浅埋偏压小净距隧道加速度响应规律试验与数值模拟研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (17) : 238-247.

论文

王飞飞1,2，江学良1,2，杨慧1,2，连鹏远1,2，牛家永1,2

作者信息 +

Experiment and numerical simulation study on acceleration response laws of shallow-buried small spacing tunnel with asymmetrical pressure

WANG Feifei1,2, JIANG Xueliang1,2, YANG Hui1,2, LIAN Pengyuan1,2, NIU Jiayong1,2

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摘要

为了获得浅埋偏压小净距隧道在地震作用下的加速度响应规律，采用振动台试验与数值模拟相结合的方法，以双向大瑞波（DR-XZ）作为加载波，研究了在不同加速度激振峰值作用下浅埋偏压小净距隧道的加速度响应规律，探讨了非偏压与偏压对浅埋小净距隧道加速度响应的影响。研究结果表明：在双向加载波水平方向上隧道的右半拱加速度响应较为强烈，竖直方向上拱顶与拱脚处加速度响应较为强烈；相对比隧道在加载波的水平方向上加速度响应，竖直方向上隧道加速度响应较为剧烈；地震波的激振方向对隧道加速度响应有较大的影响；隧道测点加速度响应变化趋势受上覆岩层的厚度、中岩柱及岩质边坡等因素影响；振动台试验值与数值模拟值之间的误差在合理的范围内，且两者变化趋势较为相似，验证了振动台试验的合理性与数值模拟结果的可靠性；相对于偏压隧道，非偏压隧道的加速度响应规律性较强，偏压对隧道加速度响应的影响作用较强。

Abstract

In order to obtain the dynamic response laws of shallow-buried small spacing tunnel with asymmetrical pressure under earthquake action. The combination method of shaking table test and numerical simulation was performed to study the acceleration response laws of the tunnel under the action of different acceleration excitation peak of Da Rui wave (DR-XZ).The effects of asymmetrical pressure and symmetrical pressure on the acceleration response of the shallow-buried small spacing tunnel were discussed. Research results show that in the horizontal direction of bidirectional loading wave, the acceleration response of the right half arch of the tunnel is mainly intense. In the vertical direction, the response of the arch crown and arch foot is stronger. Compared with the acceleration response of the tunnel in the horizontal direction of bidirectional loading wave, the acceleration response is more severe in the vertical direction. The excitation direction of seismic wave has great influence on the acceleration response of the tunnel. The tunnel acceleration response trend is affected by the thickness of overlying strata, middle rock wall and rock slope and so on. The difference between shaking table test and numerical simulation is in a reasonable error range, and the change trend is similar, which verifies the rationality of the shaking table test results and the reliability of numerical simulation results. Compared with the tunnel of asymmetrical pressure, the acceleration response regularity of the tunnel of symmetrical pressure is better. The asymmetrical pressure has significant effect on the acceleration response.

导出引用

王飞飞1,2，江学良1,2，杨慧1,2，连鹏远1,2，牛家永1,2 . 浅埋偏压小净距隧道加速度响应规律试验与数值模拟研究[J]. 振动与冲击, 2017, 36(17): 238-247

WANG Feifei1,2, JIANG Xueliang1,2, YANG Hui1,2, LIAN Pengyuan1,2, NIU Jiayong1,2. Experiment and numerical simulation study on acceleration response laws of shallow-buried small spacing tunnel with asymmetrical pressure[J]. Journal of Vibration and Shock, 2017, 36(17): 238-247

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