The mechanical characteristic of shield tunnel segments lining and its influence during construction are analyzed. Firstly

the construction loads are divided into jack thrust force

grouting force

buoyancy

shield shell press

installation load

and other loads

etc. Then

the mechanical characteristic of shield tunnel segments lining is summarized as the typical three-dimensional character

indetermination

and the innegligible character. Afterwards

the influence of the construction loads on segments lining is discussed

including the cracks

partial breakage

sealing strip falling

segments leakage

and segments dislocation. Finally

some advices to protect the shield segments during construction are presented

such as jack controlling

grouting pressure controlling

and the repeated tightening the bolts. The result shows that the analysis of the mechanical characteristic of shield tunnel segments lining and Its influence during construction is imperative

and the construction loads should be emphasized in segments designing and the correlative criferia.