Surveying work is one of the important tasks in the mechanical construction project of channel forming machine and the eyes of construction personnel. Through many years of work practice, it is realized that surveying supervision should do the following things well in the quality control of construction project:

The primary control network is the overall control framework of the water conservancy and Hydropower project, and it is the key to the overall layout and construction of the project. According to the current construction process of water resources and Hydropower projects, the unit usually submits the design information to the owner, at the same time, it submits the primary control network for the overall construction project. The primary control network will be provided to the construction unit by the owner or the supervisory unit entrusted by the owner when the project is tendered and constructed on site, so as to ensure the construction of the project. The consistency of work and design and the consistency of measurement datum of each construction section.

After the start of the project, each construction unit first reviews the primary control network according to the corresponding sub-projects, and submits the results of the re-examination to the owner or the owner's authorized supervision and audit, which conforms to the corresponding accuracy in the construction specifications of water conservancy and Hydropower projects, and then returns to the construction unit for use. If the unit's review of the results of the primary control network fails to meet the corresponding accuracy in the construction specifications for water and Hydropower projects, the supervision entrusted by the owner or the owner of the project shall promptly request the design and survey unit to review the results of the corresponding measures in the survey specifications for water and Hydropower projects, and then the construction unit shall review the results accorded with the corresponding measures in the survey specifications for water and Hydropower projects. Check, report to survey supervisor for examination and return to construction unit.

Because the primary control network is the overall control of the project, the point density can not meet the specific construction requirements, so according to the geographical location of the On-site construction precautions of U-shaped groove moulding machine.

building, the corresponding local construction control network should be set up, and the point accuracy of the construction control network should be checked regularly, the problems found and timely supplementary testing should be carried out, and the record of the results should be sent back to the owner or the owner's committee. Supervisory audit and filing. The auditing methods of Surveying Supervision are generally field sampling auditing and internal auditing.

In order to ensure the accuracy of U-type hydraulic machinery construction lofting, some key parts of the survey must be supervised by engineers to participate in the side stations, and submitted to the supervision department for sampling inspection, before the follow-up construction can be carried out. For example, the opening of the tunnel, the intersection of the branch tunnel and the main tunnel, the turning point and the key point of the main tunnel, and the accuracy of the lofting of the dam axis point. Its accuracy is related to the accuracy of subsequent lofting quality.