土工基础

›› 2019, Vol. 33 ›› Issue (2): 206-209.

• 工程实录 • 上一篇    下一篇

轮胎条改良黄土剪切强度与体变特性试验研究

杜振江，刘武超，杨永奇，苏华阳   

  1. (西北民族大学土木工程学院，兰州 730100)
  • 收稿日期:2019-03-04 修回日期:2019-03-13 出版日期:2019-04-20 发布日期:2019-04-22
  • 作者简介:杜振江(1997-)，男，在读本科生，研究方向为岩土工程。
  • 基金资助:

    西北民族大学国家级大学生创新创业训练项目计划资助项目（201810742095）

Experimental Studies of Shear Strength and Volumetric Strain Characteristics of Shredded Tire Chips-Loess Soil Mixtures

DU Zhenjiang, LIU Wuchao, YANG Yongqi,  SU Huayang   

  1. (College of Civil Engineering, Northwest Minzu University, Lanzhou 730100)
  • Received:2019-03-04 Revised:2019-03-13 Online:2019-04-20 Published:2019-04-22

摘要： 为了探究轮胎条尺寸效应及掺量对西北地区黄土剪切力学特性、变形特征影响，寻找体应变与剪切强度关系。通过室内大型直剪试验，研究了轮胎块-黄土混合土剪切过程中的力学和变形特性，研究结果表明轮胎条加筋土抗剪强度特性除与轮胎条的掺量、外观比及尺寸大小有关外,还与黄土的的密度及正应力等因素有关。试验发现轮胎条、黄土两种介质的相互影响发挥了混合体的强度效应，轮胎条的掺入改良了黄土的性质，改善了接触面上的摩擦特性。从试验上证实废弃轮胎改良块黄土效果较为显著，为黄土改良及减少黄土引起的工程地质灾害开拓了一个新的方法。

关键词: 岩土工程, 轮胎条, 掺量, 体积应变

Abstract: The influence of the dimensions of shredded tire chips on the shear strength and volumetric strain characteristics of shredded tireloess soil mixtures were studied throughout the largescale directshear tests. The shear strength and volumetric strain parameters were affected by the mixture content and dimensions of the shredded tire, density of the tested samples and the magnitude of the applied normal stress. The experimental test results indicated that the frictional properties at the contact surface among the shredded tire chips were improved by the loess soils and the properties of the mixtures were enhanced. It is concluded that the engineering properties of loess soils can be improved by adding the shredded tire chips.

Key words: geotechnical engineering, shredded tire chips, mixture contents, volumetric strain