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Numerical simulation analysis method for the influence of groundwater on the construction of subway shield tunnels

A subway shield and numerical simulation technology, applied in special data processing applications, geometric CAD, design optimization/simulation, etc., can solve the problems of less groundwater research, less measured data, and long impact periods

Active Publication Date: 2021-02-05
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, in the actual subway shield tunnel construction project, the impact period of groundwater on shield tunnel excavation is relatively long, but the measured data are few, which makes the research related to groundwater less

Method used

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  • Numerical simulation analysis method for the influence of groundwater on the construction of subway shield tunnels
  • Numerical simulation analysis method for the influence of groundwater on the construction of subway shield tunnels
  • Numerical simulation analysis method for the influence of groundwater on the construction of subway shield tunnels

Examples

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Embodiment

[0109] In this embodiment, a shield tunnel construction section in a subway section of the north extension section of Guangzhou Metro Line 3 is selected, and the simulation is performed with the help of the finite difference software FLAC3D.

[0110] Such as figure 1 As shown, the numerical simulation analysis method of the influence of groundwater on subway shield tunnel construction in this embodiment includes the following steps:

[0111] 1) According to the construction section of the subway shield tunnel, the numerical simulation of the shield tunnel excavation is carried out, and the initial model is established

[0112] In this example, FLAC (Fast Lagrangian Analysis of Continua) 3D is used to establish a model. FLAC3D is a display difference software for studying the mechanism behavior of a three-dimensional continuum under various internal and external influences, which reaches equilibrium or stable plastic flow state. FLAC3D software In the form of command-driven, t...

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Abstract

The invention discloses a numerical simulation analysis method for the influence of groundwater on the construction of a subway shield tunnel, comprising: establishing an initial model; establishing an undrained analysis model; comparing the soil settlement values ​​calculated by the initial model and the undrained analysis model, Obtain the influence of the additional stress brought by the groundwater on the settlement and deformation of the soil; establish the fluid-solid coupling model; compare the soil settlement values ​​calculated by the fluid-solid coupling model, the undrained model and the initial model, and obtain the soil mass The influence of drainage consolidation on soil settlement and deformation; by changing the fluid-solid coupling model’s permeability coefficient and groundwater level, different finite difference models are established to obtain the surface subsidence values ​​under different permeability coefficients and groundwater levels, and further obtain the permeability coefficient and the impact of groundwater levels on land subsidence. The invention analyzes the influence of underground water on the shield construction of the subway tunnel so as to protect the engineering of the construction section of the subway shield tunnel.

Description

technical field [0001] The invention relates to a numerical simulation analysis method, in particular to a numerical simulation analysis method for the influence of groundwater on the construction of a subway shield tunnel, and belongs to the field of analysis of the influence of groundwater on the construction of a subway shield tunnel. Background technique [0002] Since the beginning of the 21st century, with the development of modern science and technology and the increase of population, human beings' demand for living space has been increasing. Therefore, the rational development and utilization of underground space has become the key development direction of the city in the future. At the same time, with the rapid development of urban subway construction technology and the further development and utilization of underground space, subway has become an important means of transportation to relieve the traffic pressure of urban population. [0003] There are many methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/13
CPCG06F30/13G06F30/23
Inventor 袁鸿黄东永李善倾
Owner JINAN UNIVERSITY
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