重载铁路振动对沿线建筑物结构影响试验

Experimental Study on Ambient Building Damage Caused by Heavy-haul Railway Operation

选取重载铁路沿线四处有代表性的单层砖混结构建筑物为研究对象,建筑物中心距离铁路分别为6.5 m、15 m、26 m、38 m,其中15 m处的建筑物可作为铁路振动引起建筑物损伤的典型样本。对由列车引发的建筑物基础和屋顶处的振动响应进行现场测试和分析,并将峰值振动速度PPV实测结果与中外相关标准进行对比。结果表明,当峰值振动速度PPV超出GB 50868-2013中的第三类振动限值时,会对我国铁路沿线"建造质量较差的建筑"产生损害。

Four representative residential buildings of single-layer brick-concrete structure with the distances of 6.5m,15 m, 26 m and 38 m respectively away from the railway were selected to study their damage situations. Of them the building15 m away from the railway was used as a typical sample of damage. Vibration responses of the foundations and roofs of the buildings induced by the train operation were measured and analyzed. The measured data of PPV of the vibration velocity was compared with that of domestic and international standards. Results show that, when the PPV of the vibration velocity exceeds the vibration limits of the third kind in GB 50868-2013 standard, the poor quality buildings beside the railway will damage.