Retaining and protecting structure of reinforcing existing line of steel-structure self-drilling type hollow anchor rod

Abstract

The invention discloses a retaining and protecting structure of a reinforcing existing line of steel-structure self-drilling type hollow anchor rod. Protecting structures are arranged on side slopes of the two sides of a roadbed. Angle iron nets are horizontally and vertically arranged on the surfaces of side slope protecting walls from the bottoms of the side slopes and the tops of the side slopes in a crossed mode in the roadbed direction, and cushion plates are arranged on nodes of the angle iron nets. Hollow anchor rods which penetrate through the cushion plates and the nodes and go deep into the ground layers of the side slopes are vertically arranged on the protecting walls of the side slopes, and hollow cavities are formed in the hollow anchor rods. Anchoring force is generated on reinforcing bodies in the ground layers behind retaining walls and the protecting walls through self-drilling type hollow anchor rods, the anchoring force is evenly exerted on the wall faces of the reinforcing bodies by means of the cushion plates and angle iron, and a formed reinforcing system is good in integrity and high in stability.

Description

Technical field [0001] The invention relates to a railway roadbed protection project, in particular to a steel structure self-drilling hollow anchor rod for reinforcement of existing line support and protection structures, which is suitable for the treatment of existing line support projects with narrow terrain, and is also suitable for railways, highways and water conservancy. Background technique [0002] The mountainous railway has steep terrain and narrow construction sites, especially for existing line projects with retaining walls and retaining walls in the early stage. It is usually difficult to brush the slope. However, the construction of large-scale supporting structures is subject to site restrictions, and material transportation and structural construction are disadvantageous. And the work efficiency is low and the cost is high. [0003] At present, affected by the economic conditions and construction standards of the original construction, cracks and deformations have ...

AI Technical Summary

Problems solved by technology

[0002] The terrain of mountainous railways is steep and the construction site is narrow, especially the existing line projects with parapets and retaining walls in the early stage. It is usually difficult to clean up the slope. However, the construction of large-scale retaining structures is limited by the site, which is unfavorable for material transportation and structural construction. And low work efficiency, high cost

[0003] At present, affected by the economic conditions and construction standards of the original construction, after long-term operation, the parapet wall and retaining wall of the existing line have cracked and deformed. It is difficult to meet the safety needs by local grouting and repair measures. Eliminate local cracks and bulging deformation points on the existing retaining wall and retaining wall, but the integrity is not good

However, since the overall slope is stable and there are no geological disasters such as landslides and collapses, using frame anchor cables, rib-column anchor cables, anchor piles, anchor cable piles and other reinforcement schemes requires a large amount of concrete and a lot of steel, which is extremely unsuitable for economy.

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