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Method for evaluating influence of pile position deviation uncertainty on anti-seepage effect based on finite elements

An uncertain and finite element technology, applied in the field of finite element-based evaluation of the influence of pile position deviation uncertainty on anti-seepage effect, can solve problems such as pile position deviation, engineering economic loss, water-stop quality accidents, etc.

Active Publication Date: 2020-06-26
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, during the hole-forming process of pile construction, due to design deviation, geological conditions and construction technology, the pile position deviates, resulting in the deviation of the pile foundation, and the inability to form a tight waterproof curtain, resulting in water-stop quality accidents in the project. Cause serious economic loss to the project

Method used

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  • Method for evaluating influence of pile position deviation uncertainty on anti-seepage effect based on finite elements
  • Method for evaluating influence of pile position deviation uncertainty on anti-seepage effect based on finite elements
  • Method for evaluating influence of pile position deviation uncertainty on anti-seepage effect based on finite elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The finite element-based method for assessing the impact of the uncertainty of the pile position deviation on the anti-seepage effect provided by Embodiment 1, such as figure 1 As shown, it mainly includes the following steps:

[0050] Step 1. Obtain the basic information of the model corresponding to the working condition.

[0051]Wherein, one key information in the basic information of the model is the maximum pile position deviation angle. In addition, the basic information of the model also includes: permeability coefficient information, geometric dimension information, the permeability coefficient information includes the seepage coefficient of the pile, the seepage coefficient of the land in the simulation area; the geometric dimension information includes the number of piles, the size of the pile information. The size information of the piles includes pile diameters, pile lengths, and overlapping lengths between piles.

[0052] Step 2. Construct a numerical si...

Embodiment 2

[0117] Example 2 Using the finite element-based evaluation method for the impact of the uncertainty of pile position deviation on the anti-seepage effect proposed in Example 1, evaluate the anti-seepage effect of the pile position deviation on the condition that the maximum pile position deviation angle is 0.5%. The impact of the effect.

[0118] Embodiment 2 first obtains the basic information of the model corresponding to the working condition, including the following two aspects:

[0119] 1.1 Determine the input parameters (permeability coefficient).

[0120] Simulate a specific actual working condition, where the seepage coefficient of the pile is 1×10 -9 m / s, the permeability coefficient of the soil in the simulation area is 1×10 -5 m / s.

[0121] 1.2 Determine the geometric size.

[0122] Eight piles are intercepted in the simulation area, each pile has a diameter of 1.6m, the length of the pile is 20m, and the overlapping length between piles is 300mm. The maximum p...

Embodiment 3

[0126] Example 3 Using the finite element-based method for evaluating the influence of pile position deviation uncertainty on the anti-seepage effect proposed in Example 1, evaluate the anti-seepage effect of the pile position deviation under the working condition that the maximum pile position deviation angle is 1.0%. The impact of the effect.

[0127] Embodiment 3 first obtains the basic information of the model corresponding to the working condition, including the following two aspects:

[0128] (1) Determine the model information.

[0129] 1.1 Determine the input parameters (permeability coefficient).

[0130] Simulate a specific actual working condition, where the seepage coefficient of the pile is 1×10 -9 m / s, the permeability coefficient of the soil in the simulation area is 1×10 -5 m / s.

[0131] 1.2 Determine the geometric size.

[0132] Eight piles are intercepted in the simulation area, each pile has a diameter of 1.6m, the length of the pile is 20m, and the ove...

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Abstract

The invention belongs to the technical field of geotechnical engineering, and discloses a finite element-based method for evaluating the influence of pile position deviation uncertainty on an anti-seepage effect, which comprises the following steps of: obtaining model basic information corresponding to a working condition; constructing a numerical simulation model, and randomly generating a pile position deviation value corresponding to each pile in the numerical simulation model by utilizing a random algorithm; performing finite element mesh generation on the numerical simulation model; basedon the Darcy law, applying boundary conditions are applied to the simulation area; and under a given boundary condition, carrying out finite element solving calculation on the numerical simulation model to obtain the seepage flow passing through the simulation area. The influence of pile position deviation uncertainty on the anti-seepage effect can be quantitatively solved, and reference significance is achieved for prevention and remediation of water stop quality accidents in geotechnical engineering.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a finite element-based method for evaluating the influence of pile position deviation uncertainty on anti-seepage effect. Background technique [0002] In recent years, with the development of my country's society and economy, and the continuous advancement of modernization, practitioners in the field of engineering construction have continued to deepen the research on disaster management, and the fields involved have become more and more extensive. Especially, the research on water disaster management has reached a new height. [0003] In the process of engineering construction, it is often necessary to treat special foundations and strengthen the control of groundwater. At the same time, groundwater control is an important work content of foundation pit support, and its control methods mainly include precipitation, water stop and water collection and open drain...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/13G06F30/10G06F111/10
Inventor 李凯奇刘勇唐小松李典庆
Owner WUHAN UNIV
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