一种适应隧道大变形的限阻耗能型支护结构研发与应用

doi:10.13722/j.cnki.jrme.2018.0184

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摘要为解决隧道大变形初期支护因受力过大而破裂问题，通过理论分析和试验验证，自主研发利用材料峰后性能实现能量释放的“限制支护阻力阻尼器”，简称“限阻器”。通过室内试验和工程调研，确定限阻器设计参数，制定由限阻器组成的限阻耗能型支护的设计和施工方案，并应用于工程实践，得到以下结论：(1) 在应对隧道大变形等高能问题时，支护理念应从传统的大刚度、强支护转变为允许围岩变形、控制围岩能量释放的限阻释能型支护；(2) 限阻器环向嵌入到初期支护受力关键部位中，将传统刚性支护转化为“刚–柔–刚”型的限阻释能型支护，成功解决了深埋老黄土隧道和高地应力水平岩层隧道中初支开裂问题，是一种可行有效的隧道支护手段；(3) 限阻耗能型支护整体性和安全性有保证，且限阻器取材容易，加工方便，施工简单易操作，故限阻器增加了结构安全性的同时又提高了经济性。

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关键词 ：隧道工程, 大变形, 能量释放, 耗能型支护, 限阻器, 峰后性能

Abstract：In order to deal with the failure of primary lining in large deformation tunnel，a kind of lining element named support resistant limiting damper(SRLD) was developed through theoretical analysis and test verification. SRLD helps to limit the internal stress of lining and to release the strain energy stored in rockmass by using its post-peak performance. Through laboratory test and engineering practice，design parameters of SRLD were optimized，and design and construction schemes of energy-dissipating lining based on SRLD were formulated. From the engineering practice of SRLD，the following conclusions were obtained：(1) Traditional lining with large rigidity and small deformation ability is not suitable for large deformation tunnel. The primary lining should be designed to accommodate large deformation and to dissipate strain energy. (2) The traditional rigid support can be converted to the “rigid-flexible-rigid” support and possess large-deformation and energy-releasing capability by tangentially embedding SRLD into it. This type of energy-dissipating support has successfully prevented the cracking of primary lining of tunnels deep buried in old loess and of tunnels with high horizontal geo-stress，showing that SRLD is a feasible and effective supporting element. (3) The energy dissipating support based on SRLD guarantees the structural integrity and safety. SRLD is easy to be processed and installed in construction activities. SRLD enhances the construction safety and reduces cost.

Key words： tunnelling engineering large deformation energy release energy-dissipating support support resistant limiting damper(SRLD) post-peak performance

引用本文:

仇文革1，2，3，王刚1，2，龚伦1，2，申志军4，李畅1，2，党军1，2. 一种适应隧道大变形的限阻耗能型支护结构研发与应用[J]. 岩石力学与工程学报, 2018, 37(8): 1785-1795.
QIU Wenge1，2，3，WANG Gang1，2，GONG Lun1，2，SHEN Zhijun4，LI Chang1，2，DANG Jun1，2. Research and application of resistance-limiting and energy-dissipating support in large deformation tunnel. , 2018, 37(8): 1785-1795.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2018.0184 或 http://www.rockmech.org/CN/Y2018/V37/I8/1785

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