A structure and construction method for enhancing the anchoring force of end thorns

Abstract

The invention discloses a ballastless track end thorn anchor force enhancement structure and a construction method, which measure and monitor the track elevation and the line center line; perform shield excavation at the bottom of the main end thorn of the Π-shaped end thorn; There are grouting holes on both sides and bottom of the pipe wall, inject grout into the filler of group AB of the subgrade through flower pipes or sleeve valve pipes, and form a shield structure with dendritic reinforcement around the periphery; holes are drilled vertically upward at the top of the pipe wall of the shield structure To the main end thorns, inject adhesive into the hole and plant high-strength steel bars to connect the shield structure and the main end thorns; pour light aggregate concrete into the cavity of the shield structure to make the reinforced shield structure and the existing end thorns It is firmly integrated to form a reinforced end spine structure; the formwork is removed, the cable trough outside the line is repaired, and the slope is restored. The invention significantly increases the anchoring force of the end thorns by strengthening the height of the main thorns and the anchoring range of the Π-shaped end thorns, and achieves the purpose of reducing the longitudinal displacement of the end thorns along the line and stabilizing the track structure of the transition section of the road and bridge.

Description

technical field [0001] The invention relates to the technical field of ballastless tracks, in particular to a structure and a construction method for enhancing the anchoring force of end thorns of ballastless tracks. Background technique [0002] In recent years, my country's high-speed railway has developed rapidly, and a "four vertical and four horizontal" high-speed railway network has been initially built. By the end of 2017, the operating high-speed railway mileage reached 25,000 kilometers. The "eight vertical and eight horizontal" high-speed railway network is advancing. High-speed railways have the characteristics of high ride comfort and high stability. In order to achieve this goal, ballastless track structures are generally used in my country's high-speed railway lines. Compared with other track structures, ballastless track structures have strong integrity, high stability and Features good durability. [0003] The Beijing-Shanghai high-speed railway adopts CRTS Ⅱ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art that the temperature, force, braking force and other loads of the track structure are too large, and the anchoring force of the Π-shaped end thorns is insufficient, which leads to the movement of the track structure, the present invention provides a ballastless track end thorn anchoring force enhanced structure And the construction method, by increasing the height of the main end thorns, to reduce the longitudinal displacement of the end thorns along the line and the force of the end thorns, and stabilize the track structure

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