A new method to determine the surrounding rock pressure in twin tunnels with small clear spacing

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-09-22 DOI:10.1016/j.tust.2025.107106

Zhiyu Tian , Chuan He , Guowen Xu , Guojin Lin , YueHeng Shu , Jun Wang , Liang Nie

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Abstract

This study introduces a new method for calculating the surrounding rock pressure of twin-tunnels with small clear spacing under various working conditions. The proposed method unifies the calculation approaches for surrounding rock pressure under different working conditions into a single framework. A comparison is made between the new method and the standard recommended methods, and the installation procedures for field monitoring instruments of surrounding rock pressure are standardized. Laboratory experiments are conducted to correct the monitored values of surrounding rock pressure in the field. Additionally, the active–passive load separation method is employed to extract the active load component from the measured pressure values. The results show that the surrounding rock pressure calculated using the new method aligns more closely with actual engineering conditions. The variation trends and absolute magnitudes of surrounding rock pressure are smaller than those obtained using the standard methods. The corrected surrounding rock pressure values are closer to the true surrounding rock pressure. By comparing the active load derived from the measured values with the calculated surrounding rock pressure, the comparison results become more accurate. Furthermore, a three-way comparison among the calculated values from the new method, the standard recommended values, and the field-measured values confirms the correctness of the new method and its rationality and applicability in practical engineering projects.

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一种确定小净距双隧道围岩压力的新方法

本文介绍了一种计算不同工况下小净距双隧洞围岩压力的新方法。该方法将不同工况下围岩压力的计算方法统一到一个框架中。将新方法与标准推荐方法进行了比较，规范了现场围岩压力监测仪器的安装程序。通过室内试验对现场监测的围岩压力值进行了校正。此外，采用主被动负荷分离方法，从实测压力值中提取主动负荷分量。结果表明，新方法计算的围岩压力与实际工程条件更加吻合。围岩压力的变化趋势和绝对值均小于标准方法。修正后的围岩压力值更接近真实围岩压力。将实测值得到的主动荷载与计算得到的围岩压力进行比较，使对比结果更加准确。通过对新方法计算值、标准推荐值和现场实测值的三方面比较，验证了新方法的正确性及其在实际工程中的合理性和适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.