Device and method for quantitatively detecting defects of self-compacting concrete filling layer of ballastless track

A self-compacting concrete, quantitative detection technology, applied in the direction of measuring devices, material inspection products, mechanical area measurement, etc., can solve the problem of inability to quantitatively evaluate the pouring quality of self-compacting concrete, achieve remarkable rationality and scientificity, and low learning cost , high precision effect

Active Publication Date: 2018-11-27
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the visual inspection method is often used to judge the interface defects at the construction site, and it is impossible to quantitatively evaluate the pouring quality of self-compacting concrete

Method used

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  • Device and method for quantitatively detecting defects of self-compacting concrete filling layer of ballastless track
  • Device and method for quantitatively detecting defects of self-compacting concrete filling layer of ballastless track
  • Device and method for quantitatively detecting defects of self-compacting concrete filling layer of ballastless track

Examples

Experimental program
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Effect test

Embodiment 1

[0048] See attached Figure 3-8 , a ballastless track self-compacting concrete filling layer defect quantitative detection device, said device includes a base plate (1), a metal grid (2), filling particles (3), sampling paper (4), said sampling paper ( 4) Cover the area to be tested on the surface of the self-compacting concrete, and obtain the defect contour of the self-compacting concrete filling layer in the area to be tested; the metal grid (2) is placed on the bottom plate (1), and the obtained self-compacting concrete filling The sampling paper (4) of the layer defect contour is covered on the surface of the metal grid (2), and the filling particles (3) are filled into the metal grid (2) in the area of ​​the defect contour marked on the sampling paper (4); The filling particles (3) in the defect contour area are counted by the counting device to calculate the defect area of ​​the defect contour area; the counting device includes a funnel (5), a counter (7), and a support...

Embodiment 2

[0053] See attached Figure 1-8 , a method for quantitative testing of defects in self-compacting concrete filling layers of ballastless track, comprising the following steps:

[0054] In this example, the area of ​​the self-compacting concrete filling layer is: 1400cm 2 , the concrete label is: SCC1;

[0055] Step 1: Select the measurement area

[0056] According to the representative sampling principle, the self-compacting concrete slab surface of the filled layer is divided into 3 rectangles, and a measurement area is set at the inner corner of each rectangle, and the 2 measurement areas at the adjacent inner corners of adjacent rectangles are combined into one , evenly arranged in two adjacent rectangles; one measurement area is set on each side of the diagonal intersection point of each rectangle, and 14 measurement areas are arranged on the self-compacting concrete slab surface of the filling layer, and each measurement area is a square , with a side length of 50mm an...

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Abstract

The invention discloses a device and a method for quantitatively detecting defects of a self-compacting concrete filling layer of a ballastless track. The device comprises a base plate, a metal grating, filling particles, a sampling paper and a counting device. The detecting method comprises the following steps: covering the sampling paper on a pit position on the surface of a measuring area, calibrating and imitating an outline of the pit; covering the sampling paper on the surface of the metal grating; filling the filling particles into the metal grating in the imitated pit outline area on the sampling paper; collecting the filling particles filled in the metal grating and calculating the area of the defect outline. The device is capable of acquiring the defect rate of the self-compacting concrete filling layer through quantitative test analysis, so as to objectively evaluate the filling quality of the self-compacting concrete filling layer. The method disclosed by the invention hasthe characteristics of simple operation, convenience in use, being scientific and reasonable, and the like, is wide in application range and is especially suitable for the test evaluation for concreteconstruction quality of the filling layer of plate-type ballastless track or similar structures.

Description

technical field [0001] The invention relates to the technical field of inspection and control of concrete construction quality of slab ballastless track structure of high-speed railway, in particular to a device and method for quantitative detection of defects in self-compacting concrete filling layer of ballastless track; in particular to a type III slab ballastless track of high-speed railway A self-compacting concrete filling layer defect quantitative detection device and method. Background technique [0002] my country's high-speed railway construction technology has achieved world-renowned achievements, and its construction and operation mileage ranks first in the world. At present, my country's high-speed railway track structure mainly adopts ballastless track technology, which covers a variety of slab ballastless track structures such as CRTSI type, CRTSⅡ type and CRTSIII type. The filling layer is the key component and core technology of the above-mentioned track str...

Claims

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Application Information

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IPC IPC(8): G01N33/38G01B5/20G01B5/26
CPCG01B5/20G01B5/26G01N33/383
Inventor 李文旭龙广成马聪
Owner CENT SOUTH UNIV
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