东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (11): 1625-1630.DOI: 10.12068/j.issn.1005-3026.2016.11.022

• 资源与土木工程 • 上一篇    下一篇

基于人工降雨的天津盘龙谷泥石流起动特征

孙东彦1， 陈剑平1， 马玉飞2， 孙铁3   

  1. (1. 吉林大学 建设工程学院， 吉林 长春130026; 2. 济南市勘察测绘研究院， 山东 济南250000; 3. 建设综合勘察设计研究院有限公司 天津分院， 天津300012)
  • 收稿日期:2015-06-16 修回日期:2015-06-16 出版日期:2016-11-15 发布日期:2016-11-18
  • 通讯作者: 孙东彦
  • 作者简介:孙东彦(1990-)，女，吉林长春人，吉林大学博士研究生； 陈剑平(1957-)，男，福建南平人，吉林大学教授，博士生导师.
  • 基金资助:
    天津市国土资源和房屋管理局项目(国土房任［2012］12号); 国家自然科学基金资助项目(41402243).

Initiation of Debris Flow in Tianjin Panlonggu Based on Artificial Rainfall

SUN Dong-yan1， CHEN Jian-ping1， MA Yu-fei2， SUN Tie3   

  1. 1.College of Construction Engineering， Jilin University， Changchun 130026， China; 2.Jinan Geotechnical Investigation and Surveying Institute， Ji’nan 250000， China; 3.Construction of Comprehensive Survey and Design Institute， Tianjin 300012， China.
  • Received:2015-06-16 Revised:2015-06-16 Online:2016-11-15 Published:2016-11-18
  • Contact: CHEN Jian-ping
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摘要： 通过泥石流物理模型试验研究了盘龙谷泥石流的起动特征，探讨了其起动方式、物源补给来源以及降雨条件的影响等.实验结果表明，泥石流起动时形成区堆积物源不会整体滑移，而是在其表面形成冲沟并逐渐扩大直至引发泥石流；前期先降小雨使土体达到完全饱和，然后再降中雨或大雨的情形其危险性最高；冲沟两侧的不稳定岩土体构成泥石流物源的主要补给来源.实验现象与盘龙谷泥石流具有较高的一致性，可以为建立泥石流预警系统及防灾减灾提供一定的参考依据.

关键词: 泥石流, 起动特征, 人工降雨, 冲沟, 不稳定岩土体

Abstract: A debris flow physical model was established to study the starting-up characteristics， and then the initiation mode， recharge sources of provenance， the influence of rainfall on debris flow were studied. The results shows that the major provenance in debris flow forming area wont slide integrally when the debris flow starts up， but rather forming some gullies on the surface of the forming area， and the gullies develop until the debris flow starts up. It′s more dangerous in the case that the soil is saturated by small rainfall beforehand and then scoured by the moderate or heavy rainfalls. Unstable rock and soil mass on both sides of the gullies become the main recharge sources of provenance. The experimental results are well consistent with the natural Panlonggu debris flow. The research results can provide certain reference for building the early warning system and disaster prevention and reduction for Panlonggu debris flow and other similar debris flows.

Key words: debris flow, characteristics of initiation, artificial rainfall, gully, unstable rock and soil mass

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