Construction quality inspection of cement - soil mixing pile
The quality inspection before excavation should be carried out before the casting of the roof, including the recheck of pile strength and pile number. The strength of pile body should be measured by making cement-soil test block or drilling core. Test block production70.7x70.7x70.7mm³ Cube test, each machine class spot check2 Each pile should not be less than2The sampling point should be above the bottom of the pit1mRange and above the bottom of the soft soil pile sampling. Make each sampling point 3 Block cement soil test block. And should be underwater maintenance and measurement28dThere is no side limit of age Compressive strength. The number of cores taken by drilling shall not be less than the total pile number0.5%And no less than 3Root, root3Points, each point3 The test block. Drilling core The strength of the sample obtained should be multiplied by 1.2~1.3After the completion of drilling and coring, timely grouting is used to close the coring pores.
Standard for quality inspection of cement - soil mixing pile for biaxial mixing pile
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