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在荷载作用下,混凝土面板裂缝的产生具有很大的时空随机性,为实现对面板裂缝的实时在线监测,提出了基于OTDR的分布式裂缝光纤监测网络优化技术路线,在考虑正交检测失效和光纤埋设工艺的基础上,对比分析了几种不同光纤监测网络的优缺点,并结合某面板堆石坝有限元应力计算分析结果,提出了光纤网络呈斜交网格布置为优化的面板裂缝光纤监测网络构型。
Under the action of load, the crack of concrete slab has a great spatiotemporal randomness. In order to realize real-time on-line monitoring of crack in the slab, an optimization technology of distributed crack optical fiber monitoring network based on OTDR is proposed. Considering orthogonal test failure and Based on the optical fiber embedding process, the advantages and disadvantages of several different optical fiber monitoring networks are compared and analyzed. Combined with the finite element stress calculation and analysis results of a concrete faced rockfill dam, the optical fiber network is put forward to optimize the fiber crack Monitor network configuration.