INTRODUCTION
With the continuous advancement of China's transportation infrastructure construction, tunnel projects are increasing. In tunnel construction, anchor support, as an important initial support means, is crucial to ensure the stability of tunnel surrounding rock and construction safety.
As a kind of efficient anchor construction equipment, single-arm anchor cart is gradually being widely used in tunneling field.
Working Principle and Structural Characteristics of Single Arm Anchor Trolley
1. Working Principle
Single-arm anchor cart is driven by hydraulic system, and the anchor drilling rig is mounted on the flexible mechanical arm. The operator can accurately control the extension and rotation of the arm as well as the advancement and drilling of the drilling rig through the control handle in the operation console.
During construction, the mechanical arm sends the drilling rig to a predetermined position, and then the drilling rig utilizes the rotating and impacting forces to drill the anchors into the surrounding rock to complete the anchor support operation.
2. Structural characteristics
Single-arm anchor cart is mainly composed of chassis, hydraulic system, mechanical arm, anchor drilling rig and operation table. The chassis usually adopts special off-road chassis with good maneuverability and passability, which can adapt to the complex terrain conditions in the tunnel.
The hydraulic system provides power for each component to ensure smooth and precise movements. The robotic arm has multiple joints, which can realize multi-angle and wide range of movement, and can cover the anchor construction area at different locations in the tunnel.
The anchor drilling rig, on the other hand, is characterized by high speed and high torque, which can complete the anchor drilling work quickly and efficiently.
The operation room is spacious and comfortable, equipped with all kinds of advanced control equipment, providing a good working environment for the operator and facilitating precise operation.
Third, the application advantages of single-arm anchor cart in tunnel construction
1. Improve construction efficiency
The traditional manual anchor construction method requires manual handling of the anchor drilling rig, positioning and drilling are more time-consuming.
While the single-arm anchor cart can quickly move to the designated position, the mechanical arm can quickly position the drilling rig, and the drilling speed of the drilling rig is fast, which greatly shortens the construction time of each anchor.
For example, in a medium-length tunnel construction, the use of single-arm anchor cart can increase the construction efficiency at least 3 - 5 times than manual construction, effectively accelerating the tunnel construction progress.
2. Quality Assurance
Through precise hydraulic control and mechanical positioning, the single-arm anchor cart can ensure that the drilling angle, depth and spacing of the anchors meet the design requirements.
Compared with manual construction, its construction quality is more stable and reliable. For example, in the control of the drilling angle of the anchor, manual construction may have a large deviation,
while the single-arm anchor cart can control the deviation within a very small range, so that the anchor can better play the role of support and protect the stability of the tunnel surrounding rock.
3. Enhance construction safety
Tunnel construction environment is complex, there are landslides, falling rocks and other safety hazards. Single-arm anchor cart enables the operator to operate in a relatively safe cab, away from the dangerous construction area.
At the same time, the equipment has perfect safety protection devices, such as overload protection, emergency braking, etc., which further reduces the safety risks in the construction process.
Conclusion
With its many advantages such as high efficiency, high quality and safety, the single-arm anchor cart has a broad application prospect in the field of tunneling.
With the continuous progress of technology, the single-arm anchor cart will be more intelligent and automated, providing stronger support for China's tunnel construction and promoting tunnel construction technology to a new level.
