Where Exactly Is The Rotary Drilling Rig 'Excellent'? A Full Analysis of Its Core Advantages

When it comes to 'piling experts' in construction engineering, the rotary excavator is definitely an indispensable piece of equipment. Perhaps some newcomers might ask: Isn't it just drilling a hole and pouring a pile? Can't ordinary drills do that too? Why is the rotary excavator always the first choice? In fact, its 'excellence' lies in its solid performance. Even people who have never been involved in engineering can instantly understand after seeing these core advantages.

First and most obviously, its construction efficiency is astonishingly high. A conventional rotary drilling rig might take 4-6 hours to drill a pile with a diameter of 1.2 meters and a depth of 20 meters; if it encounters slightly harder soil layers, the time could double. However, the rotary excavator is different. It operates on a 'rotary cutting + direct soil retrieval' mode, much like using a spoon to scoop ice cream—soil is directly lifted out by the bucket, without the need for repeated circulation to remove cuttings. Take the common 220-type rotary excavator, for example. In ordinary clay, it can complete a pile of the same specifications in as little as 1 hour. Even when encountering soil layers mixed with gravel, it can handle the job in 2-3 hours. For engineering projects, time is money. The efficiency of a rotary excavator is roughly equivalent to that of 3-4 conventional drilling rigs, making it a 'lifesaver' when project schedules are tight.

Secondly, it has exceptional 'environmental adaptability,' capable of handling both soft soil and hard rock. Many people assume drilling rigs can only work in soft soil and must stop when encountering hard rock, but the rotary excavator comes with different types of buckets: a 'screw bucket' for ordinary soil layers, which digs as easily as twisting a screw; a 'sand bucket' for gravel layers, which securely collects gravel without missing any; and a 'rock bucket' for low-hardness rock layers, which can slowly drill into the rock依靠 the cutting force of the teeth. For instance, in municipal engineering projects, where construction sites may switch between clay and sand layers, the rotary excavator doesn't need to frequently replace equipment; it can simply adjust the bucket to continue working, unlike conventional drilling rigs that would have to halt operations when facing complex strata.

Another point that is particularly welcomed by construction teams is its labor-saving and environmental benefits. Previously, using impact drilling rigs required 2-3 people to operate in shifts, with constant monitoring of the mud pit to prevent mud overflow. However, most rotary excavators use hydraulic controls, allowing a single driver in the cab to control the lifting and rotation of the bucket via levers, significantly reducing labor intensity. Additionally, it doesn't rely on large amounts of mud for cutting removal; only a small amount of mud is needed for wall protection in special soil layers. As a result, construction sites are not covered in mud, and dust is minimized. Statistical data shows that for the same pile foundation project, the mud usage of a rotary excavator is only 1/5 to 1/10 that of a conventional rotary drilling rig, reducing subsequent mud cleanup costs and minimizing environmental impact on the surrounding area.

Lastly, its flexibility allows it to perform well even in narrow spaces. Many urban engineering projects have extremely compact construction sites, with residential buildings or existing roads nearby, making it impossible for large equipment to maneuver. However, the rotary excavator features a 'track-type undercarriage,' similar to a tank, enabling flexible turning with a minimum turning radius of as little as 5-6 meters. Its body can also be folded or adjusted in height, making it suitable for construction in basements with limited ceiling heights. For example, in old city renovation projects, where many sites can only accommodate one piece of equipment, the rotary excavator can 'squeeze in' to work, while conventional large drilling rigs cannot enter. This is why it is becoming increasingly popular in urban engineering projects.

In summary, the 'excellence' of the rotary excavator is not due to advertising but to its solid strengths: high efficiency, hardworking capability, cost savings, and flexibility. Whether building high-rise buildings, bridges, or municipal engineering projects, it can help construction teams solve many challenges.