本文選題：變形監(jiān)測(cè) + 數(shù)據(jù)處理　； 參考：《長(zhǎng)沙理工大學(xué)》2014年碩士論文

【摘要】：二郎河特大橋位于貴州省習(xí)水縣境內(nèi)的仁赤高速公路上,是一座比較典型的超高橋墩剛構(gòu)橋梁,大橋全長(zhǎng)701.08m,橫跨峽谷,兩個(gè)主橋墩高均超過(guò)166m。施工和運(yùn)營(yíng)階段,橋墩及懸臂在風(fēng)力、日照、施工和車載等因素影響下會(huì)產(chǎn)生一定程度的變形,需通過(guò)變形監(jiān)測(cè)手段掌握和控制其變形量和變形趨勢(shì)。本論文以二郎河特大橋?yàn)楸尘?進(jìn)行了以下研究：1.探討了測(cè)量機(jī)器人變形監(jiān)測(cè)系統(tǒng)的組成,分析了其監(jiān)測(cè)誤差的主要來(lái)源及影響,設(shè)計(jì)出符合大橋施工特點(diǎn)的監(jiān)測(cè)方案。2.通過(guò)全天候觀測(cè)數(shù)據(jù),分析了參考點(diǎn)方位角測(cè)值偏差的變化規(guī)律及其影響因素,運(yùn)用角度差分的方法進(jìn)行了方位角的改正；基于全站儀測(cè)距原理,分析了氣象條件變化對(duì)測(cè)距的影響,研究了一種應(yīng)用測(cè)量機(jī)器人監(jiān)測(cè)數(shù)據(jù)反演局部區(qū)域大氣折射率變化的方法,并進(jìn)行了距離的改正。3.結(jié)合實(shí)際施工進(jìn)展情況,分析了變形量和變形趨勢(shì)。4.研究了小波分析方法及其在變形監(jiān)測(cè)數(shù)據(jù)處理中的應(yīng)用,利用小波包算法可實(shí)現(xiàn)信噪分離的功能,實(shí)現(xiàn)了監(jiān)測(cè)數(shù)據(jù)的消噪和消噪后的效果分析。研究表明,在應(yīng)用測(cè)量機(jī)器人進(jìn)行全天候監(jiān)測(cè)中,受到氣象條件等因素的影響,儀器的初始定向方位會(huì)發(fā)生偏移變化,使監(jiān)測(cè)數(shù)據(jù)中包含系統(tǒng)性的定向偏差。該偏差為一變量,且與溫度密切相關(guān),表現(xiàn)為周日視變化規(guī)律。主要研究成果為：(1)利用參考點(diǎn)進(jìn)行方位角差分的方法,可以有效削弱定向偏差的影響；(2)通過(guò)測(cè)站與已知參考點(diǎn)間距離觀測(cè)值的變化,求得大氣折射率的近似值及其變化,可以用于監(jiān)測(cè)點(diǎn)距離觀測(cè)值的氣象改正；(3)應(yīng)用小波包算法可以有效實(shí)現(xiàn)對(duì)監(jiān)測(cè)數(shù)據(jù)的消噪。
[Abstract]:Erlang River Bridge, located on Renchi Expressway in Xishui County, Guizhou Province, is a typical super-high pier rigid frame bridge. The bridge is 701.08m in length and spans the canyon. The height of the two main piers is more than 166m. In the stage of construction and operation, the bridge pier and cantilever will produce certain degree of deformation under the influence of wind, sunshine, construction and vehicle, etc. It is necessary to master and control the deformation amount and deformation trend by means of deformation monitoring. This thesis takes the Erlang River Bridge as the background, carries on the following research: 1. This paper discusses the composition of the deformation monitoring system of measuring robot, analyzes the main sources and effects of its monitoring error, and designs a monitoring scheme .2which accords with the construction characteristics of the bridge. Based on the all-weather observation data, the variation law of azimuth deviation of reference point and its influencing factors are analyzed, and the azimuth correction is carried out by using the method of angle difference. In this paper, the influence of meteorological conditions on ranging is analyzed, and a method of retrieving local atmospheric refractive index changes from monitoring data of measuring robot is studied, and the range correction is carried out. Combined with the progress of actual construction, the deformation amount and trend are analyzed. The wavelet analysis method and its application in deformation monitoring data processing are studied. Wavelet packet algorithm is used to realize the function of separation of signal and noise, and the de-noising of monitoring data and the effect analysis after de-noising are realized. The results show that the initial orientation of the instrument will change due to the influence of meteorological conditions in the all-weather monitoring using the measuring robot, which makes the monitoring data contain systematic orientation deviation. The deviation is a variable and closely related to temperature. The main research results are as follows: (1) by using the method of azimuth difference of reference points, the influence of directional deviation can be effectively weakened. (2) the approximate values of atmospheric refractive index and their variations can be obtained by changing the observed values of the distance between the station and the known reference points. It can be applied to the meteorological correction of the observation value of the distance between the monitoring points. (3) the wavelet packet algorithm can effectively realize the de-noising of the monitoring data.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U446

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 高淑照;灰色系統(tǒng)理論及在混凝土橋梁施工撓度變形監(jiān)測(cè)中的應(yīng)用[D];西南交通大學(xué);2002年

，

本文編號(hào)：2012051