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测定列车通过时桥梁墩台的振动和沉降并与标准值比较,用以判定铁路桥梁下部工程的稳定性,是广泛使用的方法。本中心“自1972年实施以来,对于振动程度是否影响沉降测定一向存在疑问.振动、沉降的测定方法,本中心是按照1965年发表的“关于以振动分析桥梁下部结构指南的研究报告”和1974年发表的“关于土木结构修改标准的研究报告”中所规定的标准进行的。对于沉降试验,当初,指南规定用目测千分表的方法,为了提高效率,1975年开始,改为使用千分表型变位变换器集中记录的方法。使用这种方法,由于可以把振动波形和沉降波形同时记录在一张记录纸上,对于解决前述振动对沉降量是否有影响的问题,应该是很有利的,观察使用结果,可说不负所望,现报告其概要。
It is a widely used method to determine the stability of the lower part of the railway bridge by measuring the vibration and settlement of bridge piers and abutments when passing the train and comparing with the standard values. The Center has always been in doubt as to whether the degree of vibration affects the subsidence determination since its implementation in 1972. The method for determining the vibration and settlement is based on the Research Report on Vibration Analysis of Substructure of Bridges published in 1965 and 1974 Year published “on the civil structure of the revised standard research report.” For the subsidence test, originally, the guidelines require the use of visual indicators, in order to improve efficiency, starting in 1975, the use of thousands of points In this method, since the vibration waveform and the subsidence waveform can be simultaneously recorded on one piece of recording paper, it is advantageous to solve the problem of whether the aforementioned vibration has an influence on the amount of subsidence The results of the observation can be taken as expected, the summary of which is reported now.