|Table of Contents|

Large shear test on coarse saline soil with freeze-thaw cycle(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2012年03期
Page:
11-16
Research Field:
道路工程
Publishing date:

Info

Title:
Large shear test on coarse saline soil with freeze-thaw cycle
Author(s):
ZHANG Sha-sha1; 2;  YANG Xiao-hua1; 2
1.School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Key Laboratory for Special Area Highway Engineering of the Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China
Keywords:
road engineering;  coarse grain saline soil;  freezing and thawing cycle;  large shear test;  shear strength
PACS:
U416.1; TU448
DOI:
-
Abstract:
The shear strength characteristics of crude coarse grain saline soil under freeze-thaw cycles is directly related to the stability embankment on saline soil. The conventional shear test device will cause the particle-size effect of coarse grain saline soil. In order to make the test results more accurate, based on the features of coarse grain saline soil in northwest China after freezing and thawing and the principles of shear test, a large freeze-thaw cycle shear test device was developed to effectively test the strength properties of materials under different temperatures. Relying on the saline soil experimental section projects of a highway, the soil embankment was simulated with natural sulfate-chloride sand saline, the characteristics of strength change of natural sulfate-chloride sand saline soil was tested after freeze-thaw cycle test, the test datum were analyzed with numerical simulation under the actual working conditions. The results show that with the increase of freeze-thaw cycle times, the cohesion of the soil near the cold side gradually increases, the internal friction angle firstly decreases and then increases. The strength of the soil near the warm side gradually decreases, the internal friction angle has some increases after the 9 times freeze-thaw cycle test. The intensity of embankment with the natural sand saline soil filling is stable. 4 tabs, 5 figs, 11 refs.

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Last Update: 2012-08-20