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| Research on the Treatment Scheme of Horizontal Displacement Disease in Side Spines Zone of Ballastless Track |
| JIN Hai-yuan |
| (China Railway Siyuan Survey and Design Group Co. Ltd， Wuhan,Hubei 430063, China) |
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Abstract Abstract：Research purposes： Based on the analysis of the horizontal displacements of side spines zone of an operational high-speed railway, the main reasons for the horizontal displacement are analyzed according to the field characteristics. The reinforcement scheme, construction technology and key technical parameters are determined according to the characteristics of the surrounding rock mass and the site construction condition, to provide a strong support for the establishment of maintenance technology system of ballastless track. Research conclusions：（1）The horizontal displacement of the side spine is mainly caused by the residual deformation of the surrounding rock and soil, resulting in that resistance can not meet the orbit longitudinal huge force caused by temperature changes.（2） The paper puts forward the remediation plan of steel pipe grouting to deal with the disease of the side spines zone, including vertical and inclined grouting hole arrangement around the side spines zone, divided into deep hole grouting and shallow hole grouting. Using superfine cement as the main grouting material, grouting pressure is controlled in the 0.1 ~ 0.3 MPa. The two adjacent orbital measurement of horizontal or vertical deformation in the construction process are not allowed to be more than 1mm.（3）The steel tubes retained in the grouting hole after grouting, which formed micro-group anchor structure, and greatly enhanced the level of resistance to deformation.（4）The research results can provide a reference for the design，construction，operation and maintenance of side spines zone of ballastless track.
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Received: 20 May 2017
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2017, Vol. 34 
