Effects of salinized deterioration and aeolian ullage on soils in undercutting areas of earthen ruins in arid regions (Ⅲ): capillary process

CUI Kai; ZHAO Xiao-zheng; ZHU Ming-ji; CHEN Wen-wu; HAN Wen-feng

doi:10.11779/CJGE202211010

Volume 44 Issue 11

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Chinese Journal of Geotechnical Engineering > 2022 > 44(11): 2043-2051. > DOI: 10.11779/CJGE202211010

CUI Kai, ZHAO Xiao-zheng, ZHU Ming-ji, CHEN Wen-wu, HAN Wen-feng. Effects of salinized deterioration and aeolian ullage on soils in undercutting areas of earthen ruins in arid regions (Ⅲ): capillary process[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(11): 2043-2051. DOI: 10.11779/CJGE202211010

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Effects of salinized deterioration and aeolian ullage on soils in undercutting areas of earthen ruins in arid regions (Ⅲ): capillary process

1.
Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China
2.
Key Laboratory of Mechanics on Disaster and Environment in Western China (Lanzhou University), Ministry of Education, Lanzhou 730000, China

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Received Date: October 14, 2021
Available Online: December 08, 2022

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Abstract

Abstract

The capillary process is the main way of salinized deterioration effect and the important premise of aeolian ullage effect in undercutting areas at the bottom of earthen ruins in arid regions. By analyzing the real-time monitoring data of changes in the moisture content in the ground and undercutting areas at three typical earthen sites under normal weather in four seasons, rainfall and snow conditions, it is found that the rainfall (snow) weather is the inducing factor for the capillary process in the undercutting areas. Combined with the laboratory capillary simulation experiment, it is shown that the plastic limit of soil is the critical condition for the capillary process in the undercutting areas. Then based on the sampling and simulation experimental results of undercutting areas of 15 earthen ruins with different ages in arid regions, a theoretical model for the maximum height of capillary water rise is established by introducing the variables such as capillary water absorption, evaporation rate, etc. The calculated results by the theoretical model show that the absolute errors are less than 1 cm when the error correction coefficient is ε=0.9. The above researches provide important theoretical support and reference for the development mechanism and prevention of diseases in undercutting areas at the bottom of earthen ruins in arid regions.
- undercutting area,
- capillary process,
- inducing factor,
- critical condition,
- height model

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References

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