Study of immersion collapsible characteristics under overburden pressure of Western Henan loess along Zhengzhou-Xi'an high-speed railway

被引：0

作者：

Wu Xiao-peng ^{[1
,2
]}

Xiong Zhi-wen ^{[2
]}

Wang Xiao-jun ^{[3
]}

Qu Yao-hui ^{[2
]}

机构：

[1] Lanzhou Univ, Sch Civil Engn & Mech, Lanzhou 730000, Gansu, Peoples R China

[2] Northwest Res Inst Co Ltd, China Railway Engn Corp, Lanzhou 730000, Gansu, Peoples R China

[3] Zhejiang Univ, Ningbo Inst Technol, Ningbo 315100, Zhejiang, Peoples R China

来源：

ROCK AND SOIL MECHANICS | 2012年 / 33卷 / 06期

关键词：

Zhengzhou-Xi'an high-speed railway; loess collapsibility under overburden pressure; field immersion test; collapsible characteristics;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

This paper makes a study of the collapsible characteristics under overburden pressure of the Western Henan loess along Zhengzhou-Xi'an high-speed railway by field experiment. The developing process in the depth of loess collapsibility under overburden pressure and the collapsible horizontal distance have also been analyzed. The results show that: the influence of soaking boundary on collapse is very clear; but collapsible rate shows a slow-fast-slow-until-stable tendency, with 60% of the total settlement immersed for 10 days and 90% for 30 days. The beta(0) of the site is 1.30, greater than the recommended 0.9 by the code. The results show that the extent of collapsibility of this region is more intense than that of general knowledge. In the site, loess collapse under overburden pressure maximum depth laboratory test value is 19 m; and field test value is 16 m, the former is 1.2 times the latter. The collapsible horizontal distance out of the test pit is 20 m, similar with the diameter of the test pit. Therefore, no water should be kept within 20 m from the embankment toe. The research results have been applied to the Zhengzhou-Xi'an high-speed railway construction, and can be taken as reference for similar projects in this region.

引用

页码：1769 / 1773

页数：5