Static drilling grounding pile foundation technology is a new patented construction technology, which is called static drilling grounding pretensioned prestressed concrete bamboo pile (hereinafter referred to as static drilling grounding bamboo pile). Compared with the traditional construction method, its novelty lies in the construction method of burying precast pile in the pile hole by using the self-weight of the pile body after drilling, which has the advantages of both the embedded construction method and the factory production of precast pile, adopts the method of grouting at the pile end and around the pile, and carries out the bottom expansion treatment on the pile end, and has the advantages of mixing pile and bottom expansion pile. It is a new technology which combines the advantages of various construction methods.
For reference (Zhejiang Standard Atlas 20 12 Zhejiang G37).
Advantages of static bored pile:
When this type of pile is adopted, due to the pile sinking technology of pre-drilling and pile bottom grouting, its construction method has good adaptability to geotechnical layer, little influence on soil squeezing effect, less mud discharge, less noise and less overall influence on environmental pollution.
Construction process of static bored pile;
The specific process of static drilling and grounding pile construction is as follows:
(1) drill positioning, drill hole.
(2) Drill, finish machining and hole protection.
③ ④ After drilling to the bearing stratum, open the expanding wing for reaming.
⑤ Inject solidified cement slurry into the pile end and stir.
⑥ Fold the enlarged flange, lift the drill pipe, and inject solidified cement slurry into the pile body at the same time.
⑦ Pile sinking to the design elevation.