| Along with the advance of the urbanization process, cities are growing demand for Metro. In practical subway engineering, shield is being wildly used as a safe, economized and rapid method for subway construction. Generally shield lining is composed of segments, their mechanical characteristics are related to selection of model of calculation, which leads to different results, moreover lack of experimental data to check the results. Shield segments are in a corrosive environment for long-term, a doubt is whether it is durable enough to stand for a century or more. Due to two of the problem mentioned above, a research is made on segments mechanical characteristics and durability, which is base on Subway line 1 of SuZhou, the main topics of this thesis are as follows:(1)Some of the models are introduced besides loading calculation method.(2)Experiment was carried out to analysis the internal forces of shield lining with the method of measuring the strain of reinforcement bar and concrete.(3)FEM was made to analyze segment internal force using ANSYS, with three-dimensional shell-joint model. Shield lining is simulated by shell element, both the bolt and contact of segment are made as spring, Elastic ground was considered as another kind of spring which could only bear compressing.(4) Influencing factors on durability were analyzed, which computed the life span in every single factor, finally the durability life was forecasted in the way of fuzzy comprehensive judgment.
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