A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Freeze–thaw process of backfill in a dam and its driving factors in seasonally frozen soil area
Abstract Based on the field meteorological and ground temperature in the winter construction process of the world's third highest earth-core rockfill dam for the Lianghekou Hydropower Station (LHS) in Sichuan province, China, the daily and frequent freeze–thaw process of the filling soil in the dam and its driving factors have been studied. Observational data shows that since this area belongs to the high-altitude area and in the mountains, the freeze–thaw process of soil under construction is more complicated, and the freeze–thaw characteristics of soil are different from those under natural environmental conditions. The freeze–thaw characteristics are variable, which includes daily freezing start time (FST), freezing end time (FET), freezing duration (DR), and frozen depth (FD). FST shows relatively large fluctuation over time, and it also shows certain regularity within a short-term range. Solar radiation mainly controls the daily freeze–thaw process, and ground temperature affects air temperature. Under the local environment with little rainfall and snow, the long-term freeze–thaw process is mainly affected by air temperature, wind speed and relative humidity. The freeze–thaw process is affected by the dual factors of the accumulated ground temperature under local conditions and the temperature drop process of the large environment. This research can provide useful reference for the prevention of soil freeze–thaw in a dam for hydropower station construction process in the seasonally frozen soil areas.
Freeze–thaw process of backfill in a dam and its driving factors in seasonally frozen soil area
Abstract Based on the field meteorological and ground temperature in the winter construction process of the world's third highest earth-core rockfill dam for the Lianghekou Hydropower Station (LHS) in Sichuan province, China, the daily and frequent freeze–thaw process of the filling soil in the dam and its driving factors have been studied. Observational data shows that since this area belongs to the high-altitude area and in the mountains, the freeze–thaw process of soil under construction is more complicated, and the freeze–thaw characteristics of soil are different from those under natural environmental conditions. The freeze–thaw characteristics are variable, which includes daily freezing start time (FST), freezing end time (FET), freezing duration (DR), and frozen depth (FD). FST shows relatively large fluctuation over time, and it also shows certain regularity within a short-term range. Solar radiation mainly controls the daily freeze–thaw process, and ground temperature affects air temperature. Under the local environment with little rainfall and snow, the long-term freeze–thaw process is mainly affected by air temperature, wind speed and relative humidity. The freeze–thaw process is affected by the dual factors of the accumulated ground temperature under local conditions and the temperature drop process of the large environment. This research can provide useful reference for the prevention of soil freeze–thaw in a dam for hydropower station construction process in the seasonally frozen soil areas.
Freeze–thaw process of backfill in a dam and its driving factors in seasonally frozen soil area
Ren, Xiuling (author) / Yu, Qihao (author) / Yue, Pan (author) / You, Yanhui (author) / Zhang, Zhenyu (author)
2022
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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