列车荷载作用下联络横通道对平行交叉盾构隧道振动影响机制的试验研究

doi:10.13722/j.cnki.jrme.2021.0276

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摘要城市地铁中广泛存在由联络横通道连接形成的平行交叉盾构隧道，在列车振动荷载作用下该特殊结构段的动力响应问题更加突出。通过建立有、无横通道的2种平行交叉的盾构隧道模型，研究列车荷载作用下平行交叉盾构隧道的动力响应特征，探明联络横通道对两主隧道振动响应的影响机制，得到以下结论：联络横通道的存在将会减小列车荷载所在隧道的动力响应，其影响范围约为横通道宽度的2倍；而对于相邻的另一主隧道，当中心频程低于125 Hz时，衬砌结构的三分之一倍频程因横通道的存在而增加，且频率越低影响越大。横通道对两主隧道振动响应的影响机制在于：横通道结构的整体性和密实性远高于土体，列车行驶产生的振动波在横通道中传播的损耗低于土体，且频率越低的振动波在传递过程中损耗更快。

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	晏启祥1
	王二力1
	张君臣1
	孙明辉1
	姚超凡1
	陈文宇2

关键词 ：隧道工程, 联络横通道, 列车振动荷载, 平行交叉盾构隧道, 动力响应, 三分之一倍频程

Abstract：Two adjacent tunnels which connected by a transverse passage are widely used in urban subways. The dynamic response of the special structure section is more prominent under the train vibration load. Two parallel cross shield tunnel models with and without transverse passages were carried out in this paper. The dynamic response characteristics of parallel cross shield tunnel under train load were studied. The influence mechanism of cross passage on the vibration response of two main tunnels was explored. Results show that the existence of the cross passage will reduce the dynamic response of the tunnel where the train load is located，and its influence range is about twice the width of the cross passage. While，For another adjacent main tunnel，when the center frequency is lower than 125 Hz，the one-third octave frequency of the lining structure increases due to the existence of the cross passage，and the lower the frequency is，the greater the impact is. The influence mechanism of the cross passage on the vibration response of the two main tunnels is as follows：Since the integrity and compactness of the cross passage is much higher than that of the soil，the vibration wave generated by the train load in the cross passage has a lower loss than the soil. Moreover，the lower the frequency of the vibration wave is，the faster the loss during the wave propagation process is.

Key words： tunnelling engineering transverse passage train vibration load parallel cross shield tunnel dynamic response one-third octave frequency

引用本文:

晏启祥1，王二力1，张君臣1，孙明辉1，姚超凡1，陈文宇2. 列车荷载作用下联络横通道对平行交叉盾构隧道振动影响机制的试验研究[J]. 岩石力学与工程学报, 2022, 41(S1): 2892-2900.
YAN Qixiang1，WANG Erli1，ZHANG Junchen1，SUN Minghui1，YAO Chaofan1，CHEN Wenyu2. Experimental study on the mechanism of the influence of transverse passage on vibration response of parallel cross shield tunnel under train load. , 2022, 41(S1): 2892-2900.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0276 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/IS1/2892

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