I am a civil engineer and would like to do a study on the design and construction of launching platforms for large lift vehicles, one example of which is the ELA 3 (Ariane Launch Area 3) in French Guyana, a near equatorial location particularly useful for launching heavy payloads to geostationary orbit.
Obviously a lot of geotechnical engineering goes into the design of a launch platform to ensure that it is robust against both the rocket exhaust and vibrations during normal launches and any potential anomaly (explosions or "fast fires").
I would like to know if there is a structural launchpad design available on the internet, drawings, dimensions, and possibly even some calculations. Based on this, and using information already widely available on rockets, I would do some modeling and study both the thermal and dynamic behaviors that the reinforced concrete is subjected to. So I need the structural design of the platform or information with the structure dimensions.