Numerical simulation analysis method for influence of adjacent underpinning pile foundation by shield construction

A numerical simulation and analysis method technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as the lack of a perfect analysis system, and achieve the effect of a wide range of engineering application prospects

Inactive Publication Date: 2014-10-15
JINAN UNIVERSITY
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Problems solved by technology

However, the research on the mutual influence between the tunnel construction and the surrounding adjacent structures has only been carried out gradually in recent years, and a complete analysis system has not yet been formed, and the factors

Method used

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  • Numerical simulation analysis method for influence of adjacent underpinning pile foundation by shield construction
  • Numerical simulation analysis method for influence of adjacent underpinning pile foundation by shield construction
  • Numerical simulation analysis method for influence of adjacent underpinning pile foundation by shield construction

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Embodiment 1

[0041] Such as figure 1 As shown, this embodiment takes a project with a three-span and nine-story frame structure under the left line of a tunnel on Guangzhou Metro Line 6 as an example. The pile foundation underpinning technology is now used to underpin the affected pile foundation at the lower part of the structure to control the impact of shield excavation on the pile foundation of the structure. The numerical simulation analysis method for the impact of shield construction on adjacent underpinning pile foundations in this embodiment includes the following steps:

[0042] 1) According to the engineering scheme of this embodiment, select the appropriate soil block size, determine the materials and parameters of the tunnel lining, grouting layer and underpinning pile foundation, and determine the transverse stiffness reduction factor of the tunnel lining and the grouting layer Optimizing the processing of the pile foundation, using the large-scale finite element calculation...

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Abstract

The invention discloses a numerical simulation analysis method for the influence of adjacent underpinning pile foundation by shield construction. The method comprises the following steps: (1) according to a specific underpinning engineering proposal, a finite element model of a pile foundation underpinning single pile is established; (2) a shield excavation process is simulated, comparative analysis is carried out for underpinning pile foundation deformation and hypogenic change condition before tunnel excavation, during tunnel excavation and after tunnel excavation; (3) through changing parameters of each engineering factor in the specific underpinning engineering proposal, finite element models under multiple groups of different working conditions are established, comparative analysis is carried out for underpinning pile foundation deformation and hypogenic change condition under different working conditions, and an influence effect rule of each engineering factor to the underpinning pile foundation after tunnel excavation is obtained; (4) according to the specific underpinning engineering proposal, finite element model of multiple pile foundation underpinning piles are established, and the feasibility of the underpinning engineering proposal is verified by utilizing the underpinning pile foundation deformation and hypogenic change condition. The method has the innovative significance, and the engineering application prospects are wide.

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 shield construction on adjacent underpinning pile foundations, and belongs to the field of analysis of the influence of shield construction on adjacent underpinning pile foundations. Background technique [0002] With the vigorous development of society and economy, the subway has become an important means of transportation, and the subway tunnel is usually excavated by the shield method. During construction, the interaction between the shield machine, the stratum structure and the surrounding buildings is a very important The complex process involves many controllable and uncontrollable factors that affect the construction effect, and it is difficult to predict. Therefore, there are inevitably some deficiencies and deficiencies in the current research discussion. The main problems are: [0003] 1) The empirical...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 袁鸿刘熙杨雄飞韩军
Owner JINAN UNIVERSITY
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