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巴基斯坦某黄土场地湿陷特性试验

刘春龙 张志强 刘奉银 刘乃飞 孙宏超 吕文军

刘春龙, 张志强, 刘奉银, 刘乃飞, 孙宏超, 吕文军. 巴基斯坦某黄土场地湿陷特性试验[J]. 煤田地质与勘探, 2019, 47(2): 177-182. doi: 10.3969/j.issn.1001-1986.2019.02.027
引用本文: 刘春龙, 张志强, 刘奉银, 刘乃飞, 孙宏超, 吕文军. 巴基斯坦某黄土场地湿陷特性试验[J]. 煤田地质与勘探, 2019, 47(2): 177-182. doi: 10.3969/j.issn.1001-1986.2019.02.027
LIU Chunlong, ZHANG Zhiqiang, LIU Fengyin, LIU Naifei, SUN Hongchao, LYU Wenjun. Research on collapsibility of a loess site in Pakistan[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(2): 177-182. doi: 10.3969/j.issn.1001-1986.2019.02.027
Citation: LIU Chunlong, ZHANG Zhiqiang, LIU Fengyin, LIU Naifei, SUN Hongchao, LYU Wenjun. Research on collapsibility of a loess site in Pakistan[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(2): 177-182. doi: 10.3969/j.issn.1001-1986.2019.02.027

巴基斯坦某黄土场地湿陷特性试验

doi: 10.3969/j.issn.1001-1986.2019.02.027
基金项目: 

国家自然科学基金面上项目(51679198)

详细信息
    第一作者:

    刘春龙,1989年生,男,黑龙江哈尔滨人,博士研究生,从事岩土力学试验研究方面的工作.E-mail:lchlong1989@126.com

    通信作者:

    刘奉银,1968年生,男,山东滕州人,博士,教授,从事黄土力学与非饱和土力学的研究.E-mail:fyliu@pub.xaonline.com

  • 中图分类号: TU44

Research on collapsibility of a loess site in Pakistan

Funds: 

The General Program of National Natural Science Foundation of China(51679198)

  • 摘要: 巴基斯坦某地区的黄土为第四纪全新统冲洪积层,对该地区的研究和现有地质资料都比较少,需要做专门的研究。为了确定该区域的黄土地层分布情况及湿陷特性,根据工程场地建筑分布,分别选取典型位置的钻孔,取土样进行土工室内试验研究。利用构度指标定量描述黄土的结构特征,确定黄土的自重湿陷系数和湿陷系数,计算场地自重湿陷量和总湿陷量,并与规范方法进行比较。试验结果表明,该区域场地黄土的干密度和湿陷系数(上覆压力200 kPa)随深度几乎不变,天然含水率随深度整体呈增加的趋势。黄土的构度随综合物理特征量的增加而呈指数形式减小,压缩屈服应力psc随含水量的增加而减小,并且与构度呈线性关系。判定该区域黄土的场地为自重湿陷性场地,修正系数建议取小于1,地基湿陷等级为Ⅲ级严重。

     

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出版历程
  • 收稿日期:  2018-04-18
  • 发布日期:  2019-04-25

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