Hello friends. This paper is not very recent. It is from 2015. But it is valuable information. It gives results of evaluating the member force of the segment lining of the virtual submarine tunnel and calculation of the optimal segment thickness by water depth and the change of member force according to the load formula.

from Proceedings of the Korean Tunnelling and Underground Space Association.

https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/45990