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Frost Heave Damage to a Road on a Permafrost Island in Qinghai-Tibet Plateau
There widely exists permafrost over Qinghai-Tibetan Plateau. Many roads have to pass permafrost regions. In northeast edge of the plateau, a section of a road has been suffering from frost heave damage for many years. In 2004, a drilling investigation was carried out. It was found that the section of the road was built on a permafrost island, and the soil in active layer belongs to the frost-susceptible silt. Springs on mountain slopes supply the silt with sufficient water. Samples of the silt were taken back to conduct frost heave tests. The frost heave tests were conducted under three moisture conditions, namely sufficient water supply, at liquid limit water content without water supply, and at plastic limit water content without water supply. Test results show that a considerable frost heave appears for the water supply samples, and multi-layer segregated ice is observed. On the other hand, the frost heave is not obvious while keeping water content of samples below its plastic limit. Based on the results, reasonable suggestions were proposed to the road re-construction.
Frost Heave Damage to a Road on a Permafrost Island in Qinghai-Tibet Plateau
There widely exists permafrost over Qinghai-Tibetan Plateau. Many roads have to pass permafrost regions. In northeast edge of the plateau, a section of a road has been suffering from frost heave damage for many years. In 2004, a drilling investigation was carried out. It was found that the section of the road was built on a permafrost island, and the soil in active layer belongs to the frost-susceptible silt. Springs on mountain slopes supply the silt with sufficient water. Samples of the silt were taken back to conduct frost heave tests. The frost heave tests were conducted under three moisture conditions, namely sufficient water supply, at liquid limit water content without water supply, and at plastic limit water content without water supply. Test results show that a considerable frost heave appears for the water supply samples, and multi-layer segregated ice is observed. On the other hand, the frost heave is not obvious while keeping water content of samples below its plastic limit. Based on the results, reasonable suggestions were proposed to the road re-construction.
Frost Heave Damage to a Road on a Permafrost Island in Qinghai-Tibet Plateau
Sheng, Yu (author) / Wu, Jichun (author) / Cao, Wei (author) / Chen, Ji (author)
14th Conference on Cold Regions Engineering ; 2009 ; Duluth, Minnesota, United States
Cold Regions Engineering 2009 ; 139-144
2009-08-27
Conference paper
Electronic Resource
English
Permafrost Studies in the Qinghai-Tibet Plateau for Road Construction
| Online Contents | 2005
Permafrost Studies in the Qinghai-Tibet Plateau for Road Construction
| British Library Online Contents | 2005