服役25年预应力混凝土空心大板突发断裂原因调查及分析  

Investigation and Analysis on the Cause of Break Fracture of Pre-Stressed Concrete Hollow Large Plate after 25 years’Service

作　　者：李森林[1] 沈剑 冯妍 曹宏生[1] 吴烨[1] Li Senlin;Shen Jian;Feng Yan;Cao Hongsheng;Wu Ye(Nanjing Hydraulic Research Institute,Nanjing Jiangsu 210029,China;Ningbo Zhoushan Port Company Limited,Ningbo Zhejiang 315800,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]宁波舟山港股份有限公司,浙江宁波315800

出　　处：《城市建筑》2021年第30期125-127,共3页Urbanism and Architecture

基　　金：国家重点研发计划(2018YFC0407102);中央级公益性科研院所基本科研业务费专项资金(Y420004)。

摘　　要：针对服役25年预应力混凝土空心大板运营过程中突发断裂的具体情况,采用现场调研、室内试验及理论分析相结合的方式,从运行工况、钢筋锈蚀、氯离子污染程度及受力分析等方面,全面系统地分析了运营状态中预应力混凝土空心大板断裂的原因,本文研究成果可供类似工程参考借鉴。In view of the specific situation of sudden fracture in the operation of pre-stressed concrete hollow large plate after 25 years’service,relevant investigations are carried out to find out the causes of fracture by means of on-site investigation,indoor test and theoretical analysis.The paper analyzes the reasons for the fracture of prestressed concrete hollow slab in the operating state from the aspects of operating conditions,steel corrosion,chloride ion pollution and stress analysis,and so on.The research results of this paper can be used as a reference for similar projects.

关 键 词：预应力混凝土空心大板 断裂 钢筋锈蚀 氯离子 原因分析 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]