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A New Calculation Method for Tunneling-Caused Stratum Settlement
https://orcid.org/https://orcid.org/0000-0002-7215-8590
https://orcid.org/https://orcid.org/0000-0002-6530-7236
https://orcid.org/https://orcid.org/0000-0002-0817-4369
https://orcid.org/https://orcid.org/0000-0002-3215-5942
https://orcid.org/https://orcid.org/0000-0002-1019-9450
To improve the prediction accuracy for the stratum settlement induced by tunnels and obtain a theoretical method for determining the influence radius of settlement, a new empirical formula for the surface settlement curve is proposed in this study, and the slice method is introduced into the calculation of the influence radius of settlement. It is assumed that the disturbance boundary of the tunnel is a circular arc surface, the disturbed soil is divided into multiple slices, and the sliding force and resistance on the circular arc are obtained through a stress analysis of the slices. An arc with the same values of the sliding force and resistance can be determined as the actual disturbance boundary of the overlying strata as formed by the subsurface tunneling. On this basis, the influence radius of settlement and maximum settlement at different depths can be determined, and the settlement curve can be depicted by substituting the influence radius and maximum settlement into the expression of the settlement curve. The rationality of the proposed method is verified based on four sets of measured data. The surface settlement curves and the settlements at different depths on the center line of the tunnel obtained by the new method are generally consistent with the measured data.
A New Calculation Method for Tunneling-Caused Stratum Settlement
https://orcid.org/https://orcid.org/0000-0002-7215-8590
https://orcid.org/https://orcid.org/0000-0002-6530-7236
https://orcid.org/https://orcid.org/0000-0002-0817-4369
https://orcid.org/https://orcid.org/0000-0002-3215-5942
https://orcid.org/https://orcid.org/0000-0002-1019-9450
To improve the prediction accuracy for the stratum settlement induced by tunnels and obtain a theoretical method for determining the influence radius of settlement, a new empirical formula for the surface settlement curve is proposed in this study, and the slice method is introduced into the calculation of the influence radius of settlement. It is assumed that the disturbance boundary of the tunnel is a circular arc surface, the disturbed soil is divided into multiple slices, and the sliding force and resistance on the circular arc are obtained through a stress analysis of the slices. An arc with the same values of the sliding force and resistance can be determined as the actual disturbance boundary of the overlying strata as formed by the subsurface tunneling. On this basis, the influence radius of settlement and maximum settlement at different depths can be determined, and the settlement curve can be depicted by substituting the influence radius and maximum settlement into the expression of the settlement curve. The rationality of the proposed method is verified based on four sets of measured data. The surface settlement curves and the settlements at different depths on the center line of the tunnel obtained by the new method are generally consistent with the measured data.
A New Calculation Method for Tunneling-Caused Stratum Settlement
https://orcid.org/https://orcid.org/0000-0002-7215-8590
https://orcid.org/https://orcid.org/0000-0002-6530-7236
https://orcid.org/https://orcid.org/0000-0002-0817-4369
https://orcid.org/https://orcid.org/0000-0002-3215-5942
https://orcid.org/https://orcid.org/0000-0002-1019-9450
To improve the prediction accuracy for the stratum settlement induced by tunnels and obtain a theoretical method for determining the influence radius of settlement, a new empirical formula for the surface settlement curve is proposed in this study, and the slice method is introduced into the calculation of the influence radius of settlement. It is assumed that the disturbance boundary of the tunnel is a circular arc surface, the disturbed soil is divided into multiple slices, and the sliding force and resistance on the circular arc are obtained through a stress analysis of the slices. An arc with the same values of the sliding force and resistance can be determined as the actual disturbance boundary of the overlying strata as formed by the subsurface tunneling. On this basis, the influence radius of settlement and maximum settlement at different depths can be determined, and the settlement curve can be depicted by substituting the influence radius and maximum settlement into the expression of the settlement curve. The rationality of the proposed method is verified based on four sets of measured data. The surface settlement curves and the settlements at different depths on the center line of the tunnel obtained by the new method are generally consistent with the measured data.
A New Calculation Method for Tunneling-Caused Stratum Settlement
KSCE J Civ Eng
Wang, Junbao (author) / Zhou, Pengyuan (author) / Song, Zhanping (author) / Li, Shihao (author) / Zhang, Qiang (author)
KSCE Journal of Civil Engineering ; 26 ; 2624-2640
2022-06-01
17 pages
Article (Journal)
Electronic Resource
English
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