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当前高速公路建设多地处山岭重丘区,经常跨越深沟河谷,桥梁建筑高度高、施工难度大。由于墩高、跨度较大,对施工测量控制提出了较高的要求。现以笔者参建的40米空心薄壁墩为例,谈谈自己对高墩测量控制的一点认识。平面控制测量开工前首先应加密布设导线施工平面控制网,以保证桥梁平面控制测量的精度,为放样工作创造有利条件。在曲线桥上,高墩中心定位测量采用三维坐标控制法,同时采用三
At present, the construction of expressways is mostly located in mountainous heavy hilly areas and often crosses deep-ditch valleys. The construction of high-rise bridges makes construction difficult. Due to the pier height, span greater, the construction of the measurement and control put forward higher requirements. Take the 40-meter hollow thin-walled piers that I participated in for reference as an example to talk about my understanding of high-pier measurement and control. Before the start of the plane control measurement, the conductor construction plane control network should be arranged in the first place to ensure the accuracy of the bridge plane control measurement and create favorable conditions for the stakeout work. In the curve bridge, high pier center positioning measurement using three-dimensional coordinate control method, while the use of three