Horizontal anchorage structure of suspension bridge and construction method

Abstract

The invention provides a horizontal anchorage structure of a suspension bridge and a construction method. The horizontal anchorage structure comprises a construction hole dug from the back side of a mountain in a bridge location area of the suspension bridge, a rear anchor chamber, an anchor plug body chamber and a front anchor chamber, wherein the rear anchor chamber, the anchor plug body chamberand the front anchor chamber are formed by sequentially and horizontally constructing from the construction hole to the side of the suspension bridge, and reinforced concrete is poured into the anchor plug body chamber from the front anchor chamber to the side of the suspension bridge to form an anchor plug body; a cable scattering saddle is installed in the front anchor chamber, and a cable rotating saddle is arranged in the main cable hole; the main cable is led into the main cable hole, is steered horizontally through the cable rotating saddle and penetrates through the main cable flat hole to reach the cable scattering saddle; and the main cable is connected with an anchor cable anchored on the anchor plug body after being scattered into cable strands through the cable scattering saddle. Compared with an inclined tunnel anchor and a composite anchorage, the rock mass bearing range is enlarged, the anchorage bearing capacity is high, mutual adverse effects of anchorage tunnels canbe avoided, the anchorage stability and safety are improved, the construction difficulty is reduced, the engineering investment is reduced, and operation and maintenance are convenient.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering and relates to a suspension bridge anchorage structure, in particular to a suspension bridge horizontal anchorage structure and a construction method. Background technique [0002] At present, the anchorage structure types of suspension bridges mainly include gravity anchorage, tunnel anchorage, rock mass anchorage, gravity anchorage (tunnel anchorage) + anchor cable anchorage, rock mass and reinforced concrete slab anchorage and concrete beam anchorage. anchor etc. Gravity anchors are generally used in weak rock foundations on the surface, relying on the friction between the self-weight and the foundation to resist the main cable tension. The excavation of earth and stone and the amount of concrete construction are large, and the impact on the ecological environment is also great. Tunnel-type anchors are usually built in hard or well-integrated rock mass in inclined tunnels. The tensi...

AI Technical Summary

Problems solved by technology

The inclined tunnel anchor is built on the side of the suspension bridge. A bridge with a large span and a large tonnage load requires a large anchorage, especially a suspension bridge with a weak surrounding rock, poor integrity and a relatively large tonnage. The tunnel anchor chamber is huge

Some suspension bridges are limited by lines and topography. Tunnel anchors often need to be built in IV~V rock masses with low engineering quality. Most of the tunnels pass through the rock mass between the two anchorages. In addition, some railway passenger stations are located in it, and the carriageways and platforms take up a lot of space. The wall is thin, and the interaction between the anchor and the tunnel is large; it is extremely difficult to form a tunnel in an inclined tunnel with a large anchorage, and the excavation and concrete volume will increase significantly, requiring large investment, long construction period and high risk

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