摘要:研究目的:兰新高铁穿过著名的百里风区，为减小大风对高速铁路运营的影响，在百里风区的核心区设 置封闭的防风明洞。本文结合百里风区的大风特征和环境特点，确定该防风明洞结构形式，并对戈壁大风区 防风明洞的施工工艺、接缝连接形式及通风、采光、泄压孔等进行研究。研究结论:( 1)确定了防风明洞结构形式为“桩基+纵梁+拱形混凝土结构”；（2)防风明洞拱形混凝土 结构采用工厂化预制+现场拼装的施工方式）（3)预制构件之间采用“型钢-后浇混凝土”的刚性连接技术； (4)为实现防风明洞自然采光、自然通风以及缓解空气动力学效应，提出在防风明洞结构背风侧设置通风、采 光、泄压孔；（5)本研究成果可用于公路、铁路穿越大风区等环境敏感地段的隔离防护工程，也可为类似工程 的。

Abstract :Research purposes : Lanzhou - Xinjiang high - speed railway passes through the 50 - km wind area，in order to reduce the wind ；fects on the safety of high speed railway in operation phases，the wind - resistant gallery was first proposed and designed in the core area of tlie 50 - km wind region. The structural style of wind - resistant gallery was determined and the construction technology，connection type，ventilation lighting and pressure relief holes were studied based on the characteristics of tlie strong wind and wind - resistant gallery. Research conclusions:( 1) The wind - resistant gallery consists of the pile foundation，longitudinal beam and concrete vault. (2)The construction method with the factory prefabrication and on - site consolidation is applied in the wind - resistant gallery. (3 ) The rigid connection technology with shape steel and post - poured concrete is applied in the precast segment. (4) In order to implement the function of natural lighting， natural ventilation and relieve the aerodynamic effect，ventilation lighting and pressure relief holes are designed in the leeward side of the wind - resistant gallery. The research results can be used for the protection engineering in highway and railway that located in the environmental sensitive area，and also can be used for the reference for the similar engineering construction.