In order to study the influence of deep foundation pit construction on the pile foundation of adjacent existing stations, taking the foundation pit expansion project of underground station hall of Beijing Metro Line 13 as an example, the numerical simulation method and the control variable method were used to quantitatively analyze the influence of foundation pit excavation on the pile foundation displacement of existing stations under the change of parameters such as the distance between foundation pit and pile foundation, the excavation depth of foundation pit and the stiffness of retaining structure. The results show that the decrease in the distance between the foundation pit and the pile foundation and the increase in the excavation depth can significantly increase the horizontal and vertical displacement of the pile foundation. When the distance exceeds 9m, the change rate of vertical displacement is obviously reduced. When the excavation depth exceeds 12 m, the change rate of vertical displacement increases obviously. The stiffness of the retaining structure and the displacement of the pile foundation are basically negatively correlated, and the rate of displacement decreases with the increase in stiffness.

Wang Haitao, Wang Haoyu, Zhao Zhihao, Zheng Xiang. Study on the Influence of Deep Foundation Pit Construction on the Pile Foundation of Adjacent Existing Stations. Academic Journal of Engineering and Technology Science (2024) Vol. 7, Issue 2: 123-129. https://doi.org/10.25236/AJETS.2024.070218.

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