摘要
湿陷变形是黄土地区重要的岩土工程问题,处于湿陷地基中的基础会因此受到下拉荷载作用,给上部建筑造成隐患。本文以实际工程为背景,对黄土地区岩土工程勘测的相关问题进行阐述,指出影响黄土湿陷的主要因素是含水量和干密度,并对目前工程中湿陷量计算存在的问题进行探讨。同时提出桩基负摩阻力存在一个最大值,约出现在中性点深度的一半位置处,并以此建立了一种负摩阻力简化计算方法,为工程设计提供参考。
The collapse deformation of loess is an important geotechnical problem in the loess area, and the foundation in collapsible ground would get the downdrag load owing to the collapsibility of loess. Based on the engineering practice, the problems about geotechnical engineering investigation in loess area are studied and the collapse displacement is also analyzed. It is indicated that the collapse of loess are mainly influenced by water content and dry density. It is inferred that there is the maximum negative friction at the half depth of the neural point, on which a simplified method to calculate the negative skin friction of pile is presented for engineering design.
出处
《工程勘察》
CSCD
北大核心
2009年第7期14-17,共4页
Geotechnical Investigation & Surveying
关键词
湿陷变形
下拉荷载
湿陷量
负摩阻力
collapse deformation
downdrag load
collapse displacement
negative skin friction
