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A platform for research: civil engineering, architecture and urbanism
Research on the Influence and Control Measures of Excavation of Deep Foundation Pit Adjacent to Rail Transit
Guizhou Province was a typical red clay area, and its high plasticity increased the difficulty of controlling the deformation of foundation pits. When the foundation pit was excavated, the lateral displacement of the soil along the direction of the foundation pit occurs, and the rail transit structure produced large additional stress and bending moment, which would affect the rail safety. Firstly, in this paper, the finite element method is used to analyze the influence of unsupported excavation on the track structure. Then, in view of the possible impact of foundation pit excavation, three kinds of targeted supporting systems were proposed, and the supporting effect of each scheme was studied and selects the optimal scheme. Finally, based on the surface deformation, deep displacement and optical fiber measured results, the supporting effect of the selected optimal supporting scheme is compared and demonstrated. The conclusions are as follows: the excavation of foundation pit without support has a severe impact on the environment and seriously affects the safety of track structure; Compared with "double row pile" support system, "single/double row pile + anchor cable" support system has the most ideal deformation control effect. The monitoring results show that the selected supporting scheme has obvious effect on environmental deformation control, and the calculated results are in good agreement with the measured data.
Research on the Influence and Control Measures of Excavation of Deep Foundation Pit Adjacent to Rail Transit
Guizhou Province was a typical red clay area, and its high plasticity increased the difficulty of controlling the deformation of foundation pits. When the foundation pit was excavated, the lateral displacement of the soil along the direction of the foundation pit occurs, and the rail transit structure produced large additional stress and bending moment, which would affect the rail safety. Firstly, in this paper, the finite element method is used to analyze the influence of unsupported excavation on the track structure. Then, in view of the possible impact of foundation pit excavation, three kinds of targeted supporting systems were proposed, and the supporting effect of each scheme was studied and selects the optimal scheme. Finally, based on the surface deformation, deep displacement and optical fiber measured results, the supporting effect of the selected optimal supporting scheme is compared and demonstrated. The conclusions are as follows: the excavation of foundation pit without support has a severe impact on the environment and seriously affects the safety of track structure; Compared with "double row pile" support system, "single/double row pile + anchor cable" support system has the most ideal deformation control effect. The monitoring results show that the selected supporting scheme has obvious effect on environmental deformation control, and the calculated results are in good agreement with the measured data.
Research on the Influence and Control Measures of Excavation of Deep Foundation Pit Adjacent to Rail Transit
Jiang, Bo (author) / Wang, Jing (author) / Long, Wanxue (author) / Luo, Xiehui (author)
2022-04-22
631834 byte
Conference paper
Electronic Resource
English
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