岩土工程施工力学问题数值模拟方法探讨

Discussions about problems of Construction Mechanics in Geotechnical Engineering and Its Numerical Simulation Approaches

针对岩土工程安全性的另一类问题———工程施工扰动因素的分析 ,深入地探讨了工程施工力学的概念、性质和任务 ,并结合典型的土方工程 ,给出了岩土工程施工力学问题有限元数值模拟途径的若干细节 ,包括体系网格离散的特点、“无应力面”的模拟、应力释放荷载的计算 ,以及整体施工工步计算之间的衔接等 .特别指出了施工力学问题数值分析的关键 ,是将若干步孤立的力学分析 ,按照施工时序依次连接起来而构成一个完整的解答 .

The paper has primarily studied the construction mechanics with regard to another safety analysis of civil and geotechnical engineering practices,and for the first time systematicaly sumarized the concepts and characteristics of this mechanical subdivision.In the light of the above ideas and combining with the concrete constructional process of the typical engineering project, a set of numerical simulation schemes for dynamically tracing the procedures of the engineering construction have been drafted,which include FEM meshing,stressless surface modeling,initial stress releasing load and the inheritance algorithms through every computational phases corresponding to each procedures.The viewpoints in this paper are referential to the civil and geotechnical engineering practices and similar studies of other colleagues.