The work pile quality control in the construction process should be taken seriously. With appropriate construction technology and quality control process closely, the possibility of damaged piles will drop to the minimum level.a. check the Bentonite mud (article 7.10 of 22 BC 257-2000)-The purpose is to ensure the drill hole is not collapsed during the drilling as well as when pouring the concrete and to check before pouring concrete wash blow.-Need for quality management solution suitable for each depth of different soil layers and have appropriate treatment measures to maintain the stability into the hole until the end of the poured concrete.-The principal parameters are often control as follows
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