Selecting the appropriate rotary drilling rig model is a crucial decision in any construction project. Several key factors should guide your choice to ensure efficiency and effectiveness.
1. Pile Length and Depth:
Begin by assessing the required pile length and empty drill depth (ground elevation minus pile bottom elevation). Different models of rotary drilling rigs are equipped to handle varying pile lengths. Ensure that the selected rig can accommodate the specific length of drill pipes needed for your project.
2. Pile Diameter:
Pile diameter plays a significant role in determining the suitable drilling rig model. Smaller pile diameters are well-suited for standard geological conditions, offering flexibility and fuel efficiency. However, as the pile diameter increases, you’ll require a rig with higher torque, axial pressure, and main pulling force. Keep in mind that the machine’s size will also need to increase accordingly.
3. Geological Conditions:
The strength of the rock and soil in your construction site affects the choice of drilling rig. Increased rock and soil strength demands higher pressure for shear breakage. To meet the requirements for both pile diameter and length, you may need a larger rig. Consider a trade-off between rock and soil strength and pile depth. Sometimes, it’s more practical to opt for a larger model or employ friction drill pipes.
4. Economic Factors:
Various economic considerations come into play when selecting a drilling rig model. Think about assembly and disassembly, transportation logistics, maintenance costs, fuel efficiency, and labor expenses. The construction costs associated with different rig models can vary significantly. Ensure your choice aligns with the project’s geotechnical and engineering parameters for cost-effectiveness.
5. Special Foundations:
In cases where special foundations like occlusions or inclined piles are required, evaluate the use of protective cylinder drivers for lowering casings. Choose a rig model based on the casing’s diameter and depth. If a drum driver can’t meet casing running requirements, consider installing a pipe rolling machine or a full rotary rig. Be attentive to factors such as machine interface compatibility, operating radius, lifting height, and other project-specific needs.
By carefully considering these factors, you can make an informed decision when selecting a hydraulic rotary drilling rig model that best suits your construction project’s requirements.
Post time: Sep-22-2023