在多成因相互作用下,混凝土拱坝裂缝的出现具有不可避免和随机的特点。为实现对混凝土拱坝裂缝进行全方位、有效的监测,提出了基于瑞利散射优化裂缝分布式光纤监测网络,在分析正交失效混凝土模型试验结果的基础上,得出采用多组交叉平行的组合传感光路监测拱坝裂缝的可行性,并用有限元软件对某拱坝进行应力分析,寻找可能出现裂缝的关键部位和重点部位,提出了优化拱坝裂缝光纤监测网络布设图。 Under the multi-genesis interaction, the emergence of cracks in concrete arch dam is inevitable and random. In order to realize the all-directional and effective monitoring of concrete arch dam cracks, a distributed optical fiber monitoring network based on Rayleigh scattering is proposed. On the basis of analyzing the experimental results of orthogonal failure concrete model, Combined with the feasibility of using the sensing light path to monitor the arch dam cracks, the finite element software was used to analyze the stress of some arch dams, looking for the key parts and key parts of the fractures that may appear, and proposed the layout of optical fiber monitoring network for optimizing arch dam cracks.