Study on the relationship between cross-hole sonic wave and single-hole sonic wave of rock mass at Jinping I hydropower station

YANG Jing-xi; HUANG Shu-ling; LIU Zhong-xu

doi:10.16285/j.rsm.2019.1053

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Study on the relationship between cross-hole sonic wave and single-hole sonic wave of rock mass at Jinping I hydropower station

更新时间：2026-06-25

- Study on the relationship between cross-hole sonic wave and single-hole sonic wave of rock mass at Jinping I hydropower station
- Vol. 41, Issue 4, Pages: 1347-1356(2020)
- 作者机构：
  
  1. 中国电建集团成都勘测设计研究院有限公司,四川,成都,610072
  2. 长江科学院水利部岩土力学与工程重点实验室,湖北,武汉,430010
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2019.1053
  CLC： TV223
- Online First：01 July 2020，
  
  Published：2020
- 稿件说明：
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YANG Jing-xi, HUANG Shu-ling, LIU Zhong-xu. Study on the relationship between cross-hole sonic wave and single-hole sonic wave of rock mass at Jinping I hydropower station[J]. 2020, 41(4): 1347-1356.
DOI：

YANG Jing-xi, HUANG Shu-ling, LIU Zhong-xu. Study on the relationship between cross-hole sonic wave and single-hole sonic wave of rock mass at Jinping I hydropower station[J]. 2020, 41(4): 1347-1356. DOI： 10.16285/j.rsm.2019.1053.

摘要

声波波速作为可以评价岩石（体）致密与坚硬程度、完整程度、嵌合紧密程度等工程地质特性的综合性单一指标，在工程岩体质量检测和固结灌浆效果评价中获得了广泛的应用。锦屏一级前期勘察阶段开展了22 000多米平洞与承压板变形模量试验配套的对穿、单孔声波测试，11 400多米钻孔单孔声波测试；施工阶段坝基、左岸抗力体开展了11 000多米单孔声波测试，263孔2 380 m的对穿、单孔声波测试，58点承压板变形模量试验配套的对穿、单孔声波测试。依据不同的统计方法（孔段长度、孔数）分别对两个阶段的对穿、单孔声波测试成果进行分析，研究结果表明：单孔声波波速Vp总体上高于对穿声波波速Vcp，且Vp /Vcp比值在1.05～1.20范围；单孔声波波速和对穿声波波速之间的定量关系，可以采用公式Vcp= 1.160 8Vp?1.023 2来描述，且由该式获得的岩体变形模量（Eo50）与单孔声波波速的相关公式，可用于不同岩体等级的变形模量预测。该研究成果可为类似水电水利工程岩体对穿声波波速和岩体变形模量的预测提供依据。

Abstract

Acoustic wave velocity is a comprehensive single index for evaluating the engineering geological characteristics of rock mass

such as compactness and hardness of rock

integrity

inlay and so on. It has been widely used in the rock quality inspection and consolidation grouting evaluation. In the prophase prospecting of Jinping I hydropower station

more than 22 000 meters cross-hole and single-hole sonic wave tests by the pressure plate in horizontal tunnel

as well as over 11 400 meters single-hole borehole sonic wave test were carried out. During the construction phase

more than 11 000 meters single-hole sonic wave test

2 380 meters cross-hole and single-hole sonic wave tests in 263 holes as well as cross-hole and single-hole sonic wave tests by the pressure plate at 58 test points were carried out at the dam foundation and resistance body on the left bank. Then

the cross-hole and single-hole sonic wave tests of the two stages were analyzed based on the different statistical methods (length of hole and number of holes). The results show that the velocity of single-hole sonic wave (Vp) is generally higher than that of cross-hole sonic wave (Vcp). The ratio of Vp /Vcp ranges from 1.05 to 1.20. The velocity relationship between the single-hole sonic wave and the cross-hole sonic wave can be described by the formula Vcp =1.160 8Vp?1.023 2. And the correlation formula between the deformation modulus of rock mass and the single-hole acoustic wave velocity obtained by this formula can be used to predict the deformation modulus of different rock mass grades. The results above can provide basis for predicting the velocity of cross-hole sonic wave and deformation modulus of rock mass in similar hydropower and water conservancy projects.

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Related Institution

Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education, Wuhan University

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