土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (4): 537-541.

• 测试技术 • 上一篇    下一篇

基于原位测试方法的土体横波速度预测新方法

宋长航   

  1. (重庆中泰工程咨询有限公司，重庆 400020)
  • 收稿日期:2019-09-30 修回日期:2019-10-18 出版日期:2020-08-20 发布日期:2020-08-15
  • 作者简介:宋长航（1988-），男，工程师，研究方向为岩土，水利设计。

A New Method for Predicting Soil Shear Wave Velocity Based on In-situ Testing

SONG Changhang   

  1. (Chongqing Zhongtai Engineering Consulting Co. Ltd., Chongqing 400020)
  • Received:2019-09-30 Revised:2019-10-18 Online:2020-08-20 Published:2020-08-15

摘要： 直接测量地层的横波速度是获取参数的最可靠途径，但建立各种原位测试参数之间的相关关系，有利于认识土体的受力和变形规律，有利于综合反映土力学参数之间的内在联系，同时也能在无原位横波速度测试条件下，利用其它原位方法获取较为准确的推算值。通过选取和分析武汉地区6个不同场地的原位测试试验，确定了利用扁铲侧胀试验和静力触探试验粗略计算地层横波速度的相关关系，研究表明：根据侧胀土性指数ID、侧胀水平应力指数KD和压缩模量M确定地层横波速度，比利用静力触探试验锥尖阻力qc预测地层横波速度更为可靠，这或许与扁铲侧胀试验提供了反映土体应力历史的侧胀水平应力指数KD有关.

关键词: 扁铲侧胀试验, 静力触探试验, 超固结土, 原位测试, 横波速度

Abstract: The direct measurement of shear wave velocity of stratum is obviously preferable, but the establishment of correlation among various in-situ parameters is beneficial to understanding the law of soil stress and deformation, to comprehensively reflect the internal relationship among soil mechanical parameters and other in-situ methods can obtain more accurate estimates in the absence of in-situ shear wave velocity measurement. In this paper, by selecting and analyzing the in-situ test at six different sites in Wuhan. The paper examines the correlations to obtain rough estimates of the shear wave velocity Vs from conventional dilatometer tests (DMT) and cone penetration tests (CPT). The experimental results suggest that the DMT predictions of Vs  from the parameters ID (material index), KD (horizontal stress index), MDMT (constrained modulus) are more reliable and consistent than the CPT predictions from qc (cone resistance), presumably because of the availability, by DMT, of the stress history index KD .

Key words: Flat Dilatometer Tests, Cone Penetration Test, Over-consolidation Soil, In-situ Test, Shear Wave Velocity

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