Results 11 to 20 of about 9,019 (250)

Conceptualising quality early childhood education: Learning from young children in Brazil and South Africa through creative and play‐based methods

British Educational Research Journal, EarlyView., 2023
Abstract Early childhood has increasingly been acknowledged as a vital time for all children. Inclusive and quality education is part of the United Nations Sustainable Development Goals, with the further specification that all children have access to quality pre‐primary education.
Laura H. V. Wright, Irene Rizzini, Malibongwe Gwele, Lynn McNair, Cristina Laclette Porto, Marsha Orgill, E. Kay M. Tisdall, Malcolm Bush, Linda Biersteker   +8 more
wiley   +1 more source

Research on the Temperature Field and Frost Heaving Law of Massive Freezing Engineering in Coastal Strata

Advances in Materials Science and Engineering, 2021
In this study, based on the background of massive freezing engineering in coastal strata, the thermal physical parameters and some freezing laws of soil were obtained through soil thermal physical tests and frozen soil frost heaving tests.
Chaochao Zhang, Dongwei Li, Junhao Chen, Guanren Chen, Chang Yuan, Zecheng Wang, Guosheng Ding, Xin Chen, Minghai Xia, Shengfu Wang, Bo Zhang, Ru He, Xin Yi   +12 more
doaj   +1 more source

Sensitivity Analysis of Pipe–Soil Interaction Influencing Factors under Frost Heaving

Atmosphere, 2023
The mechanism of pipe–soil interaction under frost heaving is complicated due to many factors affecting the pipe–soil system. In order to analyze the sensitivity of various pipe–soil interaction influencing factors and highlight the relationship between ...
Long Huang, Yu Sheng, Liping Chen, Erxing Peng, Xubin Huang, Xiyan Zhang   +5 more
doaj   +1 more source

Frost Heave in Colloidal Soils [PDF]

SIAM Journal on Applied Mathematics, 2011
We develop a mathematical model of frost heave in colloidal soils. The theory accounts for heave and consolidation while not requiring a frozen fringe assumption. Two solidification regimes occur: a compaction regime in which the soil consolidates to accommodate the ice lenses, and a heave regime during which liquid is sucked into the consolidated soil
Peppin, Stephen, Majumdar, Apala, Style, Robert, Sander, Graham   +3 more
openaire   +5 more sources

An Example of Damage to Slope Stabilization Work Caused by The Frost Heaving of Mudstone and Its Countermeasure

Journal of MMIJ, 2021
In this study,field surveys were carried out at the damaged area of slope stabilization works,where the main cause was presumed to be the frost heaving of the rock mass.Field measurements of the freezing depth and the amount of frost heave were also ...
Dagvadorj OTGONJARGAL, Dai NAKAMURA, Takayuki KAWAGUCHI, Tatsuya WATANABE, Shunzo KAWAJIRI, Toshimi MUNEOKA   +5 more
doaj   +1 more source

To the question of improvement the normative methodology for calculating the frost resistance of a road structure [PDF]

E3S Web of Conferences, 2020
The paper discusses the negative impact of heaving soil during freezing of a road structure, including heaving formation. The provisions of normative methodology for testing the road structure for frost resistance are considered.
Kagan G L, Shorin V. A., Velsovskij A. Y.   +2 more
doaj   +1 more source

Frost heave testing [PDF]

Matériaux et Constructions, 1976
The paper gives details of frost heave tests carried out on burnt and on unburnt colliery shales, the samples being obtained from 19 collieries in various parts of the country.
R. J. Kettle, R. I. T. Williams
openaire   +1 more source

Testing of a road structure for frost resistance using the curve of frost heaving intensity [PDF]

E3S Web of Conferences, 2020
The article considers the main provisions of the regulatory methodology for estimation the frost resistance of a road structure. The technique for determining the degree of soil heaving is assessed taking into that the standard for its determination was ...
Kagan G L, Shorin V. A., Velsovskij A. Y.   +2 more
doaj   +1 more source

An Analytical Solution for the Frost Heaving Force considering the Freeze-Thaw Damage and Transversely Isotropic Characteristics of the Surrounding Rock in Cold-Region Tunnels

Advances in Civil Engineering, 2020
Frost damage is a frequent occurrence in cold regions and can threaten the normal use and structural stability of tunnel engineering projects. To accurately determine the frost heaving force and effectively evaluate the frost damage in cold-region ...
Jiabing Zhang, Xiaohu Zhang, Helin Fu, Yimin Wu, Zhen Huang, Deyue Chen   +5 more
doaj   +1 more source

Frost heave [PDF]

Journal of Glaciology, 2010
AbstractThe deformation of the ground surface that is produced by frost heave has motivated almost a century of concerted laboratory, field and theoretical studies. Well before the development of equipment capable of resolving the microscopic films that support liquid transport towards growing ice lenses, early investigators predicted their occurrence ...
openaire   +1 more source