What are the precautions for micro pipe jacking construction?

Precautions for micro-pipe jacking construction encompass multiple aspects, including pre-construction preparation, operational standards during construction, and post-construction quality inspection and acceptance. The following is a detailed summary of these precautions:

1. Pre-construction Preparation

Geological Survey:

Conduct a geological survey to understand the geological conditions of the construction area, including soil type, groundwater level, and rock distribution, so that appropriate construction measures can be implemented.

Staffing and Training:

Professional technicians should be stationed on site, and all personnel involved in the construction should receive safety education and operational training to ensure they are familiar with construction procedures and safety standards.

Construction Equipment Inspection:

Inspect and test-run special equipment required for construction, such as the micro-pipe jacking machine, grouting equipment, and lighting equipment, to ensure they are in good condition and meet construction requirements.

Safety Plan:

Develop a detailed safety precaution and rescue plan to address potential emergencies.

2. Operational Standards During Construction

Pipe Jacking Machine Operation:

Strictly follow operating procedures to control the direction, speed, and movement of the pipe jacking machine to avoid jams and congestion.

Grouting Technology:

Grouting is used to enhance the bearing capacity and watertightness of the soil layer. During the grouting process, appropriate slurry should be selected, and parameters such as slurry concentration and flow rate should be adjusted to ensure effective grouting.

Geological Condition Monitoring:

While the pipe jacking machine is in operation, monitor changes in geological conditions at all times and adjust the machine's speed and progress promptly to prevent road collapse and equipment damage.

Pipeline Connections:

Ensure the security and tightness of pipeline connections. During pipeline advancement, control equipment such as laser guidance systems should be used to ensure that the pipeline's axis and elevation meet design requirements.

Personnel Safety:

Construction personnel must wear protective equipment and strictly observe labor discipline. Non-mechanical personnel are prohibited from performing mechanical or electrical work.

Communication Signals and Alarms:

Clearly define communication signals and alarm methods to ensure a rapid response in emergency situations.

Protection of Underground Pipelines and Structures:

During construction, protect underground pipelines and structures to prevent damage.

III. Post-Construction Quality Inspection and Acceptance

Steel Pipe Inner Surface Inspection:

After construction, the inner surface of the steel pipe should be cleaned and inspected. Any scratches, dents, or damage should be promptly repaired or replaced.

Pipe Connection Inspection:

Carefully inspect the pipe joints to ensure they are leak-free and secure. If necessary, perform a hydrostatic test or other testing method to verify the quality of the pipe connections.

Construction Document Compilation:

After construction is completed, construction documents, including construction drawings, construction records, and quality inspection reports, should be recorded and organized to provide a basis for subsequent maintenance and repairs.

IV. Other Precautions

Environmental Protection:

During construction, attention should be paid to environmental protection and to minimize impact on the surrounding environment. After completion, the construction site should be cleaned and restored.

Construction Efficiency and Cost Control:

Rationally schedule the construction schedule to improve efficiency while strengthening cost control to ensure the economic benefits of the project.