RESEARCH ON SECTION FITTING OF UNDERGROUND CHANNEL UNDER NORMAL AND SPECIAL CONDITIONS OF URBAN RAIL TRANSIT
In the current urban rail transit,it is difficult to fit the sections of underground channels under normal and special conditions based on standard channel sections.Through consulting and analysis of available data,a solution is proposed systematically for underground sections under normal and special conditions of urban rail transit,with specific geometric relationships and dimensional calculations of underground sections.In addition,design cases of active and passive avoidance type underground channel sections(typical special underground sections)are analyzed.Results show that a precise fitting process is indicated for underground channel sections in the aforesaid solution.After fitting,sections are connected smoothly,with less stress mutation,so structures are stressed reasonably.This is also a flexible solution to section design problems under special conditions and design basis for similar projects.