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Tunnel unsymmetrical pressure shallow buried section cover excavation subsection out-of-tunnel arch protection structure and construction method
The tunnel unsymmetrical pressure shallow buried section cover excavation segmented out-of-hole arch protection structure comprises an arch protection body and a free section supporting arch, the free section supporting arch is provided with a plurality of profile steel arch frames at intervals along the free face of a tunnel, and a plurality of longitudinal connecting ribs are evenly welded to the tops of the profile steel arch frames. Reinforcing meshes are integrally laid on the longitudinal connecting ribs, pipe sheds are drilled into pipe shed guide holes in the protective arch body, a plurality of feet-lock bolts are fixed to an arch crown of the protective arch body, a backfill layer is integrally poured on the outer portion of the arch crown of the protective arch body, a planting soil layer is laid on a side slope at the upper end of the backfill layer, and the outer portion of the planting soil layer is provided with a soil layer. And a bias wall foundation is built at the bottom of the backfill layer. According to the tunnel unsymmetrical pressure shallow buried section cover excavation subsection out-of-hole arch protection structure, the stability and construction safety of an unsymmetrical pressure side slope are effectively improved, collapse and instability caused by the fact that the slope is too high are avoided, and the construction risks of unsymmetrical pressure, collapse and roof fall of shallow buried section construction are greatly reduced.
本发明公开了隧道偏压浅埋段盖挖分段出洞护拱结构及施工工法，包括护拱主体和临空段支护拱，所述临空段支护拱沿隧道的临空面间隔设置多个型钢拱架，所述型钢拱架的顶部均匀焊接有若干个纵向连接筋，所述纵向连接筋上整体铺设有钢筋网片，所述护拱主体内部的管棚导向孔钻入有管棚，且所述护拱主体的拱顶固定有若干个锁脚锚杆，并且所述护拱主体的拱顶外部整体浇筑有回填层，所述回填层的上端的边坡铺设有种植土层，所述回填层的底部修筑有偏压墙基础。该隧道偏压浅埋段盖挖分段出洞护拱结构有效提高偏压侧边坡的稳定性和施工安全，避免因边坡过高而滑塌失稳，极大的降低了浅埋段施工偏压、坍塌、冒顶的施工风险。
Tunnel unsymmetrical pressure shallow buried section cover excavation subsection out-of-tunnel arch protection structure and construction method
The tunnel unsymmetrical pressure shallow buried section cover excavation segmented out-of-hole arch protection structure comprises an arch protection body and a free section supporting arch, the free section supporting arch is provided with a plurality of profile steel arch frames at intervals along the free face of a tunnel, and a plurality of longitudinal connecting ribs are evenly welded to the tops of the profile steel arch frames. Reinforcing meshes are integrally laid on the longitudinal connecting ribs, pipe sheds are drilled into pipe shed guide holes in the protective arch body, a plurality of feet-lock bolts are fixed to an arch crown of the protective arch body, a backfill layer is integrally poured on the outer portion of the arch crown of the protective arch body, a planting soil layer is laid on a side slope at the upper end of the backfill layer, and the outer portion of the planting soil layer is provided with a soil layer. And a bias wall foundation is built at the bottom of the backfill layer. According to the tunnel unsymmetrical pressure shallow buried section cover excavation subsection out-of-hole arch protection structure, the stability and construction safety of an unsymmetrical pressure side slope are effectively improved, collapse and instability caused by the fact that the slope is too high are avoided, and the construction risks of unsymmetrical pressure, collapse and roof fall of shallow buried section construction are greatly reduced.
本发明公开了隧道偏压浅埋段盖挖分段出洞护拱结构及施工工法，包括护拱主体和临空段支护拱，所述临空段支护拱沿隧道的临空面间隔设置多个型钢拱架，所述型钢拱架的顶部均匀焊接有若干个纵向连接筋，所述纵向连接筋上整体铺设有钢筋网片，所述护拱主体内部的管棚导向孔钻入有管棚，且所述护拱主体的拱顶固定有若干个锁脚锚杆，并且所述护拱主体的拱顶外部整体浇筑有回填层，所述回填层的上端的边坡铺设有种植土层，所述回填层的底部修筑有偏压墙基础。该隧道偏压浅埋段盖挖分段出洞护拱结构有效提高偏压侧边坡的稳定性和施工安全，避免因边坡过高而滑塌失稳，极大的降低了浅埋段施工偏压、坍塌、冒顶的施工风险。
Tunnel unsymmetrical pressure shallow buried section cover excavation subsection out-of-tunnel arch protection structure and construction method
隧道偏压浅埋段盖挖分段出洞护拱结构及施工工法
LIAO QIAOLING (author) / KUANG CHAO (author) / LI WANWEI (author) / FENG DONGGE (author) / HUANG XIANBIN (author) / SU HUANQUAN (author) / LI WEN (author) / QING ZHIGANG (author) / LI XIUWANG (author) / LAN YUSHENG (author)
2023-07-07
Patent
Electronic Resource
Chinese
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