长江科学院院报 ›› 2021, Vol. 38 ›› Issue (5): 131-136.DOI: 10.11988/ckyyb.20200202

• 岩土工程 • 上一篇    下一篇

巴基斯坦塔尔沙漠风积砂土湿陷性特征

姚晨辉1,2, 夏玉云1,2, 吴学林1,2, 刘艺1,2, 陈铁飞1,2, 门青波1,2   

  1. 1.机械工业勘察设计研究院有限公司,西安 710043 ;
    2.陕西省特殊岩土性质与处理重点实验室,西安 710043
  • 收稿日期:2020-03-11 修回日期:2020-05-12 出版日期:2021-05-01 发布日期:2021-05-17
  • 作者简介:姚晨辉(1992-),男,陕西西安人,助理工程师,硕士,主要从事岩土体稳定性及其工程环境效应方面的研究。E-mail:790901149@qq.com
  • 基金资助:
    中国机械设备工程股份有限公司专项科技孵化项目( CMEC-KJFH-2018-02);机械工业勘察设计研究院有限公司科技研发基金项目(11-74-11004-2019-0002) ;陕西省特殊岩土性质与处理重点实验室资助项目

Collapsibility Characteristics of Wind-Blown Sand in Thar Desert, Pakistan

YAO Chen-hui1,2, XIA Yu-yun1,2, WU Xue-lin1,2, LIU Yi1,2, CHEN Tie-fei1,2, MEN Qing-bo1,2   

  1. 1. China Jikan Research Institute of Engineering Investigations and Design,Co.,Ltd.,Xi’an 710043,China;
    2. Shaanxi Key Laboratory for the Property and Treatment of Special Soil and Rock, Xi’an 710043, China
  • Received:2020-03-11 Revised:2020-05-12 Published:2021-05-01 Online:2021-05-17

摘要: 依托巴基斯坦塔尔矿区风积砂土湿陷性研究课题,基于前期勘察成果和相关湿陷性试验结果,对塔尔沙漠风积砂土的湿陷性特征及其基本物理指标与湿陷性的相关性进行分析研究。结果表明:风积砂土的湿陷性主要分布在①、②层,湿陷性系数平均值为0.039,湿陷性程度属于轻微-中等;风积砂土的颗粒组成和易溶盐特征是湿陷变形的主要内在基础;风积砂土湿陷性系数与含水率之间离散性较强,与孔隙比基本呈正相关关系,与干密度之间基本呈线性负相关,当孔隙比<0.65或干密度>1.60 g/cm3时,风积砂土不具有湿陷性。

关键词: 塔尔沙漠, 风积砂土, 湿陷性, 物理指标, 相关性

Abstract: The collapsibility characteristics of wind-blown sand in Thar Desert of Pakistan are investigated based on preliminary survey findings and collapsibility test results. The correlation between basic physical indexes of wind-blown sand and collapsibility are also examined. Results demonstrate that the collapsibility of wind-blown sand is mainly distributed in layer ① and layer ②, and the average collapsibility coefficient is 0.039, indicating slightly to moderately collapsible. The grain composition and soluble salt characteristics of wind-blown sand are the main internal basis of collapsible deformation. In addition, strong dispersion is found between collapsibility coefficient and water content of the wind-blown sand. Collapsibility coefficient is also positively correlated with porosity and linearly negatively with dry density. When porosity is smaller than 0.65 or dry density exceeds 1.60 g/cm3, wind-blown sand is not collapsible.

Key words: Thar desert, wind-blown sand, collapsibility, physical indexes, correlation

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