What should we pay attention to during the micro pipe jacking construction process?

Microtunneling is a trenchless technique used for underground pipeline installation, enabling installation in confined spaces. During construction, special attention must be paid to the following aspects to ensure construction quality, equipment safety, and efficiency:

1. Pre-construction Preparation

Construction Planning and Design:

Detailed Planning: Develop a detailed construction plan that clearly defines the scope, timeline, budget, and relevant technical requirements.

Design Review: Ensure that the construction design complies with actual geological and environmental conditions, and pass design review and approval.

Equipment Inspection and Commissioning:

Equipment Inspection: Inspect the microtunnel jacking machine and its auxiliary equipment (such as the propulsion system, receiving system, and pipe assembly tools) to ensure proper function.

Trial Run: Conduct a trial run before formal construction to verify that all equipment functions are functioning properly and are adjusted to optimal conditions.

Site Preparation:

Site Survey: Investigate the construction site to understand the underground geological conditions, pipeline routes, and surrounding environment.

Infrastructure: Ensure that the construction equipment infrastructure (such as the wellhead and working platform) is stable and meets design requirements.

2. Construction Process

Pipe Jacking Machine Operation:

Equipment Alignment: Ensure the starting position and angle of the pipe jacking machine are accurate to ensure the correct direction and inclination of the pipe.

Advance Control: Control the advancement speed and pressure of the pipe jacking machine to avoid excessive advancement that could disturb the soil or damage the equipment.

Soil Management:

Soil Stabilization: Implement appropriate soil stabilization measures based on soil type and geological conditions to prevent soil collapse or holes.

Slurry Treatment: If slurry is used as the pipe jacking medium, ensure the slurry mix and treatment meet the requirements to avoid clogging or contamination.

Pipeline Installation:

Pipeline Jointing: Ensure that the joints between pipeline segments are leak-free. Use appropriate connection methods and sealing materials.

Pipeline Inspection: During and after pipe laying, inspect the pipeline to ensure that its dimensions, straightness, and sealing meet design standards.

Construction Safety:

Personnel Safety: Ensure that all construction personnel wear appropriate personal protective equipment (PPE) and are familiar with construction safety procedures.

Equipment Safety: Regularly inspect and maintain construction equipment to ensure safe operation and avoid malfunctions or accidents.

3. Quality Control

Monitoring and Inspection:

Real-time Monitoring: Monitor key parameters such as equipment operating status, propulsion force, and pipeline position during construction.

Quality Inspection: Perform quality inspections on pipelines after construction, including their geometry, load-bearing capacity, and sealing.

Problem Handling:

Problem Identification: Promptly identify and address problems that arise during construction, such as equipment failures and poor pipeline connections.

Recording and Improvement: Record problems and solutions, summarize the construction process, and provide improvement suggestions.

4. Post-Construction Processing

Cleanup and Restoration:

Site Cleanup: Clean the construction site, restore the surrounding environment, and dispose of waste and debris.

Equipment Maintenance: Clean and maintain equipment to ensure it is ready for the next use.

Acceptance and Reporting:

Acceptance Inspection: Inspect the completed pipeline to ensure it meets design requirements and quality standards.

Construction Report: Prepare a detailed construction report covering the construction process, any problems encountered, any measures taken, and any results.

5. Environmental and Legal Compliance

Environmental Measures:

Noise and Waste Management: Control noise and waste generated during construction and comply with environmental regulations.

Soil and Water Conservation: Implement measures to prevent pollution of surrounding water bodies and soil during construction.

Laws and Regulations:

Compliance Operations: Ensure that the construction process complies with local laws, regulations, and standards, and obtain necessary permits and approvals.