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Anti-rockfall structure for joint of bridge and open cut tunnel portal
An open cut tunnel structure of the open cut tunnel type tunnel portal is connected with a bridge abutment of the bridge, a concrete body with the thickness of 1.8-2.5 m is poured upwards on the outer side of an open cut tunnel at the open cut tunnel structure end close to a steep cliff, two guardrails of the bridge are connected with the open cut tunnel structure, and the open cut tunnel structure is connected with the steep cliff. A flexible shed tunnel with the length of 30-50 m is erected between the two guardrails at the open cut tunnel structure end and the concrete body, one end of the flexible shed tunnel is connected to the outer side of the concrete body in the annular direction, and the two sides of the flexible shed tunnel are connected to the two guardrails correspondingly. According to the structure, the flexible shed tunnel is connected between the two guardrails and the concrete body, and the flexible shed tunnel protects most of the dangerous rock mass above the connecting part of the open cut tunnel and the bridge tunnel of the open cut tunnel structure from rolling onto the flexible shed tunnel and does not make contact with the open cut tunnel structure and the bridge to damage the open cut tunnel structure and the bridge; the impact resistance of the tunnel open cut tunnel structure and the bridge at the bridge-tunnel connection position under the steep wall condition is improved, implementation of the rockfall prevention structure is not limited by site and topographic conditions, the manufacturing cost is low, and construction is easy.
本发明公开了一种桥梁与明洞式隧道洞门相接部位防落石结构，明洞式隧道洞门的明洞结构与桥梁的桥台相接，临近陡崖的明洞结构端的明洞外侧环向上浇筑有厚1.8‑2.5米的混凝土体，桥梁的两护栏与明洞结构相接，明洞结构端两护栏与混凝土体间架设有长30‑50米的柔性棚洞，柔性棚洞一端连接在混凝土体外侧环向上、两侧分别连接在两护栏上；该结构实现在两护栏与混凝土体间连接柔性棚洞，且柔性棚洞防护大部分明洞结构的明洞，桥隧相接部位上方危岩体滚落到柔性棚洞上而不会与明洞结构、桥梁接触损坏明洞结构和桥梁，提高了陡壁条件下桥隧相接位置隧道明洞结构和桥梁的抗冲击能力，该防落石结构实施不受场地和地形条件限制，造价低、施工容易。
Anti-rockfall structure for joint of bridge and open cut tunnel portal
An open cut tunnel structure of the open cut tunnel type tunnel portal is connected with a bridge abutment of the bridge, a concrete body with the thickness of 1.8-2.5 m is poured upwards on the outer side of an open cut tunnel at the open cut tunnel structure end close to a steep cliff, two guardrails of the bridge are connected with the open cut tunnel structure, and the open cut tunnel structure is connected with the steep cliff. A flexible shed tunnel with the length of 30-50 m is erected between the two guardrails at the open cut tunnel structure end and the concrete body, one end of the flexible shed tunnel is connected to the outer side of the concrete body in the annular direction, and the two sides of the flexible shed tunnel are connected to the two guardrails correspondingly. According to the structure, the flexible shed tunnel is connected between the two guardrails and the concrete body, and the flexible shed tunnel protects most of the dangerous rock mass above the connecting part of the open cut tunnel and the bridge tunnel of the open cut tunnel structure from rolling onto the flexible shed tunnel and does not make contact with the open cut tunnel structure and the bridge to damage the open cut tunnel structure and the bridge; the impact resistance of the tunnel open cut tunnel structure and the bridge at the bridge-tunnel connection position under the steep wall condition is improved, implementation of the rockfall prevention structure is not limited by site and topographic conditions, the manufacturing cost is low, and construction is easy.
本发明公开了一种桥梁与明洞式隧道洞门相接部位防落石结构，明洞式隧道洞门的明洞结构与桥梁的桥台相接，临近陡崖的明洞结构端的明洞外侧环向上浇筑有厚1.8‑2.5米的混凝土体，桥梁的两护栏与明洞结构相接，明洞结构端两护栏与混凝土体间架设有长30‑50米的柔性棚洞，柔性棚洞一端连接在混凝土体外侧环向上、两侧分别连接在两护栏上；该结构实现在两护栏与混凝土体间连接柔性棚洞，且柔性棚洞防护大部分明洞结构的明洞，桥隧相接部位上方危岩体滚落到柔性棚洞上而不会与明洞结构、桥梁接触损坏明洞结构和桥梁，提高了陡壁条件下桥隧相接位置隧道明洞结构和桥梁的抗冲击能力，该防落石结构实施不受场地和地形条件限制，造价低、施工容易。
Anti-rockfall structure for joint of bridge and open cut tunnel portal
桥梁与明洞式隧道洞门相接部位防落石结构
ZHOU LI (author) / GOU DEMING (author) / ZHANG ANRUI (author) / YANG HONG (author) / LIU XIAOYONG (author) / CHOI HYUN (author) / HU QIANG (author)
2023-04-25
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
/
E01F
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
,
Zusätzliche Baumaßnahmen, wie die Ausstattung von Straßen oder die bauliche Ausbildung von Bahnsteigen, Landeplätzen für Hubschrauber, Wegweisern, Schneezäunen oder dgl.
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