【正文】
( 1)將腳架大概擺放在如圖所示的 A 點(diǎn)位置,只整平不對(duì)中,作為 CPⅢ 平面控制網(wǎng)平面觀測(cè)的第一個(gè)測(cè)站,在第一測(cè)站上只需要觀測(cè) 2 對(duì) CPⅢ 控 制點(diǎn),智能全站儀只需要觀測(cè) CPⅢ 控制點(diǎn)的水平距離、方向。 CPⅢ 控制網(wǎng)的特點(diǎn)主要有以下幾點(diǎn): ( 1)由于高速鐵路線路一般比較長(zhǎng),大多數(shù)線路在幾百公里甚至上千公里,因此 CPⅢ 控制網(wǎng)中控制點(diǎn)的數(shù)量極多,標(biāo)準(zhǔn)的 CPⅢ 網(wǎng)形每公里為 16 對(duì)點(diǎn)。 CPⅢ 控制網(wǎng)的可以用自由測(cè)站邊角交會(huì)法進(jìn)行觀測(cè),同時(shí),利用傳統(tǒng)的三 聯(lián)腳架法也可完成 CPⅢ 控制網(wǎng)的測(cè)量,為了能夠得到精度更高的外業(yè)觀測(cè)數(shù)據(jù),我們需要對(duì)各種方法測(cè)得的 CPⅢ 網(wǎng)外業(yè)數(shù)據(jù)進(jìn)行平差處理,分析用不同方法測(cè)得的CPⅢ 控制網(wǎng)的觀測(cè)數(shù)據(jù)之間的精度差異,進(jìn)而得到最適合 CPⅢ 控制網(wǎng)的觀測(cè)方法;高速鐵路精密工程測(cè)量的目的是為了得到滿足高速鐵路精密工程測(cè)量要求的觀測(cè)數(shù)據(jù)來(lái)指導(dǎo)高速鐵路的施工、運(yùn)營(yíng)、維護(hù)、監(jiān)測(cè)等一系列的工作,因此,我們不僅要進(jìn)行外業(yè)觀測(cè),更重要的是對(duì)觀測(cè)數(shù)據(jù)進(jìn)行平差處理,得到相應(yīng)的點(diǎn)位、距離等一系列的精度指標(biāo),通過(guò)這些精度指標(biāo)來(lái)判斷平差后 CPⅢ 控制點(diǎn)坐標(biāo)值等數(shù)據(jù)是否滿 足高速鐵路建設(shè)、運(yùn)營(yíng)及維護(hù)的精度要求。 CPⅢ 控制網(wǎng)中每隔 60m左右布設(shè)一對(duì) CPⅢ 控制點(diǎn)(縱向間距為 60m,橫向間距約為 11m,車站除外), CPⅢ 控制網(wǎng)應(yīng)附合于 CPⅠ 、 CPⅡ 控制點(diǎn)上,每 600m左右( 400800m)聯(lián)測(cè)一個(gè) CPⅠ 或者 CPⅡ 控制點(diǎn),當(dāng) CPⅡ 控制點(diǎn)的點(diǎn)位密度不能滿足 CPⅢ 控制網(wǎng)的聯(lián)測(cè)要求時(shí),可以按照等精度內(nèi)插的方法來(lái)加密 CPⅡ 控制點(diǎn),以滿足 CPⅢ 控制網(wǎng)的要求。 軌道控制網(wǎng)( CPⅢ ): CPⅢ 控制網(wǎng)的平面網(wǎng)測(cè)量應(yīng)在線下工程 竣工并且通過(guò)沉降變形評(píng)估后施測(cè),平面測(cè)量的方法應(yīng)采用自由測(cè)站邊角交會(huì)法施測(cè),高程測(cè)量的方法可以采用矩形法和德國(guó)法進(jìn)行測(cè)量,這里重點(diǎn)介紹其平面測(cè)量的方法及精度評(píng)定指標(biāo)??蚣芸刂凭W(wǎng)是高速鐵路平面控制測(cè)量的基準(zhǔn)。 關(guān)鍵詞: CPⅢ 控制網(wǎng);外業(yè)測(cè)量;數(shù)據(jù)處理;區(qū)段搭接 本科 畢業(yè)設(shè)計(jì) 第 VIII 頁(yè) Abstract Nowadays, the highspeed railway construction is walking into the stage largescale construction. In the process of highspeed railway construction, precision engineering measurement, as an important technical support, is indispensable in the construction of highspeed railway. We can say that whether the accuracy of precision engineering measurement of highspeed railway can meet the requirements of engineering measurement standard will directly determine the success or failure of the highspeed railway construction. This paper takes the CPⅢ control work’s field measurement, indoor data processing and adjustment data analysis as the main object of the study, to explore the problems in the process of the CPⅢ control work’s field measurement and indoor data processing. The main contents include: Firstly, we carry on a further analysis of CPⅢ control work’s field measurement and then make a detailed explanation of the CPⅢ work’s whole process as well as the problems we should pay attention in the observation process, at the same time, we must take care of the observation precision control. Contrast the advantages and disadvantages of free station observation and triple base and then plement