• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2013, Vol. 34 ›› Issue (11): 7-11.doi: 10.3969/j.issn.1000-7229.2013.11.002

• 重点理论研究 • 上一篇    下一篇

降雨诱发山区线路溜坡的型试验与机理研究

 

周凯敏1,周健2
  

  1. 1.福建省电力勘测设计院,福州市 350003;2.同济大学地下建筑与工程系,上海市 200092
  • 出版日期:2013-11-01
  • 作者简介:周凯敏 (1983),男,工学博士,工程师,主要从事输电线路设计、边坡治理等方面的研究工作,E-mail:zhoukm30@126.com; 周健(1957),男,工学博士,教授,主要从事土体细观力学和土动力等方面研究工作,E-mail:tjuzj@vip.163.com。
  • 基金资助:

    国家自然科学基金项目(41272296)。

Model Test and Mechanism Research on Rainfall-Induced Shallow Landslides of Mountain Overhead Transmission Line

ZHOU Kaimin1, ZHOU Jian2   

  1. 1. Fujian Electric Survey & Design Institute, Fuzhou 350003, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Online:2013-11-01

摘要:

长时间降雨常引起山区架空输电线路塔位边坡发生浅层溜坡,给线路的运行带来重大安全隐患。影响溜坡的因素众多且相互干扰。利用自制小比例尺模型槽进行人工降雨诱发溜坡的室内模型试验,分析在强降雨条件下土性对溜坡的影响。通过在试验过程中对溜坡的破坏形态和位移场进行分析,研究强降雨条件下土体发生溜坡下滑的内在机理。研究表明,浅层溜坡是一个雨水入渗、土体变形、基质吸力降低、孔压升高、土水相互作用的复杂过程。在强降雨条件下的溜坡呈流滑型破坏类型,即呈流态化的后部土体在土水重力和水体渗透力共同作用下,推动前部土体快速下滑。

关键词: 架空线路, 溜坡, 降雨, 室内试验, 水土作用

Abstract:

Shallow landslides happen frequently after continuous rainfall at mountain overhead transmission lines, which have many influencial factors and bring serious hidden danger to power transmission lines. Using the self-developed small-scale model flume, the experiments of shallow landslides triggered on sandy soil under simulated rainfall were carried out to investigate the displacement fields and failure modes of shallow landslides, as well as to study the inherent mechanism of shallow landslide under heavy rainfall conditions. The results show that the shallow landslides processes involve a complex course including rainfall infiltration, soil deformation, metrics suction lost, pore pressure rise and water-soil interaction. The shallow landsides under heavy rainfall are changed into fluidized flow, and the fluidized soil pushes the front soil to move rapidly.

Key words: overhead transmission line, shallow landslide, rainfall, indoor test, water-soil interaction