为解决兰州长寿山隧道内沙石堆积、粉尘污染严重和空气污染严重等病害，分析国内外处理类似问题的现有设备及其优缺点，并结合长寿山隧道病害特点，提出适合长寿山隧道病害的机械化解决方案。以现有国铁NX70路用平车为平台，在其上集成隧道除尘设备。该设备包括除尘系统、风机系统和工作装置等。除尘系统采用重力除尘器、多管旋风除尘器和滤筒式除尘器相结合的3级除尘设备来达到隧道除尘要求。根据实际除尘需求进行风机系统设计，选择与实际工作情况相匹配的风机。选配不同的工作装置来处理隧道内分布在不同区域的沙石。试制样机并在长寿山隧道内进行病害处理试验。试验表明，该设备可有效处理长寿山隧道病害，提高工作效率，降低除尘成本。

Many diseases exist in Changshoushan tunnel in Lanzhou, which includes sand stacking and serious dust and air pollution. Accordingly, the existing equipments for sand and dust removal and relevant characteristics in China and other countries are analyzed, so as to provide mechanized solutions for Changshoushan tunnel. The Guo Tie NX70 flat car is taken as a case study, and a dust removal equipment is equipped on it. The equipment includes a dust removal system, fan system, and working devices. A threelevel dust removal system integrating gravity dust collector, multipipe cyclone dust collector, and filter cylinder dust collector is adopted. Targeted fan system is designed according to dust removal requirement, and various working devices are matched according to sand distributions. The prototype is trialproduced and applied to the disease treatment experiment in Changshoushan tunnel. The test results show that the equipment can effectively deal with the diseases of Changshoushan tunnel, improve the work efficiency, and reduce the cost of dust removal, providing references for similar projects in the future.