土工基础

›› 2017, Vol. 31 ›› Issue (5): 599-601.

• 工程实录 • 上一篇    下一篇

基于Rankine理论支挡结构主动土压力的近似分布

宋 征   

  1. （三峡大学科技学院，湖北宜昌 443002）
  • 收稿日期:2016-10-18 修回日期:2016-10-28 出版日期:2017-10-20 发布日期:2017-10-29
  • 作者简介:宋 征（1984-），男，讲师，研究方向为岩土工程、地质灾害防治。

Approximation of Rankine Active Earth Pressure Distribution on Retaining Structures

SONG Zheng   

  1. (College of Science and Technology, Three Gorges University, Yichang 443002)
  • Received:2016-10-18 Revised:2016-10-28 Online:2017-10-20 Published:2017-10-29

摘要： Rankine理论土压力的计算简单方便，常应用于实际工程的设计，但当填土较深时由于计算主动土压力值偏大而使支挡结构的设计不经济。在Rankine假设的基础上采用水平条分法推导了主动土压力的分布。以内摩擦角φ=15°为例，分析了忽略支挡结构与土体间摩擦时主动土压力系数沿填土深度的变化，得出了土压力呈非线性分布的原因。通过算例总结了砂性填土和粘性填土主动土压力的分布特点，提出了主动土压力近似分布图式，为支挡结构的设计提供一定的参考。

关键词: Rankine理论, 水平条分法, 主动土压力, 近似分布

Abstract: Rankine earth pressure theory is widely used in the practical engineering design due to its simplicity. However, when it is used in predicting lateral earth pressure in deep fills, the estimated excessive earth pressures will result in a noncost effective retaining structure design. Based on the Rankine Theory, the horizontal slice method is proposed in this paper to estimate the lateral earth pressure distribution on the retaining structures. Using an internal friction angle of 15 degrees, when the friction between retaining structure and soils is neglected, the lateral earth pressure has a nonlinear distribution in the vertical direction. The approximate lateral earth pressure distributions for cohesionless and cohesive soils are provided in the paper and can be used for the practical engineering design.

Key words: Rankine Theory, Horizontal Slice Method, Active Earth Pressures, Approximate Distribution