岩土力学2023，Vol.44Issue(11)：3117-3127,11.DOI:10.16285/j.rsm.2022.1840
欠压密饱和黄土基本物理力学性质研究
Study on basic physical and mechanical properties of uncompacted saturated loess
摘要
Abstract
Immersion of loess can form compacted saturated loess or uncompacted saturated loess,and their engineering properties are significantly different.Based on the tests and data statistics of 22 loess sites in the Xi'an area,this paper systematically studied the basic physical and mechanical properties of the uncompacted saturated loess for the first time,revealed the fundamental reasons for its water-saturated weak property and large deformation due to water loss,and summarized the physical and mechanical characteristics of the uncompacted saturated loess in Xi'an area.The above research results can provide a basis for scientific research and engineering practice to strictly distinguish two types of saturated loess and formulate technical measures by classification.It is concluded that:uncompacted saturated loess is a kind of soil in which collapsible loess is not fully compacted,and macropore structure still exists in the immersion process.It is exposed in Q3 loess or the upper part of Q2 loess.It has a large void ratio,high water content,medium and high sensitivity,medium and high compressibility,low bearing capacity and strength,and is generally in soft plastic or flow plastic state.It is distributed adjacent to the compacted saturated loess,collapsible loess,and paleosol,forming a combination of soft and hard strata.关键词
饱和黄土/欠压密特性/物性状态/力学特性Key words
saturated loess/uncompacted state/physical state/mechanical properties分类
土木建筑引用本文复制引用
康佐,亢佳伟,邓国华..欠压密饱和黄土基本物理力学性质研究[J].岩土力学,2023,44(11):3117-3127,11.基金项目
国家自然科学基金(No.52178355).This work was supported by the National Natural Science Foundation of China(52178355). （No.52178355）
