鉆孔灌注樁安全技術交底.doc

1、鉆孔機械就位后，應對鉆機及配套設備進行全面檢查。鉆機安設必須平穩、牢固；鉆架應加設斜撐或纜風繩。
2、沖擊鉆孔，選用的鉆錐、卷揚機和鋼絲繩等，應配置適當，鋼絲繩與鉆錐用繩卡固接時，繩卡數量應與鋼絲繩直徑相匹配。沖擊過程中，鋼絲繩的松弛度應掌握適宜。
3、正、反循環鉆機及潛水鉆機使用的電纜線要定期檢查，接頭必須綁扎牢固，確保不透水、不漏電；對經常處于水、泥漿浸泡處應架空搭設。挪移鉆機時，不得擠壓電纜線及風水管路。
4、潛水鉆機鉆孔時，一般在完成一根鉆孔樁時要檢查一次電機的封閉狀況。鉆進速度應根據地質變化加以控制，以保證安全運轉。
5、采用沖抓或沖擊鉆孔當鉆頭提到接近護筒底緣時，應減速、平穩提升，不得碰撞護筒和鉤掛護筒底緣。
6、鉆孔使用的泥漿，宜設置泥漿循環凈化系統，并注意防止或減少環境污染。
7、鉆機停鉆，必須將鉆頭提出孔外，置于鉆架上，不得滯留孔內。
8、對于已埋設護筒未開鉆或已成樁護筒尚未拔除的，應加設護筒頂蓋或鋪設安全網遮罩。
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.

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