Does it need expert argumentation to dig another 3 m foundation pit?

Need. For deep foundation pit construction exceeding 3m, it is necessary to formulate a special construction plan; For subprojects that exceed a certain scale and are risky, expert review is needed; For three meters, three meters are being dug, which needs expert argumentation. Expert argumentation system refers to a system in which experts are invited to demonstrate related affairs according to the provisions of the Government Procurement Law and other laws and regulations in order to ensure the legality, integrity, scientific rigor, objectivity and impartiality of procurement bidding documents.