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地下结构工程是岩土工程隧道与地下工程方向研究生的专业必修课程,课程中涉及到一类新建地铁结构施工对周边环境影响的问题,主要包括新建地铁结构近距离穿越既有地铁结构、城市道路、桥梁基础、地面建筑基础、高速铁路等,问题涉及到新旧结构与土的相互作用问题,相互作用机理非常复杂,其核心目标是如何将新建地铁施工引起的既有结构的附加变形控制在安全的范围之内,从而降低施工安全风险。为了帮助学生理解问题,尽快掌握地下结构分析中重要的方法即地层-结构模型,本文以FLAC3D软件为例,将数值模拟方法引入到地下结构课程教学中,有助于启发学生的主动思维,提高课堂教学质量与效果,使学生尽快掌握数值模拟方法解决地铁穿越问题基本流程与思路。
Underground structure engineering is a required course for postgraduates in geotechnical engineering tunnels and underground engineering. The curriculum involves the problems of the construction of a new type of subway structure on the surrounding environment, mainly including the construction of new subway structures that crosses existing subway structures and urban roads at short distances. , bridge foundations, ground building foundations, high-speed railways, etc. The problem involves the interaction between old and new structures and soil, and the interaction mechanism is very complex. The core goal is how to control the additional deformation of existing structures caused by the construction of new subways in safety. Within the range, thereby reducing construction safety risks. In order to help students understand problems and grasp the important method of underground structure analysis, that is, stratum-structure model as soon as possible, this paper uses FLAC3D software as an example to introduce numerical simulation methods into the teaching of underground structure to help inspire students’ active thinking and improve The quality and effect of classroom teaching enable students to master the basic flow and ideas of the numerical simulation method to solve the subway crossing problem as soon as possible.