Results 81 to 90 of about 13,524 (233)

Subgrade uplift prediction along a high-speed railway using machine learning techniques in Sichuan, China

Frontiers in Earth Science
In the red-bed areas of southwestern China, subgrade uplift deformation poses a serious safety concern for high-speed trains. However, the subgrade uplift mechanisms are still not well-defined, and there is a lack of effective prediction methods for ...
Hongyi Yan, Xiaoyan Zhao, Liming Jian, Ruixin Long, Dian Xiao, Minghao Chen   +5 more
doaj   +1 more source

Application of resilient modulus test equipment and procedures for subgrade soils

, 1985
This report is the first part of a two-part series. It describes the techniques involved in, and the results from, resilient modulus testing of subgrade soils that are typically found in Oregon. Two methods of testing were investigated: the triaxial' and

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Research on Construction Countermeasures for Freeze–Thaw Deformation of Permafrost Subgrade in Forest Regions of Northeast China

Applied Sciences
The permafrost in forest regions of Northeast China is very sensitive to the disturbance of subgrade construction, which will aggravate the degradation of the permafrost upper limit, leading to freeze–thaw deformation of the permafrost subgrade. Based on
Zhibo Xu, Guihe Wang, Zhu Yang
doaj   +1 more source

Effective Shoulder Design and Maintenance: TR-531, 2007

, 2007
Granular shoulders are an important element of the transportation system and are constantly subjected to performance problems due to wind- and water-induced erosion, rutting, edge drop-off, and slope irregularities.

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Study on Capillarity Water Rise in Subgrade Soil

, 2011
Many highways in China cross irrigation area of farm land. The water in rivers and ponds by two sides of roads can flush back into subgrade, and results in more water in subgrade soil, subgrade deformation and lowered capacity.
Lei He, Yun Chao Deng, Pei Wen Hao
core   +1 more source

An Integrated Multisource and Multiscale Monitoring Technique for Assessing the Health Status of High-Speed Railway Subgrade

Remote Sensing
The precise identification of railway subgrade defects remains a significant challenge for the railway industry globally. Due to the limitations of individual monitoring techniques, comprehensive information on subgrade defects cannot be obtained.
Yuanxingzi He, Yongwei Li, Linrong Xu
doaj   +1 more source

Comparative evaluation of geotechnical properties of red tropical soils and anthills from parts of Edo State for road construction

Journal of Applied Sciences and Environmental Management, 2018
Geotechnical tests were carried out on a total of six samples of red tropical soils developed over sedimentary and Basement terrains, made up of three soils and three termite hills samples.
O Andre-Obayanju, O.J. Imarhiagbe, T.U.S. Onyeobi   +2 more
doaj   +1 more source

Analysis of Flexible Pavement Structural Behavior Considering Decreased Subgrade Resilient Modulus [PDF]

MATEC Web of Conferences
This research focuses on the subgrade resilient modulus and its significance in investigating flexible pavements. The study compares results obtained from two distinct flexible pavement structures, utilizing numerical analysis using FLAC3D softawere ...
Bouatia Mohammed
doaj   +1 more source

Statewide Statistical Subgrade Characterization

, 1995
This report presents a detailed statistical analysis and graphical presentation of more than 120,000 subgrade modulus values from Minnesota state roads and highways.
Barnes, Randal J., Jankovic, Igor, Colom, David   +2 more
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Review of Sensor-Based Subgrade Distress Identifications

The attributes of diversity and concealment pose formidable challenges in the accurate detection and efficacious management of distresses within subgrade structures.
Mingzhao Wei, Xiuguang Song, Cong Du, Zhiheng Cheng, Yuan Tian, Zhengjian Xie, Yuqing Peng   +6 more
core   +1 more source