Scope of application and process of core drilling rigs
The core drilling rig is a construction machine suitable for hole making operations in construction foundation projects. It is widely used in municipal construction, highway and bridge, high-rise building and other infrastructure projects, with different drilling tools, suitable for dry (short auger) or wet (rotary bucket) and rock (core drilling) drilling operations, rotary drilling. The core drilling rigs are characterised by high installed power, high output torque, high shaft pressure, flexible mobility, high construction efficiency and multi-functionality. The core drilling rig is adapted to the soil geological conditions in most areas of China and has a wide range of applications. It can basically meet the needs of bridge construction, high-rise building foundation and other projects. At present, core drilling rigs have been widely used in various bored pile projects. Therefore, it is very important to explore the construction preparation of core drilling rig and the common clear water construction techniques.
1. Analyse the geological report. Determine whether the capacity of the existing drilling rig is sufficient and whether the configuration of the drill pipe and drilling tools can meet the construction requirements.
2. Drilling method selection. According to the project requirements or stratigraphic conditions, choose the appropriate drilling method, such as dry hole, long protection pipe or mud wall protection.
3. Develop a preliminary construction organisation. A reasonable construction organisation can not only greatly improve construction efficiency, but also effectively extend the normal working cycle of the borehole and extend the service life of the drilling rig.
What are the daily maintenance and precautions for core drilling rigs? Let's take a brief look.
1. Check the main structure, structural connecting bolts, structural connecting pins, structural welds, basket structure and safety protection of the core drilling rig, especially ask qualified units to check the safety performance before entering the site, and only use it after checking that it is qualified.
2. Regularly checking the condition of various power heads, working cylinders, drill bits and drill pipes.
3. Regularly check the anti-wire rope shedding device of the hollow auger, the height on both sides, the condition of the reel wall, the number of laps of the wire rope tail on the reel and, in particular, the condition of the port for checking the brake.
4. Inspection of the electrical system of the core drilling rig. The main inspection items are: special use of electric box settings and short-circuit protection leakage protection devices, emergency power-off switches, electric box shock absorbers, work device cable fixing, lighting lines, grounding wires, etc. are strictly prohibited.
1. Analyse the geological report. Determine whether the capacity of the existing drilling rig is sufficient and whether the configuration of the drill pipe and drilling tools can meet the construction requirements.
2. Drilling method selection. According to the project requirements or stratigraphic conditions, choose the appropriate drilling method, such as dry hole, long protection pipe or mud wall protection.
3. Develop a preliminary construction organisation. A reasonable construction organisation can not only greatly improve construction efficiency, but also effectively extend the normal working cycle of the borehole and extend the service life of the drilling rig.
What are the daily maintenance and precautions for core drilling rigs? Let's take a brief look.
1. Check the main structure, structural connecting bolts, structural connecting pins, structural welds, basket structure and safety protection of the core drilling rig, especially ask qualified units to check the safety performance before entering the site, and only use it after checking that it is qualified.
2. Regularly checking the condition of various power heads, working cylinders, drill bits and drill pipes.
3. Regularly check the anti-wire rope shedding device of the hollow auger, the height on both sides, the condition of the reel wall, the number of laps of the wire rope tail on the reel and, in particular, the condition of the port for checking the brake.
4. Inspection of the electrical system of the core drilling rig. The main inspection items are: special use of electric box settings and short-circuit protection leakage protection devices, emergency power-off switches, electric box shock absorbers, work device cable fixing, lighting lines, grounding wires, etc. are strictly prohibited.