孙召花,吴添玥,Cauderty Munashe Kasu
SUN Zhaohua,WU Tianyue,Cauderty Munashe Kasu

• 1:南通大学交通与土木工程学院

摘要(Abstract)：

常规真空-电渗联合加固法采用新型电动土工合成材料导电塑料排水板（EVD）作为电极时，在阳极附近的真空渗流和电渗流相互干扰，从而影响加固效果。针对这个问题，提出真空-电渗异步加固设计方法，具体包括电渗系统设计、根据电源功率确定分区面积、真空预压系统设计及真空预压与电渗异步加固时间的确定等，并将该设计方法应用于温州围海造地吹填土地基现场试验的工程设计。实践证明，依据真空-电渗异步加固设计方法加固超软吹填土地基施工具有可行性，加固效果明显、工期短、经济效益高，能够为吹填土地基处理方案提供决策依据，对现场施工及工程效益评价具有重要的指导意义。
Vacuum flow and electroosmosis flow near the anodes interfere with each other when vacuum preloading combined with electroosmosis using electric vertical drains(EVD) as electrodes, which affect the reinforcement effect.This study proposed a design method of vacuum-electroosmotic asynchronous reinforcement to avoid this problem. It includes the design of electroosmosis system and vacuum preloading system, the reinforcement area according to the power supply, and the alternating time of vacuum preloading and electroosmosis, etc. At the same time, the design method was applied to the field test in Wenzhou coastal reclamation projects. The results prove that the ultra-soft dredger fill is effectively reinforced with short time and high financial benefit according to the design method. It can provide decision basis for choosing the optimal dredger fill foundation treatment scheme and has important guiding significance for the field construction and project benefit evaluation.

关键词(KeyWords)： 吹填土地基;真空预压;电渗;异步固结设计
dredger fill;vacuum preloading;electroosmosis;consolidation design

Abstract:

Keywords:

基金项目(Foundation): 住房和城乡建设部科学技术项目（2019-K-010）;; 江苏省研究生科研与实践创新计划项目（KYCX21＿3091）

作者(Author): 孙召花,吴添玥,Cauderty Munashe Kasu
SUN Zhaohua,WU Tianyue,Cauderty Munashe Kasu

