[1]杨展鹏,汤家郗,宋 琢.分层强夯联合电渗法处理疏浚淤泥宏细观试验研究[J].华南地震,2022,(03):85-93.[doi:10.13512/j.hndz.2022.03.11]
 YANG Zhanpeng,TANG Jiaxi,SONG Zhuo.Macro and Micro Experiment on Dredged Slurry Treatment by Layered Dynamic Compaction Combined with Electro-osmosis Method[J].,2022,(03):85-93.[doi:10.13512/j.hndz.2022.03.11]
点击复制

分层强夯联合电渗法处理疏浚淤泥宏细观试验研究()
分享到:

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年03期
页码:
85-93
栏目:
土木工程防震减灾
出版日期:
2022-09-15

文章信息/Info

Title:
Macro and Micro Experiment on Dredged Slurry Treatment by Layered Dynamic Compaction Combined with Electro-osmosis Method
文章编号:
1001-8662(2022)03-0085-09
作者:
杨展鹏1汤家郗2宋 琢3
1.广州市广园市政建设有限公司,广州 510040;2.上海大学土木工程系,上海 200444;3.广州一建建设集团有限公司,广州 510060
Author(s):
YANG Zhanpeng1TANG Jiaxi2SONG Zhuo3
1.Guangyuan Municipal Construction Co.,Ltd., Guangzhou 510040,China;2.Department of Civil Engineering, Shanghai University, Shanghai 200444, China;3.Canton One Construction Group Co., Ltd., Guangzhou 510040, China
关键词:
地基处理宏观结构细观结构电渗法疏浚淤泥
Keywords:
Foundation treatmentMacro structureMicro structureElectro-osmosis methodDredged slurry
分类号:
U416.1
DOI:
10.13512/j.hndz.2022.03.11
文献标志码:
A
摘要:
为提高强夯联合电渗法处理疏浚淤泥的效果,提出了分层强夯联合电渗法处理疏浚淤泥的方法。设计了4组室内模型试验,分别采用纯电渗、分1层、2层及3层强夯联合电渗法对疏浚淤泥进行处理,研究分层强夯联合电渗法的处理效果,并通过扫描电镜分析了试验后阴极附近土体的孔隙特征。结果表明:分层强夯联合电渗法加固效果优于纯电渗法,且分层数越多、促进效果越好;分3层强夯的排水量达到6.35kg、电流强度的衰减得到了较好的抑制效果;分3层强夯比纯电渗法的排水量增加了37.15%,十字板剪切强度增加了41.42%;电镜扫描结果显示,分3层强夯时阴极附近的土体裂缝明显减少,均一化程度最高。
Abstract:
In order to improve the effect of treating dredged slurry, the method of layered dynamic compaction combined with electro-osmosis was proposed. 4 groups of laboratory model tests were designed, and the dredged slurry was treated by pure electro-osmosis, 1-layer, 2-layer and 3-layer dynamic compaction combined with electro-osmotic method. The paper studied the treatment effect of layered dynamic compaction combined with electro-osmosis, and analyzed the pore characteristics of the soil near the cathode by scanning electron microscope. The results show that the reinforcement effect of layered dynamic compactions combined with electroosmosis is better than that of electro-osmosis alone, and the more layers, the better the promotion effect;the drainage of the 3-layered is 6.35 kg and the attenuation of current is well restrained;the drainage of 3-layered compared with electro-osmosis increased by 37.15% and the vane shear strength increased by 41.42%; the SEM results showed that the soil cracks near the cathode were significantly reduced and the degree of homogenization was the highest during 3-layered dynamic compaction.

