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CN104895122B 一种盾构隧道的施工方法 有权

一种盾构隧道的施工方法
摘要：
一种盾构隧道的施工方法，包括：间隔施工抗拔桩；在待掘进的盾构隧道顶部上表面上施工地层加固层；在地层加固层上浇筑垫层，在浇筑垫层上施工横向设置的承台，将抗拔桩内的钢筋锚入承台中，地层加固层将承台、抗拔桩和待掘进的盾构隧道连成一体，承台为横向长条形梁，相邻两承台的间距D为20～40m，确定间距D的方法为：算出盾构隧道纵向的剩余上浮力；建立盾构隧道纵向等效刚度连续梁模型；调整间距D对计算模型进行试算，直至满足盾构隧道管片衬砌张开量不超过8mm、环间错位不超过15mm、螺栓的抗剪和抗拉强度未超过设计值、衬砌结构满足强度和变形要求；盾构隧道掘进通过承台和抗拔桩拼装隧道管片；盾构隧道掘进中或贯通后，施工内部结构。
摘要（英）：

The invention discloses a continuous beam type anti-floating structure of a shield tunnel. The continuous beam type anti-floating structure comprises a plurality of pile caps arranged longitudinally along the shield tunnel at intervals, the pile caps are transversely arranged above the shield tunnel, an uplift pile used for fixing is arranged below each pile cap, and a stratum reinforcing layer used for integrally connecting the pile caps, the uplift piles and the shield tunnel is arranged between the lower surface of the pile caps and the top surface of the shield tunnel. The continuous beam type anti-floating structure is applicable to the shield tunnel.

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