纳米电化学技术用于软土加固的机理研究

项目名称： 纳米电化学技术用于软土加固的机理研究

项目编号： No.51278390

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 石鲜明

作者单位： 武汉轻工大学

项目金额： 80万元

中文摘要： 软土地基加固处理对建筑、铁路、机场、道桥、边坡等施工建设有重要意义，因此是岩土工程研究的最为关注的问题之一。在过去十年电化学技术于岩土工程的研究和应用均取得了良好的发展。纳米科技近年来在土木工程中也取得了迅猛发展，特别是外加电场驱动纳米颗粒修复混凝土的报道对于岩土工程很有启发意义。纳米科技在软土地基电化学加固中的研究尚未见报道。本研究在我们现有的纳米改性混凝土、电化学修复混凝土、多孔介质中离子运输有限元模拟等工作基础上，选择若干种化学物质和纳米材料，通过外加电场注入到多种典型软土中，经过与土壤胶体的相互作用和电化学反应，实现土壤中水分的排出、土壤孔隙的填充以及土壤化学成分和微观结构的优化。该应用基础研究将多种化学和电化学表征手段与常规岩土材料测试方法相结合，将实验与有限元相结合，探索电化学方法加固软土的机理，提供低成本、无毒、高效的软土加固技术，为科技进步和国民经济发展做出一定贡献。

中文关键词： 纳米颗粒；电渗；加固；软土；软弱土

英文摘要： The consolidation/stabilization of soft soil foundation is of great importance to the construction of buildings, railroads, airports, roads, bridges, slopes, etc. As such, it has been one of the issues given due attention in geotechnical engineering. The last decade has seen good advances in the use of electrochemical techniques for the research and application of geotechnical engineering. Recent years have also seen rapid development of nanotechnology in civil engineering, among which the report of using electrically-driven nanoparticles to rehabilitate concrete features practical enlightenment significance. The use of nanotechnology in the electrochemical treatment of soft soil foundation or weak soils has not been reported. As such, on the basis of our existing work in nano-modified concrete, electrochemical rehabilitation of concrete, FEM modeling of ionic transport in porous media, etc., this study will identify/select a few types of chemicals and nanomaterials and electrially inject them into a few selected typical soft soils. Through their interactions with soil gels and electrochemical reactions, this will lead to the extraction of moisture in soil, the filling of pores in soil, and the optimization of soil chemistry and microstructure. This applied fundamental study will combine multiple chemical and el

英文关键词： Nanoparticle；Electroosmosis；Reinforcement；Soft soil；Weak soil