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Device and method for analyzing reliability of complex geotechnical project

A technology of geotechnical engineering and analysis device, applied in the field of geotechnical engineering, can solve problems such as adjusting the step size, and achieve the effects of reducing workload, convenient reliability analysis, and avoiding data errors and loss.

Active Publication Date: 2015-05-13
TONGJI UNIV
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Problems solved by technology

During the iterative calculation of the response surface method, negative numbers are not allowed in the geotechnical parameters during the deterministic analysis. Since the iterative calculation is often performed manually, the sampling can be adjusted in time at each iteration The step size ensures that there are no negative numbers in the sampling points, but in order to achieve automatic calculation of reliability, the computer cannot intelligently adjust the step size in time for each step. Therefore, this method proposes a new response surface sampling method to ensure that all during the iterative calculation process The sampling points are all positive

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  • Device and method for analyzing reliability of complex geotechnical project
  • Device and method for analyzing reliability of complex geotechnical project
  • Device and method for analyzing reliability of complex geotechnical project

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Embodiment 1

[0043] Such as figure 1 As shown, a complex geotechnical engineering reliability analysis device of the present invention consists of a center point conversion module 101, a sampling point generation module 102, a sampling point rotation module 103, a finite element analysis module 104, a reliability calculation module 105 and a process control module 106, wherein the central point conversion module 101, sampling point generation module 102, sampling point rotation module 103, reliability calculation module 105 and process control module 106 can all be realized by the functions of the numerical calculation software Matlab; and the finite element analysis module 104 Then the finite element analysis and calculation can be carried out through the finite difference program FLAC3D; since the data exchange of sampling points and limit equation values ​​needs to be carried out between Matlab and FLAC3D, the text file is used to realize the exchange between the two programs in this emb...

Embodiment 2

[0051] The reliability analysis device and principle proposed by the present invention will be introduced below by taking a soft soil foundation reinforced with deep mixing piles as an example. The layout of the investigated deep mixing piles and the distribution of soil layers are as follows: figure 2 and image 3 shown. The foundation soil is divided into two layers, the clay layer from 0 to -12.1 meters, and the silty clay layer from -12.1 to -17.6 meters. The pile diameter of the deep mixing pile is 0.9m, the pile spacing is 1.6m, and the pile length is 14m. The load on the foundation is 85kPa.

[0052] with E s 、c s , Represent the elastic modulus, cohesion and internal friction angle of clay respectively, and E p 、c p , Represent the modulus, cohesion and internal friction angle of the deep-stirred pile, respectively. The soil layer and deep mixing pile parameters in this embodiment are shown in Table 1. The mechanical properties of soft soil and reinforced...

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Abstract

The invention relates to a device and method for analyzing the reliability of a complex geotechnical project. The device comprises a center point switching module, a sampling point generating module, a sampling point rotating module, a finite element analyzing module, a reliability calculating module and a flow controlling module. The method includes the following steps: center point switching, sampling point generating, sampling point rotating, finite element analyzing, reliability calculating and flow controlling. Compared with the prior art, an improved response surface method solves the problems that an original response method is sensitive to step length values, the step length needs to be continuously and manually adjusted in the iterative process, and minus sampling points exist due to the excessively-large step length values, and a theoretical basis is provided for achieving automatic coupling calculation of reliability analysis and deterministic analysis in the complex geotechnical project; by means of the device and method, the workloads of reliability calculation of the complex geotechnical project can be reduced, and automatic coupling calculation of the reliability and the determinacy of the complex geotechnical project can be achieved.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a reliability analysis device and method for complex geotechnical engineering. Background technique [0002] In order to consider the impact of various uncertainties on geotechnical engineering, reliability theory has been widely used in various geotechnical engineering. Geotechnical engineering reliability analysis involves the coupling of geotechnical models and reliability calculations. For complex geotechnical engineering problems, the mechanism of force deformation is quite complex and must be analyzed with the help of commercial software. However, the existing geotechnical engineering software can only perform deterministic analysis, but cannot perform reliability analysis. How to analyze the reliability of complex geotechnical engineering is a technical bottleneck in the field of geotechnical engineering risk analysis. If the Monte Carlo method is used to calcula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张洁陈宏智马建增
Owner TONGJI UNIV
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