新型铁路隧道防护门结构设计及疲劳性能试验研究

Experimental Study on Structural Design and Fatigue Performance of New Protective Door for Railway Tunnel

在论述铁路隧道内设置防护门重要性的基础上,调研我国既有铁路隧道防护门存在的问题,比选玻璃纤维增强复合材料、钢材、混凝土及航空航天领域新材料的优缺点。针对玻璃纤维增强复合材料具有轻质高强、不腐蚀、价格低廉等特点,开展铁路隧道新型防护门结构设计,并研发配套防护门疲劳试验装置。试验结果表明:该新型隧道防护门结构性能优良,可抵御在压强为±6kPa、频率为5Hz条件下1×10~7次疲劳荷载,可为铁路隧道及类似地下工程抗风压防护门设置提供借鉴。

Elaborating on the importance of protective doors to railway tunnel engineering, the paper carries out research investigation on the challenges encountered in the application of such doors and compares the performance of glass-fiber reinforced composite materials, steel, concrete and new aerospace materials. Given the lightness, high strength, corrosion resistance and low cost of the glass fiber materials, the paper designs a new protective door for railway tunnels and tailors out the fatigue testing devices accordingly. The results show that the new protective door developed promises great structure performance, as it is capable of withstanding 1×10^7 rounds of fatigue loading with a ±6 kPa pressure and 5 Hz frequency. The paper is of reference to the setting of protective doors to railway tunnels or other underground projects alike.