Surface wave detection method and device for railway embankment filling quality

A detection method and embankment technology, which can be applied to measurement devices, use sonic/ultrasonic/infrasonic waves to analyze solids, and use sonic/ultrasonic/infrasonic waves for material analysis, etc. Improve the detection efficiency, reduce the construction period, and have the effect of high accuracy

Inactive Publication Date: 2018-02-27
CONSTR COMPANY OF CHINA RAILWAY NO 8 ENGNEERING GRP
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AI Technical Summary

Problems solved by technology

[0002] The traditional railway embankment filling quality inspection method mainly evaluates the embankment filling quality by measuring the physical and mechanical indicators such as the compaction coefficient of the embankment filling soil and the foundation coefficient. Overlay detection cannot fully detect the quality of embankment filling;
[0003] Traditional detection methods require a long construction time, are time-consuming and labor-intensive, and have low detection efficiency, which cannot meet the needs of the rapid development of my country's railways

Method used

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  • Surface wave detection method and device for railway embankment filling quality
  • Surface wave detection method and device for railway embankment filling quality
  • Surface wave detection method and device for railway embankment filling quality

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Embodiment 1

[0051] 1. Project overview

[0052] The new Chongqing-Guizhou Express Railway will be a sister section of the old Yu-Guizhou Railway, initially planned as National Railway Class I, with a total length of 345 kilometers and a speed of 200 kilometers per hour. The Chongqing-Guizhou Express Railway will be connected with the Lanzhou-Chongqing Line and the Guizhou-Yangzhou-Guangzhou Line, and will become another important rapid sea passage in the west. It will be put into operation by the end of 2017.

[0053] The line is drawn from Chongqing West Railway Station (the existing Chongqing East Railway Station) on the east side of Zhongliang, Chongqing City, passes through Qijiang River in the south, enters the territory of Tongzi County, Zunyi City, Guizhou Province, and connects to Guiyang North, the new passenger station of Guiyang City, through Zunyi City and Xifeng County stand. The length of the main line is 345km. Among them, the area in Chongqing is 112km. The territory of...

Embodiment 2

[0061] Main construction technical scheme:

[0062] The subgrade section of DK192+911-DK192+953 has a total length of 42m, and the site is set along the line. 12-channel seismograph is used for on-site detection. The main frequency of the geophone is 4.5Hz piezoelectric ceramic geophone. The channel spacing is set to 1m, and the coverage length of each survey line is 11m. Therefore, four measuring lines need to be arranged to cover the entire subgrade section. The specific survey line layout of DK192+911-DK192+953 subgrade section, the detection direction is from small mileage to long mileage, and the measuring points are numbered from small to large starting from the position close to the excitation point. Among them, DK192 refers to the mileage number of the railway.

[0063] An 18-pound sledgehammer was selected as the vibration source for on-site data collection to excite surface waves. The excitation point was set at the small mileage end of each survey line, the offset...

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Abstract

The invention relates to the technical field of railway construction, in particular to a surface wave detection method and a surface wave detection device for railway embankment filling quality. The method provided by the invention comprises the following steps: adopting an n-channel detector to carry out surface wave detection in a roadbed site; obtaining a surface wave velocity-depth curve distribution chart of n-1 embankments; obtaining compaction coefficients and foundation coefficients at different depth positions of the embankments; obtaining a relational expression between an embankmentsurface wave velocity and a compaction coefficient and a relational expression between an embankment surface wave velocity VR and a foundation coefficient by analyzing the embankment surface wave velocity and the compaction coefficient and the foundation coefficient of a corresponding position; and according to standard values in existing railway bed design specifications, respectively and correspondingly substituting the relational expression between the embankment surface wave velocity and the compaction coefficient and the relational expression between the embankment surface wave velocityand the foundation coefficient to obtain the surface wave velocity of the filling quality of two railway embankments, wherein the larger surface wave velocity of the filling quality of the railway embankments is used as a standard value for surface wave detection of the compaction quality of embankment fillers.

Description

technical field [0001] The invention relates to the technical field of railway construction, in particular to a method and device for detecting surface waves of railway embankment filling quality. Background technique [0002] The traditional railway embankment filling quality inspection method mainly evaluates the embankment filling quality by measuring the physical and mechanical indicators such as the compaction coefficient of the embankment filling soil and the foundation coefficient. Overlay detection cannot fully detect the quality of embankment filling; [0003] The traditional detection method needs to occupy a long construction time, is time-consuming and laborious, and the detection efficiency is low, which cannot meet the needs of the rapid development of my country's railways. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a surface wave detection method and device for railway embankment filling qua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/07
CPCG01N29/045G01N29/07G01N2291/011G01N2291/0232G01N2291/028G01N2291/0423
Inventor 邓国兵陈祥彭舸刘彦许正科刘增旭敬国民孙阁朱涛郑学军王思威
Owner CONSTR COMPANY OF CHINA RAILWAY NO 8 ENGNEERING GRP
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