用于隧道洞口的门式复合管棚套拱结构及其施工方法技术

本发明专利技术公开了一种用于隧道洞口的门式复合管棚套拱结构及其施工方法，该结构包括位于隧道洞口顶部的管棚套拱和位于洞口两侧的预加固桩，管棚套拱与预加固桩相连接且由预加固桩支承；预加固桩的顶端固接有顶盖梁，顶盖梁与管棚套拱间填充有袋装回填土。施工方法为：先在洞口两侧开挖、浇注预加固桩，并在桩内预埋连接套管；然后开挖管棚套拱断面，并保留核心土；再在连接套管中插入连接钢筋，同时浇注管棚套拱，使其与预加固桩固接成一整体，同时在该管棚套拱内预留管棚套管，设置长管棚；最后在管棚套拱上方填充袋装回填土，并浇注顶盖梁，完成施工。本发明专利技术的门式复合管棚套拱结构更加稳定，力学性能较好，能有效防止隧道洞口坍塌和边、仰坡滑移。

Door type composite pipe shed arch structure for tunnel portal and construction method thereof

The invention discloses a method for tunnel entrance door type composite pipe roof arch structure and its construction method, including pipe roof arch and the two sides of the entrance is located in the top of the tunnel is located in the pre reinforcement of the pile structure, pipe roof arch and reinforcement pile connected by pre reinforced pile supported pre reinforced pile; the top is fixedly connected with the top beam, the top beam and pipe roof arch is filled between the bag back fill. The construction method is as follows: first, the two sides in the excavation and reinforcement pouring pile, the pile embedded in the connecting sleeve; and the excavation of pipe roof arch section, and retain the core soil; then in the connection sleeve is inserted into the connecting bar, at the same time pouring pipe roof arch, the pre reinforced pile is fixedly connected into a whole at the same time, the pipe roof arch reserved casing pipe shed, set the long pipe shed; at the end of pipe roof arch above the filling bag backfill, and pouring the top beam, the completion of the construction. The door type composite pipe canopy arch structure of the invention is more stable and has better mechanical performance, and can effectively prevent the collapse of the tunnel entrance and the sliding of the side and the slope.

【技术实现步骤摘要】

【技术保护点】
一种用于隧道洞口的门式复合管棚套拱结构，其特征在于：所述门式复合管棚套拱结构包括位于隧道洞口顶部的管棚套拱和位于隧道洞口两侧的预加固桩，所述管棚套拱的两端分别与两侧的预加固桩相连接，且该管棚套拱由预加固桩支承；预加固桩的顶端固接有顶盖梁，所述顶盖梁与所述管棚套拱间填充有袋装回填土。

【技术特征摘要】

【专利技术属性】
技术研发人员：易震宇，蒋正华，傅立新，张进华，刘正刚，蒋胜波，王明明，刘永胜，施成华，李林林，侯兴杰，
申请(专利权)人：湖南省交通规划勘察设计院，
类型：发明
国别省市：43