拼装式桥涵是近年来桥涵施工中的一项新技术。但像青藏铁路线上被广泛采用的拼装结构型式和数量在国内是少见的。通过该线拼装中小桥涵的科研试验、设计、施工和3～7年的安全运营,充分证明它具有质量好、速度快、造价低、便于管理和工厂化生产等优点。 地处海拔高的青藏铁路缺氧、缺水、干 Assembled bridge and culvert is a new technology in bridge and culvert construction in recent years. However, as the Qinghai-Tibet Railway line assembly structure is widely used in the type and quantity is rare in the country. Through the line assembly of small bridges and culverts scientific research, design, construction and 3 to 7 years of safe operation, fully proved that it has the advantages of good quality, fast, low cost, easy management and factory production. Qinghai-Tibet Railway is located in high altitude hypoxia, water shortage, dry