土工基础

›› 2019, Vol. 33 ›› Issue (2): 228-231.

• 工程实录 • 上一篇    下一篇

旁压试验在车站基坑工程勘察中应用

王 沛1，魏 丽1，王晓燕2，李 芳3   

  1. (1.天津城建大学，天津 300384;2.中水北方勘测设计研究有限责任公司，天津 300322；3.立方通达实业（天津）有限公司，天津 301700)
  • 收稿日期:2019-02-26 修回日期:2019-02-28 出版日期:2019-04-20 发布日期:2019-04-22
  • 作者简介:王 沛（1973-），男，副研究员，研究方向为土工试验和原位测试。
  • 基金资助:

    天津市高等学校科技发展基金计划项目（20120911）；横向资助项目（hx2017-20） 

Application of Pressuremeter Tests in the Geotechnical Investigations of a Metro Station

WANG Pei1， WEI Li1， WANG Xiaoyan2， LI Fang3   

  1. （1.Tianjin Chengjian University, Tianjin 300384；
    2.China Water Resources Beifang Investigation, Design and Research Co. Ltd., Tianjin 300322；
    3.Lifetime Industrial (Tianjin) Co. Ltd., Tianjin 301700）
  • Received:2019-02-26 Revised:2019-02-28 Online:2019-04-20 Published:2019-04-22

摘要： 在天津主城区地铁站基坑开展旁压试验，测得土体的初始压力、临塑压力、极限压力和与应力相对应的变形值。利用相关公式计算出静止土压力系数（K0）和水平基床系数（Kh），比较分析测试值与建议值。实验证实，利用旁压试验测试土体的静止土压力系数和水平基床系数是可行的，但测得的K0和Kh与建议值有一定偏差。旁压试验结果可以为基坑工程设计提供参考。

关键词: 原位测试, 旁压试验, 静止土压力系数, 水平基床系数

Abstract:  In-situ pressuremeter tests were conducted the metro station site in Tianjin City. The initial pressure, creep pressure and limit pressure along with their deformation were obtained. These values were used to derive the atrest earth pressure (K0) and coefficient of lateral subgrade reaction (Kh). The test derived values were also compared with the suggested values based on soil classifications. It is concluded that the pressuremeter can be used to determine the lateral atrest earth pressure and the coefficient of lateral subgrade reaction, but the measured values are different from the conventional estimated values.

Key words: in-situ tests, pressuremeter tests, coefficient of at rest lateral earth pressure, coefficient of lateral subgrade reaction