Internal forces analysis on non-axially symmetrically pipe slices with different rigidities in the joint for the shield tunnel

摘要

In this paper, the formulas for calculating the internal forces of non-axially symmetrically distributed shield tunnel pipe slices with different rigidities in their joints are inferred. The slices of the circular pipe are supposed to elastically hinged. Several cases are calculated by using the formulas, in the case that the joints have different rigidities, the values of moment at the top and bottom of the tunnel are 10%～45% and 7%～40% greater than that in the case that the joints have equal rigidities. But the variation of axial force is very little. With the decrease of rigidities in the joints, the variation of moments increases. All these should be considered in the structure design.