Jet grout drilling machine is a soil treatment technique that involves injecting high-pressure grout into the ground to create a series of columns, or soilcrete, which serve as reinforcement for soil structures. This technique is renowned for its versatility, allowing it to be employed on various soil types and in different environmental conditions. The machine’s primary function is to facilitate the controlled placement and mixing of grout within the soil, leading to a stabilized and improved substrate ready for construction activities. With expanding urban development and the increasing complexity of modern construction projects, the importance of robust soil stabilization cannot be overstated.
Jet Grout Drilling Machine Parameters
| Torque | 7500 N.m | Moving head speed | 0-170r/min |
| Stroke | 3400mm | Lifting force | 70kN |
| Feeding force | 36kN | Drilling depth | 130-170m |
| Drill Pipe Diameter | 50-250 mm | Drilling angle | 0~90° |
| Power | 55 Kw+18.5Kw | Weight | 5900 kg |
| Horizontal movement | 900mm | Hydraulic Working Pressure | 20 MPa |
| Gradeability | 25° | Walking speed | 1km/h |
| Other functions | Added lift/built-in gripper | ||
| Overall dimensions (L * W * H) | Construction dimension 3550×2200×5650mm | ||
| Transport dimension 5600×2200×2100mm | |||
Wide Applications of Jet Grout Drilling Machine
- Construction: For foundation stabilization, basement excavation, and underpinning existing structures.
- Tunneling and Underground Construction: To reinforce soil around tunnels, preventing collapse and ensuring worker safety.
- Environmental Engineering: For groundwater containment, landfill lining, and soil remediation.
- Mining: To stabilize slopes and prevent landslides in open-pit mines.
- Infrastructure: In the construction of bridges, dams, and retaining walls.
Choosing Jet Grout Drilling Equipment Guide
Selecting the appropriate jet grout drilling machine is crucial for project success. Consider the following factors when making your decision:
- Project Requirements: Assess the soil conditions, column diameter, and depth required for your project.
- Machine Specifications: Look for machines with the necessary drilling depth, grout pressure, and rotation speed capabilities.
- Mobility: Determine whether a crawler-mounted, truck-mounted, or mast-mounted system is best suited for your job site.
- Operator Comfort and Safety: Features like ergonomic cabs, safety alarms, and vibration damping systems enhance operator experience and safety.
Jet Grout Drilling Operational Workflow
- Site Preparation: Clearing the work area, establishing access routes, setting up support zones for materials (cement, water) and spoil handling. Precise location marking for each grout column.
- Machine Setup: Positioning the Jet Grout Drilling Machine accurately over the marked location. Leveling the rig for stability. Connecting high-pressure hoses from the pump and grout lines from the mixing plant. Connecting power/fuel sources. Pre-operational checks.
- Drilling Phase: The rotary head drives the drill string with the drill bit down to the predetermined starting depth for jetting. Drilling fluids (water, air, or mud) may be used to stabilize the borehole and flush cuttings, depending on soil conditions. Drilling data like rotation speed, feed rate, and flush pressure are monitored.
- Initiation of Jetting: Once the target depth is reached, drilling stops. The high-pressure pump is engaged, supplying grout at the specified pressure through the drill string to the monitor nozzles.
- Jetting & Column Formation: The critical phase begins. The Jet Grout Drilling Machine commences a slow, controlled withdrawal of the drill string while simultaneously rotating it.
