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群桩基础施工放线,如何准确、迅速确定各桩桩位点的位置至关重要。施工放线一般采用经纬仪确定主轴线后,结合钢卷尺使用距离交汇法确定桩位点,但距离交汇法容易产生偏差。而采用模型法确定群桩桩位点既迅速又准确,同时又减少重复测距,节省施工放线人力。 所谓模型法就是根据桩基特征,用纤维板或硬纸板制成与实际桩基比例一致的具有桩间距特征的模型,施工放线时用模型确定桩位点位置。 比如敦化市国防大厦工程群桩桩基90％是四
It is very important to accurately and quickly determine the position of each pile pile point in the construction of pile foundations. After the construction line is generally determined by the theodolite to determine the main axis, combined with the steel tape measure using the distance intersection method to determine the pile point, but the distance to the intersection method is prone to deviation. The model method is used to determine the location of the group piles quickly and accurately. At the same time, it reduces the repeated distance measurement and saves manpower for construction and release. The so-called model method is based on the characteristics of the pile foundation, using fiberboard or cardboard to make the model with the pile spacing characteristics consistent with the actual pile base, the construction site to determine the location of pile points. For example, 90% of the pile foundations in the defense building project of Dunhua City are four.