The key points of quality control are: thickness, flatness, concrete strength, bending resistance and inspection of manhole cover;

The key points of quality control and supervision measures are:

1. Flatness, concrete strength, flexural strength, manhole cover shall be connected with the road surface to prevent the manhole cover from sinking. Therefore, the supervisor first supervises the contractor to ensure the smoothness quality of subgrade, especially subgrade, and requires that the construction team responsible for the concrete pavement of this project must be a professional team, and it is forbidden for the contractor to temporarily piece together the concrete construction team in this project.

2. Review the construction plan prepared by the construction unit, and the supervisor will discuss the plan and put forward opinions and suggestions. The plan was implemented after being approved by the chief supervision engineer. In addition to reviewing the concrete pavement construction plan prepared by the contractor and holding a special meeting for discussion, the road quality recently completed by the contractor should also be investigated.

3. The configuration of the model and quantity of construction machines and tools is the key factor to ensure the construction quality. The supervisor will check whether the construction machinery configuration of the construction unit is reasonable and can meet the construction requirements. The contractor is required to equip concrete vibrating and roughening machinery with satisfactory performance and quantity, and carry out the construction according to the approved concrete pouring process and pouring sequence.

4. The supervisor will strictly control the mixture ratio of concrete. If the requirements of the supervisor cannot be met, the contractor is required to carry out concrete pavement construction. The supervisor will closely monitor the concrete entering the site, spot check the slump and appearance quality, and all raw materials that do not meet the requirements will be removed.

5. In order to ensure that the flexural-tensile strength and flatness are qualified after concrete pouring, our supervision department will require the construction unit to formulate an operational implementation plan for the test section, and the supervision engineer will participate in the implementation of the test section to obtain accurate construction process parameters for guiding large-scale construction. According to the concrete pouring progress, the construction unit should reasonably arrange the number of materials and machinery to enter the site, and ensure enough vibrating time to ensure the smoothness and flexural strength of concrete to meet the design requirements.

6. Require the contractor to formulate reliable measures to ensure the continuity of concrete pouring operation. During the construction of concrete pavement, the contractor must spread, vibrate, survive, trim and maintain health in strict accordance with the specified technology. The contractor is required to do a good job of protection when working on concrete pavement to prevent non-construction vehicles from breaking into the working area.

7. The supervision engineer shall observe and inspect the whole process of concrete pavement pouring, and require the quality inspection personnel of the construction unit to conduct self-inspection. If it is found that it does not meet the requirements in the process, the construction unit shall be required to adjust it in time until it meets the requirements. Under the supervision of the supervisor, the field testers shall conduct sampling inspection, sampling and witness test at the specified frequency.

8. The supervisor will evaluate the qualification, technology and performance of concrete raw material manufacturers together with the owner to ensure the quality of raw material supply. The supervisor will carefully check the position, elevation and construction quality of inspection wells and rain outlets on the road to ensure their stability in concrete construction and the thickness of concrete structure.

9. Control the joints of concrete pavement: longitudinal joints, transverse joints (expansion joints and contraction joints) and construction joints.

The above contents are compiled according to the problems encountered by the students in their actual work for reference. If in doubt, please communicate and correct in time.