| With the gradually development of the western plan, the rapid increase of traffic demand, especially overloaded railway construction is an important part of the economic development of our country, in the midst of railway and highway construction, the stability of the slope plays an important role in line safe operation. Zhunchi railway is a newly built railroad line which, the line stretches approximately 180 kilometers. The line is located in the territory of Shanxi Youyu. this paper is in combination with the overloading railway that connects Dazhun and Shuohuang whose roadbed is loess,which is located in the middle of Inner Mongolia and the north of Shanxi Province.analy ses the reason of affecting the slope sliding blocks, and put forward reasonable improvement scheme to issue section, through the measured data and theoretical calculation, analysis the cause of the line slope destruction and find a reasonable and reliable form of slope protection of the loess subgrade which is suitable for the region.In this article, the main research contents are as follows:(1) Through the contrastive to find out the suitable for slope stability coefficient calculation method of the section, simplified the Bishop analysis method.(2) According to the investigation and analysis of the loess edge broken modes, the present protection situation, find out the reasons that lead to the research part slope destructionrcracking and failure of the slope caused by rainfall infiltration and freeze-thaw expansion.(3) According to its reason of the slope,an protection scheme was given,in this paper, we present a detailed optimized scheme, through the comparison of design optimized program, find out the reasonable form of protection for the segment, the combination of plant protection and engineering protection frame protection form.which can provides a certain reference, for the later loess subgrade slope protection. |
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