As a sophisticated tunnel lining type, the universal wedge-shaped segments can do a good job in the control of the axis of the shield-driven tunnel and the quality of the segment ring.

通用楔形管片作为一种较先进的隧道衬砌形式，在盾构法施工中能够较好地控制隧道掘进轴线和管片成环质量。

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The models of the cooperativephenylene ring rotation and the cooperative large segment torsion were built.

同时建立协同环旋转以及协同链段扭转的模型。

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To improve efficiency and veracity of soil sampling in testing bulk density, the cutting ring method and in situ soil tube method were combined and a multi-segment in situ soil sampler was designed.

为了提高土壤容重测定中土样采集的效率和精准性，将环刀法和原状取土管法结合，进行了分段式原状取土器的研制。

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