Below are the authors and their affiliations for this study from Turkey. It is an interesting one, as it mentions the infamous T26 tunnel near Eskişehir on the Ankara - İstanbul high speed train line. It is famous because during the excavation, a TBM was stuck. And later they changed the method of excavation to NATM.

I understand, I am not allowed to copy here the abstract etc as per group rules. They are all in the article which is an Open Access one

Candan Gökçeoğlu 1,* , Ebu Bekir Aygar 2, Hakan A. Nefeslioğlu 3 , Servet Karahan 4 and Suat Güllü 4
1 Department of Geological Engineering, Hacettepe University, Beytepe, Ankara 06800, Türkiye
2 Fugro Sial Geosciences Consulting Engineering Co., Çankaya, Ankara 06680, Türkiye
3 Institute of Earth and Space Sciences, Eskişehir Technical University, Tepebasi, Eskisehir 26555, Türkiye
4 TCDD, General Directorate of Turkish Railway System, Altındağ, Ankara 06050, Türkiye
* Correspondence: cgokce@hacettepe.edu.tr or candan.gokceoglu@gmail.com; Tel.: +90-5324730851

https://www.mdpi.com/2412-3811/7/11/155