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Method for Predicting Permanent Deformation of Construction Waste Subgrade Filling Based on Humidity and Stress

A technology for construction waste and permanent deformation, which is used in construction waste recycling, analysis of materials, strength characteristics, etc., can solve problems such as increasing model complexity, affecting prediction accuracy, and prone to errors, and achieves obvious economic and social benefits. Effects with clear physical meaning and few parameters

Active Publication Date: 2022-05-31
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they ignore the effect of humidity changes
Although equations (5) and (7) take into account the influence of humidity changes on permanent deformation, more particle performance parameters increase the complexity of the model, making the test volume large and prone to errors, which affect the prediction accuracy

Method used

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  • Method for Predicting Permanent Deformation of Construction Waste Subgrade Filling Based on Humidity and Stress
  • Method for Predicting Permanent Deformation of Construction Waste Subgrade Filling Based on Humidity and Stress
  • Method for Predicting Permanent Deformation of Construction Waste Subgrade Filling Based on Humidity and Stress

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0057] The highway subgrade test was filled with construction waste taken from the Beijing Capital Ring Expressway (Daxing-Tongzhou section).

[0059]

[0061]

[0064]

[0066] Step b: prepare a test piece of 15cm×30cm according to the particle size range of the construction waste filler. According to the compaction test

[0067] Step c: The variables in the estimated model are the number of loadings, the net volume stress, the octahedral shear stress and the initial matrix suction.

[0068]

[0070] According to the permanent deformation test data No. 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000,

[0072]

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Abstract

The invention discloses a method for estimating the permanent deformation of construction waste subgrade filler based on humidity and stress, specifically: using the filter paper method to measure the initial matrix suction of construction waste, establishing a soil-water characteristic curve; preparing construction waste material test pieces , carry out the dynamic triaxial test, and obtain the permanent deformation value of the specimens simulating different working conditions; establish the logarithmic prediction model of the permanent deformation of the roadbed; obtain the estimated model parameters according to the dynamic triaxial test data fitting, and then pass the established estimated Model predicts permanent deformation values ​​of construction waste subgrade fill. The invention has high prediction precision, better fitting effect, clear physical meaning of the model, simple structure and few parameters, and solves the problems existing in the prior art.

Description

Prediction method of permanent deformation of construction waste subgrade filler based on humidity and stress technical field The invention belongs to road engineering technical field, relate to a kind of construction waste roadbed filler based on humidity and stress Permanent deformation estimation method. Background technique [0002] With the acceleration of urbanization, the amount of construction waste has increased dramatically, and the vast majority of untreated buildings Waste is dumped directly into landfills, causing serious environmental problems and resource losses. Therefore, in recent years, the construction The recovery, disposal and reuse of waste has gradually become an urgent and universal problem worldwide. According to statistics, in China's construction waste is growing rapidly at a rate of 240 to 360 million tons per year, but the recycling rate is less than 10%. Countries (eg Denmark 94%, Japan 65%) are far behind. This means that there is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/13G01N3/32G06F119/14
CPCG06F30/13G06F30/20G01N3/32G06F2119/14G01N2203/0075G01N2203/0005G01N2203/0256Y02W30/58
Inventor 张军辉黄超张安顺
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY