土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (3): 335-338.

• 专题论述 • 上一篇    下一篇

基于扁铲侧胀和静力触探参数的桩基数值模拟

冉孟辉   

  1. (中铁八局集团第二工程有限公司，成都 610000)
  • 收稿日期:2019-07-17 修回日期:2019-08-30 出版日期:2020-06-20 发布日期:2020-06-21
  • 作者简介:冉孟辉（19-），男，工程师，研究方向为岩土工程。

Pile Soil Interaction Parameters from Flat Dilatometer and Cone Penetration Tests#br#

RAN Menghui   

  1. (No.2 Engineering Co. Ltd., China Railway No.8 Engineering Group Co. Ltd., Chengdu 610000)
  • Received:2019-07-17 Revised:2019-08-30 Online:2020-06-20 Published:2020-06-21

摘要： 桩基础的承载力和变形性状与周围土体的岩土力学参数直接相关，扁铲侧胀试验和静力触探试验提供大量可靠的土体原位测试参数。分析桩径为0.4 m、桩长为12 m的长螺旋桩的工程性状，对桩基进行静力载荷试验，并与扁铲侧胀试验参数和静力触探试验参数进行三维有限元数值对比分析，结果表明两者具有一定的差异性，无论是极限桩基承载力还是沉降量，以扁铲侧胀试验所得参数进行的数值模拟与静力载荷试验结果较为接近，而以静力触探试验所得参数进行的数值模拟与静力载荷试验结果相比略大。

关键词: 扁铲侧胀试验, 静力触探试验, 三维数值分析, 原位测试

Abstract: The bearing capacity and deformation behavior of piles are directly related to the geotechnical parameters of surrounding soil. Extensive reliable insitu test parameters of soil are provided by the flat dilatation test (DMT) and cone penetration test (CPT) devices for the pilesoil interaction analysis. The diameter of 0.4 meters and 12 meters long castinplace concrete pile installed by the long flight auger method was statically load tested for the axial compressive capacity. The load test results were then compared with the threedimensional numerical analysis results using parameters developed from DMT and CPT. The results indicated that, in both axial resistance and the settlement predictions in the numerical analysis, the discrepancies are existed. The parameters using DMT results are closer to the actual test results. The CPT parameters, however, over predict.


Key words: Flat Dilatometer Test (DMT), Cone Penetration Test (CPT), Threedimensional Numerical Analysis, Insitu Tests

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