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。
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。
Objective: To compare the initial stability and pullout strength of threaded and non threaded cervical interbody fusion devices on human specimens by biomechanical method.
目的：用生物力学的方法比较螺旋式与环式椎体融合器的初始稳定性和拔出力量。
By dyed sand observation method in plane-strain pullout tests, a novel theory about the pullout mechanism of denti-strip reinforced soil is introduced.
采用染色砂法，对带齿筋材的平面应变拉拔试验过程进行了观察。
The method of ultrasonic and pullout test can get higher precision for measuring concrete compressive strength.
超声拉拔综合法用于检测砼的强度，可以提高测试精度。
The method of ultrasonic and pullout test can get higher precision for measuring concrete compressive strength.
超声拉拔综合法用于检测砼的强度，可以提高测试精度。
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