土工基础

›› 2017, Vol. 31 ›› Issue (6): 670-673.

• 工程实录 • 上一篇    下一篇

武汉天河机场地区膨胀土问题初步研究

金新锋   

  1. (中机三勘岩土工程有限公司，武汉 430031）
  • 收稿日期:2016-12-29 修回日期:2017-01-11 出版日期:2017-12-20 发布日期:2017-12-27
  • 作者简介:金新锋（1981-），男，高级工程师，研究方向为岩土工程勘察与设计。

Preliminary Study on the Expansive SoilIssues in Wuhan Tianhe International Airport Area

JIN Xinfeng   

  1. (China Machinery TIDI Geotechnical Engineering Co.,Ltd., Wuhan 430031)
  • Received:2016-12-29 Revised:2017-01-11 Online:2017-12-20 Published:2017-12-27

摘要： 根据天河机场三期扩建工程详勘及膨胀土专项勘察，通过现场取样、室内试验及实地调查，对膨胀土问题进行专门分析，得出了天河机场区域膨胀土吸水膨胀量较小，失水收缩变形较为明显的结论，认为由老粘土形成的填土，各项膨胀性指标一般均比原状土大。在详勘的基础上进一步划分出膨胀土分布区域，取得了明显的经济效益。最后提出了膨胀土防治措施。

关键词: 膨胀土, 自由膨胀率, 阳离子交换容量, 亲水矿物含量, 防治措施

Abstract: Based on the final geotechnical investigation results, a special expansive soil investigation program was conducted for the Tianhe International Airport Third Phase Expansion Project. Through the field sampling, laboratory tests and field investigations, the expansive soils in Tianhe area are characterized to have a small expansion when absorbing moisture and high contraction after the moisture loss. In engineered fill areas with the onsite soils, the expansion indices are generally higher than the original undisturbed expansive soils. As a result of this special investigation program, the horizontal and vertical distribution limits of the expansive soil are presented and this would lead to a significant construction and operational cost saving. The preventive control measures of the expansive soil are also provided in the paper.

Key words: Expansive Soil, Free Swelling Ratio, Cation Exchange Capacity, Hydrophilic Mineral Contents, Preventive Control Measures