土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (5): 775-777.

• 测试技术 • 上一篇    下一篇

基于弯曲元波速测试系统的珊瑚砂纵波特性研究

唐小欣，孙刘留   

  1. （桂林理工大学 土木与建筑工程学院，广西桂林 541004）
  • 收稿日期:2021-03-08 修回日期:2021-03-16 出版日期:2022-10-30 发布日期:2022-10-27
  • 作者简介:唐小欣（1996-），男，硕士研究生，研究方向为岩土工程。

P Wave Characteristics of Coral Sand Using Bender Element Wave Velocity Measurement System

TANG Xiaoxin， SUN Liuliu   

  1. (College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004)
  • Received:2021-03-08 Revised:2021-03-16 Online:2022-10-30 Published:2022-10-27

摘要： 弯曲元是室内土工试验的一种重要设备，常用于测试土体剪切波速，虽然其具有测试纵波波速的能力，但相关应用较少，随着人们对非饱和土的认识加深，纵波的重要性与日俱增。探讨了弯曲元系统在珊瑚砂试样上的表现，研究珊瑚砂纵波波速与物理性质参数的关系。结果表明：砂样波速与围压呈良好正相关，随着压力增加波速增长趋势放缓；含水率对于波速影响较大，且呈二次函数关系；同时，饱和土体的波传播情况与非饱和土有极大差异，可以观察到双相饱和介质中波传播的典型特征。

关键词: 弯曲元, 珊瑚砂, 纵波

Abstract: The bender element is an important common equipment in the soil test laboratory, which is often used to test soil shear wave velocity. Although the bender element has the capability of measuring the longitudinal wave velocity (P wave), its application is still rarely reported. With a better understanding of the unsaturated soil, the importance of P wave property is increasing. In this paper, the behavior of the bender element system in measuring the coral sand samples is evaluated. The relationship between P wave velocity and physical parameters of coral sand is also studied. The results show that there is a good positive correlation between the magnitude of wave velocity and the confining pressure, and the growth trend of wave velocity value slows down with the increase of pressure. The water content has a great influence on the wave velocity, and it is a quadratic function. At the same time, the wave propagation in the saturated soil is very different from that in the unsaturated soil, and the typical characteristics of the wave propagation in two-phase saturated media can be observed.


Key words: Bender Element, Coral Sand, P-Wave

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