土工基础

›› 2016, Vol. 30 ›› Issue (6): 648-650.

• 工程实录 • 上一篇    下一篇

基于能量理论的双排桩桩间土压力计算方法

刘汉程，张晓玲，游锦坚   

  1. （广东工业大学 土木与交通工程学院，广州 510006）
  • 收稿日期:2015-12-21 修回日期:2016-01-20 出版日期:2016-12-20 发布日期:2016-12-22
  • 作者简介:刘汉程（1988-），男，硕士研究生在读，研究方向为深基坑支护。

Energy Approaches of Earth Pressures Acting on the Double-Row Pile Excavation System

LIU Hancheng, ZHANG Xiaoling， YOU Jinjian
   

  1. (School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006)
  • Received:2015-12-21 Revised:2016-01-20 Online:2016-12-20 Published:2016-12-22

摘要： 结合双排桩的特点和基本假设，推导了基于能量理论的双排桩桩间土压力计算公式，同时给出了计算参数的取值方法。结果表明：随着开挖深度的增大，能量土压力解和朗肯土压力解的差值越大，这是由于朗肯土压力理论不考虑空间效应和摩擦作用；计算系数大于0.75时公式的计算精度将得不到保证。

关键词: 能量理论, 双排桩, 桩间土压力

Abstract: The earth pressures acting on the doublerow pile excavation system are deduced by using the energy approach and the earth pressure analysis parameters are recommended based on the characteristics of the doublerow excavation system. The results indicate that, with the increase of the excavation depth, the differences of calculation earth pressures between the energy theory and the Rankine theory are also larger and larger. The source of the earth pressure differences is mainly from Rankine theory assumptions of ignoring the friction and the space effect. Whereas, the earth pressures obtained from the energy approach is more reasonable. When the calculation coefficient is greater than 0.75, the abnormal results are obvious since the space effect in the doublerow excavation supporting system is significantly reduced. The rare row pile serves more like a ground anchor. At this situation, the accuracy of calculated earth pressures is not satisfactory.

Key words: Energy Theory, DoubleRow Piles, Earth Pressures Between Piles