excavation with pipe

Hello everyone, 

I'm working a model of sandy soil where an underground pipe exits. an excavation was made and a shoring system consisting of soldier beams, walers and timber lagging was installed on different stages. The pipe is made from FRP material and has water in it. The excavation extends to 1 m below the pipe where deflection is expected. only problem is when showing results the pipe seems to move up with the up heave of the soil. Also, I'm not able to assign both internal pressure of the pipe and weight of the fluid(water) at the same time, thus I've used two different phases for that.

If anyone knows how to solve either one of the two problems I would be very thankful 

Thank you