（中国铁建投资集团有限公司， 北京 100855 ）

［摘要］为了确定桥梁结构在静载作用下的受力状态和工作状态，评定桥梁能否正常使用，详细阐述了跨西干渠中桥20m超低高度预应力混凝土梁的静载试验全过程。通过试验得出桥梁的跨中挠度和跨中截面应变的试验值与《铁路桥梁检定规范》中规定限值的差距，为桥梁加固、桥梁限速等提供依据。

［关键词］静载试验； 挠度； 截面应变

中图分类号： TU391 文献标识码： A文章编号：  1002-848X(2016)S1-0687-04

 Static load test of very shallow prestressed concrete beam with 20m span

Xu Huaiwei

(China Railway Construction Investment Group Corporation Limited, Beijing 100855, China)

Abstract: In order to determine the stress state of the bridge, the working conditions under static loads and assess whether the bridge is still under the state of serviceability. The whole process of a 20m very shallow prestressed concrete beam named Xiganqu midde bridge under static load test was elaborated. The deflection of the bridge and strain of the mid-span section were obtained by test and compared with the values of Test Specification of Railway Bridge, which provides a basis for bridge reinforcing and speed limit of train.

Keywords: static load test； deflection； section strain

作者简介： 徐怀卫，硕士，工程师，Email：106326752@qq.com。