In this paper, the writer studied a new detecting technique-expanding bolt pullout method by using expanding bolt as bulkhead.

本文采用胀栓作为锚固件，研究胀栓拔出法新无损检测技术。

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Finally, the thesis analyzed the concrete failure mechanism of expanding bolt pullout method and summarized the influence of it.

本文分析了胀栓拔出法混凝土破坏机理，总结了胀栓拔出法的各种影响因素。

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Finally, the thesis analyzed the concrete failure mechanism of expanding bolt pullout method and summarized the influence of it.

本文分析了胀栓拔出法混凝土破坏机理，总结了胀栓拔出法的各种影响因素。

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