基于结构力学求解器的地下综合管廊节点理论分析和数值模拟

打开文本图片集

中图分类号：TU311.1 文献标志码：A DOI： 10.15935/j.cnki.jggcs.202503.0019

AbstractIn the design and construction processof underground utility tunnel，nodes are key parts of the utility tunnel structure.This article takes thesection of an underground utility tunnel in Zhengzhou as the research object，and uses theoretical analysis and numerical simulation methods to explore the stress and deformation of each node in the underground utility tunnel.Firstly，the interval is simplified into athree span asymmetric frame structure.Based on the structural mechanics solver，the load calculation of the utility tunnel nodes is carred out to obtain their bending moment，shear force，and axial force diagram.Then，Flac3D software isused to numerically simulate andanalyze the stress state of the underground utility tunnel.The research results show that the theoretical calculation results are basically consistent with the numerical simulation results，and the lateral soil pressure based on Rankine'sactive soil pressure is smaller than the numerical simulation results.It is recommended to use static soil pressure for internal force and deformation analysis of underground utility tunnel; When a three span asymmetric frame is subjected to soil self weight and lateral soil pressure，the bending moments it experiences are roughly symmetrically distributed，and the maximum bending moment on both sides of the roof increases with the span.

KeyWordsunderground utility tunnel， theoretical analysis，Flac3D，structural mechanics solver

0 引言

地下综合管廊作为一种现代城市基础设施，用于供水、排水、电力、通信等，为城市的可持续发展提供了重要的支持[]。（剩余10618字）