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基础土方挖完后,施工员要利用控制桩或龙门板来精确地放线,以保证砖砌体、钢筋绑扎和木模安装等工序的顺利进行。平时多用经纬仪或线坠来完成这项工作。但在具体施工中往往会因为各种障碍物挡住了视线,经纬仪不能顺利地瞄准所需的地方,或坑槽太深,风力稍大,线坠不能精确地吊中,给施工放线带来一定困难。现介绍一种利用物体与水中倒影重合时必然垂直于水面的原理的方法,来帮助完成放线工作,就能避免上述困难,而达到较精确的效果。这种方法简
After the foundation earthwork is dug, the construction worker shall use control piles or gantry panels to accurately place the wires so as to ensure the smooth progress of the brickwork, steel reinforcement, and wood mold installation. Usually use theodolite or wire pendant to complete this work. However, in the concrete construction, obstacles may be obstructed by various obstacles. Theodolite cannot be aimed at the desired place smoothly, or the pit is too deep and the wind is slightly larger. The line can’t be hung accurately, which will bring the line to the construction. It must be difficult. A method of using the principle that the object and the reflection in the water are necessarily perpendicular to the water surface is introduced to help complete the line-releasing work, and the above-mentioned difficulties can be avoided to achieve more accurate results. This method is simple