ABSTRACT
In mechanized tunneling, an early bedding of the recently installed segment ring is a constructive necessity and of considerable importance for the durability of the whole structure. Alongside the actual material technology of the grout, procedural aspects like advance rate of the tunnel boring machine, therefore the interacting parameters like grout volume per unit of time and gelation and hardening of the grout also play an important role for a successful injection process. Due to adjustments of the grout composition during the construction the flow properties before and especially after activation will change. In order to observe the flow behavior and the interactions between the grout and soil a large-scale test setup was developed to simulate the annular gap grouting under realistic boundary conditions. Herein, it is possible to observe the flow behavior and to examine the material for its homogeneity and strength characteristics after grouting.
