土工基础

›› 2016, Vol. 30 ›› Issue (3): 352-354.

• 工程实录 • 上一篇    下一篇

新疆盐渍土的工程地质特性与湿陷性研究

董 斌1,李志博2，付会成3，马 超4,周 奇4   

  1. （1.国核电力规划设计研究院，北京 100095； 2.吉林省交通规划设计院，长春 130021；
    3.吉林省水利水电勘测设计研究院，长春 130000； 4.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，武汉 430071）
  • 收稿日期:2015-09-28 修回日期:2015-10-15 出版日期:2016-06-20 发布日期:2016-06-21
  • 作者简介:董 斌（1983-），男，硕士研究生，工程师，研究方向为工程地质、岩土工程的相关工程应用。

Study on the engineering geological and collapsible characteristics of saline soil in Xinjiang

DONG Bin1, LI Zhibo2, FU Huicheng3, MA Chao4, ZHOU Qi4   

  1. (1.State nuclear Electric Power Planning Design and Research Institute, Beijing 100095;
    2.Jilin Transportation planning and Design Institute, Changchun130021;
    3.Jilin Water Resource and Hydropower Investigation and Design Institute Co., Ltd., Changchun, 130000;
    4.State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2015-09-28 Revised:2015-10-15 Online:2016-06-20 Published:2016-06-21

摘要： 盐渍土的溶陷变形和盐冻胀破坏是盐渍土地区工程建设主要病害之一。针对新疆玛纳斯县地区的盐渍土，开展现场与室内试验，研究该地区盐渍土的工程地质特性与湿陷特性。结果表明，该区盐渍土易溶盐含量为0.421%～1.989%，属中盐渍土；主要为非自重湿陷性盐渍土，部分场地为自重湿陷性盐渍土场地，湿陷程度为轻微～强烈。非自重湿陷性盐渍土的地基湿陷等级为I级（轻微），自重湿陷性盐渍土的地基湿陷等级为IV级（很严重），盐渍土湿陷起始压力平均值为71.1 kPa。基于研究结果，对盐渍土的地基基础选型提出了对策与建议。

关键词: 盐渍土, 湿陷系数, 工程地质, 强度, 含盐量

Abstract: Wetting collapse induced subsidence and freezing induced heave are the common hazards of engineered facilities in saline soils. This paper presents the investigation results of saline soils in Xinjiang Uygur Mannas region. The both field and laboratory tests were performed in order to characterize the wetting collapse and other geotechnical properties. The results indicate that, the soluble salt contents in the saline soils varies from 0.421% to 1.989% and it belongs to medium saline soil. The wetting collapse mainly belongs to the nonselfweight collapse type. The degree of collapse can be categorized as minor to severe. The nonselfweight collapse is Class I (minor) and the selfweight collapse can be classified as Class IV (strong). The average initial pressure is 71.1 kPa. Engineering Mitigation suggestions are also provided in the paper based on investigation results.

Key words: Saline soil, wet sinking coefficient, engineering geology, strength and salt content