Detection and Genesis Analysis of Cracks in Prestressed Box Girder of a Certain Project  

作　　者：Mingnan Ji Mingnan Ji(Inspection and Certification Co., Ltd., MCC, Beijing, China)

机构地区：[1]Inspection and Certification Co., Ltd., MCC, Beijing, China

出　　处：《World Journal of Engineering and Technology》2024年第4期1075-1082,共8页世界工程和技术（英文）

摘　　要：This paper introduces a crack detection example of the prestressed box girder in a certain project. The morphology of the box girder cracks was surveyed and mapped. The length, width, and depth of the cracks were inspected, and the strength and reinforcement configuration of the components were tested. The test results indicate that the strength and reinforcement configuration of the inspected components meet the design requirements. The crack at the end of the top plate of the box girder is a local compressive crack at the anchorage end. The width and length of the crack on the bottom surface of the top plate are not significant, and the depth is relatively shallow. Judging from the crack morphology, this crack is identified as a temperature crack. Additionally, based on the treatment measures for cracks of different widths, the treatment measures for the cracks of the components in this project are derived, providing a reference basis for similar projects in the future.This paper introduces a crack detection example of the prestressed box girder in a certain project. The morphology of the box girder cracks was surveyed and mapped. The length, width, and depth of the cracks were inspected, and the strength and reinforcement configuration of the components were tested. The test results indicate that the strength and reinforcement configuration of the inspected components meet the design requirements. The crack at the end of the top plate of the box girder is a local compressive crack at the anchorage end. The width and length of the crack on the bottom surface of the top plate are not significant, and the depth is relatively shallow. Judging from the crack morphology, this crack is identified as a temperature crack. Additionally, based on the treatment measures for cracks of different widths, the treatment measures for the cracks of the components in this project are derived, providing a reference basis for similar projects in the future.

关 键 词：Prestressed Box Girder Crack Detection Cause Analysis Treatment Measures 

分 类 号：U44[建筑科学—桥梁与隧道工程]