酸性溶液环境下红层软岩崩解特性及损伤破坏机制研究

项目名称： 酸性溶液环境下红层软岩崩解特性及损伤破坏机制研究

项目编号： No.41502262

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 地质学

项目作者： 张磊

作者单位： 广东石油化工学院

项目金额： 19万元

中文摘要： 本课题以华南地区常见的红层软岩为研究对象，结合华南地区多酸雨的现状，开展红层软岩在酸性溶液环境下崩解过程及其损伤破坏特性试验研究工作。首先，调研华南地区常见的酸雨类型及其化学成分；在此基础上，设计开展软岩在酸性溶液环境下的崩解试验，探索酸性溶液环境下软岩崩解过程的特点，并利用电子显微镜观察崩解过程中软岩微观结构特点；其次，利用分形理论分析软岩在酸性溶液环境下崩解过程的分形特征，并对崩解过程中浸岩溶液的离子浓度变化规律进行跟踪； 然后，利用数字图像测量技术和万能试验机等试验手段，开展应力-酸性溶液环境下软岩损伤破坏试验，以研究软岩在酸性溶液环境下的材料性能劣化特性，损伤破坏机制以及损伤裂纹发展过程及机制；接下来，利用PFC颗粒流软件，反演软岩损伤破坏试验结果，得到颗粒流模型微观参数，并模拟崩解试验结果；最后，根据工程现场水样成分，调整PFC模型参数，模拟工程实况，为工程建设提供参考和建议。

中文关键词： 红层软岩；崩解；损伤破坏；微观机制；颗粒流

英文摘要： Under the actions of acid rain in southern China, the red-bed soft rock are subject to disintegrate，so we will study on the slaking Characteristics and damage failure process of red-bed soft rock in this region. Firstly, the type and chemical composition of acid rain will be investigated. Based on the result of the investigation, acid solution will be prepared. Then, slaking test of red-bed soft rock in prepared acid solution will be conducted, and the slaking characteristics of red-bed soft rock in acid solution are going to be researched. In addition, microstructure characteristics of disintegrated soft rock will be observed using EMS (electron microscope). Secondly, based on fractal theories，fractal feature in the slaking process of red-bed soft rock are going to studied and ion concentration analysis are used to study the acid solution for the slaking test of red-bed soft rock. Further more, degradation of material properties, damage mechanism and damage cracks are also target. The damage test of red-bed soft rock in acid solution will be conducted, using high-speed cameras and universal testing machine. Next, we will simulate the slaking process of red-bed soft rock in acid solution using PFC software and define the connection among the particles. Finally, compared analysis of water samples on site and in laboratory to adjust parameters of the PFC Model for simulating the real construction, we can provide the suggestions according to the result of the simulation.

英文关键词： red-bed soft rock;slaking;damage failure;microscopic mechanisms;PFC(Particle Flow Code)