scholarly journals CHARACTERISTICS OF LONGITUDINAL PROFILE OF EXPRESSWAY AFFECTED BY FROST HEAVE

2005 ◽  
pp. 223-234
Author(s):  
Shuichi KAMEYAMA ◽  
Shinichiro KAWABATA ◽  
Kunio TOYODA ◽  
Akira KAWAMURA ◽  
Kenji HIMENO
Keyword(s):  
Longitudinal Profile ◽  
Frost Heave

The Weighted Longitudinal Profile. A New Method to Evaluate the Longitudinal Evenness of Roads

2008 ◽  
Vol 9 (2) ◽  
pp. 135-157 ◽  
Author(s):  
Andreas Ueckermann ◽  
Bernard Steinauer
Keyword(s):  
New Method ◽  
Longitudinal Profile

Revision of thickness design of cylindrical frozen walls considering frost heave

2013 ◽  
Vol 5 (5) ◽  
pp. 591 ◽  
Author(s):  
Zhou XiaoMin ◽  
Wang AnBao ◽  
Guan HuaDong
Keyword(s):  
Frost Heave

scholarly journals Some Observations on Glacier Flow

1951 ◽  
Vol 1 (9) ◽  
pp. 496-500 ◽  
Author(s):  
R. Haefeli
Keyword(s):  
Longitudinal Profile ◽  
Circular Section ◽  
Glacier Flow

AbstractThe excavation of a tunnel by I’Energie Ouest Suisse (EOS) presented inter alia the opportunity to construct a longitudinal profile of the glacier speed and also to observe the speed of the transverse contraction of a circular section. The swift change of shape without fracture was noteworthy. A second tunnel driven from the glacier snout straight up the subglacial stream gave the opportunity to establish a definite connection between the form of the glacier sole and its surface. Finally, measurements of the glacier speeds on the surface and their variations from year to year gave a closer indication of the nature of Forbes’s bands.

scholarly journals Deformation Law and Control Limit of CRTSIII Slab Track under Subgrade Frost Heave

2021 ◽  
Vol 11 (8) ◽  
pp. 3520
Author(s):  
Xiaopei Cai ◽  
Qian Zhang ◽  
Yanrong Zhang ◽  
Qihao Wang ◽  
Bicheng Luo ◽  
...  
Keyword(s):  
High Speed ◽  
Base Plate ◽  
Element Model ◽  
Middle Part ◽  
Railway Track ◽  
Frost Heave ◽  
Track Structure ◽  
Slab Track ◽  
Plastic Damage ◽  
Track Irregularity

In order to find out the influence of subgrade frost heave on the deformation of track structure and track irregularity of high-speed railways, a nonlinear damage finite element model for China Railway Track System III (CRTSIII) slab track subgrade was established based on the constitutive theory of concrete plastic damage. The analysis of track structure deformation under different subgrade frost heave conditions was focused on, and amplitude the limit of subgrade frost heave was put forward according to the characteristics of interlayer seams. This work is expected to provide guidance for design and construction. Subgrade frost heave was found to cause cosine-type irregularities of rails and the interlayer seams in the track structure, and the displacement in lower foundation mapping to rail surfaces increased. When frost heave occured in the middle part of the track slab, it caused the greatest amount of track irregularity, resulting in a longer and higher seam. Along with the increase in frost heave amplitude, the length of the seam increased linearly whilst its height increased nonlinearly. When the frost heave amplitude reached 35 mm, cracks appeared along the transverse direction of the upper concrete surface on the base plate due to plastic damage; consequently, the base plate started to bend, which reduced interlayer seams. Based on the critical value of track structures’ interlayer seams under different frost heave conditions, four control limits of subgrade frost heave at different levels of frost heave amplitude/wavelength were obtained.

A deep learning forecasting method for frost heave deformation of high-speed railway subgrade

2021 ◽  
pp. 103265
Author(s):  
Jing Chen ◽  
Anyuan Li ◽  
Chunyan Bao ◽  
Yanhua Dai ◽  
Minghao Liu ◽  
...  
Keyword(s):  
Deep Learning ◽  
High Speed ◽  
Frost Heave ◽  
High Speed Railway ◽  
Forecasting Method

Flake Dispersal Experiments: Noncultural Transformation of the Archaeological Record

1983 ◽  
Vol 48 (3) ◽  
pp. 553-572 ◽  
Author(s):  
Peter M. Bowers ◽  
Robson Bonnichsen ◽  
David M. Hoch
Keyword(s):  
Human Activity ◽  
Time Lapse ◽  
Primary Factor ◽  
Frost Heave ◽  
The Arctic ◽  
Archaeological Sites ◽  
Archaeological Record ◽  
Alaska Range ◽  
Natural Processes ◽  
Present Test

Time lapse studies of frost action effects on arctic and subarctic surficial archaeological sites have been conducted from 1973 to the present. Test plots of experimentally produced flakes were constructed in 1973 in the Tangle Lakes Region of the Central Alaska Range and subsequently remapped and photographed in 1974, 1976, and 1980. Similar test plots were laid out in the arctic foothills province of the Brooks Range. Observations made during the study period include: (1) flake displacements of as much as 20 cm/yr; (2) average minimum movement is 4 cm/yr; and (3) upslope movements were observed, suggesting that slope is not the primary factor in flake displacements. Frost heave, needle ice and, possibly, wind appear to be the dominant forces responsible for dispersals. It is argued that these and other natural processes can restructure the archaeological record into patterns that easily can be mistaken for those produced by human activity.

scholarly journals STUDY ON COUNTERMEASURE TO FROST HEAVE OF PRECAST L-TYPE RETAINING WALLS

2004 ◽  
pp. 215-224 ◽  
Author(s):  
Dahu RUI ◽  
Teruyuki SUZUKI ◽  
Satoshi YAMASHITA ◽  
Seigo SAWADA
Keyword(s):  
Retaining Walls ◽  
Frost Heave
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