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为识别误差,将高程测量系统模型分为高程测量模型和高程测点模型。文中对预应力混凝土桥梁悬臂施工控制中主梁高程测点模型的系统误差进行详细分析,并通过采取合理措施进行消除。同时分析指出,施工规范中利用主梁顶面高程作为施工控制的质量标准,理论上可行,而实际获取的顶面高程结果可能无效。建议采用主梁底面高程作为施工控制的质量标准。
To identify the error, the elevation measurement system model is divided into elevation measurement model and elevation measurement model. In this paper, the system error of main girder elevation measuring point model in cantilever construction control of prestressed concrete bridge is analyzed in detail and eliminated by taking reasonable measures. At the same time, it is pointed out that it is theoretically feasible to use the top elevation of the main girder as the construction quality control standard in the construction norms, but the actually obtained top elevation result may be invalid. It is suggested to use the bottom elevation of the main girder as the quality standard for construction control.