improvement technology of shallow super soft soil formed by hydraulic reclamation in tianjin binhai new area[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(5)：1 074–1 080.(in Chinese))
[4]	KAYA A，OREN A H，YILKSELEN Y. Settling of kaolinite in different aqueous environment[J]. Marine Georesources and Geotechnology，2006，24(3)：203–218.
[14]	颜荣涛，纪文栋，陈星欣，等. 盐溶液饱和黏土的力学行为模拟[J].岩土力学，2018，39(2)：546–552.(YAN Rongtao，JI Wendong，CHEN Xingxin，et al. Modeling mechanical behaviors of clayey soil saturated by salt solution[J]. Rock and Soil Mechanics，2018，39(2)：546–552.(in Chinese))
[2]	LIU J J，LEI H Y，ZHENG G，et al. Improved synchronous and alternate vacuum preloading method for newly dredged fills：laboratory model study[J]. International Journal of Geomechanics，2018，18(8)：04018086.
[5]	刘莹，王清. 江苏连云港地区吹填土室内沉积试验研究[J]．地质通报，2006，(6)：762–765.(LIU Ying，WANG Qing. Laboratory tests for the sedimentation of dredger fill in the Lianyungang area[J]. Geological Bulletin of China，2006，(6)：762–765.(in Chinese))
[7]	孔令伟，吕海波，汪稔，等. 海口某海域软土工程特性的微观机制浅析[J]. 岩土力学，2002，23(1)：36–40.(KONG Lingwei，LU Haibo，WAN Ren，et al. Preliminary analysis of micro-mechanism for soft soil in a sea area engineering properties Haikou[J]. Rock and Soil Mechanics，2002，23(1)：36–40.(in Chinese))
[9]	周东，焦文灿，吴恒，等. 上覆荷载作用下钦州海积软土孔隙结构特征变化[J]. 桂林理工大学学报，2017，37(1)：81–87.(ZHOU Dong，JIAO Wencan，WU Heng，et al. Pore structure changes for marine soft soil under overlying loadings[J]. Journal of Guilin University of Technology，2017，37(1)：81–87.(in Chinese))
[11]	MAINES M，GAJO A. Mechanical effects of aqueous solutions of inorganic acids and bases on a natural active clay[J]. Géotechnique，2007，57(8)：687–699.
[12]	WEI C F. A Theoretical framework for modeling the chemomechanical behavior of unsaturated soils[J]. Vadose Zone Journal，2014，13(9)：1–21.
[15]	杨德欢，颜荣涛，韦昌富，等. 饱和黏土平均粒间应力的确定方法[J]. 岩土力学，2019，40(6)：2 075–2 084.(YANG Dehuan，YAN Rongtao，WEI Changfu，et al. Determination method of average intergranular stresses in saturated clays[J]. Rock and Soil Mechanics，2019，40(6)：2 075–2 084.(in Chinese))
[17]	武冬青，董志良，徐文雨. 化学–物理复合法在海底淤泥填海造地工程中的应用[J]. 岩石力学与工程学报，2013，32(9)：1 779–1 784.(WU Dongqing，DONG Zhiliang，XU Wenyu. Application of chemical-physical combined method to land reclamation using seabed marine clay[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(9)：1 779–1 784.(in Chinese))
[21]	李伟荣，刘令云，闵凡飞，等. pH值对微细高岭石颗粒聚团特性的影响机制[J]. 中国矿业大学学报，2016，45(5)：1 022–1 029.(LI Weirong，LIU Lingyun，MIN Fanfei，et al. Agglomeration characteristics and mechanism analysis of fine kaolinite particles under different pH conditions[J]. Journal of China University of Mining and Technology，2016，45(5)：1 022–1 029.(in Chinese))