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Prediction Method of Ground Settlements Induced by Subway Tunnelling in the Loess Region

Author: HanDong
Tutor: SuSanQing
School: Xi'an University of Science and Technology
Course: Municipal Engineering
Keywords: Loess areas Subway Tunnel Ground movement and deformation Stochastic medium theory Shallow Excavation
CLC: U456.3
Type: Master's thesis
Year: 2011
Downloads: 45
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Abstract


Although the construction of the subway tunnel to reduce the impact of ground transportation during the construction phase , but will inevitably be the rock and soil disturbance, caused by surface movement and deformation may affect ground buildings and existing pipeline facilities , ground surface subsidence reaches a certain level when will affect the normal use of the safety of the buildings on the surface and underground pipelines . In order to reduce the damage caused by surface movement and deformation caused by tunnel construction , it is necessary to correct its law and thus make a reliable estimate can thus choose the best construction methods and develop a comprehensive set of measures to ensure that the construction security the regional ground buildings and underground pipelines and other important facilities . In this paper, based on the theory of classical random media were established analytical calculation method of surface movement and deformation caused by the single and dual - circular cross-section shield tunnel , and revised according to Peck empirical formula given tunnel upper wall rock the angle of the principal effects of the correction method , the calculation results with experimental results closer ; using standard transformation principle , draw a random medium theory to explain the formula for the polar coordinate expression it caused by the earth's surface for arbitrary complex hole -shaped and large section tunnel project movement and deformation calculation is equally applicable to expand the application range of the analytical method . The forecast method to predict surface movement and deformation of Xi'an Metro Line 1 project single and dual shield subway tunnel the shallow overburden Hrdaya circular section tunnel , arched tunnel and a large section tunnel construction , and compared with the measured results , we can see this article prediction method of calculation results with experimental results are in good agreement , allows the theoretical analysis in engineering practice .

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CLC: > Transportation > Road transport > Tunnel project > Tunnel observations and experimental > Tunnel construction and use of monitoring
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