Dynamic Prediction Method of Ground Deformation of Large-scale Raw Material Stockpile under Staged Heap Loading Preloading

A foundation deformation and surcharge preloading technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inaccuracies, and achieve small calculations, save engineering investment costs, and high accuracy Effect

Active Publication Date: 2018-06-29
WUHAN SURVEYING GEOTECHN RES INST OF MCC
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of inaccuracy in the prediction of construction settlement and post-construction settlement in the process of grading preloading and preloading, and adopt the Nelder-Mead algorithm combined with an accurate penalty function to provide an accurate calculation of the deformation of the raw material storage ground under preloading and preloading. dynamic prediction method

Method used

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  • Dynamic Prediction Method of Ground Deformation of Large-scale Raw Material Stockpile under Staged Heap Loading Preloading
  • Dynamic Prediction Method of Ground Deformation of Large-scale Raw Material Stockpile under Staged Heap Loading Preloading
  • Dynamic Prediction Method of Ground Deformation of Large-scale Raw Material Stockpile under Staged Heap Loading Preloading

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Embodiment 1

[0032] The stock yard of a wharf is close to the Yangtze River, and the geomorphic unit belongs to the first-level terrace of the Yangtze River; the stock yard is divided into three strips, with an area of ​​510.7×35m 2 、475.5×35m 2 、400×25m 2 ; The slag in the material area is piled up in a step-by-step manner, with heights of 6.0m, 9.0m, 11.0m and 13.0m; foundation treatment by pressing method; 28 monitoring points for subsidence at the center of the material strip and 58 monitoring points for surface displacement at the edge of the material strip have been arranged in the stockyard, such as image 3 shown. In order to verify that the dynamic prediction method for the foundation deformation of the raw material site under heap preloading provided by the present invention is reasonable and effective, a two-dimensional model is established for calculation. There are five parameters to be inverted, namely b1: the coefficient of elastic modulus converted from soil compressive ...

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Abstract

The invention provides a dynamic prediction method for large raw material storage yard foundation deformation under graded preloading. The method includes the following steps of firstly, collecting and processing monitoring data of foundation deformation under preloading; secondly, establishing a finite element calculating model according to areal geology conditions and foundation processing requirements; thirdly, compiling a soil mass parameter inversion program through the combination with the Nelder-Mead algorithm of an exact penalty function; fourthly, conducting inversion analysis on sedimentation data through the inversion program to obtain post-surcharge-load soil mass parameters; fifthly, predicting the surcharge load foundation deformation amount of the next grade through the soil mass parameters obtained through inversion, and conducting surcharge load design of a raw material yard of the next grade on this basis. By means of the method, soil mass design parameters are unceasingly corrected through the real-time monitoring data in the surcharge load process, dynamic prediction of raw material storage yard foundation deformation under all grades of preloading is achieved, foundation is provided for foundation processing design and construction, the project investment cost is greatly saved, and high application and popularization value is achieved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering foundation treatment design, in particular to a dynamic prediction method for foundation deformation of a raw material storage site under graded surcharge preloading. Background technique [0002] Foundation settlement and deformation have always been concerned by the engineering community, but at present, engineers' prediction of foundation settlement is mostly based on practical experience, and lacks systematicness and inheritance. Through theoretical or numerical simulation (whether it is finite element, finite difference or discrete element), only the distribution range and distribution law of settlement can be reflected. It is difficult to predict the quantity, and the parameter adjustment has a large dispersion, which is finally attributed to empirical judgment. Due to the complexity of geotechnical engineering (uneven soil distribution, complex environmental conditions, dif...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 田田欧阳小良余火忠黄静
Owner WUHAN SURVEYING GEOTECHN RES INST OF MCC
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