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Influence of Shield Shell Friction on Surrounding Soil Mass Properties
(1 School of Civil Engineering, Tianjin University, Tianjin 300072; 2 College of Civil Engineering and Architecture of Hainan University, Haikou 570228)
Abstract Based on the left line of the shield running tunnel from Dongnanjiao station to Jianguo station on the
Tianjin Metro line 2, a calculation of surface settlement induced by shield driving was carried out by ABAQUS, and verification was performed on the basis of measured results to further analyze the influence of different shield shell frictions on the deformation and force of the surrounding soil mass during shield driving for a certain thrust of the work face. The results show that the horizontal displacement and additional stress toward the direction of driving are greatly influenced by the function of the shield shell friction, especially at the most sensitive section at the shield head and near the shield tail; when the distance from the tunnel is equivalent to the tunnel length or greater, the additional stress of the soil mass due to shield shell friction decreases and can be disregarded.
Abstract：
Based on the left line of the shield running tunnel from Dongnanjiao station to Jianguo station on the
Tianjin Metro line 2, a calculation of surface settlement induced by shield driving was carried out by ABAQUS, and verification was performed on the basis of measured results to further analyze the influence of different shield shell frictions on the deformation and force of the surrounding soil mass during shield driving for a certain thrust of the work face. The results show that the horizontal displacement and additional stress toward the direction of driving are greatly influenced by the function of the shield shell friction, especially at the most sensitive section at the shield head and near the shield tail; when the distance from the tunnel is equivalent to the tunnel length or greater, the additional stress of the soil mass due to shield shell friction decreases and can be disregarded.
2017, Vol. 54 