Which rotary drilling rig is good? Let's take a look at the advantages of rotary drilling rig construction.
1) The entire drilling rig is placed on an automatic walking urban belt chassis. Strong maneuverability and fast displacement. Strong independence, no need for lifting during construction and transportation. It can adapt to harsh terrain and all lifting operations can be handled by local lifting equipment.
2) The walking and movement of the drilling rig are completed by the built-in diesel engine output power, without the need for on-site high-power power supply, saving a lot of power distribution and capacity.
3) The verticality of the borehole is high. The drilling rig chassis can be extended and leveled automatically, and the instrument displays the verticality and drilling depth of the drilling rig. The drilling is very stable, ensuring the verticality of the drilling and improving the quality of the drilling.
4) The pore forming speed is fast. The drill rod of the rotary drilling rig is connected to the drill bit by traction, which is lifted and rapidly rotated to unload soil under the pressure of the oil cylinder, greatly improving the drilling efficiency. The pore formation time is generally 3-5 hours per pore. However, during construction, relevant supporting work should be fully considered. Such as the placement of steel cages, underwater concrete pouring, etc. If the supporting work is not in place, the advantages of the rotary drilling rig for fast drilling will not be fully utilized.
5) Strong geological adaptability. The connection between the drill bit and the drill rod is fixed with steel pins, and the drill bit is easy to disassemble, allowing for quick replacement of the drill bit for different geological formations. There are three main types of drill bits, namely short spiral drill bits and sand digging drill bits.
6) It can improve the bearing capacity of cast-in-place piles. During the drilling process, the rotary drilling rig only requires static pressure mud to protect the wall, and the mud used will not form a thick mud skin on the hole wall. Additionally. The drill bit repeatedly moves up and down, making the hole wall rough and increasing the lateral friction resistance of the pile. In addition, rotating the drill bit can form a flat bottomed hole, which is conducive to the exertion of pile end resistance.
7) Beneficial for environmental protection. During the construction process, the rotary drilling rig has low noise, minimal vibration, and low mud consumption. This machine only uses mud wall protection and does not require mud slag discharge. So drilling fluid has low fluidity and can be stored centrally or transported out by dump trucks.
Then choose which rotary drilling rig to use based on your actual working conditions.
The use of small rotary drilling machines:
(1) Slope protection piles for various buildings;
(2) Partial load-bearing structural piles of buildings;
(3) Various piles with a diameter less than 1m in urban renovation and municipal engineering;
(4) Suitable piles for other purposes. The market workload coverage rate of small computers is over 30%.
Market positioning of medium-sized rotary drilling rigs;
(1) Bridge piles for various transportation facilities and bridges such as highways and railways;
(2) Load bearing structural piles for large buildings and port terminals;
(3) Urban elevated bridge piers;
(4) Other applicable piles. The workload coverage rate of the medium-sized computer market has reached over 90%.
Scope of application for large rotary drilling rigs:
(1) Extra large bridge piles for various highways and railway bridges;
(2) Special structural load-bearing foundation piles for other large buildings. The market workload of mainframes accounts for over 10%.
