基于大跨度连续刚构桥的施工测量技术研究

Construction Survey Technical Research of Long-span Continuous Rigid-framed Bridge

以西北某大型连续刚构桥为实例研究对象,对桥梁内力状态和线性进行了现场数据测量,并通过构建的MIDAS施工模型对桥梁施工各阶段受力状态和变形值进行计算模拟。结果表明:通过实测数据和理论计算数据对比分析,数据误差在允许范围内,有效的降低了单独现场测量中挂篮预应力、预应力束缚、材料容重系数等对测量结果的影响,提高了刚构桥合拢精度。整个工程线性良好,受力符合标准规范。通过现场测量数据和软件计算模拟数据相互对比分析下对大跨度连续刚构桥的测量监控是成功的,可为同类刚构桥的测量监控提供一定借鉴意义。

based on the northwest a large continuous rigid frame bridge as an example the research object,the internal force state of the bridge and linear data measured on site,and by building a MIDAS construction model of bridge construction in different stages of the stress state and deformation value calculation and simulation. Results show that by comparison with measured data and theoretical calculation of data analysis,data error in allowed range,effectively reduce the hanging basket prestress,prestress tie in separate field measurement,material density coefficient on the measurement results,the influence of the bridge closed precision is improved. Linear is good,the whole project conforms to the standard specification. Through the field measurement data and software simulation data comparison analysis of the measurement monitoring of long-span continuous rigid frame bridge is successful,can provide some reference for similar bridge measurement monitoring.