three-dimensional ground settlement induced by metro tunnel excavation considering the influence of group piles
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ID: 244535
2016
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Abstract
Considering the influence of group piles, a prediction model for three-dimensional ground surface settlement induced by circular metro tunnels excavation in incompressible rock masses is proposed based on the stochastic medium theory and the shear displacement method. The surface settlement caused by the metro tunnel opening is divided into two parts. One part is soil mass settlement caused by the metro tunnel opening and calculated by the stochastic medium theory. The other part is the settlement induced by the friction force between the group piles and the soil mass around the metro tunnel cross section and calculated by the shear displacement method. The three-dimensional prediction of the ground surface settlement is obtained by the linear superposition of the two parts. The validation of the proposed prediction approach is proved by comparing with the measured data and the numerical model of the double tunnels under the Puyuan overpass where metro tunnels undercrossed group piles. The effects of buried depth, radial convergences, center distance of double tunnels, position and size of piles, and group piles are analyzed and discussed. The improved prediction approach can be applied to calculate the three-dimensional ground settlement, especially for the metro tunnels crossing through group piles.
| Reference Key |
jin-feng2016mathematicalthree-dimensional
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|---|---|
| Authors | ;Zou Jin-feng;Zhang Yan-jun;Dan Han-cheng |
| Journal | journal of power sources |
| Year | 2016 |
| DOI |
10.1155/2016/4964191
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| URL | |
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