基于地表实测爆破振动的岩体动力学参数快速反演方法

杨招伟; 卢文波; 高启栋; 陈明; 严鹏; 王高辉

doi:10.11779/CJGE201904023

基于地表实测爆破振动的岩体动力学参数快速反演方法 English Version

杨招伟^1,2,
卢文波^1,2, ,,
高启栋^1,2,
陈明^1,2,
严鹏^1,2,
王高辉^1,2

1. 武汉大学水资源与水电工程科学国家重点实验室,湖北武汉 430072;
2. 武汉大学水工岩石力学教育部重点实验室,湖北武汉 430072

基金项目: 国家自然科学基金面上项目（51779190）; 湖北省技术创新专项重大项目(2017ACA102)

详细信息

作者简介:
杨招伟(1992– )，男，博士研究生，主要从事工程爆破与岩石动力学方向的研究工作。E-mail：yangzw@whu.edu.cn。

通讯作者:
卢文波，E-mail：wblu@whu.edu.cn

中图分类号: TV523
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出版历程
- 收稿日期: 2018-05-20
- 发布日期: 2019-04-24

Inversion of dynamic parameters of rock mass based on field blasting vibration

YANG Zhao-wei^1,2,
LU Wen-bo^1,2, ,,
GAO Qi-dong^1,2,
CHEN Ming^1,2,
YAN Peng^1,2,
WANG Gao-hui^1,2

1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;
2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering, Ministry of Education, Wuhan University, Wuhan 430072, China

摘要

摘要: 岩体动力学参数的准确、快速获取对水利工程设计、施工及建设起着重要作用。尽管可通过现场原位试验、经验关系法等传统方法对其进行评估,但上述传统方法均存在耗时长、投资大等缺点,且难以准确快速的获取大尺度岩体动力学参数。本文通过分析地表实测爆破振动波形,识别出各测点P、S波初至到时,进一步给出各个测点区间内P、S波的平均传播速度,提出基于地表实测振动的岩石动力学参数预测方法。并以丰宁抽水蓄能电站为例,基于爆破试验实测振动数据反演的岩体动态模量约为北京勘测设计研究院推荐使用的静态模量值的2.2~2.9倍,动泊松比为静泊松比的0.9~0.975倍。提出的基于地表实测振动预测岩体动力学参数的方法为工程尺度下快速获取岩体动力学参数提供了一条新途径。
- 岩体动力学参数 /
- 工程尺度 /
- 实测振动 /
- 初至到时
Abstract: How to obtain the dynamic parameters of rock mass quickly and precisely is a popular and difficult problem in geotechnical engineering, which plays a very important part in the engineering design or construction. Currently, scholars have developed many methods to obtain these parameters, such as in-situ testing method, empirical formula and so on. However, these methods need large investments and long construction period, etc., which cannot obtain the dynamic parameters precisely and quickly in the engineering scale. A new method for estimating the rock parameters based on field blasting vibration signals is proposed. By identifying the arrival times of P and S waves, the propagation velocities of P and S waves are calculated, and the parameters can be obtained. By analyzing the field blasting vibration signals in Fengning pumped-storage power station, the results demonstrate that the dynamic elastic modulus of the rocks inversed by the field blasting vibration signals is higher than its static one given by Beijing Engineering Corporation Limited, i.e. the ratio is about 2.2~2.9, and the inversed dynamic Poisson's ratio is lower than its static one, 0.9~0.975 times the static one. Therefore, the proposed method based on field blasting vibration provides a new and effective way for obtaining the dynamic parameters of rock mass.
- dynamic parameter of rock mass /
- engineering scale /
- field blasting vibration /
- arrival time

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