激振法对软岩高地应力超前释放数值模拟研究

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摘要针对高地应力软岩隧道的应力释放现状的缺点与不足，提出了一种新的超前应力释放方法，采用激振器进行机械激振的方式来对岩体进行预处理，完成应力的超期释放，从而有利于减小隧道后续开挖完成后衬砌的变形。并且针对TBM掘进技术，参考了现有的井巷共振掘进技术，采用一种适配于TBM掘进系统的新设备，根据新设备的工艺以及作用方式，对激振过程进行了模拟分析，并且针对激振频率、激振幅值以及激振深度三个因素与应力释放的相关性进行了研究，得到了最有利于应力释放的频率、幅值与深度，并结合模拟后续隧道开挖所得到的隧道变形结果，进一步验证了此种工况组合的有效性，为此种方法的后续实际应用提供了依据。

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	朱英1
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	李新宇2
	尤卫星1
	唐小微2

关键词 ：软岩, 机械激振, 高地应力, 超前释放, FLAC3D

Abstract：In view of the shortcomings and shortcomings of the present stress release situation of the tunnel in soft rock with high geostress, a new advanced stress release method is put forward, which adopts the mechanical vibration exciter to pretreat the rock mass, the stress releasing beyond the time limit is completed, which is beneficial to reduce the deformation of the lining after the tunnel excavation is completed. In view of TBM driving technology, referring to the existing shaft and roadway resonant driving technology, adopting a new equipment suitable for TBM driving system, according to the technology of the new equipment and mode of action, the process of excitation is simulated and analyzed, and the correlation between the frequency, amplitude and depth of excitation and stress release is studied, the frequency, amplitude and depth which are most favorable for stress release are obtained, and the validity of this combination is further verified by the tunnel deformation results obtained from the following tunnel excavation, it provides a reference basis for the subsequent practical application of this method.

Key words： soft rock mechanical vibration high geostress advance stress relief FLAC3D

收稿日期: 2022-08-07 出版日期: 2023-11-28

引用本文:

朱英1,2，李新宇2，尤卫星1，唐小微2. 激振法对软岩高地应力超前释放数值模拟研究[J]. 振动与冲击, 2023, 42(22): 163-168.
ZHU Ying1,2，LI Xinyu2，YOU Weixing1，TANG Xiaowei2. Numerical simulation of high geostress relief in soft rock by the mechanical vibration method. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(22): 163-168.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I22/163

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