摘要
通过在兰州和平镇探井取不同深度Q3黄土的试样,在室内做了颗粒分析,测定了其常规物理力学指标,并测了不同深度土样的湿陷系数。研究表明:该地区黄土湿陷性以中等和弱湿陷为主,少量黄土湿陷性强烈,湿陷系数的峰值随深度增加而逐渐变小,湿陷的敏感性一般。该地区不同深度的砂质黄土在不同压力下会表现出不同的湿陷特性。随黄土层位加深,上部荷载对其湿陷性影响逐步减弱。在同一压力作用下,上中层黄土的湿陷系数较大,下层黄土的湿陷系数较小。
Taking samples of different depths of Q3 loess at the exploratory well of Heping Town in Lanzhou,the particle analysis was made in the laboratory. The conventional physical and mechanical indexes were measured,as well as the coefficient of collapsibility of soil samples with different depths. The collapsibility of loess in this area is mainly medium and weak collapsibility,and a small amount of loess is collapsible. The peak of collapsibility coefficient decreases gradually with the increase of depth, and the sensitivity of collapsibility is general. The sandy loess with different depths will show different collapsibility under different pressures. As the Loess horizon deepens,the influence of upper load on Collapsibility gradually decreases. Under the same pressure,the collapsibility coefficient of the upper and middle loess is larger,and the collapsibility coefficient of the lower loess is smaller.
作者
吴爽
赵权利
高玉广
梁潇丹
WU Shuang;ZHAO Quanli;GAO Yuguang;LIANG Xiaodan(School of Geological Engineering and Geomatics,Chang’an University,Xi’an 710054;Institute of geotechnical engineering,Gansu Academy of Building Research,Lanzhou 730000)
出处
《河北工程大学学报（自然科学版）》
CAS
2019年第1期89-92,112,共5页
Journal of Hebei University of Engineering:Natural Science Edition
基金
国家自然科学基金资助项目(41502286)
中央高校基本科研业务费资助项目(No.310826171008)
陕西省重点研发项目(2017ZZDCXL-SF-03-01-01)
关键词
砂质黄土
湿陷性
上部荷载
物理指标
sandy loess
collapsibility
upper load
physical index
