建筑物在开工之前,必须进行测量放线。近年来,我们在测量放线中,采用了钢筋门式放线桩代替传统的木龙门桩的做法,效果很好。现将钢筋门式放线桩介绍如下。钢筋门式放线桩采用φ12～φ16的圆钢筋焊成,形状见图1,并将 Before the construction of the building, measurements must be taken and the line must be measured. In recent years, we have adopted the practice of replacing the traditional wooden gantry piles with rebar pilings in the measurement and pay-off, which is very effective. Now we will introduce the reinforcement gate type stakes as follows. Reinforced steel gate type piles are welded using circular steel bars of φ12～φ16. The shape is shown in Figure 1 and will be