土工基础

›› 2012, Vol. 26 ›› Issue (3): 101-103.

• 工程实录 • 上一篇    下一篇

自由膨胀率试验存在的人为影响因素分析

杨红英1，杜敏铭2   

  1. （1.中铁二院成都地勘岩土公司，成都 610031；2.四川省蜀通岩土工程公司，成都 610031）
  • 收稿日期:2012-02-27 出版日期:2012-06-20 发布日期:2012-06-25
  • 作者简介:杨红英（1982-），女，汉族，四川仁寿人，硕士研究生，助理工程师，研究方向为土体力学性质。

The Analysis of Human Error in Free Swell Ratio Testing

YANG Hongying1, DU Minming2   

  1. (1. Chengdu Geological and Geotechnical Investigation Co., China Railway Eryuan Survey and Design Group Co., LTD, Chengdu  610031；2.Sichuan Sutong Geotechnical Engineering Co., Ltd., Chengdu  610031）
  • Received:2012-02-27 Online:2012-06-20 Published:2012-06-25

摘要： 自由膨胀率用于对膨胀土的初判，适用于粒径小于0.5 mm的粘性土，是反映粘性土膨胀性的指标之一，对判别膨胀土有较大参考价值。该试验所需仪器设备简单，操作方便且试验周期短，便于进行大量室内试验，是目前国内测定粘性土胀缩特性时采用较多的试验项目。按照试验步骤，综合参考文献资料及反复试验验证，全面分析了该试验各个环节可能出现的问题及对自由膨胀率的影响。

关键词: 自由膨胀率, 膨胀土, 试验, 影响

Abstract: Free swell ratio is a key index for identifying expansive soil, which applies to cohesive soils with particle size less than 0.5 mm.  Since the testing does not involve complex equipment or testing procedures, it has been used widely in China to measure the expansive characteristic.  Many researchers has raised concerns about the uncertainties in the testing method, which may affect soil classification.  This paper provides a stateofart discussion on potential errors that may be induced throughout the entire testing procedure, based on a comprehensive literature review and a series of laboratory tests.

Key words: Free swell ratio test, Expansive soil, test, Influence