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Numerical Study of Subgrade Humidity Field Evolution Under Different Initial Groundwater Depths.(Report)

Byline: Zhi-Jun Liu (1) Keywords: Initial groundwater depth; Subgrade; Humidity field; Evolution rule; Numerical test Abstract: As one of the issues, the evolutions of humidity field must be studied to avoid roadbed water damage. To study the influences of groundwater depth differences on the subgra... Full description

Journal Title: Geotechnical and Geological Engineering 2015, Vol.33(1), p.79(8)
Main Author: Liu, Zhi-Jun
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Cengage Learning, Inc.
ID: ISSN: 0960-3182
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recordid: gale_ofa398536329
title: Numerical Study of Subgrade Humidity Field Evolution Under Different Initial Groundwater Depths.(Report)
format: Article
creator:
  • Liu, Zhi-Jun
subjects:
  • Rock Mechanics – Analysis
  • Groundwater – Analysis
  • Rain – Analysis
  • Humidity – Analysis
ispartof: Geotechnical and Geological Engineering, 2015, Vol.33(1), p.79(8)
description: Byline: Zhi-Jun Liu (1) Keywords: Initial groundwater depth; Subgrade; Humidity field; Evolution rule; Numerical test Abstract: As one of the issues, the evolutions of humidity field must be studied to avoid roadbed water damage. To study the influences of groundwater depth differences on the subgrade humidity field infiltrated by rainfall, five scale-down laboratory subgrade physical models with different initial groundwater depths were tested. The effects and mechanisms of different initial groundwater depths on the humidity values of disturbed zone, extended distances, and humidity gradients were explored. The results show that the influences of initial depths on humidity fields get more significant along with subgrade depths. With decrease of initial depths, the amplifications of subgrade humidity maximum differences increase quadratically to a steady value while the extended distances of humidity disturbed zone decrease quadratically to a steady value. A balanced groundwater depth should exist according to a given field situation. The influences of groundwater on humidity fields are vary slight while initial depths are deeper than the balanced one, otherwise, with increase of initial depths the amplifications of subgrade humidity increase logarithmically and the humidity gradients increase linearly. Author Affiliation: (1) State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics & Civil Engineering, China University of Mining & Technology, Xuzhou, 221116, Jiangsu, China Article History: Registration Date: 08/10/2014 Received Date: 05/05/2014 Accepted Date: 08/10/2014 Online Date: 29/10/2014
language: eng
source: Cengage Learning, Inc.
identifier: ISSN: 0960-3182
fulltext: fulltext
issn:
  • 0960-3182
  • 09603182
url: Link


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subjectRock Mechanics – Analysis ; Groundwater – Analysis ; Rain – Analysis ; Humidity – Analysis
descriptionByline: Zhi-Jun Liu (1) Keywords: Initial groundwater depth; Subgrade; Humidity field; Evolution rule; Numerical test Abstract: As one of the issues, the evolutions of humidity field must be studied to avoid roadbed water damage. To study the influences of groundwater depth differences on the subgrade humidity field infiltrated by rainfall, five scale-down laboratory subgrade physical models with different initial groundwater depths were tested. The effects and mechanisms of different initial groundwater depths on the humidity values of disturbed zone, extended distances, and humidity gradients were explored. The results show that the influences of initial depths on humidity fields get more significant along with subgrade depths. With decrease of initial depths, the amplifications of subgrade humidity maximum differences increase quadratically to a steady value while the extended distances of humidity disturbed zone decrease quadratically to a steady value. A balanced groundwater depth should exist according to a given field situation. The influences of groundwater on humidity fields are vary slight while initial depths are deeper than the balanced one, otherwise, with increase of initial depths the amplifications of subgrade humidity increase logarithmically and the humidity gradients increase linearly. Author Affiliation: (1) State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics & Civil Engineering, China University of Mining & Technology, Xuzhou, 221116, Jiangsu, China Article History: Registration Date: 08/10/2014 Received Date: 05/05/2014 Accepted Date: 08/10/2014 Online Date: 29/10/2014
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abstractByline: Zhi-Jun Liu (1) Keywords: Initial groundwater depth; Subgrade; Humidity field; Evolution rule; Numerical test Abstract: As one of the issues, the evolutions of humidity field must be studied to avoid roadbed water damage. To study the influences of groundwater depth differences on the subgrade humidity field infiltrated by rainfall, five scale-down laboratory subgrade physical models with different initial groundwater depths were tested. The effects and mechanisms of different initial groundwater depths on the humidity values of disturbed zone, extended distances, and humidity gradients were explored. The results show that the influences of initial depths on humidity fields get more significant along with subgrade depths. With decrease of initial depths, the amplifications of subgrade humidity maximum differences increase quadratically to a steady value while the extended distances of humidity disturbed zone decrease quadratically to a steady value. A balanced groundwater depth should exist according to a given field situation. The influences of groundwater on humidity fields are vary slight while initial depths are deeper than the balanced one, otherwise, with increase of initial depths the amplifications of subgrade humidity increase logarithmically and the humidity gradients increase linearly. Author Affiliation: (1) State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics & Civil Engineering, China University of Mining & Technology, Xuzhou, 221116, Jiangsu, China Article History: Registration Date: 08/10/2014 Received Date: 05/05/2014 Accepted Date: 08/10/2014 Online Date: 29/10/2014
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