参考文献/References:

[1] Liu F,Li Z,Yuan G H,et al. Improvement of dredger fill by stepped vacuum preloading combined with stepped voltage electro-osmosis[J]. Marine Georesourcesand Geotechnology, 2021,39(7):822-831.
[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(08):1-16
[3] 刘飞禹,汤家郗,袁国辉,等.纤维加筋优化电渗法处理疏浚淤泥的试验研究[J].岩石力学与工程学报,2021,40 (12):2545-2552.
[4] 刘飞禹,李玲玉,王军,等.阳极灌浆溶液对电渗加固软土地基的影响[J].中国公路学报,2019,32(03):44-52.
[5] Liu F Y,Fu H T,Wang J,et al. Influence of soluble salt on electro-osmotic consolidation of soft clay[J]. Soil Mecha-nics and Foundation Engineering,2017,54(1):49-55.
[6] Kaniraj S R. Soft soil improvement by electro-osmotic consolidation[J]. International Journal of Integrated Engineering,2014,6(02):42-51.
[7] 刘飞禹,陶宇,王军,等.分级真空预压联合电渗和强夯法试验[J].中国公路学报,2020,33(09):168-179.
[8] Leonards G A,Asce W,Holtz R D. Dynamic compaction of granular soils[J]. Journal of the Geotechnical Engineering Division,1980,106(01):35-44.
[9] Menard L,Broise Y. Theoretical and practical aspect of dynamic consolidation[J]. Geotechnique,1975,25(01):3-18.
[10]周健,姚浩,贾敏才.大面积软弱地基浅层处理技术研究[J].岩土力学,2005,10:164-167.
[11]周林禄,苏雷,邱志坚,等.基于OpenSees的砂土本构模型对比研究[J].地震工程学报,2022,44(1):128-135.
[12]程超,钟秀梅,刘钊钊,等.饱和黄土动态液化和静态液化机理的差异性研究[J].地震工程学报,2022,44(1):136-144.
[13]李水江,汤家郗,李校兵,等. 真空预压联合逐级动力压实和电渗法处理疏浚淤泥试验研究[J/OL]. 土木与环境工程学报(中英文),2021:1-8[2022-10-19].http://kns.cnki.net/kcms/detail/50.1218.TU.20211125.1532.004.html.
[14]李晓静,李术才,姚凯,等. 黄泛区路基强夯时超孔隙水压力变化规律试验研究[J]. 岩土力学,2011,32(09):2815-2820.
[15]高有斌,曾国海,徐步兴,等.双控动力固结法加固软粘土地基的应用研究[J]. 防灾减灾工程学报,2009,29 (06):632-637.
[16] Burnotte F,Lefebvre G,Grondin G. A case record of electroosmotic consolidation of soft clay with improved soil-electrode contact[J]. Canadian Geotechical Journal, 2004,41(06):1038-1053.
[17] 刘飞禹,张志鹏,王军,等.分级真空预压联合间歇电渗法加固疏浚淤泥宏微观分析[J].岩石力学与工程学报, 2020,39(09):1893-1901.
[18] Liu C,Shi B,Zhou J,et al. Quantification and characterization of microporosity by image processing, geometric measurement and statistical methods:application on SEM images of clay materials[J]. Applied Clay Science,2011,54(01):97-106.

相似文献/References:

[1]吕文龙,沈仁良,王 凯.孔内深层强夯法施工参数对珠江三角洲地区地基处理效果影响的试验研究[J].华南地震,2023,(02):125.[doi:10.13512/j.hndz.2023.02.14]
 LYU Wenlong,SHEN Renliang,WANG Kai.Experimental Study on the Influence of Construction Parameters of Down-hole Dynamic Compaction on the Foundation Treatment Effect in the Pearl River Delta Region[J].,2023,(03):125.[doi:10.13512/j.hndz.2023.02.14]

备注/Memo

备注/Memo:
收稿日期:2022-05-10
基金项目:国家自然科学
基金项目(51878402)
作者简介:杨展鹏(1975-),男,高级工程师,硕士,主要从事土木工程管理及土木工程施工方面的研究。E-mail:869707926@qq.com
更新日期/Last Update: 2022-09-15