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研究目的:柴达尔-木里铁路(柴木铁路)全长142.04 km,沿线高温不稳定和极不稳定多年冻土广泛分布,冻土含冰量较高,同时由于柴木铁路呈东南-西北走向,冻土路基又面临着阴阳坡问题。柴木铁路53 km路段采用了片石通风路基,为保证路基的稳定性,有必要对片石通风措施的工程效果进行分析研究。研究结论:2007年以来的监测结果表明,在高温冻土区,片石通风路基和片石护道仅能有效冷却阴坡侧路基和坡脚;在低温基本稳定多年冻土区,片石通风措施不仅可以有效冷却路基本底,对阴阳坡现象也具有一定的抑制作用。
Research purposes: The Cidar-Muli Railway (Chai Mu Railway) has a total length of 142.04 km. The unstable and unstable permafrost along the high-temperature region is widely distributed and the ice content in the frozen soil is relatively high. Simultaneously, due to the southeast-northwest strike of the Chai Mu Railway, Permafrost embankment is also facing the problem of yin-yang slope. In the section of 53 km of Chai Mu railway, a stone-ventilated roadbed is used. In order to ensure the stability of roadbed, it is necessary to analyze the engineering effect of the stone-screen ventilation measures. Research conclusions: The monitoring results since 2007 show that, in the permafrost regions, the stone-ventilated roadbed and the rock protection can only effectively cool the side slope and the foot of the shady slope; at the low temperature and stable permafrost region, An effective cooling base at the end of the phenomenon of yin and yang slope also has some inhibitory effect.