Case Study: River Diversion for Hydroelectric Dam Construction Using Rotary Drilling Rigs

Hydroelectric dam construction often requires river diversions to create dry working conditions and ensure efficient resource management. This case study demonstrates how the XCMG Used Rotary Drilling Rig and SANY Used Rotary Drilling Rig were deployed in a river diversion project, overcoming technical and environmental challenges.

Project Overview: Hydroelectric Dam River Diversion

The project involved diverting a river to construct a hydroelectric dam. The diversion aimed to reroute the river temporarily while maintaining water flow and protecting nearby ecosystems.

Challenges in River Diversion Projects

  • Complex Geological Conditions: The project site featured a mix of rocky and sandy soils, demanding versatile drilling solutions.
  • Environmental Constraints: Aquatic habitats and water quality needed to be preserved.
  • High Flow Rates: The river's strong currents posed logistical challenges for diversion.

Role of XCMG Used Rotary Drilling Rig

The XCMG Used Rotary Drilling Rig was instrumental in stabilizing riverbanks and drilling boreholes for cofferdams. Key contributions included:

  • High Torque Drilling: Successfully penetrated rocky and mixed soil layers.
  • Compact Frame: Operated effectively in narrow and challenging locations.
  • Real-Time Monitoring: Ensured precision in drilling depth and alignment.

Role of SANY Used Rotary Drilling Rig

The SANY Used Rotary Drilling Rig played a crucial role in maintaining borehole integrity and managing sediment. Key advantages included:

  • Lightweight Design: Reduced stress on temporary platforms over the river.
  • Advanced Fluid Management: Controlled sediment displacement and water flow.

Techniques Employed

1. Geological Surveys

  • Soil and rock analyses determined optimal drilling strategies.
  • Rigs were positioned to minimize environmental disruption.

2. Cofferdam Installation

  • The XCMG Used Rotary Drilling Rig drilled boreholes to anchor cofferdam walls, creating a dry workspace.
  • Casing systems reinforced boreholes in unstable soils.

3. Sediment Control and Water Flow Management

  • The SANY Used Rotary Drilling Rig managed fluid circulation, preventing sediment dispersion.
  • Water barriers were installed to direct the river flow through the diversion channel.

Outcomes

  • Structural Stability: Boreholes drilled by the XCMG Used Rotary Drilling Rig provided secure anchoring for cofferdams.
  • Environmental Compliance: Measures ensured minimal disruption to aquatic habitats.
  • On-Time Completion: The river diversion was completed within the planned timeline, allowing dam construction to proceed.

Lessons Learned

  • The combination of XCMG Used Rotary Drilling Rig and SANY Used Rotary Drilling Rig enhanced efficiency and accuracy in challenging conditions.
  • Comprehensive planning and advanced sediment control are vital for minimizing environmental impact.

Conclusion

Rotary drilling rigs like the XCMG Used Rotary Drilling Rig and SANY Used Rotary Drilling Rig are indispensable for river diversion projects in hydroelectric dam construction. Their adaptability and precision ensure structural stability, environmental sustainability, and operational efficiency, making them essential tools for large-scale infrastructure projects.

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