each other, finally obtains the most suitable method for CPⅢ work’s surveying. Secondly, we take a further study of CPⅢ level work’s adjustment principle and then make a detailed explanation of the basic process of the CPⅢ level work’s free work adjustment and constraint work adjustment. Focus on the analysis of the method of rank deficient free work adjustment in the free work adjustment. Using the CPⅢ control work’s data processing software carry out the data obtained by field measurement by adjustment method and then check that whether the CPⅢ control point’s position precision , CPⅢ control point’s relative accuracy can meet the requirements of highspeed railway engineering measurement standard. Explore the relationship between field observation data and indoor adjustment data and then guiding the problems we should pay attention by their internal connection to achieve the purpose of improving the efficiency of CPⅢ control work field surveying. Thirdly, the problem of CPⅢ control work’s segment overlap should be taken 本科 畢業(yè)設(shè)計(jì) 第 IX 頁(yè) further study. Compared the accuracy of segment constraint adjustment and the accuracy of cosine function constraint adjustment and then obtains the most suitable method for CPⅢ control work’s segment overlap. Exploring the question of segment overlap and researching that how to get higher precision by reformatting the conversion scale of the CPⅡ coordinate system and the CPⅢ coordinate system. We also need consider how to improve the precision of horizontalization adjustment. key words: CPⅢ control work。 本科 畢業(yè)設(shè)計(jì) 第 VI 頁(yè) 論文各部分內(nèi)容及時(shí)間分配:(共 16 周) 第一部分: 收集、查閱、學(xué)習(xí)有關(guān)的教材、規(guī)范和參考文獻(xiàn)等資料 ( 3 周) 第二部分: CPⅢ 平面網(wǎng)外業(yè)測(cè)量相關(guān)的實(shí)習(xí) ( 3 周) 第三部分: CPⅢ 控制網(wǎng)專業(yè)數(shù)據(jù)處理 軟件的學(xué)習(xí)和使用 ( 2 周) 第四部分: 相關(guān)的 CPⅢ 平面網(wǎng)外業(yè)測(cè)量實(shí)驗(yàn)與內(nèi)業(yè)計(jì)算分析 ( 3 周) 第五部分: 論文的書(shū)寫(xiě)與修改 ( 3 周) 評(píng)閱及答辯: ( 2 周) 備 注 閱讀相關(guān)的科技文獻(xiàn)不少于 30 篇,書(shū)寫(xiě)和提交相應(yīng)的心得體會(huì)。 通過(guò)這樣的畢業(yè)設(shè)計(jì),可使學(xué)生綜合應(yīng)用大學(xué)所學(xué)的測(cè)量知識(shí),學(xué)習(xí)和掌握高速鐵路精密工程測(cè)量的新知識(shí)和新技術(shù),并能夠勝任高速鐵路 CPⅢ 控制網(wǎng)的外業(yè) 本科 畢業(yè)設(shè)計(jì) 第 V 頁(yè) 測(cè)量和內(nèi)業(yè)數(shù)據(jù)處理工作。畢業(yè)設(shè)計(jì)中,作者進(jìn)行 CPⅢ平面網(wǎng)的外業(yè)觀測(cè)實(shí)驗(yàn),進(jìn) 行了實(shí)測(cè)數(shù)據(jù)的處理和分析,進(jìn)行了平面網(wǎng)區(qū)段間的搭接處理。論文基本 達(dá)到學(xué)術(shù)學(xué)位論文的要求,可以進(jìn)行論文的答辯。學(xué)會(huì)解決 CPⅢ 測(cè)量與數(shù)據(jù)處理過(guò)程中的個(gè)別問(wèn)題。本文以 CPⅢ 控制網(wǎng)的外業(yè)測(cè)量與內(nèi)業(yè)數(shù)據(jù)處理以及平差數(shù)據(jù)分析為主要研究對(duì)象,對(duì) CPⅢ 控制網(wǎng)從外業(yè)測(cè)量到內(nèi)業(yè)數(shù)據(jù)處理的過(guò)程中所遇到的問(wèn)題進(jìn)行探討。 segment overlap 西南交通大學(xué)本科 畢業(yè)設(shè)計(jì) 第Ⅸ頁(yè) 目 錄 第一章 緒論 .................................................................................................................