分布式光纤传感器–砂岩黏接性能试验研究

doi:10.13722/j.cnki.jrme.2022.0509

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摘要为了研究分布式光纤传感器与石窟寺岩体间的黏接固定问题，选择2种不同类型石窟寺砂岩以及3种不同成分的胶黏剂作为研究对象，开展一系列光纤传感器与砂岩界面的表面黏接试验研究，分析胶黏剂和岩石类型对黏接强度、变形特征、破坏模式的影响规律，并探讨对界面黏接强度的影响机制。研究结果表明：(1) 结构致密砂岩的黏接强度明显高于结构疏松的砂岩，氰基丙烯酸脂类胶黏剂的光纤传感器–砂岩界面黏接强度比聚氨酯类、环氧树脂类胶黏剂更高；(2) 基于光纤传感器荷载–位移曲线非线性拟合得到的光纤传感器与岩样黏接后受拉拔力时所受荷载与移动位移之间的表达式与锚杆轴力表达式非常相似；(3) 光纤传感器与砂岩界面间有4种破坏模式：光纤护套被拉断、岩石表层破裂、光纤与黏接层脱离、光纤与夹具脱离；(4) 胶黏剂的渗透范围和黏接形态与胶黏剂的黏性、固化时间、岩样的孔隙率等因素有关，黏接界面强度与破坏模式关系密切。研究认识可为分布式光纤传感器在石窟寺岩体稳定性监测上应用提供科学依据和技术指导。

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	原鹏博1
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	张文婷1
	姚俊1
	王楚斌1
	朱磊1
	林敖1

关键词 ：岩石力学, 石窟稳定性, 预防性保护, 监测, 胶黏剂, 破坏模式

Abstract：In order to investigate the bonding performance between the distributed optical fiber sensor and rock mass of Grotto Temple，a series of surface bonding tests were carried out using two different types of Grotto Temple sandstone and three kinds of adhesives with different components. The interface bonding strength，deformation characteristics and failure mode were analyzed，and then the influence mechanism of adhesive and rock type on the bonding strength was discussed. The results indicate that：(1) for all different adhesives，the bonding strength between sandstone with compact structure and distributed optical fiber sensor was higher than loose sandstone?s. For the same sandstone samples，the bonding performance of cyanoacrylate adhesive is better than polyurethane and epoxy resin. (2) It was found that the expression of the load-displacement curves of distributed optical fiber sensor and sandstone bonding tests is very similar to the expression of the axial force of the bolt based on the nonlinear fitting. (3) The failure modes of the interfaces of distributed optical fiber sensor and sandstone are divided into fiber sensor sheath broken，rock surface rupture，fiber sensor and adhesive layer separation and fiber sensor and fixture separation. (4) The penetration range and bonding shape of adhesive are related to adhesive viscosity，curing time and porosity of rock sample. Bonding strength has a significant effect on the failure modes of the interfaces of distributed optical fiber sensor and sandstone. The research results can provide a technical support for the application of distributed optical fiber sensor in the field of rock mass stability monitoring of Grotto Temple.

Key words： rock mechanics grotto stability preventive conservation monitoring adhesive failure mode

引用本文:

原鹏博1，2，张文婷1，姚俊1，王楚斌1，朱磊1，林敖1. 分布式光纤传感器–砂岩黏接性能试验研究[J]. 岩石力学与工程学报, 2023, 42(S1): 3437-3446.
YUAN Pengbo1，2，ZHANG Wenting1，YAO Jun1，WANG Chubin1，ZHU Lei1，LIN Ao1. Experimental research on bonding performance between distributed optical fiber sensor and sandstone. , 2023, 42(S1): 3437-3446.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0509 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/IS1/3437

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