ok, I decided to do a couple very rough sketches. I disregarded the description from the novel - it just didn't work for me. My idea uses a bit of the old Capitol Records building
for inspiration of the central core with a classic ring. The large ring and central hub would be largely civilian/commercial, while the lower ring would be the Navy docks. The upper regions of the central core would be housing, administration and command at the top. You can see my USS Boundless docked at one of the VIP docking ports on the administration level. For scale, the Boundless is larger than an Excelsior but small than an Ambassador class.