土工基础

土工基础 ›› 2019, Vol. 33 ›› Issue (6): 709-712.

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一种含气软土固结渗透联合试验装置的研制及初步应用

针对海洋含气软土存在的不良特性，在现有装置的基础上开发出适合含气土固结渗透联合测定试验的装置，实现了固结试验中排出流体的的水气分离，并有效解决了密封性及活塞与试样容器的摩擦等问题。通过新装置完成了含气土的固结渗透试验，获取了含气量、固结压力、变形量、渗透系数等数据。试验结果呈现的含气软土固结及渗透特性与预期相符、规律性较好，初步检验了仪器性能的可靠性。   

  1. （1.武汉理工大学 土木工程与建筑学院，武汉 430070；2.中科院武汉岩土力学研究所，武汉 430071）
  • 收稿日期:2019-02-25 修回日期:2019-03-12 出版日期:2019-12-28 发布日期:2019-12-28
  • 作者简介:任文其（1995-），男，硕士研究生，研究方向为特殊土。
  • 基金资助:
    国家自然科学基金资助项目（NO.51579237、NO.51779017）

Development and Preliminary Application of an Improved Testing Device for Consolidation and Permeability of Gassy Soils

A gassy marine soils usually demonstrate poor engineering properties. The conventional consolidation test device was improved so that it can conduct the consolidation and permeability of gassy marine soils. The improved device can separate the pore water and gas during the testing. The air and water tightness inside the ring and the friction between the piston and the ring are also effectively improved. This paper also presents the results on the gassy soil testing using the improved device. The results are gas content in the soil, preconsolidation pressure, compressibility and coefficient of permeability. The tested parameters are consistent with the soft soil performance and the reliability of the improved device is also verified.   

  1. (1.School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070;
    2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071)
  • Received:2019-02-25 Revised:2019-03-12 Online:2019-12-28 Published:2019-12-28

摘要： 针对海洋含气软土存在的不良特性，在现有装置的基础上开发出适合含气土固结渗透联合测定试验的装置，实现了固结试验中排出流体的的水气分离，并有效解决了密封性及活塞与试样容器的摩擦等问题。通过新装置完成了含气土的固结渗透试验，获取了含气量、固结压力、变形量、渗透系数等数据。试验结果呈现的含气软土固结及渗透特性与预期相符、规律性较好，初步检验了仪器性能的可靠性。

关键词: 含气软土, 水气分离, 固结, 渗透

Abstract: A gassy marine soils usually demonstrate poor engineering properties. The conventional consolidation test device was improved so that it can conduct the consolidation and permeability of gassy marine soils. The improved device can separate the pore water and gas during the testing. The air and water tightness inside the ring and the friction between the piston and the ring are also effectively improved. This paper also presents the results on the gassy soil testing using the improved device. The results are gas content in the soil, preconsolidation pressure, compressibility and coefficient of permeability. The tested parameters are consistent with the soft soil performance and the reliability of the improved device is also verified.

Key words: Gassy Soft Soils, WaterGas Separation, Consolidation, Permeability

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