What are the advantages and workflow of the tunnel arch grab car in tunnel construction? The advantages of the arch grab car in tunnel construction are mainly reflected in the following aspects:
1. Improve construction efficiency:
Quick installation: Through automated mechanical operation, the arch grab car can quickly place the arch in the designated position, significantly reducing the time required for manual installation.
Continuous operation: Compared with traditional manual installation, the arch grab car can achieve continuous operation without frequent shutdowns, thereby improving overall construction efficiency.
2. Enhance construction safety:
Reducing personnel contact: The use of the arch grab car can reduce the direct contact of workers with heavy objects and reduce the risk of accidents caused by improper operation or physical overdraft.
Precise operation: The accuracy of mechanical operation is higher than that of manual operation, which helps to avoid structural damage or collapse risks caused by positioning deviation.
3. Reduce labor intensity:
Reducing physical burden: The handling and installation of the arch is usually very heavy. The use of the arch grab car can greatly reduce the physical burden of workers and reduce health problems caused by long-term high-intensity labor.
4. Improve construction quality:
Precise support: The position and angle of the arch frame are precisely controlled by machinery to ensure the stability and reliability of the tunnel support structure, thereby improving the construction quality.
Consistency: Mechanical operation can maintain consistent construction standards and reduce the differences in construction quality caused by human factors.
5. Economic benefits:
Reduced working hours: Although the initial investment is high, in the long run, the arch frame grab car can reduce the construction period and reduce labor costs, thereby improving economic benefits.
Maintenance cost: Compared with manual operation, the maintenance cost of machinery is relatively low and the service life is longer.
The workflow of the tunnel arch frame grab car generally includes the following steps:
1. Preparation stage:
Inspect the equipment: Before starting work, conduct a comprehensive inspection of the arch frame grab car to ensure that all parts are working properly and there is no damage or wear.
Set parameters: Set the working parameters of the lifting mechanism and telescopic arm according to the size and weight of the arch frame.
2. Positioning and installation:
Move to position: Move the arch frame grab car to the tunnel position where the arch frame needs to be installed.
Raise the arch: Use the lifting mechanism to raise the arch vertically to the appropriate height.
Positioning: Move the arch to the designated installation position through the telescopic arm.
3. Install the arch:
Fix the arch: Use the gripper or other installation tools to fix the arch in the predetermined position.
Adjust the position: Ensure that the arch is positioned accurately and aligned with the surrounding structure.
4. Remove the arch:
Release the gripper: When removing the old arch, first release the gripper to separate the arch from the supporting structure.
Lower the arch: Use the lifting mechanism to slowly lower the arch to the ground or the designated position.
5. Subsequent processing:
Clean up the site: After the removal, clean up the site and remove the waste materials and tools.
Inspect the equipment: Check the status of the arch grab car again to ensure that there is no damage and prepare for the next use.
In summary, the application of the arch grab car in tunnel construction can effectively improve construction efficiency and quality, reduce labor intensity and safety risks, and have good economic benefits and environmental protection performance. Safety is the most important consideration throughout the entire workflow. Operators need to comply with strict safety regulations to ensure the safety of personnel and equipment throughout the process. In addition, the workflow may be adjusted according to the actual construction situation, but the basic principle is to maintain efficiency and safety.