Lifting injections under filigree tunnel shells for the construction of the 2nd Munich S-Bahn main line

Site plan 2nd SBSS Munich and stop Marienhof

Stop Marienhof- W/O - Cut and problem definition

Injection concept

Influence of the lifting injections at different distances to the tunnel 2D-FE calculations (deformation IuI)

-->Development of an injection concept

Step 1: Lifting at a great distance from the tunnel (Case 1, vertical ovalization)

Step 2: Lifting injections laterally and below the tunnel (case 2 and 3, horizontal ovalization)

Step 3: Repeat steps 1 and 2



--> Gradual lifting of the tunnel

With the help of the developed injection concept, the successful raising of the tunnel tube could be simulated in laboratory tests.