Running drainage pipe under concrete slab

[flanagaj]

I need to route a rain water drainage pipe under the concrete slab.  As you can see from the image there is only about 150mm clearance from the top of the pipe to the underside of the concrete slab (red line)  Part H indicates that I need to encase the whole pipe in concrete, but I didn’t find it very clear and wondered if anyone can provide any further guidance on how I should do this.  I also wonder whether I should change the pipe for socketed?