土工基础

›› 2014, Vol. 28 ›› Issue (5): 96-98.

• 工程实录 • 上一篇    下一篇

旁压试验曲线分析及其深度变化特征

陈明星，沈少华   

  1. (中国电建集团北京勘测设计研究院有限公司，北京 100024)
  • 收稿日期:2014-02-25 出版日期:2014-10-20 发布日期:2014-10-28
  • 作者简介:陈明星（1984-），男，硕士，工程师，研究方向为工程勘测。

Analysis of Pressuremeter Curves and Their Characteristics with Depth

CHEN Mingxing， SHEN Shaohua   

  1. （China  Power Construction corporation Beijing engineering corporation limited， Beijing 100024）
  • Received:2014-02-25 Online:2014-10-20 Published:2014-10-28

摘要： 松塔水电站1#～6#钻孔旁压试验曲线表明，其压密阶段变化特征直接反映试验成败及试验结果的可靠性，其线性变形阶段与破坏阶段变化特征直接影响地层工程力学参数的取值。通过对7#～9#三个钻孔内的旁压试验结果分析得知，同一土层的旁压试验结果在深度方向上具有大体一致的变化特征，但不同深度其变化曲线不同，对试验结果进行汇总分析，可以对岩土层在深度上的力学特性进行估算，为确定不同深度地基承载力提供帮助。

关键词: 旁压试验, 成孔质量, 承载力

Abstract: The insitu Pressuremeter test results from boreholes No. 1 though No. 6 in Songta Hydropower Plant project indicate that the characteristics of the deformation curve in the compression phase is critical to a successful test and the reliability of the test. The linear deformation and the failure phases are closely related to the engineering properties of the soil strata tested. The Pressuremeter test results from borehole No. 7 through No. 9 indicate that the variations of the curves with the depth in the same soil stratum are similar with a different radius. Summarizing the test results can help the proper characterization of the soil properties at different depths. 

Key words: Pressuremeter Test, Borehole Quality, Bearing Capacity