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Ballastless track bed structure part replacement method

A technology for structural components and replacement methods, applied in the directions of roads, tracks, ballast layers, etc., can solve the problems of high overall thickness, high replacement risk, and difficult removal of the CRTS III plate and self-compacting concrete bonding structure. The effect of avoiding the risk of driving along the point, simple construction process and high construction flexibility

Inactive Publication Date: 2020-11-03
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall thickness and weight of the CRTSⅢ type plate and self-compacting concrete bonded structure are high. Limited by the height of the catenary, it is difficult and inefficient to remove it by rail cranes or gantry cranes, and the risk of replacing the skylight within the period is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The concrete replacement method for the damaged bearing layer includes the following contents:

[0021] (1) The pre-construction survey determines the damage range of the supporting layer concrete.

[0022] (2) The ballastless ballast bed within 10m of both ends of the damaged support layer shall be planted and anchored. The anchoring depth of the planted bars shall be 40mm. 5 holes for planting bars shall be set in each row perpendicular to the line direction, and the distance between two adjacent rows shall be 3m.

[0023] (3) Take the wire saw operation holes from both ends of the support layer replacement area. The wire saw operation holes are arranged on the concrete of the support layer according to the upper, middle and lower rows. The hole is directly below the operation hole of the wire saw on the upper layer and is located in the middle of the concrete of the support layer, and the operation hole of the wire saw on the lower layer is directly below the operati...

Embodiment 2

[0030] CRTS II ballastless track filling layer mortar replacement method includes the following:

[0031] (1) Lock the fasteners of the mortar track plate of the filling layer to be replaced.

[0032] (2) The ballastless ballast bed within 20m of both ends of the filling layer mortar to be replaced shall be anchored with rebar planting, the anchorage depth of rebar planting shall be 40mm, and 2 rebar planting holes shall be set in each row perpendicular to the line direction, and the distance between two adjacent rows shall be 0.3m.

[0033] (3) Drill wire-saw holes with a thickness equal to the thickness at both ends and in the middle of the filling layer mortar.

[0034] (4) Insert the wire saw diamond chain into the operation hole of the wire saw, horizontally cut the contact surface between the filling layer mortar and the upper and lower ballastless track structures, and cut the filling layer mortar into two independent units.

[0035] (5) If the skylight cannot complete...

Embodiment 3

[0040] The integral replacement method of CRTSⅢ type track slab and filling layer concrete includes the following contents:

[0041] (1) Remove the CRTSⅢ track plate fastener to be replaced.

[0042] (2) Drill wire saw cutting holes on the contact surface between the filling layer concrete and the base plate. The wire saw cutting holes should avoid the lateral stoppers, and the distance between adjacent wire saw cutting holes should be 1.5-2m.

[0043] (3) Put the wire saw diamond chain into the wire saw operation hole, and cut the CRTSⅢ type track slab and the concrete of the filling layer vertically as a whole, and cut it into multiple independent concrete blocks.

[0044] (4) Temporary reinforcement devices are used to limit the lateral and vertical positions of the ballastless track.

[0045] (5) Remove the rails, remove the CRTSⅢ type track slab and the concrete of the filling layer as a whole in blocks.

[0046] (6) Lay the geotextile and hoist the new track slab to it...

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PUM

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Abstract

The invention discloses a ballastless track bed structure part replacement method. The method comprises the following steps: (1) reinforcing a ballastless track bed; (2) drilling a wire saw operationhole in the damaged part of the ballastless track bed structural component; (2) cutting the damaged part of the ballastless track bed structural component into removable independent units by adoptinga wire saw; (3) removing the cut structural component; (4) temporarily limiting the ballastless track bed; (5) dismounting a temporary limit; (6) re-pouring the positions of the removed structural parts; (7) performing fine adjustment of the line. The method is simple, quick, safe and reliable, the geometrical state of the ballastless track is stable in the regulation process, the ballastless track supporting layer, the cement emulsified asphalt mortar layer, the CRTS III type track plate and the self-compacting concrete bonding structure can be replaced within skylight time, and normal operation of a train is not affected.

Description

technical field [0001] The invention belongs to the technical field of disease treatment of ballastless track structures of high-speed railways, and in particular relates to a method for replacing structural parts of ballastless ballast beds. Background technique [0002] my country's high-speed railway mainly adopts ballastless ballast bed, in which the supporting layer is the key force transmission and bearing structure of ballastless ballast bed. In special environmental areas, the support layer of ballastless ballast bed will have dislocation cracking and overall pulverization caused by high temperature, freezing and thawing, etc., which will seriously affect the stability of ballastless track and train driving safety. It is urgent to repair the damaged area. The support layer concrete is replaced. [0003] The supporting layer is located at the lower part of the ballastless ballast bed structure and is covered by track slabs, ballast bed slabs, etc. It is difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B27/00E01B29/32
CPCE01B27/00E01B29/32
Inventor 易忠来靳昊李化建温浩谢永江黄法礼王振袁政成袁静怡
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI