【摘要】：以京�？蛯ｉ}贛段為代表的山區(qū)鐵路線路具有太陽輻射強(qiáng)、氣候多變、地形地質(zhì)條件復(fù)雜的特點(diǎn),其橋隧眾多。針對山區(qū)高速鐵路橋梁-無砟軌道系統(tǒng)的環(huán)境特征和結(jié)構(gòu)特點(diǎn),開展箱梁-無砟軌道溫度場測試、橋隧過渡段鋼軌非線性溫度分布測試,以及列車作用下橋梁-雙塊式無砟軌道動力響應(yīng)測試。研究結(jié)果表明:箱梁及無砟軌道溫度場呈非線性分布,可在我國鐵路規(guī)范的基礎(chǔ)上,將箱梁頂板溫度梯度擬合為指數(shù)函數(shù)、將底板溫度梯度擬合為線形函數(shù);橋隧過渡段鋼軌縱向存在較大溫差,溫差幅度可達(dá)-5~21℃;列車運(yùn)行引起的結(jié)構(gòu)豎向加速度從鋼軌、軌道板、道床板到橋面依次降低,軌道結(jié)構(gòu)耗能作用明顯。
[Abstract]:The mountain railway line represented by Beijing Fuke Special Fujian and Jiangxi Province has the characteristics of strong solar radiation, changeable climate and complex topographic and geological conditions, and there are many bridges and tunnels. According to the environmental and structural characteristics of the bridge-ballastless track system of high-speed railway in mountainous areas, the temperature field of box girder and ballastless track, the nonlinear temperature distribution of rail in the transition section of bridge and tunnel, and the dynamic response test of bridge-double-block ballastless track under train action are carried out. The results show that the temperature field of box girder and ballastless track is nonlinear distribution, which can be fitted as exponential function and bottom plate temperature gradient as linear function on the basis of railway code in our country, and there is a large temperature difference in the longitudinal direction of rail in the transition section of bridge and tunnel, and the temperature difference can reach-5 鈮，

本文編號：2520061