EXPERIMENTAL STUDY OF VIBRATIONS IN UNDERGROUND STRUCTURES

IF 0.3 Q4 ENGINEERING, GEOLOGICAL Geotechnical Engineering Pub Date : 2003-04-01 DOI:10.1680/GENG.2003.156.2.75
N. Thusyanthan, S. Madabhushi
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引用次数: 10

Abstract

Vibrations produced on the ground surface by engineering construction processes can damage underground structures. At present there is little knowledge of the level of surface vibrations that could cause such damage. The relevant British Standards, BS 5228 and BS 7385, have little relevance to underground structures. This paper presents experimental investigations on small model tunnels that were instrumented with miniature accelerometers. Impulsive and vibratory loadings were produced on the soil surface by a drop hammer mechanism and an electric eccentricmass motor respectively to simulate dynamic loading from construction activity. It was found that tunnels with different lining materials absorb different amounts of vibration energy. Power spectrum analysis of the acceleration signals showed that the vibrations are transferred into a brass model tunnel at lower frequencies than for a plastic model tunnel. A relationship has been proposed for the ratio of energy transferred and the ratio of impedance mi...
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地下结构振动的实验研究
工程施工过程中在地表产生的振动会破坏地下结构。目前,人们对可能造成这种损害的地表振动程度知之甚少。相关的英国标准BS 5228和BS 7385与地下结构的相关性很小。本文介绍了安装微型加速度计的小型模型隧道的实验研究。采用落锤机构和偏心质量电机分别对土体表面施加脉冲和振动载荷,模拟施工活动产生的动载荷。研究发现,不同衬砌材料的隧道吸收的振动能量不同。加速度信号的功率谱分析表明,振动以较低的频率传递到黄铜模型隧道,而不是塑料模型隧道。提出了传递能量比与阻抗阻抗比的关系式。
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来源期刊
Geotechnical Engineering
Geotechnical Engineering ENGINEERING, GEOLOGICAL-
CiteScore
0.50
自引率
0.00%
发文量
0
期刊介绍: The objectives of the Association shall be the promotion of co-operation among geotechnical societies in SE Asia; and the assistance to member societies who have limited number of members. Now there is only one combined web titled: AGSSEA-SEAGS. SEAGS & AGSSEA encourage the submission of scholarly and practice-oriented articles to its journal. The journal is published quarterly. Both sponsors of the journal, the Southeast Asian Geotechnical Society and the Association of Geotechnical Societies in Southeast Asia, promote the ideals and goals of the International Society of Soil Mechanics and Geotechhnical Engineering in fostering communications, developing insights and enabling the advancement of the geotechnical engineering discipline.
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