Temperature and deformation monitoring analysis of rockfill ventilated roadbeds in plateaus freeze-thaw areas
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摘要: 为深入了解高原冻融区填石通风路基热量传递规律及沉降变形特征，依托新疆喀喇昆仑山区G219线冻融区新建公路工程，通过现场布设温度传感器和沉降监测点，对填石通风路基的温度变化和沉降变形进行实时监测。监测数据分析表明，填石通风路基对道路内部热量传入起到阻碍作用，并且随填土高度增加，通风路基底部出现明显的温度滞后现象，降低路基的整体沉降变形，减缓阴阳坡效应。Abstract: To clarify the characteristics of uneven settlement and deformation of rockfill ventilated roadbed in plateau freeze-thaw areas, relying on the new highway project of G219 in the Karakorum Mountain area of Xinjiang, the temperature change and settlement deformation of rockfill ventilated roadbed were monitored in real-time by temperature sensors and settlement monitoring. The results show that the rockfill ventilated roadbed hinders the heat transfer from the inside of the road, and with the increase of the filling height, there is an obvious temperature lag at the base of the ventilation roadbed, which reduces the overall settlement deformation of the roadbed and slows down the sunny-shady slope effect.
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