长江科学院院报 ›› 2012, Vol. 29 ›› Issue (11): 87-90.DOI: 10.3969/j.issn.1001-5485.2012.11.019

• 岩土工程 • 上一篇    下一篇

 土体自稳坡角和土钉墙稳定机理分析

杨育文, 肖建华   

  1. 武汉市测绘研究院，武汉   430022
  • 收稿日期:2011-10-11 修回日期:2011-12-01 出版日期:2012-11-01 发布日期:2012-11-15
  • 作者简介:杨育文(1963- )，男，湖北孝感人，博士，教授级高级工程师，从事深基坑、桩基工程理论研究以及人工智能、自动化监测技术研究与开发
  • 基金资助:

    武汉市创新人才开发基金项目资助桩排内支撑组合支护基于实例的研究资助

Soil Self-stabilizing Angle and Stability Mechanism of Soil Nail Walls

YANG Yu-wen, XIAO Jian-hua   

  1. Wuhan Geomatic Institute, Wuhan   430022, China
  • Received:2011-10-11 Revised:2011-12-01 Published:2012-11-01 Online:2012-11-15

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摘要： 利用经典的上界定理，推导出土体自稳临界坡角计算式，提出了以相对坡角作为指标评判边坡稳定性的方法。除了已知的与土钉墙整体稳定相关的潜在滑动面外（第二滑动面），首次证明了主动区中还可能存在以土体自稳临界坡角决定的滑动面（第一滑动面）。实际工程应用验证了所提出方法的合理性。研究成果揭示了土体滑动机理，提供了评判边坡和土钉墙稳定的一条新途径。

关键词: 边坡, 滑动面, 土钉墙 

Abstract: The formula of determining the critical angle of soil self-stabilizing is deduced based on upper bound theorem. A new method is presented to evaluate slope stability by using the ratio of soil self-stabilizing angle to slope angle. In addition to the known second slip surface, which is the potential slip surface involving the overall stability, a new slip surface, namely the first slip surface is testified to possibly exist in the active zones of soil nail walls for the first time. This slip surface is determined by soil self-stabilizing angle. A series of case studies have validated the method proposed in this study. This research reveals the mechanism of soil slide, and provides a new approach of determining the stability of slope and soil-nail wall.

Key words: slope, slip surface, soil nail wall

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