| 静水条件下振动对测压水位影响实验 |
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| 引用本文： | 谷洪彪,张璜,谷健芬,张艳,迟宝明.静水条件下振动对测压水位影响实验[J].地震学报,2017,39(3):407-419. |
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| 作者姓名： | 谷洪彪 张璜 谷健芬 张艳 迟宝明 |
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| 作者单位： | 中国河北三河 065201 防灾科技学院 |
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| 基金项目： | 中国地震局地震科技星火计划项目XH16059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) 和黑龙江省水利科技项目(NGZL/KY04) 联合资助黑龙江省水利科技项目NGZL/KY04国家自然科学青年基金资助项目41302198 |
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| 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fin分别为0.5，1，2，5，10，15 Hz和加速度ain分别为1.5，2.5 m/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(fin=1，2 Hz)工况时均呈下降变化，中高频(fin=5，10 Hz)时为上升变化，高频(fin=15 Hz)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=1.5 m/s2, fin=10 Hz和ain=2.5 m/s2, fin=5 Hz两种工况中.
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| 关 键 词： | 静水条件 振动实 均质承压含水层 测压水位 |
| 收稿时间： | 2016-07-05 |
Experiments on response of piezometric level to vibrations under hydrostatic condition |
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| Institution: | Institute of Disaster Prevention, Hebei Sanhe 065201, China |
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| Abstract: | This paper explores the response of water-level on the vibrations under hydrostatic condition by carrying on the experiments that put self-designed well-confined aquifer seepage system on the earthquake simulation shaking table. The experiment includes 12 groups of sine vibrations whose frequencies fin in turns are 0.5, 1, 2, 5, 10, 15 Hz and accelerations ain are 1.5, 2.5 m/s2, respectively. The results indicate: piezometric level presents four kinds of response patterns, that is, ascending, ascending-oscillating, oscillating and descending-oscillating, which are similar with water level variation patterns resulted from earthquakes; among the twelve groups of vibrations, the water level in observation well and pore water pressure were likely to decrease at low frequency (fin=1, 2 Hz), and increase at mid-high frequency (fin=5, 10 Hz), oscillate at high frequency (fin=15 Hz), and the acceleration peak also affects their variation patterns; their variation amplitudes increase first, and then decrease with the increase of input frequency. The maximum amplitude variation respectively appears at the two vibration conditions of ain=1.5 m/s2, fin=10 Hz and ain=2.5 m/s2, fin=5 Hz. |
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