参考文献(References)：

• [1]王亮，黄英豪，张春雷，等.吹填淤泥自重固结性质试验研究[J].岩土工程学报，2017, 39(3):444-451.WANG L, HUANG Y H, ZHANG C L, et al. Experimental study on self-weight consolidation behavior of hydraulically dredged slurries[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(3):444-451.(in Chinese)
• [2]郑耀林，章荣军，郑俊杰，等.絮凝-固化联合处理超高含水率吹填淤泥浆的试验研究[J].岩土力学，2019, 40(8):3107-3114.ZHENG Y L, ZHANG R J, ZHENG J J, et al. Experimental study of flocculation-solidification combined treatment of hydraulically dredged mud at extra high-water content[J]. Rock and Soil Mechanics, 2019, 40(8):3107-3114.(in Chinese)
• [3]李学，刘治清，宋晶，等.有机质在吹填淤泥固结中的微宏观特征[J].中国海洋大学学报（自然科学版），2017,47(10):28-35.LI X, LIU Z Q, SONG J, et al. Micro-macro characteristics of organic matters in dredger fill consolidation[J]. Periodical of Ocean University of China, 2017, 47(10):28-35.(in Chinese)
• [4]蔡袁强.吹填淤泥真空预压固结机理与排水体防淤堵处理技术[J].岩土工程学报，2021, 43(2):201-225.CAI Y Q. Consolidation mechanism of vacuum preloading for dredged slurry and anti-clogging method for drains[J].Chinese Journal of Geotechnical Engineering, 2021, 43(2):201-225.(in Chinese)
• [5]杨茯苓，董志良，鲍树峰，等.新近吹填淤泥地基新型大面积砂被工作垫层工艺技术研发[J].重庆交通大学学报（自然科学版），2018, 37(2):66-75.YANG F L, DONG Z L, BAO S F, et al. Technology research and development of new type of large area sandquilt-cushion for newly hydraulic reclamation mud foundation[J]. Journal of Chongqing Jiao tong University(Natural Science), 2018, 37(2):66-75.(in Chinese)
• [6]龚永康，郑丽华，蔡建.真空预压法处理新近吹填淤泥非饱和带研究[J].水运工程，2017(2):155-159.GONG Y K, ZHENG L H, CAI J. Treatment of newly blown muck unsaturated zone by vacuum preloading[J].Port and Waterway Engineering, 2017(2):155-159.(in Chinese)
• [7]冯军，刘爱民，高潮，等.土性对真空预压加固效果影响的室内试验研究[J].水运工程，2010(3):50-55.FENG J, LIU A M, GAO C, et al. Laboratory tests of influence of soil indicator on validity of vacu um preloading[J]. Port&Waterway Engineering, 2010(3):50-55.(in Chinese)
• [8]闫澍旺，孙立强，李伟，等.真空加固超软土工艺的室内模型试验研究[J].岩土工程学报，2011, 33(3):341-347.YAN S W, SUN L Q, LI W, et al. Model tests on vacuum preloading technology of super-soft soil[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(3):341-347.(in Chinese)
• [9]孙立强，闫澍旺，李伟，等.超软土真空预压室内模型试验研究[J].岩土力学，2011, 32(4):984-990.SUN L Q, YAN S W, LI W, et al. Study of super-soft soil vacuum preloading model test[J]. Rock and Soil Mechanics, 2011, 32(4):984-990.(in Chinese)
• [10]龚晓南，岑仰润，李昌宁.真空排水预压加固软土地基的研究现状及展望[C]//地基处理理论与实践———第七届全国地基处理学术讨论会论文集.兰州：中国土木工程学会，2002:16-20.
• [11] CASAGRANDE I L. Electro-osmosis in soils[J]. Géotechnique, 1949, 1(3):159-177.
• [12]崔允亮.吹填软土地基加固试验与理论分析[D].南京：河海大学，2013.CUI Y L. Reclaimed soft ground improvement test and theoretical analysis[D]. Nanjing:Hohai University, 2013.(in Chinese)
• [13]李瑛.软黏土地基电渗固结试验和理论研究[D].杭州：浙江大学，2011.LI Y. Experimental and theoretic study on electro-osmotic consolidation of soft clay foundation[D]. Hangzhou:Zhejiang University, 2011.(in Chinese)
• [14]吴辉.软土地基电渗加固方法研究[D].北京：清华大学，2015.WU H. Soft soil improvement by electro-osmosis techniques[D]. Beijing:Tsinghua University, 2015.(in Chinese)
• [15]薛志佳.电渗加固软土地基影响因素和方法研究[D].大连：大连理工大学，2017.XUE Z J. A study on the influence factors and novel methods of soft soil improvement by electro-osmosis techniques[D]. Dalian:Dalian University of Technology, 2017.(in Chinese)
• [16] KARUNARATNE G P. Prefabricated and electrical vertical drains for consolidation of soft clay[J]. Geotextiles and Geomembranes, 2011, 29(4):391-401.
• [17] SUN Z H, GAO M J, YU X J. Vacuum preloading combined with electro-osmotic dewatering of dredger fill using electric vertical drains[J]. Drying Technology, 2015, 33(7):847-853.
• [18] WANG J, MA J J, LIU F Y, et al. Experimental study on the improvement of marine clay slur ry by electroosmosisvacuum preloading[J]. Geotextiles and Geomembranes, 2016,44(4):615-622.
• [19] HU J L, LI X B, ZHANG D K, et al. Experimental study on the effect of additives on drainage consolidation in vacuum preloading combined with electroosmosis[J]. KSCE Journal of Civil Engineering, 2020, 24(9):2599-2609.
• [20] LIU F Y, TAO Y, NI J F, et al. Slurry im provement by vacuum pre-loading in combination with electro-osmosis and with dynamic compaction method[J]. Marine Georesources and Geotechnology, 2021, 39(6):709-718.
• [21]庄艳峰，王钊.电渗固结中的界面电阻问题[J].岩土力学，2004, 25(1):117-120.ZHUANG Y F, WANG Z. Study on interface electric resistance of electro-osmotic consolidation[J]. Rock and Soil Mechanics, 2004, 25(1):117-120.(in Chinese)
• [22]《工程地质手册》编委会.工程地质手册（第五版）[M].北京：中国建筑工业出版社，2018.

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