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以港珠澳大桥通航孔江海直达船航道桥首个钢索塔吊装为工程背景,讨论了在钢索塔吊装施工全过程进行的监测。通过在钢索塔吊装前准确定位Z0节段,吊装过程中使用高精度仪器对浮吊轴线、浮吊主钩高度及吊具倾斜度进行严密监测,确保浮吊轴线一致、浮吊主钩高度一致及吊具不产生过大的倾斜度,使得钢索塔能安全顺利地吊装就位,也使得钢索塔安装就位后的垂直度满足了H/4 000的高精度要求。
Taking the first steel tower hoisting of Jianghai-Zhuhai-Hong Kong-Zhuhai-Macao Bridge navigable through Jianghai direct shipway bridge as engineering background, the whole process of hoisting construction of steel tower was discussed. By accurately positioning the Z0 segment before hoisting the steel tower, the high-precision instrument is used during the hoisting process to closely monitor the floating crane axis, the height of the main hook of the floating crane and the inclination of the spreader to ensure the consistent axial alignment of the floating crane and the height of the main hook of the floating crane Consistent with the spreader does not produce too much inclination, making the steel tower safe and smooth lifting in place, but also makes the vertical installation of the steel tower in place to meet the H / 4000 high precision requirements.