Suspension bridge anchorage and construction method thereof

Abstract

The invention discloses a suspension bridge anchorage and a construction method of the suspension bridge anchorage, and relates to the technical field of suspension bridge anchorage design and construction. The device comprises an obliquely-arranged pilot tunnel, a first anchor chamber and a second anchor chamber. The length of the pilot tunnel is configured such that the thickness of a rock stratum on the side below the terminal end of the pilot tunnel is not less than a preset thickness, the first anchor chamber is arranged below the pilot tunnel and communicates with the terminal end of thepilot tunnel, a steering piece is arranged in the first anchor chamber, and the steering piece is positioned at the rock stratum with the thickness not less than the preset thickness; and the secondanchor chamber is vertically arranged below the first anchor chamber and communicates with the first anchor chamber, the second anchor chamber is filled with an anchor block, and a fixing assembly isembedded in the anchor block. The suspension bridge anchorage and the construction method of the suspension bridge anchorage integrate the structural advantages of a tunnel anchor and a gravity anchorsimultaneously, and are suitable for steep slopes and rock mass broken sections.

Description

technical field [0001] The invention relates to the technical field of design and construction of suspension bridge anchorages, in particular to a suspension bridge anchorage and a construction method thereof. Background technique [0002] Due to its excellent spanning ability, the suspension bridge has increasingly become the preferred bridge type for super long-span bridges. It is an ideal bridge type for crossing canyons, rivers and straits. It has very broad application prospects in the mountainous western regions of my country. Suspension bridge is a kind of flexible structure, which mainly includes four parts: main girder, tower pier, cable and anchorage. Among them, anchorage is the main load-bearing structure of suspension bridge and the key part of anchoring main cable of suspension bridge. Its main function is to The tension of the main cable is transmitted to the foundation. Generally, the anchorage of suspension bridges is divided into two types: self-anchor and ...

AI Technical Summary

Problems solved by technology

However, when the joint structure of the rock mass belongs to broken rock or even clastic rock, it is difficult for the surrounding rock to provide an effective "clamping effect" for the anchor plug body; the underground excavation of anchor chambers with large areas, large angles, and variable cross-sections is extremely difficult , Construction safety is difficult to guarantee, and the construction efficiency is extremely low, so it is not suitable to use tunnel anchors in this case

[0004] Gravity anchors use friction to balance the horizontal component of the tension of the main cable. Therefore, gravity anchors are huge. On land, grading, vertical enclosures, and caissons are generally used for construction, which requires a large construction site. In mountainous areas, when the ground slope is steep, it is necessary to excavate the mountain on a large scale and set up high slope protection. In this case, the project is difficult, damaging the environment, and difficult to implement

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