Influence of a new building construction on sewer tunnel lining durability

An analytical method for the determination of the stress state of sewer tunnel linings and evaluation of a decrease of their bearing capacity and durability due to concrete gas corrosion has been developed in the framework of the project supported by INTAS grant 01-647. The method allows the actions of the soil own weight and weight of buildings or structures both existing on the surface before the tunnel driving and erected nearby the already constructed tunnel, to be taken into account and may be also applied for planning the location of new buildings with respect to the tunnel, thus reducing the negative consequences on tunnel durability. The paper presented describes some results of investigations on sewer tunnel lining durability depending on building sizes and their location with respect to the tunnel at different relations between deformation moduli of the soil or rock and the lining material.