悬浇箱梁底板崩裂原因分析及预防措施  

Analysison the crack cause in the bootom slab of cantilever box girder and preventive measures

作　　者：李立群 梁明进 许俊[2] 

机构地区：[1]杭州市交通工程安全质量监督局,浙江杭州310014 [2]同济大学桥梁工程系,上海200092

出　　处：《上海公路》2013年第1期37-40,13,共4页Shanghai Highways

摘　　要：预应力混凝土变截面连续箱梁桥在合龙施工过程中,出现底板混凝土崩裂的现象。就此运用计算软件对箱梁的局部应力进行分析,并通过对案例桥的验证判断出造成底板混凝土崩裂的主要原因是合龙底板预应力束管道的竖向偏差以及底板防崩钢筋的设置不足。In the process of closure construction,cracks may emerge in the bottom slab of the prestressed concrete continuous box girder bridge with variable cross section.In this paper,the local stress of box girder was analysed with software.Verified with background bridge,the writer the main cause leading to cracks of bottom slab was proved that vertical deviation of the prestressed pipes and lack of anti-collapse reinforcing steel bars.

关 键 词：箱型梁桥 预应力管道偏差 底板混凝土崩裂 

分 类 号：U445.57[建筑科学—桥梁与隧道工程]