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| Experimental Research on the State Index ofCWR in Golmud - Lhasa Section of Qinghai - Tibet Railway |
| ZHANG Xiang - min1，GAO Liang1，CUI Ri - xin1，ZENG Zhi - ping2，CHEN Xian - mai2 |
| (1. Beijing Jiaotong University， Beijing 100044, China; 2. Central South University，Changsha，Hunan 410075，China) |
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Abstract Research purposes ： Golmud - Lhasa Section of Qinghai - Tibet Railway in permafrost zonehas many unique characteristics，such as low temperature and oxygen， changeable climate， indiscernible four seasons， big day/night temperature difference，long annual negative temperature，stronger solar radiation，more steep gradients，thicker ballast bed，more thawing settlement of subgrade and so on，which are diferent to the value and variation laws of state index of CWR. So it is very important and urgent to study the value and variation laws of state index. Re—arch conclusions ：( 1) The monitoeng system for state index of CWR on plateau railway in pemafrost zone was developed. This system can gather the temperature and displacement at the same time，and realize the lasting observation and automatic data storage of rail displacement，brdge beam displacement，air temperature，rail temperature and brdge beam temperature. (2) With the CWR monitorng system lay in the permafrost zone， the rail and beam temperature difference value and change laws were revealed. Longitudinal and lateral displacement of rail， relative displacement between beam and rail and beam - ends were evaluated too. ( 3 ) It is proved that the CWR in the permafrost zone is stable and reliable. (4)The research results can be applied in the state monitdng of CWR，and it also has important reference value in ballastless track constniction and expermental research on the stability CWR.
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Received: 18 November 2015
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2016, Vol. 33 
