本文選題：重載鐵路 + 小跨徑橋梁�。� 參考：《石家莊鐵道大學(xué)》2015年碩士論文

【摘要】：重載鐵路運(yùn)輸?shù)目焖侔l(fā)展提高了鐵路的運(yùn)輸能力和經(jīng)濟(jì)效益,但列車軸重提高和編組增加給既有鐵路橋梁帶來(lái)了嚴(yán)重的影響。采用現(xiàn)有標(biāo)準(zhǔn)設(shè)計(jì)的橋梁結(jié)構(gòu),雖然在很大程度上可以滿足列車運(yùn)營(yíng)要求,但也暴露出小跨度橋梁橫向剛度不足、橋墩橫向振動(dòng)偏大、支座病害加劇等危及列車安全的問(wèn)題。本文以大秦鐵路重載運(yùn)輸條件下小跨徑混凝土簡(jiǎn)支梁橋?yàn)檠芯繉?duì)象,通過(guò)既有橋梁的整治加固改造,分析橋梁整治加固后的效果和運(yùn)營(yíng)狀態(tài)進(jìn)行系統(tǒng)的研究,主要研究?jī)?nèi)容如下:(1)中小跨度鋼筋混凝土并置梁的橫向剛度偏小,針對(duì)橫向聯(lián)結(jié)問(wèn)題,提出了相應(yīng)的橫向加固措施,以及相應(yīng)的梁端橫向限位措施;以跨度8m的鋼筋混凝土梁為研究對(duì)象,通過(guò)實(shí)橋試驗(yàn)和室內(nèi)實(shí)體梁模擬試驗(yàn),提出了梁體豎向剛度偏弱等問(wèn)題相應(yīng)的整治措施。(2)針對(duì)雙柱式橋墩橫向振動(dòng)大的問(wèn)題,大秦鐵路既有橋梁為例,提出多種設(shè)計(jì)加固方案,并對(duì)其進(jìn)行有限元對(duì)比分析,結(jié)合實(shí)橋運(yùn)營(yíng)性能試驗(yàn),分析提高雙柱式橋墩橫向剛度的加固效果,提出相應(yīng)的加固改造方案。(3)針對(duì)搖軸活動(dòng)支座位移量偏大和定位銷折斷等病害,通過(guò)分析支座病害成因,結(jié)合大秦鐵路既有橋梁支座應(yīng)用情況,提出了搖軸活動(dòng)支座病害整治及更換工藝;針對(duì)中小跨度混凝土梁平板、弧形支座錨栓折斷等病害,通過(guò)分析支座病害成因,提出了相應(yīng)的整治措施。
[Abstract]:The rapid development of heavy-haul railway transportation improves the transportation capacity and economic benefit of the railway, but the increase of the axle load and the formation of the train has brought serious influence to the existing railway bridges. Although the existing standard design of bridge structure can meet the requirements of train operation to a great extent, it also exposes some problems that endanger train safety, such as insufficient lateral stiffness of small span bridge, large lateral vibration of piers and worsening of support diseases. This paper takes the small span concrete simply supported beam bridge under the heavy load transportation condition of Daqin Railway as the research object, through the renovation and reinforcement of the existing bridge, analyzes the effect and operation state of the bridge after the renovation and reinforcement. The main research contents are as follows: (1) the lateral stiffness of the small and medium-sized span reinforced concrete parallel beam is small. Aiming at the problem of transverse connection, the corresponding transverse reinforcement measures and the corresponding lateral limit measures are put forward. Taking the reinforced concrete beam with a span of 8 m as the research object, through the real bridge test and the indoor solid beam simulation test, the corresponding regulation measures, such as the weak vertical stiffness of the beam body, etc., are put forward, which aim at the problem of large transverse vibration of the double-column pier. As an example of existing bridges in Daqin Railway, various design and reinforcement schemes are put forward, and finite element comparison analysis is carried out on them. Combined with the operation performance tests of real bridges, the reinforcement effect of improving the lateral stiffness of double-column piers is analyzed. This paper puts forward the corresponding reinforcement and reconstruction scheme. (3) aiming at the diseases such as the large displacement of the movable bearing of the rocking shaft and the breakage of the locating pin, the causes of the disease of the bearing are analyzed, and the application of the existing bridge support in the Daqin Railway is combined. The treatment and replacement technology of the movable bearing of rocking shaft are put forward, and the corresponding measures are put forward by analyzing the causes of the disease of the bearing, aiming at the diseases such as the plate of medium and small span concrete beam and the broken bolt of the arc bearing.
【學(xué)位授予單位】：石家莊鐵道大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.7

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本文編號(hào)：2036945