土工基础

›› 2019, Vol. 33 ›› Issue (4): 471-474.

• 工程实录 • 上一篇    下一篇

考虑土体三维剪切破坏的压密注浆理论模型

李天坤1，刘 露2   

  1. （1.贵州高速公路集团有限公司，贵阳 550000；2.中南大学土木工程学院，长沙 410000）
  • 收稿日期:2019-05-07 修回日期:2019-05-15 出版日期:2019-08-20 发布日期:2019-08-16
  • 作者简介:李天坤(1978-)，男，工程师，研究方向为高速公路项目建设及运营养护管理。
  • 基金资助:

    国家重点研发计划（2017YFB1201204）

Theoretical Model of Compaction Grout Considering the Soil Three-Dimensional Shear Failure

LI Tiankun1, LIU Lu2   

  1. (1.Guizhou Expressway Group Co. Ltd., Guiyang 550000;
    2.School of Civil Engineering, Central South University, Changsha 410000)
  • Received:2019-05-07 Revised:2019-05-15 Online:2019-08-20 Published:2019-08-16

摘要： 考虑土体发生三维锥形剪切破坏的条件下，基于球孔扩张理论提出了一个新的压密注浆理论模型，分别推导出发生抬升作用时上抬力的计算公式和注浆压力的求解方法。与EIKelesh等人的计算结果进行相应比较，证明了所提出理论模型的正确性，同时分析了浆泡半径随注浆压力的变化规律，预测了不同土体在不同深度下的注浆压力值。

关键词: 压密注浆, 球孔扩张, 三维剪切破坏, 上抬力, 地基沉降

Abstract: This paper presents a new theoretical model for the compaction grout is proposed based on the theory of the spherical space expansions and considering the effect of the threedimensional cone shear failure of soil. The formulas foe estimating the uplift force and grouting pressure are also provided in the paper. The suggested method is also compared with the results from ElKelesh’s method. The relationship between the radius of the grouting bulb and the grouting pressure is also established to predict the required grouting pressure at different soil depths.

Key words: compaction grout, spherical space expansion, 3d shear failure, uplift force, foundation settlement