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Construction method of new structure of crtsⅢ slab ballastless track in tunnel section

A technology of slab-type ballastless track and new structure, which is applied in the direction of track, track laying, track maintenance, etc., can solve the problems of numerous slab track construction procedures, long working procedures, and complicated technology, so as to optimize the construction process, reduce the project cost, improve the The effect of construction speed

Active Publication Date: 2019-06-11
中交一公局集团华中工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for the new structure of the CRTSⅢ slab track in the tunnel section, so as to solve the problems of the slab track construction process in the above-mentioned background technology, which are complicated, complex and long.

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  • Construction method of new structure of crtsⅢ slab ballastless track in tunnel section
  • Construction method of new structure of crtsⅢ slab ballastless track in tunnel section
  • Construction method of new structure of crtsⅢ slab ballastless track in tunnel section

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Embodiment 1

[0024] see Figure 1-3 , the present invention provides a technical solution: a construction method for a new structure of CRTSⅢ slab ballastless track in the tunnel section, the method includes the following steps:

[0025] a Supporting layer and base construction: During the base construction, the supporting layer is poured continuously longitudinally along the line, and a transverse pre-crack is set every 5m. The width of the slit is about 1mm and the depth is 80mm. The supporting layer of C20 plain concrete is set and the laying of steel bars is cancelled. ;

[0026] b Laying of steel mesh: When laying steel mesh, the steel bar under the door-shaped steel bar of the track plate is located under the door-shaped steel bar, and does not pass through the door-shaped steel bar. A protective layer pad is placed under the steel mesh sheet, and the protective layer pad is placed per square meter. There are at least 4 spacers in the meter;

[0027] c Transverse belt construction:...

Embodiment 2

[0032] see Figure 1-3 , the present invention provides a technical solution: a construction method for a new structure of CRTSⅢ slab ballastless track in the tunnel section, the method includes the following steps:

[0033] a Supporting layer and base construction: During the base construction, the supporting layer is continuously poured longitudinally along the line, and a transverse pre-crack is set every 5m. The width of the slit is about 1mm and the depth is 100mm. The supporting layer of C20 plain concrete is set, and the reinforcement laying is canceled ;

[0034] b Laying of steel mesh: When laying steel mesh, the steel bar under the door-shaped steel bar of the track plate is located under the door-shaped steel bar, and does not pass through the door-shaped steel bar. A protective layer pad is placed under the steel mesh sheet, and the protective layer pad is placed per square meter. There are at least 4 spacers in the meter;

[0035] c Transverse belt construction:...

Embodiment 3

[0040] see Figure 1-3 , the present invention provides a technical solution: a construction method for a new structure of CRTSⅢ slab ballastless track in the tunnel section, the method includes the following steps:

[0041] a Supporting layer and base construction: During the base construction, the supporting layer is poured continuously along the line longitudinally, and a transverse pre-crack is set every 5m. The width of the slit is about 1mm and the depth is 90mm. The supporting layer of C20 plain concrete is set, and the laying of steel bars is canceled ;

[0042] b Laying of steel mesh: When laying steel mesh, the steel bar under the door-shaped steel bar of the track plate is located under the door-shaped steel bar, and does not pass through the door-shaped steel bar. A protective layer pad is placed under the steel mesh sheet, and the protective layer pad is placed per square meter. There are at least 4 spacers in the meter;

[0043] c Transverse belt construction: Du...

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Abstract

The invention discloses a construction method of a tunnel section CTRS III slab-type ballastless track novel structure. The construction method comprises the following steps of 1, construction of supporting layers and a base; 2, laying of reinforced net sheets; 3, construction of transverse spacer bands; 4, rough laying of track slabs; 5, fine laying of the track slabs; 6, construction of self-compacting concrete. By means of the construction method of the ballastless optimizing structure, the construction technology and the tool are innovated and improved, by omitting isolating layer geotechnical cloth, a firm compound structure is formed between self-compacting concrete track slabs and the base, the base is provided with non-reinforced concrete, base reinforcing steel bars and limiting groove elastic buffering pad layers are omitted, through integral binding of reinforcing steel bars or net sheets, the reinforcing steel bars are continuous, a transverse isolating belt is arranged between every two track slabs to facilitate casting of concrete, simultaneous casing of the self-compacting concrete of the two track slabs is achieved while the construction quality of the ballastless track is guaranteed, and the self-compacting concrete is continuously integrally formed under multiple track slabs.

Description

technical field [0001] The invention relates to the technical field of ballastless track construction in high-speed railway tunnel engineering, in particular to a construction method for a new structure of a CRTSⅢ slab ballastless track in a tunnel section. Background technique [0002] Compared with the CRTS Ⅰ and CRTS Ⅱ slab ballastless track, the CRTS Ⅲ slab ballastless track has changed the limit mode of the slab track, expanded the filling layer material under the slab, and optimized the structure of the track slab, which has strong integrity. , strong and durable, good stability, slow deformation accumulation and small track deformation, etc., but in tunnel projects with small environmental changes, there are many construction procedures and complex technologies, which affect the construction period. Improving the construction speed and saving costs while improving the construction quality of ballast track has become an important content of high-speed railway track res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B1/00E01B29/00
CPCE01B1/002E01B1/004E01B29/00E01B29/005E01B2204/09
Inventor 陈玉奎李旭阳
Owner 中交一公局集团华中工程有限公司