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| Research on the Monitoring Technology of Railway Subgrade Settlement Disease |
| PANG Ying - gang 1 , LI An - hong 1 , XU Jun 1 , LIU Yi2 |
| (1. China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, China; 2. . Southwest Jiaotong University, Chengdu, Sichuan 610031, China) |
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Abstract Abstract：Research purposes： Along with the development of the high - speed and heavy haul railway, subgrade settlement disease plays a key role in railway operation safety , which lots of subgrade diseases are relating to. This paper studies the characteristics and the action mechanism of railway subgrade settlement disease and the settlement prediction methods , analyzes the traditional subgrade settlement monitoring methods and three new subgrade settlement monitoring methods which contain vehicle - borne ground penetrating radar (Vehicle - borne GPR) monitoring technology , interfer ometric synthetic aperture radar (InSAR) and distributed Brillouin optical fiber sensing technology ( BOTDR) , and provides a reference for railway subgrade settlement disease monitoring. Research conclusions:(1) Railway subgrade settlement is mainly from two aspects of road base and foundation，which is produced under the function of a variety of factors. (2) Settlement prediction methods are mainly based on the existing monitoring data , and still in the process of development. (3) Traditional monitoring methods cant meet the modem requirements of efficient , non - destructive and real - time. New monitoring methods can basically meet the requirement , but there are still some limitations. (4) The distributed monitoring system has become the trend of the subgrade settlement monitoring technology.
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Received: 08 October 2015
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2015, Vol. 32 
