A new two-sensor non-destructive testing method of grouted rock bolts
文献类型：期刊论文
| 作者 | Liu, Liu2; Li, Shaojun2; Jiang, Xi3; Tao, Fengjuan1 |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2022-01-24 |
| 卷号 | 317期号:-页码:- |
| 关键词 | Rock bolt Non-destructive testing Grouted defect Instantaneous phase Automatic identification Two-sensors |
| ISSN号 | 0950-0618 |
| 英文摘要 | Poor anchorage quality of rock bolts is easily caused by inappropriate control of the grouting process, leakage of grouting due to broken rock, and insufficient length of bolts. Wave propagation-based methods were widely used to non-destructive test of rock bolts. Accurate and automatic identification of arrival time of effective reflected waves is significant in the non-destructive test of rock bolts. However, the direct waves and multiple reflections from the start of the bolt body mask weak reflection from the grouted defect and bolt end using only one sensor recording. In this paper, we developed a new stress wave reflection non-destructive test method of rock bolts using a two-sensor acquisition. The sensors are fixed at the free steel bar with clips and the signals are recorded by a two-channel prototype. We define the integrated instantaneous phase difference (IIPD) as an index that characterizes any estimated instantaneous phase difference at the two sensors. The instantaneous phase difference of effective reflected waves between two sensors can be calculated by the two sensors spacing, wave velocity, and dominant frequency of test signals. Higher IIPD values can signify the arrival of a reflection. Thus, IIPD peaks can identify the geometric parameters of rock bolts, the size of the single or multiple grouted defects. Both numerical simulations and experimental model tests were used to demonstrate the effectiveness of the two sensor IIPD method. The two-sensor non-destructive bolt test method and prototype can be widely applied in slope, dam and underground engineering. |
| 学科主题 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000766165300002 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35178]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Wuhan Changsheng Engineering Exploration Technology Development Co., Ltd, Wuhan, Hubei 430312, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 3.Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN 37996, USA |
| 推荐引用方式 GB/T 7714 | Liu, Liu,Li, Shaojun,Jiang, Xi,et al. A new two-sensor non-destructive testing method of grouted rock bolts[J]. CONSTRUCTION AND BUILDING MATERIALS,2022,317(-):-. |
| APA | Liu, Liu,Li, Shaojun,Jiang, Xi,&Tao, Fengjuan.(2022).A new two-sensor non-destructive testing method of grouted rock bolts.CONSTRUCTION AND BUILDING MATERIALS,317(-),-. |
| MLA | Liu, Liu,et al."A new two-sensor non-destructive testing method of grouted rock bolts".CONSTRUCTION AND BUILDING MATERIALS 317.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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