|Table of Contents|

Centrifugal test study on freeze-thaw characteristics of high-steep fill slope with gravel soil(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年06期
Page:
188-198
Research Field:
岩土工程
Publishing date:

Info

Title:
Centrifugal test study on freeze-thaw characteristics of high-steep fill slope with gravel soil
Author(s):
WENG Xiaolin;  DANG Bohan;  YANG Lianxiang;  HU Jibo
(School of Highway, Chang'an University, Xi'an 710064, Shannxi, China)
Keywords:
freeze-thaw cycle;  high-steep fill slope;  soil-rock mixture filler;  centrifugal test
PACS:
TU443
DOI:
10.19815/j.jace.2024.01077
Abstract:
Taking the national ski jumping training base project in Laiyuan as the background, the effect of freeze-thaw cycle on high-steep fill slope with gravel soil was studied. Using centrifugal model tests, variation patterns of parameters such as temperature, pore water pressure, and vertical displacement at the slope crest under freeze-thaw cycle were analyzed. The response of high-steep fill slope with gravel soil to freeze-thaw cycle was examined, and the influence of gravel soil gradation on the physical properties of the slope was discussed to determine the optimal gradation of high-steep fill slope with gravel soil under freeze-thaw cycle. The results show that the temperature variation trends at different burial depths are generally consistent, but the rate of temperature change decreases with the increase burial depth. The freezing and thaw settlement rates on the slope surface are significantly higher than those at the slope toe and crest. During the freeze-thaw process, both the temperature and pore water pressure of the gravel soil exhibit a “rapid decline-slow decline-rapid rise-slow rise” pattern, with the greatest temperature variation occurring on the slope surface and the most complex pore water pressure variation at the slope toe. The vertical displacement at the slope crest shows a “rapid frost heave-slow frost heave-rapid thaw settlement-slow thaw settlement” trend, with the maximum vertical displacement occurring near the centerline of the slope crest. The coarse particle content in the gravel soil fill has a significant impact on the variation of pore water pressure during the freeze-thaw process. The higher the coarse particle content, the smaller the variation in pore water pressure. When the ratio of fine, medium and coarse particles is about 6:3:1, by appropriately reducing the proportion of fine particles and increasing the content of medium and coarse particles, the minimum temperature at the slope toe under freeze-thaw cycle can be increased, the initial pore water pressure at the slope toe can be reduced, and frost heave and thaw settlement at the slope crest as well as overall slope deformation can be minimized.

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Last Update: 2025-11-25