Permafrost

mechanics parameters both in frozen and non-frozen condition, and taking indoor test to
confirm constitutive curve of frozen soil, then coupling deadweight stress field and temperature
stress field, is feasible.
Key words: frozen ground tunnel; frozen-heave force; model test; numerical computing
Investigation of the Awning Effect on the Roadbed Slope in
High-Temperature Permafrost Regions
——For Example of the Huashixia Valley Filed Test Section at Qing-Kang Road
Wen-jie Feng, Yu Sheng, Wei Ma, Zhi Wen
(State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou 730000, China)
Abstract:With the warming of the globe is coming, all kinds of active protecting permafrost
methods were accepted, and the awning protecting the embankment slope is one of them, also
was adopted at the Qinghai-Tibet road and railway and QingKang road. From the weather data
analysis, we found the mean annual air temperature(MAAT) was -3.80 at Huashixia valley,
but the MAAT was -5.3 at Beiluhe regions. Along with the trend of globe warming up, the
QingKang road certainly will be the premonitory of the Qinghai-Tibet road and railway. It is
very important and necessary to make clear the awning active protecting permafrost methods
for high-temperature permafrost, and all of these are important meaning for the Qinghai-Tibet
road and railway future run, the protecting permafrost and the maintenance of all kinds methods
along with the Qinghai-Tibet lines.
Key words:high-temperature permafrost; awning;Qing-Kang road; permafrost table;
Huashixia valley
The analysis of the anti-frozen effect of the heat preservation foundation
of the hydraulic buildings in the seasonal cold region
Wen-jie Na
(Heilongjiang provincal hydraulic research institute)
Abstract: This paper mainly aims at the defects which exposed in popularizing and applying
the anti-frozen method for heat preservation foundation of hydraulic structure. Through
adopting the field spot simulation method and observing the EPS heat preservation foundation
in four winter and springs, we obtained the spot observation data and results, given the variation
characteristics of temperature field and variation discipline of humidity field for heat
preservation foundation.
Through the information of the temperature fields under the EPS thermal insulation boards
with different thickness and density, the frost heaving variation orderliness of the temperature
fields, and the testing results of the correlative physical mechanics’ parameter of EPS, the
conception that EPS heat preservation foundation can restrain frost heaving has been validated,
65