本文選題：橋梁災(zāi)害 + 熵理論��； 參考：《長(zhǎng)安大學(xué)》2015年碩士論文

【摘要】：隨著現(xiàn)代化建設(shè)的飛速發(fā)展,我國(guó)橋梁建設(shè)得到了前所未有的發(fā)展契機(jī)�，F(xiàn)階段的西北山區(qū)橋梁,往往重視施工階段的安全性和經(jīng)濟(jì)性,而橋梁在運(yùn)營(yíng)期間所出現(xiàn)的各種問題并沒有得到應(yīng)有的關(guān)注。黃土溝壑地形橋梁下部結(jié)構(gòu)在運(yùn)營(yíng)期間所暴露出的各種問題,如樁基外露、樁周土體塌陷和流失,橋面集中排水和降雨對(duì)樁基造成的沖刷,橋臺(tái)搭板掏空、錐坡沉陷等問題,由于山區(qū)橋梁運(yùn)營(yíng)期間所出現(xiàn)的災(zāi)害沒有得到有效的關(guān)注和解決,橋梁在出現(xiàn)運(yùn)營(yíng)安全風(fēng)險(xiǎn)后,往往會(huì)造成巨大金額的維護(hù)費(fèi)用。論文在借鑒國(guó)內(nèi)外研究成果的基礎(chǔ)上,對(duì)西北黃土地區(qū)橋梁下部結(jié)構(gòu)進(jìn)行廣泛的調(diào)研,并借助于熵理論對(duì)建設(shè)在黃土溝壑地形橋梁下部結(jié)構(gòu)的風(fēng)險(xiǎn)進(jìn)行風(fēng)險(xiǎn)演變規(guī)律分析,在此基礎(chǔ)上作出管理方法的探討。論文主要研究?jī)?nèi)容如下:首先,對(duì)西北黃土溝壑地形梁橋下部結(jié)構(gòu)運(yùn)營(yíng)期間出現(xiàn)的各種災(zāi)害進(jìn)行廣泛的調(diào)研,對(duì)常見病害做系統(tǒng)的歸類,然后深入分析了病害的成因和災(zāi)害的特點(diǎn),在此基礎(chǔ)上建立起黃土溝壑地形橋梁下部結(jié)構(gòu)運(yùn)營(yíng)期間的風(fēng)險(xiǎn)系統(tǒng),并對(duì)風(fēng)險(xiǎn)系統(tǒng)的特征和動(dòng)力機(jī)制進(jìn)行分析。其次,在病害調(diào)研和風(fēng)險(xiǎn)系統(tǒng)特征和動(dòng)力機(jī)制分析的基礎(chǔ)上運(yùn)用熵理論建立黃土溝壑地形橋梁下部結(jié)構(gòu)運(yùn)營(yíng)期間的風(fēng)險(xiǎn)演變規(guī)律研究方法。最后,在風(fēng)險(xiǎn)演變規(guī)律研究的基礎(chǔ)上,提出適應(yīng)于黃土溝壑地形橋梁下部結(jié)構(gòu)多層次的防護(hù)策略,提高橋梁的安全性能及運(yùn)營(yíng)水平。開展黃土溝壑地形橋梁下部結(jié)構(gòu)運(yùn)營(yíng)期間風(fēng)險(xiǎn)演變規(guī)律與防護(hù)管理的研究是十分必要的,論文的研究成果將對(duì)我國(guó)西北地區(qū)山區(qū)現(xiàn)有高速公路典型混凝土橋梁的安全運(yùn)營(yíng)與管理具有重要的指導(dǎo)意義,同時(shí)對(duì)未來(lái)山區(qū)高速公路橋梁的規(guī)劃設(shè)計(jì)具有借鑒與指導(dǎo)作用。
[Abstract]:With the rapid development of modernization, the bridge construction in our country has got an unprecedented development opportunity. At present, the bridge in the northwest mountainous area often attaches importance to the safety and economy of the construction stage, but the problems of the bridge in the period of operation have not received due attention. During the operation of loess gully topographic bridge substructure, various problems are exposed, such as pile foundation exposure, soil collapse and loss around pile, scour caused by concentrated drainage of bridge deck and rainfall on pile foundation, bridge abutment slab cutting, conical slope subsidence, etc. Because the disasters occurred during the operation of bridges in mountainous areas have not been paid attention to and solved effectively, the bridge often causes huge maintenance costs after the operation safety risks occur. Based on the research results at home and abroad, this paper makes an extensive investigation on the substructure of the bridge in the loess region of northwest China, and analyzes the risk evolution law of the bridge substructure in loess gully terrain by means of entropy theory. On this basis, the management method is discussed. The main contents of this paper are as follows: firstly, a wide range of disasters occurred during the operation of the substructure of the loess gully bridge in Northwest China are investigated, and the common diseases are systematically classified. Then, the causes of the disease and the characteristics of disasters are analyzed in depth. On this basis, the risk system of loess gully terrain bridge during the operation period is established, and the characteristics and dynamic mechanism of the risk system are analyzed. Secondly, on the basis of disease investigation, risk system characteristics and dynamic mechanism analysis, the study method of risk evolution law during the operation of loess gully terrain bridge is established by using entropy theory. Finally, based on the study of the risk evolution law, a multi-level protection strategy is proposed to improve the safety performance and operation level of the bridge in loess gully terrain. It is necessary to study the risk evolution law and protection management during the operation of loess gully topographic bridge. The research results of this paper will have important guiding significance for the safety operation and management of the existing typical concrete bridges of expressway in the mountainous areas of northwest China, and it will also be useful for the planning and design of highway bridges in the mountainous areas in the future.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U447

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本文編號(hào)：1804732