片石拱桥现状检测评估及加固应用  

Status Inspection,Assessment and Reinforcement Application of Rubble Arch Bridge

作　　者：彭伟 郑建红[3] Peng Wei;Zheng Jianhong(Chongqing AnJi Construction ＆ Reinforcement Engineering Co.,Ltd.,Chongqing 401120,China;State Key Laboratory of Bridge Engineering Structure Dynamics,Chongqing Communications Technology Research ＆Design Institute Co.,Ltd.,China Merchants Group,Chongqing 400067,China;Chongqing Zhongshe Engineering Design Co.Ltd.,Chongqing 400025,China)

机构地区：[1]重庆安济建设加固工程有限责任公司,重庆401120 [2]招商局重庆交通科研设计院有限公司桥梁工程结构动力学国家重点实验室,重庆400067 [3]重庆中设工程设计股份有限公司,重庆400025

出　　处：《湖北工程学院学报》2018年第3期101-105,共5页Journal of Hubei Engineering University

基　　金：重庆市教委科学技术研究项目(KJ1401323);山区桥梁与隧道工程国家重点实验室培育基地开放基金资助项目(CQSLBF-Y12-3)

摘　　要：片石拱桥通常具有结构整体性差和设计荷载等级低等特点,受交通量增大与养护不及时等影响,容易产生结构病害和安全隐患。以两座在役片石拱桥为分析对象,通过检测表观病害后按行业规范进行桥梁技术状况评估,分析主要病因后提出加固处治方案。结果表明该桥现状技术等级为4类,主要病害为拱圈砌缝脱落和桥台基础冲刷,为改善结构性能并考虑加固施工的可行性,通过增设钢筋混凝土板拱并对桥台基础进行护砌处治,使桥梁技术状况等级提高为2类。建议后期运营中加强此类桥梁的检测频次与养护力度。Rubble arch bridge has the characteristics of weak construction integrality and low level of design load.Due to the growing traffic volume and untimely maintenance,structure defects and potential safety hazards easily arise.Taking two rubble arch bridges in service as subjects,this paper first detected the apparent defects of the two bridges and then made an assessment of their technical conditions according to the relevant specifications.At last a strengthening treatment scheme is proposed after the analysis of the main reasons for the defects.The results show that the presented technical level of the two rubble arch bridges are in the fourth category,and the main defects lie in the arch circle′s spalling of mortar joints and the bridge abutment′s foundation scours.To improve the structure properties and in view of the practicality of strengthening construction,the researchers have promoted the structure performance of technical level to the second category by means of additional reinforced concrete plate arch and concrete-embankment treatment in the bridge abutments′foundation.In addition,it is suggested that such bridges ought to be detected more frequently and maintenance strength should also be increased in the later management.

关 键 词：片石拱桥 检测评估 砌缝脱落 基础冲刷 复合主拱圈 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] TU746.3[交通运输工程—道路与铁道工程]