地铁出入段线类矩形盾构隧道振动传递特性测试分析
刘爱德1张斌2许永富1
Test Analysis of Quasi-rectangular Shield Tunnel Vibration Transmission Characteristics on Metro Access Lines
LIU AideZHANG BinXU Yongfu
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作者信息:1.宁波市轨道交通集团有限公司，315101，宁波；
2.隔而固（青岛）结构设计事务所有限公司，266108，青岛
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Affiliation:Ningbo Rail Transit Group Co., Ltd.， 315101， Ningbo， China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2019.03.026
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中图分类号/CLCN:U451+.3
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栏目/Col:研究报告
摘要:
以宁波地铁3号线一期工程出入段线类矩形盾构隧道为研究对象，在隧道内与地面布置加速度传感器进行同步测试分析，测试分为一列列车运行与两列列车同向并行运行两种行车工况。结果表明：两列列车同向并行运行工况与一列列车运行工况相比，同一测点振动加速度有效值明显增大；各测点振动加速度级在绝大部分频段均有增大，且在4 Hz处增大最显著；两种行车工况下，过车引起的振动由隧道壁向地面各测点传播过程中，呈波动衰减趋势，高频段振动传递损失较低频段大，大部分测点在5 Hz以内频段传递损失均出现负值，说明此频段附近振动加速度从隧道壁传递至地面有放大现象；两列列车同向并行运行工况对环境振动评价影响较大，在线路设计时，建议考虑列车会车对环境振动的影响。
Abstracts:
The quasi-rectangular shield tunnel on the access lines in the first phase project of Ningbo metro Line 3 is studied. Acceleration sensors are fixed on the tunnel and ground for the synchronous test, which is divided into two operation conditions: one train running and two trains co-directional parallel running. The results show that compared with one train running, the effective value of vibration acceleration at the same test point for the two trains parallel running is obviously increased; the vibration acceleration level at each test point is increased in most frequency bands, and the increase is most significant at 4 Hz. In both conditions, the vibration transmission from tunnel wall to test points on the ground attenuates in the form of fluctuation, and the transmission loss in high frequency section is greater than in low frequency section. Since the transmission loss for most of the test points is negative below 5 Hz, it indicates that the vibration acceleration in this section from tunnel wall to ground is amplified, and the condition with two trains parallel running has a great influence on the environmental vibration evaluation. So, in the line design, the impact on the environmental vibration caused by train running should be considered.
引文 / Ref:
刘爱德，张斌，许永富.地铁出入段线类矩形盾构隧道振动传递特性测试分析[J].城市轨道交通研究，2019，22（3）：111.
LIU Aide，ZHANG Bin，XU Yongfu.Test Analysis of Quasi-rectangular Shield Tunnel Vibration Transmission Characteristics on Metro Access Lines[J].Urban mass transit，2019，22（3）：111.
LIU Aide，ZHANG Bin，XU Yongfu.Test Analysis of Quasi-rectangular Shield Tunnel Vibration Transmission Characteristics on Metro Access Lines[J].Urban mass transit，2019，22（3）：111.
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