Influence mechanism of large diameter tunnel construction on adjacent buildings
DING Jianqi1, WANG Chencheng2, ZHU Xiangshan1, ZHANG Xiang1, FU Gang1, XU Jingmin2*
1. Jiangsu Intelligent and Green Railway Engineering Research Center, Jiangsu Railway Group Co., Ltd., Nanjing 210049, Jiangsu, China; 2. School of Transportation, Southeast University, Nanjing 211189, Jiangsu, China
Abstract: This research was based on the actual working conditions of buildings in the Jiangnan section crossed by the Shangyuanmen Cross River Tunnel. A three-dimensional numerical simulation finite element model was established to simulate the gradual formation loss process after tunnel construction through displacement control method. After the simulation was completed, the settlement and horizontal displacement of the soil and frame structure, as well as the displacement and strain of each compartment of the frame structure, were extracted to analyze the displacement and strain distribution and development law of the frame structure caused by large-diameter tunnel construction. The research results showed that the settlement of the foundation of building frame structural plates decreased with increasing distance from the tunnel axis, while the horizontal displacement remained approximately at a stable value, which was smaller than the horizontal displacement of the underlying strata; The horizontal displacement distribution law of the frame structure was related to the tunnel crossing relationship. The horizontal displacement of the upper part of the building directly penetrated by the tunnel was smaller than that of the lower part, and the horizontal displacement of the upper part of the building laterally penetrated by the tunnel was larger than that of the lower part. However, the settlement of the frame structure changed relatively little in the vertical direction; The total vertical displacements of frame structure compartments increased with the increase of tunnel volume loss rate, and was mainly composed of shear displacement; The shear strain also increased with the increase of the volume loss rate of the tunnel, and the shear strain of buildings that were penetrated by the tunnel or buildings that were close to the tunnel were generally larger. At the same time, for multi compartment penetrating buildings, the shear strain along the compartment variation curve approximated a sine cosine curve.
丁建奇,王陈成,朱向闪,张翔,傅刚,徐敬民. 大直径隧道施工对临近建筑的作用机制[J]. 隧道与地下工程灾害防治, 2025, 7(1): 22-34.
DING Jianqi, WANG Chencheng, ZHU Xiangshan, ZHANG Xiang, FU Gang, XU Jingmin. Influence mechanism of large diameter tunnel construction on adjacent buildings. Hazard Control in Tunnelling and Underground Engineering, 2025, 7(1): 22-34.
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2025, Vol. 7 
