If we can accurately ensure the rigidity coefficient , the result of mathematic analysis method can approach the fact accurately by applying contact mechanics theory , we can deal with the lining and lining as contact problem of two bodies . using pretension bolted solid finite element simulate bolt at linings . thus not only considers perpendicular rigidity but also considers the tangent contact rigidity ( 4 )通過運用接觸力學的理論,將管片與管片的接頭抽象成為兩個體與體的接觸問題,在管片處的螺栓采用有限元中的實體螺栓預緊單元進行模擬,這樣不但考慮了管片與管片處的法向剛度接觸而且考慮了管片與管片間的切向接觸剛度。