本文關(guān)鍵詞：鐵路橋梁高墩適應(yīng)性研究　出處：《鐵道工程學(xué)報(bào)》2014年11期 　論文類型：期刊論文

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【摘要】：研究目的:艱險(xiǎn)山區(qū)修建鐵路,需要跨越深溝峽谷,必然出現(xiàn)大量的高墩大跨橋梁。隨著新建鐵路運(yùn)行速度及墩高的增加,為滿足橋梁動(dòng)力性能,針對(duì)山區(qū)地形地質(zhì)特點(diǎn),采用不同的高墩型式,對(duì)墩身工程數(shù)量及經(jīng)濟(jì)指標(biāo)影響較大。本文重點(diǎn)圍繞鐵路橋梁高墩的墩型適應(yīng)性展開研究,掌握不同類型高墩的受力特點(diǎn)、合理墩高適用范圍以及經(jīng)濟(jì)指標(biāo)等。研究結(jié)論:(1)提出了不同高墩墩型的經(jīng)濟(jì)合理的適用范圍:當(dāng)墩高H≤80 m時(shí),應(yīng)首選單坡空心墩;當(dāng)墩高100 mH80 m時(shí),掃帚型墩經(jīng)濟(jì)性更優(yōu);當(dāng)墩高H100 m時(shí),A型(含人字)橋墩具有明顯的經(jīng)濟(jì)優(yōu)勢;人字墩適宜于墩高在100~120 m的高墩梁橋,當(dāng)墩高大于120 m時(shí),宜首選A型高墩。(2)提出了針對(duì)艱險(xiǎn)山區(qū)不同地形地質(zhì)條件下A型(含人字)墩基礎(chǔ)合理采用形式:對(duì)于地形坡度相對(duì)較陡、地質(zhì)相對(duì)較好的場地,可采用不等高A型斜腿的分離式基礎(chǔ);對(duì)于地形坡度相對(duì)較緩、地質(zhì)相對(duì)較差的場地,可采用A型墩啞鈴型基礎(chǔ)或整體式基礎(chǔ)。(3)本文研究成果對(duì)艱險(xiǎn)山區(qū)鐵路橋墩墩型的合理選用具有指導(dǎo)意義。
[Abstract]:The purpose of this study is to build a railway in difficult and dangerous mountainous areas, which needs to cross deep gullies and canyons, and there must be a large number of long-span bridges with high piers. With the increase of the operating speed and the height of piers, the dynamic performance of the bridges will be satisfied. According to the characteristics of terrain and geology in mountainous areas, different types of high piers have great influence on the quantity of piers and economic indexes. This paper focuses on the adaptability of high piers of railway bridges. Grasp the force characteristics of different types of high pier, reasonable pier height applicable range and economic indicators. The conclusion of the study of different high pier type of economic and reasonable application range: when the pier height H 鈮，

本文編號(hào)：1375066