本文阐述了喷射砼支护技术的作用机理、特点、施工流程、施工方法,并进行了应用效果和效益的分析。并结合淠史杭灌区淠河总干渠青龙堰渠下涵,除险加固工程实例证明,喷射砼支护是一项省工、省料、易操作、速度快、适应性强、造价低的涵洞除险加固新技术,值得推广。 This paper expounds the action mechanism, characteristics, construction flow and construction method of spraycrete support technology, and analyzes the application effect and benefit. Combining with the downstream culverts of Qinglong weir drainage in the main trunk canal of Bahe River in Pishihang Irrigation Area, it is proved that the project of eliminating danger and reinforcing projects is a kind of culvert with saving labor, material saving, easy operation, high speed, adaptability and low cost Ex-reinforcement of new technologies, it is worth promoting.