组合式盾构的特点是能自行推进，可不用装配式衬砌管片，而采用现浇钢筋混凝土衬砌。
Composite shield is characterized by self - driving and cast in site reinforced concrete lining instead of segmental lining.
盾构法施工中长期采用的钢筋混凝土管片存在一些固有缺点。
The reinforce concrete segment used in shield tunnel has some inherent shortcomings.
钢筋混凝土管片作为盾构隧道最基本的结构单元，其承载力影响管片环的整体性能。
RC segments are the basic structure units in shield tunnel, and their bearing capacity influences the segment rings integral performance.
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