凤凰山高架桥和凤凰山路、双沙路、双瑞二路工程变形监测技术方案四川建信质量检测技术有限公司二〇一七年一月凤凰山高架桥和凤凰山路、双沙路、双瑞二路工程安全监测技术方案编写：校核：审核：四川建信质量检测技术有限公司二〇一七年一月1项目概况.........................................................................................................12监测目的和内容...............................................................................................12.1监测目的................................................................................................12.2监测内容................................................................................................23监测技术依据...................................................................................................24新建桥梁沉降监测...........................................................................................34.1基准网布设......................................................................................34.1.1基准点选择................................................................................34.1.2基准网测量................................................................................34.1.3成果计算....................................................................................44.1.4检核周期....................................................................................44.1.5基准点稳定性判断....................................................................44.2墩身沉降监测..................................................................................54.2.1点位布设....................................................................................54.2.2测量技术要求............................................................................64.2.3数据处理....................................................................................74.3监测预警................................................................................................85桥梁拓宽段监测...............................................................................................85.1新桥上部结构的沉降位移及收缩徐变挠度监测.................................95.2新旧桥结合处的应力应变监测...........................................................105.3新旧桥结合处的混凝土裂缝监测.......................................................125.3.1自动化测量原理........................................................................125.3.2安装方法...................................................................................136邻近既有建（构）筑物监测..........................................................................146.1测点布设..............................................................................................146.2测量方法..............................................................................................156.3监测频次..............................................................................................156.4监测预警..............................................................................................156.4.1既有桥墩沉降现场监测控制标准............................................156.4.2既有桥墩水平位移现场监测控制标准............................................167监测信息平台.................................................................................................1688监测信息...
