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本文首先讨论了能源开发建设所面临的工程问题和科学问题,简述了工程地质体力学的内涵和应解决的核心问题.特别介绍了笔者研究团队最近几年的研究成果,提出了相关科学问题的研究方向.主要内容包括:传统固体力学中关于点破坏的概念,研究地质体有很大的局限性,论述了用破坏程度描述地质体破坏状态的合理性,以及基于监测与数值模拟相结合的破坏状态概念—破裂度;基于破裂演化原理,讨论了工程地质灾害的两个防灾理念,强调了状态判断的合理性及数值模拟方法的重要性;讨论了地质体稳定性分析方法的评价标准,并对目前常见的几种评价方法做了简要的评述;提出了数值模拟地质体的非连续、非均匀性的两尺度力学模型和计算框架;论述了代表性体积单元尺度上的应变强度分布函数,该函数比本构关系表征材料的破坏特性更为合适;综述了地质体孔隙裂隙渗流及与破裂场耦合模型的计算模型;结合汶川地震次生地质灾害的现象,指出了拟静力计算方法的不合理性,介绍了关于地震作用下地质体边坡稳定性的数值模拟新方法.
This paper first discusses the engineering problems and the scientific problems facing the energy development and construction, and briefly describes the connotation of the engineering geophysics and the core problems that should be solved .In particular, I introduced the research results of the research team in recent years and put forward the relevant scientific issues The main contents include: the concept of point destruction in traditional solid mechanics, the limitation of studying the geological body, the rationality of describing the destruction state of the geological body by the degree of destruction, and the combination of monitoring and numerical simulation Based on the theory of rupture evolution, this paper discusses two disaster prevention concepts of engineering geological hazards, emphasizes the rationality of state judgments and the importance of numerical simulation methods. It also discusses the evaluation of methods of stability analysis of geological bodies Standard, and gives a brief review of several common evaluation methods. A two-scale mechanical model and a calculation framework for numerical simulation of non-continuous and non-uniform geological bodies are proposed. The effects of strain intensity Distribution function that is more suitable than the constitutive relation to characterize the destructive properties of the material; reviews the geological body pores Fracture seepage and the coupling model with the rupture field; combined with the phenomenon of secondary geological disasters in the Wenchuan earthquake, pointed out the unreasonableness of the quasi-static calculation method, and introduced the numerical simulation of the stability of the geological body’s slope under the earthquake method.