Research On Optimal Design Of Cross Node In Urban Ultility Tunnel Based On BIM

The emergence of BIM(Building Information Model)technology is the second technological change after CAD technology.Today,engineers in the construction industry are using BIM technology to greatly improve the quality and efficiency of Engineering design.The underground comprehensive pipeline corridor is the hot spot of infrastructure construction in our country at present,and it is a sign that the urban underground infrastructure construction has entered the stage of high quality development.In this context,this paper proposes a BIM-based optimization design model for the intersection joints of underground pipeline galleries.On the basis of consulting a large number of relevant research literature and engineering application cases,this paper expounds the relevant theory of BIM technology,and analyzes the adaptability of introducing BIM technology into underground integrated pipe gallery.Taking the crossing node of the corridor as the research object,this paper analyzes the specific characteristics of eight types of pipelines and the adaptability of various pipelines to the corridor,studies the complex relationship between the streamline of various pipelines and the streamline of the pedestrian passage in the corridor,puts forward the solution of the conflict points of streamline,and summarizes the design methods and principles of the crossing node of the corridor.This paper compares and analyzes the difference between traditional CAD technology and BIM-based design,and obtains the comparative advantage of BIM technology in the design process of pipeline corridor intersection node,and carries out collision detection on BIM model.At the same time,based on the BIM technology,the optimum design criteria of the pipe gallery cross-joint are discussed,and six indexes affecting the optimum design results of the pipe gallery cross-joint are obtained.On this basis,a feasible evaluation system for optimum design of pipeline corridor intersection joints is proposed,and the evaluation criteria for optimum design scheme are verified by an engineering example,which proves the feasibility of the optimization design system.