I need a reinforced concrete cantilever wall type, and a ramp surrounds it

I need a reinforced concrete cantilever wall type, and a ramp surrounds it. The ramp goes from floor level 0 meters to 4 meters..15 meters. The reinforced concrete wall must go to the center and around the wall that goes up the ramp so that it is embedded in the wall. It is the wall and around the wall, being a supporting wall, the ramp goes up like a snail.. The wall that is more slender and the snail type but square with right angles. And it has a height of 4.15 meters. The wall must be slender, less width. And the snail effect of the ramp should be at a right angle, not circular but square.. Muro less width, and that at level 4.15 meters que vaya hacia una puerta de una empresa. It is a ramp for disabled people with a railing and everything necessary for universal accessibility.. The width of the ramp is 1.5 meters