Key points for quality inspection of pile foundation construction in mining area

        (1) Pile position inspection and acceptance

        1. The deviation of the pile position, the deviation of the pile position of the pile (pressure), the deviation of the plane and verticality of the pile, and the deviation of the inclination of the pile should meet the requirements of the regulations.
        2. When the design elevation of the pile top is the same as the construction site, or the pile position can be inspected after the pile foundation construction is completed, the acceptance inspection of the pile foundation project should be carried out after the construction is completed. Pile of Pile and elevation design elevation higher than at least 0.5m o
        (2) Bearing capacity inspection and acceptance
        1. All forms of piles are required to carry out bearing capacity tests. The foundation foundation design grade is Grade A or the geological conditions are complex, and the piles with low reliability of pile quality should be tested by the static load test method. The number of piles to be inspected shall be in accordance with the requirements of the regulations.

2. 50m 3 per pile still requires a set of specimens should remain less than 3 50m, each pile must have a set of specimens.

        (3) Inspection and acceptance of pile quality
        The quality of the pile body is sampled. The number of random inspections shall comply with the specifications. The piles with poor reliability of the piles (such as cast-in-place piles below the groundwater level) have more sampling tests; but the piles of other piles (such as the groundwater level and verified piles) should not be less than the quality of the piles. 10% of the total number of piles, and not less than 10, and each column is not less than one under the table.