A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Shear Characteristics and Microstructure of Cemented Soil–Concrete Interface after Artificial Freeze–Thaw under Vibration Loading
In Shanghai, artificial ground freezing (AGF) method is widely used in complex engineering projects like the construction adjacent to subway tunnels. And to reduce frost heave and thaw settlement and reinforce the soil, cement will be used together. In this case, the cemented soil–concrete interface will be formed around the underground structures. Because material properties on both sides of the interface are different and the interface is one of the weak parts, it is necessary to study the shear characteristics of the cemented soil–concrete interface after artificial freeze–thaw under the influence of surrounding vibration load in underground construction for the stability of the whole structure. In this paper, large-scale interface shear tests under vibration loading were carried out, and the effect of curing time and artificial freeze–thaw on interface shear characteristics was studied. At the same time, microstructure of the cemented soil was observed by scanning electron microscope (SEM) tests. The results show that the shear strength of the interface increases with the increase of curing time. The artificial freeze–thaw has a reduction on the shear strength of the interface with vibration loading. Microscopically, artificial freeze–thaw will increase pores and produce some tiny cracks. The results in this paper provide help for further research on the shear characteristics of the cemented soil–concrete interface.
Shear Characteristics and Microstructure of Cemented Soil–Concrete Interface after Artificial Freeze–Thaw under Vibration Loading
In Shanghai, artificial ground freezing (AGF) method is widely used in complex engineering projects like the construction adjacent to subway tunnels. And to reduce frost heave and thaw settlement and reinforce the soil, cement will be used together. In this case, the cemented soil–concrete interface will be formed around the underground structures. Because material properties on both sides of the interface are different and the interface is one of the weak parts, it is necessary to study the shear characteristics of the cemented soil–concrete interface after artificial freeze–thaw under the influence of surrounding vibration load in underground construction for the stability of the whole structure. In this paper, large-scale interface shear tests under vibration loading were carried out, and the effect of curing time and artificial freeze–thaw on interface shear characteristics was studied. At the same time, microstructure of the cemented soil was observed by scanning electron microscope (SEM) tests. The results show that the shear strength of the interface increases with the increase of curing time. The artificial freeze–thaw has a reduction on the shear strength of the interface with vibration loading. Microscopically, artificial freeze–thaw will increase pores and produce some tiny cracks. The results in this paper provide help for further research on the shear characteristics of the cemented soil–concrete interface.
Shear Characteristics and Microstructure of Cemented Soil–Concrete Interface after Artificial Freeze–Thaw under Vibration Loading
Zhou, Jie (author) / Ban, Chao (author) / Liu, Chengjun (author)
20th International Conference on Cold Regions Engineering ; 2023 ; Anchorage, Alaska
Cold Regions Engineering 2024 ; 94-103
2024-05-09
Conference paper
Electronic Resource
English
Freeze-thaw resistant breathable concrete interface agent
| European Patent Office | 2021
Erosion-Resisting Characteristics of Concrete under Freeze-Thaw Action
| British Library Conference Proceedings | 2013