电杆选择及埋设安全技术交底

1、电杆宜采用钢筋混凝土杆。钢筋混凝土电杆不得露筋，并不得有环向裂纹和扭曲等缺陷。若采用木杆和木横担，其材质必须坚实，不得有腐朽、劈裂及其他损伤。木杆总长度不宜小于8m，梢径不宜大于140mm。                                                                                                                                                          

2、电杆埋设应符合下列要求：                                                                                                                                                          

  ⑴不得有倾斜、下沉及杆基积水等现象，不能满足要求时应加底盘或卡盘；                              ⑵回填土时应将土块打碎，每回填0.5m夯实一次。杆坑应设防沉土台，其高度应超出地面0.3m；                                                                                                                                                          

  ⑶电杆埋设深度应符合设计要求，当设计无要求时宜符合下表1的规定。                            

  ⑷严寒地区应埋在冻土层以下。                                                                                                                                                          

  ⑸装设变压器的电杆，其埋设深度不宜小于2m。                                                                                                                

3、拉线埋设应符合下列要求：                                                                                                                                                          

  ⑴拉线坑的深度宜为1.2～1.5m；                                                                                                                                                          

  ⑵拉线与电杆的夹角不宜小于45°，当受到地形限制时不得小于30°；                                          

  ⑶终端杆的拉线及耐张杆承力拉线与线路方向应对正；分角拉线与线路分角方向应对正；防风拉线与线路方向应垂直；                                                                                                                                                          

  ⑷拉线从导线之间穿过时，应装设拉线绝缘子。拉线绝缘子距地面的高度不应小于2.5m。