I have a project for combined sewer outflows to design a concrete drop shaft. The idea is to construct a concrete slurry diaphragm wall below grade subject to external water and soil pressures. The wall will be subject to ring compression. What section of ACI is used for strength design per owner requirements. Is it section 10 or 14 for walls to determine nominal compressive capacity? The shaft is 60 feet in diameter and about 60 feet deep.
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