Attention shall be paid to the operation of sign piles:

1、测量放线的基准点一定要采用GPS定位，其中放线基准点是指设计控制桩和水准基桩。

1. GPS positioning must be adopted for the datum point of Surveying and setting out. The datum point of setting out refers to the design control pile and leveling pile.

2、一定要按照图纸的作业要求设置控制桩，一定要表明桩号、里程、地面标高、转角高度等数据。

2. The control piles must be set according to the operation requirements of the drawings, and the data such as pile number, mileage, ground elevation and corner height must be indicated.

3、在定测资料和平面或是断面图纸上表明地下的障碍物，其次是，要保证线路和地下构筑物交叉两侧的控制范围为3米，同时，需要设置警告牌和标志桩。标志桩上需要写上相关的数据。比如：埋深，交叉尺寸等。

3. Indicate the underground obstacles on the location survey data and plane or section drawings. Secondly, ensure that the control range on both sides of the intersection of the line and underground structures is 3M. At the same time, set warning signs and sign piles. Relevant data shall be written on the sign pile. For example, burial depth, crossing size, etc.

4、关于划线方面，要根据轴线和标志桩的界限之间拉一根绳子，撒上白石灰划线。完成划线，要清理现场的障碍物。

4. As for the marking, a rope shall be pulled between the axis and the boundary of the sign pile, and white lime shall be sprinkled for marking. After finishing the marking, the obstacles on the site shall be cleared.

5、关于移桩方面，是在划线完成之后打扫清理之前，将所有需要的线管桩平移到土堆的旁边，范围控制在0.3m。

5. In terms of pile moving, all required pipeline piles shall be moved to the side of the soil pile after the completion of marking and before cleaning, and the range shall be controlled within 0.3m.