Shed tunnel and shed tunnel design method

Abstract

The invention provides a shed tunnel structural body. By adoption of the shed tunnel structural body, the defects that the control effect of existing wall type, arch type, cantilever type and column type shed tunnel structures or other shed tunnel structures on high-speed and high-impact rolling stones breaking out in large-scale and grouped modes is limited, the construction cost is high, and the applicability is poor are solved. A shed tunnel is arranged between a roadbed and a mountain slope in a mountainous area, and comprises a Y-shaped frame beam. The top of the Y-shaped frame beam is connected with a downward-concave arc-shaped cover plate. The fixed side edge of the cover plate is tangent to the mountain slope, and the included angle beta between the tangent line of the top end of the free side edge of the cover plate and the horizontal plane is smaller than or equal to 45 degrees. The cover plate of the shed tunnel is of a sandwich structure which is formed by filling the space between an upper skin plate and a lower skin plate with energy dissipating materials. The invention further provides a shed tunnel design method. The shed tunnel design method is used for designing the curvature radius value R of the cover plate, the burial depth value Lp of a structural stand column of a grouted steel pipe pile of the shed tunnel, and the anchor depth values Lb of the side edges of the cover plate of the shed tunnel. According to the shed tunnel, a novel skid-jumping self-throwing removal and guide technical concept is adopted, and the shed tunnel has advantages on the aspect of preventing impact damage of high-altitude rolling stones on the slope to a road. The shed tunnel is simple in structure and high in environment adaptability.

Description

technical field [0001] The invention relates to a shed cave and a design method thereof, in particular to a structure and a design method thereof for preventing and controlling high-speed slope disasters on the inner side of mountainous roads, and belongs to the fields of disaster prevention and control in mountainous areas and road and bridge engineering. Background technique [0002] When the main road passes through the mountains and valleys, the subgrade is often cut and excavated from the more stable side of the slope, and most of them are high-level subgrades on the slope. This kind of bridge project is located in a special geological and landform environment, especially the high-speed slope rock disaster caused by the middle / high collapse, which often smashes vehicles and blocks traffic, seriously affecting economic and social development. Especially on the main traffic lines in the western mountainous area, the disaster of landslides and rolling rocks is serious, and...

AI Technical Summary

Problems solved by technology

Its technical defects are manifested in: firstly, because the rolling stones are blocked from draining down and silted up on the roof of the cave, the load borne by the roof under the action of "large-scale mass" rolling stones continues to increase, which directly reduces the structural safety

Secondly, this type of structure is mainly designed based on the theory of "force control", with relatively high rigidity, which can directly block the impact of "high-speed and high-strength" rolling stones. "Rolling stones cause continuous damage, and finally when the damage accumulates to a certain extent, there will be systematic and sudden damage without warning, which is extremely harmful

Finally, the traditional barrier-type sheds are mostly reinforced concrete structures, which have high construction costs, long construction periods, difficulty in building in alpine and canyon areas, difficult repairs after damage, and unfavorable factors such as increased bridge and tunnel loads due to their own weight. canyon area application

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