本文選題：隧道工程　切入點：小凈距隧道　出處：《振動與沖擊》2017年17期 　論文類型：期刊論文

【摘要】：為了獲得淺埋偏壓小凈距隧道在地震作用下的加速度響應規(guī)律,采用振動臺試驗與數(shù)值模擬相結(jié)合的方法,以雙向大瑞波(DR-XZ)作為加載波,研究了在不同加速度激振峰值作用下淺埋偏壓小凈距隧道的加速度響應規(guī)律,探討了非偏壓與偏壓對淺埋小凈距隧道加速度響應的影響。研究結(jié)果表明:在雙向加載波水平方向上隧道的右半拱加速度響應較為強烈,豎直方向上拱頂與拱腳處加速度響應較為強烈;相對比隧道在加載波的水平方向上加速度響應,豎直方向上隧道加速度響應較為劇烈;地震波的激振方向?qū)λ淼兰铀俣软憫休^大的影響;隧道測點加速度響應變化趨勢受上覆巖層的厚度、中巖柱及巖質(zhì)邊坡等因素影響;振動臺試驗值與數(shù)值模擬值之間的誤差在合理的范圍內(nèi),且兩者變化趨勢較為相似,驗證了振動臺試驗的合理性與數(shù)值模擬結(jié)果的可靠性;相對于偏壓隧道,非偏壓隧道的加速度響應規(guī)律性較強,偏壓對隧道加速度響應的影響作用較強。
[Abstract]:In order to obtain the acceleration response law of shallow buried bias small net distance tunnel under earthquake action, the method of shaking table test and numerical simulation is adopted, and the bidirectional large Rayleigh wave (DR-XZ) is used as the loading wave. In this paper, the acceleration response law of the tunnel with shallow bias voltage and small net distance under the action of different acceleration excitation peaks is studied. The effects of non-bias voltage and bias voltage on the acceleration response of shallow buried tunnel with small net distance are discussed. The results show that the acceleration response of the right half arch of the tunnel is relatively strong in the horizontal direction of the bidirectional loading wave. Compared with the acceleration response of the tunnel in the horizontal direction of the loading wave, the acceleration response of the tunnel in the vertical direction is stronger than that of the tunnel in the vertical direction. The direction of excitation of seismic wave has great influence on the acceleration response of tunnel, and the change trend of acceleration response of tunnel measuring point is influenced by the thickness of overlying rock layer, the medium rock column and the rock slope, etc. The error between the shaking table test value and the numerical simulation value is within a reasonable range, and the variation trend of the two values is similar, which verifies the rationality of the shaking table test and the reliability of the numerical simulation results. The acceleration response of the unbiased tunnel is more regular, and the influence of bias voltage on the acceleration response of the tunnel is stronger.
【作者單位】： 中南林業(yè)科技大學土木工程與力學學院;中南林業(yè)科技大學巖土工程研究所;
【基金】：國家自然科學基金(51204125;51404309)
【分類號】：U456
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本文編號：1641839