可液化地基电解减饱法处理的电学特性分析

何森凯; 陈育民; 方志

doi:10.11779/CJGE201608010

可液化地基电解减饱法处理的电学特性分析 English Version

何森凯^{1, 2},
陈育民^{1, 2},
方志^{1, 2}

1 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210098; 2 河海大学土木与交通学院,江苏南京 210098

基金项目: 国家自然科学基金面上项目（51379067）; 重点国际合作研

详细信息

作者简介:
何森凯(1990- ),男,主要从事土动力学与土工抗震方面的研究。E-mail: 616478470@qq.com。

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- 文章访问数: 414
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- PDF下载量: 344
出版历程
- 收稿日期: 2015-08-06
- 发布日期: 2016-08-24

Electrical characteristics of electrolytic desaturation method for liquefiable foundation

HE Sen-kai^{1, 2},
CHEN Yu-min^{1, 2},
FANG Zhi^{1, 2}

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China

摘要

摘要: 电解减饱和法是近年来提出的一种处理可液化地基的新方法,通过电解饱和砂土地基中的孔隙水生成气体,达到减小砂土地基饱和度并提高抗液化强度的目的。采用可导电的塑料排水板（EKG）为电极,开展饱和砂土地基在恒定电流下的电解减饱和模型试验,并分析了砂土地基在电解过程中的电学特性。试验结果表明,电解初期饱和度的下降速率与电流强度呈正比;然后饱和度的下降速率变缓;最后饱和度减小到89.5%不再变化,且最终饱和度的大小与电流强度无关。此外,地基的等效电阻随着砂土饱和度的减小而增大,并且对比了孔隙水压力系数B、含气水体积模量K_wa、压缩波速v_p和地基等效电阻等4种评价指标在分析饱和砂土减饱和试验中的适用性,结果表明等效电阻在电解减饱和法中最易测得,且对砂土饱和度的敏感范围更大以及适用于各类试验,因此可将地基等效电阻作为评价砂土减饱和状态的有效指标。
- 减饱和法 /
- 电解 /
- 饱和砂土地基 /
- 电流强度 /
- 地基等效电阻
Abstract: The electrolytic desaturation method is an innovative method for mitigation of soil liquefaction in recent years. In this method, the air bubbles produced by electrolysis in the pore water of the saturated sandy foundation can reduce the saturation degree of the soil, and improve liquefaction resistance. In this study, the desaturation model tests on sand foundation under constant current intensity are carried out by using the conductive plastic drainage plates as the electrodes. Besides, the electrical properties of the sand foundation in the process of electrolysis are analyzed. The results show that at the initial stage of electrolytic desaturation process, the decreasing rate of saturation increases linearly with the currency intensity, then the saturation continues to decrease in a gradual decrease rate, and finally the saturation reduces to 89.5%, which is independent of the current intensity. In addition, the equivalent electrical resistance of the foundation increases with the decrease of the saturation of sand. Meanwhile, four kinds of indices including the pore water pressure coefficient B, the gas bearing water bulk modulus K_wa, the compression wave velocity v_p and equivalent electric resistance of foundation are also evaluated here for analyzing the state of desaturation of sand foundation. The results show that the equivalent electric resistance is most easily measured, and has the largest sensitive range of sand saturation. Therefore, the equivalent electric resistance of foundation can be adopted as an effective index to evaluate the state of desaturation of sand foundation.
- desaturation method /
- electrolysis /
- saturated sand foundation /
- current intensity /
- equivalent electric resistance of foundation

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参考文献(26)

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文章访问数: 414
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可液化地基电解减饱法处理的电学特性分析 English Version

作者简介: 何森凯(1990- ),男,主要从事土动力学与土工抗震方面的研究。E-mail: 616478470@qq.com。

计量

出版历程

Electrical characteristics of electrolytic desaturation method for liquefiable foundation

计量

出版历程

目录

作者简介:
何森凯(1990- ),男,主要从事土动力学与土工抗震方面的研究。E-mail: 616478470@qq.com。