湿陷性黄土地基中主动减小负摩阻力新桩型的试验研究  

EXPERIMENTAL STUDY ON A NOVEL PILE WITH NEGATIVE FRICTIONAL RESISTANCE-REDUCED ACTIVELY IN COLLAPSIBLE LOESS FOUNDATION

作　　者：王兆辉 陈天镭 WANG Zhaohui;CHEN Tianlei(Lanzhou Nonferrous Metallurgy Design and Research Institute Co.,Ltd.,Lanzhou 730000,China)

机构地区：[1]兰州有色冶金设计研究院有限公司,兰州730000

出　　处：《工业建筑》2021年第5期151-157,144,共8页Industrial Construction

摘　　要：针对黄土地区因湿陷而产生的桩侧负摩阻力问题,设计了油毡包裹和套钢管隔离两种主动减小桩侧负摩阻力的方法,并对其进行室内模型验证试验,对比分析基桩在土体浸水前及土体浸水条件下的荷载传递规律及侧摩阻力发挥情况。试验结果表明:在浸水条件下,采用套管桩可有效隔离湿陷引起的桩侧负摩阻力;裹油毡形式桩可一定程度降低基桩负摩阻力。Be aimed at negative frictional resistance on the pile sides caused by collapsing in collapsible loess zones,two kinds of methods to reduce negative frictional resistauce were designed,which were to wrap piles with linoleum or with steel casing pipes.The model tests were conducted to contrast the laws of load transfer for the two novel piles in collapsible loess before and after immersion.The test results showed that in the condition of immersion,the piles wrapped with steel casing pipes could efficiently reduce negative friction resistance caused by collapsing;the piles wrapped with linoleum could reduce negative friction resistance of piles to a certain extent.

关 键 词：湿陷性黄土 负摩阻力 模型试验 

分 类 号：TU473.1[建筑科学—结构工程]