钻孔灌注桩安全技术交底.doc

1、钻孔机械就位后，应对钻机及配套设备进行全面检查。钻机安设必须平稳、牢固；钻架应加设斜撑或缆风绳。
2、冲击钻孔，选用的钻锥、卷扬机和钢丝绳等，应配置适当，钢丝绳与钻锥用绳卡固接时，绳卡数量应与钢丝绳直径相匹配。冲击过程中，钢丝绳的松弛度应掌握适宜。
3、正、反循环钻机及潜水钻机使用的电缆线要定期检查，接头必须绑扎牢固，确保不透水、不漏电；对经常处于水、泥浆浸泡处应架空搭设。挪移钻机时，不得挤压电缆线及风水管路。
4、潜水钻机钻孔时，一般在完成一根钻孔桩时要检查一次电机的封闭状况。钻进速度应根据地质变化加以控制，以保证安全运转。
5、采用冲抓或冲击钻孔当钻头提到接近护筒底缘时，应减速、平稳提升，不得碰撞护筒和钩挂护筒底缘。
6、钻孔使用的泥浆，宜设置泥浆循环净化系统，并注意防止或减少环境污染。
7、钻机停钻，必须将钻头提出孔外，置于钻架上，不得滞留孔内。
8、对于已埋设护筒未开钻或已成桩护筒尚未拔除的，应加设护筒顶盖或铺设安全网遮罩。
1, drilling machinery in place, should drilling rig and associated equipment to conduct a comprehensive inspection. Drill install to smooth, firm; drilling frame bracing should be added or ropes.
2, impact drilling, drilling cone selected, winches and wire rope, etc., should be configured properly, wire rope and then drill and fixed with Shengka when Shengka number should match the wire diameter. Impact process, the wire rope should have a suitable degree of relaxation.
3, is, reverse circulation drill rigs and diving cable used to be regularly checked, the joint must be strong banding to ensure waterproof, does not leak; on often in the water, the mud should be soaked in overhead erection. Diversion of drilling shall not be extruded cables and Feng Shui pipeline.
4, diving rigs drilling, generally when the completion of a bored pile a motor to check the closed position. Drilling speed should be controlled according to geological changes, to ensure safe operation.
5, with red grasp the impact of drilling when the drill bit or casing that close to the bottom edge should be slow, smooth upgrade, not crash protection tube and hook the bottom edge of casing.
6, drilling mud used, should set the mud circulation purification system, and pay attention to prevent or reduce environmental pollution.
7, stop drilling rig must be made drill hole, the place drill rack, can not stay hole.
8, has been laid for the drilling or casing does not become a pile casings not removed, the casing should be added or laying roof safety net mask.