基于块体模型细胞自动机的节理岩质边坡稳定性和演化机理研究

The existence of complex joints and fractures in rock makes the rock slope stability and its evolution a long-term difficulty of civil engineering and a bottleneck in corresponding design. For a long time, the development and application of the block model analysis method(discrete element, etc.), which is suitable for the analysis of jointed rock, are both restricted by block model theoretical system and the influence of the traditional solving ideas. So far, the block model method is still difficult to be more effective in analysis and play its proper role, and rarely mentioned in the engineering specifications. The long-term existence of this situation is a great regret. .According to the current situation of subject and the characteristic of this research object, block model method will be adopted in this project. Based on interdisciplinarity, cellular automata method, which has significant advantages on simulation of complex system behaviors, is combined with block model method. A targeted and characteristic new analysis theory and its method are established for complex jointed rock slope analysis. The new analysis system, block model of cellular automata, will inherit the inherent advantages of the block model method for analysis jointed rock, and also have the advantages of cellular automata for analysis of complex system. Block neighborhood update rule, overlapping boundaries subdomain parallel computing method and the cellular automata internal split update rule will be innovatively proposed in this study, promoting the development of relevant subjects. This study is expected to be a breakthrough for the problem of jointed rock slope analysis, and will greatly improve the theory of rock slope analysis and the standard of rock mass engineering design with great significance.

由于存在复杂节理裂隙，节理岩质边坡的稳定性和演化问题是长期困扰土木工程界的学科难题和设计瓶颈。长期以来，适合节理岩体分析的块体模型（如离散元等）分析方法的发展和应用受到自身理论体系的制约和传统求解思路的影响，迄今仍难以比较有效发挥其应有作用，且鲜有在工程规范中被采用，这一局面的长期存在实为一遗憾。针对学科现状和问题特点，本项目拟将块体模型方法，通过学科交叉，结合对模拟复杂系统行为具有显著优势的细胞自动机方法，建立对复杂节理岩质边坡分析有针对性和特色的分析新理论和方法。所建立的块体模型细胞自动机分析系统，即传承了块体模型方法分析节理岩体的固有优点，也具有细胞自动机分析复杂系统的优势。并创新性提出块体邻域更新规则、重叠边界子域并行计算和细胞元胞内部分裂更新规则等，推动相关学科发展。本项目的执行，对节理岩质边坡问题分析是一次突破，对于完善节理岩质边坡分析理论和提高岩体工程设计水平均具有重要意义。

边坡稳定性和演化问题是长期困扰土木工程界的学科难题和设计瓶颈。针对学科现状和问题特点，本项目将块体模型方法，通过学科交叉，结合对模拟复杂系统行为具有显著优势的细胞自动机方法，对边坡理论进行了深入的研究。建立了块体模型细胞自动机分析系统，解决复杂边坡系统的稳定性和演化；对边坡的不同演化和破坏形式，针对性的提出了牵引式和推移式滑坡的分析方法，使边坡分析更加与实际相符；针对不同滑体区域的强度差异，提出了分区计算模型，突破了整体分析的局限；针对边坡的渐进演化，研究并提出了多米诺骨牌模型这一全新的分析方法，成功突破传统方法的很多局限，如安全系数的整体问题，边坡的渐进演化分析问题，边坡稳定性的局部稳定问题；针对现有边坡分析理论的在简化理论上的不足，提出了针对性的解决方案，即块体传递最大滑坡推力的分析方法，该方法实现了更小的安全系数求解和更大的滑坡推力求解，比较以往理论，更利于边坡的安全治理，并符合结构设计的极限状态原则。本项目围绕研究内容，展开了一系列深入研究，为边坡稳定性和演化的理论与实践做出了有意义的工作。