The construction of place-driven piles in ground with boulders or bedrock, as well as deep excavation work, demonstrates its effectiveness in cutting and removing underground obstacles.
To safely carry out difficult all-casing deep drilling, maintaining high vertical accuracy while pushing in the casing and the reliability of the chuck device are key points. The RT series tubing equipment used in the Super Top method features a wedge-type chuck device and boasts one of the largest rotational torque and pull-out force in its class. Additionally, aiming for efficient and economical rock cutting, it is equipped with a casing pushing automatic control mechanism (B-CON mechanism) that can maintain the bit load at a constant value through "sequence control." The excellent workability and safety of the Super Top method with these features have been demonstrated through "technical review certification."
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basic information
RT-200H Tubing Device Main Unit Drilling Diameter 1,000–2,000mm Casing Pulling Force 3,450kN (352tf) Instantaneous 3,940kN (402tf) Casing Pushing Force Maximum 590kN (60tf) + Self-weight 250kN (26tf) Pushing Stroke 750mm Rotational Torque 2,950/1,740/1,010kN-m (301/177/103tf-m) Instantaneous 3,130kN-m (319tf-m) Rotational Speed 0.9/1.5/2.5min Weight 34.1ton Hydraulic Power Unit Engine Output 257kW (350PS) / 1850min Weight 7.3ton Dimensions 4,800mm × 2,105mm × 2,112mm
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Applications/Examples of results
- Bored pile construction - Underground obstacle removal work
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Company information
Our company was founded in 1958 and specializes in underground special civil engineering works such as underground continuous walls, underground obstacle removal, ground improvement, and pipeline construction. In recent years, we have expanded our business operations to include slope work and construction. There is a growing social demand for securing the natural environment, seismic reinforcement, liquefaction prevention, restoration of structures, and urban redevelopment, which have become pressing issues in recent years. In response to these social needs, we have developed seismic reinforcement and liquefaction countermeasure methods such as the "Ultra Multi-Point DP Method" and the "High Grip Grout Method." For structural restoration, we utilize our in-house developed restoration method called "Suiheikun," and for urban redevelopment, we are conducting research and development of new methods such as the "Hiro Work Kmigty Method," "Bauer Method," and "Super Top Method," aimed at underground obstacle removal. Additionally, as part of our eco-friendly initiatives, we are researching and developing methods that use bubble drilling fluid to reduce industrial waste, striving to contribute to society through high-quality construction and services. We aim to continue responding to the needs of the times by deploying a variety of specialized techniques and uniquely developed methods.