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Construction method for longitudinally connecting and laying ballastless track slabs

A construction method and ballastless track technology, applied in tracks, roads, ballast layers, etc., can solve the problems of delay in construction period, low efficiency, and the performance of CA mortar layer is difficult to meet the durability requirements of ballastless track high-speed railways. The effect of improving construction efficiency and improving durability

Active Publication Date: 2015-06-24
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The laying process of the traditional ballastless track slab is to build and install molds on both sides of the constructed base, then lay the ballastless track slab, and pass the ballastless track slab The pouring port on the ballast track slab pours CA mortar into the mold. After the CA mortar solidifies and forms a CA mortar layer, the mold is dismantled to complete the laying of the ballastless track slab. Durability Requirements for Railways
Moreover, when the existing track slabs are connected and prestressed, the existing connection method makes the entire construction process inefficient and delays the construction period

Method used

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  • Construction method for longitudinally connecting and laying ballastless track slabs
  • Construction method for longitudinally connecting and laying ballastless track slabs
  • Construction method for longitudinally connecting and laying ballastless track slabs

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Taking the laying of two ballastless longitudinally connected track slabs as an example, the length of the track slab 1 is 4856mm, and the superheight is 49mm; the length of the track slab 2 is 5350mm, and the superheight is 50mm. The construction flow chart of the track slab is as follows figure 1 Shown:

[0036] (1) Lay support layer 1: Lay a layer of hydraulic support layer on the roadbed. False seams 5 are cut on the support layer 1. After the support layer 1 is laid, the acceptance is carried out. The center line of the support layer that passes the acceptance is carry out stakeout;

[0037] Use a total station to stake out the midline positions of plates 1 and 2 on the hydraulic support layer and mark the positions with red paint, and number the staked out positions according to the design plate number.

[0038] (2) laying an isolation layer: an isolation layer 6 is laid on the false joint 5 of the support layer 1, and the isolation layer is a waterproof membran...

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PUM

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Abstract

The invention discloses a construction method for longitudinally connecting and laying ballastless track slabs and relates to the field of ballastless track slabs. The method includes the steps of 1, laying a support layer; 2, laying an isolation layer; 3, laying a reinforced mesh; 4, pre-laying track slabs; 5, connecting the track slabs; 6, pouring inter-slab resin mortar; 7, pouring self-compacting concrete. The method has the advantages that the isolation layer is laid during the construction process, the concrete is prevented from permeating from dummy joints when the self-compacting concrete is poured, and accordingly future maintenance is facilitated; the self-compacting concrete isolation layer is higher in self-strength than the traditional mortar adjusting layer, the track slabs are tightly combined, and accordingly durability of a whole ballast track is greatly improved.

Description

technical field [0001] The invention relates to the field of ballastless track slabs, in particular to a construction method for longitudinally connecting ballastless track slabs. Background technique [0002] As we all know, in the slab track structure, the ballastless track slab evenly transfers the load from the rails and fasteners to the concrete cushion, so the track slab plays a vital role in the entire railway structure. Therefore, the laying of ballastless track slabs has become an important part of the entire railway construction process. The quality of the laying and the length of the laying period directly affect the quality of the entire railway construction and the completion period. [0003] The laying process of the traditional ballastless track slab is to build and install molds on both sides of the constructed base, then lay the ballastless track slab, and pour CA mortar into the mold through the pouring port on the ballastless track slab. After the CA mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B1/00
Inventor 游优林国辉万壮龚永刘晓洪方华张凯庆廖维贵曾东蒲永峰董博
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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