Mechanism and influence range of stress arching effect of CFRD in narrow valley regions

YANG Chao; XUE Hai-bin; DANG Fa-ning; WANG hui

doi:10.11779/CJGE2021S1039

Volume 43 Issue S1

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Chinese Journal of Geotechnical Engineering > 2021 > 43(S1): 214-218. > DOI: 10.11779/CJGE2021S1039

YANG Chao, XUE Hai-bin, DANG Fa-ning, WANG hui. Mechanism and influence range of stress arching effect of CFRD in narrow valley regions[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S1): 214-218. DOI: 10.11779/CJGE2021S1039

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Mechanism and influence range of stress arching effect of CFRD in narrow valley regions

1.
School of Civil Engineering, North Minzu University, Yinchuan 750021, China
2.
State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China
3.
Shaanxi Province Water Conservancy and Electric Power Survey and Design Institute, Xi'an 710001, China

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Received Date: December 14, 2020
Available Online: December 05, 2022

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Abstract

Abstract

Influenced by canyon topography, the CFRD built in canyon areas will cause the stress arching effect in the rivercrossing direction.The stress arching effect makes it difficult for the rockfill to be fully compacted at the bottom of the dam.Starting from the forming conditions, 3-D FEM is used to compare the distribution of the major and minor principal stresses of the CFRD with wide narrow valley, in order to reveal the formation mechanism of internal stress arching effect of CFRD in canyon regions.The distribution form and range of reasonable arch axis of stress arching effect at the bottom of CFRD are studied.The bottom rockfill at the center of the valley is most affected by the stress arching effect.The influence area accounts for about 23%of the overall height of the dam.The research results may provide a reference for reducing the adverse effect of stress arching effect of CFRD in canyon area.
- narrow valley,
- CFRD,
- stress arching effect,
- influence range

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References

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