Experimental study on mechanical properties of clay soil under compression by ultrasonic test
Experimental study on mechanical properties of clay soil under compression by ultrasonic test
复制标题
粘性土受压力学性能超声试验研究
DOI：
10.1080/19648189.2016.1217791
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发表时间：
2018-06
影响因子：
2.1
通讯作者：
Bo Zheng
中科院分区：
文献类型：
--
作者：
Yu Wang;Xiao Li;Bo Zheng
通过轴向和侧向超声试验，研究了单轴压缩条件下粘性土的超声特性和力学特性。制作了直径为50 mm、高为100 mm的圆柱形土样，进行了一系列单轴抗压强度试验。超声波的发射和接收由P波压电换能器（130和500 kHz的轴向和横向超声测试，分别），并通过超声波探测器记录在整个变形过程中的超声传播时间和振幅。试验结果表明，轴向超声检测的超声脉冲速度（UPV）和透射比（TR）随轴向应力的增大而增大。给出并讨论了UPV和TR与轴向应力之间的统计相关性。同时，孔隙度的变化与应力的增加有关，推导了孔隙度变化与UPV的关系，分析了应力相关压实效应。此外，还建立了侧向超声裂缝宽度与UPV之间的关系式，裂缝宽度随应力的增加而增加。UPV的变化可以反映裂纹的演化过程。基于裂缝宽度与UPV的关系，建立了连续损伤演化方程和本构模型，并与试验数据进行了比较。这些结果证实了粘性土的应力相关压实效应和损伤开裂特性与超声波参数密切相关。在这方面，超声波测试可以适当地利用土壤的力学研究。
This paper aims at investigating the ultrasonic and mechanical properties of clay soil under uniaxial compression by axial and lateral ultrasonic tests. Cylindrical soil specimens (50 mm diameter and 100 mm height) were produced to perform a series of uniaxial compressive strength test. The ultrasonic waves were transmitted and received by P-wave piezoelectric transducers (130 and 500 kHz for axial and lateral ultrasonic test, respectively), and the ultrasonic travel time and amplitude were recorded by an ultrasonic detector during the whole deformation process. From the test results, the ultrasonic pulse velocity (UPV) and transmission ratio (TR) increased with the increasing axial stress by axial ultrasonic test. The statistical correlations between UPV and TR and axial stress are presented and discussed. Also, the change in porosity was related to the increase in stress, relationship between porosity variation and UPV was deduced to analyse the stress-related compaction effect. In addition, an equation was proposed to link the relationship between UPV and width of cracks by lateral ultrasonic test, the width of cracks increased steadily with the increase in stress. Crack evolution can be reflected by UPV variation. Moreover, based on the relationship of width of cracks and UPV, continuous damage evolution equation and constitutive model were established, and compared with the testing data. These results confirm that stress-related compaction effect and damage cracking characteristics of clay soil are closely related to the ultrasonic parameters. In this regard, the ultrasonic tests can be suitably exploited for the mechanical study of soil.
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DOI：
10.1007/s10064-013-0469-4
发表时间：
2013-02
影响因子：
4.2
作者：
Huie Chen;J. Zhang;Huan Yan
通讯作者：
Huie Chen;J. Zhang;Huan Yan
DOI：
10.1007/978-94-017-9460-2_4
发表时间：
2015
期刊：
--
影响因子：
--
作者：
N. Yoshida
通讯作者：
N. Yoshida
影响因子：
2.9
作者：
A. Jongmans;L. Denaix;F. Oort
通讯作者：
A. Jongmans;L. Denaix;F. Oort
DOI：
--
发表时间：
1938-03
期刊：
--
影响因子：
--
作者：
K. Iida
通讯作者：
K. Iida
DOI：
--
发表时间：
2001
期刊：
Journal of Glaciolgy and Geocryology
影响因子：
--
作者：
Shenghao Yu
通讯作者：
Shenghao Yu