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Subgrade settlement prediction method based on improved Verhulst curve

A prediction method and curve technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficulty in adoption, difficulty in determining constitutive relations and model parameters, and achieve the effect of avoiding interference

Inactive Publication Date: 2017-11-10
CCCC FIRST HIGHWAY CONSULTANTS +2
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Problems solved by technology

For the former method, due to the difficulty in determining the constitutive relation of soil and model parameters, it is difficult to adopt in engineering

Method used

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  • Subgrade settlement prediction method based on improved Verhulst curve
  • Subgrade settlement prediction method based on improved Verhulst curve
  • Subgrade settlement prediction method based on improved Verhulst curve

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Embodiment Construction

[0044] The present invention will be described in detail below in combination with specific embodiments.

[0045] According to the analysis of a large number of subgrade settlement observation data, the settlement curves of the foundation under the influence of different factors can basically be divided into two categories. figure 2 , this type of curve is relatively gentle at the beginning, and is greatly affected by the filling rate and load intensity, and the embankment settlement lasts for a long time; the second type is the settlement curve of the foundation treated by the underground drainage body, see figure 2 , this type of settlement curve begins to be very steep, the settlement rate is high, and the curve has become gentle in the middle of the filling.

[0046] From the characteristics of the Verhulst curve, it can be seen that its changing law coincides with the second type of settlement curve. For the first type of settlement curve, because the settlement change...

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Abstract

The invention relates to a subgrade settlement prediction method based on an improved Verhulst curve. The method comprises the following steps: firstly, adding one index to a time factor in a Verhulst curve model to improve a Verhulst curve model, adjusting a time factor index when the improved Verhulst curve model is dissolved, and performing settlement prediction through the improved Verhulst curve model. By adopting the method, a subgrade settlement prediction value is relatively and highly related to real settlement data, a relatively satisfactory final settlement regression result is acquired, and a prediction method which is wide in applicability and high in reliability is provided for subgrade settlement monitoring in geotechnical engineering.

Description

technical field [0001] The invention relates to a roadbed settlement prediction method in the field of geotechnical engineering, in particular to a roadbed settlement prediction method based on an improved Verhulst curve. Background technique [0002] The accuracy and scientificity of embankment settlement prediction are of great significance to ensure the stability of embankment construction period and post-construction settlement. It is an important method to ensure the quality of the project to strengthen the prediction of the post-construction settlement of the subgrade, especially the prediction of the post-construction settlement of the soft soil foundation embankment, and to reasonably arrange the construction period and organize the construction procedure according to the prediction results. [0003] There are two main methods for estimating subgrade settlement: one is to obtain the parameters of the foundation soil through tests on the soil samples of the foundation...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 尹利华李永良杨平张留俊李美霞刘耀富
Owner CCCC FIRST HIGHWAY CONSULTANTS
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