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我国大江大河上已建成許多座长大桥梁,在运营中及时准确地掌握墩台有无下沉位移及其变化規律是桥梁养护的一项重要工作。本文介紹武汉长江大桥在总結多年观测工作的基础上,采用强制归心装置。除用常規测量方法外,对正桥墩台高程采用自由网拟稳平差法,横向位移采用测小角法,墩間距离采用电磁波距法等,利用这些新的观测方法提高了工作效率和观测精度,可供各大桥养护工作者参考。
Many large bridges have been built on the great rivers of our country. It is an important work of bridge maintenance that timely and accurately grasping the settlement and displacement of pier abutments in operation and in time and accurately. This article introduces the Wuhan Yangtze River Bridge, based on the summary of many years of observation work, adopts forced attachment device. In addition to the conventional measurement methods, the free-web quasi-steady-state adjustment method is adopted for the elevation of abutment piers, the small-angle method for lateral displacement and the electromagnetic wave distance method for the distance between pier and so on. These new observation methods are used to improve work efficiency and observation accuracy , For the bridge maintenance workers for reference.