Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Strain characteristics of reinforced soft clay around tunnel under metro loads
This study investigates the Strain characteristics of reinforced soft clay surrounding a tunnel subjected to cyclic loading, employing the Global Digital Systems cyclic triaxial test on the saturated reinforced clay near Shanghai Metro Line 4’s Hailun Road station. Initially, the study examines the impacts of frequency, dynamic stress amplitude (DSA), and loading cycles on cumulative plastic strain. Following this, the orthogonal design method was employed to organize tests, and an evaluation method for assessing soil strain was developed through mathematical statistical analysis. The results indicate at the constant vibration frequency, cumulative plastic strain increases with an increase in DSA and decreases with as load frequency increases. DSA is the primary factor influencing the axial deformation of subway tunnels, whereas the interaction between load frequency and vibration frequency is negligible. The findings suggest that measures to prevent and control subway tunnel settlement should concentrate on DSA during the early stages of subway operation.
A novel concept and calculation method for the influence rate of axial deformation of clay mass under cyclic loads were introduced, enabling the determination of a parameter’s significant influence on deformation.
The early stage of subway operation is the focus for preventing engineering geological disasters.
Dynamic stress amplitude (DSA) is the primary factor influencing the axis deformation of subway tunnels, while the interaction between load frequency and vibration frequency is negligible.
Strain characteristics of reinforced soft clay around tunnel under metro loads
This study investigates the Strain characteristics of reinforced soft clay surrounding a tunnel subjected to cyclic loading, employing the Global Digital Systems cyclic triaxial test on the saturated reinforced clay near Shanghai Metro Line 4’s Hailun Road station. Initially, the study examines the impacts of frequency, dynamic stress amplitude (DSA), and loading cycles on cumulative plastic strain. Following this, the orthogonal design method was employed to organize tests, and an evaluation method for assessing soil strain was developed through mathematical statistical analysis. The results indicate at the constant vibration frequency, cumulative plastic strain increases with an increase in DSA and decreases with as load frequency increases. DSA is the primary factor influencing the axial deformation of subway tunnels, whereas the interaction between load frequency and vibration frequency is negligible. The findings suggest that measures to prevent and control subway tunnel settlement should concentrate on DSA during the early stages of subway operation.
A novel concept and calculation method for the influence rate of axial deformation of clay mass under cyclic loads were introduced, enabling the determination of a parameter’s significant influence on deformation.
The early stage of subway operation is the focus for preventing engineering geological disasters.
Dynamic stress amplitude (DSA) is the primary factor influencing the axis deformation of subway tunnels, while the interaction between load frequency and vibration frequency is negligible.
Strain characteristics of reinforced soft clay around tunnel under metro loads
Discov Appl Sci
Lin, Zhongcai (Autor:in) / Yan, Chunling (Autor:in) / Sang, Biaowei (Autor:in) / Tang, Yiqun (Autor:in)
20.07.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Strain characteristics of reinforced soft clay around tunnel under metro loads
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