For the construction of 126 pile foundations of the approach bridge of a river-crossing bridge, the Sany SR235-C10 rotary drilling rig was selected as the main equipment to solve the problems of complex geology and high groundwater level.
By adjusting parameters to adapt to different soil layers, the drilling rig increased the efficiency by nearly 3 times. 126 pile foundations were completed in 102 days, shortening the construction period by 15% and reducing the cost by 12% compared with the plan.
Finally, the proportion of Class I piles reached 98%, which confirms the efficiency and reliability of the rotary drilling rig in bridge pile foundation construction and provides a reference for similar projects. Read More

As the core equipment for pile foundation construction, rotary drilling rigs pose risks of overturning and collapse during operation. These risks not only may cause equipment damage but also directly threaten the life safety of construction personnel. Combining the risk characteristics obser Read More

     Drill jamming and hole collapse are major risks in rotary drilling rig construction. For drill jamming, handle based on causes: inject mud and reverse at low speed for hard rock, increase mud displacement and lift slowly for slag deposition, impact to detach boulders. For hole collapse, immediately lift the drill and inject high-viscosity mud; ream for minor collapse, fill with clay and gravel for deep collapse, and use modified mud with casing for quicksand. Prevention includes stratum investigation, matched mud, speed control, slag cleaning and drill bit replacement as needed. Read More

As a "powerful tool for deep holes" in foundation construction, the reliability of rotary drilling rigs is directly related to project progress and cost control. Many construction teams neglect maintenance details, leading to frequent equipment failures and a service life reduction of more than 30%. Mastering refined maintenance skills is the core key to extending the equipment's service life. Read More

In the wave of accelerated infrastructure construction and energy development, rotary drilling rigs, as the core equipment in the field of pile foundation construction, are ushering in a golden period of high-quality development. With the continuous support of policies and technological brea Read More