Method for predicting soil deformation caused by saturated soil small-curvature shield construction considering multiple factors
A technology of soil deformation and prediction method, which is applied in the fields of soil drilling, complex mathematical operations, instruments, etc., and can solve problems such as large measured values
Pending Publication Date: 2020-11-13
ZHEJIANG UNIV CITY COLLEGE
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[0004] The purpose of the embodiment of the present invention is a method for predicting soil deformation caused by small curvature shield construction in saturated soil considering multiple factors, so as to solve the problem that the calculated result of the existing calculation method is larger than the measured value
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[0092] figure 1 This is a flowchart of a method for predicting soil body deformation caused by shield construction with small curvature of saturated soil considering multiple factors according to an embodiment of the present invention; this embodiment provides a soil deformation caused by shield construction with small curvature in saturated soil considering multiple factors. The forecasting method includes the following steps:
[0093] Step S101, performing integration processing on the initial solution of the vertical deformation of the soil caused by the concentrated force acting inside the saturated soil, to obtain the vertical deformation of the soil caused by the distributed force on the acting surface of the shield shell;
[0094] Specifically, the factors affecting the soil deformation during the construction of the curved shield tunnel are first determined. The present invention considers the additional thrust on the front of the shield tunnel excavation face, the fri...
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The invention discloses a method for predicting soil deformation caused by saturated soil small-curvature shield construction considering multiple factors, which comprises the following steps: performing integral processing on an initial solution of soil vertical deformation caused by concentrated force acting in saturated soil to obtain soil vertical deformation caused by distribution force on ashield shell acting surface; considering the soil squeezing effect of the cutterhead to obtain soil deformation caused by additional thrust of each partition of the curve shield propelling system; considering the difference of friction force between the inner side and the outer side of the curved shield shell, shield tail slurry spreading and soil body softening characteristics to obtain soil bodydeformation caused by the friction force of the shield shell; considering the nonuniformity of shield tail grouting pressure circumferentially distributed along a shield tail gap to obtain soil deformation caused by the shield tail grouting pressure; obtaining soil deformation caused by soil loss by considering elliptical non-radial movement of the soil and extra overexcavation on the inner sideof the line in the curve shield propelling process; synthesizing the vertical deformation of the soil body caused by each factor to obtain the total deformation of the soil body caused by the small-curvature shield construction of the saturated soil.
Description
technical field [0001] The invention belongs to the technical field of underground engineering, and relates to a method for predicting the vertical deformation of soil mass caused by shield tunnel construction with small curvature of saturated soil under consideration of various construction factors. Background technique [0002] With the rapid development of urban subway tunnel construction, shield construction safety has also received more and more attention and attention. Restricted by site conditions or construction (structure), the construction of subway lines will inevitably appear small curvature curve tunnels. During the construction process of small curvature curve excavation, the disturbance to the soil is more significant than that of straight excavation, which is mainly reflected in the following aspects: (1) The stroke and thrust of the jacks in each sub-zone during the process of curvilinear propulsion are different, resulting in additional excavation surface. ...
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Login to View More IPC IPC(8): G06F30/20G06F17/10E21D9/06G06F119/14
CPCE21D9/06G06F17/10G06F30/20G06F2119/14
Inventor 丁智董毓庆冯丛烈张默爆张霄何绍衡虞键刚黄君彦
Owner ZHEJIANG UNIV CITY COLLEGE