End thorn anchor force enhancing structure and construction method

Abstract

The invention discloses an end thorn anchor force enhancing structure of a ballastless track and a construction method. The method comprises the following steps of measuring and monitoring a track elevation and a line center line; performing shield excavation at a bottom of a main end thorn of a n-shaped end thorn; forming grouting holes in the two sides and the bottom of a pipe wall of a shield structure, injecting grout into a roadbed AB-group filler through a floral pipe or a sleeve valve pipe, and forming the shield structure reinforced in a peripheral dendritic mode; vertically punching the top of the pipe wall of the shield structure upwards into the main end thorn, injecting adhesives into the holes, planting reinforcing bars in the holes, and connecting the shield structure with the main end thorn; pouring lightweight aggregate concrete into a cavity of the shield structure so that the reinforced shield structure and the existing end thorn are firmly combined into a whole, andforming a reinforced end thorn structure; and removing a template, repairing an off-line cable trough, and recovering a slope. By strengthening a height and an anchoring range of the main end thorn ofthe n-shaped end thorn, an anchoring force of the end thorn is remarkably increased; and purposes of reducing longitudinal displacement of the end thorn along a line and stabilizing the track structure of a road-bridge transition section are achieved.

Description

technical field [0001] The invention relates to the technical field of ballastless track, in particular to a ballastless track end thorn anchorage force enhancing structure and construction method. Background technique [0002] In recent years, my country's high-speed railway has developed rapidly. High-speed railway has the characteristics of high ride comfort and high stability. To achieve this goal, my country's high-speed railway lines generally adopt ballastless track structure. Compared with other track structures, ballastless track structure has Strong integrity, high stability and good durability. [0003] The Beijing-Shanghai high-speed railway adopts CRTSⅡ type slab ballastless track. The base of the ballastless track on the bridge is a longitudinal continuous reinforced concrete structure. Friction plates, end spikes and transition plates are installed at the beginning and end of the bridge. The anchorage structure behind the CRTS Ⅱ slab ballastless track platform...

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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