Nguyen TA, Nguyen MAT. Study on Tunnel Face Failure Mechanism in Two-Layer Soils . Int J Sci Res Civil Engg [Internet]. 2021 Mar. 11 [cited 2024 Oct. 18];5(2):09-16. Available from: https://ijsrce.com/index.php/home/article/view/IJSRCE21525