长江科学院院报 ›› 2018, Vol. 35 ›› Issue (3): 70-74.DOI: 10.11988/ckyyb.20171072

• 岩土力学试验与理论 • 上一篇    下一篇

土工布应变的测量方法研究

陈凌伟1,2, 周小文2, 彭卫平1, 李波3, 童军3   

  1. 1.广州市城市规划勘测设计研究院,广州 510030;
    2.华南理工大学 土木与交通学院,广州 510640;
    3.长江科学院 水利部岩土力学与工程重点实验室,武汉 430010
  • 收稿日期:2017-09-18 出版日期:2018-03-01 发布日期:2018-03-16
  • 作者简介:陈凌伟 (1990-),男,江西宜春人,工程师,博士,主要从事土的特性试验研究方面的工作。E-mail:lingweichan@163.com
  • 基金资助:
    中国科协创新驱动助力工程项目;广州市博士后国际培养计划资助项目;广州市城市规划勘测设计研究院青年基金项目

A Method of Measuring the Strain of Geotextile

CHEN Ling-wei1,2, ZHOU Xiao-wen2, PENG Wei-ping1, LI Bo3, TONG Jun3   

  1. 1.Guangzhou Urban Planning & Design Survey Research Institute, Guangzhou 510030, China;
    2.School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640,China;
    3.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2017-09-18 Online:2018-03-01 Published:2018-03-16

摘要: 土工布被广泛应用于各种加筋土工程当中,然而由于土工布应变测量难度大、精度低,在工程中发挥了多大的作用,产生了多大的变形尚不明确。针对土工布这类低弹性模量的柔性材料,提出采用柔性胶粘贴电阻应变片,通过对粘合剂粘贴形状与厚度等的精细控制,使得应变片能够与土工布协同变形,实现了土工布应变的准确测量。同时研制了一套用于土工布应力应变标定的设备,可将应变片测值转换为被测土工布的实际受力大小,并将其应用于离心模型试验中。研究结果为下一步研究土工布的加筋机理及其对模袋砂围堰稳定性的影响提供了技术保障。

关键词: 土工布, 应变测量, 电阻应变片, 柔性胶, 离心模型试验

Abstract: Despite wide usage in reinforced soil projects, geotextile is featured with big challenge and low precision in strain measurement as it is a flexible material of low elastic modulus. The role of geotextile in engineering as well as the strain of geotextile are still uncertain. In this article, we proposed a method of accurately measuring the strain of geotextile by controlling the shape and thickness of a flexible binder to paste strain gauges, which, hence deforming in coordination with geotextile. Moreover, we also developed an equipment for calibrating the stress-strain of geotextile, by which the observed value of strain gauge can be transformed to the actual deformation of geotextile. The equipment’s applicability was verified by centrifugal model test. The research achievement offers technical support for further researches on geotextile’s reinforce mechanism and influence on mold bag sand cofferdam stability.

Key words: geotextile, strain measurement, strain gauge, flexible binder, centrifugal model test

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