孔隙比-含水率对黄土湿陷性影响分析  

Analysis of the Effect of Void Ratio and Water Content on Loess Collapsibility

作　　者：赵帅 朱锐萌 赵琦琦 ZHAO Shuai;ZHU Ruimeng;ZHAO Qiqi(College of Earth Science and Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450000,China)

机构地区：[1]华北水利水电大学地球科学与工程学院,河南郑州450000

出　　处：《云南水力发电》2023年第12期333-337,共5页Yunnan Water Power

基　　金：河南省自然科学基金项目(232300421208)。

摘　　要：针对湿陷性黄土地区因黄土的湿陷性所引起的工程灾害问题,结合河南省荥阳市豫龙镇金地公园的具体项目,从项目地取自不同埋藏深度的原状黄土土样,通过WG型单杠杆双联固结仪来测试不同深度土样的湿陷性,通过室内试验来测定土样的基本物理指标-孔隙比、含水率,来研究该地区黄土孔隙比、含水率,不同埋藏深度与湿陷性之间的关系,试验结果表明,随着埋藏深度越深,黄土的孔隙比减小,湿陷性减弱;随着深度不断增加,黄土的含水率逐渐增大,黄土的湿陷性逐渐减弱,黄土的湿陷性与深度、含水率呈负相关,由于黄土是在干旱及半干旱等特殊的气候条件下形成的,从宏观上也可以更好地解释孔隙比、含水率、埋藏深度、湿陷性之间的关系。In response to the engineering disasters caused by the collapsibility of loess in collapsible loess areas,this paper combines the specific project of Jindi Park in Yulong Town,Xingyang City,Henan Province,and takes undisturbed loess soil samples from different burial depths at the project site.The collapsibility of soil samples at different depths is tested using a WG type single lever dual connection consolidation instrument.By conducting indoor experiments to determine the basic physical indicators of soil samples-pore ratio,water content-to study the relationship between loess pore ratio,water content,different burial depths,and collapsibility in this area.The experimental results indicate that as the burial depth increases,the pore ratio of loess decreases and the collapsibility weakens.As the depth increases,the moisture content of loess gradually increases,and the collapsibility of loess gradually weakens.The collapsibility of loess is negatively correlated with depth and moisture content.Due to the fact that loess is formed under special climatic conditions such as drought and semiarid,the relationship between pore ratio,water content,burial depth,and collapsibility can also be better explained from a macro perspective.

关 键 词：原状黄土 孔隙比 含水率 埋藏深度 湿陷性 

分 类 号：TU475.3[建筑科学—结构工程]