非饱和土地基中P1波通过波阻板的传播特性研究

doi:10.16285/j.rsm.2021.1029

岩土力学 ›› 2022, Vol. 43 ›› Issue (4): 1135-1146.doi: 10.16285/j.rsm.2021.1029

非饱和土地基中P1波通过波阻板的传播特性研究

舒进辉¹，马强^{1, 2}，周凤玺³，李强⁴

1. 青海大学土木工程学院，青海西宁 810016；2. 青海大学青海省建筑节能材料与工程安全重点实验室，青海西宁 810016； 3. 兰州理工大学土木工程学院，甘肃兰州 730050；4. 甘肃新发展城市开发建设运营集团有限公司，甘肃兰州 730010

收稿日期:2021-07-08 修回日期:2021-08-23 出版日期:2022-04-15 发布日期:2022-04-18
通讯作者: 马强，男，1990年生，博士，副教授，主要从事土动力学与岩土工程抗震方面的研究。E-mail: maqiang0104@163.com E-mail:shujinhui0318@163.com
作者简介:舒进辉，男，1994年生，硕士研究生，主要从事土动力学方面的研究工作。
基金资助:
国家自然科学基金（No. 52168053，No. 51978320）；青海省自然科学基金青年基金（No. 2021-ZJ-943Q）；甘肃省基础研究创新群体（No. 20JR5RA478）

Propagation characteristics of P1 wave passing through wave impeding block in unsaturated soil

SHU Jin-hui ¹, MA Qiang^{1, 2}, ZHOU Feng-xi³, LI Qiang⁴

1. School of Civil Engineering, Qinghai University, Xining, Qinghai 810016, China; 2. Qinghai Provincial Key Laboratory of Energy-saving Building Materials and Engineering Safety, Qinghai University, Xining, Qinghai 810016, China; 3. School of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 4. Gansu New Development City Development Construction Operation Group Co., Ltd., Lanzhou, Gansu 730010, China

Received:2021-07-08 Revised:2021-08-23 Online:2022-04-15 Published:2022-04-18
Supported by:
This work was supported by the National Natural Science Foundation of China (52168053, 51978320), the Youth Foundation of Qinghai Province Science and Technology Department Project (2021-ZJ-943Q) and the Funds for Creative Research Groups of Gansu Province (20JR5RA478).

摘要/Abstract

摘要： 基于单相弹性介质与非饱和多孔介质中波的传播理论和Snell定律，研究了P1波从非饱和土介质中入射到波阻板（wave impeding block，WIB）时的传播特性。推导了P1波在非饱和土地基中通过波阻板后反射波和透射波振幅比的解析解，分析了反射波振幅比和透射波振幅比与波阻板的剪切模量、密度以及入射角、入射频率、饱和度等各种参数的关系曲线，从而得到这些参数对非饱和土地基中波阻板隔振效果的影响规律。数值结果表明：波阻板隔振屏障的剪切模量和密度对其隔振性能影响较为显著，当波阻板剪切模量和密度在一定范围内时波阻板隔振屏障可获得较好的隔振性能；入射角对波阻板隔振性能影响较大，而入射频率对其隔振效果影响很小。

关键词: 非饱和土, 波阻板, 波的传播, 反射振幅比, 透射振幅比

Abstract: Based on the theory of wave propagation in single-phase elastic medium and unsaturated porous medium and Snell's law, the propagation characteristics of P1 wave incidence on wave impeding block (WIB) from unsaturated soil are studied. The analytical solution of the amplitude ratio of reflected wave and transmitted wave of P1 wave passing through the wave impeding block in unsaturated soil is derived. The relation curves of amplitude ratios of reflected wave and transmitted wave with the shear modulus and density of the wave impeding block, angle of incident wave, frequency of incident wave, saturation and other parameters are analyzed, thus the influence laws of these parameters on the vibration isolation effect of the wave impeding block in unsaturated soil are obtained. The numerical results show that the shear modulus and density of the wave impeding block significant affect its vibration isolation effect, and the wave impeding block can achieve better vibration isolation performance when the shear modulus and density of the wave impeding block are within a certain range. The incident angle has a great influence on the vibration isolation performance of the wave impeding block, while the incident frequency has little influence on the vibration isolation performance.

Key words: unsaturated soil, wave impeding block, wave propagation, reflection amplitude ratio, transmission amplitude ratio

中图分类号: TU 452

舒进辉, 马强, 周凤玺, 李强, . 非饱和土地基中P1波通过波阻板的传播特性研究[J]. 岩土力学, 2022, 43(4): 1135-1146.

SHU Jin-hui , MA Qiang, ZHOU Feng-xi, LI Qiang, . Propagation characteristics of P1 wave passing through wave impeding block in unsaturated soil[J]. Rock and Soil Mechanics, 2022, 43(4): 1135-1146.

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非饱和土地基中P1波通过波阻板的传播特性研究

Propagation characteristics of P1 wave passing through wave impeding block in unsaturated soil

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