1, the pile-forming quality inspection of cast-in-place pile mainly includes the quality inspection of three processes: hole forming and hole cleaning, fabrication and placement of reinforcing cage, concrete mixing and pouring.
1) The quality and measurement of raw materials, concrete mixture ratio, slump and concrete strength grade shall be checked during concrete mixing;
2) The specification, covered electrode, variety, joint specification, weld length, weld appearance and quality, as well as the manufacturing deviation of main reinforcement and stirrup of reinforcing cage should be checked.
3) Before pouring concrete, carefully check the center position, hole depth, aperture, verticality, sediment thickness at the bottom of the hole and the actual position of the reinforcing cage in strict accordance with the construction quality requirements in Chapter VI, and fill in the corresponding quality inspection records.
2. The quality inspection of precast piles and steel piles mainly includes pile making, driving (static pressure) depth, hammer stop standard, pile position and verticality inspection;
1) Precast piles shall be made according to the selected standard drawings or design drawings, and the deviation shall meet the requirements;
2) The inspection items during pile sinking shall include the number of blows per meter, the last blow 1m, the penetration of the last three rows, the elevation of pile tip, the verticality of pile body (frame), etc.
3. The quality inspection of the above-mentioned cast-in-place piles and cast-in-place piles and other construction procedures shall be carried out according to the relevant items in Article 1 and Article 2.
4. Pile quality inspection should be carried out for pile foundations of first-class buildings and pile foundation projects with complex geological conditions or low reliability of pile quality. The detection method can be reliable dynamic detection method, and for large diameter piles, the ultrasonic detection method of drilling core and burying pipe can also be used. The number of tests is determined by the design according to the specific situation.
5. The pile position deviation should be checked according to different pile types.
The above is an introduction to the general terms of pile quality inspection provided by Zhong Da Consulting Company for construction personnel. For more knowledge of architectural terminology, please pay attention to the architectural knowledge column of Zhong Da Consulting.
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