静水条件下振动对测压水位影响实验

发布时间：2018-02-16 17:26

本文关键词： 静水条件振动实验均质承压含水层测压水位　出处：《地震学报》2017年03期 　论文类型：期刊论文

【摘要】：将自行设计的井-承压含水层渗流系统置于地震模拟振动台之上,探究静水条件下测压水位的同震响应特征.该实验含12组工况,加载频率f_(in)分别为0.5,1,2,5,10,15 Hz和加速度ain分别为1.5,2.5m/s2的正弦波.研究结果表明:测压水位呈现阶升、阶升—振荡、振荡和阶降—振荡等4种响应变化形态,与天然地震同震响应井水位变化形态具有一定的相似性;12组工况中,测压水位和孔隙水压力在加载低频(f_(in)=1,2 Hz)工况时均呈下降变化,中高频(f_(in)=5,10Hz)时为上升变化,高频(f_(in)=15Hz)时为振荡变化,且加速度峰值也会影响二者的变化形态;测压水位和孔隙水压力的变幅均随输入频率的增大呈先增大后减小的变化规律,其最大变幅分别出现在ain=1.5m/s2,f_(in)=10 Hz和ain=2.5m/s2,f_(in)=5Hz两种工况中.
[Abstract]:The self-designed well confined aquifer seepage system is placed on the shaking table of earthquake simulation, and the co-seismic response characteristics of the pressure level under static water condition are investigated. The experiment consists of 12 sets of working conditions. The loading frequency fapper is 0.5 / 1 / 2 / 1015 Hz and the acceleration ain is 1.5 / 2.5m / s ~ 2 respectively. The results show that the water level of pressure measurement shows four kinds of response patterns: step up, step up oscillation, oscillation and step down oscillation, etc. The results show that there are four kinds of response modes, such as step up, step up and step down oscillation, respectively, and the results show that the measured pressure level has four kinds of response patterns: step up, step up and oscillation. In 12 groups of working conditions, the pressure level and pore water pressure of natural earthquake response wells are similar to that of natural seismic response wells. The pressure level and pore water pressure decrease under the loading condition of low frequency / low frequency (FV) and increase at middle and high frequency (F / F) / 50 ~ (10) Hz / h ~ (-1), respectively, when the water level of the well is similar to that of the natural earthquake's co-seismic response well, and the variation of the pressure level and pore water pressure is similar. At high frequency, the oscillatory variation is observed, and the peak acceleration also affects the variation pattern of both, and the variation of the pressure level and pore water pressure increases first and then decreases with the increase of input frequency, and the variation of the pressure level and pore water pressure increases firstly with the increase of input frequency, and then decreases with the increase of input frequency. The maximum variation ranges are found in the two working conditions of 1.5 m / s ~ (2) / s ~ (2) C ~ (-1) S _ (2) S _ (2) S _ (2) C _ (1) and 2. 5 m / s ~ (2) / s ~ (2) / s ~ (2) / s ~ (
【作者单位】：防灾科技学院;
【基金】：国家自然科学青年基金资助项目(41302198) 中国地震局地震科技星火计划项目(XH16059) 黑龙江省水利科技项目(NGZL/KY04)联合资助
【分类号】：P315.723

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