土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (1): 76-79.

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水泥土室内试验无侧限抗压强度差异分析

侯  蕊1，吴家琦1，樊铁兵2，李  幻1，李云飞1   

  1. (1.华北水利水电大学地球科学与工程学院,郑州 450045;2.河南中核五院研究设计有限公司,郑州 450052)
  • 收稿日期:2019-04-26 修回日期:2019-05-27 出版日期:2020-04-20 发布日期:2020-04-20
  • 通讯作者: 李 幻（1979-），男，博士，副教授，研究方向为非饱和土。
  • 作者简介:侯 蕊（1994-），女，硕士研究生，研究方向为非饱和土。

Unconfined Compressive Strength of Cement Improved Soil Samples Prepared under Various Conditions

HOU Rui1, WU Jiaqi1, FAN Tiebing2, LI Huan1, LI Yunfei1   

  1. (1.College of Geosciences and Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450045;2.The Fifth Research& Design Corporation of CNN, Zhengzhou 450052)
  • Received:2019-04-26 Revised:2019-05-27 Online:2020-04-20 Published:2020-04-20

摘要： 以渤海近海口淤泥质黏土为研究对象，按照一定配比制作水泥土试样，进行无侧限抗压试验。研究了4种水泥掺量、2种养护方式、干湿法下水泥土的无侧限抗压强度规律。结果表明，在使用干法制样时水泥土的无侧限抗压强度峰值不存在规律性，波动性大，不稳定，分析原因为干法制样工艺不成熟所致，不建议在类似情况时水泥土施工使用干法工艺；在水泥掺量25%时，湿法制样水泥土抗压强度高于干法制样下的强度，建议在施工时若水泥掺量在23%~25%，水泥土施工时采用湿法工艺。

关键词: 软土, 水泥土, 无侧限抗压强度, 干法施工工艺

Abstract: Cement improved soil with various cement contents samples are prepared and unconfined compression tested using mucky clay from the near shore area of Bohai. The unconfined compressive strength values are obtained from samples prepared with four (4) different cement contents, two (2) different curing methods and wet cement and dry cement preparation methods. The test results indicate that the strength values of samples prepared with dry cement method are very scattered and have no relation with the cement content. The scattered strength values can be attributed to the unmatured sample preparation method. It is not recommended to use dry cement method for cementsoil construction under the similar conditions. At the cement content of 25%, the unconfined compressive strength values of cement improved soil samples prepared with wet cement method are much higher than those of prepared with dry cement method. It is suggested that when the cement content is between 23% and 25%, the wet cement method should be used in cement improvement method.

Key words: Soft Soils, Cement Improved Soils, Unconfined Compressive Strength, Dry Process Construction Technology

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