Effect of freeze–thaw cycles on the deformation behavior of gravelly soil in the 300 m-high earth core rockfill dam

2021 ◽  
Vol 80 (8) ◽  
Author(s):  
Feng Ming ◽  
Xiu-Ling Ren ◽  
Jin-guo Wang ◽  
Zhi-wei Zhou ◽  
En-Long Liu ◽  
...  
Keyword(s):  
Deformation Behavior ◽  
Freeze Thaw ◽  
Earth Core ◽  
Rockfill Dam ◽  
Gravelly Soil ◽  
Core Rockfill Dam

scholarly journals Study on the Freeze-Thaw Problems in the Winter Construction of the Lianghekou Earth-Core Rockfill Dam and the Countermeasures for Prevention

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Qihao Yu ◽  
Xiu-Ling Ren ◽  
Pan Yue ◽  
Gui-Ke Zhang ◽  
Jun-Feng Wang ◽  
...  
Keyword(s):  
Adverse Effect ◽  
Frozen Soil ◽  
Construction Process ◽  
Construction Quality ◽  
Frozen Soils ◽  
Freeze Thaw ◽  
Earth Core ◽  
Rockfill Dam ◽  
Core Rockfill Dam

Winter construction in seasonally frozen soil areas is inevitable. The variation of ambient temperature causes the freeze-thaw of the filling soils and its impact is significant, and whether the countermeasures can be effectively established and adopted is particularly important for the management and control of the construction quality of the project. This paper conducts systematic research based on the winter construction process of the dam core wall of the Lianghekou Hydropower Station, which is the third highest earth-core rockfill dam in the world under construction. The results show that for the construction site in the seasonally frozen soil area, there is a development process of the short-term frozen soils for the filling soils under the environment with low temperature in winter. The soil underwent a high-frequency freeze-thaw process wherein it was frozen at night and completely thawed during the day. During the freezing process, a large number of thin-layered segregated ice developed inside the soil to form a thin-layered or integral cryostructure, which will have an adverse effect on the engineering properties and the quality of the filling soils. And, the field tests demonstrate that the filling compaction degree of the frozen soils is difficult to meet the designed requirements. In order to effectively cope with the adverse effect of the freeze-thaw on the construction quality during the construction process, based on the analysis of the freeze-thaw characteristics of soils and its influence, and the energy exchange process of soils on-site, the principles and methods for establishing the freeze prevention system during the winter construction process are established, and a comprehensive monitoring system suitable for on-site is established in this paper. This research will provide an important reference for the scientific management and efficiency improvement of the winter construction process of the dams in cold regions.

Deformation Characteristics and Control Techniques at the Shiziping Earth Core Rockfill Dam

2016 ◽  
Vol 142 (2) ◽  
pp. 04015069 ◽  
Author(s):  
Zhang Han ◽  
Chen Jiankang ◽  
Hu Shengwei ◽  
Xiao Yazi ◽  
Zeng Beijia
Keyword(s):  
Deformation Characteristics ◽  
Control Techniques ◽  
Earth Core ◽  
Rockfill Dam ◽  
And Control ◽  
Core Rockfill Dam

Research on New Dam Structure for High Earth Core Rockfill Dam on Thick Overburden

IACGE 2013 ◽  
2013 ◽  
Author(s):  
Han Xu ◽  
Bin Huang ◽  
Xibao Rao ◽  
Jiajun Pan ◽  
Yun Chen
Keyword(s):  
Earth Core ◽  
Rockfill Dam ◽  
Thick Overburden ◽  
Core Rockfill Dam

Real-time compaction quality monitoring of high core rockfill dam

2011 ◽  
Vol 54 (7) ◽  
pp. 1906-1913 ◽  
Author(s):  
DengHua Zhong ◽  
DongHai Liu ◽  
Bo Cui
Keyword(s):  
Real Time ◽  
Quality Monitoring ◽  
Rockfill Dam ◽  
Core Rockfill Dam
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