Malaysia SJW-60 Dual Rotary Spray Stopping Water

2026-04-09 08:23:53 超级管理员 Engineering Case 173 views

Location: Malaysia

Drill Model: SJW-60

Drilling Configuration: 89 triple screw drill rods

Geological Conditions: 0-4 meters backfilled (sandstone layer), 4-21 meters mud layer, 21-22 meters gravel layer.

Drilling Angle (°): 90

Drill Bit Diameter (mm): 1000

Drill Depth (m): 22

Construction Efficiency (h): 1.5

Pure Drilling Time (h): 0.08

Pure Disassembly Drill Time (h): 0.08

SJW-60 triple screw drill working at Malaysia construction site

SJW-60 drill operating with cement silos at Malaysia site

Triple screw drilling rig working on sandstone and mud layer

Construction Method:

1. Adjust the machine to reach the borehole location, ensuring that the bottom of the machine is at the end of the last track (confirming the stability of the machine after completing the borehole).

2. Assemble a 24-meter drill rod and drill to a depth of 22 meters.

3. Use a level to align the drill head's front and back with the left and right sides to 90°.

4. Drill at a speed of 20 r/min, water pressure of 15 MPa, and air pressure of 0.75 MPa for the first 4 meters due to the backfilled soil layer, taking care not to exceed the recommended pressure while elevating the drill rod to ensure verticality at the drill bit's entrance.

5. Continue drilling until the desired depth is reached, paying attention to the borehole's return gas and grout conditions, especially for the first borehole.

6. Elevate the drill rod: grout pressure 25 Pa, air pressure 0.75 MPa (320 kg of cement per meter). Drill speed: 15 r/min. Elevating speed: 13 cm/min.

7. Simultaneously elevate the drill rod and wash the outside of the drill pipe with water to clean it.

8. Finally, lift the borehole an additional 500 mm.

9. Personnel configuration: operator 1, front and back coordination personnel 1, control room staff 1. The backend is fully automated.