A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Small-clear-distance tunnel structure of tunnel portal bias section and construction method of small-clear-distance tunnel structure
The small-clear-distance tunnel structure comprises a right-line tunnel and a left-line tunnel, the distance between the right-line tunnel and the left-line tunnel is gradually increased from the portal to the inside, the right-line tunnel is divided into a right-line tunnel section A and a right-line tunnel section B from the portal to the inside, rock-soil bodies between the tunnels are interlaid rocks, and the left-line tunnel section A and the right-line tunnel section B are interlaid rocks. An opposite-pulling anchor rod is arranged in the middle clamping rock between the right line tunnel A section and the left line tunnel, a cantilever pile is arranged on the inner side of the right line tunnel A section, and the cantilever pile is tightly attached to the lining wall of the right line tunnel A section. Wherein the right-line tunnel section A is constructed by adopting an open excavation method, the right-line tunnel section B and the left-line tunnel are constructed by adopting an underground excavation method, the right-line tunnel section A is firstly excavated, then the right-line tunnel section B is excavated, and finally the left-line tunnel is excavated. According to the method, rapid construction of the small-clear-distance tunnel in the portal bias section can be achieved, the distance of the small-clear-distance tunnel is further compressed, construction of the ultra-small-clear-distance tunnel is achieved, and in addition, compared with a traditional side and upward slope cutting and tunnel entering mode, the method is safer, and the construction efficiency is higher.
本发明公开了一种洞口偏压段小净距隧道结构及施工方法，包含右线隧道和左线隧道，右线隧道和左线隧道由洞口处向内间距逐渐增大，右线隧道由洞口向内分为右线隧道A段和右线隧道B段，隧道之间的岩土体为中夹岩，右线隧道A段与左线隧道之间的中夹岩内设置有对拉锚杆，右线隧道A段内侧设置有悬臂桩，悬臂桩紧贴右线隧道A段的内衬墙设置。其中右线隧道A段采用明挖法施工，右线隧道B段和左线隧道采用暗挖法施工，先开挖右线隧道A段，再开挖右线隧道B段，最后开挖左线隧道。本发明可以实现洞口偏压段小净距隧道的快速施工，并进一步压缩小净距隧道间距，实现超小净距隧道施工，此外相对于传统的边仰坡削坡进洞方式更加安全，施工效率更高。
Small-clear-distance tunnel structure of tunnel portal bias section and construction method of small-clear-distance tunnel structure
The small-clear-distance tunnel structure comprises a right-line tunnel and a left-line tunnel, the distance between the right-line tunnel and the left-line tunnel is gradually increased from the portal to the inside, the right-line tunnel is divided into a right-line tunnel section A and a right-line tunnel section B from the portal to the inside, rock-soil bodies between the tunnels are interlaid rocks, and the left-line tunnel section A and the right-line tunnel section B are interlaid rocks. An opposite-pulling anchor rod is arranged in the middle clamping rock between the right line tunnel A section and the left line tunnel, a cantilever pile is arranged on the inner side of the right line tunnel A section, and the cantilever pile is tightly attached to the lining wall of the right line tunnel A section. Wherein the right-line tunnel section A is constructed by adopting an open excavation method, the right-line tunnel section B and the left-line tunnel are constructed by adopting an underground excavation method, the right-line tunnel section A is firstly excavated, then the right-line tunnel section B is excavated, and finally the left-line tunnel is excavated. According to the method, rapid construction of the small-clear-distance tunnel in the portal bias section can be achieved, the distance of the small-clear-distance tunnel is further compressed, construction of the ultra-small-clear-distance tunnel is achieved, and in addition, compared with a traditional side and upward slope cutting and tunnel entering mode, the method is safer, and the construction efficiency is higher.
本发明公开了一种洞口偏压段小净距隧道结构及施工方法，包含右线隧道和左线隧道，右线隧道和左线隧道由洞口处向内间距逐渐增大，右线隧道由洞口向内分为右线隧道A段和右线隧道B段，隧道之间的岩土体为中夹岩，右线隧道A段与左线隧道之间的中夹岩内设置有对拉锚杆，右线隧道A段内侧设置有悬臂桩，悬臂桩紧贴右线隧道A段的内衬墙设置。其中右线隧道A段采用明挖法施工，右线隧道B段和左线隧道采用暗挖法施工，先开挖右线隧道A段，再开挖右线隧道B段，最后开挖左线隧道。本发明可以实现洞口偏压段小净距隧道的快速施工，并进一步压缩小净距隧道间距，实现超小净距隧道施工，此外相对于传统的边仰坡削坡进洞方式更加安全，施工效率更高。
Small-clear-distance tunnel structure of tunnel portal bias section and construction method of small-clear-distance tunnel structure
一种洞口偏压段小净距隧道结构及施工方法
LIU YI (author) / LIU BIN (author) / ZHANG TAO (author) / CAO SHIJIANG (author) / LIU XU (author)
2024-08-06
Patent
Electronic Resource
Chinese
| European Patent Office | 2023
| European Patent Office | 2024
Anti-interference construction method for small-clear-distance bridge and tunnel combined structure
| European Patent Office | 2024
Rapid construction method for open-cut variable-cross-section small-clear-distance tunnel group
| European Patent Office | 2024