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在地质学上根据黄土的成因分为黄土和黄土状土,根据堆积年代分为老黄土(Q_1Q_2)和新黄土(Q_3、Q_4)。工程界从黄土的建筑性能出发,又将黄土及黄土状土划分为湿陷性黄土和非湿陷性黄土。但近几年来,工程界又把处于地下水位以下的那部分新黄土称为饱和黄土。本文试图对饱和黄土的基本特征及性能作一论述。一、饱和黄土定义及形成机制饱和黄土系指原具有湿陷性的新黄土,由于地下水的运动使其湿陷性消失,并呈现饱和状态(饱和度达80%以上)的非湿陷性
Geologically, it is divided into loess and loess soil according to the origin of loess, and is divided into old loess (Q_1Q_2) and new loess (Q_3, Q_4) according to the accumulation age. From the loess’s architectural performance, the engineering community divided the loess and loess-like soil into collapsible loess and non-collapsed loess. However, in recent years, the engineering sector has again called the new loess under the water table a saturated loess. This article attempts to discuss the basic features and properties of saturated loess. 1. Definition and Formation Mechanism of Saturated Loess Saturated loess refers to the original collapsible new loess, and its collapsibility disappears due to the movement of groundwater, and shows a saturated state (above 80% saturation) in non-collapse.