Key Points of Daily Maintenance and Care for Rotary Drilling Rigs: Extend Equipment Lifespan and Reduce Construction Failures

    As the core load-bearing foundation of the superstructure, high-speed rail bridge pile foundations impose stringent requirements on construction precision, hole-forming quality, and construction efficiency. Rotary drilling rigs, with their advantages of high efficiency, environmental friendliness, and stable hole-forming quality, have become the preferred equipment for high-speed rail bridge pile foundation construction. The rationality of their selection and the level of efficiency control directly impact the construction period, project cost, and structural safety of the pile foundations, necessitating precise control in accordance with the characteristics of high-speed rail construction.

    For the selection of rotary drilling rigs for high-speed rail bridge pile foundations, the core focus must be on three key elements: "pile foundation parameters - stratum conditions - construction standards," avoiding blind selection.  First, based on pile foundation design parameters, for conventional high-speed rail piles with diameters of 1.2-2.5m and depths of 30-80m, priority should be given to 280-360-type rotary drilling rigs, balancing borehole accuracy and construction efficiency. If the pile depth exceeds 80m or the diameter surpasses 2.5m, a 400-type or higher torque drilling rig should be selected to ensure stable power output.  Second, adapt to the construction stratum. For soft layers such as soft soil and sand layers, friction drill rods can be used to improve drilling efficiency. For complex strata containing moderately weathered or slightly weathered bedrock or dense gravel layers, drilling rigs equipped with machine-lock drill rods should be selected to enhance rock-breaking capability and force transmission efficiency.  Additionally, environmental and noise reduction requirements for high-speed rail construction must be considered, opting for low-emission and low-noise models to avoid impacting the surrounding environment and ensuring compliance with construction standards.

    Proper daily maintenance of rotary drilling rigs is crucial for extending equipment lifespan, reducing failure rates, and ensuring continuous construction of high-speed rail pile foundations. Regular maintenance should prioritize prevention, with a focus on inspecting the power system, hydraulic system, drill rods and tools, and traveling mechanisms. Before and after construction, promptly clean mud and debris from drill rods, drill bits, and lifting tools, checking for wear, deformation, and cracks. Address any issues promptly through repair or replacement to avoid operational failures such as breakage or drill jamming.  The hydraulic system requires periodic checks of oil levels, cleanliness, and pipeline sealing, along with timely oil and filter replacements to prevent internal leakage and power loss due to contaminants. Key components like the engine, power head, and slewing mechanism must have their oils (engine oil and gear oil) replaced according to scheduled intervals to ensure proper lubrication, normal heat dissipation, and reduced risks from high temperatures and wear. Electrical wiring, steel cables, and tracks should also undergo regular inspections to guarantee secure connections and stable operation, minimizing downtime from repairs.  Standardized maintenance not only enhances equipment reliability but also effectively improves hole-forming efficiency and construction safety. Only by integrating selection, maintenance, operation, and on-site management can rotary drilling rigs function stably in high-speed rail bridge pile foundation projects, providing robust support for high-quality, high-efficiency project advancement.