项目名称: 氮磷化合物对黏性土力学性能影响的试验研究
项目编号: No.51309114
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 水利工程
项目作者: 伍艳
作者单位: 黄河水利委员会黄河水利科学研究院
项目金额: 25万元
中文摘要: 自然界的土体是由固相、液相和气相组成的三相分散体系,土的性质很大程度上取决于三相物质之间的相互作用,日益严重的环境污染使这种相互作用变得复杂。研究表明,环境-土化学作用,特别是水-土化学作用不仅存在,且具有显著的力学效应,但目前该领域的研究仍主要集中在无机污染物对土体性能的影响。随着水质成分的日趋复杂,氮磷化合物污染越来越严重,其对土体物理力学性能的影响不容忽视。本项目拟通过室内三轴剪切试验,研究黏性土在不同浓度氮磷化合物溶液中浸泡后于不同围压下的变形特性,总结提炼氮磷化合物对黏性土强度与变形特性的影响规律,在此基础上建立氮磷化合物浓度与黏性土力学性能指标的关系曲线及数学模型,并通过对黏性土与氮磷化合物作用前后矿物成分、化学成分及微观形貌分析,初步揭示氮磷化合物与黏性土相互作用的机理,为岩土工程安全评价及病害防治提供基础数据与理论支持。
中文关键词: 黏性土;氮磷化合物;物理力学性能;机理分析;曲线拟合
英文摘要: Soil is a disperse system composed of solid phase, liquid phase and gaserous phase, the interaction of these phases is becoming complex because of the serious environment pollution problems. It is reported that the chemical action between soil and environment, especially between soil and water, has obvious mechanical effect on soil, but most are about inorganic contamination so far. Since the nitrogen and phosphorus pollution is getting worse, the effect of them on soil mechanical property should be valued. In this project, the deformation characteristics of cohesive soil soaked in nitrogen and phosphorus solution with various concentrations will be studied under different confining pressures, curves and mathematical models will be set up based on it. Interaction mechanisms of cohesive soil with nitrogen and phosphorus will be revealed by mineral, chemical and microscopic analysis finally. The result will provide basic data and theoretical support for the assessment of security and prevention countermeasure of geotechnical engineering.
英文关键词: cohesive soil;nitrogen and phosphorus;physico-mechanical performance;mechanism;curve fitting