东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (12): 1778-1781.DOI: -

• 论著 • 上一篇    下一篇

化学腐蚀下岩土体力学特性变化的定量描述

崔强;冯夏庭;程昌炳;杨成祥;   

  1. 东北大学资源与土木工程学院;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-12-15 发布日期:2013-06-22
  • 通讯作者: Cui, Q.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金国际合作重大项目(40172098);;国家自然科学基金资助项目(10472130)

Quantitative study on deterioration of mechanical properties of soilmass under chemical corrosion

Cui, Qiang (1); Feng, Xia-Ting (1); Cheng, Chang-Bing (2); Yang, Cheng-Xiang (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) State Key Lab. of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-12-15 Published:2013-06-22
  • Contact: Cui, Q.
  • About author:-
  • Supported by:
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摘要： 运用化学动力学理论和岩土体微观结构研究相结合的方法定量研究化学腐蚀作用下岩土介质力学特性的劣化行为.通过试验,得出黏土在酸性条件下,其无侧限抗压强度及针铁矿质量分数随腐蚀时间变化的规律.基于量子化学和结构化学理论,通过试验和计算得出红黏土胶结本质及微观结构模型参数,并建立该黏土无侧限抗压强度与针铁矿质量之间的定量关系.对针铁矿在酸性条件下的溶解反应进行化学动力学分析,得出该反应动力学各主要参数.结合红黏土微观研究结果,建立了岩土体无侧限抗压强度随时间变化的数学模型.编制程序,对贵州红黏土在酸液腐蚀作用下,其无侧限抗压强度随时间动态变化过程进行计算.结果表明,与试验规律吻合较好.

关键词: 化学腐蚀, 红黏土, 针铁矿, 化学动力学, 氢键, 无侧限抗压强度

Abstract: A new quantitative method is presented to describe the deterioration of mechanical properties of soilmass under chemical corrosion. The aim is to analyze the chemical corrosion effect on the environment medium on the basis of chemical kinetics in combination with the microstructrual study on soilmass. Leaching tests were conducted and a conclusion was drawn that the change of unconfined compressive strength of clay taken from Guizhou is relevant to the goethite content of clay. Based on the analyses of electrical, magnetic and quantum chemical properties of minerals of clay, the type and numbers of cementation bonds between kaolin and goethite were determined. Analyzing kinetically of the chemical reaction between goethite and hydrochloride, the primary parameters, such as kinetic reaction rate order were obtained. Then, a mathematic model was developed to describe the time-dependent unconfined compressive strength of clay under chemical corrosion. And the numerical simulation results indicated that with the increasing corrosion time, the unconfined compressive strength of clay decreases then become stable finally.

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