土工基础

土工基础 ›› 2023, Vol. 37 ›› Issue (4): 611-614.

• 专题论述 • 上一篇    下一篇

利用CFG桩减小软土桥台桩侧向挤压力和变形的研究

王 伟1，冯 党2，曹先振3，谢 昌4，李发扬2   

  1. （1.四川中赢工程技术有限公司，成都 610041；2.南水北调中线干线工程建设管理局渠首分局，河南南阳 473000；3.南水北调中线干线陶岔管理处，河南南阳 473000；4黄河建工集团有限公司,郑州 450000）
  • 收稿日期:2022-01-14 修回日期:2022-02-10 出版日期:2023-08-31 发布日期:2023-09-01
  • 作者简介:王伟(1988-)，男，工程师,研究方向为交通岩土工程设计及研究。

Minimizing Lateral Squeezing Force and Deformation at Bridge Abutment in Soft Soils Using CFG Columns

WANG Wei1, FENG Dang2, CAO Xianzhen3, XIE Chang4， LI Fayang2   

  1. (1.Sichuan Zhongying Engineering Technology Co. Ltd., Chengdu 610041； 2.Headworks Division of Construction Administration Bureau of the Middle Route of SouthtoNorth Water Transfer Project, Nanyang 473000； 3.Taocha Management Office of the Middle Route of SouthtoNorth Water Transfer Project, Nanyang 473000； 4.Yellow River Construction Engineering Group Co. Ltd., Zhengzhou 450000)
  • Received:2022-01-14 Revised:2022-02-10 Online:2023-08-31 Published:2023-09-01

摘要： 为了研究在CFG桩处治下路基填筑对软土侧向流动及对邻近桥台桩侧向挤压力等的影响，基于实际工点将CFG桩置换率作为计算变量，开展了数值模拟研究。计算结果表明：由于CFG桩对软土侧流的阻拦作用，桥台桩受的侧向挤压力和附加水平位移随CFG桩置换率的增大而逐渐减小，且桥台桩水平位移曲线则以位移中性点呈逆时针旋转。桥台台背侧倾是由台背土压力和桥台桩侧向挤压力的合力矩引起的，随着CFG置换率的提高，桥台倾斜逐渐缓解，但仍存残余侧倾。

关键词: CFG桩, 软土, 桥台桩, 挤压力, 遮拦作用

Abstract: To study the influence of CementFly AshGravel (CFG) columns in minimizing the lateral squeezing force, excessive horizontal displacement and abutment tilting of the adjacent abutment piles induced by the soft soil lateral flow sue to the embankment construction, a series of numerical studies were performed with the sitespecific conditions. The analysis results show that, due to the shielding effect of the CFG columns on the lateral flow of the soft soil, the lateral squeezing force and excessive horizontal displacement of the abutment pile gradually decrease with the increased number of the CFG column replacement rate, and the horizontal displacement curve of the abutment pile rotates counterclockwise with the displacement neutral point. The abutment tilting is caused by the resultant moment of abutment lateral earth pressure and abutment pile lateral squeezing pressure. With the increase of the CFG replacement rate, the abutment tilt is gradually relieved, but there is still residual rotation.

Key words: CFG Columns, Soft Soils, Abutment Piles, Lateral Squeezing Force, Shielding Effect

中图分类号: