Method for scraping arch of ballastless track
A ballastless track and scraper technology, which is used in tracks, track laying, track maintenance, etc.
Active Publication Date: 2015-01-07
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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Problems solved by technology
The present invention solves the problem of ballastless track structure arching at a lower cost within the skylight time point, and is characterized in that it does not affect the normal operation of the high-speed railway
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[0010] The present invention will be further described below in conjunction with the accompanying drawings, but it is not intended to limit the present invention, and the scope of protection of the present invention is subject to the content recorded in the claims.
[0011] The method of this embodiment is as follows: firstly, remove the concrete of the road shoulder sealing layer 2 and the line space 3 in a certain range of the upper arch section, and cut and excavate the graded gravel with a depth of about 15 cm from the subgrade surface 4, thereby forming the undercut part 1. To provide working space for construction machinery. The excavation shall be completed with mechanical auxiliary tools, and the excavation test shall be carried out before construction. According to the actual situation, if necessary, pre-loose the graded gravel on the top 5 of the surface layer of the foundation bed, and then excavate the graded gravel. In one embodiment, the pre-loosening uses a hor...
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The invention claims the protection for a method for scraping an arch of a ballastless track. The method comprises the following steps of: 1) removing concrete between a road shoulder closed layer and a line of an arch section, and further cutting off 10-20cm of graded broken stone below a road bed; 2) pre-loosening the graded broken stone at the top of a surface layer of a bedding: adopting a horizontal drilling machine to perform horizontal cross drilling, and loosening the graded broken stone within the depth range of 10-20cm below the surface of the surface layer of the bedding; 3) removing the graded broken stone below a supporting layer: removing the graded broken stone which is about 10-20cm thick and has the same width with a scraping plate below the supporting layer through a continuous drilling measure of the horizontal drilling machine to form a working face of a scraping plate machine; and 4) placing the scraping plate machine and a scraping plate conveyor belt: scraping the graded broken stone below the supporting layer through the side surface of the scraping plate conveyor belt, forwards propelling a scraping plate conveyor, gradually scraping the graded broken stone, timely filling stow-wood and finally completing the scraping of a broken stone layer in the arch section.
Description
1. Technical field [0001] The invention relates to a construction method of a ballastless track, in particular to a method for scraping an upper arch of a ballastless track. 2. Background technology [0002] The ballastless track structure of the high-speed railway has very strict requirements on the deformation of the subgrade. Due to the complexity of the subgrade structure, various deformation forms may occur. The uplift and arching deformation of the subgrade of the ballastless track is one of them. The main reason is that the filler used in the subgrade has certain expansibility, such as quicklime modified soil, expansive soil and other expansive fillers, which will expand and deform after the subgrade is immersed in water, causing the track structure to arch. Once the arching deformation exceeds the adjustment capacity of the fasteners, the subgrade structure needs to be repaired, and certain technical measures should be taken to eliminate the arching of the subgrade. ...
Claims
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IPC IPC(8): E01B31/00
Inventor 张千里蔡德钩马伟斌叶阳升史存林李中国王立军刘杰程远水闫宏业闫鑫姚建平
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI