In this lecture, Si will share some experience related to the structural design of underground concrete structures, often encountered in London area geology. The presentation will cover a seemingly insignificant but commonly seen issue in shaft design – the selection of geometry for the shaft base slab, flat and domed, each with its pros and cons.
This will expand into several related technical topics including:
- how cracking affects the design of underground concrete structures
- water resistance design of underground structures
- shrinkage, creep and early-age thermal behaviour of concrete.
- The lecture will summarise how these characteristics of concrete influence the selection of base slab geometry.