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

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摘要针对电渗法处理疏浚淤泥过程中存在能耗大以及处理后土体不均匀问题，提出采用无机絮凝剂CaCl2来优化传统电渗法，并在电渗过程中采用逐级加载电压的通电方式处理疏浚淤泥；同时研究在不同加载电压级数和无机絮凝剂CaCl2掺入比下，絮凝–逐级加压电渗法对疏浚淤泥的加固效果。对疏浚淤泥共进行13组室内模型试验，结果表明：絮凝–逐级加压电渗法有效减小了传统电渗法处理疏浚淤泥过程中非电渗能耗的损失，使得大部分电能都用于电渗排水作用，增加了土体出流量；同时，较传统电渗法而言，有效抑制了电路电流的衰减，提高了电渗中后期排水效率；且絮凝–逐级加压电渗法与传统电渗法相比，阳极腐蚀量更小，处理后土体整体性更好；在絮凝–逐级加压电渗法处理疏浚淤泥过程中，当无机絮凝剂CaCl2掺入比为1%，且加载电压级数越多，加固效果越好。

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	袁国辉1
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	胡秀青1
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	刘飞禹3
	陶宇3
	符洪涛4
	王军1
	2

关键词 ：土力学, 电渗法, 絮凝, 疏浚淤泥, 加载电压级数, 掺入比

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

引用本文:

袁国辉1，2，胡秀青1，2，刘飞禹3，陶宇3，符洪涛4，王军1，2. 絮凝–逐级加压电渗法改良疏浚淤泥试验研究[J]. 岩石力学与工程学报, 2020, 39(S1): 2995-3003.
YUAN Guohui1，2，HU Xiuqing1，2，LIU Feiyu3，TAO Yu3，FU Hongtao4，WANG Jun1，2. Experimental study on the improvement of dredged slurry by flocculation-step-by-step loading voltage electro-osmosis method. , 2020, 39(S1): 2995-3003.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0819 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/IS1/2995

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