A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Extrusion large-deformation tunnel foam concrete yielding support structure and construction method
The invention relates to an extrusion large-deformation tunnel foam concrete yielding support structure and a construction method. The structure comprises pre-linings constructed on the inner side ofthe arch portion of a foundation in the longitudinal direction, and the ends of the adjacent pre-linings are staggered and in lap joint and are fixed and supported through arch frames. An arch wall secondary lining is arranged on the inner sides of the pre-linings. An inverted arch primary support and an inverted arch mold building layer which are in corresponding ring joint with the pre-linings and the arch wall secondary lining are sequentially constructed on the inner side of the surrounding rock inverted arch portion. The pre-linings and/or the inverted arch primary support are/is formed by pouring concrete filled with foam and steel fibers. The structure is suitable for tunnel construction under the conditions of large deformation, long surrounding rock deformation time and the like,crustal stress can be transferred to the deep portions of surrounding rock so as to be released, the tunnel is located in a relatively low stress environment, the problem that in an existing tunnel, under extrusion large deformation, due to too large surrounding rock deformation, the lining structure is destroyed can be solved easily, and tunnel safety performance can be improved easily; and construction is simple, convenience and practicable.
本发明涉及一种挤压大变形隧道泡沫混凝土让压支护结构及施工方法，包括沿纵向构筑于基础拱部内侧的预衬砌，所述相邻预衬砌的端部交错搭接并通过拱架固定支撑；所述预衬砌内侧设置有拱墙二衬；围岩仰拱部内侧依次构筑有与预衬砌和拱墙二衬分别对应环拼接的仰拱初支和仰拱模筑层；所述预衬砌或/和仰拱初支采用填充有泡沫和钢纤维的混凝土浇筑成型；本发明适用于大变形量、围岩变形时间长等情况下的隧道施工，能够将地应力向围岩深部转移以释放地应力，使隧道处于一个相对较低的应力环境，利于解决现有隧道在挤压大变形下因围岩变形过大对衬砌结构造成破坏的问题，利于提高隧道安全性能；且施工简便可行。
Extrusion large-deformation tunnel foam concrete yielding support structure and construction method
The invention relates to an extrusion large-deformation tunnel foam concrete yielding support structure and a construction method. The structure comprises pre-linings constructed on the inner side ofthe arch portion of a foundation in the longitudinal direction, and the ends of the adjacent pre-linings are staggered and in lap joint and are fixed and supported through arch frames. An arch wall secondary lining is arranged on the inner sides of the pre-linings. An inverted arch primary support and an inverted arch mold building layer which are in corresponding ring joint with the pre-linings and the arch wall secondary lining are sequentially constructed on the inner side of the surrounding rock inverted arch portion. The pre-linings and/or the inverted arch primary support are/is formed by pouring concrete filled with foam and steel fibers. The structure is suitable for tunnel construction under the conditions of large deformation, long surrounding rock deformation time and the like,crustal stress can be transferred to the deep portions of surrounding rock so as to be released, the tunnel is located in a relatively low stress environment, the problem that in an existing tunnel, under extrusion large deformation, due to too large surrounding rock deformation, the lining structure is destroyed can be solved easily, and tunnel safety performance can be improved easily; and construction is simple, convenience and practicable.
本发明涉及一种挤压大变形隧道泡沫混凝土让压支护结构及施工方法，包括沿纵向构筑于基础拱部内侧的预衬砌，所述相邻预衬砌的端部交错搭接并通过拱架固定支撑；所述预衬砌内侧设置有拱墙二衬；围岩仰拱部内侧依次构筑有与预衬砌和拱墙二衬分别对应环拼接的仰拱初支和仰拱模筑层；所述预衬砌或/和仰拱初支采用填充有泡沫和钢纤维的混凝土浇筑成型；本发明适用于大变形量、围岩变形时间长等情况下的隧道施工，能够将地应力向围岩深部转移以释放地应力，使隧道处于一个相对较低的应力环境，利于解决现有隧道在挤压大变形下因围岩变形过大对衬砌结构造成破坏的问题，利于提高隧道安全性能；且施工简便可行。
Extrusion large-deformation tunnel foam concrete yielding support structure and construction method
挤压大变形隧道泡沫混凝土让压支护结构及施工方法
HUANG FENG (author) / FENG HU (author) / LIU XINGCHEN (author) / ZHENG AICHEN (author) / HE ZHAOYI (author) / TENG WEI (author) / ZHANG BAN (author) / QU MIAODI (author)
2020-06-19
Patent
Electronic Resource
Chinese
Construction method of open cut tunnel extension foam concrete backfill structure
| European Patent Office | 2021
| European Patent Office | 2021
| European Patent Office | 2021