What machinery is used to drill bored piles?
Bored cast-in-place piles are a common foundation construction technology in construction projects and are widely used in bridges, high-rise buildings, water conservancy projects and other fields. Choosing the right machinery and equipment is crucial to construction efficiency and quality. This article will combine the hot topics and hot content on the Internet in the past 10 days to introduce in detail the commonly used mechanical equipment and characteristics of bored piles.
1. Classification of commonly used mechanical equipment for bored piles
According to different construction techniques and geological conditions, commonly used mechanical equipment for bored piles can be divided into the following categories:
| Device type | Applicable scenarios | Advantages and Disadvantages |
|---|---|---|
| Rotary drilling rig | Clay, sand, pebble layer, etc. | High efficiency and good hole forming quality, but the equipment cost is high |
| Impact drill | Hard rock, gravel layer | Strong penetrating power, but noisy and low efficiency |
| Rotary drilling rig | Soft soil, sand layer | Simple operation, but poor adaptability to hard formations |
| Long auger drilling rig | clay, silt | The hole forming speed is fast, but the pile diameter is limited |
| Reverse circulation drilling rig | Large diameter deep hole | The slag discharge effect is good, but the equipment is complicated |
2. Key factors in the selection of mechanical equipment
When selecting bored pile machinery and equipment, the following factors need to be considered:
| factors | Description |
|---|---|
| geological conditions | Different strata need to be matched with different drilling rig types (for example, impact drills are preferred for hard rock) |
| Pile diameter and depth | Large diameter deep holes require reverse circulation or rotary drilling rigs |
| Construction efficiency | Rotary drilling rigs are the most efficient and suitable for projects with tight schedules |
| Environmental requirements | Urban construction requires low-noise equipment (such as rotary drilling rigs) |
| cost budget | Impact drilling rigs are low-cost, but their efficiency is limited |
3. Recommendations for recent popular machinery and equipment
According to the industry hot spots in the past 10 days, the following equipment has attracted much attention:
| Device model | brand | Popular reasons |
|---|---|---|
| XR280E rotary drilling rig | Sany Heavy Industry | Intelligent operation, adaptable to complex formations |
| JK580 impact drilling rig | XCMG | Energy-saving design, penetration increased by 20% |
| ZR200 long spiral drilling rig | Zoomlion | Modular design, convenient transportation |
4. Construction cases and precautions
A high-speed railway bridge project uses a rotary drilling rig to complete cast-in-place piles with a diameter of 1.5m and a depth of 50m. An average of 3 holes are drilled per day, which is highly efficient. Note:
1.Mud configuration: The specific gravity of the wall protection mud needs to be adjusted according to the stratum;
2.Verticality control: Use laser inclinometer for real-time monitoring;
3.Environmental protection measures: Set up a mud circulation system to reduce pollution.
5. Future development trends
Industry data shows that intelligence and greening are the development directions of drilling rigs. For example:
- Application of 5G remote control technology;
- Electric drills reduce carbon emissions;
- Digital twin technology optimizes construction parameters.
Summary: Bored cast-in-place pile machinery needs to be scientifically selected based on engineering needs. Rotary drilling rigs are still the current mainstream, but impact drills and reverse circulation drilling rigs are irreplaceable in specific scenarios. It is recommended to make comprehensive decisions based on project budget, construction period and environmental protection requirements.
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