Definition of stability ferro-concrete pipes for microtonneling in a massif of breeds

P. Shcolnikov, V. Shcolnikov

Calculations of a microtunnel on act of a body weight of soil, act of loadings on a tunnel from a surface of land and act of axial force from jacks stations are resulted. Also calculation of sampling of cross-section of armature for a steel carcase of a pressed through reinforced- concrete pipe is resulted and quantities intermediate jack stations.