An estimation of subsurface settlement due to shield tunneling |
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| Affiliation: | 1. School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China;2. Key Laboratory of Geohazard Prevention of Hilly Mountains, Ministry of Land and Resources, Fuzhou 350002, China;3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China;4. Department of Civil Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China;1. Delft University of Technology, Geo-Engineering Section, Stevinweg 1, 2628 CN Delft, The Netherlands;2. Hanoi University of Mining and Geology, Faculty of Civil Engineering, Viet Nam;1. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;2. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China;3. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China;1. Dept. Civil and Environmental Engineering, Manhattan College, Riverdale, NY 10471, United States;2. Dept. Civil and Environmental Engineering, MIT, Cambridge, MA 02139, United States;1. School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China;2. Department of Civil and Environmental Engineering, National University of Singapore, Singapore;3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;4. Department of Civil Engineering, Shanghai University, Shanghai 200444, China |
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| Abstract: | An empirical method based on the normal distribution function is proposed to estimate the magnitude and extent of subsurface settlement associated with shield tunneling. Based on field measurement data, empirical relationships are established between surface and subsurface settlement troughs. Assuming the surface settlement due to tunneling could be obtained by the analytical, numerical, or field monitoring method, based on these relationships, the range of subsurface-settlement can be easily estimated. Twenty three sets of measured subsurface settlement profiles associated with tunneling with open, slurry and earth-pressure-balance shields are compared with the predicted curves. It is concluded that the application of normal probability function can be extended to estimate the subsurface settlement due to shield tunneling. The width of the subsurface settlement trough decreases with increasing depth, and the maximum subsurface settlement increases with increasing depth. The subsurface settlement curves calculated using the proposed method are in fairly good agreement with field measurements for various types of shield machines, depths and diameters. |
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| Keywords: | Empirical method Normal distribution Surface settlement Subsurface settlement Shield tunneling |
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