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Qihao Yu
Chinese Academy of Sciences
GeomorphologyGeologyPermafrostGeotechnical engineeringPlateau
56Publications
13H-index
682Citations
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Publications 51
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#1Zhenyu Zhang (CAS: Chinese Academy of Sciences)H-Index: 1
#2Qihao Yu (CAS: Chinese Academy of Sciences)H-Index: 13
Last. Guilong Wu (CAS: Chinese Academy of Sciences)H-Index: 1
view all 7 authors...
Abstract Temperature-controlled ventilated embankment (TCVE) is a feasible air-cooled embankment. It can control the heat transfer mode in ventilated duct of duct ventilated embankment according to the ambient air temperature with auto-temperature-controlled wind doors installed in the duct nozzle. For investigating the cooling performance and engineering effect of TCVE, a prototype testing section of the expressway was constructed on Qinghai-Tibet Plateau. The field observation data showed that...
1 CitationsSource
#1Qihao Yu (CAS: Chinese Academy of Sciences)H-Index: 13
#2Yanhu Mu (CAS: Chinese Academy of Sciences)H-Index: 12
Last. Xicai Pan (CAS: Chinese Academy of Sciences)H-Index: 8
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Abstract The thermal performance of an experimentally built expressway embankment with a combined cooling measure at Beiluhe Basin in the Qinghai-Tibet Plateau was investigated based on long-term field monitoring. Six-year records of soil temperatures showed that the embankment cooled by a measure combining hollow concrete bricks and ventilation ducts had a significant cooling effect on the subgrade soil. Over the investigated time period, the permafrost table beneath the embankment moved upward...
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#1Yanli XieH-Index: 2
#2Qihao YuH-Index: 13
Last. Tingtao GouH-Index: 1
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Last. YouH-Index: 1
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The Haerbin-Dalian Passenger Dedicated Line is the first high-speed railway constructed in the seasonally frozen ground regions of northeastern China. Frost heave diseases occurred in the first winter of its operation(between October 2012 and January 2013), and frost heave was observed mainly in the roadbed fills that were considered not susceptible to frost heave. This paper proposes applying two special pavements — black pavement and insulation-black pavement — to improve the thermal regime of...
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#1Yanhui You (CAS: Chinese Academy of Sciences)H-Index: 7
#2Mingbin YangH-Index: 1
Last. Qingbai Wu (CAS: Chinese Academy of Sciences)H-Index: 25
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Abstract Existing grounded ice or floating ice in late winter represents the distinct thermal state of the lake bottom, which regulates the evolution processes of thermokarst lakes. The aim of this study was to identify either grounded ice or floating ice using ground penetrating radar (GPR) and analyze the factors that influence identification. Densely spaced GPR measurements were collected using a pair of 900 MHz antennas in a thermokarst lake on the northeast Qinghai–Tibet Plateau. Numerical ...
1 CitationsSource
#1Lei Guo (CAS: Chinese Academy of Sciences)H-Index: 8
#2Zhongqiu Zhang (EPRI: Electric Power Research Institute)H-Index: 3
Last. Tingtao Gou (EPRI: Electric Power Research Institute)H-Index: 1
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Abstract During the construction of the ±400 kV direct current power transmission line (DCPTL), frozen blocks were backfilled into the foundation pits in permafrost regions because of the lack of backfilling materials and other problems, but this resulted in less compact backfilled soils. To ensure the stability of the tower foundations, a large number of thermosiphons were installed. This study discusses the threat to the stability of tower foundations of water infiltration along the large void...
5 CitationsSource
#1Xicai Pan (CAS: Chinese Academy of Sciences)H-Index: 8
#2Qihao Yu (CAS: Chinese Academy of Sciences)H-Index: 13
Last. Yanping Li (U of S: University of Saskatchewan)H-Index: 9
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Abstract The seasonal hydrological mechanisms of two thermokarst lakes on the northeastern Qinghai-Tibet Plateau (QTP) were characterized by three-year intensive field observations and a water balance model. In three ice-free seasons, the supra-permafrost discharge contributed a mean ratio of over 170% of the precipitation. In the ice-cover seasons, the supra-permafrost discharge contribution varied between -20% and 22% of the water storage change. Results show that a large portion of the lake w...
7 CitationsSource
#1Yanhui You (CAS: Chinese Academy of Sciences)H-Index: 7
#2Jinchang WangH-Index: 1
Last. Lei Guo (CAS: Chinese Academy of Sciences)H-Index: 8
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Abstract Pile foundations are widely used to support dry bridges crossing large extents of warm and ice-rich permafrost zones along the Qinghai-Tibet Railway (QTR). The performance of these pile foundations are related to permafrost conditions surrounding the piles. However, the impacts of permafrost degradation on the stability of pile foundations have been rarely investigated. In this study, permafrost degradation has been assessed around several pile foundations in the Tanggula Mountain area ...
7 CitationsSource
#1Chang Yuan (CAS: Chinese Academy of Sciences)H-Index: 4
#2Qihao Yu (CAS: Chinese Academy of Sciences)H-Index: 13
Last. Lei Guo (CAS: Chinese Academy of Sciences)H-Index: 8
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Abstract Based on monitoring data from the Qinghai-Tibet Testing Expressway (QTTE) in the Beiluhe Basin on the Qinghai-Tibet Plateau, we investigated the deformation mechanism of an expressway embankment in a typical warm and ice-rich permafrost region. Compared with the Qinghai-Tibet Highway (QTH) under similar environmental conditions, the QTTE has the following unique characteristics with respect to thermal effects and embankment deformation: (1) Under the multiplied heat of the QTTE and the ...
3 CitationsSource
#1Yanhui You (CAS: Chinese Academy of Sciences)H-Index: 7
#2Qihao Yu (CAS: Chinese Academy of Sciences)H-Index: 13
Last. Qingbai Wu (CAS: Chinese Academy of Sciences)H-Index: 25
view all 6 authors...
5 CitationsSource
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