|Table of Contents|

Subgrade loess collapsibility before and after low level tamping(PDF)

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

Issue:
2009年04期
Page:
25-29
Research Field:
Publishing date:
2009-08-20

Info

Title:
Subgrade loess collapsibility before and after low level tamping
Author(s):
YAN Bin1; XU Zhang-jian2
1.School of Geology Engineering and Geomatics,Chang’an University,Xi’an 710054,Shaanxi,China;2.Northwest Research Institute of Engineering Investigation and Design,Xi’an 710054,Shaanxi,China
Keywords:
road engineering;  loess subgrade;  low level tamping;  collapsibility;  granularity analyze;  cement type;  microstructure
PACS:
U416.169
DOI:
-
Abstract:
In order to research whether the low level tamping treatment is economical and effective to collapsible loess, the physical and mechanical parameters, granularity composition, cement type and microstructure were studied with scanning soil tests, particle size analyzer and scanning electron microscopy. It is found that physical and mechanical properties, clay content increase with the increasing of power level significantly, cemented and microcemented types transform into half cemented type, the microstructure by the flocculation shape, the support pocket as well as the mosaic transform into the mosaic and the superposition structure. The results show that the effective impact depth is from 2.0 m to 2.5 m, collapsibility is basically eliminated within 2m depth. 1 tab, 8 figs, 7 refs.

References:

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Last Update: 2009-08-20