With the improvement of urban economic and modernization levels,traffic pressure is increasing.The subway has become an im-portant means to relieve urban traffic pressure.With the development of the rail transit network,the construction near the subway will cause certain deformation disturbances to the existing subway structure.Therefore,it is necessary to carry out automatic monitoring of the subway structure disturbed by construction.In subway automatic monitoring projects,a single measuring station network cannot meet the project re-quirements of a wide monitoring range.It is necessary to conduct series observations of multiple measuring stations to construct a reference network.For this reason,the networking method based on free station setting and side-angle intersection commonly used in automatic mo-nitoring projects and its deficiencies are analyzed.A multi-station networking method based on additional opposite observation constraints is proposed.Taking a local protection monitoring project of Fuzhou Metro Line 5 as an example,the accuracy reliability and network ro-bustness of this reference network construction method are verified.
关键词
基准网/多测站/自由设站/自动化监测
Key words
Reference network/Multi-station/Free station method/Automatic monitoring
维普
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