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A method for controlling the top surface line shape of concrete foundation bed

A control method and concrete technology, applied in roads, tracks, buildings, etc., can solve the problems of difficult control of plastering quality, large human factors, and a large number of personnel, and achieve the effects of saving labor hours, good appearance quality, and less investment

Active Publication Date: 2017-03-29
CHINA RAILWAY NO 9 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention of the present invention is to study the linear control of the top surface of the concrete bed. At present, the existing construction technology of the concrete top surface of the bed all adopts manual plastering and roughening. Low work efficiency; (2) The quality of plastering is difficult to control, and human factors are relatively large

Method used

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  • A method for controlling the top surface line shape of concrete foundation bed
  • A method for controlling the top surface line shape of concrete foundation bed
  • A method for controlling the top surface line shape of concrete foundation bed

Examples

Experimental program
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Effect test

Embodiment

[0022] The main indicators of the concrete foundation bed are as follows:

[0023] Embankment section - the total thickness of the subgrade bed of the main line of the ballastless track is 2.7m, and the range of the subgrade bed from top to bottom is C35 concrete, C20 concrete, mixed with 5% cement graded crushed stone, and A and B groups of fillers. Among them, the thickness of C35 concrete is 0.5m, the thickness of C20 concrete is the maximum freezing depth minus 0.5m, and the thickness of graded gravel mixed with 5% cement is the design freezing depth minus the maximum freezing depth.

[0024] Hard rock cutting section——cut out the original stratum within 0.2m below the subgrade surface of the hard rock bed section, wash it with high-pressure water, pour C35 plain concrete seal, and configure φ12@200 gluten.

[0025] Soft rock cutting section—concrete bed shall be used within the design frozen depth range, and 0.5m thick C35 concrete shall be poured on the surface of the be...

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Abstract

The invention discloses a concrete foundation bed top face line type control method. The method comprises the steps that (1) the bottom of a leveling machine and the bottom of a leveling platform are machined according to the dimension of the foundation bed top face, and a roller is arranged at the bottom of the leveling machine; (2) traveling rails are arranged on the two sides of the foundation bed top face respectively, traveling wheel mechanisms I are arranged at the two ends of the leveling machine respectively, and the leveling machine is erected on the traveling rails through the traveling wheel mechanisms I; traveling wheel mechanisms II are arranged at the two ends of the leveling platform, and the leveling platform is erected on the traveling rails through the traveling wheel mechanisms II; and (3) before concrete initial set of the foundation bed top face, the leveling machine travels on the foundation bed top face repeatedly, line type controlling and sloping are conducted on the foundation bed top face, and galling treatment is conducted on redundant concrete of the foundation bed top face through the leveling platform. The method has the advantages that the personnel investment is low, labor expenses are saved, the sloping quality can be controlled easily, the external quality is good, and the gradients of the whole line are identical.

Description

technical field [0001] The invention relates to a method for controlling the line shape of the top surface of a concrete foundation bed, which is used to solve technical problems such as the slope and line shape control of the top surface of the concrete foundation bed. Background technique [0002] The CRTSⅢ type pre-tensioned slab ballastless track of the Liaoning section of the Beijing-Shenzhen Passenger Dedicated Line was the first to be popularized and adopted in passenger dedicated projects in alpine regions. This line is located in the cold region of Northeast China, and it is very difficult to prevent frost heave for the subgrade. Therefore, this line adopts anti-frost measures for the concrete subgrade to control the construction quality of the subgrade concrete, and fundamentally solve the impact of subgrade settlement due to frost heave. Quality is the foundation of ballastless track construction quality, so optimizing and controlling construction technology and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B2/00
CPCE01B2/006E01B2204/08
Inventor 王鹰黄爱民于冬马文一唐洪岩李贺明金万旭
Owner CHINA RAILWAY NO 9 GRP
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