Specialist in civil engineering for tunnel design / Focused on analysis / Quantity and drafting

I am an engineer who earns a living by designing tunnels. I design a variety of projects including Turnkey, private investment, roads, railways, and waterways.
I've written articles as helpful items for design work, though I'm not sure if I have explained the content well due to my lack of writing skills.
It started out of curiosity, but writing these articles has been a great opportunity for me to reflect on and organize the projects I've been involved in.

I hope this becomes a place for communication among people from various fields and a guideline for those who are new to civil engineering design.