Testing and analysis on vibration of Plastic concrete impermeable wall caused by dynamic compaction

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (1) : 68-71,1.

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Testing and analysis on vibration of Plastic concrete impermeable wall caused by dynamic compaction

ＬＵＦａｎｄｏｎｇ; ＦＡＮＧＸｉａｎｇ; ＤＯＮＧＷｅｎ; ＤＩＮＧＫａｉ; ＬＩＤｏｎg

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Abstract

A plan based on vibration test of plastic concrete impermeable wall caused by dynamic compaction is presented. Experimental data shows: acceleration control index 0.1g is more stringent than speed control index 5cm/s; safety protection ranges of five different damping energy levels are given. Based on time-frequency analysis of HHT method, dominant frequencies of monitor points of plastic concrete impermeable wall under different damping energy levels are lower than 20Hz; Rayleigh wave plays a dominant role on vibration of plastic concrete impermeable wall which is buried five meters deep under the land surface, performed as the top of the wall vibrated firstly and the largest data appeared at the top; stress distributes uniformly along the wall in the vertical direction; due to the influence of layered foundation to Rayleigh wave, when dominant frequency descends ,wave velocity and wave length are increased, so do maximum instantaneous energy and energy at dominant frequency.

Key words

dynamic compaction / plastic concrete impermeable wall / vibration test / time-frequency analysis

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ＬＵＦａｎｄｏｎｇ;ＦＡＮＧＸｉａｎｇ;ＤＯＮＧＷｅｎ;ＤＩＮＧＫａｉ;ＬＩＤｏｎg. Testing and analysis on vibration of Plastic concrete impermeable wall caused by dynamic compaction[J]. Journal of Vibration and Shock, 2012, 31(1): 68-71,1