Recommended Emergency Plan for Quality Accidents of Bored Piles

Even if thorough preparations are made during the construction of bored piles, quality accidents may still occur suddenly due to complex geological conditions, equipment malfunctions and other factors. When operating a rotary drilling rig, it is crucial to formulate a scientific emergency plan. The following are six targeted recommendation plans.

1.Emergency response to hole collapse: Once a hole collapse is detected, immediately stop the rotary drilling rig from drilling. Quickly replenish high-quality mud into the hole to increase its specific gravity and viscosity. If the hole collapse is severe, backfill it with clay or cement. After it stabilizes, re-drill the hole.

2. Handling of stuck drill: When encountering a stuck drill, first try to gently lift and slowly rotate the drill pipe. If this is ineffective, you can use auxiliary equipment such as a hydraulic jack and use high-pressure water jet to loosen it. Do not forcibly lift it out to avoid breaking the drill pipe.

3. Dealing with broken piles: In case of broken piles, depending on the location of the broken piles, shallow broken piles can be excavated and cleared, and then re-poured. For deep broken piles, the grouting reinforcement method is adopted, and high-strength cement slurry is injected through pre-buried pipelines for reinforcement.

4. Deviation correction: When deviation of the borehole is detected, after analyzing the cause, if it is a geological issue, backfill the rubble to 0.5-1 meter above the deviation point and then re-drill. If there is a problem with the drilling rig, adjust its levelness and verticality in a timely manner.

5. Emergency repair of equipment failure: In case of sudden failure of the rotary drilling rig, immediately activate the backup equipment to replace and continue the construction. At the same time, organize professional maintenance personnel to quickly identify the fault, prioritize the repair of key components, and shorten the downtime.

6. Personnel safety Assurance: In the event of an accident, immediately evacuate all irrelevant personnel at the scene, set up warning signs, provide emergency treatment to the injured and send them to the hospital, and prioritize the safety of construction workers.

In conclusion, when it comes to quality accidents of bored piles, rapid response, precise judgment and scientific handling are the keys. These six emergency plans are formulated based on the construction characteristics of rotary drilling RIGS, which can effectively reduce accident losses and ensure the quality of the project and construction safety.