钻孔预浸水法处理深厚湿陷性黄土地基试验研究  

Experimental study on treatment of deep collapsible loess foundation by borehole pre immersion method

作　　者：张媛媛 孟繁荣 马琢琪 韩青 陈雅兵 ZHANG Yuanyuan;MENG Fanrong;MA Zhuoqi;HAN Qing;CHEN Yabing(Shanxi Jinye Rock and Dust Engineering Testing Co.,Ltd.,TaiYuan 030000,China;Shanxi Metallurgical Corporation Geotechnical Engineering Investidation,TaiYuan 030000,China;Jilin Investigation Design&Research Institute of Water Conservancy&Hydropower,Changchun 130021,China)

机构地区：[1]山西晋冶岩土工程测试有限公司,山西太原030000 [2]山西冶金岩土工程勘察有限公司,山西太原030000 [3]吉林省水利水电勘测设计研究院,吉林长春130021

出　　处：《粘接》2022年第4期70-74,共5页Adhesion

摘　　要：针对传统试坑浸水法存在入渗过程慢,在深部地层发挥作用时间长,以及用水量大的问题,提出采用钻孔预浸水法对深厚湿陷性黄土地基进行处理,并以浸水量和处理范围作为评价指标进行评价。结果认为:在10 m的浸水池浸水入渗稳定时长为7 d,最大入渗半径和深度分别为3.5 m和15.5 m;不同黄土层深度皆可能产生较为明显的湿陷变形,湿陷量随土层深度的增加而减少;以8 m为分界线,8 m以上土层变形主要在浸水期,8 m以下土层变形主要在停水期。Aiming at the problems of slow infiltration process,long time required to play a role in the deep stratum and large water consumption in the traditional test pit immersion method,the drilling pre immersion method is proposed to treat the deep collapsible loess foundation,and the immersion volume and treatment scope are used as the evaluation index to evaluate the treatment effect.The results show that the immersion infiltration stability time of 10 m immersion tank is 7 days,and the maximum infiltration radius and depth are 3.5 m and 15.5 m respectively.Different loess depths may produce obvious collapsible deformation,and the amount of collapsible deformation decreases with the increase of soil depth.Taking 8 m as the dividing line,the deformation of soil layer above 8m is mainly in the immersion period,and the deformation of soil layer below 8 m is mainly in the water cut-off period.

关 键 词：深厚湿陷性黄土 钻孔预浸水法 湿陷变形特性 水分入渗规律 

分 类 号：TU444[建筑科学—岩土工程]