土工基础

›› 2012, Vol. 26 ›› Issue (3): 50-53.

• 工程实录 • 上一篇    下一篇

石灰改良土填筑边坡合理坡率的研究

周大利，杨淑华，姚胜鹏   

  1. （西北水利水电工程有限责任公司北京分公司，北京 100102）
  • 收稿日期:2011-10-07 出版日期:2012-06-20 发布日期:2012-06-25
  • 作者简介:周大利（1979-），男，高级工程师。研究方向为岩土工程及建筑工程。

Study of the Appropriate Slope Angle for Lime Improved Soil Embankments

ZHOU Dali, YANG Shuhua, YAO Shengpeng   

  1. (Northwest Water Resources and Hydropower Engineering Co.,Ltd. Beijing Branch; Beijing   100102)
  • Received:2011-10-07 Online:2012-06-20 Published:2012-06-25

摘要： 石灰改良土填筑的路基，强度高、稳定性良好，与传统路基相比，坡率更大、路基土方工程量和造价更低，但石灰改良土填筑路堤结构边坡坡率的确定方法尚不明确。阐述了石灰改良土边坡强度的形成机理及微观特性，利用Geo-Slope软件建立理想边坡模型并对边坡稳定性随着边坡坡率以及边坡高度变化的规律进行了探讨，结合某省两个不同场区的边坡工程实例，总结了不同坡率和高度对工程稳定的影响并提出了合理的坡率。

关键词: 坡率, 石灰改良土, Geo-Slope

Abstract: The embankment constructed with lime improved soils has a higher strength and better stability. Compared with the embankments constructed with conventional soils, the lime improved embankments can be safely constructed with steep slope and result in a lower construction cost. However, the method to determine the appropriate slope angle for the lime improved embankment has not been reported. This paper first discussed the mechanism of the lime improved embankments and the micro-structures of the lime treated soils. The effect of different slope angles and embankment heights on the slope stability is studied with GeoSlope software. The paper also summarizes the case histories of two lime improved embankments and the appropriate slope angle for the lime improved embankment is recommended.

Key words: Slope angles, Lime improved soils, Geo-Slope