低含水率无序黄土填方地基注水增湿试验研究  

Experimental Study on Water Injection Based Humidification of Disorderly Filled Loess Foundation with Low Water Content

作　　者：司俊泽 孙茉 许健[1] 张鉴 杨少飞 于永堂[1,4] SI Junze;SUN Mo;XU Jian;ZHANG Jian;YANG Shaofei;YU Yongtang(School of Civil Engineering,Xi'an University of Architecture and Technology,Xi’an 710055,Shaanxi,China;Power China Northwest Engineering Corporation Limited,Xi’an 710065,Shaanxi,China;China Construction Third Engineering Group Co.,Ltd.,Wuhan 430075,Hubei,China;China United Northwest Institute for Engineering Design&Research Co.,Ltd.,Xi’an 710077,Shaanxi,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [3]中建三局集团有限公司,湖北武汉430075 [4]中联西北工程设计研究院有限公司,陕西西安710077

出　　处：《西北地质》2025年第2期136-145,I0002,共11页Northwestern Geology

基　　金：陕西高校青年创新团队“西北特殊土工程与防灾创新团队”(2023-2026)资助。

摘　　要：为探究低含水率无序黄土填方地基的有效增湿方法,在兰州新区某建设工程填方区分别开展了三种不同注水方案的现场注水增湿对比试验研究,分析了三种不同试验方法的增湿效果。试验结果表明:三种注水方式增湿最大影响深度均未达到拟增湿深度,其主要原因是无序填方内部结构松散、孔隙发育,注水后水分沿优势渗流通道迁移;采用三种孔深条件(孔深6 m、13 m及21 m)进行地基注水增湿后,土层含水率的分布最为均匀,增湿效果最优;采用该方法所需的单位面积注水量最少,仅为1.61 m^(3)/m^(2),较其他两种注水方式分别减少了62%和34%。To explore effective humidifying methods for disorderly filled loess foundation with low water content,comparative field experiments using three different water injection schemes were conducted on water injection based humidification in the fill area of a construction project in Lanzhou New Area,and the humidification effects of the three different experimental methods were analyzed.The experimental results show that all the maximum humidification depths of the three water injection methods did not reach the designed wetting depths.This is primarily attributed to the loose internal structure and significant pore networks within the disorderly filled foundation,which caused preferential water migration along dominant seepage channels.Utilizing three different hole depth (i.e. 6 m, 13 m, and 21 m) for water injection based humidification, water content distribu-tion is most uniform, and thus the humidification effect is best. Moreover, the required water injection amount per unit area based on three different hole depth is least, only 1.61 m^(3)/m^(2), which is 62% and 34% less compared with the other two test schemes, respectively.

关 键 词：低含水率 黄土填方地基 注水增湿 现场试验 

分 类 号：P642[天文地球—工程地质学] TU472[天文地球—地质矿产勘探]