Mars Base Bidron

I have been thinking about this base as soon as I learned of the contest. The main questions I wanted to answer were: how do you protect from the martian environment (temperature shifts, radiation, winds, micrometeorites), and how do you do that with existing resources? By resources, I mostly mean water. Or to be more specific, the absolute absence of any sort of liquid binder.

The solution that made the most sense to me was putting something underground. This would provide much needed insula