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.
对隧洞围岩条件良好洞段，论证取消隧洞原圆形钢筋混凝土衬砌，选定马蹄形锚喷断面作为最终优化断面形式。
For tunnel sections with good surrounding rocks, the U-shaped rock-bolted section is selected as a final optimized section instead of the original circular reinforcement concrete lining section.
在石拱桥拱圈的下部进行衬砌加固，使老石拱桥拱圈与新钢筋混凝土套拱形成整体，共同受力，是一种维修加固石拱桥的简单实用的方法。
The effect method of reinforce and maintenance the stone arch bridge is to build liner around the arch bridge down area. That combines the old arch round and the new reinforced concrete together.
软弱围岩隧洞在设计上采用钢筋混凝土装配式预制构件衬砌的方式近年来越来越多，但在施工上还一直没有形成一套较完善的衬砌安装方法。
In recent years the reinforced concrete precast element linings are adopted more and more for the soft surrounding rock tunnels. But a perfect assembling method for lining is not performed yet.
某隧洞工程采用TBM施工，六边形预制钢筋混凝土管片衬砌。
One tunnel is being constructed by TBM. Its lining adopts precast concrete hexagonal segment.
泡沫混凝土层在复合衬砌结构中的最佳位置，外侧钢筋混凝土与内侧钢筋混凝土厚度比大致在1：2左右。
The optimal location of the foam concrete is obtained, and the thickness ratio of outer reinforce concrete to inner is about 1:2.
泡沫混凝土层在复合衬砌结构中的最佳位置，外侧钢筋混凝土与内侧钢筋混凝土厚度比大致在1：2左右。
The optimal location of the foam concrete is obtained, and the thickness ratio of outer reinforce concrete to inner is about 1:2.
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