土工基础

›› 2018, Vol. 32 ›› Issue (5): 514-516.

• 工程实录 • 上一篇    下一篇

砂性土中含水率对土拱演变的影响试验研究

曾春梅，梁海安，陈 强，钟家华，游智超，胡清波   

  1. （东华理工大学建筑工程学院，南昌 330013）
  • 收稿日期:2017-09-25 修回日期:2017-10-19 出版日期:2018-10-30 发布日期:2018-11-02
  • 作者简介:曾春梅（1997-），本科生，研究方向为结构工程。 通讯作者：梁海安（1980-），硕士生导师，研究方向为岩土工程。
  • 基金资助:

    东华理工大学大学生创新创业教育资助项目；东华理工大学研究生创新基金资助项目（DHYC-201813）

Experimental Study of the Influence of Moisture Content on the Soil Arching in Sandy Soils

ZENG Chunmei, LIANG Haian, CHEN Qiang, ZHONG Jiahua, YOU Zhichao， HU Qingbo   

  1. (School of Architectural Engineering, East China University of Technology, Nanchang 330013)
  • Received:2017-09-25 Revised:2017-10-19 Online:2018-10-30 Published:2018-11-02

摘要： 土拱效应是岩土体变形后受力的自我优化调整的结果，在工程中广泛存在。目前，有关土拱效应的研究，少有人研究含水率对土拱演变的影响。通过多组室内模型试验，同时将土拱的演变分为初拱、临界拱、土拱破坏及最终破坏状态四个阶段，对不同含水率下土拱的演变阶段进行了研究。试验结果表明，砂性土中含水率的变化在土拱演变阶段起着重要的作用，其中，含水率较小时可不考虑土拱效应。结论对土拱效应的研究应用具有一定的借鉴作用。

关键词: 土拱效应, 砂性土, 演变阶段, 含水率

Abstract: The soil arching is the result of selfoptimization and adjustment of the forces after deformation of rock and soil mass. The soil arching concept is widely used in various projects. The current researches on the soil aching are focused on the mechanical properties geotechnical materials, such as, cohesion and internal friction angle by the moisture content on the evolution of the soil arching effect. The model studies that the evolution of the soil arching can be divided into four stages: Initial Arching, Critical Arching, Failing Arching and Failed Arching. The moisture contents at each stage of the arching are studied. The test results indicate that the moisture content plays an important role in the soil arching effect in the sandy soils. When the moisture content in sand in small, the arching effect can be ignored.

Key words: Soil Aching, Sandy Soils, Evolution Stages, Moisture Contents