Study on the Influence of Water Content to Subsidence Characters of Loess, Gansu Province

• 责任者：Xu Shunhua (School of Civil Engineering and Mechanics ; Lanzhou University ; Lanzhou 730000 ; China) ; Wang Lanmin
• 刊名：Northwestern Seismological Journal
• 出版年：2010
• 卷期：32(1)
• 关键词：含水率 ; moisture content ; 黄土类土 ; loessial soil ; 甘肃 ; Gansu Province
• 页码：p.30-35
• 图表：6 illus., 2 tables, 15 refs.
• 分类号：1702
• issnNo：ISSN1000-0844
• isbnNo：CN62-1048/P

The subsidence characters of the typical Q₃ loess, located on third terrace of Tao River are systemically investigated. The samples taken at depth of 4 m, 8 m, 12 m, 16 m, 20 m in a 20 m depth pit are researched in laboratory. The results show some primary achievements: 1) the seismic subsidence capacity of natural loess gradually weakens with depth increasing; 2) there is a obvious law that the seismic subsidence capacity of loess increases with the growth of water content in same depth from experimenting 4 samples with 5%, 10%, 15% and 20% water content, which were acquired by humidification and dehumidification of the samples;  and 3) through analyzing the experiment data, the quantitative law of water content influence on the seismic subsidence capacity of loess is found, and based on the law, the critical water contents of loess seismic subsidence are given under different dynamic stress.